JPH09212048A - Device for removing image forming substance from image holding body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an image holding body from being damaged in the case of separation by driving at least one of a peeling member, an interposing member and a press-contact member in forward and backward directions. SOLUTION: A driving roller 42 for driving a peeling belt 45 is controlled to be normally and reversely rotated by a means such as a stepping motor 50. The length of transfer paper 10 in a carrying direction is divided and the respective divided areas having the length are heated and pressed by a pressure roller 42 plural times each before separating the transfer paper 10 from the peeling member around a separation roller 43. By driving and normally and reversely rotating the roller 42 in such a way, toner is excellently transferred on the peeling member in the same manner as the plural pressure rollers are provided and the transfer paper is heated and transferred plural times, and the surface of the transfer paper is prevented from being damaged in the case of separating the transfer paper 10 from the peeling member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming substance removing device for removing an image forming substance from an image holding member having an image forming substance adhered to the surface thereof by an image forming device such as a copying machine, a facsimile machine or a printer. It is about.

[0002]

2. Description of the Related Art Heretofore, various methods and apparatuses have been known for reproducing a sheet material by removing an image-forming substance such as toner from a sheet as a recorded sheet material.
For example, as a method using a solvent, JP-A-1-10157 is used.
No. 6 discloses a method of removing an image forming substance by immersing a sheet on which a toner is attached in a soluble solvent of a toner resin and applying ultrasonic vibration to release the toner dissolved in the solvent from the surface of the sheet. . Further, in Japanese Unexamined Patent Publication No. 4-300395, 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, An image forming substance removing method is disclosed in which the image forming substance is removed by a method such as mechanical peeling or electrostatic adsorption.

Further, the present applicant has previously proposed that a recorded sheet material contains water as a destabilizing agent 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, which is heat-bonded or pressure-bonded to a member and separated from a sheet material, has been proposed (for example, Japanese Patent Application No. 4-255916).
No.). According to this, only the image forming substance can be removed without relatively damaging the paper quality of the sheet material.

[0004]

However, according to this configuration, when a paper having a weak paper strength such as recycled paper is used, it is difficult to separate the paper from the peeling member, and the paper is forcibly peeled off. If so, there is a problem that fibers under the toner image of the paper adhere to the peeling member, and the surface of the paper after the processing is roughened (hereinafter, referred to as defective printing).

Therefore, the present applicant previously put the untreated paper between a pair of sheet release materials, and passed the heating roller device as a heating and pressurizing device arranged in series to pass the untreated paper on the untreated paper. We proposed a device for removing an image-forming substance from an image carrier, which removes toner by repeating transfer of a toner image little by little onto a release material and reduces damage to the surface of paper.

However, in the apparatus according to this proposal, a large number of heating roller pairs are arranged in series, so that the machine becomes large in size, complicated, power consumption is large, and cost is high.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an apparatus for removing an image-forming substance from an image carrier having a simple structure and less paper damage. .

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 makes it possible to prevent the adhesion state between the image forming surface of the image carrier and the image forming substance adhered to the image forming surface. Liquid applying means for applying a destabilizing liquid to the image carrier to make it stable, and the image forming substance and the image carrier with respect to the image forming substance on the image carrier to which the destabilizing liquid is applied. After the peeling member capable of exerting a larger adhesive force than that between the image holding member and the image forming surface of the image holding member is contacted, the image holding member and the peeling member are separated from each other, and the surface of the image holding member is separated. And a peeling means for peeling the image-forming substance from the image-forming substance to the image-forming substance removing device from the image carrier. Part for holding at least a part of the image carrier together with the peeling member A pressing member for pressing the peeling member and the image holding member against each other in a part of the contact portion, and at least one of the peeling member, the holding member and the pressing member in the forward and reverse directions. The driving means that can be driven, and the driving means so that the peeling member and at least a part of the image holding member are brought into pressure contact with the pressing member a plurality of times before the part is separated from the peeling member. And a drive control means for controlling.

