JPH0895447A - Device for removing image forming substance from image holding body - Google Patents

Abstract

PURPOSE: To provide a toner removing device where instantaneous power consumption by plural heating lamps is restrained to be equal to or under a specified value and where the temperature of the upper and the lower heating rollers of a toner peeling unit and that of the heating drum of a drying unit reaches a usable temperature nearly at the same time. CONSTITUTION: This device is provided with a thermistor which detects the temperature of the upper and the lower heating rollers 45 and 46 incorporating the heating lamps 45a and 46a and that of the heating drum 61 incorporating the heating lamp 61, and a control part which divides control reference time T into three control time zones T45 , T46 and T61 corresponding to the respective heating lamps at a specified rate and on/off controls the respective heating lamps in the control time zones based on the result of comparing the detected temperature of the rollers 45 and 46 and the drum 61 with ycontrol target temperature. The rate of dividing the time into the control time zones may be corrected based on a temperature difference between the detected temperature and the control target temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image carrier for removing an image forming substance from an image carrier having an image formed by the image forming substance on the surface thereof by an image forming apparatus such as a copying machine, a facsimile machine, a printer or a printing machine. The present invention relates to an image forming substance removing device.

[0002]

2. Description of the Related Art Conventionally, various methods and apparatuses for removing an image forming substance such as toner from a sheet as a recorded image carrier to regenerate the image carrier are known. For example, as a method using a solvent, JP-A-1-101
Japanese Patent Laid-Open No. 576 discloses a method of removing an image forming substance in which a sheet having a toner attached thereto is dipped in a soluble solvent of a toner resin and ultrasonic vibration is applied to release the toner dissolved in the solvent from the surface of the sheet. . In addition, JP-A-4-30039
No. 5 discloses that a solvent is attached to a printed portion of waste paper by a method such as dipping, spraying or coating to dissolve the toner, and the dissolved toner is washed, air suction, adsorbent contact, mechanical peeling, electrostatic adsorption or the like. The method of removing an image-forming substance is disclosed.

The applicant of the present invention previously mentioned that the recorded image carrier has water as a destabilizing solution and an aqueous solution containing a surfactant,
At least one kind of water or an aqueous solution selected from the group consisting of an aqueous solution containing a water-soluble polymer and an aqueous solution containing a surfactant and a water-soluble polymer is held, and a peeling member is interposed to remove the image-forming substance. A method for removing an image-forming substance is proposed, in which the member is heated or pressure-bonded to a member and peeled from the image carrier (for example, Japanese Patent Application No. 4-255916).
No., Japanese Patent Application No. 5-239075). According to this
Only the image-forming substance can be removed without relatively damaging the paper quality of the image carrier.

Further, by using a predetermined peeling member having an adhesive force larger than the adhesive force between the surface of the image carrier and the image forming substance to the image forming substance, an image having the image forming substance adhered to the surface thereof is used. An image forming substance removing device capable of surely removing only the image forming substance from the holder has been proposed (see, for example, Japanese Patent Application No. 5-280417).

Further, the image holding is performed by efficiently removing at least a part of the water or the aqueous solution from the image carrier after the image forming substance is removed in the state where the water or the aqueous solution as the destabilizing liquid is applied. An image forming substance removing device capable of drying the body has been proposed (for example, Japanese Patent Application No. 5-269).
873).

[0006]

The proposed image-forming substance removing device may be provided with heating means for heating the image carrier, the image-forming substance, the destabilizing liquid, etc., respectively. For example, in order to heat and soften the image-forming substance on the image carrier, a softening member is brought into direct or indirect contact with the image-forming substance, and a heating means for heating the softening member is provided. In order to remove the destabilizing liquid of water or aqueous solution and dry the image carrier, a drying member is brought into contact with the image carrier after the peeling treatment, and a heating means for heating the drying member is provided. There is.

However, in the image forming substance removing apparatus provided with a plurality of heating means for heating each of a plurality of heating objects including the softening member and the drying member, the current temperature of each heating object and the control target temperature. When the control time zone of each heating means is set independently based on the above, and each heating means is independently driven and controlled, a large amount of electric power may be required. In particular, until the object to be heated which is heated by each heating means reaches a temperature at which the image forming material can be removed by starting to energize the image forming material removing device, all the heating means are driven reliably, and a large amount of power is consumed. Will be needed. Further, after the image forming substance removing device reaches the image forming substance removable temperature, the maximum electric power at the time of driving all the heating means is not reached on the time average, but when viewed instantaneously, all the heating means are simultaneously driven. Therefore, a large amount of power may be required.

Further, when the objects to be heated are heated to a predetermined temperature by a plurality of heating means at the start of use of the conventional image forming substance removing apparatus, even if some of the objects to be heated reach the usable temperature, If the temperature of the other heating target does not reach the usable temperature, the entire image forming substance removing apparatus does not become usable. Therefore, it is preferable that the temperatures of the plurality of objects to be heated reach the usable temperature substantially at the same time.

The present invention has been made in view of the above problems, and an object of the present invention is to suppress instantaneous power consumption by a plurality of heating means provided in the apparatus to a predetermined value or less and An object of the present invention is to provide a device for removing an image forming substance from an image carrier, which can simultaneously reach the usable temperature of the heating object heated by the heating means.

