JPS5892574A - Method for removing insulating film of electrode wire in manufacture of electrostatic recording head - Google Patents

Abstract

PURPOSE:To omit a flame shielding device and to prevent accidents such as removal of the insulating film at the part other than the specified part of the electrode wire and fusing and cutting of the electrode wire itself, by positioning the small flame, which is used to burn and remove the insulating film of the electrode wire at the standby point which is not located vertically under the electrode wire. CONSTITUTION:The standby point of the small flame 1001 is set at the part excluding the point A which is located vertically under the electrode wire 1015 within an elliptic locus 1014. It is desirable that the small flame is positioned in front of the electrode wire 1015, with a distance alpha being kept so that the movement of the small flame 1001 is stabilized. The movement of the small flame becomes unstable in the transient period from the time a clutch is connected so as to transmit power to a manipulating lever 1006 through a rotary lever 1004 and the small flame is started until the time the speed of the small flame becomes a steady state.

Description

Detailed Description of the Invention Technical Field The present invention relates to a method for removing an electrode wire insulation film in the production of a wire multi-stylus type electrostatic recording head. A circumferential drawing of a part of the body O.
Attach a number of good 7 lexiple printed circuit boards with IJ wiring (electrode-connection lands and mats), and attach electrodes from which the insulating film portions have been removed in advance to areas corresponding to the printed circuit boards O and D above. iii In addition, an electric Iis insulating coating JIII in the preparation of an electrostatic recording head, in which an electric l1III is connected to an electric KII# to the above-mentioned printed circuit board
This relates to a removal method.

Background of the VSO technical manual Conventionally, the I-Lutes titus-type electrostatic head, which electronically scans and distributes image signals, was used by lumberjacks.
II71! has been done. Electrostatic Head Co., Ltd., which uses 12M on a 7-axis electric device, records scanning - 1 line'gs roaring i
A multi-stylus type is used in which a large number of recording electrodes, one pair corresponding to each IK element, are arranged in a line in an insulating material such as an epoxy resin mold, and an auxiliary stylus is placed on the front or back side of the recording medium that is in close contact with the stylus. Due to the action of the electrode, i
Electronic scanning distribution of IR signals is performed.

FIG. 1 shows an example of a same-plane control type electrostatic head in which recording electrodes and auxiliary electrodes are arranged on the same plane side with respect to a recording medium. In FIG. 1, with a 101 Fi recording electrode,
They are each placed independently in a row with their tips exposed on an electrode holder 103 made of an insulating material such as epoxy resin at a density of 1 m or more. 102#i auxiliary electrode, the recording electrode 101 is divided into groups of the same number, and the electrodes are placed close to each other on both sides corresponding to each group.
It is placed and exposed on the electrode holder 103 so as to have a flat surface.

Since the auxiliary electrode 102Fi has the ability to control the recording position of the recording electrode 101, it is also called a control electrode. In electrostatic recording, the recording voltage is approximately divided into two and applied to the dispensing electrode 101 and the control voltage 1i102, and recording is performed only at positions on the electrostatic recording paper 104 where both voltages are applied simultaneously.

Next, regarding Figure 2, which shows the electrode configuration of a co-directionally controlled electrostatic recording head, we will discuss the recording mechanism. I will clarify. In FIG. 2, a large number of recording electrodes 201 are divided into a large number of electrode groups each consisting of m electrodes, and recording electrodes having the same relative position in every other electrode group are connected to each other. Each electrode group ole*electrode 20
1 is arranged so as to correspond to the center of the control electrode 202 and the center of the adjacent control electrode. Here, when the total numbers of recording electrodes and control electrodes are respectively N and M, there is a relationship as follows.

Recording is performed simultaneously with m recording electrodes 201 for each group, and Kt! used. To explain specifically, in the JllK2 diagram, the first electrode group G-1
When recording with
Depending on the putter 7 to be used, high voltage pulses of 300 V and 0.0V are applied, and at the same time, 1 of the system Gc of the control electrode 202 is applied.
A voltage of opposite polarity, for example +300V, is applied to and 2. As a result, between the recording electrodes of electrode group G-1 and the electrostatic recording paper (not shown), a voltage of 600 V or H 300 V is generated.
A potential difference of 600 cm is generated, and an electrostatic latent image is created on the surface of the electrostatic recording paper immediately below the recording electrode. Next, recording electrode group G-2 is recorded by driving system Ga of the recording electrode group and applying voltage to the second and third control electrodes. Thereafter, while G and Gl are mutually driven, the control electrodes are shifted one by one and voltage is applied to two at a time to perform scanning recording of the l line.

