JP3968938B2 - Document pressing plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a document pressing plate such as a fax machine or a copying machine, and more particularly to a document pressing plate having an ADF device that automatically conveys a document to a reading position.
[0002]
[Prior art]
Fax machines, copiers, etc. have an FBS (Flatbed Scanner) on the machine body side, and an ADF device (automatic document feeder) on the document pressing plate that can be opened and closed with respect to the machine body. When reading an original using the FBS method, open the original pressing plate, set the document on the reading surface of the main body, close the original pressing plate, and then scan the light source, mirror, etc. When an image is formed on a CCD, converted into an electrical signal, and an original is read using an ADF apparatus, the sheet-like original is conveyed one by one by an automatic original conveyance unit and provided separately from an FBS-type reading surface. The document is guided to the original reading surface, and the original is read on the reading surface.
[0003]
Some conventional ADF apparatuses are fixed to the apparatus main body and only the FBS-side pressing plate is opened and closed, and others are integrally fixed to the document pressing plate and open and close together with the pressing plate.
[0004]
In the former, since the ADF apparatus is fixed to the apparatus main body, there is a difficulty in removing the paper when there is a paper jam in the document reading unit. For this reason, an ADF apparatus that opens and closes together with the latter pressing plate is employed.
[0005]
[Problems to be solved by the invention]
By the way, in the ADF device that is integrally fixed to the pressing plate, a metal stay is incorporated at one end of the pressing plate to support each conveying roller, or this is used as a document sheet conveying guide. In this configuration, the strength is sufficient, but there is a problem that the bulk is increased, the weight is increased, and the cost is increased.
[0006]
Therefore, it is desirable that the support portion of the transport roller, the transport guide, and the like are integrally molded with the pressing plate, but the strength of the resin is insufficient. In addition, for compactness, it is necessary to assemble the transfer roller and various parts from the lower surface of the pressing plate. For this reason, the pressing plate requires an opening for assembling these conveying roller and parts. Therefore, there is a problem that the strength is further decreased and the appearance is unsatisfactory due to the exposure of parts and the like.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a document pressing plate that can sufficiently maintain the strength of the document pressing plate when the ADF device is integrally attached to the document pressing plate.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is provided on an apparatus main body having an original reading surface for a stationary original and an original reading surface for a conveyed original so as to be freely opened and closed. a document pressing plate for pressing the stationary document placed on, the document pressing plate is located on the original reading portion for a resin integrally molded Rutotomoni the transfer document includes a frame of the automatic document feeder of the one end opening The automatic document transport unit includes a plurality of transport rollers along a curved document transport path connecting the paper feed tray and the lower discharge tray, and these transport rollers are disposed on the document pressing plate. a pair of metal side frame for rotatably supporting provided, on the lower surface of the document pressing plate located above the automatic document feeder, a reinforcing stay connecting the side frames to each other in the longitudinal original conveying direction of the opening, A document pressing plate, characterized in that provided so as to cross the opening.
[0009]
The invention according to claim 2 is the document pressing plate according to claim 1 , wherein both ends of the reinforcing stay are screwed to the side frame via the document pressing plate by screws .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[0012]
First, the overall configuration of the ADF apparatus of the present invention in a facsimile apparatus or the like will be described with reference to FIG.
[0013]
In FIG. 4, reference numeral 10 denotes an apparatus main body such as a facsimile, and an openable / closable document pressing plate 11 is provided on the apparatus main body 10 so as to be openable and closable. An ADF device (automatic document feeder) 13 is provided for feeding and reading the documents one by one.
[0014]
The ADF device 13 includes a paper feed tray 14 and a paper discharge tray 15 below the paper feed tray 14. A curved document transport path 16 is formed by connecting the paper feed tray 14 and the paper discharge tray 15. A plurality of conveying rollers 17 are provided along the line.
[0015]
The conveying roller 17 includes a feed roller 18 and a retard roller 19, a first paper feed roller 20 and a first driven roller 21, a second paper feed roller 22 and a second driven roller 23 from the paper feed tray 14 side to the paper discharge tray 15. The third paper feed roller 24 and the third driven roller 25, and the discharge driving roller 26 and the discharge driven roller 27 are provided so as to face each other while sequentially feeding the paper.
[0016]
The retard roller 19, the first paper feed roller 20, the second paper feed roller 22, the third paper feed roller 24, and the discharge driven roller 27 are disposed so as to be located on the inner peripheral side of the document conveyance path 16. The feeding roller 18, the first driven roller 21, the second driven roller 23, the third driven roller 25, and the discharge driving roller 26 are arranged so as to be positioned on the outer peripheral side of the document conveying path 16. Are provided with an inner peripheral guide 28 and an outer peripheral guide 29 for forming the document transport path 16, respectively. The inner peripheral guide 28 is formed by resin molding integrally with the pressing plate 11 as a transport unit frame.
