JP2728510B2 - Image forming device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an image forming apparatus in which a transfer sheet is conveyed while a document is conveyed, and an image forming process is performed. Also, the present invention relates to an image forming apparatus that can match the vertical size in a short time.

(Prior art)

In an image forming apparatus such as a copying machine, which is a background of the present invention, a transfer sheet such as a copy sheet is conveyed by driving a second motor while a document is conveyed by driving a first motor, and an image forming process is performed.

In this image forming apparatus, an adjustment for equalizing the vertical size (that is, an adjustment for making the original conveying speed and the transfer sheet conveying speed the same).
Is performed.

For example, using a document having black portions formed at regular intervals, performing image forming processing such as copy processing, and comparing the interval between the black portions of the transfer sheet subjected to the image forming process and the black portion of the document, The rotation speed of the first motor or the second motor is adjusted by trial and error until the intervals become equal.

[Problems to be solved by the invention]

In the above-described conventional adjustment method for equalizing the vertical size, since an image forming process such as a copying process is performed, it takes time and effort to prepare a transfer sheet for the image forming process.

Further, as described above, the adjustment time may be long due to the adjustment by trial and error.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an image forming apparatus capable of realizing the same size in a short time without performing image forming processing.

[Means for solving the problem]

In order to achieve the above object, the present invention provides an image forming apparatus in which a transfer sheet is conveyed by driving a second motor while a document is conveyed by driving a first motor, and an image forming process is performed. Document detection means for detecting the document, transfer sheet detection means provided in the transfer sheet transport path and detecting the transfer sheet,
Input means for giving a command to start the speed calculation of the first and second motors, and, when the input means is operated, an appropriate sheet is conveyed along the original conveying path and the original detecting means is configured to detect the sheet. First storage means for storing the detection time, and second storage means for storing the detection time of the transfer sheet detection means for conveying the sheet along the transfer sheet conveyance path and detecting the sheet when the input means is operated. An image characterized by comprising a storage means, and a calculation means for calculating the operating speeds of the first and second motors so that the data stored in the first storage means and the data stored in the second storage means match. It is configured as a forming device.

[Action]

In this image forming apparatus, when an input unit is operated and an appropriate sheet is conveyed along a document conveyance path, the sheet is detected by the document detection unit, and the detection time (sheet length) is stored in the first storage unit. .

Further, when the same sheet is conveyed in the transfer sheet conveyance path, this sheet is detected by the transfer sheet detection means, and the detection time (sheet length) is stored in the second storage means.

Then, the first storage means and the second
The operating speeds of the first and second motors are calculated such that the data stored in the storage means coincide with each other, and the operating speeds of the respective motors are corrected so that the vertical magnification is adjusted.

Therefore, it is possible to achieve the same vertical size without performing the image forming process in a short time.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

FIG. 1 is a block diagram of an image forming apparatus according to an embodiment of the present invention, and FIG. 2 is a flowchart showing a process for adjusting the image forming apparatus to the same size in the vertical direction.

The image forming apparatus 1 shown in FIG. 1 is configured around a control unit 2 including a microcomputer CPU and the like,
The control unit 2 includes a document detection switch SW1 as an example of document detection means, a transfer sheet detection switch SW2 as an example of transfer sheet detection means, a first motor 3 for transporting a document, a second motor 4 for transporting a transfer sheet, and The input switch 5 is connected.

The document detection switch SW1 is provided in the document transport path, and detects a document transported by driving the first motor 3.

The transfer sheet detection switch SW2 is provided in the transfer sheet conveyance path, and detects a transfer sheet conveyed by driving the second motor 4.

The input switch 5 is operated when the same size of the image forming apparatus 1 is set to the same length and the first and second motors 3 and 4 described later.
Is an example of input means for giving a command to start the speed calculation.

The control unit 2 stores a RAM 2 _a for temporarily storing data and a sequence program of the image forming apparatus 1.
It has a ROM2 _b.

Next, steps S1, S2,... Will be sequentially described with reference to FIG.

When the input switch 5 is operated to make the image forming apparatus 1 equal in length (S1), the operation of the first motor 3 is started at an appropriate speed (S2).

When the appropriate sheet for example A4 paper is inserted into the document insertion port 6 shown in FIG. 1, the sheet arrows X _1, X ₂
Are transported in the document transport path shown in FIG.

The conveyed sheet is detected by the document detection switch SW1, and the detection time is stored in the RAM _{2a of the} control unit 2 (S4).

