JPH0747342B2 - Printing mechanism - Google Patents

Description

The present invention relates to a printing mechanism, and more particularly to a printing mechanism capable of performing continuous form printing and single form printing.

[Prior Art] Conventionally, a printing mechanism capable of performing continuous form printing and single-form printing of this type is a printing head while a holding member holding the printing head is moved from left to right or right to left by a transmission mechanism. The continuous printing form and the single-cutting form are printed through the same conveyance path, and after printing, they are sent to the rear of the print head.

[Problems to be Solved by the Invention] In the above-described conventional printing mechanism, since the same conveyance path is used during continuous form printing and single form printing, when converting continuous form printing to single form printing However, there is a drawback that single-cut printing cannot be performed unless the continuous form is cut or the printed paper is back-fed and removed.

[Means for Solving the Problems] The present invention has been made to solve the above problems. As a means for solving the problems, the printing mechanism of the present invention separately provides a single-cut sheet conveyance path above the continuous document conveyance path. A two-fold print head located above and below the single-sheet transport path in the transport direction is held by a holding member, and the single-sheet slips below the continuous form transport path corresponding to one of the print heads and to the other print head corresponding position. A platen is provided on the lower side of the transport path, and the holding member can be tilted.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a vertical sectional view showing a state of a printing mechanism according to an embodiment of the present invention when printing a continuous form, and FIG. 2 is a vertical sectional view showing a state of printing a single form.

In the figure, 15 is a continuous form conveyance path, and this continuous form conveyance path 15 includes a paper guide 9, a rear paper guide 11 and a feed roller.
The tractor 8 conveys a continuous form.

On the upper side of the continuous form conveying path 15, a single form conveying path 16 is separately provided. The single-cut sheet conveying path 16 includes a paper guide 17, a rear paper guide 18, and feed rollers 13 and 14, and the single-cut sheet table 1
It is designed to convey single-cut sheets from 2.

Two print heads 2 and 4 located in the front and rear of the conveyance direction are held by a holding member 1 above the single-sheet conveyance path 16, and the lower side of the continuous form conveyance path 15 at the position corresponding to one of the print heads 2 and the other. Platens 3 and 5 are provided below the single-surface conveying path 16 at positions corresponding to the print heads 4, respectively.

The holding member 1 is rotatably attached to the front and rear direction of conveyance by a shaft 7 at the lower portion, and the upper portion is supported by an eccentric cam shaft 6, which is tilted by the rotation of the eccentric cam shaft 6 so that the print heads 2 and 4 are inclined. You have a choice.

Next, the operation will be described.

The continuous form set on the tractor 8 is sucked into the feed roller 10 along the paper guide 9 and is printed by the front print head 2 and the front platen 3. The printed continuous form is promptly sent backward along the rear paper guide 11 by the transmission mechanism.

When performing single-cut printing, the front print head 2 moves upward due to the rotation mechanism of the eccentric cam shaft 6 on the upper side, and at the same time, the rear print head 4 moves downward and the rear print head 4 moves.
The gap between the rear platen 5 and the rear platen 5 is in a normal state. Voucher
The single sheet mounted on the sheet 12 is printed by the rear print head 4 and the rear platen 5 sucked by the feed roller 13, and is fed backward by the feed roller 14.

[Effects of the Invention] As described above, in the printing mechanism of the present invention, two print heads are mounted before and after the holding member of the print head, and the continuous form and both conveyance paths are made different, and the print heads are switched and used. As a result, there is an effect that it is possible to print a single form without cutting the continuous form or removing it by back-feeding when converting the continuous form printing to the single form printing.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a state of a printing mechanism according to an embodiment of the present invention when printing a continuous form, and FIG. 2 is a vertical sectional view showing a state of printing a single form. 1: Holding member, 2, 4: Print head 3, 5: Platen, 6: Eccentric cam shaft 7: Shaft, 15: Continuous form conveyance path 16: Single-form conveyance path

Claims (1)

[Claims] 1. A single-cut sheet conveyance path is separately provided above the continuous document conveyance path, and is located above and below the single-cut sheet conveyance path in the conveyance direction.
One print head is held by a holding member, and platens are provided below the continuous form conveyance path corresponding to the one print head and below the single form conveyance path corresponding to the other print head, and the holding member is inclined. A printing mechanism characterized by being made possible.