[0010]

In order to achieve the above-mentioned object, the invention of claim 1 provides an image carrier having an image-forming substance stably attached to the surface thereof, which comprises: A destabilizing liquid applying means for applying a destabilizing liquid that makes the adhered state unstable, and an image forming substance on the image carrier to which the destabilizing liquid is applied, directly or indirectly contact with the softening member. A softening means for softening the image-forming material, a peeling means for peeling and removing the image-forming substance from the image holding member by bringing the softened image-forming substance and the peeling member into contact with each other and then separating them, and the image-forming substance. And a drying unit for directly or indirectly contacting the image holding member from which the drying member has been removed with the drying member, and a plurality of heating units for respectively heating the plurality of heating objects including the softening member and the drying member. In the apparatus for removing the image-forming substance from the image carrier, Temperature detection means for detecting the temperature of the heat target is divided at a predetermined ratio control reference time continuously repeated a plurality of control time slot corresponding to each heating means,
Based on the comparison result between the detected temperature of each heating object and the control target temperature, each heating means is turned on or off during each control time period.
It is characterized in that it is provided with a control means for controlling so.

According to a second aspect of the present invention, in the image forming substance removing device from the image carrier according to the first aspect, each of the control reference times is based on the detected temperature and the control target temperature of each of the heating objects. It is characterized in that a control means for correcting the ratio of division into control time zones is provided.

In particular, in the invention of claim 3, in the image forming substance removing device from the image carrier of claim 1, the temperature difference between the detected temperature of each heating object and the control target temperature is calculated, and the temperature is calculated. It is characterized in that a control means for correcting the ratio of division of the control reference time into each control time zone based on the difference is provided.

In particular, the invention of claim 4 relates to claim 1 or 2.
In the image forming substance removing device from the image carrier, the temperature increase rate of each heating object is calculated from a plurality of detection temperatures detected at predetermined time intervals for each heating object, and the calculation result of the temperature increase rate. Based on the above, a control means for correcting the ratio of division of the control reference time into each control time zone is provided.

[0014]

According to the first aspect of the present invention, a plurality of control reference times which are continuously repeated are made to correspond to respective heating means for heating a plurality of heating objects including the softening member of the softening means and the drying member of the drying means. The control time zones for turning on or off the heating means do not overlap by dividing the control time zones into the control time zones. Then, the temperature detection means detects the temperature of each heating object, the control means, based on the comparison result of the detected temperature of each heating object and the control target temperature,
When the detected temperature is lower than the control target temperature, the corresponding heating means is turned on during the control time period. On the other hand, when the detected temperature is equal to or higher than the control target temperature, the corresponding heating means is turned off during the control time period. In this way, by turning on or off each heating means during different control time zones, each heating means is prevented from turning on at the same time, and the instantaneous power consumption for all the heating means provided in the apparatus is larger than a predetermined value. Try not to be.

When the control reference time is divided into a plurality of control time zones corresponding to each heating means, the control reference time is divided at a predetermined ratio. For example, the rate of temperature rise per unit time of the heating object heated by the drive of each heating means is checked in advance, and the rate determined based on the rate of temperature rise is such that the smaller the temperature rise rate, the longer the control time period. Split with. In addition, for example, based on the difference between the detected temperature of each heating object at the start of control and the control target temperature, the control time zone is divided as the difference increases, and the division is performed. In this way, by dividing the control reference time into a plurality of control time zones at a predetermined ratio, the timing at which the plurality of heating objects such as the softening member and the drying member reach the usable temperature is brought close.

Particularly, in the invention of claim 2 or 3,
Based on the detected temperature of each heating object and the control target temperature, the ratio of division of the control reference time into each control time zone is corrected.
For example, a temperature difference between the detected temperature and the control target temperature or a temperature ratio of the detected temperature to the control target temperature is calculated, and based on the temperature difference or the temperature ratio, the larger the temperature difference or the smaller the temperature ratio. The division ratio is corrected so that the control time zone becomes longer. By correcting the ratio of division of the control reference time into the control time zones in this way, the timing at which each heating object reaches the usable temperature is made closer to each other.

In particular, in the invention of claim 4, the temperature of each heating object is detected at a predetermined time interval, and the temperature increase rate of each heating object is calculated from the plurality of detected temperatures. Then, based on the calculation result of the temperature increase rate, by correcting the ratio of division of the control reference time into each control time zone such that the control time zone becomes shorter as the temperature increase rate increases, each heating target object is corrected. The temperature at which the object reaches the usable temperature is set closer to each other between the heating objects.

[0018]

EXAMPLES In the following, according to the present invention, from a transfer paper as an image carrier on which an image is formed by a transfer type electrophotographic copying machine, a hydrophobic and thermo-flexible electrophotographic toner as an image forming substance ( Hereinafter, an embodiment applied to an image forming substance removing device (hereinafter, referred to as a toner removing device) from an image carrier for removing the toner will be described.

