JPS6261082A - Copying machine - Google Patents

Abstract

PURPOSE:To make a jamming operation of an original unnecessary by providing an original size detecting means, stopping transfer and simultaneously discharging the original during feeding as it is when a detected original size is unsuitable to the size of a transfer paper in light of a transfer magnification. CONSTITUTION:The original size detecting means 61 detects the length and width of the original 2 from the output signal of a size sensor 35 to detect the original size. The original size signal of the original size detecting means 61 is outputted to a decision means 62, which decides whether or not the size of the fed original 2 is suitable to that of the selected transfer paper with the aid of the original size signal, a transfer size signal and a transfer magnification signal. If a decision signal showing that the original 2 is unsuitable to the transfer paper is outputted from the decision means 62, a claw control means 62 controls claws 43-47 so that the original is discharged to a paper discharge stand 48.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a copying machine having a document conveying device.

(Prior art) In a copying machine with a document feeder, originals input automatically or manually are fed one by one to the exposure section by the document feeder.When the documents are fed to the exposure section, the transfer device exposes the original and transfers the image on the original to transfer paper.

After exposure, the document transport device δ discharges the document from the exposure section.

In such conventional copying machines equipped with a document feeder, if the sizes of the document and transfer paper do not match, the copy is made as is, or an abnormality process is performed in which both the transfer device and the document feeder stop their operations. I was doing it. When performing abnormality processing, the transfer device stops starting the transfer operation, and the document conveyance device stops the conveyance motor. However, at this time, since the document is already on the feeding path of the document conveying device, the document remains in the document conveying device. In order to restart the operation again, there is a problem in that it is necessary to perform jam processing to remove the document from within the document conveying device.

〔the purpose〕

The present invention has been made in consideration of the above circumstances, and it is an object of the present invention to provide a copying machine that does not require jamming of the original even when the sizes of the original and the transfer paper do not match.

〔Example〕

The present invention will be explained in detail based on an illustrated embodiment.

FIG. 1 shows a document conveying device of a copying machine according to this embodiment.

This document conveyance device is capable of automatic document conveyance in which documents are automatically taken out and conveyed one by one from a stack of documents, and manual document conveyance in which documents are manually conveyed one by one.

As shown in FIG. 1, original documents 2 are stacked on an automatic feeding table 1. As shown in FIG. The front portion of the document 2 rests on a conveyor belt 5 supported by an auxiliary roller 3 and a drive roller 4, and its tip abuts against a blade 6 disposed diagonally. The lower end of the blade 6 is in contact with the circumferential surface of a separating and conveying roller 7 disposed below the blade 6 under appropriate pressure. A part of the surface of the separating and conveying roller 7 is formed as a flat part in the axial direction, and the blade 6 is in contact with the flat part when the apparatus is not in operation or when the apparatus is started.

The separation conveyance 0-57 and the belt drive row 54 are
(not shown), and both can rotate in synchronization with each other. Further, the separation conveyance roller 7 is connected to a drive motor (not shown) by a belt via a clutch (not shown). When this drive motor rotates and the clutch is ON, the separation conveyance roller 7 and the belt are connected. The driving roller 4 rotates clockwise in FIG. It moves while being squeezed by the blade 6, and as a result, only the lowest one is sent downstream.

The sending distance of the original 2 can be arbitrarily set by the moving length of the circumferential surface of the separation conveyance roller 7, that is, the rotation angle of the separation conveyance roller 7, but in this embodiment, this roller 7 is rotated once.

The lowest document 2 sent out by one rotation of the separation conveyance roller 7 is nipped by the conveyance row 515 placed at the lowered position of the separation conveyance roller 7, and is further conveyed forward. The conveying roller 15 includes a driving conveying roller 16 which rotates as a driving force and a driven conveying roller 5 which rotates in a driven manner.
17.

Auxiliary conveyance rollers 19 and 20 are disposed downstream of the conveyance port 515 along the conveyance path, and each conveys the original in sequence.

Also, a stacker sensor 24 placed near the belt drive row 54, a length sensor 25 placed downstream near the drive conveyance roller 16, a job hinge 26 placed between the auxiliary conveyance rollers 19 and 20, and an auxiliary Conveyance roller 37.
Each sensor of the size sensor 35 located downstream of the copying machine 3B can detect the document passing through the conveyance path 18, and the signals are transmitted to the microcomputer (Fig. (not shown).

A manual document table 23 is provided for manually feeding the document, and the manual document is inserted and fed through the insertion slot 32. The document 2 fed from the manual document table 23 or the automatic feed table 1 hits a barrier 34 installed perpendicularly to the upright conveyance section 33, and the insertion of the document 2 is detected by a sensor 35. Along with
It is held between a pair of friction rollers 37 and 38 that can be moved toward and away from each other by the operation of a solenoid 36,
Retained.

