JPS5921208A - Method of cutting coating layer of cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention mainly relates to a sheath cutting method suitable for stripping work of electric wires and cables.

[Prior art]

As shown in Fig. 1, a conventional cable sheathing cutter has been used to sandwich a cable 3 between rollers 2 which are rotatably provided on the sheathing cutter body L.
/3, and move the motor 4, which has an output shaft perpendicular to the center line of the cable 3, in the vertical direction of the cutter main body IK [(J1 freely supports this), and attach the cape Iv3 to the output shaft of the motor 4. Fix the center of the front 5 and move the shifter motor 4 vertically using the adjustment; j?, Az) 6. %I, allow i clause ζ
A coated cutter is known.

When insulating layer 7 as a covering layer of cable 3 is turned on, adjust the adjustment bolt 6 to move the lower end of υ11-1 skewer blade 5 to core 8 of conductive V1 of cable 3:
The insulating layer 7 is cut by rotating the υ blade 5 by the motor 4 and moving the cutter body 1 along the cape A/3 while rolling the roller 2 at the same time.

However, in cape A/3, normally T8 is used for insulating layer 7.
is slightly eccentric. This eccentricity usually occurs accidentally during cable manufacturing, and the core 8 of the commercialized cape 1L/3 is covered with the insulating layer 7. It is difficult to know if it is eccentric.

Therefore, the conventional insulation layer cutting work was carried out by relying on the knowledge and experience of the first person, and the rotary blade 5 damaged the core 8 and the semiconductive layer (not shown), and the insulation layer was damaged. It was not possible to avoid the problem that the uncut portion of the layer 7 was too thick and it took time to remove the insulating layer 7.

[Disclosure of the invention]

In view of the above problems, the present invention makes it possible to always maintain the distance between the rotary blade and the core at a predetermined value during coating layer cutting work, thereby preventing damage to the core due to the rotating blade and leaving too much of the coating layer, thereby increasing work efficiency. The aim is to improve.

In order to achieve the above object, the present invention uses a dummy core equivalent to the core of the part required to cut the cable, and installs a dummy rotary blade equivalent to the rotary blade of the sheathing cutter on the dummy core.
Then, the rotating dummy rotary blades of the same coil are rotated in the same way, and an alternating current that generates the same magnetic field is applied to both cores. The dummy-side induced electromotive current generated in the coil in the dummy rotary blade is detected by setting the dummy rotary blade at intervals, and the dummy-side induced electromotive current and the induction generated when the rotary blade of the coating cutter rotates and cuts the coating layer are detected. From the comparison with the electromotive current, the coating layer is cut while controlling the position of the coating cutter so that a predetermined distance is always maintained between the rotary blade of the coating cutter and the core.

[One embodiment of the invention]

FIG. 2 is a conceptual diagram for explaining the coating layer cutting method according to the present invention, and shows a state in which the coating cutter has slightly advanced through the coating layer. The two rotary blades 12 and I3 of the sheathed cutter 11, which is attached to the cable lO having a conductive core 9 at its center and movable in the longitudinal direction, are connected to the cable lO with a conductive core 9 at the center.
An insulating layer 19 as a covering layer is placed between the upper and lower sides.
A dummy rotary blade of a dummy cutter 16 having the same shape and quality as the rotary blade 12 and 13 is attached to the core exposed portion 15 (dummy core) at the tip of the cape/L'lO, which has been removed by a small length (for example, about 20 to 301 mm). 17 was installed. −
f: Equivalent coils are cast into each rotary blade 12, 13, and 17, and the coils are connected to the current/voltage detection/comparison device 18.
It is connected to the. Both ends of the core 90 are connected to a separately provided AC power source 20 of several KHz.

In the above device, when a current is first applied to the core 9 from the power supply 20, a magnetic flux is generated around the υ core 9 according to Fleming's law.
When it is rotated by a short distance, a current flows through the carp /l/ cast in the rotary blade 17, and the current flows into the dummy side flow Io, 7.
It is input to the comparator 18 as the actual pressure vO. On the other hand, rotate the rotary blades 12 and 13 on the coated cutter 1l side, and
As the core 9 is brought closer to the core 9 while cutting the blade 9, current flows through the VC# coil inside both the rotary blades 12 and 13, and the current 11 on the rotary blade 12 side, the voltage ■1 on the rotary blade 13 side, and the voltage 1 on the rotary blade 13 side. Tonryu I
, l, and the voltage V, are input to the comparator 18. At this time, the relationship between the electromotive current generated in each rotary blade 12, 13, and 17 and the distance NL from the core 9 is approximately the same.

Therefore, if the distance between the rotary blades 12 and 13 and the core 9 and the withstand height 11 between the dummy rotary blade 17 and the exposed core portion 15 are the same, each current l input to the comparison device 18. , l, I
2 and each voltage ■. %V engineering and v2 have the same value.