[0017]
In addition to the document reading surface 12 by ADF, an original reading glass surface 30 by FBS is formed on the apparatus main body 10, and the original set on the reading glass surface 30 of the apparatus main body 10 is pressed on the lower surface of the paper discharge tray 15. A document pressing surface 31 is formed, and when an original is set on the reading glass surface 30 in the apparatus body 10, an FBS (not shown) is activated to read an image of the original, and the original is placed on the paper feed tray 14 of the ADF device 13. When A is set, the conveying rollers 17 of the ADF device 13 are operated to convey the original along the original conveying path 16 and read the original image on the original reading surface 12.
[0018]
As shown in FIG. 1, a pair of metal side frames 32, 32 processed by sheet metal are provided on a resin original pressing plate 11, and each conveyance of the ADF device 13 is performed between the side frames 32, 32. A roller 17, that is, a retard roller 19, a first paper feed roller 20, a second paper feed roller 22, a third paper feed roller 24, and a discharge drive roller 26 are rotatably supported. each transfer dynamic device such as a gear and timing belt provided on the side frame 32 of the hinge side of the opening and closing driving motor while being connected is driven at a predetermined rotation.
[0019]
The document pressing plate 11 has an opening 33 formed between the side frames 32 and 32 in the document conveyance direction including the document reading surface 12 in the front and rear directions in the document conveyance direction . As shown, reinforcing stays 34 and 35 formed by sheet metal processing are provided from below the original pressing plate 11 so as to cross the opening 33, and both ends of the reinforcing stays 34 and 35 are attached to the original by screws 36. Screwed to the side frames 32, 32 through the pressing plate 11, and in the middle thereof, to the document pressing plate 11 by screws 37.
[0020]
The opening 33 is provided with an inner guide 28 a that holds the document moving on the document reading surface 12, and the inner guide 28 a is provided rotatably on the shaft of the second paper feed roller 22. The inner guide 28a is urged to come into contact with the document reading surface 12 by a spring that is not.
[0021]
The second driven roller 23 and the third driven roller 25 are rotatably supported by the document pressing plate 11, and the retraction roller 18 and the first driven roller 21 are provided on the ADF cover 38 as shown in FIG. Further, the outer guide 29 reaching the second paper feed roller 22 is also supported by the ADF cover 38.
[0022]
The ADF cover 38 is provided so as to be rotatable with respect to the bearing portion 40 of the side frame 32 shown in FIG. 1, and the ADF cover 38 is rotated around the bearing portion 40 to be opened, so that the ADF cover 38 enters the document conveyance path 16. The jammed document can be removed.
[0023]
Reference numeral 41 denotes a hinge receiving seat for opening and closing the document pressing plate 11 with respect to the apparatus main body 10.
[0024]
Next, the operation of the present invention will be described.
[0025]
Retard roller 19 of the ADF device 13, a first paper feed roller 20, a second paper feed roller 22, a third paper feed roller 24 and the discharge driving roller 2 6 is supported by the side frames 32 and 32 on the original pressing plate 11 An opening 38 is formed between the side frames 32, 32, reinforcing stays 34 and 35 are provided so as to cross the opening 33 from the lower part of the document pressing plate 11, and the document pressing plate 11 is interposed by screws 36. Therefore, the strength around the opening 38 of the document pressing plate 11 can be improved without increasing the number of parts.
[0026]
Further, the reinforcing stays 34 and 35 have a minimum width that can be reinforced and do not deteriorate in appearance, and can be removed, so that the driven rollers 23 and 25 located in the opening 33 can be easily replaced and maintained. .
[0027]
【The invention's effect】
In short, according to the present invention, it is possible to reduce the size of the ADF apparatus and improve the strength of the document pressing plate.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing an embodiment of the present invention.
FIG. 2 is a view showing a back surface of the document pressing plate of FIG.
FIG. 3 is a cross-sectional view of a main part viewed from another position in FIG. 1;
4 is a cross-sectional view showing the overall configuration of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Apparatus main body 11 Original pressing plate 12 Reading surface 13 ADF apparatus (automatic original conveyance part)
17 Conveying rollers 32, 32 Side frame 33 Openings 34, 35 Reinforcing stay

Claims (2)

  A document pressing plate provided on an apparatus body having a document reading surface for a stationary document and a document reading surface for a transported document so as to be freely opened and closed, and pressing a stationary document set on the document reading surface on the apparatus body, The document pressing plate includes a frame of an automatic document conveying unit at one end thereof and is integrally molded with resin, and an opening located in the document reading unit for the conveyed document is formed. A plurality of conveyance rollers along a curved document conveyance path connecting the sheet discharge tray below and a pair of metal side frames that rotatably support the conveyance rollers on the document pressing plate, A reinforcing stay for connecting the side frames is provided on the lower surface of the document pressing plate on which the automatic document conveying portion is positioned so as to cross the opening portion in the document conveying direction of the opening portion. Manuscript pressing plate.   2. The document pressing plate according to claim 1, wherein both ends of the reinforcing stay are screwed to the side frame via screws through the document pressing plate.

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