JPH0776127A - Manufacture of multiple pointer recording head - Google Patents

Abstract

PURPOSE:To prevent a wire for a recording electrode from loosening and moving under a state wherein it is wound around a jig for a coil. CONSTITUTION:In a method for manufacture of a multiple pointer recording head wherein a wire 11 for a recording electrode is wound around a wire holding groove 3 of a specific pitch formed on a jig 1 for a coil, and the wire 11 for recording head is fixed by electrical insulating resin around it while it is zigzag arranged, the wire 11 for the recording electrode is heated before it is wound around the jig 1 for the coil, loosening of the wire 11 for the recording head is removed by contraction after it is wound around the jig 1 for the coil and it is wound thereon by appropriate tense force. Since the wire 11 for the recording head is prevented from being dislocated from the groove thereby, recording electrodes of a straight line can be formed at a specific pitch without any short circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a multi-needle recording head suitable as an electrostatic recording type recording head.
More specifically, according to the present invention, in order to arrange two rows of recording electrode wire rods in a staggered pattern at a constant pitch and harden them with an electrode supporting block such as an electrically insulating resin, a winding jig is used for recording electrode wire rods. About how to wind.

[0002]

2. Description of the Related Art Generally, a multi-needle recording head used in an electrostatic recording system has M.times.N first recording electrodes consisting of N sets of M sets and a predetermined interval in parallel with the first recording electrodes. The M × N second recording electrodes, which are arranged in parallel with each other, are arranged at a high density with a constant pitch, and are hardened by an electrode supporting block made of an electrically insulating resin or the like so as to expose each end face.

As a method of manufacturing a multi-needle recording head having such a structure, the present inventor has previously proposed a technique capable of efficiently manufacturing two winding jigs 301 as shown in FIG. (JP-A-2-239953). This winding jig 301 has a cavity groove 305 in which the control electrode 100 is set and resin for the electrode support block is poured.
The cavity groove 3 is formed so as to cross the cavity groove 305.
The wire rod holding grooves 309 for arranging the wire rods for recording electrodes 200 formed on the jetty portions 306, 307, and 308 at the edge of 05 at a constant pitch, and the wire rods 200 on both side wall surfaces of the winding jig 301 can be hooked arbitrarily. Orienting pin 302 and bundling pin 3 for enabling to be drawn in the direction and position of
03 and a turn pin 304. The control electrode 100 is set in the cavity groove 305 of the winding jig 301, and then one wire for recording electrode is alternately entwined with the pins 302, 303, 304 on both sides to continuously cross the cavity groove 305. The recording electrodes belonging to the same group are bundled together and the M × N recording electrode wire rods 200 are stretched over the cavity groove 305 at a constant pitch.

To wind the wire rod 200 around the winding jig 301, the reciprocating linear motion of the wire rod guide means 311 in the axial direction (the direction indicated by the arrow) and the swinging movement of the winding jig 301 are used. Then, while applying a certain amount of tension to the recording electrode wire rod 200 by a back tension mechanism (not shown), it is drawn around by the nozzle 312 of the wire rod supply device 310 and the predetermined pin 3 is drawn.
02, 303, 304 and wire rod holding grooves 309, ..., 3
It is performed mechanically by hooking the wire rod 200 on 09. Then, in the same manner, another cavity jig 30 is formed by abutting with another winding jig (not shown) having the second recording electrode and the control electrode set therein.
Resin is poured into the space formed between 5, 305 to form the electrode support block 103. In the space formed by the abutted cavity grooves 305, 305, the wire rods 200, 200 for the first and second recording electrodes and the control electrodes 100, 100 are arranged parallel to each other and centrally arranged with a certain positional relationship. The resin that constitutes the electrode support block is injected around it. Then, after the electrode support block is solidified, the bundle of wire materials 200 is removed from the turn pin 304, and the multi-needle recording head is taken out from the winding jig 301.

