JPS60140281A - Temperature control method of heat roller fixing device of reader printer - Google Patents

Abstract

PURPOSE:To shorten the wait time of a large-sized reader printer by controlling the power consumption in the wait time up to when a heat roller attains to set temperature to a value much larger than that in printing operation. CONSTITUTION:A fixing part 3 consists of the heat roller 14 having a heater 13, a fixing roller 15, and a temperature detector 16, and when a power switch 17 is turned on, a printer for a reader turns on and the heater 13 starts heating operation. Maximum power consumption is necessary during printing operation, so the power consumption of the heater 13 is increased with remaining electric power during the heating wait time up to when the heat roller attains to the set temperature. Further, a switch 18 is pressed to turn off the lamp for the reader and the electric power for it is used for the heater heating. Thus, the wait timer of the large-sized reader printer is shortened.

Description

TECHNICAL FIELD The present invention relates to a temperature control method for a heat roller fixing device in a reader printer.

PRIOR ART In general, reader printers employing the dry electrophotographic method used for Figure 1 require a copying capacity of at least A2 size, and therefore the heat capacity required for the fixing roller also increases. There is a problem that it takes a long time to reach the temperature.

This problem can be solved by using a large capacity heater, and in fact,
Currently on the market, dry electrophotographic reader printers that can make copies of A2 size or larger use a heater made by Hiroshi. However, many of them require a power of ≠3.5kW or more, and the Hayabusa and Genyo H4 for home use are 1.5kW, so they cannot be used for office purposes. .

Therefore, the power consumption of a large reader printer can be reduced to 1V by 1V.
In this case, due to power consumption limitations, A3. The current situation is that it uses only a heater of the same size as an A4 size reader printer, which is considered to be a shortening of the staff's time.

Purpose The present invention has been made in consideration of the following two points, and is a heat roller fixing device that reduces the waiting time in a large-sized printer and printer, which reduces the torque of the entire device to 1.5 kW or less. A method for controlling the temperature of an apparatus is provided.

Outline/Summary of the Invention Usually, since league printers require a large amount of power even during printing, the extinguishing fJ power of the heater is determined based on the time of printing. In the conventional large size league printer used in the experiment by the present inventor, the heater capacity was 800 W, and a waiting time of 5 minutes and 52 seconds was required at room temperature (20° C.). The inventor here noted that the power consumption is lower than the n4i during the samurai time, and only during the samurai time, the heater is turned off by the excess power.71 When he came up with the idea of shortening the samurai time by increasing his power, it was 5 minutes 0.1 seconds. In addition, some recent league printers are equipped with a switch that turns the league lamp to 01.'F to save energy. So, while waiting, I turned on the league lamp at 01.
=F, we realized that the power consumption of the heater could be increased by the power consumption of the lamp, and the actual power consumption of the lamp was increased by the power consumption of the lamp.
When the power consumption was further increased and the power consumption of the heater was set to 1 kW, the service time was measured to be 4 minutes and 11 seconds.

From this, the gist of the present invention to achieve the object of the present invention is to control the heater power consumption during the waiting time until the heat roller fixing device sends it to the setting section 1 to a larger value than during printing. , and the league lamp is OF
When F is applied, the temperature is controlled to an even larger value to heat the fixing roller's surface (1).

In the following, the present invention will be described in detail with reference to the drawings.
), a lighting section (2) equipped with a lamp (12), and a fixing section (3).
)9 image forming section (4) and feeding section (5) are arranged, and the image forming section (4) has a photoreceptor (20) as its center and various known image forming devices.

When used as a league, the image of the film original (9) illuminated by the lamp (12) is mirror-f71. f8
) and is fixed in the fixing section (3).

The fixing unit (3) according to the present invention has a heater (13) inside.
A heating fixing roller (14) and a pressure roller (15) equipped with
A temperature detector (16) is provided on the top of the heat fixing roller (14) in sliding contact to detect the surface temperature rll.

On the other hand, the frost switch (17
), a switch (18) that turns the lamp (12) to 01° during league play, and a print switch (19) are provided.

When the power switch (15) is turned on, the lamp (12) lights up and the heater (13) starts heating. When this (I8) is pressed, the lamp (12) goes out and the heater power consumption becomes Ikw.

