JP2837793B2 - Method of manufacturing multi-needle recording head - Google Patents

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, in the present invention, in order to arrange two rows of recording electrode wires in a staggered pattern at a constant pitch and to solidify them with an electrode support block such as an electrically insulating resin, the recording electrode wires are wound on a winding jig. It relates to improvement of a winding method.

[0002]

2. Description of the Related Art In general, a multi-needle recording head used in an electrostatic recording system has M pairs of M × N first recording electrodes, each of which has a set of M, and a predetermined interval in parallel with the first electrodes. M × N second recording electrodes are arranged at a high pitch at a constant pitch, and are hardened by an electrode support block of an electrically insulating resin or the like so as to expose the respective end faces.

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 using two winding jigs 301 as shown in FIG. (Japanese Unexamined Patent Publication (Kokai) No. 2-239953). The winding jig 301 has a cavity groove 305 into which the control electrode 100 is set and the resin for the electrode support block is poured, and a cavity groove 305 crossing the cavity groove 305.
And a wire holding groove 309 for arranging the wire 200 for recording electrodes formed on the ridges 306, 307, 308 at the edge of the wire at a constant pitch, and hooking the wire 200 on both side walls of the winding jig 301 in an arbitrary direction. And an orienting pin 302, a bundle pin 303, and a turn pin 304 so as to be able to be routed to a position. This winding jig 301
After the control electrode 100 is set in the cavity groove 305, one recording electrode wire 200 is alternately wrapped around the pins 302, 303, 304 on both sides, and continuously wound so as to cross the cavity groove 305. M × N recording electrode wires 200 are stretched over the cavity grooves 305 at a constant pitch so as to be bundled for each recording electrode belonging to the group.

The wire 200 is wound around the winding jig 301 by utilizing the reciprocating linear movement of the wire guide means 311 in the axial direction (the direction indicated by the arrow) and the swing of the winding jig 301. While applying a certain amount of tension to the recording electrode wire 200 by a back tension mechanism (not shown), the wire is drawn by the nozzle 312 of the wire feeder 310 and the predetermined pin 30 is drawn.
, 30,..., 30
This is done mechanically by hooking the wire 200 on 9. Then, in the same manner, the two recording grooves and the control electrode are set against another winding jig (not shown), and the two butted cavity grooves 305 and 3 are similarly set.
The resin is poured into the space formed between the electrodes 05 to form the electrode support block 103. In the space formed by the butted cavity grooves 305, the first and second recording electrode wires 200, 200 and the control electrode 10 are formed.
The electrodes 0 and 100 are arranged at the center in parallel with each other and in a certain positional relationship, and the resin constituting the electrode support block is injected around the center. Then, after the electrode support block is solidified, the bundle of wires 200 is removed from the turn pins 304, and the multi-needle recording head is taken out from the winding jig 301.

[0005]

However, in this conventional winding method, as shown by the phantom line in FIG.
02, the direction of the recording electrode wire 200 is changed toward the wire holding groove 309 to be wound, so that the recording electrode wire 200 wound around the wire holding groove 309 away from the pin 302 Has a large penetration angle θ. For this reason, when a tension for winding is applied to the recording electrode wire 200 that is about to enter the wire holding groove 309 obliquely, the recording electrode wire 200 is
Is displaced toward the shortest course, that is, in a direction in which the penetration angle θ approaches 0 (see FIG. 4B), or detaches from the wire holding groove 309 due to some shock or external force applied after the completion of winding. (See FIG. 3, the right jetty 307 and the central jetty 306 or the central jetty 306 and the left jetty 3
08, the recording electrode wire between the wire holding grooves 309, 309) is loosened, and the positioning accuracy of the recording electrode wire 200 becomes extremely poor (FIG. 4C). In addition, N (for example, 55) recording electrode wires 200 are distributed and wound around from one orientation pin 302 to the wire holding grooves 309 of the jetty portions 307 and 308, and thus are wound.
After the winding is completed, the recording electrode wire 200 is loosened due to the collapse of the recording electrode wire 200 at the pin 302, and the recording electrode wire 200 is loosened.
In such a case, there is a risk that the position accuracy of the wire 200 in the portion constituting the recording electrode may be disturbed by causing the groove to be removed. Etc. These Symbol <br/> record slack and Mizohazure of the electrode wire 200, as shown in (B) and (C) in FIG. 5, the linearity defect or pitch defective recording electrodes, serious, such as short-circuit failure Improvements are desired to cause serious failures.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a multi-needle recording head capable of preventing a recording electrode wire from being loosened or coming off a groove while being wound around a winding jig.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cavity groove for injecting an electrically insulating resin, a pin for wrapping a recording electrode wire wound around the groove, and a method of forming the cavity groove. Using a winding jig having a wire holding groove for holding the recording electrode wire at a constant pitch on both side edges, the first and second recording electrode wires are arranged in a zigzag pattern at a constant pitch. In a method for manufacturing a multi-needle recording head, the periphery of which is solidified with the electrically insulating resin, the recording electrode is provided between the wire holding groove and the pin.
Provide a receiving part that comes into contact with the
An adhesive substance is provided on the surface, and the recording electrode wire is fixed to the recording material while being wound around the winding jig. Examples of the viscous adhesive material preferably used for the double-sided adhesive tape, and further towards the surface than the surface to be adhered to the winding jig is bonded to the recording electrode wire adhesive force is large double-sided adhesive tape Use is preferred.

