JPS6333466B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a facsimile device, an electrostatic recording device,
This invention relates to a manufacturing device for recording heads used in devices similar to these devices.

In facsimile machines and the like, for example, an electrostatic recording head records an image on recording paper, and a suitable developing device develops the written image on the recording paper. In an electrostatic recording head, for example, the end points of electrode needles are regularly arranged in one direction on the end face of the head, and multiple lines of images can be written simultaneously using the electrodes configured in this way. . This electrostatic recording head has an insulated electrode needle held by synthetic resin.
From the viewpoint of resolution, it is said that the cross-sectional shape of the electrode needle exposed on the end face of such a head is not circular but flat and substantially rectangular.
However, copper wires with such a special shape are not marketable. Conventionally, when manufacturing the material for this type of electrode needle, a commercially available copper wire with a diameter of about 0.12 m/m was rolled flat, and then an insulation coating was applied. case,
Since the insulating coating is applied on the flattened material, the insulating coating layer becomes elliptical due to surface tension, making it difficult to arrange the electrodes. Furthermore, in the past, the electrode needle manufacturing process and the head manufacturing process were performed separately and independently, resulting in a drawback that the series of manufacturing processes was cumbersome.

In the present invention, a thin copper wire with a circular cross section, which is a material, is insulated in advance, and then rolled into a flat shape using a pair of rolling rollers, and tension is applied to the rolled insulated copper wire. However, it is an object of the present invention to provide an apparatus for manufacturing a recording head in which the recording head is wound around a winding jig, thereby making the subsequent manufacturing process of the head easy and simple, and in which the insulating coating layer can be made uniform.

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

FIG. 1 shows an example of an electrostatic recording system, in which an electrostatic recording head body 1 consists of a head frame 2 and a recording head 3.
The end points of the electrode needles are arranged at a predetermined pitch in one direction. The recording head body 1 is designed to reciprocate in the direction of the arrow, that is, in the main scanning direction, and when the head moves forward in contact with the recording paper S, an electrostatic charge is applied to the recording paper by the electrode needles. An electrostatic latent image is formed while the recording paper is intermittently fed in the direction of the arrow, that is, in the sub-scanning direction. The end points of the electrode needles are arranged in a staggered manner, as shown in FIG. 2, and the cross-sectional shape is flat in the sub-scanning direction. Next, a method for manufacturing such an electrode needle will be described.

FIG. 3 shows an apparatus for manufacturing electrode needle materials. In the figure, a wire bobbin 6 is wound with a copper wire having a circular cross section and which has been previously insulated. is pulled out from the bobbin 6 and gripped by a pair of rolling rollers 8 via an idling pulley 7. As will be described later, the pair of rollers 8 are each rotated in the direction of the arrow, and by passing through the pair of rolling rollers, the insulating coating layer 9a is coated as shown in FIG. 4a. The formed copper wire 9 is rolled into a flat, approximately rectangular shape as shown in FIG.

The rolled insulated copper wire (hereinafter referred to as an electrode wire) is wound around a winding jig 14 via idler pulleys 11, 12, 13, and the like. Winding jig 1
As shown in FIG. 5, the electrode wire is held at both ends by the centers 15, 15, and by manually rotating the handle 16 in the direction of the arrow, the electrode wire is attached to the winding part 14a of the winding jig 14. Can be wrapped around. Center 15 integrally coaxial with the shaft of the handle 16
A pulley 17 is mounted on the shaft, and a timing belt 19 is stretched between the pulley 17 and the pulley 18. A gear 22 and the lower roller of the pair of rolling rollers 8 described above are mounted on the shaft 21 of the pulley 18 . The rotation of the gear 22 is transmitted to the gear 25 via the idler gears 23 and 24, and the rotation of the gear 25 causes the upper roller of the rolling roller pair 8 to rotate in the direction of the arrow. That is, by rotating the handle 16, the pair of rolling rollers 8 are rotated together in the direction of the arrow in synchronization with the rotation of the winding jig 14 via the timing belt 19 and the gear group, and the copper wire is rolled. The rolling process is performed. In addition,
By driving both rolling roller pairs, the insulation coating layer is protected.

The upper roller of the rolling roller pair 8 is movable up and down, and is fixed at any movable position.
The pressing force during rolling is adjusted as appropriate. The diameter ratio of the winding jig 14 and the rolling roller pair 8 is approximately 1:2, and the rotation ratio thereof is 2:2 due to the rotation transmission mechanism of the pulleys 17, 18 and the belt 19. :1. Therefore, the circumferential speeds of the winding jig 14 and the rolling roller pair 8 are approximately equal, and the thickness of the electrode wire after rolling can be stabilized.
When the rolling roller pair 8 reverses, the thickness of the electrode wire after rolling changes, so in consideration of this, a roller clutch for preventing reverse rotation is provided on the shaft portion of the rolling roller pair. The rolling roller pair 8 is made of induction hardened carbide or high speed steel in order to maintain wear resistance and high precision.

