CN101470391A - Image forming apparatus, and method of controlling warming-up time of image forming apparatus - Google Patents

Abstract

The invention provides an image forming device and a preheating time control method. In the image forming equipment, it is usually based on the time basis, while the warm-up time of the fixing device is fixed, and when the temperature of the fixing part may be lower than the set temperature, it can prevent the fixing due to insufficient power. bad. It sets a fixing control device 700, when the power supplied to the fixing device 600 at the start of preparation is lower than the necessary power, for example, the power normally supplied to the fixing device is 1200W, but actually it is 1080W (10% reduction) , switch from the time priority mode (time basis) in which the fixing device is determined to be capable of fixing by the time from the start of preparation to the specified time, to the time when the temperature of the fixing belt (fixing member) 30 reaches the specified temperature to determine that the fixing device can be fixed. In the temperature priority mode (temperature reference) of the fuser.

Description

Image forming device and warm-up time control method

technical field

The present invention relates to image forming devices such as copiers, printers, facsimile machines and compound machines thereof. In particular, it relates to an image forming apparatus including a fixing device that passes a recording material between a heated fixing member and a pressing member pressed thereon, and fixes toner on the recording material by pressing and heating in the recording material. And in such an image forming apparatus, a warm-up time control method for controlling the warm-up time of a fixing device.

Background technique

Generally, in an electrophotographic image forming apparatus, after the drum-shaped or belt-shaped photoreceptor is rotated, charging and writing are performed on the photoreceptor to form an electrostatic latent image, and then the toner is transferred to the developing device. The toner is attached to it for visualization to form a toner image, and then the toner image is directly or indirectly transferred to recording materials such as paper and resin film through an intermediate transfer body, and passed through a fixing device To fix the transferred image to record the image in the recording material.

In such an image forming apparatus, a generally used fixing device is that, in the fixing nip between the heated fixing member and the pressing member pressed thereon, after the recording material is passed through and heated and pressed, the heated The melted toner adheres to the recording material by pressure to complete the fixation. The fixing member can be in the form of a roll or a belt. When a roll is used, a heat source such as a halogen lamp or an IH coil is built into it for heating. In, or around the tire belt.

However, in this fixing device, all heat sources are turned off from the viewpoint of energy saving during the standby period when image formation is not performed, and a warm-up time (starting preparation time) is set when image formation is started. , image formation starts after the fixing member is sufficiently heated from turning off the heat source to the fixing temperature at which failure of fixing will not occur.

Afterwards, when the fixing temperature is started, the temperature reference determined to be capable of fixing is used when the temperature of the fixing member reaches the set temperature, and the warm-up time is determined based on the temperature reference. As shown by the solid line a in FIG. 18 , when the temperature of the fixing member reaches the set temperature T (for example, 180° C.) at the start of preparation, it is judged that fixing is possible, and the heat source is turned off.

However, since the temperature reference is sometimes shown in the 1-dot dashed line b of the time-temperature curve in Figure 18, and sometimes as shown in 2-dot dashed line c, the fluctuation of the preheating time in the L range causes great dissatisfaction among users. Therefore, the warm-up time should be determined, and when it reaches the specified time t (for example, 30 seconds) from the start of the warm-up, the time reference for judging whether it can be fixed is adopted, and it is described in the product manual as the specification of the product. It is "the standby time of this product is ×× seconds". Thus, by adopting the time reference, it is possible to achieve a level where there is no problem with fluctuations in the fixing temperature in general, while the warm-up time is fixed at a certain amount.

Patent Document 1: JP-A-2005-345989

Patent Document 2: Patent No. 3350315

Patent Document 3: JP-A-62-70886

Patent Document 4: JP-A-2004-240250

Contents of the invention

However, in such an image forming apparatus using a time reference, when the power of the heat source is insufficient due to a drop in input voltage or the like, as shown by the long dotted line d in FIG. Sometimes the temperature will be significantly lower than the set temperature T required for fixing. If it is judged that fixing is possible in this state, as shown in the short dotted line e in the figure, the temperature is lower than the lower limit temperature of fixing (for example, 135 °C) and poor fixing may occur.

Therefore, a first object of the present invention is to, in an image forming apparatus including a fixing control device that controls and uses a heat source to heat a fixing member of the fixing device, to preheat the fixing device on a time basis, usually on a time basis. While the time is fixed, when the temperature of the fixing unit may be lower than the set temperature, it prevents the failure of fixing due to insufficient power.

However, in such an image forming apparatus, when a peripheral machine such as a finishing unit driven by a power source of the same system or an automatic document feeder (ADF) is connected to the image forming apparatus main body, the fixing apparatus starts preparations at the same time. , It is necessary to perform initialization operations such as returning the operating parts to the initial position in these peripheral devices. Therefore, the proportion of electric power used in the initialization operation reduces the input electric power required for fixing, which may result in insufficient power of the heat source when the fixing device starts to prepare.

Therefore, the second object of the present invention is to prevent the failure of fixing due to the temperature of the fixing member being lower than the set temperature when the power of the heat source may be insufficient according to the connection status of the peripheral equipment.

The third object of the present invention is to make the warm-up time of the fixing device constant based on the time base usually with a simple structure, and at the same time, when the temperature of the fixing member may be lower than the set temperature, to prevent resulting in defective fixing.

A fourth object of the present invention is to determine whether or not the electric power supplied to the fixing device at the start of preparation is lower than a predetermined electric power with a simple configuration.

A fifth object of the present invention is to correctly determine whether the power supplied to the fixing device at the start of preparation is lower than the specified power, so as to prevent failure of fixing due to insufficient power of the heat source during paper passing.

The sixth object of the present invention is to control the waiting time of the time base step by step according to the power consumption of the connected peripheral equipment, expand the range of the time base, and basically eliminate the time deviation of the fixing device warm-up, Prevents defective fixing from occurring when the temperature of the fixing unit is lower than the set temperature.

The seventh object of the present invention is to prevent fixing failure due to insufficient power of the heat source during paper passing by setting the target temperature at a higher temperature based on the temperature reference when peripheral equipment uses a large amount of power.

However, when peripheral devices of the image forming apparatus are connected, an initialization operation is performed when the image forming apparatus starts preparation. Since this power reduces the power used for fixing, depending on the input voltage to the main body of the image forming apparatus, the necessary temperature may not be reached when the time reference is used, resulting in poor fixing.

Therefore, the eighth object of the present invention is to prevent the failure of fixing due to the temperature of the fixing member being lower than the set temperature when the power of the heat source may be insufficient according to the connection status of the peripheral equipment in consideration of the input voltage.

A ninth object of the present invention is to shorten the time until the warm-up of the fixing device starts without having to detect the connection status of the peripheral devices or the input voltage every time when the image forming apparatus starts to prepare.