[0005]

However, in this conventional winding method, as shown in FIGS. 4B and 4C, the portion forming the recording electrode of the wire 200 (the right jetty in FIG. 3). Section 307 and the central jetty portion 306 or each of the wire rod holding grooves 309 of the central jetty portion 306 and the left jetty portion 308,
The recording electrode wire rod between 309) is loosened, and the accuracy of the installation position of the recording electrode wire rod is extremely deteriorated ((C) of FIG. 4). Further, since the N (for example, 55) recording electrode wires 200 are distributed and wound from one orientation pin 302 to the wire retaining groove 309 of the jetty portions 307 and 308, the recording electrode wire having the pin 302 is formed. There is a risk that loosening of the winding wire 200 may cause loosening of the recording electrode wire material 200, thereby disturbing the positional accuracy of the wire material 200 in the portion forming the recording electrode ((B in FIG. 4). )reference).

Furthermore, if sufficient tension is not applied to the wire 200 even if the wire 200 is not loosened enough to cause misalignment or groove dislocation, the wire for the recording electrode cannot be securely held. A defect that moves when an external force is applied occurs. Since the slack and the out-of-groove of the recording power wire lead to serious defects such as linearity defect, pitch defect and short circuit defect of the recording electrode, improvement is desired.

It is an object of the present invention to provide a method for manufacturing a multi-needle recording head which can prevent the recording electrode wire rod from slackening or moving while being wound around a winding jig.

[0008]

In order to achieve the above object, the present invention provides a recording electrode wire rod by winding the recording electrode wire rod in a groove for holding the wire rod formed in a winding jig at a constant pitch. In a method of manufacturing a multi-needle recording head in which streaks are arranged in a staggered manner and the periphery thereof is solidified with an electrically insulating resin, the recording electrode wire is heated before being wound around a winding jig.

In the method for manufacturing a multi-needle recording head of the present invention, the recording electrode wire is coated with a heat-fusible adhesive, and heating means integrated with the wire supply device. It is preferable to heat the conducting wire by.

Further, according to the method of manufacturing a multi-needle recording head of the present invention, a double-sided adhesive tape is stuck between the wire-holding groove on the winding jig and the wire-feeding device, and pressed against the double-sided adhesive tape. However, the recording electrode wire is wound around.

[0011]

Therefore, since the recording electrode wire rod heated before being wound around the winding jig is cooled and contracted after being wound around the winding jig, the slack is removed and an appropriate tightening force is applied. It is wound around the winding jig. Also, when using a wire coated with a heat-sealing adhesive as the recording electrode wire, the winding jig is slackened, and the adhesive is hardened by the adhesive, so position accuracy is improved. It is possible to more reliably prevent the movement of the recording electrode wire material that causes deterioration or groove dislocation. Furthermore, when a double-sided adhesive tape is attached between the wire rod holding groove on the winding jig and the wire rod supply device, and the recording electrode wire rod is wound while being pressed against the double-sided adhesive tape, the recording electrode wire rod The heat of vaporizes the solvent on the adhesive surface of the double-sided adhesive tape to increase the adhesive force, and the wire rod bites into the double-sided adhesive tape due to the shrinkage of the recording electrode wire material after winding, and the wire material is further fixed by the double-sided adhesive tape. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below with reference to the embodiments shown in the drawings.

First, a winding jig used for carrying out the method for manufacturing a multi-needle recording head of the present invention will be described. This winding jig is not limited to a specific structure, but is disclosed in the winding jig previously proposed by the present inventor as shown in FIG. 3 or Japanese Patent Application No. 4-291941. It is preferable to use a type in which a wire for a recording electrode is wound so as to traverse a cavity groove for molding an electrode support block by injecting an electrically insulating resin, like a winding jig.

