JPH08185086A - Image forming device - Google Patents

Abstract

PURPOSE: To prevent an image surface and the rear surface of a transfer mate rial from being soiled by the toner. CONSTITUTION: The image forming device provided with the fixing roller 1 held in press contact with the transfer material on which the toner image is formed, for fixing by fusing the toner image on the transfer material, the heating means for heating the fixing roller 1, and the cleaning member feeding means (feeding shaft 5) for feeding the cleaning member (cleaning web 4) to wipe clean the toner stuck on the fixing roller 1, is equipped with the fixing roller temp. detection means (thermistor 3) for detecting the temp. of the fixing roller 1, and the operation determination means for performing the operation determination of the cleaning member feeding means and the operation determination of the fixing roller 1, based on the temp. detected by the fixing roller temp. detection means 3. Moreover, the device is provided with the heat control means for starting the heating of the fixing roller by the heating means, after the completion of the processing of the cleaning member feeding means and the fixing roller, based on the determination result of the operation determination means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus,
In particular, the present invention relates to an image forming apparatus that fuses a toner image formed on a transfer material with a fixing roller to form an image on the transfer material.

[0002]

2. Description of the Related Art It is known to use an electrostatic transfer process as one type of image forming means in an image forming apparatus. In this type of image forming apparatus, an electrostatic transfer process is performed on a transfer material such as paper. A fixing device is used to fix and fix the formed toner image on the transfer material.

This fixing device is provided with a fixing roller heated by a heater and a pressure roller which is brought into pressure contact with the fixing roller, and a toner image is electrostatically charged in a pressure nip portion formed by these rollers. There is a type of fixing the toner image on the transfer material by passing the formed transfer material. This type of fixing device has advantages such as high thermal efficiency, excellent safety, and miniaturization, and is widely put into practical use.

However, in this type of fixing device, since the toner image on the transfer material comes into direct contact with the fixing roller, a part of the toner adheres to the fixing roller during fixing, and this adhered toner arrives next. There is a case where a so-called offset phenomenon occurs that adheres to the surface and causes deterioration of image quality.

Therefore, in order to avoid the offset phenomenon, means such as forming the surface of the fixing roller with a material having a good releasability for toner, applying silicon oil, or the like has been adopted. However, since it is difficult to completely eliminate the offset phenomenon even if such means is adopted, a type of cleaning the toner adhering to the fixing roller has been proposed.

As one type of this cleaning means,
A cleaning web (a belt-shaped cleaning member) made of a non-woven fabric or the like is continuously brought into contact with a rotationally driven fixing roller, and the web is sequentially wound up, and the surface of the fixing roller is rubbed with the web while being wound up. There is something to clean.

The above-mentioned cleaning means has an excellent cleaning function because the fresh cleaning web surface that is successively fed is always in sliding contact with the fixing roller surface.
Further, in order to reduce the frequency of replacement of the cleaning web (reduction of running cost), even if the winding speed of the web is extremely slowed, the cleaning effect can be sufficiently exerted during normal copying.

[0008]

However, even if the cleaning means is adopted, inconvenience may occur in the following cases.

That is, if a jam occurs while the transfer material is passing through the fixing device (hereinafter referred to as a fixing jam), the operator stops the operation of the fixing device and opens the opening / closing door for jam processing. And remove the blocked transfer material. At this time, when the operator pulls out the transfer material causing the jam, the transfer material on which the unfixed toner adheres is rubbed by the fixing roller, and therefore a large amount of toner may adhere to the fixing roller. high.

Here, the fixing jam is not limited to the case where the jam occurs in the fixing device. For example, the jam occurs in the sheet feeding cassette, and the transfer material is a fixing roller and a pressure roller in the fixing device. Include cases such as being sandwiched by and. Therefore, if the transfer material is sandwiched between the fixing roller and the pressure roller, it is the fixing jam referred to in the present specification, and the nipping occurs for any reason such as jam, power failure, opening of the door cover of the apparatus, or the like. It doesn't matter whether you do it or not.

On the other hand, the temperature of the fixing roller before and after the jam processing changes as shown in FIG.

That is, as shown in FIG. 7, when a fixing jam occurs during the operation of the apparatus main body, the power supply of the apparatus main body is shut off for the fixing jam processing, and the temperature of the fixing roller decreases. After the fixing jam process, when the main body of the apparatus is turned on, the apparatus is restarted, and at the same time as this restart, the fixing heater is energized. When the temperature of the fixing roller rises soon, the fixing roller is driven.

