JPH0551160A - Sheet discharging device - Google Patents

Abstract

PURPOSE:To heighten reliability on the discharge of sheets and enable cost reduction while reducing the occupied space of a sheet discharging device used for a copying machine, a printer, or the like. CONSTITUTION:This deviel is provided with a means for rotating/fixing a face-up discharge tray 1, formed of a fulcrum 1a formed integrally at the face-up discharge tray 1, a guide 1b, a claw 1c and a stopper spring 13 fixedly provided at a case 11. The face-up discharge tray can be thereby set in an optional position by the fulcrum 1a, and a sheet 12 comes in contact with the upper or lower face of the guide 1b so as to be discharged precisely. The occupied space can be also made small by erecting the face-up discharge tray vertically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet discharging device used in a copying machine, a printer or the like.

[0002]

2. Description of the Related Art In recent years, the market for copying machines, laser printers, etc. has been expanding rapidly. Among them, the demand for small and low-priced products for personal users is remarkable, and they are surpassing each company's development.

A conventional sheet discharging device will be described below. As shown in FIG. 4, 1 is a face-up paper discharge tray attached to the housing 11, 2 is a fixing device for fixing the toner on the paper 12, 3 and 4 are a pair of discharge rollers for conveying the paper 12, 5 and 6 are conveyance guides for the paper 12, 7
Is a discharge port switching plate rotatably attached to the housing 11 at a predetermined angle, 8 is rotatably attached to the shaft 9 serving as a fulcrum at a predetermined angle, and the discharge port is moved in conjunction with the discharge port switching plate 7. The switching levers 10 are face-down sheet ejection trays.

A pin 7a integrally formed with the discharge port switching plate 7 has a long hole 8a formed in the discharge port switching lever 8.
Is fitted to.

The operation of the conventional sheet discharging device constructed as described above will be described below.

When the outlet switching lever 8 is pushed in the direction indicated by the arrow A (the state shown by the solid line in FIG. 4), the shaft 9
Rotate any angle with the fulcrum as the fulcrum. Outlet switching lever 8
The discharge port switching plate 7 rotates at an arbitrary angle around the fulcrum 7b in conjunction with. In this state, the paper 12 that has passed through the fixing device 2 and the discharge roller 3 passes through the upper surface of the discharge opening switching plate 7, passes between the paper delivery guides 5 and 6, and is discharged face down by the discharge roller 4. It is discharged to the tray 11.
Next, when the outlet switching lever 8 is pushed in the direction indicated by the arrow B, the outlet switching plate 7 rotates in the opposite direction to the above by an arbitrary angle (the state shown by the broken line in FIG. 4). In this state, the paper 12 sent by the discharge roller 3 is the discharge port switching plate 7
The sheet comes into contact with the lower part of the sheet and is discharged to the face-up sheet discharge tray 1.

[0007]

However, in the above-mentioned conventional structure, the number of parts is increased, the reliability is lowered and the cost is increased due to the complexity of the structure, and the face-up sheet ejection tray is protruded. However, there is a problem that the installation space of the device becomes large.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and provides a paper ejection device which is highly reliable with respect to paper ejection, can reduce the cost, and can save the space occupied by the device. To aim.

[0009]

In order to achieve this object, the paper discharge device of the present invention comprises a fulcrum integrally formed on a face-up paper discharge tray, guides and pawls, and a stopper spring fixed to the housing. A means for rotating and fixing the face-up paper ejection tray is provided.

[0010]

With this structure, the structure of the paper discharge device is simplified, and the face-up paper discharge tray is held upright.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3 showing an embodiment of the present invention, the same parts as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 1 to 3, the face-up discharge tray 1 is integrally formed with a fulcrum 1a, a guide 1b and a claw 1c. Reference numeral 13 in the figure denotes a stopper spring of the face-up sheet ejection tray 1 fixedly mounted on the housing 11.

The operation of the sheet discharging apparatus of this embodiment having the above-mentioned structure will be described below.

As shown in FIG. 1, the face-up sheet ejection tray 1 is rotatably attached at a fulcrum 1a at an arbitrary angle and is fixed by its own weight. The paper 12 passes through the fixing device 2 and is conveyed by the paper discharge roller 3,
At this time, the paper 12 contacts the lower surface of the guide 1b of the face-up paper ejection tray 1 and is ejected to the face-up paper ejection tray 1 along the guide 1b.

As shown in FIG. 2, when the face-up sheet ejection tray 1 is rotated upward about the fulcrum 1a and is rotated to a vertical position, the claw 1 of the face-up sheet ejection tray 1 is rotated.
c is locked to the stopper spring 8 of the housing 11. In this state, the paper 12 conveyed by the paper discharge rollers 3 contacts the upper surface of the guide 1b, passes between the conveyance guides 5 and 6, and
The paper is discharged to the face-down paper discharge tray 10 by the paper discharge rollers 4.

As described above, according to this embodiment, the fulcrum 1a, the guide 1b and the claw 1c integrally formed on the face-up sheet ejection tray 1 and the stopper spring for the face-up sheet ejection tray 1 fixed to the housing 11 are provided. By providing 13, the number of parts can be significantly reduced as compared with the conventional example, and since the simple configuration allows the paper 12 to be discharged with high reliability, the cost can be reduced.

Further, since the face-up paper ejection tray 1 can be vertically stood and held during face-down paper ejection, which is frequently used, the space occupied by the apparatus can be reduced.

[0019]

As is apparent from the above description of the embodiment, the present invention is a face-up discharge tray composed of a fulcrum integrally formed on the face-up discharge tray, guides and pawls, and a stopper spring fixed to the housing. By providing the means for rotating and fixing the paper tray, it is possible to realize an excellent paper discharge device that has high reliability regarding paper discharge, can reduce the cost, and can reduce the occupied space of the device.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a concept of a paper ejecting apparatus according to an embodiment of the present invention when face up.

FIG. 2 is a schematic side view showing the concept of the same paper ejection device when the face is down.

FIG. 3 is a perspective view of a face-up paper ejection tray of the paper ejection device.

FIG. 4 is a schematic side view showing the concept of a conventional paper ejection device.

[Explanation of symbols]

 1 Face-up output tray 1a Support point 1b Guide 1c Claw 11 Housing 13 Stopper spring

Claims (2)

[Claims] 1. A face-up discharge tray for storing a printing surface of a paper printed by a copying machine or the like, a face-down discharge tray for storing the printing surface of the paper downward, and a pair of discharge rollers. And a conveyance guide, and a means for rotating and fixing the face-up paper discharge tray at an arbitrary angle from a horizontal position to a vertical position. 2. The sheet according to claim 1, wherein the means for rotating and fixing the face-up sheet ejection tray is constituted by a fulcrum integrally formed on the face-up sheet ejection tray, a guide and a claw, and a stopper spring fixed to the housing. Ejection device.