In this image forming substance removing apparatus, at least one of the peeling member, the holding member and the pressure contact member is driven in the forward direction and the reverse direction by the driving means to move the peeling member and the image. At least a part of the holding body is pressed by the pressing member a plurality of times before the part is separated from the peeling member.

According to a second aspect of the present invention, in the apparatus for removing an image-forming substance from an image carrier according to the first aspect, the peeling member and at least a part of the image carrier are partially discharged from the contact portion. It is characterized in that the drive control means is configured so that the pressing member is pressed a plurality of times before being pressed.

In this image forming substance removing apparatus, at least one of the peeling member, the holding member and the pressure contact member is driven in the forward direction and the reverse direction by the driving means to move the peeling member and the image. At least a part of the holding body is pressed by the pressing member a plurality of times before the part is discharged from the contact portion.

According to a third aspect of the present invention, in the apparatus for removing an image-forming substance from an image carrier according to the first or second aspect, at least one of the peeling member, the sandwiching member and the pressing member is driven by the driving means. , The other members are configured to be driven, and a pressurizing state in which the pressurizing member pressurizes and a depressurized state in which the pressurizing force of the pressurizing member is reduced or eliminated can be selectively obtained. Thus, a moving means for moving at least one of the pressure contact member and the peeling member is provided, and at least one of the peeling member, the sandwiching member and the pressure contact member is either forward or reverse by the driving means. Or a control means for controlling the moving means so that a pressurized state is obtained when driven in one direction and a depressurized state is obtained when driven in another direction. It is an.

In this image forming substance removing apparatus, at least one of the peeling member, the sandwiching member and the pressing member is driven by the driving means, and the other members are the image holding member and the image holding member from the driven member. The shearing force is transmitted via the forming material and follows. And, since at least one of the peeling member, the sandwiching member, and the pressing member is driven by the driving means in either one of the forward direction and the reverse direction, the pressurizing state is set. The shear force between the inside of the image forming substance and between the image forming substance and the image carrier, which is increased in a pressure state where the adhesive force of the peeling member is increased, is generated when the driven member is driven in the other direction. It is not canceled by the reverse shearing force that occurs.

According to a fourth aspect of the present invention, in the image forming substance removing device from the image carrier according to the first or second aspect, the peeling member or the sandwiching member is driven by the driving means, and the other one is driven. One of the peeling member or the sandwiching member by means of the load applying means for selectively applying a load state for applying a load to the driven member and an unloaded state for removing the load. And a control means for controlling the load applying means so as to take the load state when driven in one of the forward direction and the reverse direction and take the no-load state when driven in the other direction. , Are provided.

In this image forming substance removing apparatus, when one of the peeling member and the sandwiching member is driven in the forward direction or the reverse direction by the driving means, the load state is changed to the other direction. When driven, it takes the above-mentioned no-load state. In the loaded state, the shearing force generated inside the image forming material and between the image forming material and the image carrier is further increased by applying a load to the driven member. Further, the shearing force is not canceled by the reverse shearing force generated when the driven member is driven in the other direction.

According to a fifth aspect of the present invention, in the apparatus for removing an image-forming substance from an image carrier according to the first or second aspect, the peeling member and the sandwiching member are arranged in at least one of a forward direction and a reverse direction. The driving means is configured to be driven simultaneously, and when driven in one direction of the forward direction or the reverse direction, the peeling member and the sandwiching member are simultaneously driven by the driving means with a speed difference therebetween, It is characterized in that it is driven so as not to cause a speed difference when it is driven in the other direction or the opposite direction.

In this image forming substance removing apparatus, when driven in one direction of the forward direction or the reverse direction, the peeling member and the sandwiching member are simultaneously driven with a speed difference from each other by the driving means. When it is driven in the other of the direction and the reverse direction, it is driven so that there is no speed difference. At this time, the shearing force generated inside the image forming material and between the image forming material and the image carrier is further increased by providing the driving speed difference. Further, the shearing force is not canceled by the reverse shearing force generated when the driven member is driven in the other direction.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a heat-melting toner (hereinafter referred to as toner) as an image forming substance is transferred from a transfer paper as an image carrier on which an image is formed by a transfer type electrophotographic copying machine. An embodiment applied to a device for removing an image forming substance from an image carrier to be removed (hereinafter referred to as a toner removing device) will be described.

