JPS5854989B2 - sequential printer - Google Patents

Description

[Detailed description of the invention] The present invention relates to a matrix type sequential printer.

Conventionally, this type of general sequential printer cannot print certificates and other special printing media in capital letters, which is a strong demand from customers.

In addition, in order to meet the customer's request, special typefaces must be installed on the typehead, which has a limited number of characters, so some of the general characters or symbols specified in JIS etc. must be installed. There was a drawback that had to be omitted.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional type, and therefore, an object of the present invention is to make it possible to newly print uppercase characters in the above-mentioned sequential printers which have a limited number of printed characters. To provide a new sequential printer capable of printing general characters and codes as well as uppercase letters without omitting the general characters or codes installed in the printer and without adding a special type head. It is in.

The above-mentioned object of the present invention is to provide a type head which is provided with a plurality of types of matrix type including small dot type and which moves on a guide rail at a pitch that is an integral multiple of the first minimum movement unit to perform printing in the line direction of a print medium. and a printing medium feeding means for moving the printing medium in the column direction at a pitch that is an integral multiple of a second minimum movement unit, the first and second minimum movements of the print head and the printing medium feeding means. By selectively driving the type head for each unit pitch movement, the small point type is set to one dot on the print medium and the first and second minimum unit movement pitches are set to one dot in the row direction and the column direction, respectively. This is achieved by a sequential printer characterized by printing pixel-type characters formed by a dot matrix with distances between dots in different directions.

That is, the present invention appropriately sets the minimum feed pitch of the printing medium and type head of a sequential printer, and also uses so-called matrix printing and pixel type printing in combination for character printing. It is a sequential printer that can print general characters, codes, and uppercase letters without making any changes to the printer.

In other words, the present invention enables character printing by so-called pixel printing in a conventional sequential printer by finely dividing the feed pitch of the printing medium and the type head, and This is a sequential printer that can also print characters by so-called matrix printing by appropriately selecting .

Next, a preferred embodiment of the present invention will be explained in detail with reference to the drawings.

Referring to FIG. 1, which is a schematic configuration diagram of a sequential printer according to the present invention, as is well known, the print head section 1 includes a guide shaft 4 fixed to a frame (not shown), and a guide shaft 4 fixed to a frame (not shown).
The lead screw 2 is arranged parallel to the axial direction (
They are meshed so that they can move in the X-axis direction (Fig. 2).

Furthermore, as is well known, the print head section 1 is selectively rotated by a motor (not shown), and includes a printing solenoid 1b and a printing wheel 1a that drive a printing wheel 1a that moves up and down, a printing hammer 1c, and a printing solenoid 1b that drives a printing hammer 1c.
and the printing medium 5.
(The bong drive mechanism is not shown).

On the other hand, a platen 6 is arranged facing the printing hammer 1c,
Further above, there is a drive shaft 7b rotatably supported by a frame (not shown) and rotationally driven by a step motor or servo motor 7c via gears 7d and 7e.
A print medium feed drive roller 7a fixed to is provided.

A pair of levers 8 c t 8 d are rotatably supported by a frame (not shown) and fixed to a rotating shaft 8 b. A print medium feeding driven roller 8 a is rotatably mounted at a predetermined position on a shaft 8 e supported at the other end. is provided corresponding to the drive roller 7a.

When inserting the print medium, the driven roller 8a
When a control button or the like on a keyboard (not shown) is pressed, the excited solenoid 8f swings the lever 8c>8d counterclockwise against the spring 8g, so the driven roller 8a retreats and is driven. A gap is secured between the roller 7a and the printing medium 5, so that the printing medium 5 can be inserted freely.

Next, when the solenoid 8f is de-energized by pressing another control button while being held in a predetermined state by hand, the driven roller 8a presses the printing medium 5 against the driving roller 7a by the spring 8g. Hold.

