JPH0359650B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a method for cutting and stripping a coating in an automatic cutting and stripping device for coated wires used in various electrical devices.

(Prior Art) Generally, coated wires for wiring used in electronic and electrical products are used after the following processing. That is, as shown in FIG. 8, the length L1 of the covered wire 1,
The length L2 of the sheathing 3 and the stripped lengths L3 and L4 of the sheathing 3 (exposed length of the core wire 2) are processed according to the respective specified dimensions.

In recent years, with the increasing and diversifying demand for electronic and electrical products, a device for cutting and stripping the covered wire 1 described above is used to clamp a continuous coated wire R against a guide support rod 4 as shown in FIG. The conveying members 5 and 6 are attached, and on the other hand, the cutting member 7 and the covering cutting members 8 and 9 are provided corresponding to the covered electric wire R, and while the clamp conveying members 5 and 6 are linearly reciprocated, the cutting member 7 and the covering are cut. There was one in which the cutting members 8 and 9 were operated based on a preset operation command from a computer.

(Problems to be Solved by the Invention) However, in this automatic wire cutting/stripping device, when the cutting length L1 of the coated wire R becomes long, it is necessary to reciprocate the clamp conveying members 5 and 6 multiple times. There were problems that not only the efficiency decreased, but also the structure was complicated and the device became large.

In order to solve this problem, the applicant has recently
a feeding/pull-back mechanism equipped with a pair of rollers for feeding/pull-back the covered electric wire by forward and reverse rotation;
a cutting/slitting mechanism comprising a pair of cutting blades for cutting the insulated wire and notching the sheath; and a cutting blade of the cutting/slitting mechanism that controls forward and reverse rotation of the roller of the feed/pull-back mechanism. We have proposed an automatic wire cutting/stripping device comprising an operation control device equipped with an operation control computer that selectively controls the electric wire at two positions: the cutting position of the sheathing and the cutting position. (Special application 1984-
(Refer to No. 60132 (Japanese Patent Publication No. 1-25283)) However, this device simply cuts the cutting blade into the sheath at the stage of forming an incision in the sheath of the insulated wire and stripping it off, and then cuts the insulated wire as it is. Since the core wire was pulled back by a roller, the cutting edge of the cutting blade may get stuck in the core wire and be stripped, causing scratches on the surface if the core wire is a solid wire, and cutting the bare wire if it is a stranded wire. A new problem arose.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention moves the cutting blade of an automatic sheathed wire cutting/stripping device from the retracted position to the cutting position to cut the sheath of the sheathed wire. A method is adopted in which a cut is formed, the cutting blade is once moved backward within a range where the blade part covers the coating, and then the core wire and the coating are moved relative to each other to strip the coating on the core wire. There is.

(Function) By adopting the above-mentioned means, the present invention functions as follows.

When the cutting blade reaches the surface of the core wire while biting into the coating, the cutting blade is stopped and the cutting into the coating is completed. Thereafter, when the blade part is moved from the cutting position to the non-interference position, the blade part is separated from the surface of the core wire, and in this state, when the covered wire is pulled back by the feeding/pull-back mechanism,
Since the coating is stopped by the blade, only the core wire is pulled back and the coating is stripped off. thus,
Since the coating is cut and stripped, the core wire is not damaged.

(Example) Hereinafter, an example embodying the present invention is shown in Figs.
This will be explained based on FIGS. 9a to 9c.

The wire cutting/stripping device used in the sheath cutting/stripping method of this embodiment is generally equipped with a pair of rollers 20 and 21 for continuously feeding and pulling back the sheathed wire R by forward and reverse rotation. The feeding/retracting mechanism 12 and both rollers 2
0, 21 (on the right side in FIG. 1), a cutting/slitting mechanism 44 for cutting the coated wire R and cutting the sheath 3;
and an operation control device 60 equipped with an operation control computer.