By the way, the applicant has previously provided a new electrostatic recording head and an apparatus for manufacturing the same. It is explained below, m3
In the above, 305 is an electrode wire, φ0604~0. i
An insulating film such as formal,
5 to 20 resins such as polyurethane or polyester
The voice consists of a coating of uniform thickness. One end of the electrode It 305 is provided with a rectangular rod-shaped electrode holder 303KJI made of an insulating material such as epoxy resin, and arranged in a row at a predetermined pitch (0.06 to 0.06 mm) along one longitudinal surface in order to contact the recording medium. The recording electrode 301 is constructed by exposing the inside of the tube in step 2). On the other hand, the other end of the electrode #305, which will be described in detail later, is the same as the electrode holder 303, and is made of a similar insulating material. 305 is
The structure shown in Fig. 3 is stretched while maintaining a pitch equal to the array pips of the recording electrodes, and the printed wiring board 307
Each electrode wire is electrically tied to a predetermined position.

The printed wiring board 307 is used to realize the structure of the head electrode shown in FIG. That is, the recording electrodes 301 are divided into a large number of electrode groups each consisting of m electrodes, and electrode groups of one group having the same relative position are interconnected to form two systems of G and Gl electrode groups. The wiring to be constructed is, for example, fabricated using photoetching technology for copper-clad laminates.

FIG. 4, which shows only this printed wiring board 307, will be described in more detail. In FIG. 4, 411 electrically connects the electrode wire! ! Lands for threading are provided in a staggered manner at a constant pitch so as to correspond to each of the recording electrodes, that is, the edges of the electrodes, and to facilitate division into groups.
A predetermined number, for example, twice the number m of recording electrodes in an electrode group, that is, 2 m, are arranged in a column unit in a direction parallel to the arrangement direction of the recording electrodes 301. Connection land 4 of these electric @-
11 is a conductor 41 for commonly connecting recording electrodes having the same relative position in every other recording electrode group described above.
The wires are connected by 2 and 9. The set obtained by these conductors 412 is connected to the recording electrode drive circuit as described above and is supplied with a high voltage pulse corresponding to the number iijm to be recorded, but for this reason the electrode line connection / Do 4
It is electrically connected to the conductor 414 on the back side of the substrate by a through hole 413 provided in the portion 11 or a part of the conductor 412, and these conductors 414 are connected to the electrode drive circuit (not shown) for good connection. It reaches the plug part 408 which is used for the purpose. The printed wiring board 407 also has an electrode holder 3 in FIG. 3 for controlling the recording position of the recording electrode.
A good O-land 415 for connecting the control electrode 302 which is buried in 03 and exposed at the same 101 as the recording electrode, and a conductor 416 to lead this to the T-connection part 408. has.

In addition, in Fig. 4, the connection land for arranging the IJ circuit part and the control electrode is made of a flexible material, for example, with a thickness of 4 to 125 mm.
The printed circuit board is made of μ polyester, polyimide, or glass epoxy laminate, and the ** section is a rigid printed circuit board, which are integrated by bonding and are electrically connected to each other.

Ninth, reduce the dimension of the printed circuit board in the direction of the electrode edge,
Electrode wire to construct a smaller electrostatic recording head!
The number of land unit arrays for the ll period may be made equal to the number of recording electrodes in one electrode group, that is, m, and a circuit configuration as shown in FIG. 5 may be adopted. In the figure, the land 511 for connecting the electrode 111 has a circuit configuration in which every other column is commonly connected to the conductor 512 1, and the terminals 415 and 515 are connections for the control electrode wiring. It is used for electrical connection with a rigid printed circuit board 310 that has a land and a plug part, and has the same number of terminals of substantially the same shape in opposing positions, and has terminals that are in contact with each other or are electrically conductive. Electrical continuity is achieved by bonding with adhesive or further by soldering. The purpose of using a flexible printed circuit board in this way is to facilitate manufacturing, which will be explained next.

