JPH09208106A - Discharged paper sheet tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably discharge a film for an overhead projector or a mother print paper sheet while increasing the discharged paper sheet stacking amount of normal paper sheets onto a discharged paper sheet tray, inexpensively. SOLUTION: A rectangular cutout 21 is formed in the center part of the release end of the bottom surface of a discharged paper sheet tray 11, a drop preventing stopper 14 in which an engaging part 22 is perpendicularly joined to a discharged paper sheet stopping part 23 is formed into an L shape in section. Projecting parts 24 are respectively provided on the end in the width direction of the free end of the engaging part 22. When printing for normal paper sheets is switched to printing for mother print paper sheets, the drop preventing stopper 14 engaged with the cutout 21 of the discharged paper tray 11 is drawn and separated from the paper sheet discharge tray 11, the projecting parts 24 of the drop preventing stopper 14 are fitted to grooves 15 on the bottom surface of the discharged paper sheet tray 11, and the tip of the discharged paper sheet stopping part 23 of the drop preventing stopper 14 is brought in contact with the bottom surface of the discharged paper sheet tray 11 and assembled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge tray of a printing device.

[0002]

2. Description of the Related Art Recently, an electrophotographic method has been used to
It is possible to print on head projector (hereinafter simply referred to as OHP) film and second original drawing paper.
At the same time, there is an increasing demand for an increase in the stack size of plain paper. To increase the stack size of plain paper, the vertical distance between the surface of the paper discharge tray and the paper discharge unit of the printer may be increased.

FIG. 1 is a sectional view showing the overall construction of a general electrophotographic printer. Two paper feed trays 2 are inserted in the printer body 1. The paper 3 fed from one of the paper feed trays 2 is conveyed to the drum-shaped photoconductor 5 at a timing by the registration roller pair 4. The photoconductor 5 is rotationally driven in the clockwise direction, and at that time, the surface is uniformly charged by the charging charger 6, and then the surface of the photoconductor 5 is electrostatically charged by irradiating the laser beam from the laser optical system 7. A latent image is formed.

Next, the electrostatic latent image is visualized by the toner as it passes through the developing device 8, and this visible image is transferred by the transfer charger 9 onto the sheet 3 conveyed to the photoreceptor 5.
The transferred visible image on the sheet 3 is fixed by the fixing device 10. Then, the sheet 3 that has left the fixing device 10 is conveyed to the sheet discharge tray 11 and discharged. The sheets 3 discharged onto the sheet discharge tray 11 are stacked, and the fall prevention stopper 14 improves the consistency of the stacked state.

On the other hand, the photoreceptor 5 after the transfer of the visible image is
The cleaning device 12 removes residual toner and cleans it. Further, the air flow in the printer device is the exhaust fan 13
Is discharged from the printer body 1 by the.

FIG. 2 is a sectional view of the discharge tray 11.
A paper discharge roller 16 is arranged above one end of the paper discharge tray 11, and a fall prevention stopper 14 is provided at the other end of the paper discharge tray 11.
Is closed by. In this discharge tray 11, when the distance between the discharge surface of the discharge tray 11 and the discharge portion of the printing apparatus in the up-down direction is increased, the OHP film and the second original sheet are not stiff and easily curl. Film and the second original drawing sheet are prone to problems such as curling and the like, which prevents stacking.

[0007]

[Problems to be Solved by the Invention] Therefore, 3-5
In the conventional paper ejection tray described in Japanese Patent No. 9959, the paper landing position is moved by the urging means, but the urging means of the paper ejection tray has a complicated mechanism.
There is a problem that the operation is easy to vary and the cost is high.

Therefore, the present invention provides a discharge tray which is capable of stably discharging the OHP film and the second original drawing paper while increasing the discharge stack amount of plain paper, and which is relatively inexpensive. With the goal.

[0009]

According to a first aspect of the present invention, there is provided a paper discharge tray having a paper drop prevention stopper, wherein the paper drop prevention stopper is a paper discharge tray. It is characterized by being an attachment that reduces the amount of paper loaded.

The paper discharge tray according to the second aspect is a paper discharge tray having a paper fall prevention stopper, and when the paper fall prevention stopper is slid in the direction opposite to the paper advancing direction, the paper fall prevention stopper is discharged. It is an attachment that reduces the amount of discharged paper loaded on the paper tray.

The paper discharge tray according to the third aspect is a paper discharge tray having a paper drop prevention stopper, and the paper drop prevention stopper is about 180 ° in the direction opposite to the paper advancing direction.
When rotated and locked, the paper drop prevention stopper serves as an attachment that reduces the amount of discharged paper loaded on the paper discharge tray.