[First Embodiment] First, an outline of a toner removing device according to a first embodiment will be described. In FIG.
The toner removing device is configured to feed the transfer papers 10 on which the toner images are formed, which are housed in a stacked state, separately and separately, and to the transfer papers 10 sent from the paper feed unit 20. A liquid supply unit 30 as a liquid supply device for supplying the stabilizing liquid 31, and the transfer paper 10 to which the liquid is supplied.
Toner peeling unit 40 as a peeling unit that peels toner from the sheet, a drying unit (not shown) that dries the transfer paper 10 from which toner has been removed, and a sheet (not shown) that receives the transfer paper 10 discharged from the drying unit. And a receiving unit.

The sheet feeding unit 20 separates the transfer sheet 10 set on the sheet feeding table 23 with the surface on which the toner image is formed (hereinafter referred to as a toner image surface) facing down, from the separation roller 21.
Are separated one by one by the registration roller 22
Is supplied to the liquid supply unit 30 at a predetermined timing by, for example, the same as a paper feed unit in an electrophotographic copying machine.

The liquid supply unit 30 does not adhere to the surface of the transfer paper 10 and the toner, which is made of water or an aqueous solution containing a surfactant to improve the permeability of the transfer paper 10 to the transfer paper 10. Destabilizing liquid 3 as a stabilizing liquid
1 for supplying the destabilizing liquid 31 to the transfer paper 10.
And a coating roller 33 that is provided so as to be partially submerged in the liquid in the liquid container 32 and that pumps the liquid by rotation and supplies it to the toner image surface of the transfer paper 10.
And a regulation roller 34 as a paper regulation member provided so as to face the coating roller 33 with the paper conveyance path interposed therebetween.
A liquid tank 35 for storing the destabilizing liquid 31 to be supplied to the liquid container 32, a supply pipe 36 for supplying the destabilizing liquid 31 from the liquid tank 35 into the liquid container 32, and a liquid supply pump 37. And a recovery pipe 38 for recovering the excess destabilizing liquid 31 in the liquid container 32 into the liquid tank 35.

In the liquid supply unit 30, the liquid tank 35 is provided in the lower part of the apparatus, and the liquid tank 35
A supply pipe 36 having a tip portion submerged in the destabilizing liquid 31 extends vertically, and a liquid supply pump 37 is attached in the middle thereof so that the destabilizing liquid 31 can be pumped upward. The supply pipe 36 is at the upper side, and the liquid supply unit 3
It is refracted toward the upper surface side of the liquid container 32 of 0 and opens toward the liquid surface in the liquid container 32. The liquid container 32 is provided therein with a partition plate 32a formed lower than the container side plate, and the destabilizing liquid 31 supplied from the supply pipe 36 is stored in one of the partition plates 32a. The coating roller 33 is partially submerged in the portion where the coating is applied.
The recovery pipe 38 is provided on the other bottom surface of the partition plate 32a.
Are connected.

With the above structure, the destabilizing liquid 31 in the liquid tank 35 is sucked up by the liquid supply pump 37 and is supplied to one of the partition plates 32a in the liquid container 32 through the supply pipe 36. When the bulk of the destabilizing liquid 31 exceeds the height of the partition plate 32a, the destabilizing liquid 31 overflows, passes through the recovery pipe 38, and again enters the liquid tank 35.
Is to be returned to.

