JPH04116041A - Sheet discharging device - Google Patents

Abstract

PURPOSE:To perform smooth discharge by unclamping a sheet press from a clamper and pressing the curl of the forward end of a sheet when the sheet press is held on the upper surface of a clamper and the clamped sheet is discharged to a discharge part through movement of the clamper. CONSTITUTION:A sheet 14 is clamped by a clamper 12 and is pulled out onto a discharge part 15 from a printing part along a guide rail 13 and unclamped to discharge the sheet 14 onto a discharge part 15. The rear end of the sheet 14 is pressed by a U-shaped holding piece 17 and discharged in a direction B. A linear part 19a of a sheet press 19 formed in the shape of a trapezoid is held on the upper surface of a clamper 12. When the sheet is pulled out through movement of the clamper 12, the sheet press 19 is unclamped from the clamper 12 and a trapezoidal side part 19b is slipped down. The sheet press 19 is slipped down around an axis 21 to press the forward end of the sheet 14 and a curl is straightened to smooth discharge. During outbound movement of the clamper 12, the side 19b is lifted by means of the side wall of the clamper 12 as it is slid, and is held in an original state on an upper surface.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is for ejecting the print paper from a device such as a printer that contacts the print paper with a platen and prints with a print head via an ink ribbon. The present invention relates to a paper ejecting device.

[Conventional technology]

FIG. 5 is a schematic perspective view showing a conventional device of this kind disclosed in, for example, Japanese Unexamined Patent Publication No. 1-249477.
Paper transport rollers convey the paper from the discharge section (31), (A) is the discharge section base provided at the bottom of the discharge section (3), (F)
The print paper (2) conveyed onto the ejection unit base (A) is transferred to the ejection port (7) opened in the front frame (6).
This is a discharge plate with an L-shaped cross section that discharges the discharge out of the device through.

Next, the operation of the conventional paper ejection device configured as described above will be explained.

First, the print paper U printed in the printing section is conveyed by the paper conveyance roller (1) in the direction shown by the arrow A in the figure, and as shown in FIG.
2) Next, as shown in Figure 7, by moving the ejection plate (5) in the direction shown by the arrow B in the figure, the print paper ■ placed on the ejection unit base (A) is removed. It slides and is discharged out of the device from the discharge port as shown by arrow C in the figure. After ejecting the print paper (2), remove the ejection plate (c)
As shown by the arrow in the figure, it moves in the opposite direction to that at the time of ejection, returns to the initial position, and stops.

[Problem to be solved by the invention]

Since the conventional paper ejection device is configured as described above, if the print paper (2) is warped when placed on the ejection section G), the extrusion surface of the ejection plate (towards) If the height of the paper and the height of the discharge port are not sufficiently set, it will be difficult to discharge the paper, resulting in the problem that the overall height of the apparatus will increase and the size of the apparatus will increase.

This invention was made to solve the above-mentioned problems, and its purpose is to provide a paper ejection device that can reliably eject paper to the outside of the device without increasing the height of the entire device. do.

[Means to solve the problem]

The paper discharging device according to the present invention includes a discharging mechanism that holds the trailing edge of the print paper and sends it out in the direction of the discharging port to discharge it outside the device, and a paper discharging mechanism that is normally held by the transport mechanism and is released from the holding at the time of discharging. It is equipped with a paper presser that descends and presses the top surface of the leading edge of the print paper near the discharge port.

[For production]

The ejecting mechanism in the paper ejecting device of the present invention holds the trailing edge of the printing paper, and the paper presser presses the leading edge of the printing paper to correct warping of the paper.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A paper ejection device according to an embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a perspective view showing the schematic structure of the paper ejecting device. Place the paper (14) in the printing section (not shown)
The clamper (16) conveys the material from the discharge part (15) to the discharge part base (17) provided at the bottom of the discharge part (15).
) is a discharge mechanism that guides the print paper (14) placed on the discharge base (16) to the discharge port (18) by sliding on the discharge base (16) in the direction of arrow B in the figure. It has a U-shaped cross section and is provided with a holding piece (17a) at its upper end. (19) is a paper presser formed in a trapezoid shape, whose both ends are rotatably supported by bearings (21) on the stay (20), and has a straight part (19a) and a diagonal part (19b).
It is made up of. A guide frame (20) is arranged above the discharge port (18) and has one end bent inside the device.