FIG. 6 is a diagram showing an example of an apparatus for manufacturing the electrostatic recording head shown in FIG. 3. 61O is a columnar body, for example, a diameter 1 in which thread grooves 611 are formed at the same pitch as the arrangement pitch of the electrodes, for example, 0.125 mm.
010Os! It is a metal cylinder or cylinder (hereinafter referred to as a wire-wound driver) with a diameter of about 180mm, and on its outer periphery, there are a slightly deep straight groove 612 and a shallow straight groove 613 of about 180 mm along the longitudinal direction so as to cross the thread groove 611 thickly. They are formed separated by . Note that the winding drum 610 #i has shafts at both ends,
It is designed to be rotated in the direction of the arrow by a power line (not shown).

620 is IIkIm! A metal cylinder (9 small diameter) with screws #1621 formed on the circumferential surface at a pitch of four threads with the drum 610 (
(hereinafter referred to as a guide screw), and is rotated in the direction of the arrow at the same speed as the **Do2Muro 10 by a transmission mechanism (not shown). 631 and 632 are wire guides and electrodes! 6400 and is rotatably supported. 650 is an insulating film removing device, and an electrode
4, while running the insulating film on the legs and over a predetermined length. 660 is an electrode-single force control mechanism that uses a hysteresis brake to brake the rotation of a tram with a fixed torque using a hysteresis brake. Conducive to correct alignment. Note that this tension control mechanism 660 and the above-mentioned
By rotating the insulating skin removing device 650, the two wire guide rods 30 #i, and the feed screw 670 by a power source (not shown), the longitudinal direction of the winding drum 610 is synchronized with the rotation of the winding drum 610. It is placed on a table 680 that is supported so as to be movable in a direction parallel to .

Wire leads 633, 634, and 635 are used for guiding the continuous electrode wire 640, such as changing its direction, and are rotatably supported. 636 is a buffer roll; pin 637f: buffer lever 638K (b) supported swingably as a fulcrum;
The electrode 11640 is rotatably supported, and the tension applied to the continuous electrode 11640 is adjusted by the action of a tension spring 6390.

690 is a wire spool that is rotatably supported.
, Den1ii1! 640 continuously.

Next, using the configuration explained above and the device shown in Figure 6, the third
The following describes the procedure for manufacturing the electrostatic recording head.

First, prior to arranging the electrode wires, the control electrode row to form one row of the two rows of control electrodes arranged sandwiching the recording electrode 301 shown in FIG.
At the same time, as shown in FIG. 4 or FIG. 5, an epoxy tree 11 containing a conductive adhesive, such as a silver filler that is dry and flowable at room temperature, is applied to the electrode wire connecting lands 411 and 511 by any means in advance. For example, a flexible printed circuit board coated to a predetermined thickness by a screen printing method is attached to the winding drum 610. C) A predetermined position Kl is attached. As shown in FIG. 7, the control electrode array includes a prismatic portion 711 having a member of a predetermined size and a thin conducting wire portion 712 connected to the prismatic portion 711.
A control electrode unit (710) consisting of a small flat part 713 for connection between the handle and the cord is manufactured by cold heading of brass or bronze, for example, and is flattened in one end direction of the prismatic part. Control voltage @0 on board 720
It is constructed by joining or gluing a predetermined number so that the pitch is equal to the arrangement pitch. This is Evo medium resin injection which will be described later.
After that, the wire part is cut and separated as a control electrode. Now, the electrode 11640 is paid out from the wire spool 690, and the wire guides 635, 634 and the buffer roll 63 are separated.
6. Through the wire lead 633, the tension control mechanism 66
0, insulation film removal device 650, wire guide 631,
632 and the winding drum 6 via the guide screw 620.
One end is identified near the thread length 6110 of No. 10. In this state, the winding drum 610 and the guide screw 620 are rotated at the same speed in the direction of the arrow, and the table is moved in synchronization with this. The insulating film removing device 650 removes the flexible printed circuit board 57 for each rotation of the thin drum 610.
411, 511 K electrode! ! It operates by tying so that the insulation film removed portion of 640 comes into contact with it.

