JPS62174735A - Original discharging device - Google Patents

Abstract

PURPOSE:To obtain an easy-to-use original discharging device corresponding to various kinds of original by providing a control means which operates a discharging means after the read of an original image according to original thickness data from an original thickness detecting means which detects the thickness of an original. CONSTITUTION:An index 2 indicating an original setting position is provided on original platen glass 1 and an image reading means (not shown in figure) is provided on the reverse surface of the original platen glass 1. An original discharge tray 3 is arranged at the reference end part of the original platen glass 1. When an operator depresses a start switch 11, the original image is read and it is judged the original is a sheet original at the end of a microswitch 8 is turned on; and dischargeable thickness is recognized, a motor (not shown in figure) which drives an original discharging roller 7 is driven, and a roller 7 is rotated to discharge the original. Further, when a thick sheet original like a book is mounted on the original platen glass 1, the microswitch 8 is turned off, so it is recognized that the original is too thick to discharge and the motor which drives the roller 7 is not driven to perform no original discharging operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] "Industrial Application Field" The present invention relates to a sheet document discharge device of a document table of an image reading device or an image forming device such as a copying machine.

"Prior Art and Problems to be Solved by the Invention" Conventionally, a document mounting table of an image reading device, a copying machine, etc. has a transparent document table glass and a document pressing plate arranged on the top surface of the glass plate for pressing the document downward. It was configured to have an optical system and an illumination system on the lower surface of the document table glass. The operator positions the original in the designated position on the document table glass with the image reading side facing down, and
After that, the document pressure plate was pressed against the back of the document to prevent the document from floating or shifting, and then the image reading switch was turned on to read the image, and then the document pressure plate was opened and the document was taken out. . Therefore, do not open and close the document pressure plate every time you set a document (it is very annoying and inconvenient). Because of this, you cannot quickly raise the document pressure plate when you get up from the spot after image reading is completed, which results in a loss of time.Also, when setting the document, be careful not to shift the position. Although the original pressure plate was closed, care had to be taken to prevent the original from flying out when taking out the original.Furthermore, in copy machines, etc., the ratio of the work of making several copies from one original was increased. There were many cases where I would set the original, close the original pressure plate, press the copy start button, get a copy, and then immediately walk away, leaving the original under the pressure plate and forgetting about it.

In addition, conventional automatic document feeders (hereinafter referred to as A
However, this ADF has many restrictions on the size of originals that can be transported, as well as the prohibition of curls, wrinkles, holes, etc. Because the document above may be misaligned in the vertical and horizontal directions due to feeding accuracy or slippage, there are few operators who use the ADF to feed the entire sheet document, especially when scanning images of small documents or multiple documents. When reading images by arranging originals on the document tray, or when accurate alignment without misalignment is required, place the originals manually on the document tray and use the ADF, similar to copying machines without ADFs. The belt portion of the document is used simply as a document pressure plate for copying or image reading. However, ADF uses belts and conveyance means 1. C
Because of the mover stage, etc., it is heavier and more rigid than a normal document pressure plate, so opening and closing the ADF every time you change a document is extremely painful, and the high rigidity also makes it difficult to hold the document. Not only was it not possible to take advantage of the advantages of ADF, but there were also many disadvantages.

In addition, the ADF is large, heavy, and expensive because it is a driving means and conveyance means, and although it is effective for users who often make copies of many originals, in reality, there are many users who often make copies of several originals. It was not very useful for users. A similar problem also occurs in image reading devices and the like that are equipped with an automatic document ejection device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an original document discharging device that eliminates the drawbacks of the above-mentioned conventional example, allows effective use of an ADF, etc., and has an optimal document discharging function depending on the type of document.

[Structure of the invention]

[Means for solving the gap] The present invention provides a document placement table on which a document is placed when reading an image of the document, a paper ejecting means for ejecting the document on the document placement table to the outside of the document placement table, and a device for solving the problem of document thickness. This document discharging device includes a document thickness detecting means for detecting the thickness of the document, and a control device that operates a document discharging means after reading the document image in accordance with the document thickness data from the document thickness detecting means.

"Function" When a document is placed on the document placement table, the document 1 (X) The thickness detection means detects the thickness of the document, and after the image formation on the document is completed, the control device drives or discharges the document according to the document thickness data. Not driven.

"Example" Embodiments of the invention will be described below with reference to the drawings.

FIG. 1(a)(1)) shows a document table glass 1 as a document placing table of an electronic copying machine, but when using a reading element without using an optical system, it becomes a board on which reading elements are arranged. An index 2 indicating a document placement position is provided on the document table glass 1, and an image reading means (not shown) is provided on the lower surface of the document table glass 1. A document ejection tray 3 is provided at the reference side end of the document platen glass 1, and the document ejection tray 3 may be removable or may be integrated with the exterior of the image reading apparatus main body A. On the back side of the document table glass 1, there is a document pressure plate 5 having a hinge portion 4, 4°, and the document pressure plate 5 has a handle 51, and a white pressure bonding sheet 6 is attached to the surface to be pressure-bonded with the document via a sponge member. is installed. A document ejection roller 7 for ejecting the document is supported at the end of the pressure bonding sheet 6 at right angles to the direction of ejecting the document to the document ejection tray 3, and the document ejection roller 7 includes a morph (not shown) as a driving force. A drive device is located within the document pressure plate 5.

