JPS63162261A - Printer - Google Patents

Abstract

PURPOSE:To prevent deterioration of printing quality even when paper of thickness varying with place is printed by storing any position in the same line of paper and a gap amount to such a position and controlling an autogap adjustment mechanism. CONSTITUTION:For instance, if the thickness of paper 22 set to a platen 21 varies with place, the positions of points 'D', 'E', 'F' and 'G', and a gap amount of m1 between D-E, a gap amount of m2 between E-F and a gap amount of m3 between F-G are designated. When printing between D-E is completed, a control circuit interrupts printing, during which time, a gap amount of m2 at point 'E' stored in a gap data storage circuit is read. After this, the gap is adjusted to m2, and the positions of points 'E' and 'F' whose data is stored in the gap storage circuit are read to perform printing between E-F. In the same manner, the gap between F-G is adjusted to m3 to perform printing. Thus printing of a single line of the paper 22 is terminated, and a gap at any position in a certain horizontal direction can be designated by a command. Also on the basis of this printing can be performed by changing the gap in the same line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a printer device that is most suitable for printing on sheets of paper having different thicknesses depending on the location, such as envelopes and passbooks.

(Conventional technique) For example, a printer device such as a dot impact printer has a print head mounted on a carriage that moves in the axial direction of the platen, and prints on paper set on the platen while moving the carriage. A printing wire protruding from the head is configured to print by applying impact to the paper via an ink ribbon.

Here, the thickness of the paper set on the platen differs depending on its type and purpose of use, etc. Therefore, in general, printers with the above configuration have different thicknesses between the platen and the printing paper depending on the thickness of the paper. Equipped with an auto gap adjustment mechanism that can automatically adjust the gap between the head and the tip.

In other words, in a printer device equipped with an automatic gap adjustment mechanism, when paper is set on the platen, the shaft supporting the carriage moves perpendicularly to the axial direction of the platen depending on the thickness of the paper. With this configuration, printing is always performed at the optimal gap position according to the thickness of the paper.

By the way, as shown in FIG. 4, sheets of paper 11 having different thicknesses depending on the location, such as envelopes and passbooks, are placed on the platen 12.
, the distance between the paper [1 and the tip of the print head 13 will be different, so the distance between A-8 (the thinner part of the paper) and B-0 in the same line of the paper 11 It will be necessary to change the gap at (the thicker part of the paper).

However, conventional printer devices are configured so that once the gap is adjusted, the gap cannot be changed until printing is finished. In this case, the gap had to be matched to either the thinner or thicker part of the paper, which had the disadvantage that print quality deteriorated in areas where the gap did not match.

(Problems to be Solved by the Invention) As mentioned above, in conventional printer devices, the gear position after gap adjustment is constant, so paper sheets with different paper thicknesses depending on the location, such as envelopes and bankbooks, There was a drawback that print quality deteriorated.

The present invention has been made in view of the above points, and provides a printer vAW that does not cause deterioration in print quality even when printing is performed on paper having different thicknesses depending on the location, such as envelopes and passbooks. The purpose is to

[Structure of the invention] (Means and actions for solving the problem) That is,
The printer device according to the present invention is equipped with an auto-gap [1] mechanism that automatically adjusts the gap between the platen and the leading edge of the print head, and has an auto-gap [1] mechanism that automatically adjusts the gap between the platen and the tip of the print head, and has an auto-gap [1] mechanism that automatically adjusts the gap between the platen and the tip of the print head. The position and the gap layer for this arbitrary position are memorized, and the auto gap adjustment mechanism is controlled based on the memorized arbitrary position and gap amount. With this structure, the paper It is now possible to print with different gaps within the same line, which prevents deterioration in print quality on paper that varies in paper thickness depending on location, such as envelopes and bankbooks.

(Example) Hereinafter, a printer device according to the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the configuration of a printer device according to an embodiment. In the figure, 21 is a platen, and 22 is a sheet of paper set on the platen 21. As shown in FIG.

The platen 21 includes a pair of side frames 23a and 23b.
This side frame 23a,
A shaft 24 is disposed in parallel to the axial direction of the platen 21 at 23b. A carriage 26 carrying a print head 25 is attached to the shaft 24 so as to be slidable along the axial direction of the platen 21 . The print head 25 contains a plurality of print wires, and is configured to form dot characters on the paper 22 by protruding predetermined print wires through an ink ribbon (not shown).

Further, this printer device is configured to include an auto gap adjustment mechanism that automatically adjusts the gap according to the thickness of the paper 22 set on the platen 21. That is, the eccentric cam 21a is attached to the shaft of the side frame 23a123b.

