JPH0320950B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a document conveying device that feeds a document by sandwiching it between a glass plate and a feed roller provided near a reading point for reading a document in a facsimile machine or the like. Regarding.

Configuration of Conventional Example and Its Problems FIG. 1 is a schematic configuration diagram of a conventional facsimile device, and FIG. 2 is an enlarged view of the vicinity of the reading point of another conventional device.

The originals 2 placed on the original supply table 1 are fed out one by one by a paper feed roller 3 and a separator 4.
At the pressure contact portion between the feed roller 5 and the glass plate 6 due to the action of the spring 7, the glass passes through the gap 8 while being given a required speed by the frictional force on the outer periphery of the feed roller 5, and is connected to the ejection roller 9 and the leaf spring 10. The paper is then discharged onto the paper discharge tray 11.

The document 2 is illuminated by a lamp 13 at a reading point 12, and the reflected light is focused on an image sensor 16 by a lens 15 via a mirror 14.
Note that 31 is a receiver groove portion, and 32 is a control circuit portion.

The purpose of use of the glass plate 6 is that when the leading edge of the document 2 is curled downward in the other conventional means shown in FIG. Another purpose is to prevent the lamp 13 and mirror 14 from becoming dirty due to falling paper dust, and is effective in this respect.

However, the problem here is the adhesion of dirt to the glass plate 6 at the reading point 12. The main cause of stains is ink from stamps placed on documents by facsimile users. In particular, when documents with oil-based ink that dries slowly are conveyed as they are, stains adhere to the reading point 12. The frequency increases. This stain is read as black in the image signal. For example, if there is only one stain, it will be recorded as a single line in the feeding direction of the recording paper on the receiving side, and this will not be immediately noticeable on the transmitting side. , Read point 1 after receiving contact from the receiving side
2), and if the stains occur frequently, the user is forced to call and clean each time, creating an inconvenience.

OBJECTS OF THE INVENTION The present invention has been made to address the above-mentioned problems, and it is an object of the present invention to provide a document conveying device that can prevent dirt at the reading point 12 by a simple means.

Structure of the Invention The present invention provides a thin plate member fixed to the glass plate between the feed roller and the glass plate, and the surface of the document sent out between the feed roller and the thin plate member is formed by one end of the thin plate member. The above object is achieved by configuring the reading point so that it does not come into contact with the reading point due to the difference in level between the glass plate and the glass plate.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 3 is a schematic configuration diagram of the vicinity of the reading point of a facsimile device according to an embodiment of the present invention, FIG. 4 is a schematic perspective view of the vicinity of the reading point shown in FIG. 3, and FIG. 5 is a schematic diagram of the vicinity of the reading point shown in FIG. It is an enlarged view.

The originals 2 on the original supply table 1 are fed while being sorted one by one by a separator 4 and a paper feed roller 3. The paper surface 2 that has been fed out is then further fed out while being sandwiched between a thin plate member 18 fixed to the glass plate 6 which is pressed from below by the feed roller 5 and the spring 6a.

Thereafter, the document 2 that has reached the reading point 12 is read by an image sensor (not shown) using a lamp 13 and a mirror 14, and is further fed out by a paper ejection roller 9 and a plate spring 10 to complete the reading.

The thin plate member 18 is made of stainless steel with a thickness of 0.25 mm to 0.3 mm, and is fixed to the glass plate 6 with double-sided adhesive tape, etc., and one end thereof forms a step B between the reading point 12 and the feed roller 5. are doing.

Further, the distance A from one end of the thin plate member 18 to the reading point 12 is set to about 5 to 6 mm.

The document 2 fed out by the feed roller 5 is lifted off the glass plate 6 by the step B, and since the distance A is small, if it is a normal document used in facsimile, the document 2 will be lifted off the glass plate 6 at the reading point 12. The document 2 never comes into contact with the surface of the document.

In a practical test conducted by a user who sends approximately 300 facsimile messages per day, the device according to the embodiment of the present invention had no contamination accidents after 30 days, whereas the conventional device had contamination accidents once or twice a day. is obtained.

Effects of the Invention As described above, according to the present invention, it is possible to prevent the glass plate from becoming dirty, thereby preventing unnecessary lines from appearing on the receiving screen and deteriorating the image quality, and having the effect of saving the effort of cleaning the reading point.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a conventional facsimile device, and FIG. 2 is a side view of the vicinity of the reading point of another conventional example.
FIG. 3 is a schematic configuration diagram of the vicinity of the reading point of a facsimile device according to an embodiment of the present invention, FIG. 4 is a schematic perspective view of the vicinity of the reading point shown in FIG. 3, and FIG. 5 is an enlarged partial view of the vicinity of the reading point. FIG. 5...Feed roller, 6...Glass plate, 18...
Thin plate member.

Claims (1)

[Claims] 1: a transparent plate, a pressing means for pressing the transparent plate from below, a thin plate member provided on the upstream side of the document traveling direction on the transparent plate, a feed roller that contacts the thin plate member and conveys the document; A document reading device comprising: reading means having a reading point of the document in an area downstream of the thin plate member where the document does not contact the transparent plate.