In this way, the electrode 11640 to which a constant tension is applied by the tension control mechanism 660 has the insulating film removed at a predetermined position, is guided by the guide screw 620, and is wound in the thread groove 611 of the winding drum 610. In the process of this one-time operation, all of the electrodes ml 640 that make up the recording electrode assembly were installed on the flexible printed circuit boards KIi! However, this situation is explained in detail based on Figure 8. I will clarify.

In FIG. 8, 807 is a flexible printed circuit board (
D mt shows, 805, 811 $? jhi812
$1 A conductor for matrix wiring between an electrode wire, a connection land for the electrode wire, and a skeleton land. The electric current 1i that is passed through the winding drum 610 once! 1805 Fi As mentioned earlier, they are arranged at a pitch P equal to the arrangement of the recording electrodes, are regularly arranged on the flexible printed circuit board 807, and intersect with the land 811 for connecting the Kyuden 41k line.

At this time, the electrode @ 805 Fi! As shown in the figure, the insulation film removal device 650 described above removes the insulation film at 11 locations so as to match the electrode wire connection lands. That is, the first electric fiIIIiI has the insulation film removed in correspondence with the land ■, and the second one pole wire has the insulation film removed part of the 111th electric wire in the direction of the electric wire iim. The insulating film is removed at a distance t from the surface, and the groove corresponds to a land 2 separated by a distance t.

These lands are arranged in a staggered manner so that the electric wires to be connected are always located in the center by being shifted by a distance P equal to the arrangement pitch of the electrodes. As mentioned earlier, conductive adhesive is applied to these connection lands 811 in advance, and the electrode wires from which the insulation film has been removed are heat-cured to ensure continuity and to be mechanically strong. Fixed. In addition, this @
＠The conductive adhesive also comes into contact with several electrode wires adjacent to the electrode wire from which the insulating film has been removed, and is mechanically identified after being heated and cured, but since these have an insulating film attached, they are electrically insulated. is maintained.

When the winding work is completed to form all of the recording electrodes 301 of the electrostatic recording head shown in FIG. Cut off and fix the rear end on the winding drum. After that, the first drum 610 is removed from the apparatus shown in FIG. 6, and the deep straight groove 612 and the shallow straight groove 6 are removed.
Attach a casting mold W having grooves of respective depths opposite to the electrode holder 30 in FIG.
3 In the t-1 shallow straight groove part, the electrode narrow end holder 317
Pour epoxy resin to form each. In addition,
At this time, a control electrode row as shown in FIG. 7 is placed in the groove 1I& opposite the deep straight groove 613, and the other row of control electrodes is inserted in the same way as in the deep straight groove 612 before the winding operation described above. It is used pre-installed in a predetermined position for forming.

After the casting work, the winding drum 611 is heated in a furnace for a predetermined period of time to harden, and the conductive material applied to the electric connection land of the flexible printed circuit board on the left where the J line and control electrode are integrated is Adhesives are also used for pneumatic bonding. After that, the unnecessary part of the electrode wire is cut off, the W type and the winding drum are removed, and then the electrode holder 303 and the electrode! iii #I The end holder 317 is machined to a predetermined size.

The electrode wire end holder 317 is then coated with an insulating material such as 1iiiK11 resin, which exposes the edge of the electrode, to completely insulate and drill the opposite end of the electrode, IIOme-electrode.

The flexible printed circuit board 307 on which the electrode 305 constituting the recording electrode fi 301 has been identified is further connected to the control electrode 30.
It is integrated with a rigid printed circuit board 31g having a plug part 308 used for connection with the land for connecting the lead wires of No. 2 and the driving path (not shown) of each electrode by soldering or adhesion with a conductive adhesive. become After that, lead # 309 is passed between the 7 rat part of the control electrode (713 in FIG. 7) and the rigid printed circuit board 310.
Soldering connections are made to obtain an electrostatic recording head as shown in FIG. Although this is not shown, the electrode holder 303
A rigid printed circuit board 310 is identified with a metal fitting, and a bracket (-) is placed over the rigid printed circuit board 310 to be incorporated into an electrostatic recording device such as a facsimile machine and used.

