JPH0251175A - Automatic original feeder with digitizer - Google Patents

Abstract

PURPOSE:To prevent the consistency of an original from lowering caused by the original is adsorbing and repulsing the original placing surface of the digitizer by discharging the electric charge of the original and the digitizer itself with the aid of electrically conductive member which constitutes a part of the rear surface of the original placing surface. CONSTITUTION:The original M indicated image region by the digitizer 10 is carried to an original processing position 3, image-processed, and then ejected on the digitizer 10. At this time, if the original M is not triboelectrified, the electric charge of the original M is discharged through the electrically conductive member 56 which constitutes at least a part of the rear surface of the original placing surface of the digitizer 10. Thus, when the original M is ejected on the digitizer 10, it does not adsorb or repulse the original placing position and the consistency of the original M does never lower.

Description

Detailed Description of the Invention (a) Field of Industrial Application The present invention relates to an automatic document feeder used in an image forming apparatus (hereinafter referred to as a copying machine) such as a copying machine or an information recording device. It is equipped with a digitizer device for specifying the area, and the processed original is ejected to the digitizer device.
The present invention relates to an automatic document feeder with a digitizer device for loading.

(0) Prior Art Conventionally, there has been known an automatic document feeder that is equipped with a digitizer device that specifies an area on a document, and that discharges and stacks processed documents on the digitizer device. When specifying an area, the operator places the document on the document placement position of the digitizer device and specifies the area.
The document is then conveyed and placed on the document processing position by the automatic document feeder, the image of the document is read by the copying section of the copying machine at the document processing position, and the document is then transferred to the document placement position of the digitizer device. Discharge and load.

(c) Problems to be Solved by the Invention By the way, in the above-mentioned automatic document feeder with a digitizer device, the processed document is ejected and stacked at the document placement position of the digitizer device, so it cannot be used in high-speed continuous conveyance or in a low-humidity environment. ,
Processed originals are easily charged by friction, and furthermore, charges are induced on the document placement surface of the digitizer device by the charge on the conveyor belt, and when the document is ejected to the digitizer device, it is attracted to the document placement position of the digitizer device. However, there is a drawback that the integrity of the manuscript deteriorates due to repulsion. In particular, when processing a large number of originals, there have been problems such as the originals jamming near the paper ejection port or misalignment.To solve this problem, the surface of the digitizer device's original placement position has been changed. It has been proposed to construct the device from a synthetic resin sheet that is easily charged, and to conductive treatment of the synthetic resin sheet with indium or the like, but it was too expensive to put into practical use. Further, it is conceivable to provide rips or grains on the surface of the document placement position of the digitizer device, but this is impractical because the rips or grains would interfere with region designation.

Therefore, the present invention provides an original document and a document 11 of a digitizer device.
! It is an object of the present invention to provide an automatic document feeder with a digitizer device that discharges the charge on the placing surface and thereby solves the above-mentioned problems.

(d) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances. For example, as shown with reference to FIGS. 1 and 3, there is provided a digitizer device (10) for specifying an image area. and a document processing position (3
) in an automatic document feeder with a digitizer device (1) which discharges a processed document (M) onto the digitizer, the digitizer device! (10) At least a portion of the back surface of the document placement surface is made of a conductive member (56).

Note that the conductive member (56) may be made of a magnetic material.

Further, it is preferable to ground the conductive material (56).

(e) Operation Based on the above configuration, the document (M) for which the image area has been designated by the digitizer device (10) is placed at the document processing position (3).
It is conveyed to a digitizer device (1
0) is discharged above. At this time, if the original (M) is frictionally charged, the electric charge on the original CM) is transferred to the conductive member (56 ) is discharged through.

(F) Embodiments Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 3, an automatic document feeder 1 is disposed on the top of a copying machine 2.
It has a full-surface belt 7 that faces the platen 3 and is wound around a driving roller 5 and a driven roller 6. Further, one end of a shaft 32a of a motor 32 is connected to the shaft 5a of the drive roller 5, and a clock disc 3 is connected to the other end of the shaft 32a.
3 is fixed. Further, a photointerrupter 35 is disposed close to the clock disk 33, and the photointerrupter 35 counts the number of slits in the clock disk 33. A digitizer 10 for specifying the image area of the document M is disposed on the upper surface of the apparatus main body 9 above the belt 7. Two resistors 50, 50' and lead bend 51 whose positions are read respectively
It is made up of. Further, on the surface of the digitizer 10, a protective sheet 5 made of a synthetic resin sheet or the like is provided.
5 is disposed, and a conductor 56 made of an iron plate with a thickness of about 0.6 mm to 1.6 mm is disposed at the bottom, and the conductor 56 is an automatic document feeder! 1 or copier 2 is grounded. And the lead Ben 5
By pressing the area you want to specify with 1, resistor 50.5
0' generates a voltage according to its position, and this voltage is read as the setting value of the area. Note that the resistors 50 and 50' do not have enough space to place the original, but are also provided to cover the bottom of the clear key 52, registration key 53, continuous designation key 54, etc., and these keys are pressed with the Rietben 51. This allows the command to be input. Further, a paper feed tray 11 is supported on the upper part of the digitizer 10 at its back side by a hinge 37 so as to be openable and closable, and the tray 11 has a sub-tray 20 rotatably supported by a hinge 21.

