JP2003032827A - Method and apparatus for processing terminal of shielded cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive and small-sized terminal processing apparatus wherein the stripping length is automatically changed when a braided shield exposed at an end of a high-voltage shielded cable is stripped off. SOLUTION: A positioning pin 4 for cable ends is installed in a braid opening pipe 1 provided with a mail edge on the periphery of the tip thereof, and the position of the pin 4 is changed by an actuator 5. When a shielded cable A is manually pushed in to drive the pipe 1 into the braided shield (b), the amount of driving-in is varied by changing the pin position, and thus the length of excessive portion of the braided shield stripped off is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a terminal of a high-voltage shielded cable, and more specifically, a braided shield stripped off at a cable end, which is stripped by an inexpensive mechanism to automatically switch the stripping length. Method and apparatus.

[0002]

2. Description of the Related Art In the terminal processing of high voltage shielded cables,
After stripping the outer skin of the cable end for a specified length, cut off the excess length of the exposed braided shield.

The stripping length of the braided shield and the stripping length of the insulated wire vary depending on the product specifications. Therefore, the terminal processing device for stripping off the braided shield can cope with changes in the product specifications from the viewpoint of facility cost reduction. Is desired.

Among the devices that the applicants have already proposed, there are devices that meet the demand. The device positions the cable by abutting the cable end against the positioning pin, and in this state, the cable is centered and held at the processing center. After that, the cable is transferred from the positioning station to the processing station, where the tip of the braided shield is opened by tapping from the outside with an opening claw, and then a cylindrical braid opening pipe is set inside the exposed braided shield. Insert it to the position, and rub the annular female blade (inner blade) inserted in the outer circumference of the cable in advance with the circular male blade (outer blade) provided on the outer circumference of the end of the braided open pipe to remove the extra length of the braided shield. Cut into slices.

This device adjusts the position of the positioning pin based on a control program, and the displacement of the pin changes the amount of penetration of the braid opening pipe to change the stripping length of the braided shield.

[0006]

The above-mentioned device for controlling the position of the positioning pin based on the control program is such that an expensive drive source such as a servo motor, a high-performance expensive control device, a plurality of processing stations and cables are used. A transfer device is needed to feed the station from the former stage to the latter station, and it is inevitable that the price and size will increase.

Further, since the expansion of the end of the braided shield and the penetration of the braid opening pipe are carried out mechanically, the expansion of the end of the braided shield occurs, or the end of the cable hangs down to open the braid. Occasionally, there is a problem in that the pipe does not squeeze well between the braided shield and the insulated wire inside, and it was difficult to eliminate the interruption of processing due to the problem.

The present invention seeks to provide a method and apparatus capable of overcoming such problems.

[0009]

In order to solve the above-mentioned problems, according to the present invention, a positioning pin for abutting a cable end is provided on the inside of a braid expansion pipe, and the positioning pin is pushed and pulled by an actuator. The shielded cable to the position where the cable end is positioned by the positioning pin, and push the braided cable manually into the pipe to set the cable on the fixing jig, and then move the female blade together with the fixing jig. Then, take the method of cutting the braided shield.

In order to carry out this method, a positioning pin for abutting the cable end is provided inside the braid spreading pipe, and the positioning pin is pushed and pulled to move to either the stroke start end or the stroke end. (EN) Provided is a terminal processing device provided with one actuator and a second actuator that allows a positioning pin including the first actuator to escape from a positioning point.

In this apparatus, when a plurality of first actuators having different strokes are connected in series and provided, the number of positions for switching the position of the positioning pin increases.

Further, the sensor unit described in the section of the embodiment, a stopper for finely adjusting the end point of extrusion of the sensor unit, a scraper for pushing out the braided shield cutting scraps left on the braided open pipe, an inlet of the braided open pipe It is more preferable to provide a centering chuck or the like for positioning the shielded cable at the processing center in the vicinity.

It is also preferable that the female blade is divided into left and right and opened and closed by an opening and closing drive mechanism, or the braid opening pipe and the female blade are exchanged according to the cable size.