[0008]

Therefore, even if the recording electrode wire attempts to enter the wire holding groove from a direction that is greatly inclined, the recording electrode wire is fixed between the wire holding groove and the pin, and then wound around the wire holding groove. Therefore, the intrusion angle θ is intruded in the same state as 0. For this reason, there is no displacement between the pin of the recording electrode wire and the wire holding groove, and furthermore, no displacement in the wire holding groove. In this case, the recording electrode wire is fixed by adhesion using an adhesive material provided on the accepted portion. If a double-sided adhesive tape is used as the adhesive material and the adhesive force to the receiving part of the winding jig is weaker than the adhesive force to the recording electrode wire, a multi-needle recording head is manufactured and the winding Even when it is removed from the tool, it remains fixed to the recording electrode wire, so that the bundled relationship does not fall apart.

[0009]

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

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

For example, one of the preferred winding jigs to be used is as shown in FIG. The winding jig 1 includes a cavity groove 2 for casting an electrically insulating resin to form an electrode support block, a wire rod holding groove 3 for holding a recording electrode wire 11, and a recording electrode wire 11. the entangled orientation pin 7 _L, 7 _R, bundled pins 8 _L, 8 _R and Tanpin 9 _L, 9 directed pins and wire holding groove 3 of _R pins 7 _L, 7 recording electrodes with the _R Each of the pins 7 _L , 7 _R , 8 has a receiving portion 6 for supporting the wire 11.
_{L, 8 R, 9 L,} 9 by utilizing the _R is obtained as multiplied repeatedly winding a single recording electrode wires 11 so as to cross the cavity groove 2.

The wire holding groove 3 is provided on the upper surface of the ridges 4 and 5 on both sides of the cavity groove 2 in a direction crossing the cavity groove 2. The wire holding groove 3 is a V-shaped groove having a depth and a width substantially equal to the diameter of the recording electrode wire 11, and is formed at a pitch substantially equal to twice the diameter. Further, on the outer side of the ridges 4 and 5 on both sides, the direction setting pins 7 _L and 7 _R for directing the recording electrode wire 11 and the same type of recording electrode wire 11 divided into blocks are grouped. Turn pins 9 _L and 9 _R are provided to entangle the bundle pins 8 _L and 8 _R and the recording electrode wire 11 and to turn them, and these pins 7 _L , 7 _R , 8 _L , 8 _R , 9 _L and 9 _R are used. The position and the direction of the wire 11 to be stretched are changed.

