JPH0570020A - Recording paper discharging and loading device - Google Patents

Abstract

PURPOSE:To prevent the deterioration of the printing quality of a recording paper and to improve the performance of a printing apparatus by providing a subtray with a paper discharge detecting means to detect the completion of the discharge of the recording paper onto a subtray and a subtray controlling means to tilt the subtray by a fixed angle according to the detecting action. CONSTITUTION:A recording paper discharging and loading device is provided with a subtray 3 on which one sheet of discharged recording paper 6 is put, a paper discharge detecting section 7 to detect the completion of the discharge of the recording paper 6 onto the subtray 3, and a subtray controlling section 10 to tilt the subtray 3 by a predetermined optional angle on the detecting action of the paper discharge detecting section 7. After each of the paper 6 is once discharged onto the subtray 3, it is transferred onto a basetray 4 and loaded. Thus, at the time of discharging the paper 6, the previously discharged paper 6 does not remain on the subtray 3, and rubbing between the charts 6 at the time of discharging them does not occur.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacking apparatus for discharged recording papers, and more particularly, to efficiently control the discharging operation of the recording papers to print by overlapping the discharged recording papers printed by an ink jet printer. The present invention relates to a recording paper discharge and stacking device that is suitable for preventing problems.

[0002]

2. Description of the Related Art Conventionally, copying machines, facsimiles, and
In the paper discharge mechanism of the printer, how the discharged recording papers are stacked in an orderly manner, that is, stackability has been emphasized. Prior art relating to such a paper discharge mechanism is described in, for example, JP-A-61-178361 and JP-A-62-68774. That is, the technique disclosed in Japanese Patent Application Laid-Open No. 61-178361 is a technique in which the original tray and the discharge tray are shared, and the cost can be particularly reduced. Also,
In the technique disclosed in Japanese Patent Laid-Open No. 62-68774, by moving the discharging mechanism, the discharging time can be shortened and the discharging operation can be speeded up.

However, in such a conventional technique,
Addressing the problem of print quality deterioration due to rubbing when ejecting recording paper from each other, such as inkjet printers, has not been sufficiently considered. That is, in the inkjet printer,
The ink on the recording paper may be ejected onto the ejection tray before it has dried sufficiently. Therefore, when the recording papers overlap on the paper ejection tray, the ink surface is rubbed and the printing is deteriorated. In order to deal with such a problem with the conventional technology, it is possible to use a sorter or the like to sequentially stack the discharged recording papers on different trays, but this is a large-scale device configuration. , Size and cost issues. When the recording paper is ejected with the print side facing down, the problem of print deterioration due to rubbing does not occur, but in general, the print surface of the recording paper faces up to check the print status. And then discharged.

[0004]

The problem to be solved by the prior art is that in the prior art, the discharged recording paper is scraped by rubbing the printing surface of the recording paper already stacked on the discharge tray. This is a point in which it is not possible to prevent the deterioration of print quality that occurs. An object of the present invention is to solve these problems of the prior art, eliminate rubbing between recording sheets at the time of discharging, prevent deterioration of print quality of recording sheets, and improve performance of printing devices such as facsimiles and printers. It is an object of the present invention to provide a recording paper discharge and stacking device that enables it.

[0005]

In order to achieve the above-mentioned object, a recording paper discharging and stacking apparatus of the present invention is (1) a recording in which printed sheet-shaped recording paper is discharged and stacked on a tray provided. In the paper ejection and stacking device, a sub-tray on which one ejected recording paper is placed, a paper ejection detection unit that detects the completion of ejection of the recording paper onto this sub-tray, and a detection operation of this paper ejection detection unit , And a sub-tray control section for tilting the sub-tray by an arbitrary predetermined angle. (2) In the recording paper discharging and stacking device described in (1) above, the sub-tray is dropped from the sub-tray when the sub-tray is tilted by the sub-tray controller.
It is characterized in that a base tray for sequentially loading the recording papers placed on the sub-tray is provided at the bottom of the sub-tray. Further, (3) in the recording paper discharge and stacking apparatus according to any one of (1) and (2) above, the sub-tray control unit uses the rotational force of the paper discharge rollers to detect the discharge operation of the paper discharge detection unit. , A sub-tray tilting operation and a returning operation.