When the input switch 5 is operated, the sheet is conveyed along the document conveyance path, and the RAM _2a that realizes a function of storing a detection time of the document detection switch SW1 for detecting the sheet is an example of a first storage unit. It is.

Further, the operation of the second motor 4 is started at an appropriate speed (S5).

When the sheet is inserted into the transfer sheet insertion port 7 shown in FIG. 1, the sheet is conveyed along the transfer sheet conveyance path indicated by arrow Y (S6).

The conveyed sheet is transferred sheet detection switch SW2
And the detection time is stored in the RAM _{2a of the} control unit 2 (S7).

The RAM _2a that realizes the function of storing the detection time of the transfer sheet detection switch SW2 that conveys the above-described sheet along the transfer sheet conveyance path and detects the sheet is an example of a second storage unit.

Then, in the next step S8, the detection time data of the document detection switch SW1 stored in the RAM _2a is set so that the detection time data of the transfer sheet detection switch SW2 matches the detection time data.
The operating speeds of the first and second motors 3 and 4 are calculated, and the operating speeds of the respective motors are corrected so as to have the same vertical length.

Therefore, by simply operating the input switch 5 to insert an appropriate sheet into the document insertion slot 6 and the transfer sheet insertion slot 7, it is possible to match the vertical size in a short time.

Further, since the process of matching the vertical size is performed without performing the image forming process, the sheet can be used again, and the preparation thereof does not take much time.

Document detection switch SW1 stored in RAM _2a described above
The means for realizing the function of calculating the operating speeds of the first and second motors 3 and 4 so that the detection time data of the transfer sheet detection switch SW2 matches the detection time data of the transfer sheet detection switch SW2 is an example of the calculation means.

〔The invention's effect〕

According to the present invention, in an image forming apparatus in which a transfer sheet is conveyed by driving a second motor while a document is conveyed by driving a second motor and an image forming process is performed, a document detection provided in the document conveying path to detect the document Means,
A transfer sheet detecting means provided in the transfer sheet transport path for detecting the transfer sheet; an input means for giving a command to start a speed calculation of the first and second motors; A first storage unit that stores a detection time of the document detection unit that conveys a sheet along the document conveyance path and detects the sheet; and, when the input unit is operated, transfers the sheet along the transfer sheet conveyance path. Second storage means for storing the detection time of the transfer sheet detection means for conveying and detecting the sheet, and first and second motors in which the storage data in the first storage means and the second storage means match. And an operation means for calculating the operation speed of the image forming apparatus.

Therefore, it is possible to achieve the same vertical size without performing the image forming process in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram of an image forming apparatus according to an embodiment of the present invention, and FIG. 2 is a flowchart showing a process for adjusting the image forming apparatus to the same size in the vertical direction. [Description of Signs] 1 ... Image Forming Apparatus 2 ... Control Unit _2a ... RAM (First and Second Storage Means) 3 ... First Motor 4 ... Second Motor 5 ... Input Switch (Input Means) SW1 …… Document detection switch (document detection means) SW2 …… Transfer sheet detection switch (transfer sheet detection means)

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-83770 (JP, A) JP-A-61-73941 (JP, A) JP-A-59-182465 (JP, A) JP-A 60-83465 166965 (JP, A) JP-A-1-193769 (JP, A) JP-A-2-282138 (JP, A) JP-A-56-52777 (JP, A) JP-A-58-220152 (JP, A) JP-A-53-131042 (JP, A) JP-A-2-144559 (JP, A) JP-A-2-75645 (JP, U)

Claims (1)

(57) [Claims] An image forming apparatus configured to convey a transfer sheet by driving a second motor to perform image forming processing while driving a document by driving a first motor; and detecting the document provided in the document conveying path. Document detecting means for detecting the transfer sheet provided in the transfer sheet conveying path, input means for giving a command to start the speed calculation of the first and second motors, and operation of the input means A first storage unit that stores a detection time of the document detection unit that conveys an appropriate sheet along the document conveyance path and detects the sheet; and that the sheet is stored when the input unit is operated. A second storage unit that stores the detection time of the transfer sheet detection unit that conveys the transfer sheet in the transfer sheet conveyance path and detects the sheet; the first storage unit and the second storage unit Image forming apparatus characterized by storing data obtained by and a calculating means for calculating a driving speed of the first and second motor so as to coincide.