JPS6320713B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for extracting and dividing electrode wires of multi-needle electrodes used in electrostatic recording devices and the like.

For example, in facsimile machines and printers,
An electrostatic recording device is used to record an image on a recording medium, but this electrostatic recording device has a recording electrode consisting of a large number of extremely thin needle-like electrodes and a minute gap between the electrodes. Opposing auxiliary electrodes are placed close to each other with a recording medium such as electrostatic recording paper interposed therebetween, or a recording head equipped with both recording electrodes and auxiliary electrodes is placed opposite to the recording medium, and these recording electrodes and auxiliary electrodes A voltage containing an information signal is applied between the electrode and the recording medium to perform recording scanning to form an electrostatic latent image on the recording medium, which is then visualized to obtain an information image.

FIG. 1 shows an example of a recording electrode head equipped in such an electrostatic recording device. On the head end surface 1a of this head 1, the end points of a large number of extremely fine needle-like electrodes 2 are arranged in one direction at minute pitches. It is lined up and exposed. An electrode wire 2a of the needle electrode 2 extends from the end surface opposite to the head end surface 1a. The number of needle-shaped electrodes 2 is, for example, 2048, and the end points of the electrodes are arranged, for example, eight in a range of 1 m/m. That is, it corresponds to, for example, the linear density in facsimile.

Such a recording electrode head, so to speak, a multi-needle electrode head, has conventionally been manufactured by the following method. First, as shown in FIG. 2, a single electrode wire is wound around a winding drum 3 having a resin injection mold 3a on its flat upper surface. That is, the drum 3 is provided with a screw-like groove 3b having a predetermined pitch and lead, and a single electrode wire is wound around the drum outer part including this groove as shown in the figure. Then, for example, 1/8 m/m is placed on the resin injection mold 3a.
The electrode wires 2 are stretched linearly at the pitch.

Next, as shown in FIG. 3, the upper mold 4 provided with the resin injection mold 4a is superimposed on the drum 3 around which the electrode wire is wound, and a thermosetting resin, for example, is poured through the injection hole 4b. A sparse mold of the electrode head is formed. After that, the electrode wire is cut from the notch 3c provided in the drum 3, and the mold is opened to form the head end surface 1a.
A multi-needle electrode head as shown in FIG. 1 can be obtained by cutting off the base of the electrode wire slightly extending from the base (see FIG. 1) and smoothing the end surface 1a.

The electrode wire 2a from the multi-needle electrode head 1 is first connected to, for example, a printed circuit board, and then, using this printed circuit board as a relay, is connected to a control circuit that applies a voltage containing an information signal to the multi-needle electrode. . FIG. 4 shows an example of the connection method. In this connection method, for example, eight printed circuit boards _P1 to _P8 are used as shown in the figure.

Now, focusing only on the first printed circuit board _P1 , it is provided with a common connection line L consisting of eight conductors in the horizontal direction. Here, assuming that a total of 2048 electrode wires are embedded in the multi-needle electrode head 1, first, the electrode wire numbers are 1, 9, 17, 25.
... Extracted a total of 256 electrode wires numbered 2041, and attached the ends of these wires to the first printed circuit board P ₁ .
Connect to each V-shaped notch in turn.

Next, a total of 256 electrode wires with electrode wire numbers 2, 10, 18, 26...2042 were extracted, and their ends were
They are connected in sequence to the same 256 V-shaped notches provided on the second printed circuit board _P2 . By repeating these operations from the third printed circuit board _P3 to the eighth printed circuit board _P8 , the 2048 electrode wires are divided into eight printed circuit boards and are all connected. The electrode wires from the head are connected to a control circuit for applying a voltage containing an information signal to the multi-needle electrodes via each printed circuit board connected in this manner.

When connecting the electrode wires from the multi-needle electrode head to each printed circuit board using this method, the first
For printed circuit board P ₁ , 1, 9, 17, 25...
...Electrode wires up to number 2041 must be extracted accurately without making any mistakes in the order, leaving 7 gaps between them. In addition, the second printed circuit board P ₂ to the eighth printed circuit board
The same applies to up to _P8 . In such a multi-needle electrode head, the electrode wires are arranged at an extremely high density, and the pitch is 1/8 mm, or 125 μm, when the linear density is 8 wires per 1 m/m. It is extremely troublesome to count such densely arranged electrode wires one by one and manually extract and sort them in the above order without making any mistakes, and it takes a lot of time to sort them. At the same time, wire breakage may occur during sorting, or the extracted wire number may be incorrect. That is, this results in a decrease in work efficiency, an increase in manufacturing costs, and a decrease in quality.

