JPH0225633Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention provides a guide between a platen of a printing machine 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 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 section in manual insertion mode. 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 manual paper insertion section is guided to the output tray for printed paper without closing it with a guide, so there is a problem that the output paper may enter the manual 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 the paper to jam.

Therefore, the present invention has been devised in an apparatus in which a manual paper insertion section is provided in a guide that constitutes a paper ejection path, and has been developed to solve the problems that have arisen in the past, namely, when in automatic paper feeding mode. The purpose is to eliminate 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. It is.

[Means for Solving the Problems] The configuration of the present invention for achieving the above object includes a guide interposed between the platen and a paper ejection roller disposed on the ejection side of the platen, and a guide between the guide and the guide. Between the platen cover, which is openable and openable, and the platen cover openable and closable, 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. In the open state, a paper ejection path is formed by switching between the surface of the platen cover and the upper surface of the guide, which communicate with the outside of the paper ejection roller on the same plane and also serve as a paper insertion section in manual insertion mode. In the mechanism, the means for forming the paper discharge path includes a fixed guide plate having one end in communication with the platen and an open end at the other end, and a rotatable guide plate that is biased by overlapping contact with the lower surface of the open end. A platen cover is attached to the other end of the movable guide plate, and by opening the platen cover, one end of the movable guide plate can insert paper from the lower surface of the open end of the fixed guide plate. The gist of the present invention is a switching mechanism for a paper discharge path, which is characterized in that the paper discharge path can be pressed and rotated so as to be separated from each other.

[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.

On the discharge side of the platen 3, a movable guide plate 7 whose midway portion is pivotally supported on the machine frame by a shaft 5 and rotated counterclockwise by a spring 6 about the shaft 5 as a fulcrum.
One rotating end of the movable guide plate 7 is connected to the lower surface of the other open end of the fixed guide plate 8, which has one end connected to the discharge portion of the platen 3, and the open end and the movable guide plate 7. The movable guide plate 7 is urged to come into contact with and come into contact with the rotating end so that an insertion gate 9 for paper is formed during manual insertion by the action described later. A platen cover 12 is provided on the upper part of the movable guide plate 7, the other rotating end of which is connected to the paper discharge roller 10, and the base of which is pivoted by a shaft 11 to the machine frame facing the other end of the movable guide plate 7. A paper ejection path 13 in an automatic paper feed mode is formed between the platen cover 12 and the movable guide plate 7 and 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 feeding mechanism that drives the paper feeding roller 2 is stopped when the switch is turned off, which will 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 1
At 0, 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 down a little against the force of 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.
As a result, the automatic paper feeding mechanism is stopped and the paper feeding roller 2 is stopped.

[Effect of the invention] As described above, according to the 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 a fixed guide plate having one end connected to the platen and an open end at the other end, and a fixed guide plate that abuts the lower surface of the open end. Since the paper is ejected in the automatic paper feeding mode, the connection part between the fixed guide plate and the movable guide plate does not oppose the movement of the paper. Since the sheets overlap and 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, the paper insertion section in manual insertion mode is formed by separating one end of the movable guide plate from the open end of the fixed guide plate that overlaps with it.
Of course, paper can be inserted without any problems, but
In particular, even when the printed paper is ejected, since the movable guide plate is located on the lower surface side of the fixed guide plate, it is possible to completely prevent the ejected paper from entering the opened insertion section.

As described above, the configuration of 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. By making some improvements to the guide, the occurrence of paper jams due to contact with the switching member at the leading edge of the paper can be eliminated, and this has excellent practical effects.

[Brief explanation of the drawing]

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, 17... Paper ejection path in manual insertion mode.

Claims (1)

[Scope of utility model registration request] 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 platen The paper ejection path in automatic paper feed mode connects the above paper ejection roller with the lower surface of the cover and the upper surface of the guide.
In addition, when the platen cover is open, the surface of the platen cover and the upper surface of the guide are connected to the outside of the paper ejection roller on the same plane, and a paper ejection path that also serves as a paper insertion section in manual insertion mode is formed. In the paper path switching mechanism, the paper discharge path forming means includes a fixed guide plate that connects the guide to the platen at one end and has an open end at the other end;
It is composed of a rotatable movable guide plate whose one end is in overlapping contact with the lower surface of the open end and is urged in the direction of separation, and a platen cover is attached to the other end of the movable guide plate, and the platen cover is opened. A switching mechanism for a paper discharge path, characterized in that one end of the movable guide plate is pressed and rotated so as to be separated from the lower surface of the open end of the fixed guide plate so that paper can be inserted by operation.