Therefore, among the above-mentioned mechanisms, the feeding/retracting mechanism 12 for the covered electric wire R will be explained based on FIGS. It is fixed in an upright position. A pair of upper and lower bearings 14 and 15 are attached to the outer surface of the mounting plate 13, one end of the upper bearing 14 is supported by a support shaft 16 so as to be rotatable in the vertical direction, and both ends of the lower bearing 15 are It is fixed to the mounting plate 13 with bolts 17. A pair of upper and lower rollers 20 and 21 are supported by the bearings 14 and 15 via rotating shafts 18 and 19 so as to be actively rotatable. Further, a movable support shaft 22 is supported through the other end of the bearing 14, and a mounting bracket 2 is hung between the support shaft 22 and the upper end of the mounting plate 13.
A coil spring 24 is interposed between the
The upper roller 20 is urged toward the lower roller 21. Note that an operating knob 25 is attached to the mounting bracket 23 so that the elasticity of the coil spring 24 can be adjusted. Also, the mounting plate 13
A lifting lever 27 for lifting the movable support shaft 22 is rotatably supported by a support pin 26 . And the lifting lever 27
When rotated in the direction of the arrow in FIG. 1, the bearing 14, rotation shaft 18, roller 20, support shaft 22, etc. are lifted upwards about the support shaft 16 against the elasticity of the coil spring 24. ing.

As shown in FIG. 2, a pulse motor 28 is fixed on the upper surface of the horizontal support plate 11, and its output shaft 29
Driving sprocket wheels 30, 31 are fitted on the rotating shafts 18, 19, driven sprocket wheels 32, 33 are fitted on the rotating shafts 18, 19, and a chain 34 is hung on both sprocket wheels 30, 32. has been done. Further, a bracket 35 is erected on the upper surface of the horizontal support plate 11, and idler rollers 36 and 37 are rotatably supported at two positions above and below the bracket 35, and both idler rollers 36 and 37 and the driving and driven sprockets are A chain 38 is attached to the wheels 31 and 33 as shown in FIG. 4, and when the output shaft 29 of the pulse motor 28 is rotated clockwise in FIG. 4, the upper roller 20 is rotated clockwise. In addition, the lower roller 21 is rotated counterclockwise.

As shown in FIG. 1, a bracket 39 is supported horizontally on the outer surface of the mounting plate 13 on the side of the rollers 20 and 21, and a bracket 39 is provided on the upper surface of the bracket 39 for guiding the covered electric wire R between the rollers 20 and 21. Transfer pipe 40
is supported horizontally. Further, a notch 40a is provided in the intermediate portion of the transfer pipe 40, and the notch 40a
A limit switch LS for detecting the presence or absence of the covered electric wire R is attached corresponding to a. A bracket 41 is erected on the upper surface of the horizontal support plate 11 as shown in FIG.
A transfer pipe 42 for transferring the electric wire to the electric wire cutting/slitting mechanism 44, which will be described later, is supported horizontally.

Next, the cutting/slitting mechanism 44, which is installed in front of the feeding/pull-back mechanism 12 and cuts the coated wire R and cuts the sheath 3, will be described with reference to FIGS. 1 to 3 and 5.

As shown in FIG. 5, a holder 46 is erected on the upper surface of the horizontal support plate 11 via a mounting block 45, and a fixed cutting blade 47 is accommodated and fixed in an accommodation groove 46a formed on one side of the holder 46. A V-shaped blade portion 47a is formed at the upper end of the cutting blade 47.
Further, a guide member 48 is provided on one side of the holder 46.
is fixed, and the movable cutting blade 4 is fixed between the holder 46 and the movable cutting blade 4.
9 is supported so as to be able to reciprocate in the vertical direction, and an inverted V-shaped blade portion 49a is formed at its lower end. A shutter 50 is provided on both sides of the cutting blades 47 and 49, so that the cut and stripped product (covered wire 1) and the cut end 3a of the sheath 3 can be recovered.