The toner peeling unit 40 is wound around a supporting roller 41, a driving roller 42, and a separating roller 43, and is closely wound around points A to B on the peripheral surface of a heating drum 44 having a heater 44a. Endlessly moving the peeling belt 45, and a pressure roller 46 with a built-in heating lamp 46a provided so as to press the heating drum 44 with the peeling belt 45 interposed therebetween to form a peeling nip P.
A belt cleaning device 47 for removing toner from the surface of the peeling belt 45 and a pair of transport rollers 48 for transporting the transfer paper 10 from which toner has been removed to a drying unit. Here, the drive roller 41, the support roller 42, the separation roller 43, the heating drum 44, the peeling belt 45, and the pressure roller 46 function as a conveyance unit that conveys the transfer paper 10.

As the heating drum, for example, a metal such as aluminum covered with a material having good heat resistance and releasing property such as fluororesin may be used. In the present embodiment, the heating drum 44 follows the moving direction of the peeling belt. A material such as low hardness silicon rubber may be used for at least the surface of the pressure roller 46. Further, at least the surface of the peeling belt 45 has an adhesive force to the softened toner that is larger than the adhesive force between the surface of the transfer paper 10 and the toner, PET, PC, PEEK,
It is made of a synthetic resin material such as PI.

The separation roller 43 at the outlet of the peeling unit 40, which also serves as a supporting roller for the peeling belt 45, rapidly changes the moving direction of the peeling belt 45 to separate the curvature of the transfer paper 10 from the peeling belt 45. I am supposed to do it.

The heating drum 44 and the pressure roller 46 adhere the toner image surface of the transfer paper 10 sent from the liquid supply unit 30 to the peeling belt 44 and fix the transfer paper 10 to the transfer paper 10. The toner is heated to soften it.

The belt cleaning device is designed to remove toner from the peripheral surface of the belt and store the removed toner in the unit casing. Detailed operation of the peeling unit 40 will be described later.

The above-mentioned drying unit uses, for example, the transfer paper 10 so that the liquid holding amount of the transfer paper 10 is 10% or less of the paper weight.
The heating drum, which is made of, for example, aluminum and has a built-in heating lamp, is wound around a plurality of support rollers and a driving roller, and moves endlessly while being wound around the peripheral surface of the heating drum at a constant angle. It is composed of a paper pressing belt. As a material of the paper pressing belt, a material having heat resistance and air permeability, for example, cloth such as canvas, cotton, and Tetoron can be used. (Hereinafter, margin)

The paper receiving unit is a separation roller for curvature-separating the transfer paper 10 that has passed through the holding region between the heating drum and the paper pressing belt in the drying unit, and a paper discharge roller for discharging the transfer paper. A pair and a discharge tray (not shown) for accommodating the transfer sheet 10 sent from the pair of discharge rollers can be used.

In the above structure, the destabilizing liquid 31 is uniformly supplied to the toner image surface of the transfer paper 10 sent from the paper feeding unit 20 by the liquid supply unit 30, and sent to the toner peeling unit 40. Toner peeling unit 40
The toner adhered to the transfer paper 10 is removed by the peeling belt 45.
At the nip portion P between the pressure roller 46 and the pressure roller 46, it is heated and softened, and adheres to the surface of the peeling belt 45. When the transfer paper 10 and the peeling belt 45 are separated around the separation roller 43, the toner adhering to the surface of the peeling belt 45 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 is dried by the drying unit 60 and discharged to the paper receiving unit.