If the temperature of the fixing roller is low during the jam processing, a large amount of unfixed toner may adhere to the fixing roller. The toner heated in this state is melted, and the molten toner is fused on the surface of the fixing roller.
The deposited toner cannot be completely removed by the cleaning means using the cleaning web. Therefore, an offset phenomenon may occur to stain the image surface of the subsequent transfer material, or the fused toner may be transferred to the pressure roller to stain the back surface of the subsequent transfer material.

Therefore, an object of the present invention is to provide an image forming apparatus in which the image surface and the back surface of a transfer material are prevented from being contaminated with toner.

[0015]

In order to achieve the above object, the invention according to claim 1 presses a transfer material on which a toner image is formed, melts the toner image and fixes it on the transfer material. A fixing roller and heating means for heating the fixing roller;
An image forming apparatus comprising: a cleaning member supply unit that supplies a cleaning member that wipes off the toner adhering to the fixing roller; a fixing roller temperature detecting unit that detects the temperature of the fixing roller; and a fixing roller temperature detecting unit. Based on the temperature detected by the means, operation determining means for determining the operation of the cleaning member supplying means and operation of the fixing roller, and the cleaning member supplying means and the fixing roller based on the result of the operation determining means. And a heating control means for controlling the processing so as to start heating of the fixing roller by the heating means.

According to a second aspect of the present invention, the operation determining unit determines whether or not the cleaning member is supplied from the cleaning member supply unit based on the temperature detected by the fixing roller temperature detecting unit, or cleaning. It is characterized in that it is determined whether to supply the member and rotationally drive the fixing roller.

According to a third aspect of the present invention, the transfer material on which the toner image is formed is brought into pressure contact with the fixing roller to melt and fix the toner image on the transfer material, and heating means for heating the fixing roller. And a cleaning member supply means for supplying a cleaning member for wiping off the toner adhering to the fixing roller, the time from when the image forming device is stopped during operation to when the device power is turned on again. Based on the operation determining means for determining the operation of the cleaning member supplying means and the fixing roller, and the processing by the cleaning member supplying means and the fixing roller based on the result of the operation determining means. And a heating control unit for controlling the heating unit to start heating of the fixing roller.

According to a fourth aspect of the present invention, the operation determining means causes the cleaning member supply means to remove the cleaning member based on the time from when the image forming apparatus is stopped during operation until the power is turned on again. Whether to supply,
Alternatively, it is determined that either the cleaning member is supplied and the fixing roller is rotationally driven.

Further, in the invention according to claim 5, the heating control means starts heating of the fixing roller by the heating means after the operation processing of the cleaning member supply means and the fixing roller is completed. Characterize.

Further, the invention according to claim 6 is characterized in that an unfixed toner detecting means for detecting the unfixed toner adhering to the fixing roller is provided.

[0021]

According to the image forming apparatus of the present invention, the operation determining means determines the following based on the fixing roller temperature detecting means for detecting the temperature of the fixing roller and the temperature detected by the fixing roller temperature detecting means. The operation of the cleaning member supply unit and the operation of the fixing roller in the process are determined. The heating control unit controls the cleaning member supply unit and the fixing roller to perform processing based on the determination result of the operation determining unit, and controls the heating unit to start heating of the fixing roller.

According to another aspect of the image forming apparatus, whether or not the operation determining means supplies the cleaning member from the cleaning member supplying means based on the temperature detected by the fixing roller temperature detecting means. , Or supplying the cleaning member and rotationally driving the fixing roller.

Further, according to the image forming apparatus of the third aspect, the operation determining means operates the cleaning member supplying means based on the time from when the image forming apparatus is stopped during operation until the apparatus power is turned on again. Determine and determine the operation of the fixing roller. The heating control unit controls the cleaning member supply unit and the fixing roller to perform processing based on the determination result of the operation determining unit, and controls the heating unit to start heating of the fixing roller.

Further, according to the image forming apparatus of the fourth aspect, the operation determining means controls the cleaning member supplying means from the cleaning member supplying means based on the time from when the image forming apparatus is stopped during operation to when the power of the apparatus is turned on again. It is determined whether to supply the cleaning member, or to supply the cleaning member and rotate the fixing roller.

According to the fifth aspect of the image forming apparatus, the heating control means causes the heating means to start heating the fixing roller after the cleaning member supply means and the processing are completed.

According to a sixth aspect of the present invention, there is provided an unfixed toner detecting means for detecting unfixed toner adhering to the fixing roller.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments.

