JPH0581513B2 - - Google Patents

Description

[Detailed description of the invention] Technical field The present invention relates to a document processing device for a copying machine.

Conventionally, in the case of a copying machine, the stacked originals on the original platen are sequentially moved to the exposure unit so that the required number of copies can be obtained by dividing the copies of a plurality of originals into sets of originals. There is a type of original circulation type in which the originals are fed into the original tray and stacked again on the original placing table. Here, in order to perform the copying operation for the required number of copies, a partitioning means is required to distinguish between parts of the original.

One such means is disclosed in Japanese Patent Publication No. 56-39467. FIGS. 7 and 8 briefly show the contents. First, the document 31 set on the document table 30 is sequentially moved from the lowest sheet to the contact glass 3 by the feed belt 32.
After being exposed to light by the optical system 34 and being copied, the paper is ejected onto the topmost document tray 30 again via the ejection route 35 (in some cases, the reversal route 36 and the reversal ejection route 37). Paper is stacked. Here, in order to distinguish between the last original and the beginning of the restacked original, use the original partition piece 3.
There are 8. This document partition piece 38 is lightweight and rotatable around a shaft 39, and descends under its own weight as the document is fed, and when it descends from the document table 30 due to no document, the displacement of this document partition piece 38 is detected by a sensor 40. When this is detected and it is determined that a partial copy has been completed, the shaft 39 is driven by a motor (not shown) to return the original partition piece 38 to the uppermost position of the original.

In the case of such a rotating document partitioning piece 38, since it obstructs the conveyance path of the document, it can only be installed at a horizontal position or a rear end position when viewed in the paper traveling direction. As a result, there is a possibility that the edges of the documents to be re-stacked will collide with the document partitioning piece 38, thereby impairing the stackability. Also, in the case of smaller originals, the partitioning function may not be effective.
It is necessary to take measures such as making the side fences of the document table 30 movable. Further, a circular space is required in which the document partitioning piece 38 can rotate. Furthermore,
A dedicated sensor 40 detects when the original partition piece 38 has fallen and there is no original under the original partition piece.
Is required. This is because a document presence detection sensor is generally provided to detect whether there is a document on the document table 30, but in the method shown in FIG. 8, a normal document presence detection sensor cannot distinguish it from a restacked document. be.

Further, as shown in FIG. 9, a substantially V-shaped document partition plate 43 having pins 41 and 42 is provided, and
There is one in which a groove 44 for the pin 41 and a loop groove 45 for the pin 42 are provided. 46 is a lifting shaft that moves up along the groove 47 by a solenoid drive. Further, 48 is a document placement table on which a document 49 is placed. In this method, the document partition plate 43 is in the solid line state when the paper runs out, and when this state is detected by a dedicated sensor, the solenoid is driven, the lifting shaft 46 is raised, and the pin 42 is looped as shown by the solid line arrow. Since it moves up the groove 45, the original partition plate 43 is reset to the uppermost position as shown by the dashed line. Then, in the next copy cycle, as the number of documents decreases, the document partition plate 43 descends under its own weight (the pin 42 descends in the loop groove 45 as indicated by the broken line arrow), and when the paper runs out, it returns to the solid line position and is detected by the sensor. Ru. However, this method has the same drawbacks as the method shown in FIG. 8, and the movement of the document partition plate 43 is complicated and unstable.

Purpose The present invention has been made in view of the above points, and the document partitioning piece has a simple movement and can perform the partitioning function regardless of the size of the document without interfering with paper ejection stacking performance. An object of the present invention is to obtain a document processing device for a copying machine that can eliminate the need for a sensor dedicated to partition pieces.

