JPH0341353B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a guide that is interposed between a platen of a printing machine or the like and a paper ejection roller disposed on the ejection side of the platen. When the platen cover is closed, there is a paper ejection path in automatic mode in which the bottom surface of the platen cover and the upper surface of the guide communicate with the paper ejection roller between the platen cover and the platen cover, which is openable and openable. In this state, the paper ejection path is switched so that the surface of the platen cover and the upper surface of the guide are respectively switched to form a paper ejection path that also serves as a paper insertion section in a manual mode that communicates with the outside of the paper ejection roller on the same plane. Regarding the mechanism.

[Prior Art and Problems to be Solved by the Invention] Conventional switching mechanisms for this type of paper discharge path include, for example, Japanese Utility Model Application Publication No. 56-21538 and Japanese Patent Application Publication No. 58-28395.
This is already known from publications such as No.

In both cases, when in automatic paper feeding mode, the printed paper is guided to the paper ejection tray without closing the manual paper insertion section with a guide, so there is a problem that the ejected paper may enter the manual paper insertion section. In addition, in order to switch the path from automatic paper feeding mode to manual feeding mode, the lower edge of the plate-shaped switching member is brought into contact with the paper path surface on which the paper slides in an intersecting manner. Therefore, a gap is likely to be formed at the contact portion between the passage surface and the lower edge of the switching member, which may cause paper to enter. To prevent this, the lower edge of the switching member is provided with an oblique side that matches the slope of the passage surface. However, due to the formation of the above-mentioned side, the lower edge of the switching member has an acute-angled side surface, and therefore, when manually inserting the switching member, the tip of the finger is placed in close contact with the passage surface. There is a risk of contact, and in order to prevent this risk, the lower edge of the switching member is formed into an arcuate surface. There is a concern that an acute-angled recess is formed, and the leading edge of the ejected paper gets stuck in this recess, causing a paper jam.

SUMMARY OF THE INVENTION Therefore, the present invention is an apparatus in which a manual paper insertion section is provided in a guide constituting a paper ejection path. This eliminates the risk of printed paper entering the manual insertion section, the risk of contact with the switching member at the tip of a finger during manual insertion, and the occurrence of paper jams due to contact with the switching member at the leading edge of the paper. The object of the present invention is to operate a switch means in connection with this, thereby preventing malfunction of the automatic sheet feeding operation mechanism and thereby achieving safe manual sheet feeding.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a structure in which a guide is interposed between a platen and a paper ejection roller disposed on the ejection side of the platen, and Between the platen cover, which is openable and openable, and the platen cover facing the upper part, there is a paper ejection path in automatic paper feed mode in which the lower surface of the platen cover and the upper surface of the guide communicate with the paper ejection roller when the platen cover is closed; When the platen cover is opened, a paper ejection passage switching mechanism is formed, in which the surface of the platen cover and the upper surface of the guide are connected to the outside of the paper ejection roller in the same plane, and the paper ejection passage also serves as a paper insertion section in a manual push mode. In this case, the guide has a fixed guide plate having one end connected to the platen and an open end at the other end, and the middle part of the guide is rotatable via a spring means so that one end overlaps and abuts the lower surface of the open end. The platen cover is attached to the other end of the movable guide plate, and when the platen cover is opened, one end of the movable guide plate moves from the lower surface of the open end of the fixed guide plate to the paper sheet. The movable guide plate is provided with a switch means for stopping the paper feeding mechanism by a separating operation from the lower surface of the open end of the movable guide plate. The gist of this invention is a paper feeding device for a platen of a printing machine, which is characterized by:

[Embodiment] Reference numeral 1 denotes a paper feed stacker, and a pair of upper and lower paper feed rollers 2 are placed above the stacker 1 and press against the stacked papers on the stacker to feed out one sheet of paper. The front side of the stacker 1 is connected to a paper feed path 4 whose one end is connected to the supply side of the platen 3 and the other end thereof.

A guide having the following configuration is provided on the discharge side of the platen 3. That is, this guide includes a fixed guide plate 8 whose one end is positioned in communication with the vicinity of the discharge part of the platen 3 and whose other end has an open end;
a movable guide plate 7 having one end in overlapping contact with the lower surface of the open end and the other end communicating with the paper discharge roller 10;
The movable guide plate 7 is pivotally supported by a shaft 5 at its midpoint, and is biased by a spring 6 to rotate counterclockwise about the shaft 5 as a fulcrum, so that one end of the movable guide plate 7 is biased into overlapping contact with the lower surface of the other open end of the fixed guide plate 8. Further, above the movable guide plate 7 and the fixed guide plate 8, a platen cover 12, which is pivoted by a shaft 11 on the machine frame with its base facing the other end portion of the movable guide plate 7, is provided in common. 12 and the movable guide plate 7, forming a paper ejection path 13 in automatic paper feeding mode that communicates with the paper ejection roller 10, and
A rib 12' is formed at the base of the platen cover 12, and this rib 12' is pressed against the upper surface of the other end of the movable guide plate 7 so as to have a gap 14 for paper passage. A pusher 15 is provided on the plate 7, and this pusher 15 faces a switch 16 attached to the machine frame.
are connected so that the paper feed operation mechanism (motor) that drives the paper feed roller 2 is stopped when the switch is turned off to be described later.