According to a fourth aspect of the present invention, there is provided a paper discharge tray having a paper drop prevention stopper, wherein the paper drop prevention stopper is composed of two or more sheets, and a part of the paper drop prevention stopper is separated. If it is attached later, a part of the paper drop prevention stopper serves as an attachment for reducing the discharged paper stacking amount on the paper discharge tray.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a discharge tray according to the present invention will be described below with reference to the drawings. FIG. 3 is a perspective view showing a first embodiment of the paper discharge tray according to the present invention. The bottom surface or stack surface of the paper discharge tray 11 is deep on the paper discharge roller 16 side and shallow on the open end side.
A rectangular cut 21 is formed at the center of the open end of the bottom surface of the paper discharge tray 11. The fall prevention stopper 14 has an L-shaped cross section in which the engaging portion 22 and the paper discharge stop portion 23 are joined at a right angle. Protrusions 24 are provided at the widthwise ends of the free ends of the engaging portions 22, respectively.

When printing is performed using plain paper, the engaging portion 22 of the drop prevention stopper 14 is detachably and movably fitted into the notch 21, and the open end of the paper discharge tray is provided with the paper discharge stop portion 23 of the drop prevention stopper 14. Close by. When the discharge tray 11 is configured in this way, the leading end of the plain paper discharged by the discharge roller 16 hits the discharge stop portion 23 of the drop prevention stopper 14 and is aligned, and is stacked in order on the bottom surface of the discharge tray 11. .

From printing on plain paper to OHP film and second
When switching to printing of original drawing paper, the configuration of the paper discharge tray 11 is changed as follows. That is, the drop prevention stopper 14 engaged with the notch 21 of the paper discharge tray 11 is pulled out and separated from the paper discharge tray 11. Then, the protrusion 24 of the fall prevention stopper 14 is fitted into the groove 15 on the bottom surface of the paper discharge tray 11 in a posture in which the separated fall prevention stopper 14 is rotated by 180 ° in a vertical plane including the pulling direction, and Paper ejection stop section 2 of the fall prevention stopper 14
The tip of 3 is brought into contact with the bottom surface of the discharge tray 11 to assemble. When the discharge tray 11 is configured in this way, the discharge tray 11 becomes substantially shallower and can slide onto the bottom surface or the stack surface of the discharge tray 11 before the roll of the OHP film or the second original sheet starts. The paper can be discharged smoothly.

FIG. 4 is a perspective view showing a second embodiment of the paper discharge tray according to the present invention. The bottom surface or stack surface of the paper discharge tray 11 is deep on the paper discharge roller 16 side and shallow on the open end side. A rectangular cutout 25 is formed in the center of the bottom surface of the paper discharge tray 11. The fall prevention stopper 26 has an engaging portion 27, a paper discharge stop portion 28, and a second original drawing paper sheet abutting portion 29, which are joined at their ends in a right angle order, and have a Z-shaped cross section. The fall prevention stopper 26 engages with the notch 25 on the bottom surface of the paper discharge tray 11 by the engaging portion 27, and the fall prevention stopper 26
Can be moved in the paper discharge direction along the notch 25.

When printing is performed using plain paper, the fall prevention stopper 26 is located at the open end of the paper discharge tray. If the discharge tray 11 is configured in this way, the discharge roller 1
The leading end of the plain paper discharged by 6 hits the discharge stop portion 28 of the drop prevention stopper 26, is aligned, and is stacked in order on the bottom surface of the discharge tray 11.

From printing on plain paper to OHP film and second
When switching to printing of original drawing paper, the fall prevention stopper 26 is slid and positioned near the paper discharge roller 16. When the discharge tray 11 is configured in this way, the discharge tray 11 becomes substantially shallower, and the OHP film and the second
Before the curling of the original drawing paper or the like starts, the ejected paper hits the second original drawing paper abutting portion 29 of the paper ejection tray 11 and then slides to the bottom surface or the stack surface of the paper ejection tray 11 to smoothly eject the paper. It can be performed.