27b is provided, and the shaft 24 can be moved in the front and back direction of the platen 21 (in the directions of arrows X and Y) via eccentric cams 27a and 27b by driving a gap adjustment motor (pulse motor) 28 provided at one end of the shaft 24. It looks like this.

Reference numeral 29 in the figure is a control circuit that controls the entire printer Vt device configured as described above, and a system bus 30 connected to this control circuit 29 is an external interface for exchanging data with a host device (not shown). 31, a print head drive circuit 32 that drives the print head 25, a gap adjustment motor drive circuit 3 that drives the gap adjustment motor 28;
3. a gap specification command interpretation circuit 34 that interprets the gap specification command received by the external interface 31;
A gap storage circuit 35 for storing an arbitrary position in the gap specification command interpreted by the gap specification command interpretation circuit 34 and a gap amount for this arbitrary position is connected to each gap storage circuit 35 .

The operation of the printer device configured as described above will be described below with reference to FIGS. 2 and 3. In other words,
For example, if the thickness of the paper 22 set on the platen 21 differs depending on the location as shown in FIG. 2, a gap designation command is transferred from the host device. This gap designation command is one in which the operator designates an arbitrary position within the same line of the sheet 22 and a gap amount for this arbitrary position. In this case, the positions of points D, E, E, G, and D are specified. GitM7buflim1 between -6 and E-
The gap between F is 1m2, and the gap between F and G! im3
is specified.

This gap specification command is used by external interface 3.
1, the gap specification command interpretation circuit 3
4 interprets the content of this gap designation command, and stores the arbitrary position as a result of this interpretation and the gap amount for this arbitrary position in the gap storage circuit 35.

Next, when the print data is transferred via the external interface 31, the control circuit 29 reads the gap ff1m1 at point D stored in the gap storage circuit 35, and drives the gap adjustment motor via the gap adjustment motor drive circuit 33. 28 to adjust the gap between the platen 21 and the tip of the print head 25 to ml. Subsequently, the control circuit 29 reads the positions of points D and E stored in the gap memory circuit 35, and prints between D and 6 on the paper 22 in the state shown in FIG. 3(a). . .

In this way, when the printing between D-6 is completed, the control circuit 29 interrupts the printing, and during this time the gap memory circuit 35
The gap l1m2 at point E stored in is read out. Then, adjust the gap to m2 in the same manner as above, and then,
The positions of point E and point E stored in the gap memory circuit 35 are read out, and printing between E and F is performed in the state shown in FIG. 3(b). Similarly, the gap between F and G is m3.
The printing is performed by adjusting the position to complete the printing of one line on the paper 22.

In this way, with this printer device, it is possible to specify a gap at an arbitrary position in the horizontal direction by a command, and printing can be performed by changing the gap within the same line based on this specification.

Therefore, the distance between the paper set on the platen and the tip of the print head is always kept constant, making it possible to print on paper with different thicknesses depending on the location, such as envelopes and passbooks. Even in this case, there is no deterioration in print quality.

[Effects of the Invention] As described above, according to the present invention, an arbitrary position within the same line of a sheet designated by an operator and a gap amount for this arbitrary position are stored, and the operation is performed based on the stored arbitrary position and gap amount. By configuring the automatic gap adjustment mechanism to be controlled by the printer, even if printing is performed on sheets of paper having different thicknesses depending on the location, such as envelopes and passbooks, there will be no deterioration in print quality.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a printer IAM according to an embodiment of the present invention, FIG. 2 is a sectional view of the platen in the paper set state in the same embodiment, and FIG. 3 is printing on the paper shown in FIG. 2 above. FIG. 4 is a sectional view of the platen showing the movement of the print head in a conventional printer. 21... Platen, 22... Paper, 25... Print head, 2G... Carriage, 28... Gap adjustment motor, 29... Control circuit, 31... External interface, 32...・Print head drive circuit, 33...
- Gap adjustment motor drive circuit, 34... Gap designation command interpretation circuit, 35... Gap storage circuit. Applicant's agent Patent attorney Takehiko Suzue Figure 2'1b (a) l'3 (b) Figure 3 Figure 4

Claims (1)

[Claims] An automatic gap adjustment mechanism that automatically adjusts the gap between the platen and the tip of the print head, and an arbitrary position within the same line of paper set on the platen, and a gap amount for this arbitrary position. a specifying means for specifying; a storage means for storing the arbitrary position and gap amount specified by the specifying means; and a gap control for controlling the automatic gap adjustment mechanism based on the arbitrary position and gap amount stored by the storage means. 1. A printer device comprising means for printing by changing the gap within the same line of the paper.