However, when the non-operation time of the image forming apparatus passes a predetermined time, or when the reading value of the environmental sensor fluctuates above a predetermined value, there may be a change in the toner density or a change in the timing of writing an image. In order to maintain To obtain a high-quality image, it is generally necessary to perform image adjustment operations such as image density adjustment or color deviation correction for each imaging station at the start of the operation.

Therefore, a tenth object of the present invention is to prevent the failure of fixing due to the temperature of the fixing member being lower than the set temperature when there is a possibility that the power of the heat source may be insufficient depending on the image adjustment operation status.

The eleventh object of the present invention is to perform more detailed control, and according to the connection status of the peripheral equipment or the image adjustment operation status, when the power of the heat source may be insufficient, it can prevent the temperature of the fixing member from falling below the set temperature. poor fixing.

A twelfth object of the present invention is to prevent the failure of fixing due to the temperature of the fixing member being lower than the set temperature when the power of the heat source may be insufficient due to the low voltage value of the commercial power supply.

The thirteenth object of the present invention is that, in an image forming apparatus including a fixing control device which controls and uses a heat source to heat a fixing member of the fixing device, it is usually based on a time basis, when the warm-up time of the fixing device is set to At the same time, when the temperature of the fixing unit is likely to be lower than the set temperature, a warm-up time control method is provided to prevent poor fixing due to insufficient power.

As described above, the technical solution 1 of the present invention is to achieve the above-mentioned first object, which provides an image forming apparatus including a copier, a printer, a facsimile machine, etc. or belt-shaped fixing member, and the drum-shaped, belt-shaped, spacer-shaped and other pressing members that are pressed against this, by using recording materials such as paper and resin film, the adjustment on the recording material The toner is fixed to the recording material after being heated and pressurized, and it is characterized in that it includes: a fixing control device, when the power supplied to the fixing device at the beginning of preparation is lower than the required power, for example, the power supplied to the fixing device When the power drops by 10% from the normal 1200W to below 1080W, the time basis for judging that the fixing device can be fixed is determined from the time from the start of preparation to the time when the specified time is reached, and is switched to the time when the temperature of the fixing member reaches The temperature at which the fixing device can be fixed is judged at a time when the temperature is specified.

The technical solution 2 of the present invention is to achieve the above-mentioned second object. According to the image forming apparatus described in the technical solution 1, it is characterized in that: the fixing control device is based on the connection status of peripheral devices connected to the main body of the image forming apparatus. , to determine whether the power supplied to the fixing device at the start of the preparation is lower than the required power.

The technical solution 3 of the present invention is to achieve the above-mentioned third object. According to the image forming device according to the technical solution 2, the fixing control device includes: a peripheral equipment detection device, which monitors the connection status of the peripheral equipment. performing detection; a temperature/time reference switching device, which switches the fixing device to the temperature reference or time reference according to the detection result.

The technical solution 4 of the present invention is to achieve the above-mentioned fourth object. According to the image forming device according to the technical solution 2 or 3, it is characterized in that: the connection status of the peripheral equipment is based on the It is determined by the type or quantity of peripheral machines.

The technical solution 5 of the present invention is to achieve the above-mentioned fifth object. According to the image forming device according to the technical solution 2 or 3, it is characterized in that: the connection status of the peripheral equipment is based on the It is determined by the total value of power consumption of peripheral devices.

The technical solution 6 of the present invention is to achieve the above-mentioned sixth object. The image forming device according to any one of the technical solutions 2 to 5 is characterized in that: A connection condition, the prescribed time of the time reference is controlled by the fixing control device.

The technical solution 7 of the present invention is to achieve the above-mentioned 7th object. The image forming device according to any one of the technical solutions 2 to 5 is characterized in that: A connection condition, the prescribed temperature of the temperature reference is controlled by the fixing control device.

The technical solution 8 of the present invention is to achieve the above-mentioned 8th object. According to the image forming apparatus according to any one of the technical solutions 2 to 7, it is characterized in that: the fixing control device is connected to the main body of the image forming apparatus It judges whether the power supplied to the fixing device at the start of preparation is lower than the required power based on the connection status of the peripheral devices in the image forming device, and at the same time, judges based on the information of the input voltage to the main body of the image forming device.

The technical solution 9 of the present invention is to achieve the above-mentioned ninth object. The image forming apparatus according to the technical solution 8 is characterized in that it includes: a memory device, which simultaneously memorizes that the main power of the image forming apparatus body is turned on (ON). ) information on the connection status of the connected peripheral devices and the input voltage.

The technical solution 10 of the present invention is to achieve the above-mentioned tenth object. According to the image forming apparatus described in the technical solution 1, the fixing control device is characterized in that: The image adjustment operation status of color deviation correction is used to determine whether the power supplied to the fixing device at the start of preparation is lower than the required power.

Claim 11 of the present invention is to achieve the above-mentioned third object. The image forming apparatus according to claim 10 is characterized in that the fixing control device includes: a controller that monitors the image adjustment operation status at the start of preparation. detection; a temperature/time reference switching device, which switches the fixing device to the temperature reference or time reference according to the detection result.

A twelfth aspect of the present invention is to achieve the above fourth object. According to the image forming apparatus according to the tenth or eleventh aspect, the image adjustment operation status of the peripheral equipment is based on the type of the image adjustment operation. , times, and time.

The technical solution 13 of the present invention is to achieve the above-mentioned 11th object. According to the image forming apparatus according to the technical solution 2, it is characterized in that: the fixing control device According to the situation, it is judged whether the power supplied to the fixing device is lower than the required power when the preparation is started, and at the same time, it is also judged according to the image adjustment operation status when the preparation is started.

A 14th aspect of the present invention is to achieve the above-mentioned twelfth object. According to the image forming apparatus according to the 1st aspect, the fixing control device judges the power source to be supplied to the fixing device at the start of preparation based on the voltage value of the commercial power supply. Whether the power in the device is lower than required.

The technical solution 15 of the present invention is to achieve the above-mentioned thirteenth object, which provides a warm-up time control method in an image forming apparatus including a fixing Between the fixing member and the drum-shaped, tire-shaped, spacer-shaped pressing member that is in pressure contact with this, the toner on the recording material is heated and applied by using a recording material such as paper or resin film. After pressing and fixing to the recording material, it is characterized in that when the power supplied to the fixing device at the start of preparation is lower than the required power, the fixing is judged from the time from the start of preparation to the arrival of the specified time. The time reference that the device can be fixed is switched to the temperature reference when the temperature of the fixing device can be fixed is determined by the time when the temperature of the fixing member reaches a predetermined temperature.