First, if the distance between the core exposed portion 15 and the dummy rotary blade 17 is set to an optimal value (for example, about 0.5 mm), then a current l of a value corresponding to the distance 7 is generated. At the end of the primary cable 10 where , 'frL pressure ■o is input to the comparator 18, the rotary blades 12.13 are rotated in the same way as the dummy rotary blade 17 and brought close to the core 9. 1, the current 11, I2, generated in the coil 71/ in the rotary blade 12.13,
1 Masagi V1, the right side is input to the comparison screen 2 18 -, and the current Io s 11t vO'FtE
The rotary blade 12.13t is moved closer to the core 9Ic until ltiU 11, ■9, and IL pressure ■2 become the same value.

Then, when the distance between the dummy rotary blade 17 and the core exposed portion 15 is the same as the distance between the rotary blade 12.13 and the core 9, the sheathing cutter 11 is moved in the longitudinal direction on the cable 10, The insulating layer 19 is cut vertically into small pieces.

At this time, if there is a place where the core 9 is eccentric with respect to the insulating layer 19, the rotary blade 12.13 approaches or moves away from the core 9. From K, the values of the current 11, I- and the voltage 1, v2 changes, and the uneven thickness is detected immediately, so immediately after detection, move the rotary blade 12.13 away from the core 9 or move it away from the core 9.
The movement is controlled in the direction that brings it closer to .

In this way, the insulating layer 19 is cut while maintaining the preset distance pressure between the rotary blades 12 and 13 and the core 9 approximately constant by the dummy rotary blade 17, but the current I0
, Voltage■. To compare current 11 and '5b voltage ■ii■2, each current I. , Iyo, Io and each voltage■. ,
■ A method can be considered in which the indicator person directly compares the values of V and V, and then manually compares the rotary blade 1 based on the comparison of 7.
It is conceivable to move 2.13 q['3 II・1st 111. History [(In the comparator 18 (ζ forms a comparison circuit, -7 circuit has a current of 1.1, a voltage of ■.
9, 'tE II V,, V2 Tot Comparison 1. ,lt
('yJ2 results may be output to the rotary blade moving device to perform automatic control -C.

Next is the tr near the rotary blade 12? I will explain one example of the construction. The same applies to the rotary blades 13 and 17.

In FIG. 3, which is a longitudinal side view, the rotary blade 12 in the radial direction of the output shaft 21 is fitted to the tip of the output shaft 21 of the reducer A and J motors (not shown), and The inner pressure from the outer circumferential part 12a of the nine-rotary blade 12, which is fixed in place, is controlled by a coil 23 which is cast in an annular shape in the direction of rotation.
Both ends tJ of the coil/l/23 pass through the output shaft 21 and are connected to a slip ring 25 fixed to the outer peripheral surface of the output shaft 21 via an insulating member 24. slip ring 2
The brush 26 is in pressure contact with the brush 26), and the brush 26 is connected to the comparator 18 (FIG. 2). Core 9 (2nd
Output shaft 21 formed near the figure). ! : When the rotary blade 12 rotates within the magnetic flux in the right angle direction, an induced electromotive current is generated in the coil 23, and the slip ring 25 and the brush 26
It is designed to be connected to a comparison device 18 (FIG. 2) via a.

Next, an embodiment of the covering cutter 11 in which the distance f4tg between the rotary blade 12 and the core 9 is automatically controlled will be described. FIG. 4 is a front view of the coated cutter 11, and FIG. 5 is a front view of the coated cutter 11, and FIG.
−■ It is a view from the arrow. Four wooden loafs rotatably provided on the covering cutter 11 - 27, 28, 29, 30
Holding the Yofu Cave 7L'IO (Teyo υ Cape A/
A cutter 11 is installed at the second position. Each loaf
27, 28, 29, 30 are parallel to each other,
As shown in FIG. 5, when viewed from the side, each central axis is located at the apex of a substantially square shape. In Fig. 5, the cutter 11
At the upper right end of the arm 32, the base of the arm 32 is rotatably supported in the direction of arrow X through a pin 31 that is substantially parallel to the roller. A reduction gear motor 33 is fixedly installed. The motor 331'' has an output shaft 21 in a direction perpendicular to the center line of I cape/l'IO, and has an F cape/
The center of the rotary blade 12, which is arranged on a plane in the L/100 radial direction and in the longitudinal direction, is fixed. On the other hand, Power Tsuta-11
The D C-1 kneader 34 is located at the upper end of the
A beaver screw 35 is formed on the output shaft of the motor 34 (which is rotatably supported in two directions). Further, at the tip of the arm 32, an Ill screw member 36 into which a beaver screw 35 is screwed is supported so as to be freely movable in the direction of arrow X8. The frame 36 that supports the clockwise rotation of the center axis of . . . is formed from four long plates as shown in FIG. Remove the nut ((If it can be easily disassembled, wash it together. Although not shown in the figure, the long holes corresponding to the long holes 39 and 40 are of course movable.
A left frame 401c of the cutter 11 in FIG. 4 is provided.