For example, one of the winding jigs that is preferably used is one shown in FIG. The winding jig 1 includes a cavity groove 2 for molding an electrode supporting block by casting an electrically insulating resin, a wire rod holding groove 3 for holding a recording electrode wire rod 11, and a recording electrode wire rod. The receiving portion 6 which supports 11 between the wire rod holding groove 3 and the direction pins 7 _L and 7 _R , the direction pins 7 _L and 7 _R , the bundling pins 8 _L and 8 _R and the turn pins 9 _L and 9 _R. One recording electrode wire 1 is provided so as to cross the cavity groove 2 by utilizing these pins 7 _L , 7 _R , 8 _L , 8 _R , 9 _L , 9 _R.
1 is repeatedly wrapped around. The wire rod holding groove 3 is provided on the upper surfaces of the jetty portions 4 and 5 on both sides of the cavity groove 2 in a direction crossing the cavity groove 2. This wire rod holding groove 3 is a V-shaped groove having a depth and width substantially equal to the diameter of the recording electrode wire rod 11, and is formed at a pitch substantially equal to twice the diameter. Further, on the outer sides of the jetty portions 5 and 6 on both sides, the orientation pins 7 _L and 7 _{R for} orienting the recording electrode wire 11 and the same kind of recording electrode wire 11 divided into blocks are grouped. Bundling pins 8 _L , 8 _R and turn pins 9 _L , 9 _R for entwining and rotating the recording electrode wire rod 11 are provided. These pins 7 _L , 7 _R , 8 _L ,
The position and the direction of the wire rod 11 stretched by using 8 _R , 9 _L and 9 _R can be changed.

Further, the receiving portion 6 is in contact with the recording electrode wire 11 that is bridged between the wire holding groove 3 and the orientation pins 7 _L and 7 _R, and is oblique to the wire holding groove 3. The recording electrode wire 11 to be hung on is prevented from slipping sideways, and the recording electrode wire 11 is arranged on the extended line of the wire holding groove as much as possible to prevent the wire holding groove 3 from being slanted. A double-sided adhesive tape 10 is attached to the receiving portion 6. The double-sided adhesive tape 10 fixes the recording electrode wire 11 wound around the winding jig 1 so that the recording electrode wire 11 is less likely to be displaced. Further, the double-sided adhesive tape 10 is peeled off from the receiving portion 6 in order to prevent the wire rod from being disturbed when the wire rod 11 for the recording electrode and the like which has been solidified by the electrode support block is taken out from the winding jig 1 after the resin casting. It is provided so as to adhere to the recording electrode wire 11 side. For example, a double-sided adhesive tape having different adhesive strengths on the front surface and the back surface may be used, a release agent may be applied to the receiving portion 6, or the receiving portion 6 may be used.
A film of a material such as Teflon that is difficult to adhere to is formed on.

As the recording electrode wire 11, it is preferable to use a wire which is fused by applying heat. Examples of the heat-fusible wire include a wire with a bond that exhibits tackiness when heated.

On the other hand, the wire rod supply device for supplying the recording electrode wire rod 11 to the winding jig 1 is the recording electrode wire rod 1
It is provided so that the coil No. 1 is unwound to apply a constant back tension to the nozzle unit. This wire rod supply device is not particularly shown, but the other parts except the nozzle unit are configured as shown in FIG. 3, for example.

In the nozzle unit 20, as shown in FIG. 1, for example, a heater, for example, a ceramic heater 22 is provided in front of the nozzle 21 for guiding the recording electrode wire material 11, and the recording electrode wire material 11 is heated and then supplied. Is provided. The ceramic heater 22 is covered with a heat insulating material or a cover 23 having a heat insulating structure to keep the temperature constant. Here, in order to reduce the weight of the nozzle unit 20, it is preferable that the power source of the heater 22 is not mounted on the nozzle base 24 but is supplied from outside. The nozzle unit 20 is mounted on a feed mechanism that gives a reciprocating linear motion along the winding jig 1.

A multi-needle recording head is obtained as follows using the winding jig 1 and the wire rod supply device / nozzle unit 20.