[0014]

The position of the positioning pin can be switched by a simple, inexpensive air cylinder or the like, and this switching changes the amount of penetration of the braid opening pipe and the stripping length of the braided shield. Therefore, an expensive drive source capable of stroke control and an expensive control device for performing control based on a program are not required.

Further, since the positioning station for the cable end and the stripping station for the braided shield are integrated, a cable conveying device is not required, which enables cost reduction and size reduction of the device.

In the case where a plurality of first actuators having different strokes are connected in series and provided, the number of strippable lengths that can be changed increases, and the same device can be used for more types.

The description of the other preferred configurations, and their actions and effects will be given in the next section.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a plan view showing an outline of the entire terminal processing apparatus, and FIG. 2 is a side view.

This terminal processing apparatus has a cylindrical braided open pipe 1 having an annular male blade 2 (see FIG. 7) provided on the outer circumference of the tip.
An annular female blade 3 for cutting the braided shield by rubbing it against the male blade 2, a positioning pin 4 inserted in the braid opening pipe 1, and a first actuator 5 for switching the position of the pin Cylinder) and this actuator 5, including positioning pin 4 when cutting the braided shield
Releasing mechanism 6 for releasing, fixed jig 7 for centering the shielded cable after setting with air chuck 7a and holding it at the processing center, and positioning the tip end of the shielded cable near the processing center near the tip of braided open pipe 1. The centering chuck 8, the cutting drive mechanism 9 shown in FIGS. 2 and 5, and the scrap removing mechanism 10 shown in FIGS. 2 and 4 are main components.

As shown in FIG. 4, the braid opening pipe 1 is
It is attached to the holder block 11.

The female blade 3 is divided into two parts, left and right, as shown in FIG. This divided female blade is used as a pair of opposed hydraulic cylinders 1.
2a and a slider 12b that pushes and pulls with each cylinder,
A slider 12b (a holder on the slider) of a drive mechanism 12 including a linear way 12c that guides the slider.
It is attached to and is opened and closed by the drive mechanism 12.

As shown in FIG. 4, the positioning pin 4 is supported by a bushing 13 incorporated in the holder block 11 so as to be slidable in the longitudinal direction.
The sensor unit 14 is provided between the output shaft of the actuator 5 and the tip of the output shaft.

The sensor unit 14 includes a linear way 15
An outer frame 14a to be guided to, a movable element 14b fixed to the rear end of the positioning pin 4 so as to allow the movement of st in the outer frame 14a, and a spring 14c for applying a restoring force to the movable element. , And a photo sensor 14d that detects that the mover 14b has moved to the positioning end point.

The holder block 11 is provided with a stopper bolt 16 which determines the forward end point of the sensor unit 14.

The escape mechanism 6 has a second actuator (also an air cylinder) 6a attached to a frame 6b (which is connected to the holder block 11) and is guided to the linear way 15 by the second actuator 6a. The driven first actuator 5 is pulled.

As shown in FIG. 5, the female blade 3, the fixing jig 7 and the centering chuck 8 are provided on a slide plate 9c guided by a linear way 9b. The cutting drive mechanism 9 moves the slide plate 9c by the hydraulic cylinder 9a, so that the cable set on the fixing jig 7 moves together with the female blade 3 when the braided shield is cut. The escape mechanism 6 so as not to hinder the cable movement at that time.
However, it is possible, though not preferable, to fix the cable and move only the female blade 3, for which the relief mechanism 6 is not necessary.

The scrap removing mechanism 10 includes an air cylinder 10a for moving the holder block 11 together with the elements on the frame 6b, a linear way 10b for guiding the movement of the holder block, and a stopper 10c for stopping the holder block 11 at the return point. , A fixed position scrap scraper 10d that is loosely fitted on the braid opening pipe 1.

In the terminal processing apparatus configured as described above, the shield cable A (see FIG. 4) which has been subjected to the outer skin stripping of the terminal and the manual expansion processing of the exposed braided shield tip is set in the apparatus. .

When the cable A is pushed to the left in FIG. 4 by loosely grasping the vicinity of the cable end with the centering chuck 8 shown in detail in FIG. 6 and positioning it coaxially with the pipe 1, the insulated wire c of the cable is braided. The pipe 1 enters the open pipe 1, and the pipe 1 enters the inside of the braided shield b. Then, the centering chuck 8 is opened, and the cable A is further pushed to the position where it is positioned by the pin 4, and the pipe 1 is also inserted near the cutting point of the braided shield b.