FIG. 5 is a perspective view showing a third embodiment of the paper discharge tray according to the present invention. The bottom surface or stack surface of the paper discharge tray 11 is deep on the paper discharge roller 16 side and shallow on the open end side. A rectangular notch 30 is formed at the center of the bottom surface of the paper discharge tray 11. The drop-prevention stopper 31 is a central portion 3 for locking the discharge tray 11.
3 and the discharge stop portion 34 have an L-shaped cross section, and a rotation shaft 35 protruding from the end of the central portion 33 is supported on the upper surface of the discharge tray 11 and rotatable about the rotation shaft 35. As

When printing is performed using plain paper, the drop prevention stopper 31 is held at a position rotated around the rotation shaft 35 so that the paper discharge stop portion 34 is lifted upward as shown on the right side of the drawing. When the paper discharge tray 11 is configured in this way, the leading end of the plain paper discharged by the paper discharge roller 16 will be the paper discharge stop portion 3 of the drop prevention stopper 31.
4 and are aligned and stacked on the bottom surface of the discharge tray 11 in order.

From printing on plain paper to OHP film and second
When switching to printing of original drawing paper, the drop prevention stopper 31 is rotated to sink the paper discharge stop portion 34 into the notch 30 as shown on the left side of the drawing. When the discharge tray 11 is configured in this way, the discharge tray 11 becomes substantially shallower, and the discharge stop portion of the central portion 33 of the discharge tray 11 is formed before the curling of the OHP film, the second original sheet, etc. begins. Since the discharged paper hits the portion near the back surface of 34 and then slides on the bottom surface or stack surface of the discharge tray 11,
The paper can be discharged smoothly.

FIG. 6 is a perspective view showing a fourth embodiment of the paper discharge tray according to the present invention. The bottom surface or stack surface of the paper discharge tray 11 is deep on the paper discharge roller 16 side and shallow on the open end side. A rectangular notch 37 is formed in the center of the bottom surface of the paper discharge tray 11.

The fall prevention stopper 38 comprises a fall prevention stopper peripheral portion 39 and an engaging piece 18. Engaging piece 18
The fall prevention stopper 38 assembled by engaging with the fall prevention stopper peripheral portion 39 has an L-shaped cross section in which the engagement portion 40 and the paper discharge stop portion 41 are connected to each other at right angles. A notch 42 is provided from the end side of the paper discharge stop portion 41. The engaging piece 18 has an L-shaped cross section, and is provided with a notch 42 in the fall prevention stopper peripheral portion 39.
Fits in without gaps. The engaging groove 1 is formed on the left and right side surfaces near the tip of the rectangular parallelepiped flat plate forming a part of the engaging portion 40 of the engaging piece 18.
9 are formed. Corresponding to the engaging groove 19 of the engaging piece 18, the notch 42 of the fall prevention stopper peripheral portion 39
Mold claws 20 on the left and right sides near the end of the
Is provided. When the engagement piece 18 is fitted into the notch 42 of the fall prevention stopper peripheral portion 39, the engagement groove 19 of the engagement piece 18 and the mold claw 20 of the fall prevention stopper peripheral portion 39.
Engage with each other and fit without any gap.

The engaging portion 40 of the fall prevention stopper 38
With this, the fall prevention stopper 38 engages with the notch 42 on the bottom surface of the paper ejection tray 11, and the fall prevention stopper 38 can move back and forth in the paper ejection direction along the notch 42.

When printing is performed using plain paper, the drop prevention stopper 38 is positioned near the open end of the paper discharge tray 11. When the discharge tray 11 is configured in this way, the leading ends of the plain paper discharged by the discharge rollers 16 are aligned against the discharge stop portion 41 of the drop prevention stopper 38 and stacked on the bottom surface of the discharge tray 11 in order. To be

From printing on plain paper to OHP film and second
When switching to printing of original drawing paper, the engaging piece 18 is pulled out from the fall prevention stopper 38 and separated. Then, the separated engagement piece 18 is rotated by 180 °, and an end side of the engagement piece 18 corresponding to the tip of the paper discharge stop portion 41 is brought into contact with the bottom surface of the paper discharge tray 11, and the other engagement piece 18 is rotated. The end is set so as to be locked in the locking groove 43 on the bottom surface of the paper discharge tray 11. At the same time, the fall prevention stopper peripheral part 39 is attached to the paper discharge tray 11.
You may move along the notch 42 of the bottom face of this, and may arrange it in an appropriate position. If the discharge tray 11 is configured in this way,
The paper discharge tray 11 becomes substantially shallower, and the paper discharge hits the bottom surface of the engagement piece 18 before the roll of the OHP film or the second original paper starts, and then the bottom surface or the stack surface of the paper discharge tray 11. The paper can be discharged smoothly because it slides in.

