JP2002176714A - Sheath peeling device for sheathed conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheath peeling device for a sheathed conductor which can automatically peel a sheath in the intermediate insulation coat of the continued sheathed conductor and expose a core wire by hardly flawing the core wire, in the case that the sheathed conductor is automatically connected to an electric equipment. SOLUTION: This sheath peeling device comprises a support shaft 23 provided in a rotational end face successively connected in line with a hollow rotary shaft 21 inserting a worked sheathed conductor 1 in the hollow shaft, a rotary pendulum 24 formed in L shape to journal its flexed part to the support shaft 23 to make mass respectively different between L-shaped two sides to make the side of smaller mass approach the rotary shaft center when the side of larger mass is moved outward, and a cutter 25 provided in a direction orthogonal to the worked covered conductor in a tip end of the side of smaller mass. Only a sheath is cut off by the cuter 25 planetary turned by utilizing centrifugal force with a rotational speed of the hollow rotary shaft suitably increased by a rotational speed variable control unit 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating stripping apparatus for stripping a coating at predetermined intervals while keeping a single-core coated electric wire continuous.

[0002]

2. Description of the Related Art FIG. 7 is a diagram in which an insulating coating is peeled off at a predetermined interval in the middle while a coated electric wire is continued. In the figure, reference numeral 1 denotes a covered electric wire, and 1a denotes an exposed portion of a core wire in which an insulating coating is peeled off from the covered electric wire 1. In general, when connecting electric equipment to electric equipment, the insulated electric wire 1 is cut into small pieces and stripped at both ends, and then connected to the electric equipment. When this connection operation is automated, the coated electric wire 1 is a stranded wire or a long wire. In the case of (1), the shape of the cut wire was not determined and was irregular, and it was difficult to automatically supply the cut wire. Therefore, in order to automatically supply such an insulated wire 1 continuously, a method is adopted in which the sheath is peeled off at predetermined intervals in the middle while being continuous to expose the core wire, and supplied while cutting at the core wire exposed portion 1a. There is.

[0003]

However, in order to peel off the insulating coating in the middle of such a continuous insulated wire, the insulating coating is cut off with a simple blade tool and then manually peeled off with a cutter knife. Was. For this reason, the workability is poor, the core wire is easily damaged, and in the case of a stranded wire made of a thin wire, the surrounding fine core wire is missing due to the scratch and the conductive area as an electric wire may be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and in automating the connection of a covered wire to an electric device, an intermediate insulating covering of a continuous covered wire is automatically formed with almost no damage to a core wire. Provided is a device for stripping a coated electric wire, which can expose a core wire by stripping the coating.

[0005]

According to a first aspect of the present invention, there is provided an apparatus for stripping and covering a coated electric wire, wherein the coated electric wire to be processed is provided at a position other than the rotational axis of a rotary end face connected to a hollow rotary shaft penetrating through the hollow shaft. And the L-shaped bent portion is pivotally supported by the support shaft, and the two sides of the L-shape have different masses, and the side having the larger mass moves outward when the side having the larger mass is smaller. Equipped with a rotary pendulum close to the rotation axis, a blade provided at a tip of a side having a small mass in a direction orthogonal to the coated electric wire to be processed, and a rotation speed variable means for changing a rotation speed of the hollow rotation shaft. Things.

[0006] A vertical cutting blade is provided at the stripping position to cut the coated wire in the longitudinal direction.

[0007] Further, there is provided means for adjusting the mass of the side of the rotary pendulum.

[0008] Further, there is provided a coating removing means for bending and breaking the cut portion of the coated electric wire to separate the coating.

Next, there is provided a means for electrically connecting the core wire of the coated electric wire and a means for electrically connecting the core wire to the blade. When the electrical conduction between the core wire and the blade is detected when the rotation speed of the hollow rotary shaft is increased, the hollow is detected. When the rotation of the rotating shaft is slightly accelerated, the rotation of the hollow rotating shaft is reduced when the electric conduction time reaches a time corresponding to one rotation of the hollow rotating shaft.

