JPH0980828A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming device capable of easily copying a long size original and obtaining a copy suitable for keeping. SOLUTION: A long size original is fed to a region capable of copying on a contact glass 25, to be copied by a specified amount (an amount smaller than the size of a paper sheet by a margin) by a rotary encoder 31. The margin is formed in the end part of the paper after copying was executed in this manner. Then, the encoder 31 detects a nonfeeding jam. Further, a page number is imprinted in a marginal part by an imprinter 27.

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 such as a copying machine or a printer, and more particularly to an image forming apparatus with a long original copy function capable of easily copying a long original.

[0002]

2. Description of the Related Art It is necessary to copy long manuscripts such as sewer piping diagrams, geological survey data by boring, computer embossed paper, etc., but conventionally, all long manuscripts can be copied. It is common to use a normal copying machine to repeat partial copying of a long original without a copying machine, or to perform partial copying of a larger area using a large (wide) copying machine. Further, when copying a part of a long original, the part is extracted and placed on the contact glass to do this.

However, long originals are difficult to handle, misalignment of the respective lateral resists occurs, and inconvenience arises in pasting, and workability is also poor. In some cases, there was a problem such as damage.

In order to solve such a problem, for example, in Japanese Patent Publication No. 3-44294, an automatic document feeder (hereinafter referred to as ADF) feeds a long document onto a contact glass at a predetermined speed. In the meantime, there is disclosed a technique in which a copying operation is started at a predetermined timing while the copying operation is started to easily obtain a copy of a required portion of a long original.

[0005]

However, in the above-mentioned conventional apparatus, it is possible to easily copy a desired portion of a long original, and therefore, it is possible to copy a plurality of portions (a copy is made). There is a problem that it is difficult to store and organize the copies because no consideration has been given to the method of pasting the sheets and the order of copying.

The present invention solves such a drawback, and an object thereof is to easily copy a long original, and
An object of the present invention is to provide an image forming apparatus capable of obtaining a copy suitable for storage.

[0007]

In order to achieve the above object, the invention according to claim 1 is provided with an automatic document feeder capable of feeding a long document, and this automatic document feeder has It is characterized in that a document feed amount detection means for detecting the feed amount of the long document is provided, and the long document having a predetermined feed amount smaller than the paper size by a margin is sequentially copied.

The invention according to claim 2 is characterized in that the document feed amount detecting means is provided with a function of detecting a document feeding jam.

Further, the invention according to claim 3 is characterized in that an imprinting device for imprinting a page number or the like is provided on the rear end margin of the sheet.

In the present invention, a long document is sent by a predetermined amount (predetermined length) to the copyable area on the contact glass for copying by the document feed amount detecting means composed of, for example, a rotary encoder. Here, the predetermined amount is an amount shorter than the paper size by a margin. Therefore, a margin is formed at the end of the copied paper, and when this portion is pasted, a long copy that reproduces a long original can be obtained.

Further, whether or not the long document is normally fed can be judged from the document feed amount detected by the document feed amount detecting means, and therefore the document feed amount detecting means has a non-feed jam detecting function. Will have. Also, if the page number is imprinted on the margin by the imprinting device, the page alignment becomes easy.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram showing an embodiment of a copying machine of the present invention. This copier is AD
It is composed of F1, a main body 2, and an optional paper feeding unit 3.

The ADF 1 will be described later with reference to FIG. 2, but the main body 2 includes an image forming unit centered on the photosensitive drum 21, a plurality of paper feed cassettes 22, a manual feed cassette 23,
An optical scanning system including a fixing unit 24 and an exposure lamp 26 below the contact glass 25 is provided. Further, the option sheet feeding unit 3 has a sheet feeding tray 31 having three stages.

FIG. 2 is an overall configuration diagram of the ADF 1, and FIG. 3 is an AD.
FIG. 4 is an enlarged configuration diagram of a main part of F1, and FIG. 4 is a driven roller shaft 1 of ADF1.
It is a perspective view of the encoder 31 provided in 6a. FIG.
As shown in FIG. 3, the ADF 1 includes a calling roller 11, a document stopper 12, a separation belt 13, a separation roller 14, a grip roller 15, a driven roller 16, a registration detection member 17, a conveyor belt 18, a document table 19, and a reversing unit 41. A document discharge section 42 is provided. Also, as shown in FIG.
An encoder 31 is provided at one end of the driven roller shaft 16a.

