JPH06102733A - Image forming device - Google Patents

Abstract

PURPOSE:To provide the image forming device where document jamming or the damage to the document in the case an automatic document feeding device is utilized can surely be evaded. CONSTITUTION:In the image forming device provided with a document platen, an image forming means, and the automatic document feeding device, a first detection means 16 detecting the document in the automatic document feeding device, a second detection means 20 detecting that the automatic document feeding device is opened for the document platen from closed state after the image forming action by the image forming means is completed and a control means 30 controlling not to accept any instruction of image forming action start by an instructing means in the case the document is detected by the first detection means 16 when the change from closed state to open state of the automatic document feeding device is not detected by the second detection means 20 after the image forming action by the image forming means is completed unless the detection means 16 detects any document. With this constitution, the image forming action is inhibited when the document is left forgotten on the document platen and the document jamming and the damage to the document can surely be evaded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus,
More specifically, it has a manuscript table on which a manuscript is manually placed and an automatic manuscript feeding device which is arranged to be openable and closable with respect to the manuscript table and automatically supplies a manuscript to the manuscript table in the closed state. The present invention relates to an image forming apparatus such as a copying apparatus.

[0002]

2. Description of the Related Art In this type of copying machine, when a manuscript is manually placed on a manuscript table and a copy is made on a sheet and then the manuscript is left behind, the next user makes an automatic manuscript. When attempting to make a copy using the feeder, if the original is a non-standard size, thick paper, thin paper, etc., these cannot be ejected, and the copy operation using the automatic document feeder will cause a document jam condition. However, there is a problem that the original becomes damaged or the original is damaged.

[0003]

As described above, in the conventional copying apparatus, no measures are taken even if the document is left behind on the document table, and therefore the automatic document feeder is used thereafter. However, there is a problem that the copy operation is hindered.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an image forming apparatus capable of reliably avoiding a document jam and a document damage when a document is left on the document table.

[0005]

The invention according to claim 1 is
A document table on which a document is placed, and image forming means for forming an image of the document placed on the document table on an image forming body,
Instructing means for instructing the image forming means to start an image forming operation, and a plurality of originals which can be opened and closed with respect to the original table and can hold a plurality of originals. In an image forming apparatus having an automatic document feeder for feeding the originals one by one to the document table, the automatic document feeder is provided and the originals are held by the automatic document feeder. And a second detecting means for detecting that the automatic document feeder has changed from the closed state to the open state with respect to the document table after the image forming operation by the image forming means is completed. After the image forming operation by the image forming means is completed without the first detecting means detecting that the original is held in the automatic document feeder, the second detecting means is When the automatic document feeder does not detect that the document table has changed from the closed state to the open state, the first detection means detects that the document is held by the automatic document feeder. In this case, the control means is provided so as not to accept the instruction to start the image forming operation by the instruction means.

According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, the image forming operation by the image forming means is such that the original is held in the automatic document feeder by the first detecting means. When the second detection unit does not detect that the automatic document feeder has changed from the closed state to the open state with respect to the document table after the end without detecting A display unit is further provided for displaying a warning that there is a document left on the document table when it is detected that the document is held in the automatic document feeder.

[0007]

The operation of this image forming apparatus will be described below.

The control means ends the image forming operation by the image forming means without detecting the fact that the original is held in the automatic document feeder by the first detecting means, and then the second detecting means operates. When the automatic document feeder does not detect that the document table has changed from the closed state to the open state, the first detection means confirms that the document is held by the automatic document feeder. When it is detected, control is performed so that the instruction to start the image forming operation by the instruction unit is not accepted.

As a result, even if an attempt is made to perform an image forming operation using the automatic document feeder when there is a document left behind on the document table, the instruction for starting the image forming operation cannot be accepted by the instruction means, so that the document jams. It is possible to reliably avoid damage to the document.

Further, when there is a document left behind on the platen, a warning display to that effect is displayed, so that the presence of the document left behind can be clearly communicated to the user.

[0011]

EXAMPLES Examples of the present invention will be described in detail below.

1 and 2 show a copying apparatus 1 which is an example of an image forming apparatus.