First, an outline of an example of a toner removing device to which the present invention can be applied will be described. In FIG. 1, the toner removing device includes a paper feed unit 20 for separating and feeding the transfer papers 10 on which toner images are formed and stored in a stacked state, and a transfer unit 20 for transferring the paper. Paper 1
Liquid applying unit 30 for applying a liquid to 0, a toner peeling unit 40 as a peeling unit for peeling the toner from the transfer paper 10 to which the liquid is applied, and the transfer paper 1 from which the toner is removed.
Drying unit 60 as a finishing device for drying 0
And a paper receiving unit 70 for receiving the transfer paper 10 discharged from the drying unit 60.

The sheet feeding unit 20 feeds the transfer sheets 10 stacked on the sheet feeding table 21 with the surface on which the toner image is formed (hereinafter referred to as a toner image surface) facing downward from the lowest sheet. The roller 22 feeds the sheet, the separation roller pair 23 separates the multi-fed sheet, and only one sheet of the transfer sheet 10 is sent out by the sheet feeding / conveying roller pair 24. The specific configuration and operation are the same as those of the paper feeding mechanism in the electrophotographic copying machine, and therefore detailed description will be omitted.

The liquid applying unit 30 transfers the treatment liquid 31 as a destabilizing liquid such as water or an aqueous solution containing a surfactant for improving the permeability to the transfer paper 1 to the transfer paper 1.
It is given to 0. In the illustrated example, the liquid container 32 that stores the liquid, and the transfer paper 1 that is provided so as to be partially submerged in the liquid in the liquid container 32 and pumps the liquid by rotation
An application roller 33 that applies the toner image surface of 0 and a regulation roller 34 as a paper regulation member that is provided so as to face the application roller 33 with the paper conveyance path interposed therebetween are provided. As the application roller 33, a material having a liquid retaining property, for example, a roller made of a hydrophilic porous material, sponge, or a roller made of an elastic body such as rubber or a rigid body such as metal can be used.

Further, the liquid applying unit 30 guides the transfer paper 10 sent from the paper feeding unit 20 to a portion (hereinafter, referred to as a liquid applying portion) facing the applying roller 33 and the regulating roller 34. A paper guide mechanism 35 and a second paper guide mechanism 36 that guides the transfer paper 10 that has passed through the liquid application unit to the toner peeling unit 40 side are provided.

The toner peeling unit 40 includes a plurality of belt supporting rollers (hereinafter referred to as supporting rollers) 41 and 4.
A toner offset belt (hereinafter referred to as an offset belt) 44 as a peeling belt wound around 2, 43
And heating lamps 45a, 4 as heating means provided so as to be pressed against each other with the offset belt 44 interposed therebetween.
Upper and lower heating rollers 45 and 46 built in 6a, and a belt cleaning device 47 for removing toner from the surface of the offset belt 44 are provided. At least the surface of the offset belt 44 is applied to the transfer paper 1 against the softened toner.
It is formed of a material having an adhesive force larger than the adhesive force between the surface of No. 0 and the toner. For example, the belt itself is made of a metal material such as an aluminum-based material, a copper-based material, a nickel-based material, or a polymer-based material such as polyethylene terephthalate (PET) in which titanium oxide is dispersed. Further, the upper and lower heating rollers 45 and 46 are softening members of a softening unit that brings the toner image surface of the transfer paper 10 into close contact with the offset belt 44 and softens the toner on the transfer paper 10, and is heated by the heating lamps 45a and 46a. It is also an object to be heated. The heat of the upper and lower heating rollers 45, 46 is generated by the offset belt 4.
By being transmitted to the toner on the transfer paper 10 via the transfer sheet 4 and the transfer paper 10, the toner on the transfer paper 10 is heated and softened.

Of the supporting rollers for supporting the offset belt 44, the belt is wound around the supporting roller (hereinafter referred to as a separating roller) 43 around which the belt portion after passing through the pressing portions of the upper and lower heating rollers 45, 46 is wound. Of the transfer paper 1 from the offset belt 44 by rapidly changing the moving direction of the
The curvature separation of 0 is performed. Further, a guide roller 48 and a tension roller 49 for increasing the change in the moving direction of the belt are also provided.

Further, the belt cleaning device 47
Is a rotating brush roller 50 that applies intermittent scratching force to the circumferential surface of the offset belt 44 to remove the adhered toner.
And a pad 51 on the downstream side of the rotating brush roller 50 in the belt moving direction to remove the adhered toner by scrubbing by the frictional force by contacting with the peripheral surface of the belt. It is adapted to be housed in the casing 52.

Further, the toner peeling unit 40 includes
The transfer paper 10 sent from the liquid applying unit 30 side,
There are also provided a pair of relay conveyance rollers 53 as a holding conveyance means for advancing into the pressurizing section, and an upper and lower guide member 54 for guiding the transfer paper 10 having the curvature separated from the offset belt 44 to the drying unit 60 side.