According to technical solution 1, when the power supplied to the fixing device at the time of starting preparation is lower than the necessary power, since the fixing control device is provided to switch from the time reference to the temperature reference, it eliminates the usual time reference. After setting the warm-up time of the fixing device to a certain value, while the deviation of the warm-up time may cause user dissatisfaction, when the temperature of the fixing unit may be lower than the set temperature, by switching to the temperature reference, it is possible to prevent power shortage. Instead, fixing failure occurs.

According to the technical solution 2, since the fixing control device judges whether the power supplied to the fixing device starting to prepare is lower than the necessary power based on the connection status of the peripheral devices connected to the image forming device body, due to the connection status of the peripheral devices connected The proportion of power used for initializing the operation will reduce the input power required for fixing. When there is a possibility that the power of the heat source will be insufficient due to this, the mode of setting the warm-up time, that is, the user's waiting time, to a certain value will be abandoned, and the temperature of the fixing unit will be used instead. When the set temperature required for fixing is reached, it is judged as the temperature standard for fixing, so that fixing failure caused by the temperature of the fixing member being lower than the set temperature can be prevented.

According to technical solution 3, because the peripheral machine detection device that detects the connection status of the peripheral machine is set in the fixing control device, and the temperature/time reference switching device that switches the fixing device to the temperature reference or the time reference according to the detection result, in With a simple configuration, the warm-up time of the fixing device is kept constant on the basis of a normal time basis, and when the temperature of the fixing member is likely to be lower than the set temperature, it is possible to prevent failure of fixing due to insufficient power.

According to technical solution 4, since the connection status of peripheral devices is determined according to the type or quantity of peripheral devices connected to the main body of the image forming apparatus, after roughly judging the types and quantities of peripheral devices connected to the main body of the image forming apparatus, pass With a simple configuration, it can be judged whether or not the electric power supplied to the fixing device at the start of preparation is lower than the predetermined electric power.

According to claim 5, since the connection status of peripheral devices is determined based on the total value of power consumption of peripheral devices connected to the main body of the image forming apparatus, it is possible to correctly determine whether the power supplied to the fixing device at the start of preparation is It will be lower than the specified power. When the power of the peripheral equipment is large, it will operate after setting the target temperature at a higher temperature based on the temperature, so as to prevent the fusing failure caused by the insufficient power of the heat source in the paper passing. .

According to technical solution 6, corresponding to the connection status of peripheral devices connected to the image forming apparatus body, the fixed time of the time reference is controlled by the fixing control device, for example, the time reference 1 is when the total power used by the peripheral devices is less than X1, If it is more than X1 and less than X2, it is time base 2 whose setting time is longer than time base 1. When the power is more than X2, it operates with temperature base. In this way, after controlling the waiting time in stages according to the power consumption of the connected peripheral equipment, the range of the time base is expanded, and the deviation of the warm-up time of the fixing device can be basically eliminated. Fixing failure occurs when the temperature of the fixing unit is lower than the set temperature.

According to technical solution 7, since it corresponds to the connection status of the peripheral devices connected to the image forming apparatus body, the fixed temperature is controlled by the fixing control device, and when the total power used by the peripheral devices is less than X1 as the time reference, When it is more than X1 and less than X2, it is used as the temperature reference 1 with the first target temperature set. When the power is above X2, it operates with the temperature reference 2 with the second target temperature higher than the first target temperature. According to the use of peripheral machines, set the temperature before paper passing to a high position, and compensate for the temperature drop when the power is insufficient due to the action of peripheral machines during paper passing. Therefore, when the power usage of the peripheral equipment is large, the temperature reference is used and the target temperature is set at a higher temperature before operation, so that fixing failure due to insufficient power of the heat source during paper passing can be prevented.

According to claim 8, since the fixing control device determines whether the power supplied to the fixing device at the start of preparation is lower than the necessary power, it is judged based on the connection status of peripheral devices connected to the main body of the image forming device, and also based on Judging based on the information of the input voltage input to the main body of the image forming equipment, when the proportion of power used by the connected peripheral equipment due to the initialization operation reduces the necessary input power, and the power of the heat source may be insufficient even after taking into account the input voltage. , give up the mode of making the warm-up time, that is, the user's waiting time, constant, and instead use the temperature reference that can be judged to be fixed when the temperature of the fixing part reaches the set temperature required for fixing, so as to prevent the temperature of the fixing part from being low. Failure to fix at the set temperature.

According to technical proposal 9, since the connection state of the connected peripheral equipment and the information of the input voltage are stored simultaneously when the main power supply of the image forming apparatus body is turned on (ON), the memory device is not necessary to start the preparation process of the image forming apparatus. Each time, the connection status of the peripheral equipment or the input voltage of the image forming apparatus body is detected, and the time until the warm-up of the fixing apparatus starts can be shortened by eliminating the detection time.

According to technical solution 10, since the fixing control device judges whether the power supplied to the fixing device is lower than the necessary power according to the image adjustment operation status at the start of preparation, when the power used for the image adjustment operation reduces the input power necessary for fixing , and when the power of the heat source may be insufficient, the mode of making the warm-up time, that is, the user's waiting time, a certain amount is abandoned, and the temperature reference that can be judged to be fixed after the temperature of the fixing part reaches the necessary set temperature is used instead, so as to prevent fixing Fusing failure occurs when the temperature of the part is lower than the set temperature.

According to technical solution 11, since the fixing control device includes a controller for detecting the state of the image adjustment action at the start of preparation, and a temperature/time reference switching device for switching the fixing device to a temperature reference or a time reference according to the detection result, With a simple structure, the warm-up time of the fixing device is usually fixed on a time basis, and at the same time, when the temperature of the fixing member is likely to be lower than the set temperature, it is possible to prevent the failure of fixing due to insufficient power. .

According to technical solution 12, since the image adjustment operation status of the peripheral equipment is determined according to the type, frequency and time of the image adjustment operation, it can be judged from the simple type, frequency and time of the image adjustment operation through a simple configuration. It is judged whether the power supplied to the fixing device at the start of preparation may be lower than the specified power.

According to claim 13, since the fixing control device judges whether the electric power supplied to the fixing device at the start of preparation is lower than necessary based on the connection status of the peripheral equipment connected to the main body of the image forming device and the image adjustment operation status at the start of preparation. If the electric power is used, it is possible to carry out more detailed control. When the electric power used for the initializing operation of the peripheral equipment and the electric power used for the image adjustment operation reduce the input power necessary for fixing, and the power of the heat source may be insufficient, the preheating operation will be abandoned. Time is the mode in which the user waits for a certain amount of time. Instead, the temperature reference for determining the possibility of fixing can be determined when the temperature of the fixing component reaches the set temperature necessary for fixing, so as to prevent the occurrence of problems caused by the temperature of the fixing component being lower than the set temperature. poor fixing.