The copying apparatus 1 comprises a box-shaped three-stage sheet feeding unit 3 and a box-shaped main body 2 arranged on the three-stage sheet feeding unit 3.

The three-stage paper feeding unit 3 comprises, for example, a first cassette 4 containing A4 size sheets, a second cassette 4 containing B4 size sheets, and a third cassette 5 containing A3 size sheets. Three cassettes are detachably attached.

On the upper surface of the main body 2, an original table 6 made of transparent glass is provided. Further, the original table 6 is arranged so as to be openable and closable with respect to the original table 6 and the feed original G0 is placed on the original table 6 in a closed state. An automatic document feeder 7 for automatically supplying is provided.

As shown in FIG. 1, the automatic document feeder 7 has a substantially rectangular parallelepiped shape and automatically feeds a fed document G0 from the fed document feeding section 8 to the document table 6, and also on the document table 6. Further, the fed document G0 which has reached the above-mentioned condition is automatically fed to the fed document feeding section 9.

On the front side of the upper surface of the main body 2, an operation panel 10 as an instruction means for performing various operations of the copying apparatus 1 is provided.
The operation panel 10 is provided with a key group 1 for various operations.
1, a display unit 12 for displaying various messages, a copy key 13 and the like are provided.

Further, a magnet 14 is arranged at the end of the joint surface of the automatic document feeder 7 with the document table 6, and a reed switch 15 is arranged inside the upper surface of the main body 2 corresponding to this magnet 14. Then, the magnet 14 and the reed switch 15 are used to detect the presence or absence of the use state of the automatic document feeder 7 as a first detecting means 16 as a detecting means.
Are configured.

On the right side of the main body 2 in the figure, for example, a cassette 17 containing B5 size sheets is mounted, and a manual feed guide 18 is provided on the upper part of the cassette 17. Further, on the left side of the main body 2 in the figure, the paper unit 19
Is provided.

As shown in FIG. 3, an optical sensor serving as a second detecting means for detecting the setting of the feed original G0 is provided in the installation area of the feed original G0 in the feed original feeding section 8 of the automatic document feeder 7 as shown in FIG. Such a sent document detecting means 20 is provided. In FIG. 3, reference numeral 21 is a feed document receiving tray, and 22 is a feed document guide.

Next, the main part of the control system of the copying apparatus 1 is shown in FIG.
Will be described with reference to.

The copying apparatus 1 is provided with a control means 30 for controlling the whole, and the control means 30 includes the detection means 1
6, the document detecting means 20, the key group 11, the display unit 12,
The copy key 13 and the like are connected.

Further, when the detecting means 16 indicates the state in which the automatic document feeder 7 is not opened / closed, the control means 30 is connected to the storage means 31 for storing and holding the identification information (flag 1) corresponding thereto. .

Next, the flow of operations when performing a copying operation using the copying apparatus 1 of the present invention will be described with reference to FIG.

First, the copy operation performed immediately before is
Whether or not it was performed using the automatic document feeder 7, that is, the original (the original document G0) was placed on the original document tray 21 of the automatic original document feeder 7 in the immediately preceding copying operation. It is checked whether or not it has been detected by the document detecting means 20 (ST0).

When the copy operation performed immediately before in ST0 does not use the automatic document feeder 7 (that is, when the user directly places the document on the document table 6 to perform the copy). Then, it is checked whether or not the automatic document feeder 7 is opened / closed after the copying operation with reference to the output of the detection means 16 (ST1), and the automatic document feeder 7 is checked.
If the document is not opened and closed, it is determined that the manually placed document at the time of the previous copy remains on the document table 6, and the control unit 30 writes the identification information, that is, the flag 1 in the storage unit 31. (ST2).

The storage means 31 stores and holds this flag 1. Here, the state in which the flag 1 is stored in the storage unit 31 means that the document is left on the document table 6 and is left behind. After that, it is checked again whether the automatic document feeder 7 is opened or closed (ST
3) If the automatic document feeder 7 is not opened / closed, the process directly proceeds to the next step. When it is detected in ST3 that the automatic document feeder 7 is opened or closed, the flag 1 stored in the storage unit 31 is reset.