The drying unit 60 is, for example, the transfer paper 1.
The transfer paper 10 is dried so that the liquid holding amount of 0 is 10% or less of the paper weight, and the heating drum 61 is a drying member made of, for example, aluminum and has a built-in heating lamp 61a as a heating unit. It is composed of a paper pressing belt 63 that is stretched around a supporting roller 62 and moves endlessly while being wound around the peripheral surface of the heating drum 61 at a constant angle. In the illustrated example, one support roller 62 also serves as a tension roller. As the material of the paper pressing belt 63, a material having heat resistance and air permeability, for example, cloth such as canvas cloth, cotton cloth, and Tetoron cloth can be used. The heating drum 61 is the heating lamp 61a.
The transfer paper 10 is also dried by the heat of the heating drum 61.

In the drying unit 60, an upper and lower guide member 64 for guiding the transfer paper 10 that has passed through the holding region between the heating drum and the paper pressing belt, and a paper receiver for the transfer paper 10 guided thereby. A paper discharge roller pair 65 for discharging paper is provided on the paper receiving surface of the unit 70.

In the toner removing device having the above-mentioned structure, the transfer paper 10 sent from the paper feeding unit 20 is supplied with the liquid uniformly on the toner image surface by the liquid supply unit 30 and sent to the toner peeling unit 40. In the toner peeling unit 40, the toner adhered to the transfer paper 10 is softened by heating from the heating rollers 45 and 46, and the offset belt 44
Adhere to the surface. When the transfer paper 10 and the offset belt 44 are separated around the separation roller 43, the toner adhering to the surface of the offset belt 44 is peeled off from the transfer paper 10, whereby the toner is removed from the transfer paper 10. The transfer paper 10 from which the toner has been removed has a drying unit 60.
Then, it is dried and discharged to the paper receiving unit 70. In this way, the liquid is supplied to the transfer paper 10 to which the toner adheres, and the toner is peeled off in a state where the liquid permeates the interface of the transfer paper 10 with the toner, so that the toner can be removed without damaging the paper fiber. .

Further, since the paper pressing belt 63 having water absorbability is brought into contact with the transfer paper 10 in the drying unit 60, in addition to the drying by heating from the heating lamp 61a inside the heating drum 61, the paper pressing belt 63 is pressed. A drying promoting function can also be exerted by adhering the treatment liquid 31 of the transfer paper 10 to the application belt 63.

FIG. 2 is a block diagram of an electric component part of the toner removing device of FIG. The commercial power source 901 is connected to a direct current power source (PSU) 903 and the like via a main switch 902. Further, the control unit as the control unit of the toner removing device includes a CPU 904, a ROM 905, a CLK oscillator 90.
6, address data bus 907, parallel interface 908, driver 910, A / D converter 91
8, RAM 919, control unit 92 of the operation display unit (not shown)
0, serial interface 921 and the like. (Hereafter, margin)

A CLK oscillator 906 is connected to the CPU 904 of the control unit, and an address data bus 907 is further provided.
ROM 90 in which the control program is written via
5, parallel interface 908, A / D converter 918, RAM 919, serial interface 9
21 and the like are connected. A driver 910 for driving a relay, a motor, etc. is connected to the output port of the parallel interface 908.

A control section 920 of the operation display section is connected to the output port of the serial interface 921. Further, the A / D converter 918 has a thermistor 912 as a temperature detecting means for detecting the temperatures of the heating rollers 45 and 46 and the heating drum 61, which are heating objects.
b, 913b, 914b are connected.

The commercial power source 901 includes, in addition to the DC power source (PSU) 903, a main switch 902, a relay 911 and a solid state relay SSR1 (91).
2), the heating lamp 4 that heats the upper and lower heating rollers 45 and 46 through the SSR2 (913) and the SSR3 (914).
Resistors 912a and 913a corresponding to 5a and 46a, and a resistor 914a corresponding to the heating lamp 61a for heating the heating drum 61 are connected.

The driver 910 includes solid-state relays SSR1 (912) and SSR2 (91).
3), SSR3 (914), paper feed motor 923, registration motor 924, main drive motor 922, coating roller motor 925 for driving coating roller 33, heating roller motor 926 for rotationally driving upper and lower heating rollers 45, 46.
a, b, a rotary brush roller motor 927 that rotationally drives the rotary brush roller, a relay conveyance roller motor 928 that rotationally drives the relay conveyance roller pair 53, a heating drum motor 929 that rotationally drives the heating drum 61, and a discharge roller pair 65. The sheet discharge roller motor 930 that is rotationally driven and the contact drive coil 911a of the relay 911 are connected.

In the above electrical equipment section, the main switch 90
2 is turned on, the commercial power source 901 switches to the DC power source (PS
U) 903 is supplied with AC power supply voltage, and this DC power supply 9
From 03, DC power supply voltage is supplied to each control IC. D
The CPU 904, to which the C power supply voltage is supplied, resets the program counter and the like, and starts control based on the content of the control program written in the ROM 905. Further, the CLK oscillator 906 supplies a reference clock (CLK) necessary for CPU operation.

