JPH03166157A - Sheet stacking device - Google Patents

Abstract

PURPOSE:To lead sheets neatly into a sheet receptacle box of a sheet stacking device and thereby facilitate post-handling of sheets by furnishing an aux. sheet feeding device, which introduces into the receptacle box the sheets exhausted while making motion start and motion stop in conformity to a signal given by a sheet sensing device provided in the sheet stacking device. CONSTITUTION:When a sheet exhausted from an image forming device 2 is sensed by a sheet sensing device 33 of a sheet stacking device 1, an aux. sheet feeding device 43 is operated, and the sheet is put on a stack formed in a sheet receptacle box 31 of the sheet stacking device 1. Thus the aux. sheet feeding device 43 is operable without receiving a control signal from the image forming device 2. This permits the sheet stacking device 1 to be connected with image forming device which can occur in different types, to give the sheet stacking device 1 versatility.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a paper that receives recording paper (referred to as output paper) after an image has been formed by an image forming apparatus and temporarily stores this output paper. Concerning loading permits.

(Ex) Conventional technology Conventionally, paper loading devices such as printers that record images on large-sized paper such as A1 or A2 and output (discharge) the images have been simply box-shaped or basket-shaped. Many of them were in the form of , and printed sheets of paper were piled up haphazardly inside them. Therefore, if you try to take out the output paper after a certain amount of output paper has accumulated in the paper stacking device, the output order of the output paper may be out of order or the output paper may not be aligned, resulting in a large amount of work being required for post-processing of the output paper. Sometimes it took time. In order to avoid this phenomenon, a paper stacking device has been proposed that includes an auxiliary device for pulling the paper into the stacking device and aligning the sheets.

(c) Problems to be solved by the invention However, the auxiliary equipment used in the conventional paper stacking device
A is electrically connected to the main body of a printer or the like, and is controlled by the printer main body so as to perform necessary operations in accordance with the timing at which paper is output. However, when the paper stacking device is configured in this way, the stacking device becomes a dedicated device for a main body such as a printer, and it is extremely difficult to provide versatility.

Therefore, the present invention provides a paper stacking device that detects paper ejected from an image forming apparatus and accurately stacks the paper in a paper stacking device without receiving a control signal from an image forming device. The purpose is to provide a device.

(2) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances. For example, referring to FIG. paper receiving box (31
), the paper loading device (1) connected to the image forming device (2) detects the paper (P) discharged from the image forming device (2), and a paper detection device (33) provided in the loading device (1);
The operation is started and stopped in response to the detection signal of this paper detection device (33), and the paper to be discharged is transferred to the paper receiver i (33).
1) an auxiliary paper feeding device (43) introduced into the paper feeder.

(E) Operation - L statement When the paper (P) is ejected from the image forming device I1 (2) or is detected by the paper detection device (33) in the paper stacking device (1), Then, the auxiliary paper feed device (4
3) is operated to load the paper into the paper receiving box (31) in the paper stacking device (1). The above auxiliary paper feed device (43)
operates without receiving a control signal from the image forming device (2), thereby making it possible to connect the paper loading device to various image forming devices, thereby realizing the versatility of the paper loading device (1). cormorant. It should be noted that the above-mentioned numerals in parentheses are shown for reference to the drawings and do not limit the structure of the present invention in any way.

(F) Example A first example of the present invention will be described below with reference to FIGS. 1 to 6.

Fig. 1 shows a vertical side view of the paper loading device of the present invention and the image formatting device to which it is connected. In the figure, numeral 3 is the main body of the paper stacking device 1 of the present invention, and 2 is a laser beam printer (image forming Device)
are shown respectively.

First, the configuration of the laser beam printer 2 will be explained.