Further, the receiving portion 6 is in contact with the recording electrode wire 11 bridged between the wire holding groove 3 and the orienting pins 7 _L , 7 _R and is oblique to the wire holding groove 3. The recording electrode wire 11 is disposed on an extension of the wire holding groove 3 as much as possible so as to prevent the recording electrode wire 11 from slipping sideways, thereby preventing the recording electrode wire 11 from being obliquely hooked on the wire holding groove 3. In the case of the present embodiment, the receiving portion 6 is formed of an arc-shaped projection that protrudes like an eave, and abuts the recording electrode wire 11 in almost the entire area. The receiving part 6 does not need to be an arcuate curved surface as shown in the figure, and may be a projection, for example, a square, which contacts at one point in some cases. A double-sided adhesive tape 10 is adhered to the receiving portion 6 as an adhesive substance. 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 11 from being disturbed when the recording electrode wire 11 or the like solidified by the electrode support block is taken out from the winding jig 1 after 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 strength between the front surface and the back surface is used, a small amount or a thin coating of a release agent is applied to the receiving portion 6, or a film of a material that is difficult to adhere such as Teflon is formed on the receiving portion 6. ing.

On the other hand, a wire feeder for feeding the recording electrode wire 11 to the winding jig 1 is not specifically shown, but has a configuration as shown in FIG. It is preferable to use one provided so as to supply the nozzle unit with a constant back tension. Note that this nozzle unit is mounted on a feed mechanism that gives a reciprocating linear motion along the winding jig 1.

Using such a winding jig 1, a multi-needle recording head is obtained as follows.

First, before starting to wind the recording electrode wire 11 around the pair of winding jigs 1, necessary components such as control electrodes are required at predetermined positions of the cavity grooves 2 of each winding jig 1. Is accommodated according to.

Then, for example, a recording electrode is applied to each of the pins 7 _L , 7 _R , 8 _L , 8 _R , 9 _L , 9 _R of the winding jig 1 using a wire feeder having a nozzle unit as shown in FIG. By winding or hooking the wire 11 for recording, the wire 11 for recording electrodes is laid across the cavity groove 2 while being aligned at a constant pitch in the M × N wire holding grooves 3. The winding of the recording electrode wire 11 around each of the pins 7 _L , 7 _R , 8 _L , 8 _R , 9 _L , 9 _R is not particularly important in the present invention, so a detailed description is omitted. While being moved in the direction perpendicular to the wire holding groove 3 while being wound N times around one turn pin and the wire bundling pin, the wire is distributed to the N wire holding grooves 3 using the N direction setting pins while being wound. Done. By repeating such an operation, M × N (for example, 7040) recording electrode wires 11 are all wound. At this time, the recording electrode wire 11 is guided to the position of the corresponding wire holding groove 3 by the movement of the nozzle, and then wound while being pressed against the double-sided adhesive tape 10 of the receiving portion 6. Therefore, as shown by the solid line in FIG.
Since the wire enters the wire rod holding groove 3 in the same state as the penetration angle θ is 0, it is adhered to the double-sided adhesive tape 10 and the penetration angle θ is 0.
And is wound around the winding jig 1 while being fixed.
As a result, the recording electrode wire 11 is wound around the wire holding groove 3 of the winding jig 1 so as not to come off, and no displacement occurs thereafter. Further, even after the winding, the recording electrode wire 11 is fixed with the double-sided adhesive tape 10 so that it does not loosen. Therefore, since the recording electrode wire 11 does not loosen or lose its groove in the portion constituting the recording electrode, as shown in FIG. 4A and FIG. Is configured.

After the winding is completed, the pair of winding jigs 1 and 1 are brought together so that the cavity grooves 2 and the ridges 4 and 5 face each other. At this time, a spacer (not shown) for maintaining a predetermined gap between the recording electrodes is interposed between the opposed ridge portions 4 and 5 between the pair of butted winding jigs 1 and 1 and one of the ridge portions 4 and 5 is provided. The recording electrode wire 11 of the winding jig 1 and the recording electrode wire 11 of the other winding jig 1 are displaced by the diameter (1/2 pitch) in a staggered manner. Thereafter, members (not shown) for closing both ends of the cavity groove 2 are attached to both end surfaces of the two winding jigs 1, 1, and the insulating resin melted alternately into the cavity groove 2 from the resin injection port is injected. Then, an electrode support block is formed, and the recording electrode wire 11 and the control electrode 12 are fixed.