First, before starting the winding of the recording electrode wire 11 around the pair of winding jigs 1 and 1, necessary parts such as control electrodes are placed at predetermined positions in the cavity groove 2 of each winding jig 1 and 1. Be accommodated as needed.

Then, for example, by using a wire rod supply device having a nozzle unit 20 as shown in FIG. 1, the pins 7 _L , 7 _R , 8 _L , 8 _R , 9 _L , 9 _R of the winding jig 1 are attached. By winding or hooking the recording electrode wire rod 11, the recording electrode wire rods 11 are arranged so as to cross over the cavity groove 2 and aligned in the M × N wire rod holding grooves 3 at a constant pitch. Each pin _7L , _7R , _8L , _8R , _9L ,
Since the winding of the recording electrode wire 11 around 9 _R is not particularly important in the present invention, a detailed description thereof will be omitted.
For example, while moving the nozzle 21 in the direction orthogonal to the wire rod holding groove 3 and winding the wire around one turn pin and the wire rod bundling pin N times, the N direction guide pins are used to move the nozzle 21 to the N wire rod holding grooves 3. It is done while being distributed. By repeating such an operation, M × N (for example, 7040) recording electrode wire rods 11 are all wound. At this time, the recording electrode wire rod 11 is heated by the heater 22 arranged immediately before the nozzle 21 of the wire rod supply device and then wound. Here, the recording electrode wire material 11 is heated to about 100 ° C. by the heater 22, for example.

The recording electrode wire 11 heated immediately before being wound on the winding jig is cooled and contracted after being wound on the winding jig 1, so that the slack is removed and an appropriate tightening force is applied. It is wound around the winding jig 1. Therefore, since the recording electrode wire rod 11 does not loosen or come off the groove in the portion forming the recording electrode, as shown in FIGS. 4 and 5A, the recording electrode wire material 11 does not overlap at a constant pitch and forms a straight recording electrode. Make up. In particular, the recording electrode wire rod 11
When a heat-fusible adhesive is used as the coating, since the adhesive is hardened by the adhesive after being wound around the winding jig 1, the recording electrode wire 1
The movement of 1 can be prevented more reliably. Further, in the portion of the double-sided adhesive tape 10, the recording electrode wire 11 contracts, so that the recording electrode wire 11 bites into the double-sided adhesive tape 10, and the solvent is vaporized by heating the adhesive surface, so that the adhesive force of the double-sided adhesive tape 10 is increased. The number of wire rods for recording electrodes is further fixed to the double-sided adhesive tape 10, and more ordered recording electrodes are obtained.

After the winding is completed, the pair of winding jigs 1 and 1 are butted so that the cavity groove 2 and the jetty portions 4 and 5 face each other. At this time, the pair of butting jigs 1,
1, a spacer (not shown) for maintaining a predetermined gap between the recording electrodes is interposed between the opposing jetty portions 4, 5 and the recording electrode wire rod 1 of one winding jig 1 is used.
1 and the recording electrode wire rod 11 of the other winding jig 1 are displaced by the diameter (P / 2) thereof and arranged in a zigzag pattern. Then, on both end faces of both winding jigs 1 and 1, the cavity groove 2
A member (not shown) that closes the openings at both ends is attached, and the molten insulating resin is alternately injected into the cavity groove 2 from the resin injection port to form an electrode support block to form the recording electrode wire rod 11 and the control electrode. To fix.

After the casting is completed, the recording electrode wire rods 11 wound around the respective turn pins 9 _L and 9 _R are removed, and then the winding jigs 1 and 1 are divided. The head material hardened with is taken out together with the control electrode holding plate. Then, predetermined processing such as polishing of the head surface is performed to complete the multi-needle recording head.

The above embodiment is one example of the preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, in the present embodiment, the cooling after the winding of the recording electrode wire 11 around the winding jig 1 is performed by natural cooling, but it may be forcibly cooled by a method such as blowing cold air. .

