JP2002296980A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming device capable of preventing an image omission and paper soil by, even in case a incorrect sheet size is instructed, detecting the actual length of a sheet, thereby instructing a user to correct the size when the actual size is different from the instructed size and by temporarily storing received data into a memory and stopping a recording operation after a size error warning is issued. SOLUTION: The device has sheet feed trays which correspond to regular sizes or a manual insertion tray. The device also has a means for instructing the size of a sheet to be fed, and an image forming means for forming an image based on the instructed sheet size and develops, transfers, and fixed the image thereon. The device further has a detection means for detecting the instructed size of the sheet in the restricted tray and the length of an actually set sheet, and a warning means for issuing a warring as a size error when the instructed size is different from the detected size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an image forming apparatus for a facsimile or the like.

[0002]

2. Description of the Related Art Conventionally, a rotary unit which has a paper feed tray or a manual feed tray corresponding to a plurality of standard sizes and has a simple structure and can be used at low cost as means for indicating the size of paper to be fed. You are using a type paper indicator.

[0003]

In such a case, if the designated paper size and the actual designated paper size are set differently at the time of reception, depending on the combination of the received data size and the actual paper size, the received image size may be reduced. Missing information sometimes occurred. If output is performed in a different size, reception ends with image information missing, and is transferred to a portion other than the paper, which causes a problem of the next paper stain.

Therefore, an object of the present invention is to detect the actual paper length even if the designated paper size is erroneously designated, and if the designated paper size is different from the designated size, warn the user of a size error and change to the correct designated size. The object of the present invention is to provide an image forming apparatus capable of temporarily storing received data in a memory and stopping a recording operation after a warning of a size error to prevent image loss and paper stain. Things.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a paper feed tray or a manual tray corresponding to a plurality of standard sizes, The image forming apparatus according to claim 1, further comprising: a unit for instructing a tray, and an image forming unit for forming, developing, transferring, and fixing an image based on the designated sheet size. And a warning means for prompting a warning as a size error when the designated size and the detected size are different from each other.

According to a second aspect of the present invention, in the first aspect of the invention, when the designated size and the detected size are different, the subsequent image data is temporarily stored in a memory and the recording operation is stopped. It is a feature.

According to a third aspect of the present invention, in the first aspect of the present invention, if the correct paper indicated size is not changed within a predetermined time, the stored image data is output according to the actual paper size. It is characterized by being recorded in.

According to a fourth aspect of the present invention, in the first aspect of the invention, if the correct paper size is not changed before the memory becomes full, the stored image data is adjusted to the actual paper size. It is characterized by recording by an output method.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a sheet size detection plate of a commonly used paper feed tray in an image forming apparatus, which is set by a user in accordance with the sheet size on which the sheet size detection plate is set. I have.

FIG. 2 is a block diagram showing the configuration of the embodiment of the present invention. In FIG. 2, reference numeral 1 denotes a tray paper size instruction unit, and a user inputs a paper size for a paper size set in a paper feed tray by using a paper size detection plate as shown in FIG. Reference numeral 2 denotes a sheet length detecting unit which detects the sheet length based on the ON / OFF time of a sensor in front of a registration roller of a sheet feeding unit (not shown). Reference numeral 3 denotes a size error determining unit that determines a size error when a combination in which an image is likely to be missing is obtained based on information obtained by the tray sheet instruction size unit 1 and the sheet length detecting unit 2. . As a combination that can cause image loss, for example, A3
Tables having a recording unit capable of vertical recording have the following (Table 1) and (Table 2).

[0011]

[Table 1] When indicated size length> detection length

[0012]

[Table 2] When indicated size length <detection length

Reference numeral 4 denotes a warning means for the user. When a size error is determined, a size error is displayed on the operation panel, or a warning lamp prompts the user to adjust the paper size to be appropriate. . Reference numeral 5 denotes a memory which holds all subsequent data when the received image data is determined to be a size error. Reference numeral 6 denotes an optimum output calculation unit which performs scaling so that image loss does not occur at the time of forced output in a combination in which image loss occurs.
Alternatively, it is determined that divided output is to be performed.

Reference numeral 7 denotes a control unit which controls the above items and transmits a recording signal to the recording unit 8 to print image data.

FIG. 3 shows a flowchart of an operation example of the first aspect of the present invention. If the recording operation is an output at the time of FAX reception, the first sheet length of the sheet actually passed by the sheet length detecting means 2 is measured and compared with the indicated size of the sheet feeding tray. If it is the size, the subsequent output is performed in a normal recording operation. If the sizes are not the same, a size error is displayed on the operation panel, or a warning lamp prompts the user to adjust the paper size to be appropriate. At this time, even if a size error occurs, the recording operation is not stopped and the image data is output to the end.