The electrostatic placement head manufacturing apparatus previously provided by the applicant employs a method of burning off the insulating film using a minute torch as shown in FIG. 9 as the insulating film removing device 650. In FIG. 9, a small flame 901 is obtained by burning a mixed gas of oxygen and hydrogen ejected from a nozzle 902 having a small inner diameter. Reference numeral 903 is a small diameter pipe that guides the mixed gas, and a pipe 903 is provided on the rotary lever 904.
05K Rotatably supported operating lever 906Kil
It is fitted and fixed in the specified pusher 907. The rotary lever 904 has a one-turn clutch 908 and a pulley 909 on the same axis, and is intermittently driven to rotate by a power source (not shown). That is, pulley 9
09 is always rotated once by a power source (not shown). Normally, the tip of the armature 917 of the electromagnetic solenoid 916 is inserted into the hole provided in the clutch 908.
1, this Kurarechi is in a disconnected state. When this electromagnetic solenoid 916 is temporarily driven to disengage the armature 917, the clutch remains engaged for only one rotation, the rotary lever 904 rotates once, and one side of the tube 903 is pinned. A well-swinging lever 91 is rotatably supported by a shaft 910.
1, fitted into a sliding bushing 912 identified and attached to
It is slidably supported, and the rubber tube 913 is
The mixed gas is supplied from an oxygen and hydrogen gas generator (not shown).

Next, the operation of the insulating coating lI removing device 650G for the electric wire 41m1t having the above-mentioned '#- configuration will be explained with reference to FIG. The flame 1001 before starting the insulating film removal operation is at the lowest point of its locus of motion 1014 as shown in the figure, and the electrode li 1015 from which the insulating film is to be removed moves along the locus of flame motion 1014 at a predetermined speed. The vehicle is traveling in the direction of the arrow while maintaining a predetermined angle f0 smaller than 90°. -Pulley 1009
is rotated by being powered by a belt or chain from a power source (not shown).

Therefore, the electromagnetic solenoid 1016 is driven and controlled at a predetermined timing to connect the one-turn clutch 1008, and the rotation lever 1004 #i rotates. At this time, tube 10
03 swings in the lateral direction together with the swinging lever 1011 while sliding within the sliding bush 1012, so that the upper end portion moves along with the operating lever 1006, pushbutton 1007 in an approximately #1 elliptical motion. Therefore, the flame 1001 emitted from the nozzle 1002 moves along a substantially elliptical trajectory indicated by 1014 in the direction of the arrow. And the upper part is a straight part,
electrode! Cross 1m 1015 at an angle of -,
Burn off and remove the insulation film. The angle go between the flame motion speed and the electrode is appropriately selected so that the electrode wire itself does not melt and the insulating film is removed over a predetermined length.

Problems of the Background Art By the way, in the electrode 1 insulation and edge coating removal device previously provided by the applicant, the small thread 901 [a certain section along the electrode wire 915] is roughly synchronized with the feeding speed of the electrode wire 915. The trajectory of the small flame 901 is elliptical because the insulating coating of the electrode is burnt out and removed during the parallel running, and the small flame 901 is made to run in parallel to reduce the size of the device and the operating space.
1 locus 914 with a short axis of 6 to 4 cm and a long axis of lO to 8CII
It is said that Therefore, as described above, the standby position of the small flame 901 is the lowest point of the small flame trajectory 914 (directly below the electrode).
In this case, when the small flame 901 is on standby, there is a risk that the insulating cover 11 other than the predetermined portions may be removed or the electrode wire itself may be fused. Furthermore, in order to completely eliminate such accidents, an extremely complicated mourning device was required.

OBJECT OF THE INVENTION The object of the present invention is to provide a cell edge film removal method for electric wires that does not require flame cutting and completely prevents accidents such as removal of insulation coatings other than designated areas and melting of wires and wires themselves. This is what we provide.

5) Summary of the Invention In order to achieve this object, in the present invention, a small flame is made to draw an elliptical trajectory directly below the electrode supplied to a cylindrical body on which a flexible printed circuit board is attached, and a small flame in the armpit is created. The insulating coating of the electrode wire is removed by burning out in a certain section above the O movement area, and the standby position of the small flame is located in a part other than vertically below the electrode wire.