[0027]

According to the paper discharge tray of the first aspect, the paper drop prevention stopper serves as an attachment for reducing the discharged paper stacking amount on the paper discharge tray, so that the paper discharge stack amount of plain paper is increased. , Raise the position where the OHP film or the second original paper falls onto the output tray, and slide it smoothly into the stack surface on the output tray before the OHP film or the second original paper begins to curl. There is an effect that the paper can be discharged.

According to the second aspect of the present invention, when the paper drop prevention stopper is slid in the direction opposite to the paper advancing direction, the paper fall prevention stopper reduces the amount of discharged paper loaded on the paper ejection tray. Therefore, while increasing the stack size of plain paper,
Raise the position where the HP film or the second original paper falls onto the output tray, and slide it into the stack surface on the paper output tray before the OHP film or the second original paper begins to curl, and then eject it smoothly. The effect is that you can do paper.

According to the third aspect of the paper discharge tray, the paper fall prevention stopper is moved about 180 degrees in the direction opposite to the paper advancing direction.
When it is rotated and installed, the paper fall prevention stopper serves as an attachment that reduces the stacking amount of discharged paper on the discharge tray, increasing the stacking capacity for plain paper and also for OHP film and second original paper. Is raised to the position where it is dropped onto the discharge tray, and before the roll of the OHP film or the second original sheet begins to slide, it slides into the stack surface on the discharge tray, and it is possible to discharge smoothly. is there.

According to the paper discharge tray of the fourth aspect, the paper drop prevention stopper is composed of two or more sheets, and when the paper drop prevention stopper is partially attached and attached, a part of the paper fall prevention stopper is provided. Is an attachment that reduces the discharged paper stacking amount, so that the discharge stack amount of plain paper is increased, and the OHP film and the second
Raise the position where the original drawing paper, etc. fall onto the output tray, and
Before the curling of the HP film, the second original sheet, and the like starts, there is an effect that the sheet can be slid onto the stack surface on the sheet discharge tray and smoothly discharged.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of a general electrophotographic printer.

FIG. 2 is a cross-sectional view of the paper discharge tray of FIG.

FIG. 3 is a perspective view of a first embodiment of a paper discharge tray according to the present invention.

FIG. 4 is a perspective view of a second embodiment of a paper discharge tray according to the present invention.

FIG. 5 is a perspective view of a third embodiment of a paper discharge tray according to the present invention.

FIG. 6 is a perspective view of a fourth embodiment of a paper discharge tray according to the present invention.

[Explanation of symbols]

 1 Printer Main Body 2 Paper Feed Tray 3 Paper 4 Registration Roller Pair 5 Photosensitive Body 6 Charging Charger 7 Laser Optical System 8 Developer 9 Transfer Charger 10 Fixing Device 11 Paper Ejection Tray 12 Cleaning Device 13 Exhaust Fan 14 Fall Prevention Stopper 15 Groove 16 Ejection Paper roller 17 Rotation support portion 18 Engagement piece 19 Groove 20 Mold claw 21 Notch 22 Engagement portion 23 Paper ejection stop portion 24 Projection portion 25 Notch 26 Drop prevention stopper 27 Engagement portion 28 Paper ejection stop portion 29 Second original paper Equal contact parts 30 Notches 31 Fall prevention stoppers 32 Lower gap closing parts 33 Central part 34 Paper ejection stop parts 35 Rotating shafts 36 Rotation support parts 37 Notches 38 Fall prevention stoppers 39 Fall prevention stopper peripheral parts 40 Engagement parts 41 Discharge parts Paper stop 42 Notch 43 Lock groove

Claims (4)

[Claims] 1. A paper discharge tray having a paper drop prevention stopper, wherein the paper drop prevention stopper serves as an attachment for reducing the amount of discharged paper loaded on the paper discharge tray. 2. A paper discharge tray having a paper fall prevention stopper, wherein when the paper fall prevention stopper is slid in the direction opposite to the paper advancing direction, the paper fall prevention stopper reduces the amount of discharged paper loaded on the paper discharge tray. A paper ejection tray that is an attachment that reduces the number of sheets. 3. A paper discharge tray having a paper fall prevention stopper, wherein the paper fall prevention stopper is rotated by about 180 ° in a direction opposite to the paper advancing direction and locked, whereby the paper fall prevention stopper is provided. A paper discharge tray that serves as an attachment that reduces the amount of paper discharged above. 4. A paper discharge tray having a paper drop prevention stopper, wherein the paper drop prevention stopper is composed of two or more sheets, and when the paper drop prevention stopper is partly attached, the paper drop prevention stopper is provided. A paper ejection tray, wherein a part of the stopper serves as an attachment that reduces the amount of paper ejected on the paper ejection tray.