(1) First Embodiment FIG. 1 shows the fixing device S in the image forming apparatus of the first embodiment.
FIG. 3 is a schematic side sectional view of a peripheral device (hereinafter, referred to as a fixing device S and the like) and peripheral devices.

As shown in FIG. 1, a conveying section B composed of a belt or the like is arranged on the upstream side (right side) of the fixing device S, and the fixed transfer is made on the downstream side (left side) of the fixing device S. A discharge part H for discharging the material is provided.

The fixing roller 1 is disposed in the substantially central portion of the fixing device S, and the fixing roller 1 is rotationally driven in the clockwise direction by a drive motor (not shown). The fixing roller 1 is heated by a fixing heater 38 (see FIG. 2) which is a “heating means”. A pressure roller 2 is arranged in pressure contact with the lower surface side of the fixing roller 1, and a pressure contact portion (nip portion) N is formed by the fixing roller 1 and the pressure roller 2. On the right side of the fixing roller 1, a thermistor 3 which is a “fixing roller temperature detecting means” for detecting the temperature of the fixing roller 1 is arranged in pressure contact with the fixing roller 1 at a predetermined pressure. That is, the arrangement position of the thermistor 3 is on the downstream side of the pressing roller 7 described below with respect to the rotation direction (clockwise direction) of the fixing roller 1, and
It is on the upstream side of the nip portion N.

On the upper right side of the fixing roller 1, a supply shaft 5 for supplying a cleaning web 4 which is a "cleaning member".
(“Cleaning member supplying means”), and a winding shaft 6 for winding the cleaning web 4 is provided on the upper left side of the fixing roller 1. A drive motor (not shown) that rotationally drives the winding shaft 6 is connected to the winding shaft 6. A pressing roller 7 is arranged above the fixing roller 1,
The pressing roller 7 presses the cleaning web 4 against the fixing roller 1 with a predetermined nip width 1.

The transfer section B is composed of a transfer belt 11 and the like, and a transfer material is placed on the upper surface of the transfer belt 11. A transport sensor 12 including a photo sensor for detecting the transfer material is disposed on the upper surface side of the transport belt 11. A fixing guide 8 that guides the transfer material to the nip portion N is arranged between the left end of the transport portion B and the nip portion N.

On the left side of the discharge section H, there is provided a discharge door 22 which can be opened and closed by rotating around a pin 21.
The paper discharge door 22 is opened to perform a paper discharge operation for removing jammed paper. A paper discharge sensor 23 including a photo sensor is attached to the paper discharge door 22, and the paper discharge sensor 23 detects the transfer material that has passed through the nip portion N. A door sensor 24 is attached to the main body of the apparatus to detect opening / closing of the paper discharge door 22.

Then, the transfer material electrostatically holding the toner image is conveyed in the direction of arrow X by the conveyor belt 11 and is guided to the nip portion N via the fixing guide 8 to be nip portion N.
Pass through. During this passage, the toner image is fused and fixed to the transfer material by the heat and pressure applied by the fixing roller 1 and the pressure roller 2, and then discharged to the outside of the apparatus.

Next, the configuration of the control system of the fixing device S and the like is shown in FIG.
It will be described based on.

As shown in FIG. 2, a control unit 31 including a CPU, a ROM, a RAM and the like which are "operation determining means" and "heating control means" includes a fixing roller drive circuit 32 for rotationally driving the fixing roller 1. The web driving circuit 34 for rotating the winding shaft 6, the fixing roller temperature detection circuit 36 for recognizing the temperature of the fixing roller 1 detected by the thermistor 3, and the jamming state of the transfer material in the fixing device S are generated. A fixing jam determination circuit 37 for determining whether or not there is a fixing heater 38 for heating the fixing roller 1 is connected.

A fixing roller drive motor 32 is connected to the fixing roller drive circuit 32, a winding shaft drive motor 35 is connected to the web drive circuit 34, and a thermistor 3 is connected to a fixing roller temperature detection circuit 36. The conveyance sensor 12 and the paper discharge sensor 23 are connected to the jam detection circuit 37. The fixing jam determination circuit 37 determines whether or not a jam has occurred, for example, based on whether or not the time from when the transfer material passes through the transport sensor 12 to when it reaches the paper discharge sensor 23 is within a preset time. To do.

Next, the fixing device S constructed as described above.
Operations such as the above will be described based on the flowchart shown in FIG.