FIG. 5 shows the entire length L of a long original and 1 of the original.
It is explanatory drawing which shows the relationship of the amount (length) a'of feeding and the size (length) a of paper.

The operation of the present invention in the long original mode will be described below. First, a long original copy mode key (not shown) is pressed to select the long original mode, the long original D is set on the original table 19, and the leading end of the original is placed in the original stopper 1.
Aim at 2. Next, when the start key is pressed, the document stopper 12 is disengaged, and the long document D is set to A by the calling roller 11.
Sent in the direction. The leading edge of the document is the registration detection member 17
After passing, the encoder 31 of the driven roller shaft 16a starts pulse counting.

When the pulse count number by the encoder 31 reaches a value preset for each designated size, the control unit stops the document feeding of the ADF 1. At this point, the portion of the long document D to be copied is the conveyance belt 1
8 is conveyed to the contact glass 25. Then, the exposure lamp 26 is turned on to start scanning.

As shown in FIG. 5, the set pulse number is set so as to feed the long original D by a length obtained by subtracting Δa (margin) from the length of the selected size of the selected paper. . The paper feed is also timed so as to coincide with the leading edge of the original. Therefore, the trailing edge of the copied sheet has a margin of Δa. Then, in this operation, the rear end of the long original D is detected by the registration detecting member 1.
It is repeated until it is detected at 7. The long document D optically scanned is sequentially accommodated in the document discharge unit 42 via the reversing unit 41.

By the way, the jam of the document causes a great deal of trouble to the user, and it is necessary to pay attention to it. Therefore, the feeding force is set to be as weak as possible so that the document is not damaged. Therefore, the document and each roller are likely to slip, but if the driven roller 16 and the long document D slip here and the driven roller 16 stops rotating, the encoder 31 also stops rotating, so the output of the encoder 31 is high. Either the level or the low level remains, and the normal pulse is not output.
From this, the control unit can detect the non-feed jam. In this case, control is performed to stop the operation of the entire device. This makes it possible to minimize the damage to the document. Further, by using the imprinting device 27 (see FIG. 1) for imprinting page numbers and the like, the page numbers of the sheets can be confirmed by sequentially imprinting the page numbers on the Δa portion.

[0020]

According to the first aspect of the present invention, by providing a blank space at the trailing edge of the paper, it is possible to easily bond the sheets in order of each page and obtain a long copy similar to a long original. Therefore, the copy can be prevented from being partially lost and can be easily stored.

According to the second aspect of the present invention, the document feed amount detecting means is provided with the document non-feeding jam detecting function, so that the jam detecting mechanism can be simplified.

According to the third aspect of the present invention, by imprinting the page in the margin at the rear end of the paper, it is possible to manage the cut paper and the order in which the paper is attached without any trouble.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a copying machine of the present invention.

FIG. 2 is an overall configuration diagram of an ADF.

FIG. 3 is an enlarged configuration diagram of a main part of an ADF.

FIG. 4 is a perspective view of an encoder provided on a driven roller shaft of an ADF.

FIG. 5 shows the entire length of a long original, the feed amount of one original,
FIG. 6 is an explanatory diagram showing a relationship between paper sizes.

[Explanation of symbols]

 1 Automatic document feeder 25 Contact glass 27 Imprinting device 31 Encoder

Claims (3)

[Claims] 1. An automatic document feeding device capable of feeding a long original, and the automatic original feeding device is provided with a document feeding amount detecting means for detecting a feeding amount of a long original, An image forming apparatus, which controls to sequentially copy a long document having a predetermined feed amount with a small margin. 2. The image forming apparatus according to claim 1, wherein
The image forming apparatus, wherein the document feeding amount detecting means has a function of detecting a document feeding jam. 3. The image forming apparatus according to claim 1, wherein
An image forming apparatus comprising an imprinting device for imprinting a page number or the like on a rear margin of a sheet.