In FIG. 3, a weight 2 is attached to the idler pulley 12.
7 are connected to provide a predetermined tension to the electrode wire after rolling. As shown in FIG. 6, a large number of grooves 14b are carved in the winding portion 14a of the winding jig 14, and a single electrode wire is connected to each other around the jig 14 including these grooves. They are wound in an orderly manner at a distance. The electrode wire wound in this manner can be used as appropriate in the subsequent head manufacturing process. On the other hand, by providing the winding jig 14 with an injection mold part 14c as shown in the figure, recording heads can be obtained continuously after winding is completed. That is, as shown in FIG. 7, one winding jig 14 with the electrode wire wound thereon as described above and another winding jig 28 are prepared in the same manner, and both are overlapped with each other as shown in the figure. , fixed.

Then, resin is injected into both injection mold parts 14c and 28c through injection ports provided at appropriate locations, and is solidified.
By cutting the electrode wires wound around the head, a sparsely molded head 3 as shown in FIG. 8 can be obtained. Next, the base of the electrode wire extending from the upper end 3a of the head sparsely molded product 3 is cut off, and the sparsely molded product is finished to an appropriate size, thereby obtaining a completed recording head.
The end points of the electrode needles of the recording head thus obtained are as shown in FIG. Note that the recording head 3 is attached to a head frame 2 as shown in FIG.
The recording head body 1 shown in the figure is completed by integrally molding the recording head body 1 and finishing the upper end surface into an inclined shape as shown in the figure.

Note that the loosely molded head shown in Fig. 8 may be
A recording head with electrode needles arranged in four rows may be obtained by creating two and joining them together to form a recording head with four rows of electrode needles. The rows may be made of thick electrode needles so that the recording density in a facsimile device or the like can be selectively switched in the same head.

By the way, in the apparatus of the present invention, as shown in FIG. 3, a weight 27 is connected to the idler pulley 12 to apply a predetermined tension to the electrode wire after rolling. By applying tension in this way, the following special effects can be obtained. That is,
In FIG. 3, the shape of the winding jig 14 is not circular but as shown in the figure.
When winding the electrode wire, the tension applied to it changes, but this can be resolved by taking the above measures. On the other hand, when a copper wire is rolled by a pair of rolling rollers, it extends in the longitudinal direction, but in this case,
If the elongation rate is constant, it is sufficient to place the rolling roller pair and the winding jig in a constant corresponding positional relationship. However, copper wires not only have the same diameter, but also copper wires of various diameters may be used, and the material of a single copper wire is not uniform throughout, so The elongation rate changes in each copper wire or in one copper wire, and by taking the above measures, it is possible to absorb such fluctuations in the elongation rate.

As described above, in the device of the present invention, the weight of the weight 27 is used as the tension applying means, but in this case, another means such as an elastic member such as a spring can be used, but this method does not , the spring pressure changes, whereas in the method using a weight, the tension applied to the copper wire can always be kept constant. In the apparatus according to the embodiment of the present invention, the winding jig is manually rotated, but it may be automatically rotated by a drive motor or the like.

As described above, according to the present invention, it is possible to use a commercially available copper wire with a circular cross section, and since the copper wire that has been subjected to insulation coating treatment is rolled, the insulation coating layer can be coated with a uniform thickness. It can be made into In addition, since tension is applied by means such as a weight to the insulated copper wire between the winding jig and the pair of rolling rollers, the winding force of the insulated copper wire to the winding jig is evenly distributed. can do. Furthermore, the manufacturing process of the head after being wound around the winding jig is easy and the manufacturing process is simplified.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an embodiment of the electrostatic recording method, and FIG. 2 is a plan view showing the arrangement of the end points of the electrode needles of the recording head, which is obtained by the present invention.
FIG. 3 is a schematic configuration diagram of an embodiment of the device of the present invention, FIGS. 4 a and b are sectional views along the same line before and after rolling the electrode wire, and FIG. 5 is a perspective view showing the drive mechanism of the device of the present invention. , FIG. 6 is a perspective view showing an example of one embodiment of the winding jig, FIG. 7 is a front view showing a mode in which two winding jigs are combined during head manufacturing, and FIG. 8 is a sparse molding of the head. FIG. 8... Rolling roller pair, 12... Idle pulley, 1
4... Winding jig, 27... Weight.

Claims (1)

[Claims] 1 Hold an insulated copper wire with a circular cross section,
A pair of rolling rollers that roll the insulated copper wire into a flat shape by rotating with each other, and a large number of rolling rollers that rotate in substantially synchronization with the rolling roller pair and wrap the rolled insulated copper wire. A winding jig is provided with an injection mold part that is open to the outside with the winding part in which the groove is engraved approximately in the center, and the rolled wire is located between the winding jig and the pair of rolling rollers. 1. An apparatus for manufacturing a recording head, comprising means for applying tension to an insulated copper wire.