A photosensitive tram 5 that rotates in the direction of the arrow is disposed within the laser beam printer 2 . A latent image is formed on the circumferential surface of the photosensitive drum 5 by a laser beam 6 scanned according to image information from a host computer (not shown), etc., and toner is attached to this latent image by a developing device 9. A toner image is formed. Upstream full of photosensitive drum 5
(On the downstream side of the main 1, a large size paper or a roll paper 10 wound into a roll is disposed, and on the downstream side of the roll paper 10, a plurality of pairs of kite rollers 11.12 and a cutter l3 located between them, and furthermore, a registration roller 15 is provided downstream of the guide roller pair 12.

The paper P rewound from the roll paper 10 is cut into a predetermined length by the cutter 13 and conveyed to the registration rollers 15, and is fed to the registration rollers 15 by tying synchronized with the toner image on the registration rollers 15. Ru. The paper P onto which the toner image on the registration roller 15 has been transferred by the transfer Teidenki 16 is conveyed in the direction of the arrow 19 by the conveyor belt 17 wound around a plurality of rollers, and then transferred to the heat fixing roller 2.
After the toner image is fixed by the paper discharge roller pair 21
is discharged to the outside of the laser beam printer 2. The registration roller 15 after the toner image has been transferred is cleaned by a cleaner 22 disposed around the registration roller 15, and then uniformly charged by a charger 23.

Next, the configuration of the paper mounting device of the present invention will be explained.

A paper receiving box 31 having a generally U-shape is provided in the main body 3 of the paper plate loading device 1, and this paper receiving box 31 includes a side plate 31b having a kite portion 31a on the top and a support portion on the top. 3
It consists of a side plate 31d having 1c, a bottom plate 31e, etc., which are integrally constructed. The main body of the laser beam printer 2 and the paper loading device 1 are installed at the upstream end of the guide section 31a.
A contact spring 32 is provided for connecting the two earths.

A paper sensor 33 for detecting the passage of paper P is disposed on the downstream side of the back surface of the contact spring 32, and this paper sensor (paper detection device) 33 is composed of, for example, a known infrared reflective sensor. There is.

A control circuit 36 that is supplied with power from the cord and plaque 35 is disposed inside the paper plate mounting device i1, and the control circuit 36 is connected to the paper sensor 3.
The detection signal detected by the transfer charger 3 is inputted to the transfer charger 16 via the cable 37. Near the continuous part between the L guide part 31a and the side plate 3lb,
Multiple blades 3 made of soft material such as rubber plates on the outside
Auxiliary member (auxiliary paper feed device irY) having 9 to 42 4
3 is provided, and this auxiliary member 43 can be rotated in the direction of arrow 45 and stopped by a drive device (not shown). Reference numeral I) indicates a sheet of paper output into the paper receiving box 31 of the paper plate loading device 1.

Next, the operation of the paper plate loading device 1 will be explained.

As described above, the paper P on which the image has been formed by the laser beam printer 2 is ejected from the paper ejection roller pair 21 to the outside of the machine, or the ejected paper P reaches the paper sensor 33 and is detected. and the control circuit 3 that receives this detection signal.
6, connect the auxiliary member 43 or the arrow 45 with the specified tie.
Start rotating in the direction of. The ejected paper P is guided into the paper receiving box 31 by the blades 39 to 42 around the auxiliary member 43, as shown in FIG. Furthermore, paper P
The tip of the bottom plate 31e is discharged as shown in FIG.
When the rear end of the paper P is turned over by the rotating auxiliary member 43 from the guide part 31a side of the paper receiving box 31 to the support part 31c side, it finally overlaps the paper P1 that has already been output. .

When a large number of sheets P overlap and the surface of the sheets P approaches the auxiliary member 43, the river paper P is always rubbed by the auxiliary member 43 while the auxiliary member 43 is rotating. To prevent this, when the next sheet P is not ejected from the laser beam printer 2, the auxiliary member 43 stops rotating at an appropriate timing under the control of the control circuit 36, and the next sheet P is ejected from the laser beam printer 2.
It will be in a state where it will wait for it to be ejected.

