JPH01320172A - Printing mechanism - Google Patents

Abstract

PURPOSE:To enable a cutform printing without cutting a continuous form or feeding back the same for removal in such a case as a conversion from continuous form printing to cutform printing by loading two printing heads across a printing holding member, feeding continuous forms and cutforms through different paths, and changing over the printing heads for use. CONSTITUTION:A continuous form loaded on a tractor 8 is sucked by a feed roller 10 along a paper guide 9 and subjected to printing by a front printing head 2 and a front platen 3. The printed continuous form is rapidly delivered backwards along a rear paper guide 11 by a transmission mechanism. In the printing on cutforms, the front printing head 2 is shifted upwards and, simultaneously, a rear printing head 4 is shifted downwards by a rotation mechanism of an upper eccentric cam shaft 6, whereby a gap between the rear printing head 4 and a rear platen 5 is made a normal state. The cutform loaded on a cutform mount 12 is sucked by a feed roller 13 and subjected to printing by the rear printing head 4 and the rear platen 5, thereafter being delivered backwards by a feed roller 14.

Description

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

[Prior Art] Conventionally, in a printing mechanism capable of performing continuous form printing and single-sheet printing of this type, a holding member that holds the print head moves from left to right or right to left using a transmission mechanism while moving the print head. Printing was performed on continuous form and single form sheets through the same conveyance path, and after printing, the mechanism was such that they were sent out to the rear of the print head.

[Problems to be Solved by the Invention] In the conventional printing mechanism described above, the same conveyance path is used for continuous form printing and single form printing, so when converting from continuous form printing to single form printing, Ha, iJ! There was a drawback that single-sheet printing could not be performed unless the continuous form was cut or the printing paper was back-feeded and removed.

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and as a means for solving the problems, the printing mechanism of the present invention includes a separate form conveyance path provided above the continuous form conveyance path. , the two print heads located above the one form conveyance path in the front and rear in the conveyance direction are held by a holding member, and the two print heads located below the continuous form conveyance path at the position corresponding to one print head and the single print head at the position corresponding to the other print head are held by the holding member. A platen is provided on the lower side of the ticket conveyance path, and the holding member is configured to be tiltable.

[Example] Next, embodiments of the present invention will be described with reference to the drawings.

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

15 in the figure is a continuous form conveyance path, and this continuous form conveyance path 15
consists of a paper guide 9, a rear paper guide 11, and a feed roller 10, and is adapted to convey continuous forms from the tractor 8.

A separate sheet conveyance path 16 is provided above the continuous form conveyance path 15. The cut conveyance path 16 includes a paper guide 17,
It consists of a rear paper guide 18 and feed rollers 13 and 14, and is adapted to convey the cut sheets from the cut table 12.

Above this ticket conveyance path 16, two print heads 2 and 4 located at the front and back in the conveyance direction are held by the holding member 1, and one print head is placed on the lower side of the continuous document conveyance path 15 and the other is a rad 2 corresponding to the sound. A platen 3.5 is provided below the cut conveyance path 16 at a position corresponding to the other printing pad 4.

The holding member 1 is attached at its lower part to be rotatable in the forward and backward direction of conveyance by a shaft 7, and its upper part is supported by an eccentric camshaft 6, and the print head 2.4 is tilted by rotation of the eccentric camshaft 6. You can choose.

Next, its operation will be explained.

The continuous form attached to the tractor 8 is sucked into the feed roller 1O along the paper guide 9, and printed on the front side by the rad 2 and front platen 3. The continuous form that has been printed is quickly sent rearward along the rear paper guide 11 by the transmission mechanism.

When performing single sheet printing, the rotation mechanism of the upper eccentric camshaft 6 moves the rad 2 upward to the front printing and at the same time moves the rad 4 downward to the rear printing.
The gap between the rear platen 5 and the rear platen 5 becomes normal. The cut sheet mounted on the cut table 12 is sucked in by the feed roller 13, printed on the rear side by the rad 4 and rear platen 5, and sent out rearward by the foot roller 14.

[Effects of the Invention] As explained above, the printing mechanism of the present invention has two print heads attached to the front and rear of the print head holding member, and the continuous forms and both transport paths are different, so that the print heads can be switched and used. This has the effect that single-sheet printing can be performed without cutting or backfeeding continuous forms to remove them when converting from continuous form printing to single-sheet printing.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing a printing mechanism according to an embodiment of the present invention when printing continuous forms, and FIG. 2 is a vertical cross-sectional view showing the printing mechanism when printing single sheets. 1: Holding member? , 4: Print head 3.5 nib platen 6: Eccentric camshaft 7: Shaft
15: Continuous form transport path 16: Single form transport path

Claims (1)

[Claims] A separate form conveyance path is separately provided above the continuous form conveyance path, and two print heads located above the continuous form conveyance path in the front and back of the conveyance direction are held by a holding member, and the continuous form at the position corresponding to one of the print heads is held by a holding member. A printing mechanism characterized in that platens are provided on the lower side of the conveyance path and on the lower side of the cut sheet conveyance path at a position corresponding to the other print head, and the holding member is made tiltable.