JPS5839480A - Printing mechanism - Google Patents

Abstract

PURPOSE:To facilitate the adjustment of a clearance between a ribbon mask and a printing section at low cost by combining a guide plate and a platen into one member with a convex section provided on the printing section of the guide plate alone. CONSTITUTION:A cut form 1 being carried in the direction of the arrow A with a conveying roller 5 is conveyed along a guide plate 2 into a convex section 3, namely, the printing position. Then, the cut form 1 is printed on the convex section 3 with a print head 4. Here, the existence of the convex section 3 on the guide plate 2 enables the regulation of a clearance 7 between a ribbon mask 6 and the guide plate 2 thereby facilitating the setting of the clearance between the ribbon mask 6 and the convex section 3 at a specified value.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inventive printing mechanism, and particularly to a printing mechanism of an impact printer.

It is used as an output device for Impact Printer's electronic computer, but when handling cut forms with conventional impact printers, the guide plate that guides the cut form to the printing section and the print receiver are two parts of the platen. Parts were needed.

The present invention is characterized in that the guide plate and platen, which are two members in conventional impact printers, are combined into one member by providing a slightly raised portion only in the printing area of the guide plate.

That is.

Embodiments of the present invention will be described in detail below with reference to the drawings.

tIh1 is a side view showing a printing section of an impact printer which is an embodiment of the present invention, and FIG. 2 is a perspective view showing a guide plate which is a main part thereof. In the figure, 1 rod cut 7 ohm, 2 is guide plate S is guide plate 2
4 is a print head, 5 Co. cut form conveyance roller (hereinafter simply referred to as "conveyance roller"), and 6 is a ribbon mask.

Guide plate) 2Fi metal plate such as iron plate, aluminum plate, or plastic plate φ is made of a suitable combination of these materials, and as shown in the 2nd WJK, its details correspond to the print wire of the print head 4. It has a convex portion 3 which is a little larger than the other part.

In the case of a metal plate, this convex portion 3 is formed by pressing, etc.
In the case of a plastic plate, it can be formed by heat molding (including press working) or the like.

The shape of the convex portion 3 is such that when the 7 ohm 1 is conveyed in the direction of the arrow by the conveyor ν-ra δ, the convex portion 3 is shaped like a smooth Vc.
It has an appropriate slope so that the cassiform 1 can be transported stably, and its height is also set so that the cassiform 1 can be transported stably.
Transport p-ra 6th place I! It is busy so that it is approximately the same as (height).

The functions and effects of the apparatus of this embodiment configured as described above will be explained below.

Cut 7 conveyed in the direction of arrow A by the conveyor 4-ra δ
One ohm is conveyed along the guide plate 2, and is fed into the convex portion 3, that is, the printing position. The cut form 1 is fed into the printing section t, and is printed on the convex portion by the print head 4 of one company.

At this time, the convex IF [! 3rd grade
By adjusting the gap 7 between the ribbon mask 6 and the guide plate 2, the gap between the ribbon mask 6 and the convex portion 3 at the printing position is adjusted. 8Yt can be set to a predetermined gap. This eliminates the need for the conventional high precision ribbon mask 60 component precision tube that has the guide function of the ink ribbon, the guide function of the cut 7 ohm 1, and it is possible to reduce the cost of the ribbon mask 6. It is something to do.

Furthermore, by providing the convex portion 3 on the guide plate 2, the strength of the guide plate 20 can be significantly improved, so that it can sufficiently withstand the strong impact force of an impact printer, and at the same time, the strength of the guide plate 20 can be significantly improved. It also has the effect of reducing vibration. This has the effect of reducing noise during printing in an impact printer.

Furthermore, as mentioned above, there is a slight protrusion 53 on the guide plate 2.
By providing t- cut by ink ribbon 7o^
The effect of reducing the number of smudges is also significant.The various effects of the present example device described above are that, like a high-speed printer or a company kanji printer, the amount of smudges per unit time is increased. In this case, it is necessary to reduce the gap between the print head 4 and the print receiver (in this case, the convex portion 3), which makes the print even more conspicuous.

In addition, in an impact printer that has a mechanism that automatically adjusts the gap between the print head and the print receiver according to the thickness of the cut form, if the printing spatula is brought into contact with the print receiver once, but if it becomes stiff. , all of the convex parts having a radius equal to # can be brought into contact with the printed characters, so automatic printing can be performed at truly necessary locations.

It has the advantage of being adjustable.

In addition, in the examples shown in FIG. 1 and FIG. 2, the cut form l is guided horizontally, but in this case, the guide plate 2 is installed diagonally or vertically, and the guide plate 2 is installed at right angles to this □. By installing a print head in the cut form l
The guiding direction has a large degree of freedom.

As described above, according to the present invention, the guide plate and platen, which were two members in the conventional impact printer, are combined into one member by providing a slight convex portion only in the printing area of one guide plate. By doing this,
This provides a number of effects as shown below.・(1) The guide plate and platen, which used to be separate parts, can now be replaced with only one part, which will reduce costs.゛(2) Adjust the gap between the ribbon mask and the printing section! t, and the required firing accuracy of the ribbon mask decreases, making it possible to reduce costs.

■) Since the strength of the guide plate itself is increased, the vibration during printing is reduced, which reduces the noise during printing. What you can do.

[Brief explanation of the drawing]

Fig. fIE1 is a perspective view showing a printing section of an ink printer which is an embodiment of the present invention, and Fig. II12 is a perspective view showing a guide plate which is an essential part thereof. 1: Cut form, 2! Guide plate, 3: convex,
Patent Applicant: Hitachi, Ltd. Figure 1 Figure 2 Procedural Amendment (菰) Person who amends the indication of the case 2; ``II ' +5IQ) Stock Company!
Hitachi manufacturing facility fee 21 3 lIJ
Osamu Katsu Shigeyo Residence Address: Too 5 Marunouchi-chome, Chiyoda-ku, Tokyo
No. 1 Hitachi, Ltd. Telephone East M 435-4
221 correction target bright #1 tatami = 42

Claims (1)

[Claims] A printing mechanism for an impact printer having a guide plate for guiding a ticket between a print head and a print receiver, characterized in that a slight convex portion is provided only at the print position of the guide plate.・