JPS635363A - Matching method for top position for recording of recording paper in copying machine and printer - Google Patents

Abstract

PURPOSE:To make the degree of freedom in the arrangement of internal units wider, by providing a delaying circuit which can optionally set time and outputting a recording leading edge signal to an external apparatus after delaying the signal in accordance with the set value of the circuit and, on the other hand, making copying operations to proceed in the order of paper feeding, resist, and transferring and fixing irrespectively of the external apparatus. CONSTITUTION:When an external apparatus makes a printing request, paper feeding is started and, when transfer paper passes the location of a pass sensor 3, a plunger 21 is turned off and the paper is resisted at the location of a resistor roller 4 a fixed time after. Then a plunger 41 is turned on by a plunger controlling signal for resistor roller and the transfer paper is sent to a transfer side. When a delayed time has passed in accordance with the set value of a delaying time setter after the signal of the pass sensor is turned on, a recording leading edge signal is outputted to the external apparatus. Since the paper feeding, resist, and transfer are made to proceed irrespectively of the external apparatus and the recording leading edge signal is outputted in accordance with the set value of the delaying time setter in such ways, the degree of freedom in the arrangement of internal units can be made wider.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of Product X'l) The present invention is applicable to copying machines, printers, etc. using xerography, in which the leading 11'' of a recording sheet for recording light
! This relates to the alignment method n.

(Prior Art) In recent years, the demand for copying machines and laser beam printers using the xerography method has rapidly increased as high-output devices capable of producing high quality images.

Hereinafter, an example of the conventional copying machine and Laserbee 11 printer described above will be explained with reference to the drawings.

FIG. 3 is a block diagram of a copying machine and a laser beam printer.

In FIG. 3, (1) is a paper compartment in which cut sheets for recording are stored. (2) is a big-up roller with a 1-way clutch that rotates while the plunger (21) is ON.
), the printing paper is pulled up one by one into the inside of the device. (3) is a passage sensor that detects the passage of the recording paper and turns on the plunger (21) mentioned above.
- It performs OFF control and detection of paper feeding errors. (4) is a register roller with a 1-way notch, and its rotation/stop 11 is controlled by the ON-QFF of the planar notch (41). By turning off this Bran/Year (41), the register roller (4) is stopped 116,
The Vinocqua registers the stamped paper fed by the roller (2) and prevents the oblique JJ (fed diagonally by one claw) of the paper. Thereafter, the paper is fed into the interior by turning on the Brannoyer (41).

(5) is a photoreceptor drum, and the surface charge becomes O by the static elimination lamp (10).Then, by rotation, it is uniformly charged by '&4 (+ +), and further reaches point A. At point A, in the case of a copying machine, the reflected light from the document, in the case of a laser beam printer, the laser light driven by Shinichiro Data, or the recording light that hits the photoreceptor!! , this li, (1
Due to the radiation, the surface potential of the photoreceptor 1- becomes zero.

(6) is developed 'l+'i. Due to the developing bias, the toner bearing I is in contact with the photoreceptor drum (5), and is repelled and attracted to the static U image formed on the surface of the photoreceptor by the recording irradiation. This occurs once a month and a toner image is formed.

Next, when point B is reached, the toner image is transferred onto the nail by the transfer roller (7) charged by the rotation q bias.

In this way, the paper on which continuous toner images have been formed is sent to the fixing device (12) by the conveyor belt (9), where it is fixed by pressure and heat, and a copy is completed.

Conventionally, a control method as shown in FIG. 4.5 has been adopted for the timing of positioning the leading edge of the working claw and the recording light in the process described above.

That is, to align the recording head position, an input is received from an external device (original reading unit in a copying machine) to drive a plunger (41) for controlling one revolution of the register roller shown in FIG.

This control timing will be explained using FIG. 3 and FIG. 4.5.

The time chart shown in FIG. 5 (a) When the ON signal of the paper feeding plunger control
) is turned on, the pi, qua, and prowler (2) in the figure rotates, and the passage sensor (3) is also turned on. This state is the fourth
．． In Figure 5 (b). The iffl excess sensor is in the ON state.

? When the printing paper (21) is turned off after the passage sensor (3) is ON and TI, the printing paper is registered by the register roller (4) in FIG. 3 and becomes in a standby state.