The flow chart shown in FIG. 3 is based on the fixing device S.
After a jam occurs in etc., the jam processing is finished,
The flow until the normal fixing operation is restarted after the predetermined condition is cleared is shown.

When a jam occurs in the fixing device S or the like, the control unit 31 controls the operation of the apparatus main body (machine operation) to stop. At the same time when the machine operation is stopped, the fixing jam determination circuit 37 detects that the transfer material is fixed on the fixing device S based on the signals from the conveyance sensor 12 and the paper discharge sensor 23.
When it is determined whether or not it exists, the control unit 31 stores the result.

The controller 31 controls the driving of the fixing roller 1 and the pressing roller 7 based on the fact of the jam occurrence stored in the controller 31 and the temperature signal from the fixing roller temperature detection circuit 36. (Step S
1). That is, when the fixing jam is not detected, the unfixed toner does not adhere to the fixing roller 1 during the jam processing, and there is no possibility of causing the offset phenomenon, so that the normal operation is performed (step S1; N and step S7). Here, the normal operation in step S7 means that the fixing heater 38 is in contact with the cleaning web 4 in sliding contact with the fixing roller 1.
Is turned on (step S7a), the fixing roller 1 is rotationally driven (step S7b), the temperature of the fixing roller 1 is finally adjusted (step S7c), and the rotational driving of the fixing roller 1 is stopped (step S7c). Step S7d),
This is the operation until the copy can be accepted (step S7d).

When it is determined in step S1 that a fixing jam has occurred (step S1; Y), the temperature T of the fixing roller 1 detected by the thermistor 3 is the first temperature T1 set in advance (for example, 140 ° C.). In the above case, the toner has already been transferred to the transfer material and the offset toner (unfixed toner) has not adhered to the fixing roller 1, so that the normal operation is performed (step S2; Y and step S).
7).

In step S2, the second temperature T which is lower than the preset first temperature T1 and which is preset is set.
In the case of 2 or more (for example, 100 ° C. to less than 140 ° C.), a small amount of unfixed toner adheres to the transfer material on the fixing roller 1 (step S3; Y).
Is output to the web drive circuit 34, and the take-up shaft drive motor 35 is rotated for t1 seconds (for example, 3 seconds) to control the nip portion N so that the cleaning web 4 at a fresh position is located. Then, the normal operation is performed (steps S6 and S7). In this case, the fixing roller is rotationally driven and turned on in the normal operation (step S7).
b to step S7d), the fresh cleaning web 4 having a large wiping ability due to the unused portion wipes off the unfixed toner adhering to the fixing roller 1.

Here, the first temperature T1 is set to the lower limit temperature at which normal copying is possible (for example, 140 ° C.), and at this temperature, the toner on the fixing roller 1 is completely transferred to the transfer material. Further, the second temperature T2 is set to the upper limit temperature at which the unfixed toner is not melted at all (for example, 100
° C).

In step S3, the fixing roller 1 is moved to the second position.
When the temperature is lower than T2 (step S3; N), it is highly likely that a large amount of unfixed toner adheres to the surface of the fixing roller because it is not transferred to the transfer material during the jam processing. Therefore, the controller 31 outputs a signal (t2 seconds, for example, 2 seconds) for rotating the fixing roller 1 a predetermined number of times to the fixing roller drive circuit 32 (step S4). Then, the control unit 31 outputs a signal for rotating the winding shaft 6 a predetermined number of times to the web drive circuit 34 (t3 seconds, for example, 3 seconds),
The cleaning web 4 is wound by the rotation of the winding shaft 6 (step S5), and then the normal operation is performed (step S7). As described above, during the steps S4 to S5, a large amount of the offset toner attached to the fixing roller 1 is taken in by the pressure contact portion between the pressing roller 7 and the fixing roller 1,
The taken-in toner is removed from the fixing roller 1 by winding the cleaning web 4. That is, before the fixing heater in normal operation heats to fuse the unfixed toner to the fixing roller 1, the cleaning web 4 is brought into sliding contact with the rotating fixing roller 1 to wipe off a large amount of the unfixed toner. After this process is completed, normal operation is performed.

(2) Second Embodiment The difference between this embodiment and the first embodiment is that the unfixed toner (offset toner) is completely wiped off when the temperature of the fixing roller 1 is low in this embodiment. The point is that the fixing roller 1 is repeatedly wiped with a fresh cleaning web until it is removed.

