JP3944294B2 - Scanner device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scanner device used for reading a form or the like .
[0002]
[Prior art]
There are two types of conventional image scanner devices , one that takes a form of moving an original using a contact sensor and the other that moves a reducing optical system such as a CCD and a lens to read the original.
[0003]
The former is often used as a portable system for a popular machine, and the latter is used for business purposes on a desktop or stand-alone system. In particular, the latter may take the form of automatic feeding using ADF.
[0004]
[Problems to be solved by the invention]
Popular machines that take the form of moving documents are low-speed processing due to the use of contact sensors, and the specifications are not suitable for batch processing, limited to form specifications, restrictions such as addition of print processing and inability to sort forms. is there. Further, a high-class machine that takes the form of movement of the reduction optical system is satisfied only by batch processing using ADF, but does not satisfy the above-described specifications.
[0005]
In view of this, a scanner device for reading a form having a value-added function such as an ADF, a printing process, a form sorting process, etc., which is equipped with a reduction optical system that takes the form of document movement and provides stable image extraction has been considered. .
In such a scanner device, the reading unit is provided with a member made of a material having high optical transparency so as to secure a stable conveyance gap and not be affected by deformation or warping of the form. A cleaning mechanism is required for this member in order to maintain high transparency.
SUMMARY OF THE INVENTION An object of the present invention is to provide a scanner device provided with a highly transparent member that is biased by a reading unit to ensure a stable conveyance gap for a form, and provided with a cleaning mechanism for the highly transparent member. is there.
[0006]
[Means for Solving the Problems]
The scanner device according to the present invention includes a conveyance guide that guides a sheet fed in a predetermined direction one by one by a driving roller by a planar guide surface, and a member having high optical transparency, one side of which is a guide surface of the conveyance guide. A reading guide guide that is urged and mounted so as to maintain a stable conveyance gap between the optical guide and the other side of the member with high optical transparency, and the conveyance guide through the member with high optical transparency. A reduction optical system fixedly arranged for reading a form located between the conveyance gaps and a member with high optical transparency are connected to the high optical transparency member in the same sub-scanning direction as the conveyance direction of the form. A push-pull solenoid that reciprocates along the optical axis, and a fixed optically arranged portion outside the reading field of view by the reduction optical system, and a portion with high optical transparency by the push-pull solenoid. By the reciprocating motion, [0009] characterized in that a cleaning brush that contacts the surface facing the reduction optical system of this highly optical clarity member
DETAILED DESCRIPTION OF THE INVENTION
1 is an external view of the scanner apparatus of the present invention, FIG. 2 is an internal configuration of the apparatus, and FIG. 3 is a view showing a state in which the interior of the scanner apparatus body is opened by rotating the scanner apparatus body around a hinge mechanism. . As is clear from the figure, in the scanner device of the present invention, the base 1 including the sheet feeding unit 3, the power supply unit 11, and the control unit (PCB 12) substrate is fixed, and the scanning device main body 2 including the stackers 5 and 6 is hinged. A shell configuration configured to be rotatable about the mechanism 4 is employed. The scanner apparatus body 2 includes a transport system 21, a reading unit 22, and a printing unit 23. Details of each will be described later. In FIG. 3, the periphery of the reading unit 22 shown in a circle is the main part of the present invention.
[0010]
FIG. 4 is an enlarged view showing the main part of the present invention. In the figure, 41 is a drive roller for conveying a form, 42 is a conveyance guide for guiding a form, 43 is a paper feed roller, 44 is a separator, and 45 is a reading guide. 46 is a member made of a material having high optical transparency added according to the present invention, and is mounted on the reading guide 45, and here, a hard transparent glass is used. In addition, an acrylic material or a polycarbonate material that has a high transmittance and does not easily refract light may be used. These forms 41 to 46 constitute a form guide conveyance system.
[0011]
A reduction optical system 49 includes a fluorescent lamp 491, a reflection mirror 492, an optical lens 493, and a CCD sensor 494, as shown in FIG. In the figure, reference numerals 41 to 44 denote form guide conveyance systems, which are a form drive roller, a conveyance guide, a paper feed roller, and a separator, respectively. Since the configuration of the reduction optical system is not different from the conventional one, detailed description thereof is omitted.
[0012]
As described above, in the present invention, the hard transparent glass 46 is urged and mounted on the reading guide guide 45 via the holding mechanism (not shown). In order to stably provide a color image, the reading unit 22 secures a stable conveyance gap so that the three-wavelength image is not affected by deformation or warping of the form. Although the image is stabilized by urging the hard transparent glass 46 to the reading unit 22, a cleaning mechanism is required from a long-term view. That is, a cleaning mechanism including, for example, the brush mechanism 47 and the brush drive system 48 is required between the reading unit 22 and the reduction optical system 49.