Next, the delayed output from solenoid 36 causes solenoid 3 to
9, the barrier 34 is removed from the conveyance path, and the rollers 38 begin to rotate, starting to convey the document. At this time, various information such as the original size and feeding direction can be read by the size sensor 35, and based on this information, the transfer paper selected by the transfer magnification etc. is fed in synchronization with the transport of the original. Paper is fed from the stand. (Details of the transfer operation will be described later.) After the document is conveyed to the slit exposure section 41 by the conveyance roller 40 and exposed and read, the document is transferred to the curved guide plate 42.
After being circulated through the transport loop formed by the claws 43, 44, 45, 46 and 47 for repeated exposure and repeated copying for a predetermined number of sheets, the transport loop is released and the document is transferred to the paper output tray. The paper is ejected at 48. Winter melon 4 here
3, 44, 45, 46, and 47 are rotatably attached to the main body frame at positions corresponding to the document size. For example, the claw 43 is for an A5T size document, and the claw 43 is for an A4T size document. The claw 44 is used for originals of A3T size, the claw 45 is used for originals of A2T size, and the claw 46 is used for originals of AIT size. The pawls 47 are rotated 1iIJI2II, respectively, and form a conveyance loop with the guide plate 42.

Each loop is provided with 50 to 54 jam sensors. 50° for A5T loop, 51° for A4T
, A3T is provided with 52 sensors, A2T is provided with 53 sensors, and AIT is provided with 54 sensors.

Details of the size sensor 35 are shown in FIGS. 2(a) and 2(b). When the document is fed based on the center, the sensors 35a, 35b, 35c, 35 are symmetrically arranged left and right around the sensor 35d that detects the presence of the document 2, as shown in FIG. 2(a).
e, 35f.

350 is set up. This makes it possible to discriminate between originals 1i2A, 28.20 of various sizes. In addition, when the document is fed based on the edge, as shown in FIG. There is. This makes it possible to distinguish between the originals 112A and 28.20 of various sizes.

The output signal of the size sensor 35 is output to the original skew means 60 and the original size detection means 61.

The document skewing means 60 detects from the output signal of the size sensor 35 whether the edge of the document 2 is being fed parallel to the feeding path. In other words, when the document 2 is being fed based on the center as shown in FIG. 2(a),
The skew of the document 2 is detected based on whether the output signals of the size sensors 35a to 35Q are output symmetrically. If the document 2 being fed is tilted, or if the leading edge of the document 2 is bent or torn, the size sensors 35a to 3
The output signal 5a becomes asymmetrical, and an abnormality in the feeding of the original 2 can be detected. Further, as shown in FIG. 2(b), when the document 2 is fed based on the edge, the tatami size sensor 35h~
An abnormality in the feeding of the original 2 is detected depending on whether the output signal 35 is in a steady state while passing through the original 2.

The document size detection means 61 detects the quality and width of the document 2 from the output signal of the noise sensor υ35, and detects the document size. In the case of the center reference shown in FIG. 2(a), the length of the document 2 is detected by the center size sensor 35d, and the length of the document 2 is detected by the other size sensor 35a.

The width of the document 2 is detected from 35b, 35c, 35e, 35f, and 35g. The document size can be determined from the detected length and width of the document 2. In the case of the edge reference shown in FIG. 2(b), the length of the document 2 is detected by the -starting size sensor 35h, and the other size sensors 35i, 35j
, 35k to detect the width of the document 2. The document size can be determined from the length and width of the original fa2 detected.

The original size signal from the original size detection means 61 is sent to the determination means 6.
2 is output. The determining means 62 determines whether the size of the document 2 being fed matches the size of the selected transfer paper based on the document size signal, transfer paper size signal, and transfer magnification signal.

For example, if the original size is A2, the transfer paper size is A3, and the transfer magnification is 0.71, it is determined that the original and the transfer paper match. For example, if the original size is A3, the transfer paper size is 84, and the transfer magnification is 0.71, it is determined that the original and the transfer paper do not match.

The pawl control means 63 controls the operation of the pawls 43-47. When copying multiple sheets, the curved guide plate 42 and which claws 43 to 47 are
It determines whether a conveyance loop should be formed between the claws and outputs a rotation signal to the claws.

Such an operation of the claw control means 63 occurs when the document feeding is in a normal state, and in an abnormal state, all the claws 43 to 47 do not rotate despite the document size signal, and the document 2
discharge. For example, when a document skew signal is input from the document skew detection means 60, if a skewed document, a folded edge, or a torn document is transferred as it is, it will result in a miscopy. 47 is controlled by υ.

Further, when the determination means 62 outputs a determination signal indicating that the original 2 transfer paper matches, the pawl control means 63 controls the pawls 43 to 47 to discharge the original onto the paper ejection table 48.

Furthermore, when a door open signal indicating that the door of the transfer device is open is input, the pawl control means 63 controls the pawls 43 to 47 so as to discharge the original onto the paper discharging table 48.

The document skew signal from the document skew detection means 60 and the determination signal from the determination means 62 are output to the transfer device, and in the case of an abnormal state, the transfer operation of the transfer unit δ is stopped.