FIG. 4 is a sectional view of the fixing device S1 of the second embodiment, FIG. 5 is a block diagram of a control system, and FIG. 6 is a flow chart of the operation.

As shown in FIG. 4, in the vicinity of the fixing roller 1, between the thermistor 3 and the sliding contact of the pressing roller 7, a photodiode sensor 51 as "unfixed toner detecting means" is arranged. ing.

Further, as shown in FIG. 5, a photodiode sensor 51 is connected to the control unit 31 via an offset toner detection circuit 52.

Next, the operation of the second embodiment constructed as described above will be explained based on the flow chart shown in FIG. In the flow chart, the flow from step S1 to step S6 and the flow inside step S7 (step S7a to step S7e) are the same operations as in the case of the first embodiment, and therefore redundant description will be omitted.

As shown in FIG. 6, in steps S4 and S5, the fixing roller 1 is rotationally driven for t2 seconds, and the cleaning web 4 is rotationally driven almost at the same time to wipe off unfixed toner (offset toner). Next, in step S8, the photodiode sensor 5
1, the presence or absence of unfixed toner is inspected. If the unfixed toner adheres to the surface of the fixing roller 1 (step S8; Y), the steps S4 and S are performed again.
5 is repeated, and this repetition is repeated until the unfixed toner is sufficiently wiped off. When the unfixed toner is sufficiently wiped (step S8; N), step S
7 shifts to the normal operation.

As described above, when the unfixed toner attached to the fixing roller 1 is sufficiently wiped off, the quality of the next transfer material can be stabilized.

(3) Third Embodiment The difference between this embodiment and the first embodiment is that the driving of the fixing roller and the cleaning member is determined based on the temperature of the fixing roller in the first embodiment. In this embodiment, the driving of the fixing roller and the cleaning web is controlled based on the time from the occurrence of the jam to the power-on of the apparatus body.

This is because the fixing heater is turned off when a jam occurs, so that the temperature of the fixing roller decreases in proportion to the passage of time. That is, as the time elapses after the fixing heater is turned off, a large amount of unfixed toner adheres to the fixing roller after the jam processing.

Therefore, in this embodiment, the drive of the fixing roller and the cleaning web is controlled by counting the time from the occurrence of the jam until the power is turned on again. It should be noted that when the power is cut off during a jam process or the like, the control unit 31 and the like may be backed up by a backup battery.

The operation of the third embodiment based on the above concept will be described below.
This will be described with reference to the flowchart shown in FIG.

When t4 seconds (for example, 60 seconds) have not elapsed since the occurrence of the fixing jam (step S1; Y), the temperature of the fixing roller 1 has not decreased and T ≧ T1. Therefore, the unfixed toner is not attached to the fixing roller 1,
The process moves to the normal operation of step S7 (step S9;
Y). In step S9, if the time is 60 seconds or more (step S9; N) and t5 seconds (120 seconds) or less (step S10; Y), the temperature of the fixing roller 1 is slightly lowered and T ≧ T2. Therefore, since a small amount of unfixed toner adheres to the fixing roller 1, the process proceeds to step S6. In step S10, if t5 seconds or more (for example, 120 seconds or more), the temperature of the fixing roller 1 is lower than T2. Therefore, it is determined that a large amount of unfixed toner is attached to the fixing roller 1 (step S
10; N), and thereafter, the processes of step S4, step S5, and step S7 are sequentially performed.

In the first, second, and third embodiments, the fixing roller is heated after the unfixed toner on the fixing roller is wiped by the rotational driving of the cleaning web or the fixing roller. The heating of the fixing roller may be started during the rotational driving of the cleaning web or the fixing roller.

In step S4 of the first, second and third embodiments, the rotation speed of the fixing roller 1 is slower than that during the copying operation, and the rotation speed is preferably within one rotation. This is because when the fixing roller 1 is rotated at high speed (for example, twice the normal rotation speed), unfixed toner may slip through the pressure contact portion between the fixing roller 1 and the pressing roller 7.

In step S4 and step S5, when the fixing roller 1 and the web winding shaft 6 are simultaneously driven to rotate, the unfixed toner coming in rotation is sequentially wiped off with the fresh cleaning web 4. Therefore, the cleaning effect of the fixing roller 1 is improved.

As the signal to the fixing jam judging circuit 37, the signal of the door sensor 24 which outputs a signal associated with the opening / closing of the paper discharge door 22 may be used. The reason why the paper discharge door 22 is opened is that there are many cases where jam processing is performed.