[0010] When the elapsed time from the initial detection of electrical continuity between the core wire of the coated electric wire and the blade to the start of deceleration of the hollow rotary shaft exceeds a set time, a blade wear alarm is output. It is.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 is an overall configuration diagram of a coating stripping apparatus showing an embodiment of the present invention, FIG. 2 is a side view of the coating stripping mechanism, FIG. 3 is a left front view of the coating stripping mechanism of FIG. 2 in a stationary state, and FIG. It is a left front view of the operating state of the peeling mechanism. In the figure, reference numerals 1 to 1a are the same as those in the description of the conventional technique. 2 is a stripping mechanism, 3 is a support for supporting the stripping mechanism 2, 4 is a control unit, 5 is a winding drum for winding the stripped electric wire 1 on which intermediate insulating stripping has been completed,
Reference numeral 5a denotes a winding motor for applying a winding force to the winding drum 5, and 6 denotes a gripper, which feeds the insulated wire 1 in a fixed size in accordance with a command from the control unit 4 and cuts the insulated wire 1 when cutting into the insulated outer periphery described later. Stop rotation. Reference numeral 6a denotes a conductive piece attached to the gripper 6, which contacts the core wire exposed portion 1a when the gripper 6 grips the insulated wire 1, and makes the core wire and the control portion 4 conductive. Reference numeral 7 denotes a vertical cutting blade, and reference numeral 8 denotes a pusher. The vertical cutting blade 7 is pressed against the coated electric wire 1 in accordance with a command from the control unit 4 to make a longitudinal cut in the coated electric wire 1 from above and below. 9 is a back tension device for applying tension to the coated electric wire 1 being processed, and 10 is a coating removing roller.

Next, the detailed structure of the coating stripping mechanism 2 will be described. Reference numeral 21 denotes a hollow rotary shaft, and the bearing 3a
, And the coated wire 1 to be processed penetrates through the hollow portion. Reference numeral 22 denotes a rotary plate attached to the hollow rotary shaft 21, and reference numeral 23 denotes a support shaft erected near the outer periphery of a rotary plane of the rotary plate 22 in parallel with the axial direction of the hollow rotary shaft 21. Reference numeral 24 denotes a substantially L-shaped rotary pendulum, and a shaft hole provided in the L-shaped bent portion is pivotally supported by the support shaft 21 so as to be swingable. The two sides of the L-shaped pendulum 24 have different masses with respect to the shaft hole. Reference numeral 25 denotes a blade provided at the tip of the L-shaped small side of the rotary pendulum 24 perpendicular to the electric wire coating. In this embodiment, a commercially available circular cutter blade 2 is used.
An example using a sheet is shown. Reference numeral 26 denotes a weight adjustment nut attached to the L-shaped side of the rotary pendulum 24 having a large mass. This is for adjusting the amount of cut and the rotation speed depending on the wire diameter of the coated wire 1 to be processed. Although one weight adjustment nut 26 is shown in the figure, a plurality of weight adjustment nuts may be provided.

Reference numeral 27 denotes a support provided on the rotation plane of the rotation plate 22 in parallel with the axial direction of the hollow rotation shaft 21. An electric wire receiver 28 composed of two rotating rollers is provided on the column 27 on the opposite side of the blade 25 along the coated electric wire 1 to be processed. Further, the support column 27 is provided with a spring 29 that urges the blade 25 in the direction in which the blade 25 is separated from the coated wire 1 to be processed, with the rotary pendulum 24. Reference numeral 30 denotes a blade stopper, which prevents an excessive cut of the blade 25 due to excessive rotation. The position of the blade stopper 30 can be adjusted according to the thickness of the coated wire 1 to be processed. Reference numeral 31 denotes a motor whose rotation speed is variable, and 21 rotates the hollow rotary shaft 21 while meeting the belt 32. The rotation speed of the motor 31 is variably controlled by the control unit 4.

The following is a description necessary for the description of the second embodiment.
Is a current collecting ring provided on the rotating plate 22, and 34 is a current collector that contacts the current collecting ring 33, and the control unit 4 and the blade 25 are electrically connected through the current collecting 34. The conductive piece 6a attached to the gripper 6 is a core exposed portion 1a.
, And insulated current collecting rings 3 so as to separately capture conduction between the two blades 25 and the core wire of the insulated wire 1.
3 and two current collectors 34 are provided.

