JPS6355268B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document reading device in a facsimile machine, etc., and in particular, when a read mark is imprinted and then read again while the ink of the mark is not dry, the ink may be removed from the separation roller or the like. The present invention relates to a document reading device that has been improved so that the document does not adhere to the conveyance roller.

In a facsimile machine, an operator stamps a sent mark on a sent document in order to distinguish between a document that has been sent normally and a document that has not been sent due to, for example, two documents being conveyed overlapping each other. However, if a document that has already been sent is re-sent with the ink on the mark still dry, ink may adhere to the document feeder or transport rollers and cause them to become dirty. , This can also cause the document to become dirty, resulting in image defects.

In order to solve the above-mentioned problems, the present invention prevents the feeding device and the conveyance roller from coming into contact with the stamped area, or absorbs the undried ink with an absorbing member, so that the ink can be absorbed by the ink. An object of the present invention is to provide a document reading device that prevents stains. Hereinafter, embodiments will be described in detail with reference to the drawings.

FIG. 1 shows one embodiment of the present invention.
Reference numeral 1 denotes a document placement table, 2 a separation roller, and 3 a one-way clutch connected to a drive motor (not shown), which causes the separation roller 2 to rotate. 4 is a rectangular shaft that is the center of rotation, and 5 is a back plate to which a brake plate 6 is attached. The brake plate 6 is made of chloroprene rubber, urethane rubber, or the like, and has a coefficient of friction smaller than that of the separation roller 2. A guide plate 7 is made of a thin metal plate or mylar paper, and is attached to the brake plate 6. and brake plate 6
The original can easily enter between the roller and the separation roller 2. 8
is a spring, 9 and 10 are paper guides,
11 and 13 are conveyance rollers, which are rotated by a step motor (not shown). 12 and 14 are driven rollers, 15 is a plunger solenoid, 16 is a compression spring, and 17 is a stamp, which is fixed to the tip of the plunger and is capable of continuous stamping.
18 is a stacker, 19 is a manuscript, 20 is a reader,
A detector 21 detects the leading edge and trailing edge of the document.

FIG. 2 shows the feeding section of FIG. 1, the conveyance roller 11,
13 and stamp 17 in detail, and shows the separation roller 2 and brake plate 6 of the feeding section in detail.
The back plate 5 on which is pasted is located at the center in the direction perpendicular to the document conveyance direction, that is, in the width direction of the document, and the stamp 17 is placed at a position offset from the separation roller 2. ing. Further, portions 11a and 13a of the conveyance rollers 11 and 13 corresponding to the stamp positions are made small in diameter. Note that A is a reading line.

Next, the operation of this embodiment will be explained. When a document is placed with its reading side facing down on the document table 1 and a start button (not shown) is pressed, the drive motor and step motor rotate, and the separation roller 2 rotates. The separation roller 2 and the brake plate 6 work together to feed the lowest original document to the reading section. When the leading edge of the document caught between the feed roller 11 and the driven roller 12 is detected by the detector 21, the drive motor and step motor are stopped. In the case of a facsimile device, the step motor starts rotating in response to a reception ready signal, and reading by the reader 20 starts. At this time, the drive motor does not rotate, and therefore the separation roller follows the movement of the document. Next, reading progresses, and the rear edge of the document is detected by the detector 21.
When this is detected, the rotation of the step motor is temporarily stopped, for example, for about 0.5 seconds to 1 second, by a control section and a timer (not shown) that receive the reading completion signal, and the transport of the document is stopped. At the same time, the solenoid 15 is energized, and the stamp 17 stamps the document reading surface. Furthermore, the drive motor resumes rotation in response to the reading end signal and feeds the next document. After a temporary stop, the step motor restarts its rotation, sends the stamped original 19 to the stacker 18, and causes the conveying roller 11 and driven roller 12 to bite the next original.
Thereafter, the above operations are repeated to perform reading and stamping.

In this embodiment configured as described above, even if the read mark is imprinted and reread is performed while the ink on the mark is not dry, the position of the mark and the position of the separation roller 2 will not deviate from each other. Furthermore, since the portions 11a and 13a of the conveyance rollers 11 and 13 corresponding to the mark positions have small diameters, there are no places that come into contact with the marks, and therefore there is no possibility of contamination of the feeding device or conveyance rollers with ink and of documents. This has the effect of preventing contamination.

FIG. 3 shows another embodiment of the present invention, in which an ink absorbing member 22 is wound around the small diameter portion 11a of the conveyance roller 11. An elastic body 23 such as a sponge is wrapped under the ink absorbing member 22 so that the surface pressed by the driven roller 12 is at the same height as the large diameter portion of the conveying roller 11. Felt, absorbent paper, etc. can be used as the ink absorbing member.

In this embodiment configured as described above, the ink absorbing member 22 absorbs undried ink while the document is being transported, so that the following transport rollers and reading section are not contaminated.

In this embodiment, the conveying roller is provided with an ink absorbing section, but an independent ink absorbing roller may be provided separately.

As explained above, according to the present invention, when rereading a document on which a read mark has been affixed, even if the ink on the mark is not yet dry, the ink does not stain the feeding section or the conveying section. Therefore, there is an advantage that accurate reading can be performed without contaminating the document itself.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a block diagram of the main part of FIG. 1, and FIG. 3 is a block diagram of the main part of another embodiment of the present invention. 2... Separation roller, 5... Rear plate, 6... Brake plate, 11, 13... Conveyance roller, 11a, 1
3a... Small diameter portion, 12, 14... Driven roller, 1
7... Stamp, 20... Reader, 21... Detector.

Claims (1)

[Scope of Claims] 1. An automatic document feeder that separates and feeds only one document from a plurality of documents using a separation roller, a document image reading device, and a marking device that stamps a read mark on the read surface of the document. In the document reading device according to the present invention, marking stamps are arranged so that the part where the separation roller contacts the document in a direction perpendicular to the document conveyance direction and the stamped place on the document are shifted from each other, and the marking stamp is arranged in the document conveyance path. A document reading device characterized in that a portion of one or more of the conveying rollers corresponding to the stamping location has a small diameter. 2. The document reading device according to claim 1, wherein at least one conveyance roller is provided with an ink absorbing member on the outer periphery of its small diameter portion.