According to technical solution 14, since the fixing control device judges whether the power supplied to the fixing device at the start of preparation is lower than the necessary power according to the voltage value of the commercial power supply, the power of the heat source may be insufficient when the voltage value of the commercial power supply is low. In this case, the mode of setting the warm-up time, that is, the waiting time of the user, as constant is abandoned, and the temperature reference for judging that the fixing is possible is determined when the temperature of the fixing member reaches the set temperature necessary for fixing, so as to prevent the temperature of the fixing member from Fusing failure caused by lower than the set temperature.

According to claim 15, in the image forming apparatus, when the electric power supplied to the fixing device at the start of the preparation is lower than the necessary power, since it is possible to determine whether the fixing device can fix from the time when the preparation is started until the predetermined time is reached. The benchmark, switch to the temperature benchmark that judges whether the fixing device can be fixed by the time when the temperature of the fixing component reaches the specified temperature. Usually, the warm-up time of the fixing device is fixed based on the time reference. At the same time, When the temperature of the fixing member is likely to be lower than the set temperature, it is possible to provide a warm-up time control method that prevents poor fixing from being caused thereby.

Description of drawings

A complete description of the disclosed technology and its features can be more quickly and better understood with reference to the following detailed description of the accompanying drawings. in,

FIG. 1 is an overall schematic configuration diagram of a tandem color copier as an example of image forming equipment and its internal mechanism.

FIG. 2 is a schematic configuration diagram of a fixing device included in the main body of the copier in FIG. 1 and a fixing control device thereof.

FIG. 3 is a time-temperature graph of the fixing device.

FIG. 4 is an example flowchart of the method for controlling the warm-up time of the fixing device.

FIG. 5 is a flow chart of another method for controlling the warm-up time of the fixing device.

FIG. 6 is a flowchart of another example of the method for controlling the warm-up time of the fixing device.

FIG. 7 is a flowchart of yet another example of the method for controlling the warm-up time of the fixing device.

FIG. 8 is a schematic configuration diagram showing another example of a fixing device included in the main body of the copier in FIG. 1 and a fixing control device thereof.

FIG. 9 is a flowchart of yet another example of the method for controlling the warm-up time of the fixing device.

FIG. 10 is a flow chart of still another example of the method for controlling the warm-up time of the fixing device.

FIG. 11 is a schematic configuration diagram of yet another example of a fixing device included in the main body of the copier in FIG. 1 and a fixing control device thereof.

FIG. 12 is a flow chart of still another example of the method for controlling the warm-up time of the fixing device.

FIG. 13 is another schematic configuration diagram of the fixing device included in the main body of the copier in FIG. 1 and its fixing control device.

FIG. 14 is a flowchart of still another example of the method for controlling the warm-up time of the fixing device.

FIG. 15 is a flow chart of still another example of the method for controlling the warm-up time of the fixing device.

FIG. 16 is a flowchart of still another example of the method for controlling the warm-up time of the fixing device.

FIG. 17 is a schematic configuration diagram of a roller fixing device using an IH coil.

Fig. 18 is a time-temperature graph of a fixing device in the prior art.

Detailed ways

Hereinafter, examples of the best mode for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is an overall schematic configuration diagram of a tandem color copier and its internal mechanism as an example of an image forming apparatus.

In the figure, 100 denotes a copier body of the image forming apparatus body, 200 denotes an image reading device mounted on the copier body 100, 300 denotes an automatic document feeder (ADF) installed thereon, and 400 denotes a copier mounted on the copier body 100- A duplex unit in the side, 500 represents a completed unit installed in the other side of the copier body 100 .

In the copier main body 100, four image forming units 10c, 10m, 10y, and 10b of cyan, magenta, yellow, and black are arranged side by side in series. In each imaging unit, corresponding drum-shaped photoreceptors 11c, 11m, 11y, and 11b are provided.

Then, as each photoreceptor 11c, 11m, 11y, 11b rotates in the clockwise direction in the figure, firstly, at each charging device 12c, 12m, 12y, 12b composed of a charging roller, etc., a bias voltage is applied thereto. The surface is uniformly charged. Next, image reading device 200 performs writing by irradiating laser beams Lc, Lm, Ly, and Lb from common writing device 13 based on the read signals, so that the photoreceptors 11c, 11m, 11y, and 11b An electrostatic latent image is formed.

Instead of using a writing device that performs writing using laser light, writing may be performed using a writing device that is constituted by an LED array or the like. Thereafter, at the respective developing devices 14c, 14m, 14y, and 14b, the electrostatic latent image is visualized by attaching the powdered toner to form respective monochrome images on the photoreceptors 11c, 11m, 11y, and 11b.

Also, the intermediate transfer body 15 of the endless belt in contact with the photoreceptors 11c, 11m, 11y, 11b moves counterclockwise in the figure, passes through the respective primary transfer devices 16c, 16m, 16y, 16b, and the photoreceptors The single-color images of each color on 11c, 11m, 11y, and 11b are transferred to the intermediate transfer body 15 in the order of cyan first, and the transferred images are superimposed to form a full-color image on the intermediate transfer body 15. image.

On the other hand, at an appropriate timing, one of the supply rollers 20 is selected and rotated, and the recording material P is sent out from the corresponding paper feeding cassette 21 in the copier body 100, and passes through the recording material conveying path 23 to meet a pair of rollers. Position roller 24 o'clock stop. Then, corresponding to the timing of the full-color image on the intermediate transfer body 15, after the pair of registration rollers 24 are rotated, at the secondary transfer position, the full-color image is secondary-transferred to the recording medium by the secondary transfer device 25. Material P on.

Among them, the recording material P after the transfer of the full-color image passes through the recording material conveying path 23, and then is conveyed upward. It is fixed into the recording material P, and then discharged by the discharge roller 26 and stacked on the discharge stacking device 27 of the copier 100 .

The photoreceptors 11c, 11m, 11y, and 11b after the primary transfer are cleaned by the primary cleaning devices 17c, 17m, 17y, and 17b to remove residual toner on the surface, thereby being initialized. In addition, the intermediate transfer body 15 after the secondary transfer is cleaned by the secondary cleaning device 18 to remove the residual toner on the surface, thereby being initialized.

In the figure, 28c, 28m, 28y, and 28b represent the toner tanks of the respective colors that are replenished with toner in the developing devices 14c, 14m, 14y, and 14b of the respective colors, using respective powder conveying devices (not shown).

Afterwards, when the photocopier shown in the figure records on the front and back of the recording material P, the recording material P with recording on one side passing through the fixing device 600 is switched by the switching claw not shown, and then the photocopying machine body 100 It is sent into the double-sided assembly 400, the front and back sides are reversed through the turning path (switch back) 93, and then sent into the copier body 100 through the paper feeding path 94, and the paper is fed to the secondary transfer position again. After transferring the image otherwise formed on the intermediate transfer body 15 on the back side to record the image, it is discharged to a paper discharge stacking device 27 by a discharge roller 26 .