Here, it is detected in ST0 that the previous copy operation was performed using the automatic document feeder 7 or in ST1 that the automatic document feeder 7 was opened and closed. In this case, the ST2 is skipped and the ST3 is performed.

Next, in ST4, it is determined whether or not a document is set on the feed document receiving table 21 of the automatic document feeder 7 by referring to the output of the document detecting means 20. If it is determined that the document is set, it is checked whether or not the flag 1 is stored in the storage means 31 (ST5). If it is determined that the flag 1 is stored in the storage means 31 in this ST5, the next original is set in the automatic original feeding device 7 with the original left behind on the original table 6, so that A warning message to that effect is displayed on the display unit 12 on the operation panel 10, and the above-described processing from ST1 to ST6 is repeated.

When it is determined in ST4 that the document is not set on the document feed tray 21 of the automatic document feeder 7, or when the flag 1 is not stored in the storage means 31 in ST5. If so, the ready state is entered, and the instruction to start the copy operation by the copy key 13 is accepted (ST8). Then, in ST9, it is determined whether or not the copy key 13 is pressed (ST9), and if the copy key 13 is pressed, the copy operation is performed (ST1
0), if not pressed, the process returns to ST4 to repeat the subsequent processes.

According to such control, when there is a document left behind on the document table 6, even if the document is set in the automatic document feeder 7, the document left behind is not forcibly discharged, so that a thin document or the like Even when the sheet is manually placed, the manually placed original does not cause a paper jam, and the original itself can be prevented from being damaged.

Further, when there is a document left behind on the document table 6, a warning display to that effect is displayed on the display section 12 on the operation panel 10, so that the presence of the document left behind can be clearly transmitted to the user. .

The present invention is not limited to the above-mentioned embodiments, but various modifications can be made within the scope of the invention.

[0034]

According to the present invention described in detail above, since it has the above-mentioned structure, the image forming operation is prohibited when the automatic document feeder is used in a state where the document is left on the document table. As a result, it is possible to provide an image forming apparatus capable of reliably avoiding document jamming and document damage.

Further, since a warning message indicating that there is a document left behind on the document table is displayed, it is possible to provide an image forming apparatus which can clearly inform the user of the presence of the document left behind.

[Brief description of drawings]

FIG. 1 is a perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of the automatic document feeder of the apparatus according to the embodiment of the present invention in an open state.

FIG. 3 is a perspective view showing a state in which a document to be fed is set in the automatic document feeder of the embodiment of the present invention.

FIG. 4 is a block diagram showing a control system of an apparatus according to an embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Copying device 2 Main body 6 Document table 7 Automatic document feeding device 16 Detecting means 20 Feeding document detecting means 30 Control means 31 Storage means G0 Feeding document

Claims (2)

[Claims] 1. A document table on which a document is placed, image forming means for forming an image of the document placed on the document table on an image forming body, and image forming operation for the image forming means. And an instruction means for instructing the start of the original and a plurality of originals arranged to be openable and closable with respect to the original table and capable of holding a plurality of originals. In an image forming apparatus having an automatic document feeder for transporting to a table, a first detection unit provided in the automatic document feeder for detecting that a document is held by the automatic document feeder, After the image forming operation by the image forming means is completed, a second detecting means for detecting that the automatic document feeder is changed from a closed state to an open state with respect to the original table, and an image forming operation by the image forming means are performed. The first After the detection is completed without detecting that the document is held in the automatic document feeder, the second detection unit causes the automatic document feeder to change from the closed state to the open state with respect to the document table. If the first detection unit detects that the document is held in the automatic document feeder when it does not detect the fact, the instruction to start the image forming operation by the instruction unit is not accepted. An image forming apparatus, comprising: a control unit that controls as described above. 2. The image forming apparatus according to claim 1, wherein the image forming operation by the image forming means detects that the original is held in the automatic document feeder by the first detecting means. If the second detecting means does not detect that the automatic document feeder has changed from the closed state to the open state with respect to the document table after the completion, the first detecting means detects the automatic document feeding. An image forming apparatus further comprising display means for displaying a warning that there is a document left on the document table when it is detected that the document is held in the device.