FIG. 4 shows a timing chart showing the output of the paper sensor 33 and the operation of the auxiliary member 43 when the paper on which the I@ image has been formed by the laser beam printer 2 is continuously discharged one after another at equal intervals. Showing a chart. As shown in the figure, the auxiliary member 43 starts operating at 'r 1ffc after the paper P is detected by the paper sensor 33. If the gap between the river paper P is short, the auxiliary member 43 will operate continuously while the paper P is being output.

FIG. 5 shows a timing chart showing the output of the paper sensor 33 and the operation of the auxiliary member 43 when only one sheet of paper P is ejected with an image formed by the laser beam printer 2. , as shown in the figure, after T2 after the trailing edge of the paper P passes the paper sensor 33,
The auxiliary member 43 stops operating.

6th (7I) is a timing chart showing the output of the paper sensor 33 and the operation of the auxiliary member 43 when the paper P on which an image has been formed by the laser beam printer 2 is discharged at various intervals. The interval between P is T2
In the above case, the auxiliary member 43 temporarily stops, and if the interval between the sheets P is T2 or less, the auxiliary member 43 continues to operate without stopping.

FIG. 7 shows another embodiment of the invention.

In this embodiment, the paper sensor 33, which is a sensor for detecting the passage of paper P, is changed from a reflective type to a rehear type. Note that the main body 3 of the paper loading device 1 includes a screw member 5.
The height is adjusted by turning 0.

In the same figure, the paper sensor 51 includes a sensor array 52 whose intermediate portion is supported by a support shaft 52a, and a photointerceptor 53 which has a light emitting element and a light receiving element facing each other and is turned on and off by advancing and retracting the lower end of the sensor lever 52. It consists of When the paper P with the image formed by the laser beam printer 2 is ejected, the sensor printer 5
2 rotates in the direction of the arrow 55, the movement of the other end of the lever 52 is detected by the photointerrupter 53, and a detection signal is output to the control circuit 36. The rotation of the auxiliary member 43 is controlled based on the detection signal of the paper sensor 51 in the same manner as in the previous embodiment.

In each of the above-mentioned embodiments, the auxiliary member 43 includes blades 39 made of rubber or the like that pull the paper P into the paper receiving box 31.
42 is taken as an example, but this auxiliary member 43 is not limited to the above example. For example, in order to align the sheets P, the auxiliary member 43 can reciprocate in a direction substantially perpendicular to the traveling direction of the sheets P. Is it placed with a member that hits the paper P? ! It is also possible to apply these parts in the same way or by combining them.

(g) Effects of the invention As explained above, the paper N! according to the invention! 1 device detects the paper ejected from the main body with a paper sensor (paper detection device) and detects the paper without directly receiving the control 1'J# signal from the main body of the image forming device such as a laser beam printer. The supplementary rib member (auxiliary paper feeding device) operates with accurate timing depending on the state of the paper being ejected, making it possible to properly guide the paper into the paper receiving box of the paper loading device.
When a large amount of paper is output, post-processing of the paper can be made very easy.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a paper loading device and an image forming apparatus connected to this paper loading device, showing one embodiment of the present invention;
3 and 3 are operational diagrams, FIGS. 4 to 6 are timing charts showing the relationship between the signal from the paper sensor and the operation of the auxiliary member, and FIG. 7 is a paper stack showing another embodiment of the present invention. FIG. 2 is a vertical cross-sectional side view of the apparatus and the image forming apparatus. p, p,... river paper 1... paper loading device 2...
Laser beam printer (image forming device), 3
1...Paper receiving box 33.51...Paper sensor (
paper detection device) 36... control circuit 39~
42...Blade made of soft material such as rubber 4
3... Auxiliary member (auxiliary paper feed device)

Claims (1)

[Scope of Claims] 1. A paper stacking device connected to the image forming device and having a paper receiving box in which paper sheets on which images have been formed by the image forming device are stacked, the paper being ejected from the image forming device. a paper detection device provided in the paper stacking device, which detects the
A paper stacking device comprising: an auxiliary paper feed device that starts and stops operating in response to a detection signal from the paper detection device and introduces discharged paper into the paper receiving box.