In addition, the above is the description of the case of recording a color image in the recording material P. In the copier, the appropriate imaging components 10c, 10m, 10y, 10c, 10m, 10y, Some of 10b, so that a black image or a color image can be formed arbitrarily.

Further, as a peripheral device of the copier 100, a finishing unit 500 or ADF 300 that is connected to the copier main body 100 and operates based on supplied power and control signals may be provided. The finishing unit 500 is a device that performs post-processing after printing. It sorts and stacks the printed paper, and binds each predetermined number of pages into a booklet with staples. In addition, ADF 300 is a device that automatically conveys a copy document to image reading device 200 . As mentioned above, depending on the usage of the user, peripheral devices can be various, and sometimes they are connected and sometimes they are not connected.

However, in such an image forming apparatus, as shown in the figure, in the copying machine main body 100, when the peripheral equipment such as the finishing unit 500 or the ADF 300 driven by the power supply of the same system is connected, the preparation and fixing apparatus 600 At the same time, it is necessary to perform an initialization operation to return the operating parts in these peripheral devices to their original positions. Therefore, there is a possibility that the input power required for fixing may decrease due to the power used for the initializing operation, thereby causing a problem that the capacity of the heat source is insufficient when the fixing device 600 starts preparation.

FIG. 2 shows the fixing device 600 included in the copier body 100 of FIG. 1 and its fixing control device 700 .

In the fixing device 600, the endless fixing belt 30 of the fixing member is hung between the first roller 31 and the second roller 32, and the rotation of one roller enables the other roller to be driven to rotate. In addition, a heat source 33 for heating the fixing belt 30 is arranged around the first roller 31 , and a fixing nip N is formed between the second roller 32 and the pressure roller 40 via the fixing belt 30 . As the heat source 33 , an IH coil that heats the fixing belt 30 by electromagnetic induction is used in this example.

Then, when the image-transferred recording material P passes through the fixing nip N, the pressure roller 40 is pressed into the second roller 32 through the fixing belt 30, thereby applying pressure while the heat source 33 is heated. After the coil is energized, the fixing belt 30 is heated by electromagnetic induction, and the secondary transfer image is fixed by the heat of the heating fixing belt 30 .

The heat source 33 of the fixing device 600 is controlled by the fixing control device 700 . In the fixing control device 700, the IH control section 50 connected to the heat source 33 is provided. A frequency conversion circuit 51 is provided in the IH control unit 50 , and a fixing control unit 53 is connected thereto. In the fixing control part 53, a mode switching device 54 of a temperature/time reference switching device is provided, and a peripheral device detection device 55 is also connected. The peripheral equipment detecting device 55 detects whether or not peripheral equipment such as the completed module 500 or the ADF 300 is connected with an electric device.

When the mode switching device 54 starts to prepare the fixing temperature, according to the detection result of the peripheral equipment detecting device 55, when the temperature of the fixing belt 30 of the fixing unit reaches the set temperature, the temperature priority mode is judged as the temperature standard for fixing, Switches between the time priority mode based on the time base for judging that fixing is possible when a predetermined time elapses from the start of preparation.

The fixing control unit 53 is connected with a thermistor 56 for detecting the temperature of the fixing belt 30 of the fixing unit, an automatic manual switching device 58 for switching the heat source 33 of the fixing device 600 automatically or manually, and the like. In addition, the fixing control unit 53 and the IH control unit 50 are connected to a commercial power supply 52 .

Then, in the fixing control device 700 that controls and uses the heat source 33 to heat the fixing belt 30 of the fixing device 600, it is finally based on the time priority mode, considering that the power supplied to the fixing device 600 at the start of preparation may be When the power is lower than the specified power, when the time priority mode may cause fixing failure, the mode switching device 54 switches to the temperature priority mode.

Therefore, basically, the warm-up time of the fixing device 600 is made constant by adopting the time priority mode. On the other hand, according to the connection of the peripheral equipment, the power used for the initializing operation of the peripheral equipment reduces the input power required for fixing, as shown by the dashed dashed line d in Figure 18 at a certain warm-up time t , when the temperature of the fixing member is significantly lower than the set temperature T necessary for fixing, if the state is judged to be capable of fixing, it will be lower than the lower limit temperature of fixing as shown by the short dotted line e in the passage of paper (for example 135° C.) and fixation failure occurred.

In this way, when peripheral equipment is connected to the copier body 100, the power supplied to the fixing device 600 at the start of preparation may be lower than the specified power and the power of the heat source may be significantly insufficient, for example, when the power supplied to the fixing device 600 When the power from the usual 1200W may drop below 10% of 1080W, the mode of making the user wait for a certain period of time is abandoned, and the temperature of the fixing belt 30 reaches the set temperature required for fixing before judging. The temperature priority mode of fixing can prevent the fixing failure caused by the temperature of the fixing belt 30 being lower than the set temperature T.

FIG. 3 shows a time-temperature curve of the fixing device 600 .

In the time priority mode, as shown by the solid line f in the figure, it is judged that the fixing is possible after the time from the start of the preparation to the predetermined time t1 (for example, 30 seconds). When peripheral devices are connected and the temperature priority mode is switched by the fixing control device 700, as shown by the long dotted line g in the figure, when the temperature of the fixing belt 30 reaches the set temperature T (for example, 180° C.), it is judged for fixation.

In addition, when the time priority mode is used, for example, when the temperature of the fixing belt 30 is high after a short time since the last fixing, the temperature of the fixing belt 30 reaches the set temperature before a certain user waiting time is reached. And in fact, when the fixing is possible, there is no need for the user to wait. In this case, the temperature priority mode is adopted instead of the mode that makes the user wait for a certain time, so as not to spend too much time in the preparation.

FIG. 4 is an example flow chart of the method for controlling the warm-up time of the fixing device 600 .

In the control method shown in FIG. 4 , it is judged whether the fixing temperature is above a predetermined temperature (for example, 50° C.), and if it is above the predetermined temperature, it switches to the temperature priority mode. If it is not satisfied with the specified temperature, the peripheral machine detection device 55 is used to detect whether the completed assembly 500 or ADF300 is connected, and according to the detection result, the mode switching device 54 is used to switch the mode. When no peripheral machine is connected, the time priority mode is adopted. , when connected with peripheral devices, the temperature priority mode is adopted.

In the fixing control device 700 of this example, the connection status of peripheral devices is determined based on whether peripheral devices are connected to the copier main body 100, so that it is judged whether the power supplied to the fixing device 600 at the start of preparation is lower than the specified power or not. It may be that the connection status of peripheral devices is determined based on what kind of peripheral devices are connected to the copier body 100, or how many peripheral devices are connected to the copier body 100, so as to determine whether the peripheral devices are supplied to the fixing device 600 at the time of preparation. Whether the power in the battery is lower than the specified power.