In this embodiment, the structure is simple, the paper is less damaged, and the toner removability is satisfactory. Hereinafter, this configuration operation will be described.
In the present embodiment, the drive roller 42 that drives the peeling belt 45 is controlled in the forward and reverse directions by a means such as a stepping motor 50, and the length of the transfer paper 10 in the transport direction is divided into lengths l1 to separate the separation roller 43. Transfer paper around 10
Before separating the peeling member from each other, each region having the length l1 is heated and pressed by the pressure roller 46 a plurality of times. For example, when the pressure roller 46 heats and presses each area of the length l2 twice, first, the peeling belt 45 is controlled to move forward at a speed v1 as shown in FIG. The transfer paper 1 preheated after a predetermined time elapses after the transfer paper detection sensor 51 provided at the entrance of the unit 40 outputs the passage of the leading end of the transfer paper 1
When the leading edge of 0 reaches the peeling nip P, the peeling belt 45 moves backward at a speed v2 as shown in FIG. That is, the driving speed of the peeling belt 45 at this time is, as shown in FIG. 2B, a time t1 driven at a speed v1 and a time t2 driven at a speed v2 alternately repeated,
It may be controlled so that v1 · t1 = 2 · v2 · t2 = 2 · 11. By driving the drive roller 42 in the forward and reverse directions in this manner, the toner can be transferred to the peeling member as well as the case where a plurality of pressure rollers are provided and a plurality of heat press contacts are performed, and the transfer paper 10 is separated from the peeling member. It is possible to prevent damage to the paper on the surface of the transfer paper during separation. Further, since the peeling belt 45 and the heating drum 44 sandwich the transfer paper 10 in the contact area, the peeling liquid does not evaporate during the forward movement and the backward movement of the peeling belt. For this reason, the surface of the transfer paper is not easily damaged, the toner can be satisfactorily removed, and the evaporated stripping liquid does not cause trouble inside or outside the apparatus. Note that the example of FIG. 2 is an example of the case where the transfer paper 10 is heated and pressed twice each time, but the toner can be removed better by heating and pressing three times or more.

Further, in this embodiment, a pressure roller contact / separation mechanism 60 is provided, and the pressure roller 46 and the peeling belt 45 are provided.
Are configured so that they can be brought into pressure contact with each other or separated from each other. Hereinafter, this pressure roller contact / separation mechanism 60
An example will be described with reference to FIG.

As shown in FIG. 3, the pressure roller contact / separation mechanism 60 supports the pressure roller 46 via a bearing 61, and is rotatable about a fixed pin 62. A pressure spring 64 for urging a force to rotate in a clockwise direction, a cam follower 65 provided on the pressure arm 63, an eccentric cam 66 for pushing up the cam follower 65, and a motor for rotating the eccentric cam 66. 6
7. A control unit (not shown) for controlling whether or not to drive the motor 67 is configured as a control unit. The pressure roller 46 is normally pressed against the heating drum 44 via a pressure arm 63 that is urged clockwise by the urging force of the pressure spring 64.

In the pressure roller contact / separation mechanism 60,
When the motor 67 is driven under the control of the control unit, the eccentric cam 66 rotates. Then, the cam follower 65 that is in contact with the eccentric cam 66 is displaced by the rotation angle of the eccentric cam 66, and the pressure arm 63 provided with the cam follower 65 swings around the fixed pin 62.
In this way, the position of the pressure arm 63 changes depending on the rotation angle of the eccentric cam 66, and the pressure roller 46 supported by the pressure arm 63 takes the separated position and the pressure contact position with respect to the peeling belt 45. sell.

Then, the pressure roller 46 is attached to the peeling belt 45.
When separating from the pressure contact position of
By rotating the motor 67 to a rotation angle at which the eccentricity is maximized, the pressure arm 63 is swung counterclockwise against the urging force of the pressure spring 64. The pressure roller 46 and the peeling belt 45 are separated from the pressure contact position by a predetermined gap C. Further, when the pressure roller 46 is returned from the separated state to the pressure contact state, the motor 67 is driven to drive the eccentric cam 6.
By rotating 6 about half a rotation angle from the position where the eccentricity is the largest, the pressing arm 63 is swung clockwise around the fixed pin 62 by the urging force of the pressing spring 64, The pressure roller 46 is pressed against the peeling belt 45 again.

Then, the control section, when starting the reverse rotation of the drive roller 42 by the stepping motor,
Prior to this, the drive of the motor 67 is started, and the pressure roller 46 is set at the separated position from the peeling belt 45 as described above. The timing for starting this driving is, for example, the transfer paper detection sensor 5 provided at the entrance of the peeling unit 40.
It can be set after a predetermined time elapses after 1 outputs the leading edge of the transfer paper.