When the positioning pin 4 is pushed by the cable A and retracts to the position shown by the solid line in FIG. 4 by the work, a detection signal flows from the photosensor 14d, and the air chuck 7a in FIGS. 2 and 5 grips the outer sheath a of the cable. The cable setting for the fixing jig 7 is completed.

A switch (not shown) is activated at the set completion point, the relief mechanism 6 and the cutting drive mechanism 9 are driven based on the activation signal of the switch, and the positioning pin 4 is moved.
The braided shield is cut (see FIG. 7) by moving the female blade while letting it escape.

Further, when the cutting is completed, the holder block 11 is pulled in by the air cylinder 10a, the braid opening pipe 1 is retracted, and the braided shield cutting waste on the pipe is removed by the scraper 10d as shown in FIG. It is pushed out and dropped into the waste box 18 arranged below the rectangular tube 17 in FIG. 2 to be collected.

When the locating pin 4 is placed in the forward position and the above work is carried out, the cable end is treated as in the pattern I of FIG. 9, while the locating pin 4 is placed in the retracted position and the braided shield is stripped. The cable end is treated as shown in pattern II of FIG. These patterns I and II are
It is automatically changed by switching the pin position by the first actuator 5.

If, for example, two first actuators having different strokes are connected in series, the two first actuators are pushed out together. Only one of the first actuators is pushed out. Push out only the other actuator. Pull back the two first actuators together. It is possible to change the stripping pattern in four ways by selecting the operation mode.

A braided open pipe 1 having a male blade 2
The female blade 3 and the scrap removing tool 10d are both replaceable, and the cable size can be changed by exchanging these with a tool suitable for the cable size.

In addition, when the sensor unit 14 is provided, a cable setting error is prevented and a defective product due to a setting error is eliminated.

Further, when the stopper bolt 16 is provided, the screwing amount of the bolt can be changed to finely adjust the positioning point by the positioning pin 4, and the first actuator 5 is not required to have a stroke adjusting function, so that an inexpensive air cylinder or the like can be obtained. Is allowed to be used.

The centering chuck 8 makes the insertion of the insulated wire into the braided open pipe 1 accurate, and improves the workability in setting the cable.

Further, if the female blade 3 is divided into two and opened, it does not become an obstacle when setting the cable, which also improves the workability when setting.

The scrap removal mechanism 10 reliably pushes off the cutting scraps on the braided open pipe, eliminating the need for manual scrap removal.

As described above, the apparatus of the present invention manually expands the tip of the braided shield and sets the cable while inserting the braided open pipe, but this method causes poor expansion of the tip of the braided shield. Defects in the braided open pipe do not occur, and production efficiency is improved rather than a fully automated device for small-quantity, high-mix production.

[0043]

As described above, according to the terminal processing method and apparatus of the present invention, the positioning pin is arranged in the braid opening pipe, and the position of the pin is switched by a simple actuator to strip the braiding shield. Since the length is changed, expensive elements are not required, and the processing station can be integrated into one unit, resulting in cost reduction and downsizing of the equipment, which is advantageous in terms of equipment cost and equipment space.

Further, since the expansion of the end of the braided shield and the penetration of the braid opening pipe (pushing in of the cable) are performed manually, the operation troubles and processing defects of the device due to the expansion failure and the penetration failure are reduced, and the production is reduced. Properties and product yields are also improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an overview of an entire terminal processing device according to an embodiment.

FIG. 2 is a side view of the main part of the same device.

FIG. 3 is an end view of a portion along line III-III in FIG.

FIG. 4 is a partially cutaway side view showing an enlarged main part of the apparatus.

FIG. 5 is a vertical sectional view showing details of a cutting drive mechanism.

FIG. 6 is an end view of the centering chuck.

FIG. 7 is a view showing a cutting state of a braided shield with a male blade and a female blade.

FIG. 8 is a diagram showing a scrap removal state by a scrap removal mechanism.

FIG. 9 is a diagram showing a relationship between a position switching state of a positioning pin and a processing pattern of a terminal.