FIG. 4 shows a flowchart of an operation example of the second aspect of the present invention. If the recording operation is an output at the time of FAX reception, the first sheet length of the sheet actually passed by the sheet length detecting means 2 is measured and compared with the indicated size of the sheet feeding tray. If it is the size, the subsequent output is performed in a normal recording operation. If the size is not the same, the operation panel will display a size error message or a warning lamp will prompt the user to adjust the paper size, and at the same time, store all image data from the first page to the last page. 5, the recording operation is stopped after the first sheet is output, and the image data thereafter is received by the memory 5.

FIG. 5 shows a flowchart of an operation example of the invention according to claim 3. After stopping the operation of the size error determining means 3 and the recording unit 8, if it is not recognized that the size has been changed to the proper designated size even after the set time has elapsed, the paper length detected by the paper length detecting means 2 The output is performed at an appropriate magnification or the divided output is performed so as not to cause image loss according to the paper size assumed from the above.

FIG. 6 shows a flowchart of an operation example of the invention according to claim 4. After stopping the operation of the size error determining means 3 and the recording unit 8, if it is not recognized that the size has been changed to an appropriate designated size before the capacity of the memory 5 becomes full, the paper detected by the paper length detecting means 2 Either output is performed at an appropriate magnification or divided output is performed so that image loss does not occur in accordance with the paper size assumed from the longest.

[0019]

The present invention is as described above. According to the first aspect of the present invention, when the specified size of the paper feed tray and the actually set paper size are different, the paper length detecting means is used. This has the effect of making it possible to judge a size error and prompt a warning to correct the size to an appropriate designated size.

According to the second aspect of the present invention, after detecting the size error, the image data is held in the memory, and the recording operation of the second and subsequent sheets is stopped, so that the image information with the missing image is not output. This has the effect.

According to the third and fourth aspects of the present invention, after detecting the size error, the image data is held in the memory.
Forced output after a certain condition has the effect of preventing memory erasure due to sudden power interruption.

[Brief description of the drawings]

FIG. 1 is a perspective view of a paper size detection plate according to an embodiment of the present invention.

FIG. 2 is a block diagram of a configuration of the embodiment.

FIG. 3 is a flowchart of an operation example of the invention described in claim 1;

FIG. 4 is a flowchart of an operation example of the invention described in claim 2;

FIG. 5 is a flowchart of an operation example of the invention described in claim 3;

FIG. 6 is a flowchart of an operation example of the invention described in claim 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tray paper instruction size means 2 Paper length detection means 3 Size error judgment means 4 Warning means to user 5 Memory 6 Optimum output calculation unit 7 Control unit 8 Recording unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) H04N 1/21 H04N 1/21 F term (Reference) 2C061 AP03 AQ06 HH01 HH03 HJ06 HK07 HK23 HL01 HN02 HN22 HV11 HV32 2C087 AA03 AC08 BC06 CA03 CB02 DA07 DA11 DA17 2C187 AC07 AD03 HA27 2H027 DA01 DA35 DA36 DA38 DC10 DC19 DE07 DE09 ED01 ED04 ED16 EE05 EE07 EF06 EK03 EK04 EK15 FA05 FA25 FA35 FB07 FB13 FB14 GA47 GA07 GB04 A07 5

Claims (4)

[Claims] 1. A paper feed tray or a manual feed tray corresponding to a plurality of standard sizes, a means for designating a paper size to be fed, and an image image being formed based on the designated paper size. In an image forming apparatus provided with image forming means for developing, transferring, and fixing the sheet, a detecting means for detecting a designated sheet size of the tray and a sheet length actually set, and a size when the designated size differs from the detected size. An image forming apparatus comprising: a warning unit that prompts a warning as an error. 2. The image forming apparatus according to claim 1, wherein when the designated size and the detected size are different, the subsequent image data is temporarily stored in a memory, and the recording operation is stopped. 3. The image according to claim 1, wherein if the paper size is not changed to the correct paper size within a predetermined time, the stored image data is recorded by an output method adapted to the actual paper size. Forming equipment. 4. The apparatus according to claim 1, wherein, if the paper size is not changed to the correct paper size before the memory becomes full, the stored image data is recorded by an output method according to the actual paper size. Image forming device.