JPS63295369A - Image forming device - Google Patents

Abstract

PURPOSE:To make it possible to sort sheets by making a movable rotary body abut against a conveyer rotary body with the use of a drive means so as to clamp only one side of a sheet when the first or final one of a series of sheets is discharged. CONSTITUTION:When a sheet S' on which the final one of a bundle of originals has been copied is discharged, a control circuit turns off a solenoid 21 so that an arm 19 is rotated in the direction B by means of a spring so as to allow dog-up roller 20 to make press-contact with a conveyer roller 16. Accordingly, the sheet S' discharged from a pair of discharge rollers 5 is clamped between and conveyed by the conveying roller 16 and the dog-up roller 20 at the left side thereof as viewed in the conveying direction, and is therefore discharged onto a paper discharge tray 7 at a position C which is different from the position where sheets S are aligned and stacked previously. Subsequently, stacking is made similarly for the second bundle of originals. Thus, it is possible to sort sheets with the use of a simple device.

Description

Detailed Description of the Invention (a) Industrial Application Denominator The present invention relates to an image forming apparatus such as a copying machine or a printing machine, and more specifically, the present invention relates to an image forming apparatus such as a copying machine or a printing machine. The present invention relates to an image forming apparatus that discharges images.

(b) Prior Art Conventionally, various devices have been put into practical use as devices for sorting paper I discharged from image forming apparatuses.

Examples include a sorter (collator) equipped with a large number of bins for sorting and storing sheets, and a stacker that rotates a tray when loading the first or last sheet of a sheet bundle.

←→ Problems to be Solved by the Invention By the way, the above-mentioned sorter (collator) has the drawback of being large and requiring a large installation area. In addition, since the above-mentioned stacker rotates with sheets loaded, the weight increases due to the accumulated sheets, and a large driving force is required to rotate the tray, and the structure is complicated to rotate the tray. It had become.

(5) Means for Solving the Problems The present invention aims to solve the above-mentioned problems, and includes a conveying rotary body that is located on one side of the discharge port and rotates in conjunction with the discharge rotary body. , a movable rotating body that comes into contact with the conveying rotating body, and a driving means for moving the moving rotating body, and the first or second sheet of a series of sheets discharged from the discharge port. When discharging the last sheet, the moving rotary body is moved to a position where it comes into contact with the conveying rotary body by the driving means, and only one side of the sheet is held and conveyed between the conveying rotary body and the transfer body. , the sheet is loaded on a loading table in a posture different from the normal posture.

(E) Effect Based on the above-described configuration, the sheet is discharged from the discharge port to the loading table by the discharge rotating body, and is aligned with the base end side of the loading table by the inclination of the loading table. Then, the last sheet or the first sheet of the next sheet bundle is discharged by the discharge rotary body, and only one side is held between the conveying rotary body and the movable rotary body that has moved to a position where it comes into contact with the conveying rotary body. The objects are transported and loaded onto a loading platform in a different attitude from the normal attitude.

(to) Examples Below, 1. Examples of the present invention will be described.

As shown in FIGS. 3 and 4, the copying machine 1 has a paper discharge port 3 provided in a main body 2, and a pair of discharge rollers 5 are disposed near the paper discharge port 3. As shown in FIGS.

A one-sided transport unit 6 is disposed on one side of the paper discharge port 3, and a paper discharge tray 7 is disposed near the paper discharge r:J3.

Further, as shown in detail in FIGS. 1 and 2, the one-sided transport unit 6 has a unit base 9 fixed to the main body 2, and the pace 9 is attached in the direction of the arrow by a spring (not shown). The arm 10, which is biased by the arm 10, is rotatably supported by the pin 11. A shaft 12.13 is protruded from the arm 10, and a friction roller 15 that rotates in contact with the upper roller 5a of the discharge roller pair 5 is rotatably supported at the tip of the shaft 12. There is. Further, a conveying roller 16 consisting of a large diameter portion 16a and a small diameter portion 16b is rotatably supported at the tip of the shaft 13, and the small diameter portion 16b comes into contact with the friction roller 15, and the conveyance roller 16 is rotatably supported. The driving force is transmitted to 16. Furthermore,
A shaft 17 is provided protruding from the unit base 9, and a bell crank-shaped arm 19 is rotatably supported on the shaft 17. A dock-up four-wheeler 20 is rotatably supported at one end of the arm 19, and a solenoid 21 is connected to the other end. In addition, the arm 1
Reference numeral 9 is connected to a spring (not shown), and is urged to rotate in the direction of arrow B by the spring.

The large-diameter portion 16a of the conveying roller 16 and the dock-up roller 20 have a crown shape to facilitate changing the direction of discharge of the sheet S. (See Figure 5). □ Since this embodiment has a hypothetical configuration, when a plurality of document bundles are to be copied, the image of the first document in the document bundle at the first east exit is read by the document reading unit of the copying machine 1, and the image of the first document in the document bundle at the first east exit is read. An image is formed by the copying section based on the image read by the reading section. Then, copy the image onto sheet S,
The sheet S is then held between a pair of discharge rollers 5 and discharged onto a paper discharge tray 7. At this time, solenoid 21 is turned on.
The dock-up roller 20 is separated from the conveyance roller 16 and has no conveyance force (see FIG. 1).

