JPH042523Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a document reading device used in a facsimile machine, a digital copying machine, or the like.

[Prior art] Conventionally, the original reading system used in facsimile machines, etc., has the following features: (1) An automatic document feed mechanism feeds the originals loaded on the document table into the device one by one, and an image sensor such as a CCD is used to read the originals. A device that scans a plane.

(2) A device that reads the image of a document placed on the platen by scanning an optical system such as an image sensor or a mirror under the platen in parallel, making it possible to read books, collated items, etc.

Furthermore, as described in Japanese Unexamined Patent Publication No. 56-4975, there is also a device that can read both a stationary original and a moving original using one image sensor.

However, in the system described in Japanese Patent Application Laid-Open No. 56-4975, the operator selects either the stationary document reading mode or the moving document reading mode using the mode selection switch. If the selection is incorrect, there is a problem that the appropriate reading mode cannot be selected.

On the other hand, as described in Japanese Patent Application Laid-open No. 58-105258, conventionally there are two switches: one for detecting opening/closing of the platen cover, and the other for detecting whether or not there is a document at a predetermined position on the platen. Some devices use a switch and use the time difference between the rises of detection signals from the two switches to automatically select one of the stationary document reading mode and the moving document reading mode.

Therefore, by adopting the configuration of the two switches described in JP-A-58-105258 to the reading device described in JP-A-56-4975,
It is conceivable to automatically select between the stationary document reading mode and the moving document reading mode.

However, with the two switches described in JP-A-58-105258, there is a time difference between the rising signal when the platen cover is closed by one switch and the rising signal when the document is detected by the other switch. Since the configuration automatically selects either the static document reading mode or the moving document reading mode, it is necessary to close the platen cover to automatically select either reading mode. Therefore, when the platen cover remains expanded, no rising signal is generated when the platen cover is closed, so there is a drawback that it is not possible to select any reading mode. This means that, for example, even if a still document is placed on the platen with the platen cover opened, the still document reading mode for reading the still document cannot be selected.

An example of a situation in which a stationary original is placed on the platen with the platen cover opened and the still original is read is when a stationary original of thick material such as a book or a collated item is placed on the platen. If the method described in JP-A No. 58-105258 is adopted, it will become impossible to read thick stationary originals such as books and collated materials placed on the platen. A problem arises.

Furthermore, in the reading device described in Japanese Patent Application Laid-Open No. 56-4975, the moving original is stored in a tray disposed inside the device, so it is difficult to collect the moving original after reading. There are also some difficulties.

In view of the above-mentioned circumstances, this invention not only enables automatic selection between stationary original reading mode and moving original reading mode, but also enables original reading even when the platen cover is expanded. Further, it is an object of the present invention to provide a reading device that allows easy recovery of a moving document after reading.

[Means for solving the problem] In order to achieve the above-mentioned purpose, in this invention,
a first platen section for reading a stationary document; a second platen section arranged in parallel with the first platen section; a second platen section for reading a moving document;
a document holder for stacking sheet originals; an automatic document transport mechanism that automatically feeds the sheet originals one by one from the document holder to the second platen section;
a platen cover that covers only the platen portion of the platen in a manner that can be opened and closed;
In a second mode in which a stationary original placed on the platen of the document is read, and a moving original is read, the original is stopped under the second platen and is conveyed over the second platen by the automatic document transport mechanism. In a reading device having a document reading means for reading a moving document, a accommodating portion formed on an upper surface of the platen cover for stacking and accommodating the moving documents conveyed via the automatic document conveyance mechanism, and detecting opening/closing of the platen cover. a first sensor that detects the presence or absence of a sheet original stacked on the document holder, and a second sensor that detects the presence or absence of a sheet original loaded on the document holder; and a second sensor that detects the presence or absence of a sheet original loaded on the document holder; Regardless of the presence or absence of a document, if the platen cover is opened, the first mode for reading a stationary document is selected, and a sheet document stacked on the document tray is detected, and the platen cover is opened. and a control circuit that selects the second mode for reading the moving original when the moving original is blocked.

[Function] According to the above-described reading device, since the storage section for stacking and accommodating the moving originals conveyed via the automatic document transport mechanism is formed on the upper surface of the platen cover, it is easy to collect the moving originals after reading, and the platen A first sensor detects opening/closing of the cover, and a second sensor detects the presence or absence of a sheet document loaded on the document tray.
Based on the detection signals of the first and second sensors, the first sensor reads a stationary original when the platen cover is opened, regardless of whether there is a sheet original loaded on the original table. a control circuit that selects the first mode and selects the second mode in which a sheet document stacked on the document table is detected and a moving document is read when the platen cover is closed; Because of this, it is possible to automatically select either the stationary original reading mode or the moving original reading mode, and it is also possible to read stationary originals even when the platen cover is extended. becomes.

