JP2577545B2 - Image input device - Google Patents

Description

The present invention relates to an image input device used for inputting image information to an information processing device, and in particular, to a reading device including an image sensor and an imaging lens on a document table. The present invention relates to a structure of a document table in an image input device arranged above.

-Conventional technology and problems-An image input device in which a reading device is arranged above a platen to read a document from above can specify a reading area while directly looking at the document on the platen. This is particularly convenient when reading a partial area of a document.

In such an image input device, a holding frame for fixing the document and preventing the document from floating from the platen is provided.The holding frame is attached to a portion directly below the reading device, and For convenience in setting a document, it must be provided so that it can be opened and closed freely.

In order to improve the operability when setting a document with such a device, it is necessary to separate the reading device from the platen so that the user can easily insert his hand when inserting the document, and the amount of opening of the holding frame must be reduced. I want to be as large as possible. However, if the distance between the reading device and the platen is increased,
In addition to an increase in the size of the entire apparatus, a problem arises in that the amount of light from a light source that illuminates the document surface must be increased. In particular, in an image input device, there is a demand that the illuminance on the document surface be as high as possible in order to improve the reading speed. In view of this point, increasing the distance between the document table and the reading device is a significant negative factor.

Further, since the reading device is disposed so as to cover the reading region of the document, the field of view of the operator is obstructed by the reading device, and there is a problem that it is difficult to perform the positioning operation of the document.

There is also known an apparatus which constitutes a drawer plate which can be pulled out by a digitizer and a transparent sheet which are pivotally attached to open and close, and which specifies a reading area by pressing a document surface with a document sandwiched between the platen ( For example, Japanese Unexamined Patent Publication No. 57-190457) discloses that a digitizer is expensive, and when the size of the reading area is substantially constant but the position is not constant, such as in the case of reading a stamped seal, the digitizer is used. There is a problem that the reading area must be designated for each sheet, and the operation is troublesome.

-Purpose of the Invention- The present invention has been made to provide an image input device particularly suitable for efficiently reading a partial area of a fixed area of a large number of documents, and is particularly intended for reading each document. Even if the position of the partial area varies, there is no need to re-specify the reading area one by one, and excellent operability that the reading part can be read without any trouble even on the stamped surface of a stamp or seal that is wet The purpose is to obtain an image input device.

-Means for Achieving the Object- The image input apparatus of the present invention has a document table 4 having a document mounting surface larger than the reading area of the reading apparatus 1 and is detachably mounted, and a part of the surface of the document table 4. A holding frame 5, 5a that covers only the document table 4 is attached to the document table 4 so as to be freely opened and closed. The holding frames 5 and 5a are frame-shaped, and do not include a member such as a glass plate that is in surface contact with the document surface inside a frame plate that forms the frame. A scale serving as an index of the reading area of the original 6 is provided on the frame plate of the holding frame 5 or the holding frame is provided.
5a is provided with a vernier scale 13 movable on the main frame 12 so that the original 6
To make the reading area of the image more easily recognizable.

In the reading operation, the document table 4 is pulled out, the holding frames 5, 5a are opened, the partial area to be read is positioned below the holding frames 5, 5a, the holding frames 5, 5a are closed, and the area to be read is pressed. The document 6 is moved and positioned on the document table 4 so as to be positioned in a range defined by the frames 5, 5a. Since the holding frames 5 and 5a do not have a member that makes surface contact with the document surface in the partitioned area, even if the document is moved while partitioning the wet stamping surface, ink or vermilion may be transferred or rubbed. Absent. Then, after the document table is pushed in and returned to the normal position, the document reading operation is performed.

-Example-Hereinafter, an example illustrated in the drawings will be described.

FIG. 1 is a perspective view of the entire apparatus in a state where a document table is pulled out, wherein 1 is a reading apparatus, 2 is a base, and 3 is a base 2.
An operation panel 4 is a document table, 5 is a holding frame, 6 is an imaginary line, and 6 is a document. The reading device 1 has a reading mechanism in which a light source lamp 8, a mirror 9, an imaging lens 10 and a one-dimensional image sensor 11 are mounted on a carrier 7 running in the longitudinal direction. The main scanning by electrically scanning the cells and the sub-scanning by the traveling of the carrier 7 read image information of the original 6 on the original table 4 illuminated by the light source lamp 8 by the TV scanning method. The reading area is an area surrounded by the main frame 12 and the sub-scale 13 (see FIG. 3) of the frame plate of the holding frame 5 or the holding frame 5a or a part of the surrounded area. In the illustrated state of being pulled out, the reading area is also drawn out to the near side.

As shown in FIG. 2, a rod 14 extends from the lower left of FIG. 1 to the upper right (hereinafter, the lower left side of FIG. Side is expressed as right, and the upper left side is expressed as left).
Are slidably inserted in brackets 15 and 16 fixed to the base 2 in the axial direction. The edge of the document table 4 opposite to the operation panel 3 is simply placed on the upper surface of a slide rail 17 formed on the base 2 and slides. The brackets 15 and 16 are provided near the front edge of the base 2 and substantially at the center, and the distance L between the bracket 16 and the rod supporting end 18 at the rear edge of the document table is the drawing stroke of the document table 4. This stroke L
Is set to a length that allows the holding frame 5 to be opened without interfering with the reading device 1 in front of the reading device 1 when the holding frame 5 is opened with the document table 4 pulled out. When the document table 4 is pushed in, the bracket 15 and the rod support end 19 at the front edge of the document table come into contact with each other, and the document table 4 is set at a predetermined position. It will be located immediately below the device 1.