It is also possible to calculate the required power of the connected peripheral devices from a peripheral device ID table (not shown) prepared in advance when the connected peripheral devices require little power for operation, and The connection status of the peripheral devices is judged based on the sum of the power consumption of the peripheral devices connected to the copier main body 100 .

FIG. 5 is a flow chart of another warm-up time control method for such a fixing device 600 .

In the control method shown in FIG. 5 , it is judged whether the tire temperature is above a predetermined temperature (for example, 50° C.), and if it is above the predetermined temperature, it is switched to the temperature priority mode. If dissatisfied with the specified temperature, judge whether it is above the specified power X watts. If it is above this, switch to the temperature priority mode. If not, execute the time priority mode to save the user from unnecessary necessary waiting time. Furthermore, when the power usage of the peripheral equipment is high, the temperature priority mode is executed to prevent fixing failure due to insufficient power of the heat source.

FIG. 6 shows another flow example of the method for controlling the warm-up time of the fixing device 600 .

The electric power of the connected peripheral devices differs depending on the type, and the necessary electric power is calculated from a peripheral device ID table not shown in the figure prepared in advance, and as shown in FIG. For example, if it is above 50° C., if it is above the specified temperature, it will switch to the temperature priority mode. If it is less than the specified temperature, it is judged whether the total power used by the peripheral equipment reaches X1, and if it is less than X1, time priority mode 1 is executed. In addition, if it is above X1 and below X2, time priority mode 2 is executed. Time priority mode 2 sets a longer time than time priority mode 1. When the power is above X2, the temperature priority mode is executed. In this way, according to the connection status of the peripheral devices connected to the copier body 100, the fixed time of the time priority mode is controlled by the fixing control device 700, and the waiting time of the two stages of the number and type of the connected peripheral devices can be clearly displayed. , thus saving unnecessary waiting time.

Taking FIG. 3 as an example to illustrate, the prescribed time in the time priority mode 1 is t1, and the prescribed time in the time priority mode 2 is t2 which is longer than t1. Thus, the waiting time of the time base is controlled in stages according to the power consumption of the connected peripheral equipment, the range of the time base is increased, and the fluctuation of the warm-up time of the fixing device 600 is basically eliminated, as shown in FIG. 3 As shown by the short dotted line h in , it is possible to prevent the occurrence of defective fixing when the temperature of the fixing belt 30 is lower than the set temperature T. FIG.

FIG. 7 is another flow example of the method for controlling the warm-up time of the fixing device 600 .

It judges the connection status of the peripheral devices, and when switching between the time priority mode and the temperature priority mode, it calculates the power required by the connected peripheral devices according to the peripheral device ID table not shown in the figure, as shown in the figure As shown in 7, first judge whether the tire temperature is above the specified temperature (for example, 50°C), if not, then judge whether the total power used by the peripheral equipment reaches X1, if not, execute time priority mode 1 . In addition, if it is above X1 and below X2, the temperature priority mode 1 in which the first target temperature is set is executed. Also, when the electric power is equal to or greater than X2, the temperature priority mode 2 in which the second target temperature is set is executed.

The second target temperature is higher than the first target temperature. According to the power used by the peripheral machines, the temperature before the paper passing is set higher. When the power is insufficient due to the action of the peripheral machines during the paper passing, it is used to supplement the temperature drop. part. In this way, according to the connection status of the peripheral devices connected to the copier body 100, the fixed temperature in the temperature priority mode is controlled by the fixing control device 700. The temperature is set at a high temperature to operate, so it is possible to prevent fixing failures due to insufficient power of the heat source 33 during paper passing.

FIG. 8 is another example of the fixing device 600 and its fixing control device 700 included in the copier body 100 shown in FIG. 1 .

In this example, a controller 70 for detecting the image adjustment operation status at the start of preparation is provided instead of the peripheral device detection device 55 shown in FIG. 2 . The other configurations are the same as in FIG. 2 , so corresponding parts are given the same reference numerals as in FIG. 2 , and redundant explanations are omitted.

The copier body 100 includes an unillustrated clock for counting non-operation time, and an unillustrated environment sensor for detecting temperature and humidity. Through the controller 70, when the non-action time exceeds the specified time, or when the reading value of the environmental sensor changes above the specified value, the image density adjustment is performed when the preparation operation is started, or each imaging station 10c, 10m, and 10y , 10b color deviation to perform image adjustment operations. By performing the image adjustment operation, it is possible to maintain the image quality and obtain a high-quality image.

Therefore, basically, the warm-up time of the fixing device 600 is made constant by adopting the time priority mode. On the other hand, depending on the state of the image adjustment operation at the start of preparation, the share of power used in the image adjustment operation will reduce the input power required for fixing. Therefore, when there is a high possibility of insufficient power, the mode in which the user waits for a certain period of time is abandoned, and the temperature priority mode that can be fixed is determined after the temperature of the fixing belt 30 reaches the set temperature required for fixing. Fixing failures that occur when the temperature of the fixing belt 30 is lower than a set temperature are prevented.

Also, as in the previous example, after adopting the time priority mode, for example, when the elapsed time from the previous fixing is not long and the temperature of the fixing belt 30 is still at a high temperature, the temperature of the fixing belt 30 reaches the high temperature before reaching a certain user waiting time. Set the temperature, and it is actually possible to fix. In order to prevent the user from waiting unnecessarily, we abandon the practice of strictly adhering to the user's waiting time at this time, and instead adopt the temperature priority mode, so as not to worry too much in the start preparation. Take unnecessary time.

FIG. 9 is a flow chart of still another example of the method for controlling the warm-up time of the fixing device 600 .

In the control method shown in FIG. 9 , it is also judged whether the tire temperature is above a predetermined temperature (for example, 50° C.), and if it is lower than the predetermined temperature, the controller 70 detects the presence or absence of an image adjustment operation, and then As a result of this detection, the mode switching is performed by the mode switching device 54. When there is no image adjustment operation, the time priority mode is adopted. In addition, when the image adjustment operation is performed, the power supplied to the fixing device at the start of preparation may be considered. The power is lower than the specified power, so the temperature priority mode is adopted.

By switching to the temperature priority mode, even if the power of the heat source 33 is insufficient due to an image adjustment operation that reduces the power supplied to the fixing, the temperature of the fixing belt 30 will not be lower than the lower limit temperature for fixing. Fusing failure occurs.