In this state, by appropriately controlling the motor 7c, the printing medium 5 is moved up and down (in the X-axis direction in FIG. 2).

In the known sequential printer that prints general characters and codes by controlling dedicated servo motors or step motors 3 and 7c to respectively control the feeding of the printing medium and the feeding of the print head, the printing head section of the type is 1
and the minimum feed pitch of the print medium 5, for example, 1
/60 inch and 1/30 inch.

These can be distantly related by setting the lead pitch of the lead screw 2 and/or the rotation angle of the motor 3, the tooth ratio of the gears 7d and 7e, and/or the rotation angle of the motor 7c to predetermined values. Can be done.

Here, if the horizontal and vertical directions of the print medium are expressed as coordinates on the X and Y axes, respectively, the sequential printer described above has the following dimensions: X = 1/60 x n inches and Y = 1/30 x as shown in Figure 2. It is possible to print the center of type at all intersections of straight lines expressed in n inches (where n is an integer).

Therefore, when printing required uppercase letters on certificates and other special media, it can be realized by so-called pixel-type printing by using the dots "." and appropriately selecting the above-mentioned intersection points.

An example is shown in FIG. 2 10.

At this time, the above-mentioned point "・" can be replaced with general symbols standardized by JIS etc., such as the middle point "・", period "," and one full stop ".

”, etc., there is no need to provide special type for printing uppercase letters.

Further, printing of general characters and symbols can be easily realized as shown in FIG. 2 by appropriately selecting the above-mentioned intersection points by conventional matrix printing.

In this example, the minimum pitch in the X direction and Y direction is 1/60 inch and 1/30 inch, respectively, because the standard printing pitch by conventional printers is 1/10 inch or 1/10 inch in the X direction and Y direction, respectively. 1/12 inch and 1
This is because we focused on 15 inches or 1/6 inch and selected the greatest common divisor of each to be able to realize all of the printing pitches.

Therefore, according to the present invention, by appropriately setting the minimum feed pitch of the printing medium and type head of a sequential printer, and by using both so-called matrix printing and pixel type printing for character printing, it is possible to improve the print head of the conventional type. A sequential printer is provided that allows for the printing of general characters and symbols as well as uppercase letters without any changes to the printed type.

As explained above, the present invention enables printing character types of sequential printers with a limited number of printed characters to be printed without omitting general characters, numbers, or codes generally mounted on the printing head, and in particular to special characters. without adding a special type head.
This increases the value in use from the customer's point of view, and provides excellent economy and versatility from the manufacturer's point of view.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a sequential printer according to the present invention, and FIG. 2 is a diagram showing an example of characters printed by the sequential printer according to the present invention. 1...Print head section, 1a...Type ring, 1b...Print solenoid, 1c...
Printing hammer, 1d... Ribbon, 2...
Lead screw, 3... Step motor or servo motor, 4... Guide shaft, 5... Printing medium,
6... Platen, 7a... Drive roller, 7b... Drive shaft, 7c... Step motor or servo motor, 7 d + 7 e...・
... Gear, 8a ... Driven roller, 8b ...
... Rotating shaft, 8 c + 8 d ... Lever, 8
e...Shaft, 8f...Solenoid, 8g
...Spring, 10...Example of upper case printing, 1
2...Example of printing general characters and symbols.

Claims (1)

[Claims] 1. A type head that is equipped with multiple types of matrix type including small-dot type and that moves on a guide rail at a pitch that is an integral multiple of the first minimum movement unit to print in the row direction of the print medium; and a print medium feeding means for moving the printing medium in the column direction at a pitch that is an integral multiple of the second minimum movement unit, the type head and the printing medium feeding means being moved at a pitch of the first and second minimum movement units. By selectively driving the type head at each time, the small point type is set as one dot on the print medium, and the first and second minimum movement unit pitches are set to the distance between dots in the row direction and the column direction, respectively. A sequential printer is characterized in that it prints pixel-type characters composed of a dot matrix.