[Explanation of symbols]

1 braided open pipe 2 male blade 3 female blade 4 Positioning pin 5 First actuator 6 escape mechanism 6a Second actuator 7 Fixing jig 7a Air cylinder 8 Centering chuck 9 Cutting drive mechanism 9a hydraulic cylinder 9c slide plate 10 Scrap removal mechanism 10a air cylinder 10d scraper 11 Holder block 12 Female blade opening / closing mechanism 14 Sensor unit 14d photo sensor 15 Linear Way 16 Stopper bolt 17 Shooter 18 waste bin A shielded cable a skin b braided shield c insulated wire

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshiaki Suzuki             1-7-10 Kikuzumi, Minami-ku, Nagoya-shi Stock Association             Auto Network Technology Laboratory F term (reference) 5E063 CB05 CB06 CD15 CD25 XA05                       XA20                 5G353 AB07 AC01 AC06 CA02 DA02                       EA01 EA09                 5G355 AA10 BA04 BA08 CA04 CA05

Claims (9)

[Claims] 1. A cylindrical braid expansion pipe is inserted into the inside of the braided shield stripped off at the end of the shielded cable, and then provided on the outer peripheral edge of the annular female blade and the braid expansion pipe surrounding the cable. In the terminal processing method of the shielded cable that cuts the excess length of the exposed braided shield by rubbing the circular male blade into a sliced state, a positioning pin that abuts the cable end inside the braid expansion pipe is provided, and the positioning pin is used. Push and pull with the actuator to selectively switch the pin position, expand the braided shield cable until the cable end is positioned on the positioning pin, and push it into the pipe by hand to set the cable on the fixing jig. The end of the shielded cable is characterized in that the braided shield is cut by moving the female blade together with the fixing jig. Construction method. 2. A cylindrical braid expansion pipe is inserted into the inside of the braided shield stripped off at the end portion of the shielded cable, and thereafter, the circular female blade surrounding the cable and the tip outer periphery of the braid expansion pipe are provided. In a shielded cable terminal processing device that cuts the excess length of the exposed braided shield by rubbing a circular male blade into a sliced state, a positioning pin that abuts the cable end inside the braid expansion pipe is provided, and further positioning A first actuator that pushes and pulls the pin to move it to either the stroke start end or the stroke end, and a second actuator that includes this first actuator and allows the positioning pin to escape from the positioning point are provided. Manually extend the shielded cable to the pipe until the cable end is positioned and braided It is characterized in that the cable is pushed in to set the cable on the fixing jig, and then the female blade is moved by the cutting drive mechanism together with the fixing jig while releasing the first actuator and the positioning pin to cut the braided shield. Terminal processing device for shielded cables. 3. The terminal processing apparatus for a shielded cable according to claim 2, wherein a plurality of first actuators having different strokes are connected in series and provided. 4. A slidable holder connected to an output shaft of a first actuator, a mover assembled to the holder so as to allow a predetermined relative movement in the longitudinal direction, and fixed to a rear portion of a positioning pin. A sensor unit including a spring that applies a restoring force to the mover and a sensor that detects that the mover compresses the spring and pushes it to the positioning end point is provided, and the fixing jig is based on the detection signal of the sensor. The terminal processing device for a shielded cable according to claim 2 or 3, wherein the cable is held by the method. 5. The terminal processing device for a shielded cable according to claim 4, further comprising a stopper having an adjusting function for finely adjusting a pushing-out end point position of the sensor unit. 6. A scraping-off mechanism for pushing back the braided shield cutting scraps on the braided open pipe with a position-fixed scraper that is loosely fitted to the base side of the pipe after the braided shield is cut and the braided open pipe is retracted. The terminal processing device for a shielded cable according to any one of claims 2 to 5. 7. The terminal processing apparatus for a shielded cable according to claim 2, further comprising a centering chuck for positioning the shielded cable at the processing center near the entrance of the braided open pipe. 8. The terminal processing device for a shielded cable according to claim 2, wherein the female blade is divided into left and right parts and opened and closed by an opening and closing drive mechanism. 9. The terminal processing device for a shielded cable according to claim 2, wherein the braided open pipe and the female blade can be replaced according to the cable size.