Next, the operation of the paper ejecting device in one embodiment of the present invention configured as described above will be described. First, the printing paper (14) printed in the printing section is moved in the direction of arrow A along the guide rail (13) by the clamper (12) and conveyed to the discharge section (15). In this state, since the straight portion (19a) of the paper presser (19) is supported by the clamper (12), it comes into contact with the upper surface of the clamper (12) at point Q, as shown by the solid line in FIG. As shown in Figure 2, when the clamper (12) is held at the height of the upper surface of the clamper (12) and further moves in the direction of arrow A, the straight part (19a) of the paper presser (19)
is removed from the upper surface of the clamper (12), and instead, one of the diagonally shaded portions (19b) comes into contact with the clamper (12) at point R as shown by the dashed line in FIG.
9b) begins to descend in the direction of the ejector base (16) as indicated by arrow E.

Subsequently, when the clamper (12) moves further in the direction of arrow A, the clamp of the clamper (12) is released and the print paper (14) falls onto the ejection section base (16). At this time, the paper presser (19) is completely removed from the clamper (12) as shown by the two-dot chain line in FIG. It falls onto the leading edge of the print paper (14) on the base (16) and presses the top surface to correct the warp. On the other hand, the rear end of the print paper (14) is attached to the holding piece (17a) of the ejection mechanism (17).
Therefore, if the ejection mechanism (17) is slid in the direction of arrow B as shown in FIG. is discharged. At this time, a guide frame (20) with one end bent inward is provided above the discharge port (18) and serves as a guide for the leading edge of the paper, so that the discharge operation becomes smoother.

After ejecting the print paper (14), the ejection mechanism (17) slides in the direction of the arrow in the opposite direction to the ejection, returns to the initial position, that is, behind the ejection section, and stops.

Further thereafter, the clamper (12) returns from the discharge section (15) to the printing section in the direction of arrow F, stops, and returns to the initial state. At this time, the clamper (12) and paper presser (19) are
In FIG. 4, the clamper (12
) and the diagonal line part (19b) are in contact with each other, the straight part (19a) starts to rise from above the discharge part (16), and then becomes a solid line, and the straight part (19a) touches the clamper at point Q. (12) is held in contact with the upper surface. Then, the clamper (12) further moves toward the printing section, returns to the state indicated by the broken line, that is, the initial state, and returns to the paper presser (19) at point P.
) continue to hold.

Although the paper presser (19) in the above embodiment is formed into a trapezoidal shape and has both ends rotatably supported, the same effect can be achieved even if it is formed into an L-shape and one end is rotatably supported. be. Further, although the ejection mechanism (17) is formed to have a U-shaped cross section, the same effect can be achieved even if the discharge mechanism (17) is formed to have an inverted cross-sectional shape.

〔Effect of the invention〕

As described above, according to the present invention, there is a discharge mechanism that holds the trailing edge of the print paper and sends it out toward the discharge port to discharge it out of the apparatus, and a paper discharge mechanism that is normally held by the transport mechanism and released from the holding at the time of delivery. To provide a paper ejecting device capable of reliably ejecting paper out of the device without increasing the height of the entire device because it is equipped with a paper presser that descends and presses the upper surface of the leading edge of the print paper near the ejection port. This has the effect of making it possible.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing a schematic configuration of a paper ejecting device in an embodiment of the present invention, and FIGS. 2 and 3 are sectional views showing the paper ejecting state of the paper ejecting device in FIG. 1, respectively. Fig. 4 is a schematic diagram showing the relationship between the clamper and paper presser in different states, Fig. 5 is a perspective view showing the schematic configuration of a conventional paper ejecting device, and Figs. FIG. 3 is a cross-sectional view showing the paper discharging state of the paper discharging device in FIG. In the figure, (12) is a clamper as a transport mechanism, (
14) is a print paper, (15) is a discharge section, (17) is a discharge mechanism, (18) is a discharge port, and (19) is a paper presser.

Claims (1)

[Claims] A transport mechanism that transports the print paper from the printing section to the ejection section, and an ejection mechanism that is provided in the ejection section and holds the trailing edge of the print paper and sends it out in the direction of the ejection port to be ejected from the apparatus. A paper ejecting device comprising: a paper presser held by the transport mechanism, released from the holding and lowered during the delivery to press the upper surface of the leading end of the print paper near the ejection port.