On the other hand, a mounting frame 51 is erected on the horizontal support board 11, and a rack 52 is held on the mounting frame 51 so as to be able to reciprocate vertically via a sliding guide member (not shown). The upper end of the movable cutting blade 49 is connected to the lower end of the movable cutting blade 52 by a bolt 53. Further, a pulse motor 54 capable of forward and reverse rotation is attached to the mounting frame 51, and a gear 56 is fixed to its output shaft 55. Similarly, the mounting frame 51 has a pinion 5 that engages with the rack 52.
7 is supported by a support shaft 58, and a gear 59 that meshes with the gear 56 is fixed to the support shaft 58.

Therefore, when the pulse motor 54 is now rotated forward, the output shaft 55, gears 56, 59, and pinion 5
7 and rack 52, the movable cutting blade 49 is moved towards the fixed cutting blade 47. The vertical movement amount of the movable cutting blade 49, that is, the rotation speed of the pulse motor 54, is set by a cutting depth setting display 69 and a non-interference position setting display 70 of the operation control device 60, which will be described later. The coating 3 is cut in each step of cutting and peeling work, and the blade portions 47a, 49a of the cutting blades 47, 49 are
from the core wire 2.

Next, the above-mentioned feeding/retracting mechanism 12,
and outputs various operation signals to the cutting/notching mechanism 44 based on a preset program,
Alternatively, an operation control device 60 that outputs an operation signal based on a newly set setting signal will be described with reference to FIG.

The pulse motors 28, 54 and limit switch LS are each connected to a computer 62 via a lead wire 61. Further, the computer 62 is connected to the operation box 6 by a lead wire 63.
Connected to 4.

A digital switch type length setting display 65 is provided on the surface of the operation box 64 for setting and displaying the cutting length L1 of the covered wire 1. Further, on the right side of the length setting display 65, there is provided a number setting display 66 of a digital switch type for setting and displaying the number of cut pieces of the covered electric wire 1. Approximately in the center of the operation box 64 are provided tip and rear end stripping length setting displays 67 and 68 for setting and displaying stripping lengths L3 and L4 of the sheathing 3 at both front and rear ends of the cut insulated wire 1. It is being

Further, as shown in FIG. 9b, the operation box 64 displays a position where the blade 49a of the movable cutting blade 49 has advanced (moved downward) by a predetermined distance l1 from the retracted position H to cut into the coating 3. H1, and move the blade portion 49a a predetermined distance l2 from the cutting position H1.
A cut position setting display 69 and a non-interference position for setting and displaying a non-interference position H2 where the core wire 2 and the blade part 49a do not interfere by retracting (upward movement) by (a distance that the blade part 49a does not come off from the coating 3) and the core wire 2 and the blade part 49a do not interfere with each other. A settings display 70 is provided.

There is a start switch on the bottom of the operation box 64.
SW1, a stop switch SW2, a feed switch SW3, and a feed back switch SW4 are provided. Also, a number indicator 71 for displaying the number of covered wires 1 that have actually been cut;
A switch SW5 for performing the display operation of 1, a reset switch SW6, and a switch SW7 for subtracting the count number when a cutting error occurs are provided.

Next, the operation of the automatic wire cutting/stripping apparatus constructed as described above will be explained with reference to FIGS. 7a to 7f.

First, before cutting and stripping the insulated wire R, the insulated wire R is unwound from a winding drum (not shown) and the feed switch SW3 of the operation box 64 is turned on.
is turned on, and while rotating the rollers 20 and 21 in the normal direction (see arrows) as shown in FIG.
is inserted into the transfer tube 40 and fed between the rotating rollers 20 and 21, the coated wire R is moved into the transfer tube 42, and the blade portions 47a of the fixed and movable cutting blades 47 and 49 are , 49a. (See FIG. 9a) When the tip of the coated wire R is moved from the cutting blades 47, 49 to a state where it slightly protrudes as shown by the solid line in FIG. 7a, the feed switch SW3 is turned off and the roller 20 , 21 are stopped.

In this state, the length setting display 65 of the covered electric wire 1 is operated to set and display the cutting length L1, the number setting display 66 is operated to set and display the number of pieces to be cut, and the first and second Operate the stripping length setting display devices 67 and 68 to set and display the stripping lengths L3 and L4 of the sheathing 3 at the tip of the cut wire 1 (in this example, the case where L3=L4 is described), respectively. do. Furthermore, considering the diameter D of the core wire 2 of the covered wire R and the wall thickness t of the covering 3,
The cut position setting display 69 sets the cut position H1 into the coating 3, and the non-interference position setting display 70 sets the non-interference position H2.