Next, the recording head position signal (c) is sent from the external device to the fourth.
As shown in Fig. 5, when the data is manually input in synchronization with the recorded signal data (e), the register roller (4) must be rotated as shown by the symbol (d) in the figure. , turn on the plunger (4l). At this time, T■ is the outer circumferential distance L6 of the photosensitive drum from the recording signal incident position A to the transfer position B in FIG. 3, and M[L, of Distance difference (L.
-L. ) is converted into time from the paper conveyance speed.

(Problems to be Solved by the Invention) In this method of arranging records from IIC, 1
The outer circumferential distance L from the recording light incident position A of the emitter drum (5) to the transfer roller. And the distance L1 from the register roller (4) to the transfer roller (7) is L. ≧
There is a need to establish the relationship of L1. In addition, the mechanical mounting position of each unit was required to be at a certain degree.

The present invention has been made in view of these problems, and it expands the degree of freedom in the arrangement of the photoconductor drum, the recording light incident position, and the register rollers, and also provides a highly accurate recording head position adjustment method. It is intended to be provided.

(Means for Solving the Problems) In order to solve the problems described in (A), the present invention aims to provide a photoreceptor drum side after a certain registration time based on the arrival of the paper to the resistance pass sensor of the lining and low system. In addition, a print start position signal is output to the Togawa equipment through a delay circuit whose time can be set arbitrarily.

(Function) According to the present invention, by changing one set value of the delay time, the position of the recording header is changed by the force indicated by L, and the adjustment is made as follows. Furthermore, with this adjustment, each uninote's
=I can do seven things to absorb deviations.

(Example) FIG. 1.2 shows an example of control using the recording head alignment method of the present invention.

When there is a print request from the external ffl<fi device, the plunger (2l) shown in Fig. 3 is turned on by the signal of the paper feed plunger control (a), and the big up roller (2) shown in the same figure is turned on. It rotates and paper feeding begins.

Next, when the paper passes the position of the passage sensor (3) in the figure, after a certain period of time T1, the plunger (21) is turned to the
FFL, is rested at the register roller (4) position. The following operations are the same as in the prior art.

Then, as shown in Fig. 1.2, the plunger control (a) for paper feed is turned OFF, and then the brake/noyer (41
) is ONL and feeds the paper to the transfer side.

In addition, as shown in sign (c), the passing sensor 4H ”j
After (b) is turned on, according to the setting value of the delay time setting device,
After the delay time has elapsed, the recording head position signal is output to the external device.

In this way, paper feeding, registration, and sending to transfer proceed in 111 (relationships) with external equipment, and the recording head position signal is output according to the setting value of the delay time setting device, so the recording head position can be adjusted. It is something that can be made into self+l+.

(Effects of the Invention) As shown in [below], the tree invention is based on the time setting II for the CI,
A high-performance delay circuit is installed, and the recording start position signal is delayed and output to the external device according to the set value, while paper feeding, registration, and transfer/fixing proceed in a fixed time regardless of the external device. This method expands the adjustment range of the recording head position with respect to the outside hookup device, and also expands the degree of freedom in arranging the inside unit.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the control method according to the recording head alignment method of the present invention, Fig. 2 is its time schedule diagram, Fig. 3 is a configuration diagram of a copying machine or printer, and Fig. 4 is a conventional recording head positioning method. FIG. 5 is a diagram showing an example of the alignment method, and is a tile and scale diagram thereof. (1)...Kawagami Kasenoto, (2)...Pinoqua, Brawler, (3)...Passage sensor, (4)...Register roller +, (5)...Photoconductor drum, ( 2+)(
41)... Plunger O Figure 1 Figure 2 22 mouths! ! 12 Fh Figure 4 Figure 5

Claims (1)

[Claims] In response to a print request from an external device, the process proceeds from paper feeding to registration to transfer from the photoconductor drum, regardless of the timing of the external device, and the signal from the paper passing sensor is processed using a delay circuit that can set the time arbitrarily. 1. A recording start positioning method for recording paper in copying machines and printers, characterized in that recording start positioning is performed by delaying the recording start position signal of paper feeding and outputting a recording start position signal to an external device.