When data for turning on the relay 911 from the CPU 904 is sent to the driver 910 via the parallel interface 908, the contact drive coil 911a of the relay 911 is energized, the contact of the relay 911 is closed, and the heating lamp 45a, The AC power supply voltage is supplied to the heating control circuits 46a and 61a. And the CPU 90
When the data for turning on the relays 912, 913, and 914 from the No. 4 is sent to the driver 910, the relay 91
2, 913, 914 are turned on, and the resistors 912a, 912a, 9
A current flows through 13a to start heating the upper and lower heating rollers 45 and 46 by the heating lamps 45a and 46a, and a current flows through the resistor 914a to start heating the heating drum 61 by the heating lamp 61a. Further, the analog detection data of the temperatures of the upper and lower heating rollers 45 and 46 and the heating drum 61 detected by the thermistors 912b, 913b and 914b are converted into digital data by the A / D converter 918 and read into the CPU 904, and the RAM is read.
It is compared with the target control target temperature value written in 919, and the temperature control described below is executed. The data of the control target temperature can be written in the RAM 919 from the control unit 920 of the operation display unit through the serial interface 921.

FIG. 3 is a flow chart of the temperature control of the heating rollers 45 and 46 and the heating drum 61 which are the objects to be heated by the toner removing device. First, the main switch 9
When 02 is turned on, the thermistors 912b, 913b, 9
14b includes heating rollers 45 and 46 and a heating drum 6
When the relay 911 is turned ON, the resistors 912a, 913a, 914 corresponding to the heating rollers 45, 46 and the heating drum 61 are detected.
It becomes a state where the energization to a can be controlled (step 1). Next, the detection data A ₄₅ , A ₄₆ , A ₆₁ of the current temperatures of the upper and lower heating rollers 45, 46 and the heating drum 61 detected by the thermistors 912b, 913b, 914b are sent to the CPU 904 via the A / D converter 918. Read (step 2).

Next, in the CPU 904, the heating roller 4
5, ₄₆ and the current temperature of the heating drum 61 A ₄₅ , A ₄₆ ,
Based on A ₆₁ and target control target temperatures B ₄₅ , B ₄₆ , B ₆₁ , a temperature difference B ₄₅ − between the current temperature and the control target temperature B ₄₅ −
Calculating the _{A 45, B 46 -A 46,} B 61 -A 61, at a rate corresponding to this temperature difference, the control reference time T is one cycle of the temperature control is set in advance, the heating rollers 45 and 46 The heating drum 61 is divided into three control time zones T ₄₅ , T ₄₆ , and T ₆₁ for independently performing ON / OFF control (step 3).

Here, the control reference time T is set as short as possible within a range in which proper temperature control can be executed in consideration of the signal processing speed of the control section of the electrical equipment section. Specifically, for example, the control reference time T is set to about 5 seconds and the control reference time T is set as one cycle to repeatedly execute the temperature control described later.

Further, the heating lamp 45a, which is a heating means,
The average temperature rising rates may greatly differ until the heating rollers 45, 46 and the heating drum 61 reach the control target temperature during continuous energization of 46a, 61a. In this case, when the heating lamps 45a, 46a, 61a are continuously energized, the average temperature increase rate is obtained in advance by experiments or the like until the heating rollers 45, 46 and the heating drum 61 reach the control target temperature, and the current temperature Temperature difference C from control target temperature
₄₅ (= B ₄₅ −A ₄₅ ), C ₄₆ (= B ₄₆ −A ₄₆ ), C ₆₁ (=
B ₆₁ -A ₆₁ ), that is, in addition to the control data indicating how many times the temperature needs to be raised in total, the control reference time T is set to the control time zones T ₄₅ , T ₄₆ , T in consideration of the temperature rise rate. ₆₁
It is preferable to divide into. By dividing in this way, the timings at which the heating rollers 45 and 46 and the heating drum 61 reach the control target temperatures, which are the usable temperatures, become closer to each other, as compared with the case where the temperature rise rate is not considered, and the entire apparatus is It takes less time to activate.

Next, it is determined whether the current temperature A ₄₅ of the heating roller 45 detected by the thermistor 912b has reached the control target temperature B ₄₅ target (step 4), if not reached the Control time zone T ₄₅ of control reference time T
Then, the relay 912 is turned on to energize the resistor 912a, and the heating lamp 45a is turned on (step 5). On the other hand, if the current temperature A ₄₅ of the heating roller 45 reaches the control target temperature B ₄₅ does not perform the energization of the left resistor 912a to the relay 912 to OFF, the heating lamp control time slot T ₄₅ 45a is kept off (step 4).

Further, the heating roller 46 and the heating drum 61.
Similarly to the case of the heating roller 45, the relay 913 is connected to the respective control time zones T ₄₆ and T ₆₁ only when the current temperatures A ₄₆ and A ₆₁ do not reach the target control target temperatures B ₄₆ and B _61. , 914 to turn on the resistors 913a, 914a
And the heating lamps 45a and 61a are turned on (steps 6 to 9).