[Function] In the automatic paper feeding mode, the platen cover 12 is covered as shown in FIG. The paper is automatically fed into the platen 3 by the drive of the roller 2, and the printed paper passes through a paper discharge path 13 and a paper passage gap 14 naturally formed between the movable guide plate 7 and the platen cover 12 facing above it. through the paper ejection roller 10
The paper is ejected to the outside.

Next, we will discuss the manual insertion mode.

When the platen cover 12 is opened around its shaft 11, the rib 12' of the platen cover 12 pushes the movable guide plate 7 slightly downward against the spring 6.
After being pushed down, the movable guide plate 7 returns due to the spring force, and the other end contacts the base end of the platen cover 12, which is open as shown in the figure, and through this communication, the gate 9, which has been closed until now, is connected. is opened, and a paper path 17 is formed in which the cover surface and the upper surface of the movable guide plate form the same plane, through which paper can be manually fed to the platen 3 through the opened gate 9.

Further, as the movable guide plate 7 moves to contact the opened platen cover 12, the presser 15 of the movable guide plate 7 is activated by the switch 16.
The automatic paper feeding mechanism is thereby stopped, and the paper feeding roller 2 is stopped.

[Effects of the Invention] As described above, according to the present invention, when the platen cover is in the closed state, the paper ejection path in the automatic paper feeding mode is connected to the paper ejection roller by the lower surface of the platen cover and the upper surface of the movable guide plate, and When the platen cover is open, the surface of the platen cover and the upper surface of the movable guide plate are switched to form a paper ejection path that communicates with the outside of the paper ejection roller on the same plane and also serves as a paper insertion gate in manual insertion mode. Of course, in particular, in the present invention, the guide constituting the paper discharge path is connected to the platen 3 at one end, and has a fixed guide plate having an open end at the other end, and abuts against the lower surface of the open end. Since it is constructed with a biased rotatable movable guide plate, the connecting portion between the fixed guide plate and the movable guide plate does not oppose the movement of the paper when paper is ejected in the automatic paper feeding mode. Since the sheets overlap in a so-called cross-over relationship and completely close the paper insertion section, it is possible to completely prevent paper moving on the guide from entering the insertion section.

On the other hand, in the manual insertion mode, the paper insertion section is formed by separating one end of the movable guide plate from the open end of the fixed guide plate that overlaps with it, so paper insertion can be performed without any problem. Of course, even when discharging printed paper, since the movable guide plate is located on the lower side of the fixed guide plate, it is possible to completely prevent the ejected paper from entering the opened insertion section. Can be done.

Furthermore, since the switch means is operated by the operation of the movable guide plate, the switch operation can be performed faithfully, and malfunction of the automatic paper feed operation mechanism can be prevented and safe manual paper feed can be performed.

As described above, the present invention solves the problems that have occurred in the past, namely, the risk of printed paper entering the manual insertion section in automatic paper feeding mode, and the risk of contact of the fingertip with the switching member during manual insertion. This device has great advantages in that it prevents paper from jamming due to contact with the switching member at the leading edge of the paper, and allows the switching means to be operated by the movement of the movable guide plate.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of the automatic paper feeding mode, and FIG. 2 is a longitudinal sectional front view of the manual paper feeding mode. 3...Platen, 7...Movable guide plate, 8...
Fixed guide plate, 9... Paper insertion section provided in the paper ejection path in manual insertion mode, 10... Paper ejection roller, 12...
...Platen cover, 13... Paper ejection path in automatic paper feeding mode, 16... Switch means, 17... Paper ejection path in manual insertion mode.

Claims (1)

[Claims] 1. A guide is interposed between the platen and a paper ejection roller arranged on the ejection side of the platen, and between this guide and a platen cover that can be opened and closed above the guide, when the platen cover is closed, The paper ejection path in the automatic paper feed mode that connects the above paper ejection roller with the lower surface of the platen cover and the upper surface of the guide, and when the platen cover is open, the surface of the platen cover and the upper surface of the guide are the same outside the above paper ejection roller. In a paper ejecting path switching mechanism in which ejected paper paths that also serve as sheet insertion sections in a manual insertion mode that communicate in a planar manner are selectively formed, the guide has one end communicating with the platen and the other end having an open end. and a movable guide plate whose midway portion is rotatably supported via spring means so that one end overlaps and contacts the lower surface of the open end,
The platen cover is placed on the other end of the movable guide plate so that it can be pressed so that when the platen cover is opened, one end of the movable guide plate is separated from the lower surface of the open end of the fixed guide plate so that paper can be inserted. , and the movable guide plate is provided with a switch means for stopping the paper feeding mechanism by separating the movable guide plate from the lower surface of the open end of the movable guide plate. Paper feed device.