The holding frame 5 is hinged to the right side of the document table 4 with a fulcrum pin 20, and guide pieces 21 and 22 for positioning the right side of the document 6 are fixedly provided on the document table 4 on the right side. .

As shown in FIG. 3, the holding frame 5 can have a structure having a sub-scale 13 slidably and fixedly provided in the longitudinal direction of the main frame 12, and the reading is performed by moving the sub-scale 13. A structure for designating an area can be used. It is also possible to provide scales 23 and 24 on the main frame 12 and the vernier scale 13, and to input a reading of these scales with a ten key or the like so that a narrower reading area can be designated. Holding frame 5a shown in FIG.
The guide groove 25, 25 is formed by bending both edges of the plate material into a U-shape, and the vernier 13 whose both ends are also bent into a U-shape is formed by a guide groove.
25, 25
A screw 27 that passes through a long hole 26 provided on the front edge of the main frame 12 is screwed into the screw 13 so that the vernier scale 13 can be fixed at a desired position by the screw 27. In order to further secure the original, the back of the main frame 12 and the vernier 13 (the surface that contacts the original)
The original 6 can be fixed by attaching a magnet rubber to the original and sucking the original table 4 formed of a metal plate.

Next, a procedure for setting a document on the image input device configured as described above will be described.

First, the operator pulls out the document table 4 toward the user, and opens the holding frames 5, 5a by rotating them upward. The holding frames 5, 5a can be opened up to a maximum of 180 degrees because they do not interfere with the reading device 1, but they may be held at a predetermined opening angle using an appropriate stopper or detent mechanism. Then, with the right side of the original 6 abutting on the guide pieces 21 and 22, the original 6 is placed so that the desired reading area falls within the holding frames 5 and 5 a, and the holding frames 5 and 5 a are closed. The placed document 6 is brought into close contact with the document table 4. If necessary, the original is shifted so that the desired reading area is located within the frame of the holding frame 5. If it is necessary to set a reading area narrower than the area defined by the holding frame, the reading area of the original 6 is set to the holding frame. The reading is further partially specified by inputting the reading of the scales 23 and 24 provided in 5,5a. Alternatively, if a fixed partial area in the holding frame 5, 5a is always read, the corresponding scales 23, 24
Is input, and the original 6 is set so that the reading area is located at the scale portion, and is fixed by the holding frames 5, 5a.

When the document 6 is set by the above operation, the operator pushes the document table 4 to the moving end on the back side thereof, and causes the reading device 1 to perform a reading operation. When the reading operation is completed, the document table 4 is pulled out again, the holding frames 5, 5a are opened, the read document is removed, and if necessary, a new document is set according to the above procedure.

-Effects of the Invention- In the apparatus of the present invention, the reading area of the document is partitioned by the holding frame having no member that comes into contact with the area surface, so that the stamp or the seal imprinted on the document surface is read. Even if the ink and vermilion are not dried, the transfer does not cause stains, and the document can be processed continuously. Also, since the holding frame has a size smaller than the surface area of the document table, the document can be easily moved so that a desired reading area is positioned within the frame of the holding frame while the document is sandwiched, and a large number of documents can be moved. It is possible to efficiently perform a process of continuously reading a partial area of a fixed size.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention. FIG. 1 is a perspective view of the entire apparatus in a state where a document table is pulled out. FIG. 2 is a partial perspective view showing a mounting structure of the document table. FIG. 4 is a perspective view illustrating details of a holding frame. In the figure, 1: reading device, 4: platen 5,5a: holding frame, 6: document 12: main frame, 13: vernier 14: rod, 15: bracket 16: bracket, 17: sliding rail 20: support pin

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-190457 (JP, A) JP-A-57-171879 (JP, A) JP-A-60-80362 (JP, A)

Claims (3)

(57) [Claims] A reading device (1) is arranged above a document table (4) at a predetermined interval, and the document table (4) places a document placed thereon wider than a reading area of the reading device (1). The holding frame (5, 5a) for holding the document (6) between the document table (4) and the reading area of the document (6) swings upward on the document table (4). A support member (14) pivotally mounted so as to movably support the document table (4) with a predetermined stroke in a direction parallel to the surface thereof;
(17), and the platen (4) is provided with the supporting member (14),
When moved to one end of (17), the holding frame (5, 5a) is located immediately below the reader (1), and the document table (4) moves to the other end of the support members (14) and (17). An image input device characterized in that the holding frame (5, 5a) can be opened upward without interfering with the reading device (1). 2. The image input device according to claim 1, wherein a scale for designating a reading area of the document is provided on a frame plate of the holding frame. 3. The holding frame (5, 5a) includes a rectangular main frame (12) and a vernier scale (13) parallel to the short side of the main frame, and both ends of the vernier (13) are 3. The image input device according to claim 1, wherein the image input device is slidably supported on a long side of the frame in a longitudinal direction thereof.