Next, the operation will be described. The covered electric wire 1 is inserted through the hollow portion of the hollow rotating shaft 21, the gripper 6 grips one end of the covered electric wire 1, and the covered electric wire 1 is tensioned by the back tension device 9 with an appropriate tension. At the same time, the rotating plate 22 is rotated by the motor 31. Due to this rotation, the side of the rotary pendulum 24 having a large mass receives centrifugal force toward the outer peripheral side. When this rotation is accelerated, the centrifugal force exceeds the urging force of the spring 29, and the side of the rotary pendulum 24 where the mass is large moves to the outer peripheral side as shown by the arrow in FIG. Along with this, the blade 25 at the tip of the side with the smaller mass of the rotary pendulum 24 comes into contact with the covered electric wire 1 and makes a cut around the covered electric wire 1. At this time, the covered electric wire 1 is supported by the electric wire receiver 28 so as not to escape from the blade 25. Motor 3
If the maximum number of revolutions of 1 is appropriately set, the coating of the coated electric wire 1 is cut, and the core wire can be cut so as not to cut.

When the coated electric wire 1 to be processed is thick, the cutting of the cutting tool 25 is small and the coating can be cut, so that the rotation speed of the hollow rotary shaft 21 may be low. When the coated wire 1 to be processed becomes thin, it is necessary to increase the rotation speed of the rotating shaft 21 in order to increase the movement of the blade 25. Since the balance of the rotary pendulum 24 is originally lost, the load on the bearing 3a increases as the number of rotations increases. If the mass of the side with the larger mass of the rotary pendulum 24 is further increased, even in the case of the thin coated wire 1 to be processed, the coating can be cut without increasing the rotation speed so much.
The durability of the bearing 3a can be improved. The relationship between the wire diameter of the covered wire 1 to be processed and the rotation speed is adjusted by attaching and detaching the weight adjusting nut 26.

After maintaining the set maximum rotation speed of the motor 31 for several seconds, when the rotation speed is reduced, the urging force of the spring 29 becomes stronger than the centrifugal force, and the blade 25 is separated from the covered electric wire 1. In this state, the gripper 6 gripping the insulated wire 1 is stretched and moved by a predetermined dimension, the gripper 6 is released and returned to the original position, the insulated wire 1 is gripped, and the next cut is made. At this time, the rotating plate 22 and the blade 25 maintain the low-speed rotation state. The setting of the number of rotations of the motor 31 and the maintenance time are performed by the control unit 4. Since a vertical cut by the vertical cutting blade 7 in the previous step is previously inserted into the portion corresponding to the exposed position of the core wire of the coated electric wire 1 from above and below, the coating is split into two, and the core wire separates from the coated electric wire 1 and the core wire is separated. Will be exposed. Vertical cut or blade 25
The remaining coating due to inadequate cutting of the surroundings can be released from the remaining coating by passing through the bending formed by the coating removing roller 10 when the gripper 6 pulls and moves.

Embodiment 2 FIG. In the first embodiment, since the setting and the maintenance time of the maximum number of rotations of the motor 31 are fixed values, the coating is not applied even through the coating removing roller 10 due to the change in the toughness of the coating and the deterioration of the sharpness due to the wear of the blade 25. Remains may occur. In Embodiment 2, the toughness of the coating and the cutting tool 2
Provided is a control method which is not affected by the sharpness of No. 5 and does not damage the core wire by cutting the coating.

FIG. 5 is a control flow chart of sheath cutting for explaining the second embodiment of the present invention, and FIG. 6 is a diagram showing a relationship between conduction between a core wire and a blade and a motor rotation speed. Hollow rotating shaft 2
The gripper 6 grips the insulated wire 1 inserted into the hollow portion 1 and the motor 31 is rotated in a state where the back tension device 9 tensions the insulated wire 1 with an appropriate tension. When the rotation speed of the motor 31 is gradually increased, the blade 25 cuts into the coating, and the blade 25
Contacts the core wire. This is detected by the presence or absence of conduction between the conductive piece 6a and the current collector 34. The contact with the core wire due to the biting of the blade 25 into the coating is initially a point contact due to the position of the coated electric wire 1 and the difference in the roundness of the core wire. Therefore, the conduction between the conductive piece 6a and the current collector 34 is detected at intervals. And
When the coating on the entire circumference is cut, continuous conduction is achieved.