[Example] Hereinafter, an example of the reading device according to the present invention will be described in detail.

Figure 1 shows a copying machine 1 using the reading device of the present invention.
1 is a partially cutaway conceptual perspective view of 0, particularly showing a state in which sheet originals 12 are continuously read using a second mode for reading moving originals.

In FIG. 1, a document stand 14 is placed on the side of the copying machine 10.
The sheet originals 12 stacked on this original stand 14 are guided to the upper surface of the platen cover 16 via an automatic document conveyance mechanism, which will be described later. Note that a recess 16a is formed on the upper surface of this platen cover 16.
is used as a storage section 18 for the sheet original 12.

Further, the platen cover 16 is supported by the casing 20 of the copying machine 10 via a connecting means such as a hinge, and is attached so as to be openable and closable so as to cover only a first platen portion, which will be described later.

Furthermore, a housing 20 facing the platen cover 16
and on the bottom surface 14a of the document table 14, there are first plates for detecting opening/closing of the platen cover 16, respectively.
A sensor 22 and a second sensor 24 for detecting the presence or absence of a sheet original 12 are arranged. Note that the first and second sensors 22 and 24 are constituted by micro switches, photo sensors, or the like.

On the other hand, a platen portion 26 is disposed within the housing 20 as shown in FIG. 2 taken along the AA cross section of FIG. This platen section 26 is divided into a first platen section 28 for loading stationary documents (including books, collated items, etc.) and a second platen section 34 on which rollers 30 and 32 are in close contact. There is. Also,
The sheet original 12 loaded on the original table 14 is transported by an automatic document transport mechanism (hereinafter referred to as ADF) consisting of rollers 36, 38, 40 and a belt 42.
The sheets are successively conveyed one by one to the second platen section 34 by a feeder 44, and further conveyed by rollers 30 and 32 to the storage section 18 of the platen cover 16, where they are stacked and stored. Further, below the platen section 26, a document reading means 46 for reading the document is provided. The image sensor 48 of the document reading means 46 is an elongated solid-state image sensor composed of, for example, a CCD, and is attached to the first platen portion 2 along the guide 50.
The document on the first platen section 28 is read and scanned by moving the document 12 in close contact with the bottom of the document tray 14.
After moving below the platen portion 34, it is positioned and fixed at a predetermined position. In FIG. 2, reference numeral 52 is a recess formed in the boundary area between the first platen part 28 and the second platen part 34 of the platen part 26.
This concave portion 52 engages a convex portion 16b formed at the tip of the platen cover 16, so that the platen cover 1
Position 6.

Next, the operation of the reading device described above will be explained, and the configuration will also be explained in more detail.

First, in the first mode for reading a stationary document, the first platen section 28 is exposed by opening the platen cover 16, as shown in FIG. 3, in which the same parts as in FIG. , on which a still original 54 such as a book is placed. After that, the image sensor 48 moves from the initial position shown by the solid line to the guide 50.
The image information of the stationary document 54 is read by moving in parallel below the second platen portion 28 along the same direction.

Next, in the second mode of reading a moving document, as shown in FIG. 2, when the first platen section 28 is covered with the platen cover 16,
The accommodating portion 18 formed on the upper surface of the rollers 30, 3
It will be placed adjacent to 2. Next, the image sensor 48 of the reading means 46 moves in parallel under the platen part 26 along the guide 50 from a predetermined initial position (indicated by a chain line), and then comes into close contact with a predetermined position under the second platen part 34. stop in the state. After these operations are completed, when the ADF 44 starts, the sheet originals 12 placed on the original platen 14 are carried in one by one to the second platen section 3.
4. Next, when the sheet original 12 is conveyed over the second platen section 34 by the rollers 30 and 32, image information is read by the image sensor 48, and the sheet original 12 is further formed on the platen cover 16. The liquid is discharged into the housing section 18.

That is, according to the above-described reading device, it is possible to read a stationary original and a moving original using one image sensor, and after the reading operation, the moving original is loaded and stored in the storage section on the platen cover. Ru.