Next, after the control reference time T of one cycle has elapsed, the thermistors 912b, 913b, 914 are again activated.
The detection data A ₄₅ , A ₄₆ , A ₆₁ of the current temperatures of the upper and lower heating rollers 45, 46 and the heating drum 61 detected in b are
The data is read into the CPU 904 via the A / D converter 918 (step 2). The temperature difference between the current temperature and the control target temperature C ₄₅ (= B ₄₅ −A ₄₅ ), C ₄₆ (= B ₄₆ −
A ₄₆ ), C ₆₁ (= B ₆₁ −A ₆₁ ) is calculated, and this temperature difference C
₄₅ , C ₄₆ , C ₆₁ , for example, as shown in Table 1, under the condition that the control reference time T = T ₄₅ + T ₄₆ + T ₆₁ is constant, the three control time zones T ₄₅ , T ₄₆ , T _{61 are shown.} The control reference time T is divided by correcting the ratio of division into (step 3). For example, when the temperature differences C ₄₅ , C ₄₆ , C ₆₁ with respect to the upper and lower heating rollers 45, 46 and the heating drum 61 are substantially the same, the lengths of the control time zones T ₄₅ , T ₄₆ , T ₆₁ are not changed, Control the temperature. Further, for example, when the temperature differences C ₄₅ and C ₄₆ with respect to the upper and lower heating rollers ₄₅ and ₄₆ are substantially the same and only the temperature difference C _{61 with} respect to the heating drum 61 is large, the control time zones T ₄₅ and T ₄₆ are shortened by z. , The control time zone T ₆₁ is lengthened by 2z to control the temperature. Here, in Table 1, “C ₄₅ ≈
“C ₄₆ ” indicates that C ₄₅ and C ₄₆ are substantially equal and satisfy 0 ≦ C ₄₆ −C ₄₅ <α. In “C ₄₅ <C ₄₆ ”, C ₄₅ is C ₄₆
Indicates that satisfies the more slightly smaller _{α ≦ C 46 -C 45 <β} , "C ₄₅ << C _46" is satisfied β ≦ C ₄₆ -C ₄₅ significantly smaller than C ₄₅ is C ₄₆ It indicates that Parameter α for judging the magnitude relationship between C ₄₅ , C ₄₆ and C ₆₁
The optimum values of β and β are set in advance through experiments or the like.

[0045]

[Table 1]

Then, in the control time zones T ₄₅ , T ₄₆ and T ₆₁ divided by the corrected ratio, each heating lamp 45a,
ON / OFF control of 46a and 61a is performed (steps 4 to 9). Hereinafter, the temperature control of steps 2 to 9 is executed until the main power source of the toner removing device is turned off.

As described above, according to this embodiment, the control reference time T of one cycle of the repeated temperature control is set to the heating rollers 45, 46.
And corresponding to the heating drum 61, it is divided into three control time zones T ₄₅ , T ₄₆ , T ₆₁ so as not to overlap each other, and the heating lamps 45a, 46a, 61a are turned on or off during each control time zone. By controlling the heating lamps independently, the instantaneous power consumption for all the heating lamps is reduced as compared with the configuration in which the ON times of the heating lamps overlap each other. It can be kept below a predetermined level.

Further, when the control reference time T is divided into three control time zones T ₄₅ , T ₄₆ and T ₆₁ , the heating roller 45,
46 and heating drum 61 temperature rise rate per unit time and heating rollers 45, 46 and heating drum 61 at the start of control
The control target temperature which is the usable temperature of the heating rollers 45, 46 and the heating drum 61 is, for example, compared to the case where the control reference time T is equally divided into the same control time zone by dividing the control reference time T based on the detected temperature. The timing to reach can be close to each other.

Further, the temperature difference between the detected temperature of the heating rollers 45 and 46 and the heating drum 61 and the control target temperature is calculated,
By correcting the ratio of division of each heating means into the control time zones such that the control time zones T ₄₅ , T ₄₆ , and T ₆₁ become longer as the temperature difference increases, each heating object reaches the usable temperature. The timing of doing can be closer.

In the above embodiment, the heating roller 45,
46 and the current detection temperature of the heating drum 61 A ₄₅ , A ₄₆ ,
The temperature difference between A ₆₁ and the control target temperatures B ₄₅ , B ₄₆ , B ₆₁ is calculated, and each control time zone T ₄₅ , T ₄₆ , T ₆₁ is calculated according to this temperature difference.
The control reference time T is divided by correcting the ratio of division into the control target temperature T, but instead of calculating the temperature difference, the temperature ratio of each detected temperature to the control target temperature is calculated, and the temperature ratio of each detected temperature is calculated. The ratio of division into the control time zones T ₄₅ , T ₄₆ and T ₆₁ may be corrected. Further, instead of calculating the temperature difference, the temperature rise of the heating rollers 45, 46 and the heating drum 61 per control reference time T is made based on the current detected temperature and the detected temperature at the time of the previous temperature detection, for example. The rate may be calculated, and the rate of division into each control time period may be corrected according to the temperature increase rate.

Further, in the above embodiment, the heating roller 4
When one of the heating objects of 5, 46 and the heating drum 61 reaches the control target temperature, the control time zone assigned to the heating object reaching the control target temperature is set to zero, and the assigned time is set. Is added to the control time zone corresponding to other heated objects that have not reached the control target temperature,
The ratio of split to each control time slot T _45, T _46, T ₆₁ may be corrected. For example, if the heating roller 45 has a control target temperature B ₄₅
If the control time zone T ₄₅ of the heating lamp 45a is set to zero, the assigned control time zone T _{45 is changed} to the following formula 1
And the correction is performed so that the heating lamps 45a and 61a are distributed to the control time zones _T46 'and _T61 ' as shown in Equation 2. By correcting the control time zone in this way, the remaining heating roller 46 and heating drum 61 are controlled to the control target temperatures B ₄₆ and B _61.
Will reach you sooner.