The purpose of the present invention is to easily extract and classify the electrode wires from a multi-needle electrode head without having to sort them and make mistakes. It lies in the fact that you do it.

Hereinafter, the present invention will be explained specifically and in detail with reference to the drawings.

In FIG. 5, a resin injection mold 11 is opened in the upper flat surface 10a of the wire-wound drum 10 along the axial direction of the drum. Further, the winding drum 10 has a lower flat surface 10b formed on the opposite side of the upper flat surface 10a, as shown in FIG. Furthermore, a large number of groove rows for electrode wire winding are provided on the peripheral portions 10c and 10d on both sides of the wire winding drum 10 in a direction perpendicular to the drum axis direction. These grooves are concentric grooves without leads, and for example, 2048 grooves are carved from _C1 to Ci. The groove has a V-shaped cross section as shown in FIG.

Here, in FIG. 5, one electrode wire _L1 is wound around the winding drum 10 as shown. That is,
The end of the electrode wire _L1 is adapted to be locked in a proper position on the drum 10, and while rotating the drum 10 in the direction of the arrow, the wire _L1 is first connected to the peripheral portion 10c.
Wrap it around the first groove _C1 on the side, and then feed the drum 10 intermittently in the direction of arrow B by a predetermined amount to complete the line.
L ₁ is the nth groove counting from the first groove C ₁ , i.e.
Wrap it around the ninth groove _C9 on the circumference 10d side, and repeat these operations for every ninth groove.

FIG. 8 shows an example of an apparatus capable of automatically winding the electrode wire as described above. This device includes a table 13, a guide rail 14,
Feed screw 15, half nut 16, and bobbin 1
7, main guide pulley 18, and brake member 19
and pulley groups 20, 21, 22, 23, 24,
It is composed of a tension adjustment weight 25 and a drum mounting plate 26.

An electrode wire is wound around the bobbin 17, and the wire from this bobbin is secured to an appropriate portion of the wire winding drum 10 via each pulley.
The drum 10 is driven to rotate in the direction of the arrow by a drive mechanism (not shown), and as shown in FIG. 5, the electrode wire _L1 is wound from point a to point b and then to point c. Now, the table 13 in FIG. 8, which has been stationary until now, is now moving to the left when viewed from the direction of arrow A. This amount of movement is
If the groove pitch is 1/8m/m, it will be 1/m/m.

That is, after the table 13 moves by 1 m/m, the drum 10 starts rotating again in the direction of the arrow, and the fifth
As shown in the figure, the electrode wire is wound around the groove _C9 on the peripheral portion 10d side. As this operation is repeated, the wire is wound around the groove in sequence at seven intervals.

When winding of one electrode wire is completed in this way, the wire is wound diagonally around the lower flat surface 10b of the drum 10, as shown in FIG. At this point, a weaving member such as a weaving tape _T1 is applied to the lower flat surface 10b including the diagonal lines. In this case, the weaving tape may be an adhesive tape.

Next, as shown in FIG. 9, another electrode wire L ₂ is wound using the electrode wire winding device shown in FIG.
As in the previous case, wind the electrode wire L ₂ on the wire drum 1
Wrap it around 0. In this case, the wire _L2 is wound parallel to the wire _L1 on the upper flat surface 10a, and then the wire _L2 is wound around the second groove _C2 on the peripheral portion 10c side. Repeat these operations for every 9th groove. In this case, as shown in Figure 10,
The electrode wire _L2 is wound onto the first weaving tape _T1 .

After winding the electrode wire _L2 , as _shown in FIG.
Lay it on top of the tape T ₁ including the diagonal line of the electrode wire L ₂ . By repeating this series of operations eight times in total, all the electrode wires are wound around all the groove rows of the winding drum 10 shown in FIG.

After finishing this winding, winding drum 1
0 and the upper mold 4 used in the conventional example shown in FIG.
By performing resin casting, a sparse shape of the multi-needle electrode head can be obtained. Next, by cutting the wound electrode wire along the direction of the notch using the notch 10e of the winding drum 10, and removing the electrode wire from this cut portion to the end face of the head, A multi-needle electrode head as shown in FIG. 1 is obtained.