Further, in the above-mentioned reading device, the first mode for reading a stationary document and the second mode for reading a moving document are controlled by the control circuit 60 shown in the block diagram of FIG.
automatically selected by

The control circuit 60 includes a first sensor 22 that detects whether the platen cover 16 is opened or closed, a second sensor 24 that detects the presence or absence of a sheet document 12 loaded on the document tray 14, and each of these sensors. According to the detection signals of the sensors 22 and 24 and a previously set determination procedure, a first mode activation signal S ₁ for reading a stationary original is sent, or a second mode activation signal S ₂ for reading a moving original is sent. and a control device 62 that determines whether to send out the information. Incidentally, FIG. 5 is a flowchart showing the determination procedure stored in advance in the control device 62.

That is, according to the control circuit shown in FIG. 4, the second mode in which the moving document is read is activated only when the sheet document 12 is placed on the document table 14 and the platen cover 16 covers the first platen portion 28. Furthermore, regardless of whether or not there is a sheet document 12 stacked on the document table 14, if the platen cover 16 is opened, the first mode for reading a stationary document is automatically selected and started. It will be done.

In the above embodiment, one platen section 26 is divided into the first platen section 28 and the second platen section 34, as shown in FIG. Without being limited to this example, the same parts as in Fig. 2 are designated by the same reference numerals.
As shown in the enlarged view of the main part of the figure, the second platen part 34
is formed separately and is rotatably supported around a shaft 70. During the second mode of reading a moving document, one end is pushed upward by an actuator 72, and further by a cam 74. The image sensor 48 may be tilted so as to come into close contact with the second platen portion 34. By pushing up and tilting one end of the second platen section 34 in this way, the sheet original 12 is placed in a good condition on the platen cover 16.
are stacked in the storage section 18.

Further, in the above embodiment, a long image sensor 48 is used to simplify the document reading means 46, but the image sensor 48 is not a conventional optical system consisting of a mirror and a lens.
The document reading means may be configured with a CCD.

[Effects of the invention] As explained above, according to the reading device of this invention, since the storage section for stacking and accommodating the moved originals after being read is formed on the upper surface of the platen cover, it is easy to collect the moved originals after being read. Therefore, it is possible to greatly improve the efficiency of collecting the moved original after reading. In addition, a first sensor detects opening/closing of the platen cover, a second sensor detects the presence or absence of a sheet document loaded on the document tray, and a second sensor detects the opening and closing of the document tray based on the detection signals of these first and second sensors. Regardless of the presence or absence of a sheet original loaded on the document tray, when the platen cover is expanded, the first mode for reading a stationary original is selected, and the sheet original loaded on the document tray is detected; In addition, since the apparatus includes a control circuit that selects the second mode for reading a moving original when the platen cover is closed, automatic selection between the stationary original reading mode and the moving original reading mode becomes possible. Instead, it is possible to preferentially read a stationary document even when the platen cover is in an expanded state, and therefore, it is possible to reduce reading errors in the reading device as much as possible.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a copying machine showing the reading device of the present invention, Fig. 2 is a sectional view along AA of Fig. 1, and Fig. 3
The figures are a sectional view AA of Fig. 1 showing another usage mode, Fig. 4 is a block diagram showing the control circuit, Fig. 5 is a flowchart showing the judgment procedure of the control device, and Fig. 6 shows another embodiment. FIG. 12...Sheet document, 14...Document stand, 16
... platen cover, 22 ... first sensor,
24...Second sensor, 28...First platen section, 34...Second platen section, 46...Document reading means, 54...Stationary document, 60...Control circuit.

Claims (1)

[Claims for Utility Model Registration] A first platen section for reading a stationary document;
A second device is installed in parallel to the platen of the device to read moving documents.
a platen portion, a document tray arranged in parallel with the second platen portion and on which sheet documents are stacked, and an automatic document feeder that automatically feeds sheet documents one by one from the document tray to the second platen portion. a mechanism, a platen cover that covers only the first platen portion in an openable and closable manner, and a platen cover that moves in parallel below the first platen and is disposed on the first platen portion in a first mode of reading the stationary original; an original reading means for reading a stationary original, and in a second mode for reading a moving original, for reading a moving original that stops under the second platen and is conveyed over the second platen by the automatic original transport mechanism; A reading device comprising: a storage section formed on the upper surface of the platen cover for stacking and storing moving documents transported via the automatic document transport mechanism; a first sensor for detecting opening/closing of the platen cover; a second sensor that detects the presence or absence of a sheet original loaded on the document tray, and based on the respective detection signals of the first and second sensors, regardless of the presence or absence of a sheet original loaded on the document tray; If the platen cover is expanded, the first mode for reading a stationary document is selected, and if the sheet document stacked on the document tray is detected, and the platen cover is closed, the first mode is selected. Said second reading the manuscript
A reading device comprising: a control circuit for selecting a mode;