FIG. 2 is a block diagram showing temperature control of the heat roller fixing device, and FIG. 3 shows waveforms at various parts. (22)
is the central processing unit cpu, (23) is the phase angle detector (1
6) signals and lamps (1) 110 and (25) which perform input/output such as 0N10FF signals are C-1"C which operates as a counter timer, and these constitute the microcomputer system. .In addition, the basic clock (
26) is φ-2M HZ. The CTC (25) is used in counter mode and the trigger for starting its operation is the electric C'l.
' C (25) starts counting from the rising edge of this synchronizing signal fBl, and outputs a drive pulse signal fcl when the count data obtained from the memory (23) becomes →.

Also, make sure that an interrupt occurs at this time, and C-1
” Reset the mode of C (25).

The above drive pulse tq is the heater 0N10FI” signal (1)
) and an AND circuit (29), and is sent to the solid state relay SS+t (30). The SSR (30) includes a pulse transformer and is capable of phase control.
The driving pulse (C) energizes the heater (13) in a waveform like (El).The phase angle I of this waveform 4 is
I1'D is determined as a program, and in this embodiment, when the heater is turned off, the power is 1kw), 1i1),
At 900W, hi, and at 800W, 3 types are stored in the memory (2:3).

Next, the operation of this temperature control will be explained and explained using the flowchart shown in FIG. Note that the flowchart describes only the parts related to the present invention, and other parts are omitted.

When the power switch (17) is turned on, the program starts, and in step ■ it is determined whether or not the lamp (12) is turned off.
By setting l-I TD to (I-11), the power consumption of the heater (13) is set to Ikw, and if it is not turned off, by setting ■1"D to OFF in step ) consumption power is 900 W. After turning on the heater (13) in step ■,
In step 2, it is determined whether the surface temperature of the heating fixing roller (14) is [1] or less than the set temperature (li). If so, repeat steps ■ to ■.

Next, in step (2), ILrD is set to (I,), thereby reducing the power consumption of the heater (13) to 800W. Then, in step (2), the surface temperature of the heating fixing roller (14) (
1) Determine whether the temperature is higher than the set temperature (1”o),
If the above is true, turn off the heater (13) in step ■, otherwise turn off the heater (13) to θ in step @.
to. Thereafter, by repeating steps ① to ②, the surface of the heat fixing roller (14) /111
degree (1) to maintain the set temperature (10).

In addition, steps ■ and ■ perform interrupt processing as shown in FIG. ))become that way.

Figure 6.FAT is the lamp (12
) is turned off, and Fig. 6 fbl shows the case where the electric whale switch (17) is set to UNI, and the lamp (]2) is turned off.
This is the case where F j is.

The inventor actually conducted the above experiment at room temperature (20°C) and found that the waiting time to reach the set temperature (1"o) was [3-5 minutes and 15 seconds for the former, and L2-4 minutes for the latter. 41 seconds.Also, turn on the power switch (17) and turn on the lamp (1).
When 2) was left on, the battery lasted for 5 minutes and 4 seconds. As a conventional example, when the power consumption of the heater (13) was set to 800 W and measured, it took 5 minutes and 52 seconds.

Note that the setting of the power consumption of the heater (13) is not limited to this, but is determined according to the model of each league printer. Various methods can be considered, such as using .

Effects As is clear from the above explanation, the present invention controls the power consumption of the heater during the waiting time until the heat roller fixing device reaches the set temperature to a value larger than that during printing, and also controls the power consumption of the heater to a value larger than that during printing. When (Jl"l='j), the surface of the fixing roller is heated to an even larger value, so power can be used effectively within the power consumption limit and waiting time can be shortened. .

FIG. 1III and FIG. 2 are block diagrams showing the M degree control of the heat roller fixing device according to the present invention, and FIG. 3 is a block diagram showing the waveform of '#[b flow I! ¥1.8I! Figure 4 is a flowchart explaining temperature control, Figure 5 is a flowchart explaining interrupt processing, and Figure 6 fal, fb.
1 is an explanatory diagram of temperature control characteristics and changes in heater capacity.

(12)... League lamp, (13)... Heater (14)... Heat fixing roller, (15)... Pressure roller (l'o)... Set temperature application Person Minolta Camera Co., Ltd. 1 Figure 1 (b) 0 Figure 3 Figure 6 (d) Figure 5 Time Figure 6 (b)

Claims (1)

[Claims] 1. Equipped with a heat roller fixing device, /l! In a reader printer with limited power consumption, the heater power consumption during the waiting time until the heat roller fixing device reaches the set temperature is controlled to a larger value than during printing, and that value is controlled by the reader lamp or OFI. A temperature control method for a heat roller fixing device, characterized in that the surface of the fixing roller is heated to an even larger value when the fixing roller is heated.