After the casting is completed, the recording electrode wires 11 wound around the turn pins 9 _L and 9 _R are respectively removed, the winding jigs 1 and 1 are divided, and the head material is taken out from each cavity groove 2. . Then, a predetermined process such as polishing the head surface is performed to complete the multi-needle recording head. Here, as shown in FIG. 2, the multi-needle recording head comprises a recording electrode wire 11 and a control electrode 12 fixed by an electrode support block 13. The control electrode 12 is supported by a wiring board 14, and the electrode support block 13 is reinforced by a reinforcing plate 15. At this time, the double-sided adhesive tape 10 adhered to the receiving portion 6 is peeled off from the winding jig 1 and removed while being adhered to the recording electrode wire 11 side. Therefore, in the multi-needle recording head as shown in FIG. 2, the recording electrode wires 11, 11 are not adhered to each other by the double-sided adhesive tape 10, and the binding relationship does not fall apart.

The above embodiment is one preferred embodiment of the present invention, but the present invention is not limited to this embodiment, and various modifications can be made without departing from the gist of the present invention.

[0021]

As is apparent from the above description, in the method of manufacturing a multi-needle recording head according to the present invention, a receiving portion which comes into contact with the recording electrode wire is provided between the wire holding groove and the pin.
In both cases, an adhesive substance is provided on the surface of the
Since as wrapped around the winding jig while fixing the recording electrode wire by material, even trying to break from the direction in which the recording electrode wire is largely inclined relative to the wire holding groove, to the groove for the appropriate wire holding Since the guided recording electrode wire is fixed and wound between the wire holding groove and the pin with the penetration angle θ being equal to 0, the recording electrode wire is inserted into the wire holding groove without causing the groove to come off. And no displacement occurs afterwards. For this reason, the recording electrode wires can form recording electrodes arranged at a constant pitch on a straight line. Moreover, a wire for the recording electrode
Is fixed by an adhesive substance, so that the recording electrode wire
The fixing is strengthened more, preventing the groove from coming off and loosening more reliably.
You.

[0022]

Further, in the case where a double-sided adhesive tape is used as the adhesive substance, in which the adhesive force to the receiving portion of the winding jig is weaker than the adhesive force to the recording electrode wire, the recording electrode wire can be used even after release. Since they are fixed with double-sided adhesive tape, the binding relationship is maintained and there is no danger of disconnection.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a winding jig used for manufacturing a multi-needle recording head of the present invention.

FIG. 2 is a cross-sectional view illustrating an example of a multi-needle recording head manufactured by the method of the present invention.

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

FIGS. 4A and 4B are plan views showing a winding state, where FIG. 4A shows a good state, FIG. 4B shows a state in which a groove is removed, and FIG.

5 is a sectional view taken along line VV of FIG. 4, showing the arrangement of the recording electrodes; FIG. 5A shows a good state, FIG. 5B shows a head in a groove out state, and FIG. Show.

FIG. 6 is an explanatory view of a state in which a recording electrode wire is wound.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Winding jig 2 Cavity groove 3 Wire rod holding groove 6 Receiving part of winding jig 7 _L , 7 _R pin 10 Double-sided adhesive tape 11 Wire for recording electrode

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B41J 2/235 B41J 2/24

Claims (3)

(57) [Claims] 1. A groove for injecting an electrically insulating resin, a pin for winding a recording electrode wire wound around the groove, and a wire for holding the recording electrode wire at a constant pitch on both side edges of the cavity groove. A multi-needle recording head in which first and second recording electrode wires are arranged in a zigzag pattern at a constant pitch using a winding jig having a holding groove, and the periphery thereof is solidified with the electrically insulating resin. In the manufacturing method, the recording electrode is provided between the wire holding groove and the pin.
Provide a receiving part that comes into contact with the
A method for manufacturing a multi-needle recording head, comprising: providing an adhesive substance on a surface; and winding the recording electrode wire around the winding jig while fixing the recording electrode wire with the adhesive substance . 2. The adhesive substance is a double-sided adhesive tape.
2. A multi-needle recording head according to claim 1, wherein:
Method. 3. The double-sided adhesive tape is adhered to a winding jig.
The surface to be bonded to the recording electrode wire is better than the surface to be
3. The multi-needle stylus according to claim 2, wherein the adhesive strength is large.
Manufacturing method of recording head.