JP2867714B2 - Paper feeder for cut-sheet media in printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cut-sheet medium feeding / discharging structure in a printer provided with a cut-sheet medium automatic paper feeder.

[0002]

2. Description of the Related Art A conventional technique is disclosed in Japanese Patent Publication No. Sho 63-53091. This is because the cut-sheet medium fed by the cut-sheet automatic sheet feeder 101 arranged behind the platen 105 as shown in FIG.
And conveyed by pressing rollers 106 and 107. Then, printing is performed by the print head 108 on the front surface of the platen 105, discharged upward by the discharge rollers 109 and 110, and stored in the stacker 111. Such a printer is suitable for continuous processing of cut-sheet media, but it is necessary to process only one cut-sheet medium different from the cut-sheet medium stored in the automatic sheet feeder 101. Is complicated. In order to solve this, a paper path 112 for the manual feed processing and the manual feed guide 102 are provided.

[0003]

However, such a conventional cut-sheet medium feeding / discharging structure has a manual-feed guide 102 for cut-sheet medium and a stacker back portion 1 for storing cut-sheet medium after printing.
02 and the same surface, so that if the paper is rolled during conveyance, the leading end 104a of the cut-sheet medium is entangled into the paper path 112 by the rear part of the cut-sheet medium remaining in the paper path. Had problems.

In order to solve the above-mentioned conventional problems, the present invention provides a single-sheet medium feeding / discharging structure for discharging a single-sheet medium which has been wound during conveyance without being caught in a paper path. The purpose is to provide.

Further, in the conventional cut-sheet medium feeding / discharging structure, the discharged cut sheet medium 104 comes into surface contact with the stacker rear portion 102. For this reason, especially when the cut-sheet medium is electrostatically charged in a low-humidity environment, the transport load of the cut-sheet medium 104 is increased. There is a problem in that the sheet is buckled by a couple generated by the transfer force (→ a) of the stacker 110 and the transfer load (→ b) of the stacker rear portion 102, and cannot pass over the paper discharge roller 109.

It is another object of the present invention to provide a cut-sheet medium feeding / discharging structure capable of reliably discharging even a cut-sheet medium having a relatively small thickness.

[0007]

In the printer according to the present invention, a cut-sheet medium feeding / discharging structure includes an automatic feeder disposed vertically.
Common paper feed rows from the paper section and the manual feed guide plate
The cut sheet sent to the print head through the
The paper is discharged onto the paper discharge member located directly above the guide plate.
In the paper feeding and discharging structure of the cut sheet medium in the printer of the formula,
Manual feed guide with the front end facing the paper feed roller
A pair of paper width controls with the top surface serving as the receiving section for cut sheet media on the plate
Arrange the members so that they can be displaced in the paper width direction, and
Right above the guide plate, almost parallel to the manual feed guide plate,
The paper discharge member is arranged with an interval at which the paper width regulating plate can be displaced.
It was done. Also, a rib shape is provided on the front of the paper width regulating plate.
Is arranged .

Further, the guide member is characterized in that it has a rib shape on the front surface.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the cut sheet 14 fed by the automatic sheet feeder 1 includes a platen 5 and paper feed rollers 6 and 7.
Conveyed by Then, after printing is performed by the print head 8 in front of the platen 5, the paper passes through the discharge rollers 9, 10 located above the platen 5, and
Is discharged along the front portion 3a of the stacker bottom member 11
And the front side 3 a of the paper width regulating plate 3.

Next, when processing a cut sheet medium 4 different from the cut sheet medium 14 stored in the automatic sheet feeder 1, the cut sheet medium 4 is placed in front of the automatic sheet feeder 1. Medium
The print digit direction A2 on the front surface 2a of the manual feed guide plate 2
The paper is fed manually by guiding the side edges and the front surface by a paper width regulating plate 3 slidably attached. At this time, by guiding the side edge of the cut sheet medium 4, the cut sheet medium 4 can be fed to a regular position. Next, cut sheet media 4
Is transported by the platen 5 and the paper feed rollers 6 and 7 in the same manner as when the paper is fed from the automatic paper feeder 1. Then, after being printed by the print head 8 at the front of the platen 5, passes through the paper discharge rollers 9, 10 located above the platen 5, the sheet discharge along the front surface 3a of the sheet width regulating plate 3. At this time, even if the cut-sheet medium 4 is curled due to the conveyance by the platen 5, the sheet feed path and the discharge path are separated by the sheet width regulating plate 3, so that the upper end 4a of the discharged cut-sheet medium is separated. Is prevented from being caught in the paper feed path again by the cut sheet medium 4 in the paper feed path, and is smoothly accommodated in the stacker formed by the stacker bottom member 11 and the front surface portion 3a of the paper width regulating plate 3. .

In the embodiment shown in FIG. 3, a rib 12 is provided on the front surface 3a of the paper width regulating plate 3. As a result, after the cut-sheet medium 4 has passed the paper discharge rollers 9 and 10,
Cut media 4 and paper width when transported along paper width regulating plate 3
Static electricity is generated as a result of reducing the transport load with the regulating plate 3
Even in a low-humidity environment where it is easy to perform, stable paper feeding can be performed even when a cut-sheet medium having a relatively thin paper thickness is used.

[0012]

As described above, according to the present invention, the paper feed path for the cut-sheet medium and its discharge are controlled by the sheet width regulating members for guiding the side edges and the front face of the cut- sheet medium. in the path, the results can be separated apart, proof technique entrainment during manual feed of a cut sheet media, even prone humidity static electricity
Stable even when handling thin cut media
Single-sided paper that can be transported
The media can also be held using the same paper width regulating plate,
There is an effect that the paper device can be reduced in size.

Further, by providing the ribs on the front portion of the sheet width regulating plate, as it is conveyed along the sheet width regulating plate
As a result of reducing the transport load between the cut sheet medium and the paper width regulating plate,
Even in a low humidity environment where static electricity is easily generated, there is an effect that even thinner cut sheet media can be reliably discharged.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a cut-sheet medium supply / discharge structure according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of a cut-sheet medium supply / discharge structure according to an embodiment of the present invention.

FIG. 3 is a sectional view of another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a conventional cut-sheet medium feeding / discharging structure.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 automatic paper feeder 2 manual feed guide plate 3 paper width regulating plate 4 cut sheet medium 5 platen 6, 7 paper feed roller 8 print head 9, 10 discharge roller 11 stacker bottom member 12 rib shape

Claims (2)

(57) [Claims] An automatic paper feeder and a manual feed guide disposed vertically.
Print head from each of the plates via a common paper feed roller.
The cut-out paper sent to the
For printers that discharge onto the paper output member located at the top
In the sheet feeding / discharging structure for cut- sheet media in the above, the manual feed is provided with the front end facing the paper feed roller.
A pair of guide plates, the upper surface of which
The paper width regulating member is displaceable in the paper width direction.
Above the manual feed guide plate.
An interval that is approximately parallel to the plate and at which the paper width regulating plate can be displaced
Wherein the paper discharge member is provided and the paper discharge member is disposed . Wherein disposing the ribs to the front portion of the sheet width regulating plate
2. A sheet feeding / discharging structure for a cut sheet medium in the printer according to claim 1.