Control by the control unit 4 utilizing this relationship will be described. First, when the first conduction is detected, the rotation increase of the motor 31 is switched to a slight increase, and the counting of the cutting time T is started. Then, one continuous conduction time t is monitored. The conduction time t continues for a predetermined time corresponding to one rotation from the number of rotations of the motor 31, thereby detecting that the coating of the entire circumference has been cut off, decelerating the motor 31 and separating the blade 25 from the coated electric wire 1. Then, the process moves to the next position. Separately, an increase in the time from the start of measuring the cutting time T to the detection of cutting of the entire circumference of the coating is a detection of a decrease in the sharpness of the blade 25, and the cutting time T is set in advance. When the set time is exceeded, a blade wear alarm is output. When there is a blade wear alarm, the blade 25 is a commercially available circular cutter, so that the sharpness can be updated by rotating the cutting blade in contact with the covered electric wire 1.

As described above, the core wire of the insulated wire 1 and the blade 2
5 is detected by electrical conduction, the rotation of the motor 31 is slightly increased from the time of contact between the blade 25 and the core wire, the cutting force of the blade 25 is suppressed, and the entire circumference is covered by monitoring the continuous conduction time. Since it can be confirmed that the core wire is cut, the coating of the coated electric wire 1 can be cut more reliably, and the core wire can be made to have a force relationship that cannot be cut.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a coating stripping apparatus according to a first embodiment of the present invention.

FIG. 2 is a side view of the coating peeling mechanism of the present invention.

FIG. 3 is a left front view of the coating stripping mechanism of the present invention in a stationary state.

FIG. 4 is a left front view of the operating state of the coating stripping mechanism of the present invention.

FIG. 5 is a control flow chart of coating cutting for explaining Embodiment 2 of the present invention.

FIG. 6 is a diagram showing a relationship between conduction between a core wire and a blade and motor rotation speed.

FIG. 7 is a diagram in which an insulating coating is peeled off at a predetermined interval in the middle while a conventional coated electric wire is kept continuous.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Insulated wire, 1a core wire exposed part, 2 is a coating peeling mechanism 4 Control part, 6 Gripper, 6a Conductive piece,
7 vertical cutting blade 10 coating removing roller, 21 hollow rotary shaft, 2
2 rotating plate 23 support shaft, 24 rotating pendulum, 25 blades,
27 support 28 electric wire receiver, 29 spring, 30 blade stopper 31 motor, 33 current collecting ring, 34 current collecting

Continuation of front page (72) Inventor Koji Nagayasu 1-8, Midoricho, Fukuyama-shi, Hiroshima F-term (reference) 5G353 AB03 AC01 DA08

Claims (6)

[Claims] 1. A hollow rotary shaft through which a coated electric wire to be processed passes through a hollow shaft, a support shaft provided at a position other than the rotary axis of a rotary end face connected to the hollow rotary shaft, and a substantially L-shaped shaft. And the bent portion is pivotally supported by the support shaft so that each of the L-shaped
When the sides with different masses move differently and the side with the larger mass moves outward, the side with the smaller mass has the rotating pendulum close to the rotation axis and the tip of the smaller mass in the direction orthogonal to the coated wire. An insulated stripping apparatus for an insulated wire, comprising: a provided blade; and a rotation speed changing unit that changes a rotation speed of the hollow rotary shaft. 2. The apparatus according to claim 1, further comprising a longitudinal cutting blade for cutting a longitudinal direction of the coated electric wire at a position where the coated electric wire is separated. 3. An apparatus for stripping a covered electric wire according to claim 1, further comprising means for adjusting the side mass of the substantially L-shaped rotary pendulum. 4. An apparatus for stripping a covered electric wire according to claim 1, further comprising a coating removing means for bending the cut portion of the coated electric wire to separate the coating. 5. A means for electrically connecting the core wire of the covered electric wire and a means for electrically connecting the core wire of the covered electric wire, and the electric conduction between the core wire of the covered electric wire and the blade when the rotation speed of the hollow rotary shaft is increased. When detecting, the rotation of the hollow rotary shaft is slightly increased in speed, and when the electric conduction time reaches a time corresponding to one rotation of the hollow rotary shaft, the rotation of the hollow rotary shaft is reduced. The apparatus for stripping a coated electric wire according to any one of claims 1 to 4. 6. A blade wear alarm is output when the elapsed time from the initial detection of electrical continuity between the core wire of the coated electric wire and the blade to the start of deceleration of the hollow rotary shaft exceeds a predetermined time. The apparatus for stripping a covered electric wire according to claim 5, wherein: