JPS61141571A - Recorder - Google Patents

Abstract

PURPOSE:To eliminate the need for adjustment in fitting a recording head and a support plate and enhance productivity, by fitting the recording head to the support plate so that a recording line is located on the upstream side of a tangent line of the head and a platen. CONSTITUTION:The support plate 10 is moved in the direction of an arrow C, and a notched part 10c is engaged to a bearing 12, whereby a heating line 9 is pressed against the platen 5. At this time, the position of the notched part 10c accords with the position of the bearing 12, whereby the accuracy of the position of the support plate 10 relative to the platen 5 is secured. The recording head 6 is brought into contact with the platen 5 in the condition wherein the position of the heating line 9 is deviated from the tangent line of the head 6 and the platen 5 to the upstream side with respect to the moving direction of a recording paper by an amount (r). Accordingly, printing can be performed even where the head 6 and the support plate 10 are fitted without any adjustment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Scope of Industrial Application] The present invention relates to a recording apparatus, and more particularly to a recording apparatus that performs recording on a recording material by pressing a recording head having a recording means and a platen through a recording material.

[Prior Art and Problems to be Solved by the Invention] Conventionally, as this type of recording device, there is a thermal type recording device used, for example, in the recording section of a facsimile machine, which has been widely used recently. In this type of recording apparatus, recording is performed by pressing a linear recording line against a cylindrical platen.

Therefore, in order to uniformly press the entire recording line against the recording paper and perform proper recording, the conventional apparatus was configured such that the position of the recording line 9 coincided with the tangent between the platen 5 and the recording head 6. .

Therefore, the recording head holding structure needs to have high positional accuracy. Therefore, there is a problem in that the positional accuracy must be improved and it is troublesome to maintain it.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and has a configuration that can be easily and inexpensively produced in the above-mentioned type of recording device, guarantees the positional accuracy of the recording means of the recording head, and performs recording with high quality. The purpose is to provide a recording device that can.

Means for Solving Problem C] The present invention achieves the above object in a recording apparatus that performs recording by pressing a recording head having a recording means and a cylindrical platen through pressure contact via a recording material, in which the recording means is The present invention provides a recording apparatus characterized in that the recording head is located near the tangent between the recording head and the platen and on the upstream side in the running direction of the recording material.

〔Example〕

Below, 7Aximi IJ is shown as an example of this type of recording device.
Taking the device F as an example, the configuration of its main parts will be explained using FIGS. 1, 2, and 4.

In the figure, reference numeral 1 indicates a storage section provided within the device. A roll paper 3 in which a recording paper 2 is wound is stored in the storage section 1.

The recording paper 2 unwound from the roll paper 3 is moved to the guide roller 4
is guided between the platen 5 and the recording head 6.

The platen 5 is a roller formed in a cylindrical shape, and is rotated in the direction of the arrow by a driving means (not shown) to feed the recording paper 2 in the direction of the arrow B and discharge it out of the apparatus.

On the other hand, the recording head 6 is formed in the shape of an elongated thick plate, and is attached to a cover 7 that can be opened and closed for exchanging the roll paper 3. When the cover 7 is closed, the biasing force of a spring 8 causes the recording head 6 to be attached to the platen. 5. A recording line 9, which is a linear recording means, is provided on the surface of the recording head 6 on the platen 5 side. Note that in this embodiment, heating elements arranged in a straight line are used as recording lines;
The invention is not limited to this, but can also be applied to multi-stylus-shaped electrostatic recording heads.

Furthermore, microscopically, these recording means are not necessarily arranged in a straight line, but may be arranged in a grid pattern, for example. And when recording, platen 5
One rotation in the direction of arrow A causes the recording paper to be sent in the direction of arrow B, and the recording line 9, which is in pressure contact with the recording paper 2 on the platen 5 due to the biasing force of the spring 8, generates heat according to the information, and the recording paper Recording is performed on 2.

Next, the holding structure of the recording head used in this embodiment is shown in FIG. 2 and will be described. Here, thermal paper is used as the recording paper,
An example in which a heat generating head is used as the recording head will be shown.

In the same figure, a heat generating head is indicated by the reference numeral 6, and includes a long and thin metal base 6a, a ceramic substrate 6b fixed on the metal base 6a, and a heating head provided linearly on the ceramic substrate 6b. It consists of a heat generating line 9. Positioning holes 6c, 6c are formed in the metal base 6a.

Further, the reference numeral 10 is a holding plate that holds the recording head 6, and the cross section is bent into an abbreviated shape, and screw holes 10a and lQa are formed at the tip end on the side where the interrupted plane is shown. . The screw 11. The recording head 6 is fixed to the tip of the holding plate by IIK. Further, a retaining portion 10b is protruded from the tip of the holding plate 10 on the side bent downward in the figure, and a semicircular notch 10c is formed approximately in the center of this engaging portion 10b. ing. The diameter of this notch 10c is approximately equal to the diameter of the bearing 12 that supports the shaft 5a of the platen 50 facing thereto.

In addition, the inner diameter of the positioning hole 6C and the screw hole 10a is the screw 11.
It is approximately equal to the outer diameter of , and is larger by the minimum clearance required for fixing.

With the above configuration, the holding plate 10 moves in the direction of arrow C, and the notch 10C engages with the bearing 12, so that the heat generating line 9 comes into pressure contact with the platen 5. At this time, notch 1
By matching the position of 0c with the position of the bearing 12, the positional accuracy of the holding plate 10 with respect to the platen 5 is ensured.

In this embodiment, FIG. 1, FIG. 2, and FIG.

As shown in Figure 4, the contact a[1] between the recording head 6 and the platen 5
5, the position of the heating line 9 is r (for example, about 10.3
The recording head 6 is brought into contact with the platen 5 while being shifted upstream with respect to the traveling direction of the recording paper by a distance of about 1 mm).

As a result, according to this embodiment, even if the recording head 6 and the holding plate 1o are attached without adjustment, printing will not become impossible. Therefore, according to this embodiment, the recording pad and the holding plate can be attached without adjustment, improving work efficiency.

The reason for this will be explained using FIG. 3. As shown in the figure, the platen 5 is not pressed by the recording head 6 and is rotating clockwise in the figure. For this reason, the nip of the platen 5 is small on the downstream side with respect to the traveling direction of the recording paper, and becomes large on the opposite upstream side, as shown by the solid line in the figure. When the pressing force is 00, the deviation amount of the heating line 9 from the tangent line 20 of the recording head 6 and the platen 5 in the recording paper traveling direction is p1.If the deviation amount in the opposite direction is q, then the maximum value of the printing ability deviation pmaX ,
The relationship of qmax is T;)wax<qmax. That is, the margin of deviation of the heating line 9 from the tangent between the recording head 6 and the platen 5 is pmmx in the recording paper advancing direction and qIlaX in the opposite direction, where pmaX < qm
It is ax. Therefore, by setting r=~Qmax-f'max, the margin of deviation can be made equal to 9m*x''Qma- in both the recording paper advancing direction and the reverse direction.

In terms of actual measurements, when the pressing force is 31cg and the rubber hardness of the platen is 40°, p-1x = 0.4. m m qma
, ==Qtma* 9max =Q+3 1,0 mm Since m, r-111□---.

If it is expressed as mm, the margin of deviation is p ffL &
* + (l la @ == 0.7 rn f
l'11 Sunawachi, 0 in both recording paper advancing direction and reverse direction.
7 mm can be taken. This is the maximum error of 0.6 when the recording head 6 and holding plate 10 are installed without adjustment.
mm smaller than m. Therefore, the recording head 6 and the holding plate 10
Printing will not become impossible even if installed without adjustment.

In the above embodiment, linearly arranged heating elements are used as the recording means, but the present invention is not limited to this, but can also be applied to a so-called electrostatic recording head using a multi-stylus as the recording means. It is possible. Furthermore, microscopically, these recording means are not necessarily arranged in a straight line, but may be arranged in a grid pattern, for example. Further, the platen is not limited to a roller as shown in the embodiment, but may be a belt-shaped platen suspended on a pulley. Furthermore, the recording material is not limited to paper, but also includes, for example, plastic sheets.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in the above-described recording apparatus, the recording head is attached to the holding plate so that the recording line is located upstream in the recording material traveling direction from the tangent between the recording head and the platen. The structure is simple, and installation of the recording head and holding plate requires no adjustment. This improves productivity and reduces costs. Furthermore, since the torque of the platen drive motor can be reduced, costs and power consumption can be reduced, as well as noise and heat generation.

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view schematically showing the configuration of the main parts of the recording device;
FIG. 2 is a partial sectional view showing the position of the recording head of this embodiment, FIG. 3 is a partial sectional view showing the state of the platen nip,
FIG. 4 is a perspective view of an apparatus to which an embodiment of the present invention is applied. In the figure, 6...Heating head 6a...Metal paste 6b...
・Ceramic substrate 9...Heating line 10...Holding plate 10a...
Screw hole 10b...Engagement part IQc...Notch part

Claims (3)

[Claims] (1) In a recording apparatus that performs recording by pressing a recording head having a recording means and a cylindrical platen through a recording material, the recording means is located near the tangent between the recording head and the platen and upstream in the running direction of the recording material. A recording device characterized by being placed on the side. (2) The recording device according to claim (1), wherein the recording means is a linearly arranged heating element. (3) Claim No. 3, wherein the platen is a roller (
The recording device described in item 1).