When the start switch SW1 is turned on in this state, the covered electric wire R is automatically cut and stripped in the following manner.

That is, the movable cutting blade 49 is connected to the pulse motor 54.
The movable cutting blade 49 is moved downward as shown by the two-dot chain line in FIG.
is immediately returned to the retracted position shown by the solid line in Figure a.

Next, the rollers 20 and 21 are rotated in the normal direction, and the coated wire R is moved a predetermined distance from the cutting blades 47 and 49 as shown in FIG.
(L3+L4) and then stopped. In this state, the pulse motor 54 is rotated forward and the movable cutting blade 49 is at the position shown by the two-dot chain line in the figure.
That is, it moves to a position H1 where a cut is made in the sheath 3 of the covered wire R and then stops. As shown in FIG. 9b, this position is where the blade parts 47a, 49a of the cutting blades 47, 49 come into contact with the outer surface of the core wire 2, but this positional relationship is not necessarily accurate; There may be slight differences due to dimensional errors and slight variations in the cutting position of the cutting blade 49. Therefore, the blade parts 47a and 49a cut into the core wire 2 or stop at a position away from the core wire 2. Therefore, in this embodiment, the coating 3 is removed in the following manner while the blade portions 47a, 49a are not in contact with the core wire 2. That is, the motor 54 is reversed a predetermined number of times, and the cutting blade 49 is moved from the cutting position H1 shown in FIG. 9b to the non-interference position H2 shown in FIG. Ru. At this time, the blade portion 49a is
It is stopped in a position where it cannot be disengaged from.

Next, the rollers 20 and 21 are reversed as shown in FIG.
4) When sent back, the cut end 3a of the sheath 3 falls off from the tip of the covered wire R, and the tip of the covered wire R is stripped.

Furthermore, when the stripping operation at the tip of the covered wire R is completed, the movable cutting blade 49 is moved to the retracted position shown by the solid line in FIG. 7d, and then the roller 2
0 and 21 are rotated forward. When the covered electric wire R protrudes a predetermined distance L1 from both cutting blades 47 and 49 as shown in FIG. 4D, the pulse motor 54 is stopped and the electric wire R is stopped. In this state, the movable cutting blade 49 is moved down to the cutting position H1 of the coating 3, as shown by the two-dot chain line in the figure, and then stopped. Even after this, the pulse motor 54 rotates in reverse and the cutting blade 4
9a is moved from the cut position H1 to the non-interference position H2.

After that, as shown in FIG. 7e, both the rollers 2
0 and 21 are reversed, and the covered wire R is pulled back by a predetermined distance, that is, L4, and then stopped. At this time,
A peeled portion having a length L3 is formed at the tip of the covered electric wire R.

Finally, with the movable cutting blade 49 moved to the retracted position as shown by the solid line in FIG.
0 and 21 are rotated in the normal direction to feed the electric wire R a predetermined distance L4, and the movable cutting blade 49 is moved downward to cut the core wire 2. In this way, the cutting and stripping work of one coated wire 1 is completed.

Now, in the embodiment of the present invention, the cutting blade 49 is moved to the cutting position H1 and then retreated to the non-interference position H2, so that the blade parts 47a and 49a are not in contact with the core wire 2 or are biting into the coating 3. The cut end portion 3a is not removed, and therefore, damage to the core wire 2 is prevented. Moreover, peeling resistance is also reduced.

Note that the present invention can also be embodied in the following embodiments.

(1) In the embodiment described above, the pulse motors 28 and 54 were used as power sources for driving the rollers 20 and 21 and the movable cutting blade 49, but instead of these, a servo motor (not shown) or the like could be used. 21 or the moving amount of the movable cutting blade 49 can be numerically controlled by the computer 62.

(2) In the above embodiment, the coated wire 1 was cut and stripped.
The core wire 2 was exposed at both ends of the
Do this only on one side.