FIG. 2 is a detailed view of the hinge parts 4, 4''.Hinge part 4
, 4I, a hinge member 5a fixed to the document pressing plate 5 and a hinge member 10a fixed to the square column portion 10 are pivotally connected by a pin 4a. A microswitch 8 is fixed to the document pressure plate 5 on either side of the hinge portion, for example, on the 4° side of the hinge portion, and when the document pressure plate 5 is closed, the actuator of the microswitch 8 hits the document table and the microswitch 8 is activated. It looks like this. The hinge parts 4, 4'' are the device main body A
By inserting the square column part 10 into the square hole 9, it can be fixed in a vertically movable manner, and when a thick book, sheet manuscript, etc. is placed on the glass stage of the document table and the document pressure plate 5 is closed, it is guided to this square column part 10. By lifting the hinge portions 4 and 4', thick originals can also be held horizontally by the pressing sheet 6 of the original pressing plate 5.

FIG. 3(a) shows a case where a single sheet of original is being processed, and the microswitch 8 is in operation. And the hinge part 4,4°
indicates that it is not lifted up. Figure 3 (1)
) is a diagram for thick originals such as book manuscripts, and the hinge parts 4, 4
'' is raised along the square hole 9, and the microswitch 8 is turned off.

When the automatic document ejection function is activated, the operator presses the start switch 1 on the operation section of the image reading device A shown in FIG.
When you press 1, the original image is read, and after reading the original image, the screen shown in Figure 3 (a) is displayed.
), if the microswitch 8 is on, it is determined that the original is a sheet original, the thickness that can be ejected is recognized, and a motor (not shown) that drives the original ejection roller 7 is driven to rotate the original ejection roller 7 to remove the original. A discharge operation is performed. Figure 3 (
As shown in 1)), when a thick sheet original such as a book original is placed on the original platen glass 1, the microswitch 8 is turned off, so the original is recognized as too thick to be ejected, and the original ejection roller 7 is driven. The document ejection operation is not performed without driving the motor (FIG. 4).

The automatic document ejection mode may always be provided as a standard mode, but the mode may be configured such that the user can select the mode using a selection switch on the operation unit.

Further, in this embodiment, as shown in FIG. 1, the document ejection device using ejection rollers is raised, but air is blown out, or as shown in FIG. Alternatively, the belt 13 may be driven to perform the ejection operation.

Further, in addition to having an ejection drive device on the document pressure plate 5, the ejection device may be provided on the side of the document placement table such as the document table glass 1.

In the embodiment of the present invention, when the document pressure plate 5 is open, the microswitch 8 is also turned off, so that the automatic ejection function can be disabled.

It should be noted that a means for disabling the automatic ejection function when the document pressure plate 5 is open may be provided separately from a means for detecting lifting of the document pressure plate. After determining the thickness of the original, a rack 16 is carved into the square column part 10 of the hinge part 4I in FIG. In a configuration in which the rotary potentiometer 18 and the rotary potentiometer 19 are combined, the thickness of the document can be continuously determined.

Although we have given an example in which the height of the document pressure plate 5 is determined using only the hinge portions 4 and 4' of the document pressure plate 5, the height of the document pressure plate 5 itself may be determined without being limited to this. Without the document pressing plate 5, as shown in FIG. 7, substantially parallel light is directed toward the document from a light source 20 onto the document table glass 1 as a document placing table, and at least one light receiving element 21 is provided on the opposite side of the document. Alternatively, the document thickness may be determined according to the amount of light directed to the light-receiving element 21.

Although the embodiment describes an apparatus having an automatic document ejection device, it goes without saying that the present invention can be applied to an ADF that automatically feeds and ejects documents.

Furthermore, when the automatic ejection function is not activated, it is easier to use if the operator is provided with a special message or instruction on the tone or display, for example, ``The document cannot be ejected because it is too thick.'' ] The present invention is a manuscript drawing 13! an original stacking table on which a document is placed during reading; a paper ejecting means for ejecting the document on the document placing table to the outside of the document placing table; and a document thickness detecting means for detecting the thickness of the document;
The document ejection device includes a control device that operates the document ejecting device after reading the document image in accordance with the document thickness data from the document thickness detection device, so it is possible to create an easy-to-use document placement table that can handle a variety of document types. Obtainable.

For example, sheet originals, thin books, etc. are automatically ejected from the original table after the image is read, so there is no need for a means to take out the original, and there is no need to forget the original. In the case of thick books or curly sheet originals, the automatic ejection operation is prohibited so that the ejection device is not strained and the originals are not damaged.

[Brief explanation of drawings]

The drawings all show embodiments of the present invention, and FIG. 1 (al is a longitudinal sectional view, FIG. 1 (1)) is a perspective view, FIG. 2 is a detailed perspective view of the hinge part, FIG. 3 (a), FIG. 3 (1)) is a longitudinal sectional view showing the operation, FIG. 4 is a flowchart, FIG. 5 is a longitudinal sectional view of another embodiment, FIG. 6 is a perspective view of still another embodiment, and FIG.
The figure is a longitudinal sectional view of another embodiment. 8. e micro switch 9--square hole 10.. square column part 20.. light source 21.. light receiving element.

Claims (1)

[Claims] 1. A document placement table on which a document is placed when reading an image of the document; a paper ejecting means for ejecting the document on the document placement table out of the document placement table; a document thickness detection device for detecting the thickness of the document; A document discharge device including a control device that operates a paper discharge device after reading an image of the document according to document thickness data from a thickness detection device.