Further, on the left side of the paper feed tray 11, there is a paper feed roller 13 that feeds the originals M placed on the paper feed tray 11 one by one, starting from the lowest original M, and rotates counterclockwise to feed the originals M placed on the paper feed tray 11 one by one. A conveyance belt 15 that conveys the document M, a separation belt 16 that rotates counterclockwise and separates the document M one by one, a pair of conveyance rollers 17 that conveys the document M, and a sheet sensor 36 that detects the edge of the document M. This constitutes a feeding path 19 for feeding the original M onto the platen 3. A U-shaped paper ejection path 29 is provided on the right side of the full-surface belt 7, and the path 29 includes a paper ejection sensor 22 that detects the ejection of the original M and ejects the original M onto the digitizer 10. A pair of paper discharge rollers 27 is provided.

Since this embodiment has the above-described configuration, when the copy area is not specified, the paper feed tray 11 is closed and the copying machine 2 is closed.
When the start key (not shown) is pressed, the paper feed roller 13 starts rotating and feeds the document M from the lowest position. and,
The document M is separated and conveyed from the bottom one by one by a conveyance belt 15 and a separation belt 16, and further, the document M is held and conveyed by a pair of conveyance rollers 17 and inserted between the entire surface belt 7 and the platen 3. 6 Next, as the belt 7 rotates, the document M is placed on a document placement reference (not shown) on the platen 3, and is copied by a copying section (not shown) of the copying machine 2. After copying, the document M is conveyed to the right by the full-surface belt 7 which is rotated by the driving of the drive roller 5, passes through a pair of bending guides 29, is held between a pair of paper feed/discharge rollers 27, and is placed on the digitizer 10. It is discharged.

Further, in order to specify the copy area of the document M using the digitizer 10, the paper feed tray 11 is opened upward. Next, the original is placed face up on the resistors 50, 50' and set at a predetermined position, for example, at the upper right corner. Then, use the lead ben 51 to specify two points in the area you want to specify, for example, A and A.
The copy area of 'point or B, B' is specified. Next, by pressing the registration key 53 on the lead vent 51, this area designation is set, and then when the document M as shown in FIG. The document is placed on the document placement reference, and then only the specified area is extracted by the copying machine 2 and copied as shown in FIG. Then, the original M in the copying section is conveyed to the right by the full-surface belt 7, passes through a pair of bent guides 29, is held between a pair of discharge rollers 27, and is discharged onto the digitizer 10.

At this time, even if the document M is electrically charged due to friction, the charge of the document M is discharged from the conductor 56 to the automatic document feeder 1 or the copying machine 2, and the document M is attracted to the surface of the digitizer 10. The alignment will not be disrupted due to repulsion or repulsion.

Further, the conductor 56 is always grounded, so that induction of charges by the full-surface belt 7 can be prevented.

Note that when a magnet or the like is disposed inside the lead vent 51, the magnet attracts the conductor 56 made of an iron plate, thereby preventing the lead vent 51 from falling when the automatic document feeder 1 is opened or closed. .

Further, in the above-described embodiment, since the conductor 56 is made of an iron plate, the strength of the digitizer 10 itself is improved, and it is possible to prevent the lead bend 51 from becoming loose when indicating an area.

(G) As described in detail, according to the present invention, the digitizer device has a conductive member that constitutes at least a part of the back side of the document placement surface, and the conductive member is connected to the document and the digitizer device itself. As the charge is discharged, the original and the document placement surface of the digitizer device do not remain charged for a long time, and the document may stick to or repel the document placement surface of the digitizer device, reducing the integrity of the document. can be prevented from happening.

Note that when the conductive member is made of a magnetic material, magnetic shielding properties and radio wave shielding properties are improved, and radiation noise can be prevented.

Furthermore, when the conductive material is grounded, the discharge efficiency can be improved.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing an automatic document feeder with a digitizer device according to the present invention. Further, FIG. 2 is a plan view showing a digitizer device according to the present invention, and FIG. 3 is a front sectional view thereof. Furthermore, FIGS. 4 and 5 are perspective views showing the operation of this embodiment.

Claims (1)

[Scope of Claims] 1. An automatic document feeder with a digitizer device, which is equipped with a digitizer device that specifies an image area and discharges a processed document onto the digitizer at a document processing position, comprising: An automatic document feeder with a digitizer, characterized in that at least a portion of the back surface of the document placement surface is made of a conductive member. 2. The automatic document feeder with a digitizer device according to claim 1, wherein the conductive member is made of a magnetic material. 3. The automatic document feeder with a digitizer device according to claim 1, wherein the conductive member is grounded.