Image adjustment operations include image density adjustment and color deviation correction. The timing, frequency, and operation time of image adjustment operations vary according to the non-operation time of the copier body 100 or changes in environmental conditions read by the environmental sensor. At this time, the image adjustment operation status of the peripheral equipment connected to the image forming apparatus body is determined according to the type, frequency, or time of the image adjustment operation. That's it.

FIG. 10 is yet another flowchart example of the method for controlling the warm-up time of the fixing device 600 .

As shown in Figure 10, similarly, it is first judged whether the tire temperature is above the specified temperature (for example, 50°C), and if it is lower than the specified temperature, it is switched between the time priority mode and the temperature priority mode according to the number of image adjustment operations. .

That is, the number of image adjustment actions is detected by the controller 70, and the mode switching is performed by the mode switching device 54 according to the detection result. When the number of image adjustment actions is lower than the specified time, the time priority mode is adopted. In addition, when the image When the number of adjustments is greater than specified, the temperature priority mode is used.

In this way, by switching to the temperature priority mode, even if the power of the heat source 33 is insufficient due to the image adjustment operation reducing the power supplied to the fixing, the temperature of the fixing belt 30 will not fall below the fixing lower limit temperature necessary for fixing. Prevents the occurrence of poor fixing.

FIG. 11 shows yet another example of the fixing device 600 and the fixing control device 700 included in the copier body 100 in FIG. 1 .

In this example, in addition to the peripheral device detection device 55 shown in FIG. 2 , a controller 70 connected to the fixing control unit 53 and detecting the state of the image adjustment operation at the start of preparation is provided. Since the configuration of other parts is the same as that in FIG. 2 , the same symbols as in FIG. 2 are attached to the corresponding parts, and the overlapping description thereof will be omitted.

Then, the fixing control device 700 judges whether the electric power supplied to the fixing device 600 at the start of the preparation is lower than the prescribed power based on the connection status of the peripheral devices connected to the copier body 100, and adjusts the image according to the image adjustment at the start of the preparation. Action status to judge. Thus, more detailed control can be performed, and even if the power of the heat source 33 is insufficient due to a decrease in the power supplied to the fixing, the temperature of the fixing belt 30 will not fall below the fixing lower limit temperature required for fixing, thereby preventing defective fixing. happened.

FIG. 12 is a flow chart of still another example of the method for controlling the warm-up time of the fixing device 600 .

In the control method shown in FIG. 12 , it is first judged whether the tire temperature is above a predetermined temperature (for example, 50° C.), and if it is above the predetermined temperature, it is switched to the temperature priority mode. If the temperature is lower than the specified temperature, it is detected by the peripheral equipment detection device 55 whether the completion unit 500 or the ADF 300 is connected, and the mode switching is performed by the mode switching device 54 according to the detection result. When there is no peripheral machine connected, it is detected whether there is an image adjustment action in the next step, and the mode switching is carried out by the mode switching device 54 according to the detection result. , use temperature priority mode.

Here, in the above-mentioned example, the fixing control device 700 judges whether the power supplied to the fixing device 600 at the start of preparation is lower than the specified power based on the connection status of the peripheral devices connected to the copier body 100, or determines whether the electric power supplied to the fixing device 600 at the start of preparation is It can be determined based on the image adjustment operation status, and others can also be determined based on, for example, the voltage value of the commercial power supply 52 .

Afterwards, the fixing control device 700 judges according to the voltage value of the commercial power supply 52 whether the electric power supplied to the fixing device 600 is lower than the specified power at the start of preparation, and if the voltage value of the commercial power supply 52 is low, the power of the heat source may be insufficient. In this case, the practice of making the warm-up time, that is, the user’s waiting time constant, is given up, and when the temperature of the fixing belt 30 reaches the set temperature T required for fixing, it is judged as a temperature reference that can be fixed, thereby preventing the temperature of the fixing belt 30 from being fixed. Fixing failure occurs when the temperature is lower than the set temperature.

FIG. 13 shows another example of the fixing device 600 and its fixing control device 700 included in the copier body 100 in FIG. 1 .

The endless fixing belt 30 of the fixing unit in the fixing device 600 is wound between the first roller 31 and the second roller 32 , and the rotation of one roller enables the rotation of the other roller to move drivenly. In addition, a heat source 33 for heating the fixing belt 30 is arranged around the first roller 31 , and a fixing nip N that is pressed into the pressure roller 40 through the fixing belt 30 is formed on the second roller 32 . As the heat source 33 , an IH coil that heats the fixing belt 30 by electromagnetic induction is used in this example.

Then, when the image-transferred recording material P passes through the fixing nip N, while applying pressure by pressing the pressure roller 40 into the second roller 32 through the fixing belt 30, the IH coil of the heat source 33 After energization, the fixing belt 30 generates heat due to electromagnetic induction, and after the heat is applied by the heating fixing belt 30, the secondary transfer image is fixed.

The heat source 33 of the fixing device 600 is controlled by the fixing control device 700 . In the fixing control device 700, the IH control section 50 connected to the heat source 33 is provided. A frequency conversion circuit 51 and an input voltage detection device 60 are provided in the IH control section 50 , and are connected to a fixing control section 53 . A mode switching device 54 of a temperature/time reference switching device and a memory device 61 are provided in the fixing control section 53 , which are connected to the peripheral device detection device 55 . The peripheral equipment detecting device 55 detects whether or not peripheral equipment such as the completed unit 500 or the ADF 300 is connected by an electrical device.

When the mode switching device 54 starts to prepare for the fixing temperature, when the temperature of the fixing belt 30 of the fixing member reaches the set temperature, it switches to the temperature priority mode which is judged to be a temperature standard for fixing. When the time is out, switch to the time priority mode that judges the time base that can be fixed.

In the fixing control section 53, a thermistor 56 and the like for detecting the temperature of the fixing belt 30 of the fixing member are connected. Further, the fixing control unit 53 and the IH control unit 50 are connected to a commercial power supply 52 .

Then, in the fixing control device 700 that uses the heat source 33 to heat the fixing belt 30 of the fixing device 600, it is generally based on the time priority mode, and considering that the power supplied to the fixing device 600 at the start of preparation may be lower than In the time priority mode, if there is a possibility of fixing failure, the power is switched to the temperature priority mode by the switching device 54 .

FIG. 14 is a flow chart of still another example of the method for controlling the warm-up time of the fixing device 600 .

In the control method shown in FIG. 14 , the power used for initializing the peripheral equipment is calculated based on the information of the peripheral equipment detected by the peripheral equipment detection device 55, and further compared with the voltage detected by the input voltage detection device 60. Values are merged, and when the value is below the specified value, it will switch to the temperature priority mode.