Configuration An embodiment of the present invention will be described based on FIGS. 1 to 6. First, the outline and operation of the overall configuration will be explained with reference to FIG. A document 2 stacked on a document table 1 is fed by a feeding device 3. This document 2 is conveyed through a conveyance path 6 by turn rollers 4, 5, etc.
is conveyed and sent to the contact glass 7 side.
The contact glass 7 is transported to a predetermined position by a conveyor belt 8 and stopped, and exposed by an exposure device on the copying machine main body 9 to be copied. When the exposure is completed, it is transported again by the transport belt 8,
The sheet is discharged to the document table 1 side by a sheet discharge drive roller 11 via a discharge conveyance path 10 around the turn roller 4 . Here, a reversing transport path 13 is provided on the left side of the ejection transport path 10 via a switching pawl 12 that is switched by driving a solenoid, and when reversal ejection is required, the document 2 is transferred to the reversing transport path 13. After entering the paper, the paper is ejected by the paper ejection driving roller 11 which is sent backward. That is, this reversal process is performed when the original 2 is set with the original surface facing downward. On the other hand, when the document is set with its surface facing upward, after passing through the turn roller 4, it is conveyed from the left onto the contact glass 7 by the solenoid-driven switching pawl 14 (the conveyor belt 8
(in reverse), and the paper is ejected through the ejection conveyance path 10 after copying.

In other words, in the document circulation system of this embodiment, the paper feeding direction (leftward) by the feeding device 3 and the paper ejecting direction (rightward) by the paper ejection drive roller 11 are approximately 180 degrees different, and the paper feeding direction from the document placement table 1 is The paper position Ps and the paper ejection position Po to the document platform 1 are the same as the document platform 1.
It is set on the same side (left side).

In this embodiment, a document partition piece 15 is positioned between the paper feed position Ps and the paper discharge position Po and protrudes toward the document table 1 side along the paper discharge direction (rightward).
It is installed so that it can move forward and backward. The original partition piece 15 is positioned and protrudes above the original placing table 1 at a predetermined distance. Here, the document partitioning piece 15 is moved back and forth using a solenoid 16 as a driving source. First, a triangular grooved cam 17 is provided between the paper feed position Ps and the paper discharge position Po, and the rear end of the original partition piece 15 is fixed to a pin 18 set to move along this groove. Furthermore, an arm 19 for actuation is integrally connected. A link 20 rotatably connected to the other end of the arm 19 is provided to be swingable about a fulcrum 21 . The solenoid 16 and spring 22 are connected to the other end of this link 20, and by swinging the link 20 left and right, the original partition piece 15 is moved forward and backward via the arm 19.

Further, a document presence/absence detection sensor 23 is provided to detect the presence or absence of the document 2 on the document placement table 1. This sensor 23 is a normal optical sensor consisting of a light emitting part 23a and a light receiving part 23b, but it does not detect the re-stacked original 2s on the original partition 15 and the original (uncopied original) 2 below the original partition 15 is detected. The detection area is set to detect only _F.

In such a configuration, the operation will be explained with reference to FIGS. 2 to 6. First, FIG. 2 shows a state in which a plurality of originals 2 are set on the original placing table 1, and the original partitioning piece 15 is also in a state of protruding above the uppermost sheet. When the copying operation is started, the originals _2F are sequentially fed by the feeding device 3 starting from the lowest one. At this time, the paper ejection position
As shown in FIG. 3, the re-stacked original 2s ejected from Po has its leading edge (rear end of ejected paper) at the original partition piece 15.
It will be in a lifted state. Therefore, it is distinguished from the uncopied document _2F , and is not concerned with the detection operation of the document presence/absence detection sensor 23. When the copying operation progresses and the uncopied original _2F is no longer on the original placing table 1, all the originals are re-stacked as the original 2s and the state shown in FIG. 4 is reached. As a result, the document presence/absence detection sensor 23 detects the absence of a document, so that it is determined that all documents in the set have been fed. The solenoid 16 is energized by a control signal from a control circuit based on the document absence detection signal from the document presence detection sensor 23 . Due to this suction operation, the original partition piece 15 is moved through the link 20 and arm 19.
is pulled to the left, so the original partition piece 15 is retracted from the original placing table 1 side. As a result, the re-stacked manuscript 2
As shown in FIG. 5, the leading end side of s also descends to a normal stacked state. Then, when the copying and restacking of the final original is completed, the solenoid 16 is de-energized. As a result, the return force of the spring 22 is applied, and the original partition piece 15 is brought into the protruding state again via the link 20 and the arm 19. Here, pin 1
8 is set so that it enters the diagonal groove from the left end of the horizontal groove of the cam groove 17 when returning (specifically, the pin (cam follower) 18 is given directionality or a reverse prevention member is provided near the left end of the horizontal groove). etc.). That is, pin 18
can move only in the clockwise direction in the cam groove 17.
Therefore, the original partition piece 15 rises diagonally upward along the diagonal groove, and then falls to the lower end of the vertical groove part due to its own weight, and assumes the positioned protruding position. Here, due to the presence of the diagonal groove, during the return operation, the document partition piece 15 can be in an oblique state above the normal position as shown in FIG. Even if there is a situation in which the document is tilted upward, it will definitely be located above this final stack of documents, and the partitioning function will be reliable.