(3) Although the fixed cutting blade 47 and the movable cutting blade 49 were used in the above embodiment, the fixed cutting blade 47 should also be of a movable type.

(4) In the above embodiment, the V-shaped blade portions 47a, 49a
was used, but it can be made into any shape such as a semicircular arc or trapezoid.

Effects of the Invention As described in detail above, the present invention has the effect of being able to prevent damage to the core wire and to reduce the peeling resistance in the step of cutting and peeling the coating of the coated wire.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the automatic wire cutting/stripping device of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a roller FIG. 5 is a front view showing the cutting/slitting mechanism for the covered wire, FIG. 6 is a front view showing the operation control device, and FIGS. 7 a to 7 f are for cutting the covered wire.・A front view for explaining the stripping operation, FIG. 8 is a front view showing the cut covered wire, FIGS. 9 a to c are enlarged cross-sectional views showing the cutting process of the covered wire, and FIG. 10 is a conventional one. FIG. 2 is a front view showing an embodiment of the automatic wire cutting and stripping device of FIG. Covered wire...1, R, core wire...2, sheath...
3. Feeding/pull-out mechanism... 12. Roller...
...20, 21, Transfer pipe...40, 42, Cutting/notching mechanism...44, Fixed cutting blade...47, Movable cutting blade...49, Operation control device...60, Computer...62, Operation box... ...64, Length adjustment indicator...65, Number setting indicator...66, First and second peeling length setting indicator...67,6
8. Cut position setting indicator...69, Non-interference position setting indicator...70, Length of covered wire 1...L
1. Peeling length of coating 3...L3, L4.

Claims (1)

[Scope of Claims] 1. A cutting blade of an automatic coated wire cutting/stripping device is moved from a retracted position to a cutting position to form a cut in the coating of the coated wire, and here, the cutting blade is temporarily moved to the blade portion thereof. A method for cutting and stripping a coating in an automatic coating wire cutting and stripping device, characterized in that the wire is moved backward within a range where the coating is applied, and then the core wire and the coating are moved relative to each other to peel the coating on the core wire. 2. A cutting device equipped with a feeding/pull-back mechanism for feeding/pulling back the covered wire, and a pair of cutting blades installed in correspondence with the feeding/pull-back mechanism for cutting the covered wire and cutting into the coating.・In addition to controlling the feeding/pull-back operations of the cutting mechanism and the feeding/pull-back mechanism, the cutting blade of the cutting/cutting mechanism is separated from the retracted position, the coating cutting position, the cutting position, and the cutting position so as not to interfere with each other. In an automatic wire cutting/stripping device, the cutting blade is moved from a retracted position to a cutting position to cut the sheathed wire. Once a cut is formed in the coating and the cutting blade comes into contact with the surface of the core wire, the cutting blade is moved to a non-interfering position where it is separated from the core wire within the range where the blade part covers the coating, and then the covered wire is removed. 2. The method for cutting and stripping a coating in an automatic coated wire cutting and stripping apparatus according to claim 1, wherein the feeding/pull-back mechanism is operated to pull back the coating and remove the coating from the core wire. 3. The method for cutting and stripping a coating in an automatic coating wire cutting and stripping device according to claim 2, wherein the feed/pull-back mechanism is constituted by a pair of rollers that can rotate in forward and reverse directions. 4. The covered wire cutting/notching mechanism includes a fixed and movable cutting blade, and a mechanism for selectively switching the movable cutting blade to three positions: a covered wire cutting position, a covering cutting position, and a non-interference position. A method for cutting and stripping a coating in an automatic coating wire cutting and stripping device according to claim 2, characterized in that the automatic coating wire cutting and stripping device is constructed by a pulse motor or a servo motor that can be rotated in forward and reverse directions. 5 The operation box housing the operation control device includes a covered wire length setting display, a number setting display,
Cutting and stripping the coating in the automatic coating wire cutting and stripping device according to claim 2, which is provided with a coating peeling length setting indicator, a cutting depth setting display, and a non-interference position setting display. Method.