Therefore, basically, the warm-up time of the fixing device 600 is made constant by adopting the time priority mode. On the other hand, depending on the connection status of the peripheral equipment, when the required power for fixing is lowered due to the share of power used for the initialization of the peripheral equipment, or the input voltage value is lower than a specified value, etc., it is judged that the heat source 33 is significantly When the power is insufficient, it switches from the time-priority mode in which the user waits for a certain amount of time to the temperature-priority mode. By raising the temperature of the fixing belt 30 to the necessary temperature, the temperature drop during paper passing is suppressed, and the occurrence of fixing failures is prevented. .

FIG. 15 is a flowchart of still another example of the method for controlling the warm-up time of the fixing device 600 .

In this example, the connection information of the peripheral equipment or the information of the input voltage is reset once by the sleep mode of the image forming apparatus, etc., and each detection or input of the connected peripheral equipment is reset when the preparation is started. The detection of the voltage, and the connection information of the peripheral equipment or the information of the input voltage when the main power supply is ON are stored in the memory device 61 . Thus, no detection is required when returning from the sleep mode, and by switching to the time-priority mode or the temperature-priority mode based on information from the memory device 61, the required time can be shortened and the warm-up time can be shortened.

FIG. 16 is a flowchart of still another example of the method for controlling the warm-up time of the fixing device 600 .

In this example, for example, when the temperature of the fixing belt 30 is not lower than a predetermined temperature (for example, 60° C.) after a short time has elapsed since the previous fixing operation, it is judged from the connection information of the peripheral equipment and the information of the input voltage. When the required fixing temperature is reached in a shorter time than the time set in the time priority mode, switch to the temperature priority mode. Accordingly, it is possible to shorten the preparation time for starting the fixing.

In the above example, the belt fixing device using the IH coil as the heat source 33 is taken as an example to illustrate, the fixing member is not limited to the fixing belt 30, as shown in FIG. The metal layer 64 is provided near the surface layer, and the roller-type IH coil using a roller-type IH coil that heats the metal layer 64 by frequency conversion is not limited to a specific IH or belt fixing device.

Also, the pressure member pressed into the fixing unit is not limited to the pressure roller 40, and may be a pressure belt wrapped around a plurality of rollers, or a tire belt that does not apply tension, or Non-rotating, non-moving pressure pads, etc.

The heat \\ source can be arranged on the outside of the hanging part of the fixing belt 30, also can be the inside, can be built in and arranged in the first roller 31 that hangs the fixing belt 30, and can also be arranged in both sides. In addition, when the fixing member is a fixing roller, it may be built into the fixing roller. In addition, the pressurizing member may be configured to have another independent heat source.

The basis and priority claims of this patent application are Japanese Patent Application JP2007-333742 filed at the Japan Patent Office on December 26, 2007, and Japanese Patent Application JP2008-255917 filed at the Japan Patent Office on October 1, 2008 Its entire content is incorporated herein by reference.

Many modifications and variations are possible from what has been described above. That is, within the scope of the claims, the disclosure content of this patent specification is not limited to the above description.

Claims (15)

1. An image forming apparatus comprising a fixing device for heating toner on a recording material through a recording material between a heated fixing member and a pressing member in pressure contact therewith After being pressurized, it is fixed into the recording material, and it is characterized in that it includes: The fixing control device, when the electric power supplied to the fixing device at the start of the preparation is lower than the required power, judges the time when the fixing device can fix with the time from the start of the preparation to the predetermined time, and switches to Therefore, the temperature reference point at which the fixing device can be fixed is judged by the time when the temperature of the fixing member reaches a predetermined temperature. 2. The image forming apparatus according to claim 1, wherein: The fixing control device judges whether the power supplied to the fixing device at the start of preparation is lower than required power based on the connection status of peripheral devices connected to the image forming device body. 3. The image forming apparatus according to claim 2, wherein the fixing control apparatus comprises: Peripheral equipment detection device, which detects the connection status of the peripheral equipment; A temperature/time reference switching device, which switches the fixing device to the temperature reference or the time reference according to the detection result. 4. The image forming apparatus according to claim 2 or 3, characterized in that: The connection status of the peripheral devices is determined according to the type or number of peripheral devices connected to the image forming apparatus body. 5. The image forming apparatus according to claim 2 or 3, characterized in that: The connection status of the peripheral devices is determined based on a total value of power consumption of peripheral devices connected to the image forming apparatus main body. 6. The image forming apparatus according to any one of claims 2 to 5, characterized in that: The prescribed time of the time base is controlled by the fixing control device according to a connection status of peripheral devices connected in the image forming apparatus main body. 7. The image forming apparatus according to any one of claims 2 to 5, characterized in that: The prescribed temperature of the temperature reference is controlled by the fixing control device in accordance with connection conditions of peripheral devices connected in the image forming apparatus main body. 8. The image forming apparatus according to any one of claims 2 to 7, characterized in that: The fixing control device judges whether the power supplied to the fixing device at the start of preparation is lower than required power based on the connection status of the peripheral devices connected to the image forming device body, and at the same time, based on the It can be judged based on the information of the input voltage in the main body of the image forming apparatus described above. 9. The image forming apparatus according to claim 8, comprising: A memory device for simultaneously storing information on the connection status of the peripheral equipment connected when the main power of the image forming apparatus body is turned ON and the information on the input voltage. 10. The image forming apparatus according to claim 1, wherein: The fixing control device determines whether the power supplied to the fixing device at the start of the preparation is lower than the required power based on the image adjustment operation status at the start of the preparation. 11. The image forming apparatus according to claim 10, wherein the fixing control apparatus comprises: a controller, which detects the image adjustment action status when the preparation is started; A temperature/time reference switching device, which switches the fixing device to the temperature reference or the time reference according to the detection result. 12. The image forming apparatus according to claim 10 or 11, characterized in that: The image adjustment operation status of the peripheral device is determined based on the type, frequency and time of the image adjustment operation. 13. The image forming apparatus according to claim 2, wherein: The fixing control device judges whether the electric power supplied to the fixing device at the start of the preparation is lower than the required power based on the connection status of the peripheral devices connected to the image forming device body, and at the same time, based on the to judge the image adjustment action status. 14. The image forming apparatus according to claim 1, wherein: The fixing control device judges whether the power supplied to the fixing device at the start of preparation is lower than required power based on the voltage value of the commercial power supply. 15. A warm-up time control method in an image forming apparatus, the image forming apparatus comprising a fixing device that passes a recording material between a heated fixing member and a pressing member in pressure contact therewith, The toner on the recording material is fixed into the recording material after being heated and pressurized, and it is characterized in that: When the electric power supplied to the fixing device at the start of the preparation is lower than the required power, the fixing control device will judge the time reference of the time when the fixing device can fix from the time from the start of the preparation to the arrival of the specified time, and switch to, The temperature reference level at which the fixing device can be fixed is judged at the time when the temperature of the fixing member reaches a predetermined temperature.

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