[0006]

In the present invention, the recording papers are once discharged onto the sub-tray one by one, and after the discharge is completed, they are moved to the base tray and stacked. By this operation, when the recording paper is ejected, the previously ejected recording paper does not remain on the sub-tray, and the rubbing between the recording paper does not occur at the time of ejection. As a result, even if the ink is not completely dry in an inkjet printer,
It is possible to prevent deterioration of print quality.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a side view showing an embodiment of the configuration of the facsimile according to the present invention according to the present invention. The facsimile of this embodiment has a document tray 1 on which a document 5 to be read that has been carried out during a transmission operation is stacked, a document auxiliary table 2 used when setting a large size document 5, and the present invention. Related to the recording paper discharging and stacking device, the sub-tray 3 on which one discharged recording paper 6 is temporarily placed and parked, the base tray 4 on which the recording paper 6 dropped from the sub-tray 3 is stacked, and the recording A paper discharge detection unit 7 that has an optical sensor that detects the passage of the trailing edge of the paper 6 and that detects when the recording paper 6 is completely discharged onto the sub-tray 3, and a paper discharge that discharges the recording paper 6. Utilizing the rotational force of the roller 8 and the paper discharge roller 9 and the paper discharge roller 8,
It is composed of a sub tray control unit 10 for tilting the sub tray 3. The paper discharge roller 8 of this embodiment is reversely rotated based on the detection operation of the paper discharge detector 7. In the facsimile having such a configuration, the original 5 is sent from the right to the left in the drawing and is sent out onto the original tray 1 during the sending operation. Then, during the receiving operation, the recording paper 6 is
The received image information is printed on the plotter (inkjet printer) (not shown) inside the facsimile.
The sheet is discharged onto the sub-tray 3 by the sheet discharge roller 8 and the sheet discharge roller 9. When the recording paper 6 is discharged to the sub-tray 3, the paper discharge detection unit 7 detects the passage of the rear end of the recording paper 6. Based on this detection operation, by a unit not shown,
The paper discharge roller 8 rotates in the reverse direction. The sub-tray controller 10 tilts the sub-tray 3 by the reverse rotation operation of the paper discharge roller 8, and the tilting causes the recording paper 6 on the sub-tray 3 to be tilted.
Fall on the base tray 4. The sub-tray controller 10 returns the sub-tray 3 to its original position by the forward rotation of the paper ejection roller 8 for printing and ejecting the next recording paper 6, so that the next recording paper 6 is placed on the sub-tray 3. Is discharged to. In this way, the recording paper 6 is once discharged onto the sub-tray 3 and then stacked on the base tray 4. Then, since the recording paper 6 discharged earlier does not remain on the sub-tray 3, the recording paper 6 sent out does not scrape the ink of the recording paper discharged first,
Further, since the recording paper 6 falls on the base tray 4 only by its own weight, it is possible to prevent deterioration of the printing quality without rubbing the printing surface of the recording paper 6 previously loaded. .. In this embodiment, the base tray 4 is provided with a portion for holding the leading end portion of the recording paper 6 received by the sub tray 3 (P portion in the drawing). As a result, the short sub-tray 3 can receive the large recording paper 6.