In this case, in FIG. 4, the first printed circuit board
P ₁ Electrode wires 1, 9 of head 1 to be connected
17, 25...256 lines until 2041,
Also to be connected to the second printed circuit board P ₂ ,
Since the 256 electrode wires 2, 10, 18, 26, . . . 2042, and the subsequent wires up to the 8th printed circuit board _P8 have already been extracted and separated using the above-mentioned weaving tape, The electrode wire from the head is
Connection to each printed circuit board can be made easily and without error without separate selection of electrode wires.
In the above embodiment, the electrode wires are connected to each printed circuit board with seven gaps between them, but the spacing is not limited to this, and the intervals can be set as desired. The number of sheets of the weaving table or the method of winding the electrode wire around the winding drum may be determined based on the above. In this case, the eighth
By making the feeding amount of the table 13 variable in the electrode wire winding device shown in the figure, it is possible to select any winding specification with the same device.

As shown in FIG. 11, a pair of wire winding drums 10 and 28 are used to wind the electrode wires in the electrode wire winding grooves of both drums, and resin is applied to the resin injection mold 11 and the upper resin injection mold 29. By pouring the powder, it is possible to obtain a multi-needle electrode head 31 in which the electrode ends are arranged in a staggered manner as shown in FIG. In this case, the groove 28 of the upper winding drum 28
a may be shifted by a predetermined pitch in the axial direction with respect to the groove of the lower drum.

Even when manufacturing such a multi-needle electrode head, the electrode wires can be extracted and separated by laminating a weaving tape using each of the flat surfaces 10b and 28a. Alternatively, a wire winding drum 32 having both grooves 32a as shown in FIG. 13 may be used, and the weaving tape may be laminated on this portion by utilizing the circumferential portion 32b of this drum.
In this case, the electrode wire can be cut using both recesses 32c. Note that the above-mentioned weaving tape may be color-coded.

As described above, according to the present invention, it is possible to extract and classify a large number of electrode wires from a multi-needle electrode head without any errors during head manufacturing without separately sorting them, so the work process is extremely simplified and work efficiency is improved. At the same time, wire breaks that occur during sorting are eliminated, which improves product yield and improves the quality of the head itself.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a multi-needle electrode head used in electrostatic recording devices, etc., Fig. 2 is a perspective view of an example of a conventional wire-wound drum used in manufacturing the above-mentioned head, and Fig. 3 is a perspective view showing an example of a conventional wire-wound drum used in manufacturing the head. A diagram showing an example of a method for forming a head using the same wire winding drum and an upper die, FIG. 4 is a diagram of a method of connecting the electrode wires of the multi-needle electrode head to each printed circuit board, and FIG. 5 is a diagram of the present invention. FIG. 6 is a cross-sectional view of a winding groove formed in the wire-winding drum, FIG. 7 is a perspective view of the wire-winding drum used in the present invention, viewed from the bottom side, and FIG. FIG. 8 is a device configuration diagram showing an example of a winding device for winding an electrode wire around the same winding drum, FIG. 9 is a perspective view showing a mode in which a second electrode wire is wound around the same winding drum, and FIG. Fig. 10 is a perspective view of the above wire winding drum seen from the bottom side, Fig. 11 is a diagram showing an example of a method for manufacturing a two-row staggered multi-needle electrode head, and Fig. 12 is a two-row staggered multi-needle electrode head. FIG. 13 is a perspective view of a multi-needle electrode head having a shape similar to the above, and FIG. 13 is a diagram showing another example of the wire-wound drum used in the present invention. 10, 32...Wire-wound drum, 11...Resin injection mold, _C1 , _C2 ...Ci...Groove array, _L1 , _L2 ...Electrode wire, _T1 , _T2 ...Weaving member.

Claims (1)

[Claims] 1. A large number of groove rows for electrode wire winding, which are substantially orthogonal to the axial direction, are provided on a part of the circumferential direction of the outer shape of a wire winding drum provided with a resin injection mold in the axial direction. Winding the wire in the first groove of the groove row,
After that, the electrode wire is sequentially wound in every nth groove from the first groove, and after winding one electrode wire, it is wound on the part of the winding drum other than the groove row part.
A weaving member is applied through the electrode wire wound around this part, and then another electrode wire is wound in order in every nth groove from the second groove, and then the above-mentioned Apply another weaving member on the identification member, and then repeat these steps one after another to wrap all the electrode wires in the order in which the grooves are arranged, thereby injecting resin into the resin injection mold. When a multi-needle electrode head is molded and the electrode wires are cut, a large number of electrode wires extending from the end of the head are extracted and separated for each weaving member by the above-mentioned weaving members. A method for extracting and dividing multi-needle electrode wires.