Furthermore, due to the inclination of the tray 7, the sheets S discharged onto the paper discharge tray 7 are brought into contact with the main body 2 at the base end of the tray 7, and aligned and stacked. Similarly, the originals are sequentially copied onto sheets S, and the sheets S are aligned and stacked on the paper discharge tray 7. When the sheet S' on which the last original of the first original bundle has been copied is ejected, a sensor (not shown) that detects the sheet S' sends a signal to a counter (not shown) that counts the number of sheets. Solenoid 21
turns off. As a result, the arm 19 is rotated by the spring in the direction of arrow B, and the dock-up roller 20 is pressed into contact with the conveyance roller 16. Then, the sheet S' is discharged from the discharge port 3 onto the paper discharge tray 7 by the discharge roller pair 5. At this time, the sheet S' is held and conveyed on the left side in the conveyance direction by the conveyance roller 16 and the dock-up roller 20, and is discharged to position C (see FIG. 3). Then, by the same operation as described above, the document bundle S... of the second east exit is accumulated on the paper output tray 7, and the last sheet S' of the second east exit is also stacked on the paper output tray 7 by the same operation as described above. (See Figure 6).

Further, as another embodiment, a case will be described in which the copying machine 1 is provided with a circulation type automatic document feeder 22 on the main body 2, as shown in FIG. The automatic document feeder 22 includes:
As shown in FIG. 8, it is equipped with a sensor 23 that detects the document M, and when the counter 25 counts the detection signal C of the sensor 23 and the count value reaches a predetermined number, that is, the sensor 23 detects the document M. M...'s last manuscript M
When detected, the solenoid 21 is turned off. The document M fed by the feeding device 22 is copied onto a sheet S by the copying machine 1, and the sheet S is further nipped by a pair of ejection rollers 5 and ejected onto the paper ejection tray 7. Then, the sheets S are aligned and stacked on the base end side of the paper discharge tray 7 in the same manner as described above. Then, by the same operation, the original M... is sequentially copied onto the sheet S,
The sheets S... are accumulated on the paper discharge tray 7. Then, when the last document M in the document bundle M is detected by the sensor 23 and the colorant value on the counter 25 reaches a predetermined value, the counter 25 turns off the solenoid 21.

As a result, the sheet S' on which the last document M has been copied is ejected and stacked at position l)C (see FIG. 3) by the same operation as described above. Then, the document bundle M is circulated for the required number of copies, and the sheet bundle S for the required number of copies is accumulated on the paper discharge tray 7 (see FIG. 6).

Furthermore, as another embodiment, a case will be described in which the copying machine 1 is provided with a paper discharge tray 7' having a protrusion 26, as shown in FIGS. 9 and 10. The above-described paper ejection tray 7 is such that the ejected sheet S slides on the tray 7 and
Slanted to align proximally. Therefore, by aligning the sheet S with the reference wall 7a of the paper output tray 7' and aligning the sheet S' discharged at position C with the reference wall 7b, the sheet S' discharged at position C... In addition, the sheet S' can be reliably positioned at the C position.

In addition, in the above-mentioned embodiment, the large diameter portion 1 of the conveyance roller 16
The upper roller 5 of the discharge roller pair 5
Although the conveyance speed of the sheet S in the large diameter portion 16a can be set to be the same as that of the upper roller 5a, the desired effect of the present invention can be achieved. can get.

Further, when the upper roller 5a is connected to the driving means via a one-way clutch, the sheet S' is gradually tilted during the paper ejection operation of the ejection roller pair 5, so that the sheet S' can be more reliably conveyed.
Can be discharged into position.

Further, in the above-described embodiment, the conveying roller 16 is configured to obtain driving force from the friction roller 15, but the present invention is not limited to this, and the conveying roller 16 may be driven by a motor.

Furthermore, in the above-described embodiment, the dock-up roller 20 is moved downward and separated from the transport roller 16 to disable the transport of the sheet S. The sheet SW of the unit 6 is moved to a position outside the paper feeding standard and the sheet SW! transmission may be disabled.

(G) Effects of the Invention As explained above, according to the present invention, when the first or last sheet of a series of sheets to be discharged from the discharge port is discharged, the movable rotary body is moved to the conveyance rotary body by the driving means. Since the structure is configured such that only one side of the sheet is held and conveyed by the conveyance transfer body and the movable rotary body, the first or last sheet is placed on the loading table in a position different from the normal position. The sheets can be loaded and sorted using a simple device, and the installation area can be omitted, the driving force can be reduced, and the sheets can be made more compact.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing a one-sided conveyance unit according to the present invention, and FIG. 2 is a perspective view thereof. FIG. 3 is a plan view showing the sheet discharge state. Further, FIG. 4 is a perspective view showing an image forming apparatus embodying the present invention. Furthermore, FIG. 5 is a side view showing the shapes of the transport rotary body and the moving rotary body. FIG. 6 is a side view showing the stacked state of sheets. Moreover, FIGS. 7 to 10 are diagrams showing other embodiments. DESCRIPTION OF SYMBOLS 1... Image forming apparatus, 3... Discharge port, 5... Discharge rotating body, 7... Loading platform, 16... Transport rotating body, 20... Moving rotating body, 21... Driving means, S ...Sheet S/...First or last sheet.

Claims (1)

[Claims] (1) An image forming apparatus including a discharge rotary body that discharges sheets on which images have been formed from a discharge port, and a loading table that stacks the sheets discharged by the discharge rotary body, located on one side of the discharge port. and a conveyance rotary body that rotates in conjunction with the discharge rotary body, a movable rotary body that comes into contact with and separates from the conveyance rotary body, and a drive means that moves the movable rotary body. When discharging the first or last sheet of a series of sheets discharged from the discharge port, the driving means moves the movable rotary body to a position where it abuts the conveyance rotary body, and the conveyance rotation sandwiching and conveying only one side of the sheet between the body and the moving rotating body,
An image forming apparatus characterized in that the sheet is loaded on the loading table in a posture different from a normal discharge posture.