FIG. 3 shows a schematic configuration of the transfer device. Three types of transfer paper are stored in paper feed trays 71a, 71b, and 71C. The reason there are three types is to select the best transfer paper depending on the original size. Paper feed tray 71a.

Paper feed rollers 72a and 72b are used to feed the transfer sheets 71b and 71C one sheet at a time by mm.

72c, m feed cores a73a, 73b, and 73C are provided. The conveyance paths of the paper feed trays 71a, 71b, and 71c merge into one conveyance path, and the sheet is further conveyed by the conveyance rollers 74. Furthermore, a registration sensor 75 and a registration roller 76 are provided on the downstream side of the conveyance path, and the dicing operation of the registration roller 76 is controlled by i, II ml based on the output signal of the registration sensor 75.

On the other hand, when the original 2 reaches the size sensor 35 shown in FIG. 1, the transfer device starts the transfer operation. Original 2 is in exposure section 41
When the light source 77 and the reflection plate 78 reach the surface of the document 2, light is irradiated onto the surface of the document 2. The reflected light from the source [2 is mirror 79a,
The course can be changed by 79b and 79c. Mirror 79a
An optical system 80 is provided between and 79b, and the transfer magnification can be changed.

The light reflected from the original 2 is charged and irradiated onto the photosensitive drum 81, forming an electrostatic latent image. A developing section 82 applies this electrostatic latent image.
The image is developed and transferred to transfer paper at the transfer section 83. The transferred paper is heated and fixed in the fixing section 84, and then transferred to the discharge roller 85a.

It is discharged to the tray 86 by 85b and 85c.

Next, the main operations of the copying machine according to this embodiment will be explained with reference to FIG. First, a document is set and the drive of the document feeder 2 is started (step 1o1). Next, in step 102, the original 2 reaches the size sensor 35d. When the original 2 reaches the size sensor 35d, the original skew detection means 6o detects whether the output signals of the size sensors 35a to 359 are symmetrical (step 103). If it is not symmetrical, the process moves to step 106, the ejection mode.

If they are symmetrical, then the original size detecting means 61 and the determining means 62 determine whether or not the original size matches the transfer paper size (step 1o4).

If they do not match, the process moves to step 106, the discharge mode. If they match, it is then detected whether the door of the transfer device is open or not, and if the door is open, the process moves to step 6, the ejection mode.

In the ejection mode (step 6), the claws 43 to 47 are controlled by the claw control means 63 to eject the original, and all fed originals are ejected.

If it is determined that everything is normal in steps 103, 104, and 105, the transfer device is started (step 107), and the image of the original is transferred to transfer paper (step 108).

According to this embodiment, when an abnormal condition occurs, all the originals are ejected without driving the transfer device.
There is no need for jam processing to take out the original from the original feeder.

〔effect〕

As described above, according to the present invention, even if the sizes of the original and the transfer paper do not match, it is possible to automatically eject the original while being transported.

[Brief Description of the Drawings] Figs. 1 and 2 are structural diagrams of a document conveyance device of a copying machine according to an embodiment of the present invention, Fig. 3 is a structural diagram of a transfer device of the copying machine, and Fig. 4 is a structural diagram of a copying machine of the copying machine according to an embodiment of the present invention. This is a flowchart showing the operation of the copying machine. 1... Own #/JW1 feed table, 2... Original, 3...
... Auxiliary roller, 4... Drive roller, 5... Conveyance belt, 6... Blade, 7... Separation conveyance roller, 1
5... Conveyance row 516... Drive conveyance roller, 17.
... Driven conveyance roller, 19.20 ... Auxiliary conveyance roller, 25 ... Length sensor 26 ... Job sensor, 35
...Size sensor, 36.39...Solenoid, 3
7.3.8... Auxiliary conveyance roller, 40... Conveyance roller, 41... Slit exposure section, 42... Curved guide plate, 43-47... Nail, 48... Paper discharge stand , 49-5
4...Jam sensor, 60...Document skew detection means, 61...Document size detection means, 62...Judgment means, 63...Claw control means, 71a, 71b, 71c.
...Paper feed tray, 72a. 72b, 72G--Paper feed roller, 73a, 73b. Board, 79a, 79b, 79cm...Mirror, 80...
・Optical system, 81... Photosensitive drum, 82... Developing section,
83...Transfer section, 84...Fixing section, 85a, 8
5b. 85G...discharge roller, 86...tray. Applicant's agent Sato -O 35a 35b 35c 35d 35e 35f
35goooooo. (a) 35h 35i 35j 35
koooo. (b) Figure 2 Figure 4

Claims (1)

[Claims] A document transport device that feeds a document to an exposure section and discharges the document from the exposure section after exposure; and a transfer device that exposes the document fed to the exposure section and transfers the image on the document onto transfer paper. a document size detecting means that is provided in the feeding path of the document conveying device and detects the size of the document being fed; determining means for determining whether the size matches the size of the transfer paper in consideration of the transfer magnification in , and if the determining means determines that the size does not match, stopping the transfer by the transfer device, and A copying machine that is characterized by ejecting originals as they are being fed.