[0026]

As is apparent from the above description, in the method for manufacturing a multi-needle recording head of the present invention, the recording electrode wire is heated before being wound on the winding jig.
Since the slack is removed by contraction after being wound on the winding jig and the groove is prevented from being disengaged by winding with a proper tightening force, straight recording electrodes can be formed at a constant pitch without short circuit.

When a recording electrode wire material coated with a heat-fusible adhesive is used, the recording electrode wire material moves more reliably because it is solidified by the adhesive material in a slackened state. It is possible to prevent the groove from coming off.

Further, when the recording electrode wire rod is wound while being pressed against the double-sided adhesive tape, the recording electrode wire rod wire bites into the double-sided adhesive tape, and at the same time, the adhesive force is increased due to the evaporation of the solvent, so that the double-sided adhesive tape is further improved. The fixing of the recording electrode wire to the recording electrode is strengthened. by this,
It is possible to more reliably prevent the groove of the recording electrode wire rod from coming off.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a nozzle unit of a wire rod supply device used for carrying out a method for manufacturing a multi-needle recording head according to the present invention.

FIG. 2 is a perspective view showing an example of a winding jig used when manufacturing the multi-needle recording head of the present invention.

FIG. 3 is a perspective view showing an example of a winding jig for manufacturing a conventional multi-needle recording head.

FIG. 4 is a plan view showing a winding state, in which (A) shows a good state, (B) shows an out-of-groove state, and (C) shows a loose state.

5 is a cross-sectional view taken along line VV of FIG. 4, showing an arrangement state of recording electrodes, (A) showing a good state, (B) showing a head in a groove-off state, and (C) showing a head in a slack state. Show.

[Explanation of symbols]

 6 Receiving part of winding jig 10 Double-sided adhesive tape 11 Recording electrode wire 20 Nozzle unit 21 Nozzle 22 Heater 23 Heat insulating cover

[Procedure amendment]

[Submission date] February 8, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Further, in the method for manufacturing a multi-needle recording head of the present invention, it is preferable that the conductive wire is heated by a heating unit integrated with the wire rod supply device.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Delete

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

The recording electrode wire 11 heated immediately before being wound on the winding jig is cooled and contracted after being wound on the winding jig 1, so that the slack is removed and an appropriate tightening force is applied. It is wound around the winding jig 1. Therefore, the recording electrode wire rod 11 does not loosen or come off the groove in the portion forming the recording electrode.
As shown in (A), the recording electrodes are formed in a straight line without overlapping at a constant pitch . In further, double-sided adhesive tape 1
In the area of 0, the recording electrode wire material 11 contracts due to the shrinkage of the recording electrode wire material 11 and the recording electrode wire material 11 bites into the double-sided adhesive tape 10 and the solvent is vaporized by heating to the adhesive surface to increase the adhesive force of the double-sided adhesive tape 10. The recording electrode wire is fixed to the double-sided adhesive tape 10 to obtain a more organized recording electrode.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Delete

Claims (4)

[Claims] 1. A wire rod for recording electrode is wound around a groove for holding a wire rod having a constant pitch formed in a winding jig, and the wire rod for recording electrode is arranged in a zigzag pattern, and the surroundings are electrically insulating. A method for manufacturing a multi-needle recording head, which comprises hardening with a resin, wherein the wire for recording electrodes is heated before being wound around the winding jig. 2. The method for manufacturing a multi-needle recording head according to claim 1, wherein the recording electrode wire is coated with a heat-sealing adhesive. 3. The method for manufacturing a multi-needle recording head according to claim 1, wherein the conductor is heated by a heating means integrated with the wire supplying device. 4. A double-sided adhesive tape is affixed between the wire rod holding groove on the winding jig and the wire rod supply device, and the recording electrode wire rod is wound while being pressed against the double-sided adhesive tape. The method of manufacturing a multi-needle recording head according to claim 1.