[Equation 1] T ₄₆ '= (1+ (T ₄₅ / (T ₄₆ + T ₆₁ ))) × T ₄₆

[Equation 2] T ₆₁ '= (1+ (T ₄₅ / (T ₄₆ + T ₆₁ ))) × T ₆₁

In the above embodiment, the heating roller 45,
46 and the current detection temperature of the heating drum 61 A ₄₅ , A ₄₆ ,
The rate of division into the control time zones T ₄₅ , T ₄₆ , and T ₆₁ is corrected according to only the temperature difference between the A ₆₁ and the control target temperatures B ₄₅ , B ₄₆ , and B _61. In addition to the above, the rate of division into each control time zone may be corrected in consideration of the rate of temperature rise of the heating rollers 45, 46 and the heating drum 61 per control reference time T. In this case, the heating lamps 45a, 4
6a, 61a and heating rollers 45, 46 and heating drum 61 due to changes in heat transfer characteristics to peripheral members.
Since the change in the temperature rise rate is considered one by one, the control accuracy is improved as compared with the case where the change in the temperature rise rate is not considered, and the heating rollers 45 and 46 and the heating drum 61 are improved.
Will reach the usable temperature at the same timing.

Further, in the above embodiment, the control reference time T set to a constant time is divided into the respective control time zones T ₄₅ , T ₄₆ , T ₆₁ at a predetermined ratio, but the control reference time T is constant. without setting the time, the control time slot T _45, T _46, T ₆₁ always heating lamp 45a is in, so that oN 46a, a 61a,
Further, based on the comparison result of the detected temperature of the heating rollers 45, 46 and the heating drum 61 and the control target temperature, it is controlled whether or not the length of each control time period T ₄₅ , T ₄₆ , T ₆₁ is set to zero. May be. In this case as well, since the control time periods do not overlap with each other, the instantaneous power consumption for all the heating lamps becomes small, and the power consumption can be suppressed below a predetermined level. Here, control time zones T ₄₅ , T ₄₆ , and
By setting the initial value of T _{61 on} the basis of the temperature rise rate of the heating roller 45 or the like per unit time or the detected temperature of the heating roller 45 or the like at the start of control, the heating roller 45, 46 and the heating drum 61 can approach the timing of reaching the control target temperature which is the usable temperature. Further, the temperature difference between the detected temperature of the heating rollers 45, 46 and the heating drum 61 and the control target temperature is calculated, and the length of the control time period T ₄₅ for turning on the heating lamp 45a etc. is set according to the temperature difference. You may correct it. By this correction, the timing at which the heating rollers 45, 46 and the heating drum 61 reach the control target temperature which is the usable temperature can be brought closer.

Further, in the above embodiment, the case where the heating objects are three of the heating rollers 45 and 46 and the heating drum 61 is shown, but the present invention has a plurality of heating objects of two or four or more. It can be applied to the case and the same effect can be obtained. For example, in addition to the heating rollers 45 and 46 and the heating drum 61, the present invention can be applied to the case where the treatment liquid 31 is heated as a fourth heating object in order to accelerate the penetration into the transfer paper 10.

Although the offset belt 44 is used as the peeling member of the toner peeling unit 40 in the above embodiment, the supporting rollers 41, 42, 43, the offset belt 44, the lower heating roller 46, the guide roller 48, and the tension roller are used. In place of 49 or the like, a heating means such as a heating lamp is built in, and is composed of a material having a larger adhesive force than the adhesive force between the transfer paper 10 and the toner to the toner whose surface is at least softened. A peeling roller as a roller-shaped peeling member may be arranged so as to face the upper heating roller 45. In this case, the transfer paper 10 is conveyed while being held between the upper heating roller 45 and the peeling roller, passes through the holding portion, and then, when the transfer paper 10 separates from the surface of the peeling roller, Toner is peeled off and removed.

Further, in the above embodiment, the heating drum 61 with the built-in heating lamp 61a around which the paper pressing belt 63 is wound at a constant angle is used as the drying member of the drying unit 60. A pair of drying rollers having a heating means such as a heating lamp may be provided inside and the transfer paper 10 conveyed from the toner peeling unit 40 may be dried through the pair of drying rollers.

Further, in the above embodiment, the present invention is applied to the transfer paper 10 on which an image is formed by the transfer type electrophotographic copying machine, but it may be applied to other image forming apparatuses such as a facsimile, a printer and a printing machine. It can also be applied to an image carrier such as recording paper used. Further, the present invention is not limited to an image carrier having a fibrous structure, but can be applied to an image carrier capable of forming an image. The image carrier to which the present invention is applicable may be, for example, a laminate in which the surface layer of a base sheet such as a plastic layer is a material layer such as paper.