Next, the structure and operation of the recording paper discharging and stacking apparatus of the present invention will be described in more detail. FIG. 2 is a perspective view and a side view showing the first embodiment of the configuration of the recording paper discharge and stacking apparatus of the present invention. This figure particularly shows the mechanism of the sub-tray control unit 10 in FIG. 1, 11 is a cam for tilting the sub-tray 3 using the rotational force of the paper ejection roller 8, 12 is the reverse rotation of the paper ejection roller 8 (clockwise). When the rotational load of the cam 11 exceeds a certain level, the one-way needle clutch 13 that connects the rotational force of the paper ejection roller 8 to the cam 11 during the rotation in the direction) connects the paper ejection roller 8 and the cam 11 together. Torque limiter to be released, 14 is the sub tray 3
And a cam contact portion with which the cam 11 abuts, 15
Is a support shaft that rotatably supports the sub-tray 3. With such a configuration, the sub-tray control unit of the present embodiment tilts the sub-tray 3 by using the rotational force of the paper discharge roller 8. That is, when the recording paper is discharged, the discharge roller 8 rotates counterclockwise, this rotation is the opening (non-operation) direction of the one-way needle clutch 12, and the rotation of the discharge roller 8 is transmitted to the cam 11. However, the cam 11 is stationary. When the discharge roller 8 rotates in the reverse direction after discharging the recording paper, the one-way needle clutch 12 moves in the operating direction, the rotational force of the discharge roller 8 is transmitted to the cam 11, and the cam 11 moves clockwise (arrow in the figure). Rotate in the A direction). The cam contact portion 14 of the sub-tray 3 is pushed up by the tip of the rotating cam 11, and the sub-tray 3 rotates about the support shaft 15 in the direction of arrow B to the position indicated by the broken line in the figure. This stop operation is performed by the sub-tray 3 coming into contact with the exterior surface of the facsimile, so that the torque limiter 1
3 is operated to release the rotational force of the paper discharge roller 8 from the cam 11, which is performed. Although not shown, a spring is used to return the sub-tray 3 to the normal position and hold it. In this way, when the sub-tray 3 is rotationally moved, one recording sheet discharged onto the sub-tray 3 drops onto the base tray 4 in FIG. At this time, since the recording papers fall on the recording papers stacked on the base tray 4, there is no rubbing between the recording papers and the print quality does not deteriorate.

FIG. 3 is a perspective view and a side view showing a second embodiment of the construction of the recording paper discharging and stacking apparatus of the present invention. The recording sheet discharging and stacking apparatus of the present embodiment includes a sheet discharging roller gear 16 that rotates together with the sheet discharging roller 8 via a torque limiter 13 and a sub tray gear 17 that is attached to the sub tray 3 and that rotates while meshing with the sheet discharging roller gear 16. It is configured. When the paper ejection roller 8 ejects the recording paper, the paper ejection roller gear 16 rotates counterclockwise together with the paper ejection roller 8, the sub-tray gear 17 rotates clockwise, and the sub-tray 3 parks the recording paper. Move to the position you want. When the sub-tray 3 comes into contact with the exterior surface, a load exceeding a threshold value is applied to the torque limiter 13, and the torque limiter 13 slides on the contact surface with the paper discharge roller 8 or the paper discharge roller gear 16, and the paper discharge roller gear 16 Stops rotating. As a result, the sub-tray 3 is held at the position where it comes into contact with the exterior surface. After the recording paper is discharged, the paper discharge roller 8 rotates in the reverse direction, and the sub tray 3 rotates counterclockwise via the torque limiter 13, the paper discharge roller gear 16, and the sub tray gear 17. Even during this rotation, due to the action of the torque limiter 13, the rotation of the sub-tray 3 is stopped by contacting the exterior surface. By rotating the sub-tray 3 in the counterclockwise direction, the recording paper discharged onto the sub-tray 3 drops onto the base tray 4 shown in FIG. In this way, it is possible to prevent deterioration of print quality due to rubbing between recording sheets during ejection.

FIG. 4 is a perspective view showing a third embodiment of the construction of the recording paper discharging and stacking apparatus of the present invention. In this example,
The paper discharge roller 8 does not rotate in the reverse direction even after the recording paper is discharged, and the paper discharge roller gear 16 rotates together with the paper discharge roller 8.
A sub-tray gear 17 that rotates while meshing with the paper discharge roller gear 16; It is constituted by a solenoid 19 for controlling the. The operation will be described below. When the recording paper is discharged, the paper discharge roller gear 16 rotates counterclockwise together with the paper discharge roller 8, and the subtray gear 17 rotates clockwise. At this time, the solenoid 19
Is in the ON state, and the solenoid lever 21 is attached to the collar protrusion 20 of the one-way spring clutch 18.
, The one-way spring clutch 18 is closed, and the rotational force of the sub-tray gear 17 is transmitted to the sub-tray 3. Then, the sub-tray 3 rotates upward, and by the action of the torque limiter 13 described above, moves to a position where the recording paper is parked and then stops. When the discharge detection unit shown in FIG. 1 detects the time when the discharge of the recording paper is completed,
The solenoid 19 is turned off, the solenoid lever 21 contacts the collar protrusion 20 of the one-way spring clutch 18, the one-way spring clutch 18 is opened, and the sub-tray gear 17 is opened.
Is no longer transmitted to the sub tray 3. Then, the sub-tray 3 rotates and descends due to its own weight, and comes into contact with the exterior surface and stops by the action of the torque limiter. As the sub-tray 3 descends, the recording paper discharged onto the sub-tray 3 drops onto the base tray 4 shown in FIG. Thus, even in a device in which the paper discharge roller 8 does not rotate in the reverse direction, the raising and lowering operation of the sub-tray 3 can be repeated every time one recording paper is discharged, and rubbing between recording papers at the time of discharge can be avoided. You can

