JPH03158342A - Sheet conveying device - Google Patents

Abstract

PURPOSE:To suppress a useless rejection owing to a defective initial setting of the thickness of sheets or the like to the minimum by composing the system to stop the conveying of sheets when a condition that the detected thickness of sheets is different from the set thickness is continued. CONSTITUTION:By placing copies 1 on a sheet feeding tray 2 and turning on a starting switch, a sheet feeding sensor 3 detects the copies 1, and a sheet feeding roller 4 is rotated to convey the copies. Then, the thickness of the copies 1 is detected by a heavy conveyance detecting roller 5 and compared with a preset value. When it is larger than the present value, the roller 5 decides that it is a heavy conveyance. When the copies are judged to be a heavy conveyance, the number of detections of such a heavy conveyance is counted, and when the number is specified number or more, the conveying means is stopped and an alarm is output.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet conveying device that conveys sheets such as slips.

[Prior art] Conventionally, sheet-like documents such as invoices, which are generated in large quantities, are photographed on microfilm to save space and cost.
It was kept. In addition, index information for searching manuscripts recorded on microfilm was created by reading a bar code attached to a slip using a scanner at the time of photographing, and storing this in memory as index data. FIG. 3 is a diagram showing its configuration.

In the image recording apparatus shown in FIG. 3, when a document with a barcode attached is loaded on the paper feed tray 2 and the start and switch is turned on, the paper feed roller 4 rotates and conveys the document into the inside of the apparatus. Inside the device, there is a barcode reading section and a photographing section. Documents whose barcodes have been read are photographed on microfilm and conveyed to the paper output section 27, and documents whose barcodes have not been read are photographed. Instead, it is transported to the reject tray 22. The read code data is then sent to the host computer 29 and stored in memory together with the address of the document recorded on the microfilm.

FIG. 4 shows the inside of the image recording apparatus. When the document 1 is placed on the paper feed tray 2 and the start switch is pressed, each roller is driven, and the document is first conveyed by the paper feed roller 4. At this time, the separation roller 7 is rotating in the opposite direction to the conveying direction, and serves to feed the sheets one sheet at a time.

Further, the distance between this roller and the paper feed roller 4 can be adjusted depending on the paper thickness.

Next, the document is sent to the double feed detection roller 5.

Here, the roller 5 is movable in the vertical direction,
The thickness of the original is detected by the amount of movement of the roller, and compared with the preset thickness of the original, whether the original is normal or not.
Detects whether sheets are fed one by one or whether they overlap.

12 is a paper sensor 11 is an encoder, and this combination detects the length of the document and detects whether the document is being conveyed normally or abnormally.

The document that has been confirmed to be transported normally is sent below the barcode reading means 18, and the barcode is read.

If the above process has passed successfully, the camera 28
The image is sent to the lower part of the camera, photographed on microfilm, and discharged to the discharge tray 27. On the other hand, if abnormal document transport or poor reading occurs, the reject solenoid 19
operates and discharges the original onto the reject tray 22.

FIG. 5 shows the double feed detection section.

The double feed detection roller 5 has one end supported in a fixed position, the other end movable up and down, and is biased downward by a spring 9. Reference numeral 8 denotes a differential transformer, which detects the paper thickness by the movement of the double feed detection roller 5. The detected paper thickness is compared with a preset paper thickness, and it is detected whether the transported document is one sheet or multiple sheets.

FIG. 6 is an overall flowchart.

When the document is detected by the paper feed sensor (step)
, Check whether there are multiple deliveries (step 2), and whether there are consecutive deliveries (s
t e p 3) For normal items with no double feeding or continuous feeding, the barcode is read (step 3).
4) If the barcode was read normally, it will be photographed by the camera. 5) If an abnormality is detected (
(double feeding, continuous feeding, poor reading), the reject solenoid discharges the original (step 7).

According to the above flow, the document is photographed while reading the barcode of the document and creating an index.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, if the gap between the conveyance roller and the separation roller is too wide due to improper adjustment, separation will be poor, and all documents will be fed in duplicate until the documents are exhausted, resulting in rejection. Also, when handling originals of various paper thicknesses, if you send thick paper while leaving the thin paper setting, there will be many rejections, which will reduce work efficiency as described above. Ta.

[il! Means for Solving the Problem] The present invention includes a conveyance roller that conveys a sheet, and a conveyance roller that is located opposite to the conveyance roller, is movable in a direction perpendicular to the conveyance direction, and is rotationally driven in a direction opposite to the conveyance direction. A separation roller that detects the thickness of the sheet being conveyed, a detection means that detects the thickness of the sheet being conveyed, and a means that compares the thickness detected by the detection means with a preset thickness, and the thickness of the detected sheet is set. To provide a sheet conveyance device characterized in that conveyance of the sheet is stopped when the condition continues to be different from the thickness of the sheet.

The present invention prevents wasteful rejection of sheets by stopping the conveyance and prompting the paper thickness setting and separation roller adjustment when double feeding or continuous feeding occurs continuously, thereby increasing the efficiency of sheet processing. It is intended to increase the

[Embodiment] FIG. 1 shows a flowchart of an image recording apparatus that implements the present invention. In Fig. 4, when a document 1 is placed on the paper feed tray 2 and the start switch is turned on, the paper feed sensor 3 detects the document, the paper feed roller 4 rotates to transport the document (STEPI), and then the paper feed roller 4 rotates to transport the document. The thickness of the document is detected by the feed detection roller 5, and compared with a preset value, and if the thickness is greater than a predetermined amount, it is determined that double feeding has occurred. When it is determined that the document is double fed, it counts how many times the double feeding has been detected, and if it continues for a predetermined number of times, the conveying means is stopped.
issue a warning. The warning method may be by blinking an LED or displaying it on the keyboard. If a warning is issued,
The user sets the paper thickness again, adjusts the position of the separation roller, and presses the start switch again (ST
EP3).

On the other hand, if the document is sent normally, the transportation is checked and the barcode is read (STEP
5) Either take a picture with the camera (STEP 6) or it will be rejected (STEP 7). Depending on the position adjustment of the separation rollers, double feeding may not occur, and continuous feeding (feeding in succession, but not overlapping) may occur frequently. When transportation occurs, an error such as counting it as one page occurs because the two documents are connected, so in this case as well, the document is rejected, but this continuous feeding is also due to poor separation (improper adjustment of the separation roller). Therefore, if double feeding occurs continuously, the second flow will stop the conveyance.
It is shown in the figure.

[Effect of the invention] As explained above, double feeding occurs when conveying sheets.

By stopping the transport when transport continues, it is possible to minimize wasteful ejects due to incorrect initial settings such as paper thickness.

[Brief explanation of the drawing]

1 and 2 are flowcharts of the present invention, and FIG. 3 is a flowchart of the present invention.
FIG. 4 is a sectional view of the above-mentioned apparatus; FIG. 5 is a configuration diagram of a double feed detection section; and FIG. 6 is a flowchart of a conventional example. 4 is a paper feed roller 5 is a double feed detection roller 7 is a separation roller 8 is a differential transformer 18 is a barcode reading means 28 is a camera FIG.

Claims (1)

[Scope of Claims] A conveyance roller that conveys the sheet; a separation roller that is positioned opposite to the conveyance roller, is movable in a direction perpendicular to the conveyance direction, and is rotationally driven in a direction opposite to the conveyance direction; It has a detection means for detecting the thickness of the sheet being conveyed, and a means for comparing the thickness detected by the detection means with a preset thickness, and detects a state in which the detected thickness of the sheet differs from the set thickness. A sheet conveying device characterized in that the conveyance of the sheet is stopped when this continues.