When installing the sheathing cutter 11 on the cable IO, first sandwich the cable IO in parallel from above and below using the rollers 27, 29 and 28, 30.

As shown in FIG. 4, the frame 40 from the left side and the υ frame 36 from the right side are fitted onto both ends of the central shaft of each roller 27.2B, . . . and fixed with nuts. At this time, cable l
The vertical movement control of the rotary blade 12 during insulation layer cutting work, in which the rollers 27 and 29 are moved vertically in accordance with the diameter of O, is performed by receiving the output from the comparison device [18] shown in FIG. This is automatically performed by moving the DC motor 34 and rotating the arm 32 in the direction of the arrow X using the beaver screw 35 as the frontispiece.

As shown in FIG. 2, when cutting from both the upper and lower sides at once, the lower part of the sheathing cutter 11 is constructed symmetrically with the upper part, as shown schematically by the two-dot chain line in FIGS. 4 and 5. The dummy cutter 16 has the same structure as the conventional cutter that controls the vertical movement of the hand lII/lK shown in FIG.
The roller 2 is removed from the core 8 and a smaller structure is adopted for holding the core 8. must be used.

According to the present invention, the core 9 having conductivity in the center, eif
6 Kenji ;,. Attach a dummy core equivalent to the core 9 (exposed core portion 15LK), and rotate the rotary blade 17 of the coated cutter 11 in which the equivalent coil 23 is cast. , applying a current that generates an equivalent magnetic field to the core 9 and the dummy core,
The rotating dummy rotary blade 17 is set on the dummy core at a slight predetermined interval, and the dummy-side induced electromotive force generated in the dummy rotary blade 17 is detected, and the dummy-side induced electromotive current and the rotary blade 12 are detected. By comparing the induced electromotive current generated when the rotary blade 12.13 rotates and cuts the insulation J119, the rotary blade 12. Since the insulating layer 19 was cut while controlling the position of the rotary blade 12.13, the rotary blade 12.
It is possible to reliably prevent damage to the core 9 caused by 13 and excessive remaining of the insulating layer 19, and eliminate problems such as work errors due to damage to the core 9 and time-consuming peeling of the insulating layer 19. It has the advantage of making work more efficient because the speed can be dramatically improved.

[Another example]

As shown in FIG. 6, a dummy core 41 equivalent to the core 9 is prepared separately from the cape 1vxo, and the core 9 and the dummy core 41 are prepared separately from the cape 1vxo.
and AC power source 20 may be connected in series for 5K.

In this case, since the dummy core 41 is prepared in advance, the work of removing the insulating layer 19 at the tip of the cable 1O can be omitted.

It goes without saying that the present invention is also useful when applied to the removal of one protective coating layer in addition to the removal of the insulating layer as described above.

[Brief explanation of the drawing]

Fig. 1 is a front view of the coating cutter used in the conventional method, Fig. 2 is a conceptual diagram for explaining the coating layer cutting method □ according to the present invention, Fig. 3 is a vertical side view of the vicinity of the rotary blade, and Fig. 4 5 is a front view of the coated cutter used in the method of the present invention, FIG. 5 is a vv-tq diagram of FIG. 4, and FIG. 6 is a conceptual diagram showing another embodiment. 9...core, 10...cape 7,
11...Coated cutter. 12.13... Rotating blade, 15.41... Dummy core, [6... Dummy cutter, 17... Dummy rotating blade, 19... Insulating layer, 23... Coil

Claims (1)

[Claims] Attach a sheathed cutter to a cable with a conductive core in the center - equivalent to the above core & attach a dummy cutter to the exposed dummy core, and connect the rotary blade of a sheathed cutter with an equivalent coil to the dummy cutter. The dummy rotary blade is rotated in the same way, a current that generates the same magnetic field is applied to the above core and the dummy core, the rotating dummy rotary blade is set with the dummy core pζ at a small predetermined interval, and the dummy rotary blade is By detecting the electromotive current generated on the dummy side S4 in the coil and comparing the induced electromotive current on the dummy side with the induced electromotive current generated when the rotary blade of the coating cutter rotates to cut the sheath. The position of the rotary blade of the coated cutter is adjusted so that a predetermined distance is always maintained between the rotary blade of the cutter and the core regardless of the eccentricity of the core.
A method for cutting a covering layer of a cape, the method comprising cutting the covering layer while cutting.