As described above with reference to FIGS. 1 to 4, in the recording paper ejecting apparatus of the present embodiment, the ejected recording papers are once put on the sub-tray, and then the base paper is ejected. Drop them as they are stacked on the tray. As a result, there is no rubbing between recording sheets due to the ejection operation,
For example, it is possible to prevent deterioration of print quality caused by insufficient drying of ink in an inkjet printer.
The present invention is not limited to the embodiment described with reference to FIGS. For example, the recording paper discharge device of the present invention can be applied to a copying machine, a printer, etc., instead of a facsimile. Further, a simple sorter operation can be performed by using the tilting of the sub-tray not for dropping the recording paper to the base tray but for stepwise control of the discharging direction of the recording paper. Further, in the present embodiment, the paper discharge detection unit detects the completion of discharge of the recording paper onto the sub-tray based on the detection of the passage of the trailing edge of the recording paper. That is, if the device has a constant paper conveyance speed, it may be detected at a timing after a predetermined paper feed start time based on the size of the recording paper. In addition, tilting the sub-tray
Corresponding to high-speed paper ejection operation, by making the paper sideways with respect to the progress of the recording paper and dropping the recording paper from the side, and by limiting the tilting distance to an amount sufficient for the recording paper to fall. It is also possible.

[0012]

According to the present invention, it is possible to eliminate the rubbing between recording sheets at the time of discharging, prevent the deterioration of the printing quality of the recording sheets, and improve the performance of printing equipment such as a facsimile and a printer. is there.

[0013]

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a configuration relating to the present invention of a facsimile machine to which the present invention is applied.

FIG. 2 is a perspective view and a side view showing the first embodiment of the configuration of the recording paper discharge and stacking apparatus of the present invention.

3A and 3B are a perspective view and a side view showing a second embodiment of the configuration of the recording paper discharge and stacking apparatus of the present invention.

FIG. 4 is a perspective view showing a third embodiment of the configuration of the recording paper discharge and stacking device of the present invention.

[Explanation of symbols]

 1 Original Tray 2 Original Auxiliary Table 3 Sub Tray 4 Base Tray 5 Original 6 Recording Paper 7 Paper Ejection Detector 8 Paper Ejection Roller 9 Paper Ejection Roller 10 Sub Tray Controller 11 Cam 12 One Way Needle Clutch 13 Torque Limiter 14 Cam Abutment 15 Shaft 16 Paper ejection roller gear 17 Sub tray gear 18 One-way spring clutch 19 Solenoid 20 Collar protrusion 21 Solenoid lever

Claims (3)

[Claims] 1. A recording paper discharge and stacking device for discharging and stacking a printed sheet of recording paper on a tray provided therein, and a sub-tray on which the discharged one recording paper is placed, and the recording paper. Paper discharge detection means for detecting the completion of discharge of the sub tray onto the sub tray, and sub tray control means for tilting the sub tray by an arbitrary predetermined angle based on the detection operation of the paper discharge detection means. A recording paper discharge and stacking device. 2. The recording paper discharging and stacking apparatus according to claim 1, wherein the recording papers placed on the sub-tray that fall from the sub-tray are sequentially stacked as the sub-tray is tilted by the sub-tray control means. A recording paper discharge and stacking device, wherein a base tray is provided below the sub-tray. 3. The recording sheet discharging and stacking device according to claim 1, wherein the sub-tray control unit uses the rotational force of the sheet discharging roller to detect the sheet discharging detecting unit. A recording paper discharging and stacking device, wherein the sub-tray tilting operation and the returning operation are performed based on the above.