JPH022046A - Multipurpose serial printer - Google Patents

Abstract

PURPOSE:To perform the printing of continuous form paper and that of a slip without detaching the continuous form paper by making the printing process of the continuous form paper and that of the slip independent. CONSTITUTION:A carrier 1 is shaken forwardly to arrange a printing head 2 at the operation position to a platen 3 through guide holes 8a, 10. In this case, a rear printing head 4 is held at a position spaced apart from a platen 5. Continuous form paper 13 is sent out by a tractor 12 to be sucked to a feed roller 14 along a lower stage paper feed path 10 and printed by the printing head 2 and the platen 3. The continuous form paper 13 after printing is sent out along a lower stage paper feed path 11. When a slip is printed, the carrier 1 is shaken rearwardly by the rotation of an eccentric cam 6 to arrange the printing heat at the operation position to the platen 5 through a guide hole 9a and the gap for the platen 5 is set to a normal state. The slip mounted on a slip table 15 is sucked by a feed roller 17 along an upper stage paper feed path 8 to be printed by the printing head 4 and the platen 5 and sent out along an upper stage paper feed path 9 by a feed roller 18.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multipurpose serial printer, and more particularly to a multipurpose serial printer that can perform continuous form printing and single form printing.

[Conventional technology]

Conventionally, this type of multi-purpose serial printer prints with the print head while reciprocating a carrier holding the print head in the width direction of the paper, and then transfers the printed continuous form or cut paper through a shared paper conveyance path. It had a mechanism that sent it out to the rear of the print head.

[Problem to be solved by the invention]

The conventional multi-purpose serial printer mentioned above uses the same paper transport path for both continuous form printing and single form printing, so when changing from continuous form printing to single form printing, continuous form printing is There is a drawback that printing on a single sheet cannot be performed unless the sheet is cut with a cutter or the printed sheet is back-feeded and removed from the sheet conveyance path.

The purpose of the present invention is to remove continuous forms without having to remove them.

To provide a multipurpose serial printer capable of printing continuous forms and single forms.

[Means to solve the problem]

In order to achieve the above object, the multi-purpose serial printer according to the present invention includes a carrier that reciprocates in the width direction of the paper and swings around an axis in the width direction, and a carrier that is arranged on both sides of the swing center of the carrier. Two print heads supported and disposed on the carriers in the front and rear, two platens each forming a pair with the two print heads, and each of the prints by selectively swinging the carrier back and forth. means for positioning the head in an operative position relative to each of said platens;
and a separate and independent paper transport path including the platen.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are longitudinal sectional views showing one embodiment of the present invention.

In the figure, two parallel guide shafts 7a.

7b is laid in the width direction of the paper, and the guide shaft 7a.

7b supports the carrier 1 in a reciprocating manner, an eccentric cam 6 is installed on one guide shaft 7b, the eccentric cam 6 is assembled into the carrier 1, and the eccentric rotation of the eccentric cam 6 moves the carrier 1 to the other guide shaft 7a. rock back and forth around the

In addition, two print heads 2 and 4 are arranged in front and behind the swing center (guide shaft 7a) of the carrier 1, and two platens 3 and 4 are paired with the two print heads 2 and 4.
5 will be provided. Furthermore, separate paper transport paths 10, 11 and 8, 9 including the two platens 3, 5 are installed in upper and lower stages. A guide hole 9a for guiding one print head 4 to the paired platen 5 is provided in the upper paper transport path 9, and a cut table 15 is installed on the paper feed side of the upper paper transport path 8. Feed rollers 17 and 18 are installed in the paper transport paths 8 and 9, respectively.

On the other hand, a feed roller 14 is installed in the lower paper conveyance path 10, and a tractor 12 is installed on the paper feeding side thereof,
Furthermore, the upper and lower paper conveyance paths 8. Guide holes 8a and 10a for guiding the print head 2 to the platen 3 are provided in the lO, respectively.

Next, its operation will be explained.

As shown in FIG. 1, the carrier 1 is swung forward to place the print head 2 in an operating position relative to the platen 3 through the guide holes 8a, 10a. In this case, the rear print head 4 is held at a position separated from the platen 5. In this state, the continuous form 13 loaded on the tractor 12 is sent out by the tractor 12, sucked into the feed roller 14 along the lower paper conveyance path 10, and printed by the print head 2 and platen 3. After printing, the continuous form 13 is quickly sent out backward along the lower paper conveyance path 11.

As shown in FIG. 2, when performing single-sheet printing, the carrier 1 is swung backward by the rotation of the eccentric cam 6, and the print head 4 is placed in the operating position relative to the platen 5 through the guide hole 9a. The gap with the platen 5 is set to a normal state. In this case, the print head 2 is held at a position separated from the platen 3.

The cut sheet 16 loaded on the cut sheet table 15 is sucked by the feed roller 17 along the paper conveyance path 8 in the upper stage, and is transferred to the print head 4.
Printing is performed by the platen 5, and the upper paper conveyance path 9
The feed roller 18 sends out the paper backward along the line.

〔Effect of the invention〕

As explained above, in the present invention, the printing processes for continuous forms and single forms are made independent, so when changing from continuous form printing to single form printing, continuous forms are cut or back-fed to be removed. This has the effect of making it possible to print a single sheet without having to do anything.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view when printing a continuous form, and FIG. 2 is a vertical cross-sectional view when printing a single form. 1...Carrier 2, 4...Print head 3.5...Platen 6...Eccentric cam 7a
, 7b...Shaft 8, 9, 10.11
... Paper transport path 12 ... Tractor 13
...Continuous form 14.17.18...Feed roller 15...Cut table 16...Cut sheet

Claims (1)

[Claims] (1) A carrier that reciprocates in the width direction of the paper and swings around an axis in the width direction, and two carriers that are supported by the carrier at the front and back of the carrier, sandwiching the swing center of the carrier. a print head, two platens each pairing with the two print heads, and means for selectively swinging the carrier back and forth to position each print head in an operating position relative to each platen; A multi-purpose serial printer comprising a separate paper transport path including the platen.