According to this embodiment, first, the document partition piece 15, which needs to protrude toward the document placement table 1 side, protrudes in the same direction as the document ejecting direction, so that the document ejecting operation is performed smoothly. There is no possibility that the leading edge of the document hits the document partition piece 15. In addition, since it is located between the paper feed position Ps and the paper ejection position Po, which are provided on the same side, it is a common part even if the original size is different, so there is no need to take measures such as changing the position. It is possible to perform a partitioning function depending on the document size. This is particularly useful in centrally referenced devices. Furthermore, as shown in FIG. 3, since the document partitioning piece 15 lifts one end of the re-stacked document 2s, the weight of the separating and feeding tip decreases as the paper feeding progresses, so that it is easier to feed the paper. It will be advantageous. Further, the sensor 23 is used to control the paper feeding operation in normal copying operations, but according to this embodiment, the document presence/absence detection sensor 23 is also used, so that when the absence of a document is detected, It is possible to determine whether feeding of all documents in a set has been completed. Therefore, it is possible to eliminate the need for a dedicated sensor that detects the movement of the document partitioning piece 15 and determines the separation. Furthermore, the movement of the document partitioning piece 15 is simple and reliable, and does not take up any wasted space.

In this embodiment, the reciprocating movement of the document partitioning piece 15 is regulated by the triangular grooved cam 17, but in cases where the document does not necessarily float as shown in FIG. The document partition piece 15 may be simply moved forward and backward in the horizontal direction.

Effects As described above, the present invention is provided with a document partition piece on the document feed port side of the document table for separating stacked documents and exposed re-stacked documents, so that the restackability of ejected documents is not impaired. In addition to being free of space, it can also function as a partition for various types of documents.
In addition, the movement of the document divider piece can be simplified and the space occupied can be reduced, and the document divider plate, which holds the re-stacked document after exposure without contacting the stacked document, is placed on the document feed port side. Since the paper feed side of stacked originals is not loaded with the load from the re-stacked originals, the paper feeding operation can be made smoother. It can be separated positionally from the original, and as a result, the delimited portion can be determined by a normal original presence/absence detection sensor that monitors the original before copying, making it possible to eliminate the need for a dedicated sensor.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing one embodiment of the present invention;
Figures 2 to 6 are schematic side views showing main parts extracted and shown in operating order, Figure 7 is a side view showing a conventional example, Figure 8 is a front view thereof, and Figure 9 is a front view showing a different conventional example. It is a diagram. DESCRIPTION OF SYMBOLS 1... Original placing table, 2... Original, 7... Contact glass (exposure part), 15... Original partition piece, 16... Solenoid (drive source), 23... Original presence/absence detection sensor,
Ps...Paper feed position, Po...Paper output position.

Claims (1)

[Claims] 1. In a document processing device of a copying machine of an original circulation type in which originals placed on a document placing table are sequentially fed to an exposure unit and discharged onto the document placing table again, the document feeding unit of the document placing table is a document partitioning piece disposed on the paper opening side for separating the stacked originals and the restacked originals by holding the re-stacked originals after exposure in a non-contact state with the stacked originals; 1. A document processing device for a copying machine, comprising a document presence/absence detection sensor for detecting the presence or absence of stacked documents.