In addition, after the step S5 of the flow chart of the third embodiment (FIG. 7), a step for determining the presence or absence of offset toner is inserted. If offset toner is present, the process returns to step S4, and if offset toner is not present. You may make it transfer to step S7 (same as step S8 of FIG. 6).

[0063]

As described above, according to the invention described in each claim, after the fixing jam process, the temperature of the fixing roller detected by the fixing roller temperature detecting means is detected or the image forming apparatus is operating. When the fixing roller is heated, for example, the fixing roller is heated after the unfixed toner adhering to the fixing roller is prevented from remaining based on the time from when the fixing roller is turned on until the power is turned on again. The unfixed toner is wiped off, and there is no unfixed toner on the surface of the fixing roller during copying, so that the image surface and the back surface of the transfer material are not stained.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of an image forming apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a control system of the first embodiment.

FIG. 3 is a flowchart showing an operation when a fixing jam occurs in the first embodiment.

FIG. 4 is a schematic side sectional view of an image forming apparatus according to a second embodiment of the present invention.

FIG. 5 is a block diagram of a control system of the second embodiment.

FIG. 6 is a flowchart showing an operation when a fixing jam occurs in the second embodiment.

FIG. 7 is a flowchart showing an operation when a fixing jam occurs in the third embodiment.

FIG. 8 is a characteristic diagram showing a temperature change of a fixing roller in a conventional image forming apparatus.

[Explanation of symbols]

B Conveying Section H Discharging Section N Nip Section S Fixing Device 1 Fixing Roller 2 Pressurizing Roller 3 Thermistor (Fixing Roller Temperature Detection Means) 4 Cleaning Web (Cleaning Member) 5 Supply Shaft (Cleaning Member Supplying Means) 7 Pressing Roller 12 Conveyance Sensor 23 Paper Ejection Sensor 31 Control Unit (Operation Determining Unit, Heating Control Unit) 36 Fixing Roller Temperature Detection Circuit 37 Fixing Jam Judgment Circuit 38 Fixing Heater (Heating Unit) 51 Photodiode Sensor (Unfixed Toner Detection Unit)

Claims (6)

[Claims] 1. A transfer material on which a toner image is formed is pressed into contact,
A fixing roller that melts and fixes the toner image on the transfer material, a heating unit that heats the fixing roller, and a cleaning member supply unit that supplies a cleaning member that wipes off the toner adhering to the fixing roller. In an image forming apparatus equipped with the fixing roller, a fixing roller temperature detecting means for detecting the temperature of the fixing roller, and a temperature detected by the fixing roller temperature detecting means
An operation determining unit that determines the operation of the cleaning member supply unit and an operation of the fixing roller, and controls to perform processing by the cleaning member supply unit and the fixing roller based on the determination result of the operation determination unit, and An image forming apparatus comprising: a heating control unit that controls the heating unit to start heating the fixing roller. 2. The operation determining means determines whether or not to supply the cleaning member from the cleaning member supply means, or to supply the cleaning member and the fixing roller, based on the temperature detected by the fixing roller temperature detecting means. The image forming apparatus according to claim 1, wherein the image forming apparatus is configured to be driven or rotated. 3. A transfer material on which a toner image is formed is brought into pressure contact,
A fixing roller that melts and fixes the toner image on the transfer material, a heating unit that heats the fixing roller, and a cleaning member supply unit that supplies a cleaning member that wipes off the toner adhering to the fixing roller. In an image forming apparatus provided with the image forming apparatus, an operation determining unit that determines the operation of the cleaning member supply unit and the operation of the fixing roller based on the time from when the image forming apparatus stops during operation to when the apparatus power is turned on again, Heating control means for controlling the processing by the cleaning member supply means and the fixing roller based on the determination result of the operation determining means, and for controlling the heating means to start heating of the fixing roller; An image forming apparatus characterized by being provided. 4. The operation determining unit determines whether or not to supply the cleaning member from the cleaning member supply unit, or the cleaning, based on the time from when the image forming apparatus is stopped during operation to when the apparatus power is turned on again. The image forming apparatus according to claim 3, wherein it is determined whether the fixing roller is rotationally driven while a member is supplied. 5. The heating control means starts the heating of the fixing roller by the heating means after the operation processing of the cleaning member supply means and the fixing roller is completed. Item 3. The image forming apparatus according to item 3. 6. The image forming apparatus according to claim 1, further comprising an unfixed toner detection unit that detects unfixed toner attached to the fixing roller.