Further, in the above embodiment, the treatment liquid 31 is applied to the transfer paper 10, and then the toner on the transfer paper 10 is peeled and removed by the peeling roller 302, but the present invention uses the treatment liquid 31. Without using a toner removing device that removes toner without applying it, an offset belt 44, a peeling roller, or the like,
For example, an image forming substance removing device such as a toner removing device for scraping off the toner on the transfer paper 10 to remove the toner, which is also applicable to a device having a plurality of heating objects and a plurality of heating means for heating them. Is. Further, the present invention is not limited to the case where the image forming substance is the toner, but can be applied to the case where the image forming substance is another image forming substance such as ink.

[0059]

According to the invention of claim 1, the control reference time which is continuously repeated corresponds to each heating means for heating a plurality of heating objects including the softening member of the peeling means and the drying member of the drying means. Then, the heating means are divided into a plurality of control time zones so as not to overlap each other, and each heating means is controlled to be turned on or off during each control time zone, thereby independently controlling each heating means. Compared with the configuration in which the ON times overlap with each other, the instantaneous power consumption for all the heating means is reduced, and the power consumption can be suppressed to a predetermined value or less.

Furthermore, when the control reference time is divided into a plurality of control time zones corresponding to each heating means, the rate of temperature rise of the heating target object per unit time, the detected temperature of the heating target object before the start of control, etc. Based on the above, by dividing at a predetermined ratio, a plurality of heating objects such as a softening member and a drying member are used as compared with a case where the control reference time is equally divided into control time zones at the same distribution rate. There is an effect that the timings of reaching the possible temperatures can be brought close to each other.

Particularly, according to the invention of claim 2 or 3, the temperature difference between the detected temperature of each heating object and the control target temperature or the temperature ratio of the detected temperature to the control target temperature is calculated, and the temperature difference or According to the temperature ratio and the like, for example, by correcting the ratio of division of the control reference time into each control time period such that the control time period becomes longer as the temperature difference is larger or the temperature ratio is smaller, the peeling means There is an effect that the timing at which each heating target such as the softening member and the drying member of the drying means reaches the usable temperature can be brought closer.

In particular, according to the invention of claim 4, the temperature of each heating object is detected at a predetermined time interval, the temperature increase rate of each heating object is calculated from the plurality of detected temperatures, and Based on the calculation result of the temperature rise rate, by correcting the ratio of division of the control reference time into each control time zone so that the control time zone becomes shorter as the temperature rise rate increases, the softening member of the peeling means and the drying There is an effect that the timing at which each heating object such as the drying member of the means reaches the usable temperature can be brought closer.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a toner removing device according to an embodiment.

FIG. 2 is a block diagram of an electric part of the toner removing device.

FIG. 3 is a flowchart of temperature control of the toner removing device.

[Explanation of symbols]

10 Transfer Paper 20 Paper Feed Unit 30 Liquid Applying Unit 31 Treatment Liquid 40 Toner Peeling Unit 44 Toner Offset Belt 45 Upper Heating Roller 45a Heating Lamp for Upper Heating Roller 46 Lower Heating Roller 46a Heating Lamp for Lower Heating Roller 60 Drying Unit 61 heating drum 61a heating lamp for heating drum 70 paper receiving unit A ₄₅ detection temperature of upper heating roller A ₄₆ detection temperature of lower heating roller A ₆₁ detection temperature of heating drum T ₄₅ control time zone of upper heating roller T ₄₆ lower heating Roller control time zone T ₆₁ Heating drum control time zone

Claims (4)

[Claims] 1. A destabilizing liquid for imparting a destabilizing liquid to an image carrier having an image-forming substance stably attached to the surface thereof to make the adhered state of the surface and the image-forming substance unstable. An application means, a softening means for softening the image forming substance on the image carrier to which the destabilizing liquid is applied by directly or indirectly contacting the softening member, and the softened image forming substance and the peeling member. A peeling means for peeling and removing the image forming substance from the image holding member by bringing them into contact with each other and separating them, and the image holding member from which the image forming substance is removed is directly or indirectly brought into contact with a drying member to dry. In the apparatus for removing an image-forming substance from an image carrier, the temperature of each heating target is provided with a drying means for controlling the heating target and a plurality of heating means for heating each of the plurality of heating targets including the softening member and the drying member. Temperature detection means to detect The control reference time is divided into a plurality of control time zones corresponding to each heating means at a predetermined ratio, and each heating means is controlled for each control time based on the comparison result of the detected temperature of each heating object and the control target temperature. An apparatus for removing an image forming substance from an image carrier, which is provided with a control means for controlling to turn it on or off during the operation. 2. A control means for correcting the ratio of division of the control reference time into each control time zone based on the detected temperature of each heating object and the control target temperature. 1. An image forming substance removing device from the image carrier of No. 1. 3. A control for calculating a temperature difference between a detected temperature of each heating object and a control target temperature, and correcting the ratio of division of the control reference time into each control time zone based on the temperature difference. 3. An apparatus for removing an image-forming substance from an image carrier according to claim 2, further comprising means. 4. The temperature rise rate of each heating object is calculated from a plurality of detected temperatures detected at predetermined time intervals for each heating object, and the control reference time is calculated based on the calculation result of the temperature rising rate. 3. The apparatus for removing an image forming substance from an image carrier according to claim 1, further comprising control means for correcting the ratio of division into each control time zone.