[0013]
6 to 8 are diagrams showing a configuration example of the above-described cleaning mechanism. Example shown in FIG. 6, Ru fitted with brushes 47 constituting the cleaning mechanism to a belt 61 stretched between the pulley and the idle roller 64 which is rotated by a motor 63. Then, the position of the cleaning brush 47 that is retracted out of the effective field of view of the reading unit 22 is recognized by the control unit (not shown) by the sensor 62 . Further , the brush 47 is caused to enter the effective field of view in the main scanning direction of the hard transparent glass 46 by a tricker emitted from the control unit, and is attached to the hard transparent glass 46 by reciprocating the cleaning brush 47 a specified number of times at any retreat location. It is intended to wipe out garbage that has been removed. In the drawing, reference numerals 63 and 64 denote cleaning brush drive systems, which are a drive control motor and an idler roller, respectively. In addition, you may comprise with the suction duct which uses a vacuum instead of a cleaning brush.
[0014]
FIG. 7 shows a driving system of the cleaning brush using a clutch mechanism indicated by 71 in the figure, and has a cleaning mechanism constituted by the brush 47. The rotational force transmitted from the drive motor 63 is transmitted to the brush 47 in the sub-scanning direction by the clutch 71 that repeats forward and reverse rotations every rotation, and dust adhered to the hard transparent glass 46, etc. To wipe out. FIG. 8 shows an example in which the hard transparent glass 46 is reciprocated in the sub-scanning direction by the push-pull solenoid 81 with respect to the cleaning mechanism constituted by the brush 47 . At this time, since the hard transparent glass 46 has a movable configuration, the cleaning brush 47 is naturally fixedly disposed.
[0015]
The timing at which the cleaning mechanism operates is assumed to be, for example, when the apparatus is started up, at the beginning or end of each processing batch, or when an abnormal state of the apparatus is detected. By selecting and instructing these from a control unit (not shown), the cleaning scan is repeated, and stable image acquisition is possible over a long period of time.
[0016]
【The invention's effect】
As described above, according to the present invention, the reading part in the form guide conveyance system is made of a material having high optical transparency, and the form is read by a reduction optical system that is fixedly arranged. At this point, the transparency is maintained, and this ensures stable image processing, miniaturization and low price at the same time, enabling batch processing, printing processing, and form distribution processing. You can add value to do.
[Brief description of the drawings]
FIG. 1 is a diagram showing an external structure of a scanner device according to the present invention;
FIG. 2 is a diagram showing the internal configuration of the scanner device of the present invention;
FIG. 3 is a diagram showing a shell structure of the scanner device of the present invention;
FIG. 4 is a diagram showing details in the vicinity of a reading unit of the scanner device of the present invention;
FIG. 5 is a diagram showing an embodiment of a reduction optical system used in the present invention;
FIG. 6 is a view showing an embodiment of a cleaning mechanism used in the present invention;
FIG. 7 is a view showing an embodiment of a cleaning mechanism used in the present invention;
FIG. 8 is a view showing an embodiment of a cleaning mechanism used in the present invention;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Scanner apparatus main body, 3 ... Paper feed part, 4 ... Hinge mechanism, 5, 6 ... Discharge stacker, 11 ... Power supply part, 12 ... Control part, 22 ... Reading part, 41 ... Drive system Roller 42 ... Conveyance guide 43 ... Feed roller 44 ... Separator 45 ... Read guide guide 46 ... Hard transparent glass 47 ... Cleaning brush 48 ... Drive control motor 49 ... Reduction optical system 61 ... Pulley 62 ... Position sensor, 63 ... Drive motor, 64 ... Idler roller, 71 ... Clutch mechanism, 81 ... Push-pull solenoid, 491 ... Fluorescent lamp, 492 ... Reflection mirror, 493 ... Optical lens, 494 ... CCD sensor.

Claims (1)

A conveyance guide for guiding a form fed by a driving roller one sheet at a time in a predetermined direction by a flat guide surface;
  A reading guide guide that urges and mounts a member having high optical transparency so that one surface thereof maintains a stable transfer gap with the guide surface of the transfer guide;
  A reduction optical system that is disposed on the other surface side of the member with high optical transparency and fixedly arranged to read a form located between the transport gap and the transport guide through the member with high optical transparency;
  A push-pull solenoid that is coupled to the high optical transparency member and reciprocates the high optical transparency member along the same sub-scanning direction as the conveyance direction of the form;
  A cleaning brush which is fixedly arranged outside the reading field by the reduction optical system and comes into contact with a surface facing the reduction optical system of the high optical transparency member by reciprocating movement of the high optical transparency member by the push-pull solenoid;
  A scanner device comprising:

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