Embodiments of the Invention The present invention will be described below with reference to seven embodiments shown in the drawings. FIG. 1θ shows the standby position of the small flame 1001 in the electric IiIim insulation film removal device.

In addition, the code of each element in FIG. 1θ is 9! in FIG. 9!
It is made to correspond to the original code, and those whose last two digits match indicate the same element. The method for removing an electrode wire insulation film according to the present invention is such that the waiting position of the small flame 1001 in the removal position of the electrode wire insulation film described with reference to FIG. It is preferable to position it in front of the electrode @ 1016 so that it does not receive the shadow IIl of the small flame 1001 and maintains a distance α at which the movement of the small flame 1001 is stabilized. In other words, the movement of the small flame becomes unstable because the clutch 1008 is connected and
Power is transmitted to the operating lever 1006 via the rotating lever 1004.
As a result, the oversearch period from when the small flame 1001 is started until its speed reaches a steady state, for example, in the case of a circumferential speed period Q of 3 seconds, is within the range of the 5so* formula.

The position (distance H) where the f electrode @ 1015 is affected by the small flame 1001 is determined by the width of the flame, temperature distribution, etc.

Therefore, the standby position of the small flame 1001O may be determined in consideration of these points.

As described above, the method for removing the electrode wire insulation film in manufacturing an electrostatic recording head according to the present invention avoids the small flame that burns and removes the insulation film of the electrode wire from directly below the electrode wire. Since the electrode wire is placed on standby while avoiding exposure to small flames, it is possible to completely prevent accidents such as removal of the insulating film from areas other than the designated areas of the electrode wire and melting of the electric am itself, and moreover, it is specially designed to prevent such accidents. There is no need to prepare the 9th place.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the image-controlled electrostatic recording head, FIG. 21 is the electrode configuration of the image-controlled electrostatic recording head, and FIG. 3 is a perspective view showing the electrostatic recording head. Figure 4 shows the manufacturing process for the electrostatic recording head! FIG. 5 is a front view showing another example of the flexible printed circuit board; FIG. 6511 is a perspective view showing the amount of iron produced in the electrostatic recording head according to the present invention; FIG. (a) is a perspective view showing the control electrode used in manufacturing the recording head; FIG. 7(a) is a perspective view showing the control electrode attached to a flat plate; FIG. FIG. 9 is a fi+ view showing the electrode wire insulating film removing device according to the present invention, and FIG. 1θ shows its standby state at. FIG. 101-, 201, 301... recording electrode, 102
, 202. 302... Control electrode, 103, 303... Electrode holder, 104... Electrostatic recording phenomenon, 305, 805,
640, 805. 915, 1016...electrode wire, 307, 407
, 507...Flexible printed circuit board, 411,
511, 811... electric 1iii + connection land,
317... Electrode wire end holder, 610... Winding drum, 650... Insulating film removal device, 901, 100
1... Small flame, 902, 1002-... Nozzle, 90
3, 1003...Pipe, 904, 1004...Single turn lever, 906, 1006...Operation lever, 907
, 1007... Bush, 908... Single rotation clutch, 909.1009... Pulley, 910, 1
010... Pin, 911, 1011... Rocking lever, 912, 1012... Sliding bush, 914
, 1014... Motion trajectory of small flame, 9016 , 10
16...Electromagnetic Trenoid, 917, 1017...
- Armature, A... vertically below the electrode wire. Figure 1 Figure 2 Figure 3 i5 Figure 5 5'15 Figure 7 Figure 8

Claims (1)

[Claims] A flexible printed circuit board with straight grooves formed in the direction of the inner ring and a part of the periphery of the nine cylindrical body with lands for thin electrode connections and matrix wiring is attached to this, and a position 0JIE corresponding to the land of the above printed circuit board is attached to this. The membrane portion is removed in advance to form a friend electrode, and the electrode is placed on the land of the printed circuit board.
In preparing the electrostatic recording head to electrically connect the cylindrical body, directly under the electrode wrap that is supplied to the cylindrical body, an elliptical locus is traced to the small flame, and the electrode II
The electric mss in the preparation of an electrostatic recording head that uses the following methods as mold cultivation: -K, the standby position of the small flame is set to a part excluding the area directly below the electrode -, and **xm
How to leave.