FIG. 4 is an explanatory view of the operation when the transfer paper 10 is processed n times. When a predetermined time elapses after the transfer paper detection sensor 51 provided at the entrance of the peeling unit 40 outputs that the transfer paper has passed the front end, the front end of the transfer paper 10 is moved to the position shown in FIG.
As shown in (a), the peeling nip P is reached. afterwards,
The peeling belt 45 is further advanced to move the transfer paper 10 to the position shown in FIG.
As shown in (b), advance by the length l in the carrying direction. At this time, the pressure roller 46 is in pressure contact with the peeling belt 45, and when the toner on the transfer paper 10 adheres to the peeling belt 45, the inside of the toner from the toner surface, the interface between the toner and the transfer paper 10 from the inside of the toner, and the toner. The shear force is transmitted from the interface of the transfer paper 10 to the inside of the transfer paper 10, and from the inside of the transfer paper 10 to the interface between the transfer paper 10 and the heating drum 44, that is, the surface of the heating drum 44, and the drum is driven. Further, the toner is transferred by this shearing force and is slightly displaced from 10.

Next, the peeling belt 45 is retracted, and the transfer paper 10 is returned by 1 as shown in FIG. 4 (c). At this time, since the pressure roller 46 is separated from the peeling belt by the pressure roller contact / separation mechanism, a reverse shearing force is not applied to the toner and the toner does not return to its original state. Then, again while the pressure roller 46 is pressed against the peeling belt by the pressure roller contacting / separating mechanism, the peeling belt is advanced by 1 as shown in FIG. 4D, and the second peeling is performed in the same manner as the above method. I do.

Then, as shown in FIG. 4 (e), after peeling n times to complete the toner removal processing of the portion 1 from the leading edge of the paper, the peeling belt 45 is pressed against the peeling belt 45. 4 is moved forward, the transfer paper 10 is further advanced by 1 as shown in FIG. 4 (f), and the separation belt is retracted while separating the pressure roller 46 from the separation belt 45.
The operation of returning the transfer paper 10 by 1 as shown in (g) is repeated. By the above operation, as shown in FIG. 4 (h), the transfer paper 10 is divided into m sections in the conveying direction, and the processing of repeating the normal and reverse feeding n times for each division to remove the toner ends.

According to the above embodiment, the toner and the transfer paper 1 are
Since the shearing force works only in one direction and does not work in the opposite direction between 0, the shearing force acting in one direction is not canceled or weakened, and the toner is gradually transferred to the transfer paper 1.
It can be peeled from zero. For this reason, the surface of the transfer paper 10 is not roughened, and the adhesive force between the toner and the transfer paper is weakened, so that the toner can be satisfactorily removed.

Further, in the above embodiment, when the peeling belt 45 is moved forward, for example, an electromagnetic brake means or the like is used for the heating drum 44 to apply a load to make it difficult to follow, and to release the load when moving backward. Any configuration may be adopted. In this case, when the peeling belt 45 is moved forward, the heating drum lacks a load and is less likely to be driven, so that the shearing force is further increased and the toner can be removed from the transfer paper 10 more favorably.

Further, in the above embodiment, the heating drum 44 is configured to follow the peeling belt 45, but at a speed different from the conveying speed of the peeling belt 45 at least only when the peeling belt is advanced. Heating drum 45
May be configured to be driven. In this case, since the heating drum rotates at different speeds when the peeling belt 45 is moved forward, the shearing force is strengthened, and the toner can be removed from the transfer paper 10 better.

[Second Embodiment] In the first embodiment, an example in which the transfer paper 10 is sandwiched between the peeling belt 45 and the heating drum 44 has been described, but as shown in FIG. 5, the transfer is performed by the upper and lower conveyor belts 141 and 142. A configuration in which the paper 10 is sandwiched may be adopted. In this case, at least the lower conveyance belt 142 on the side of the transfer paper 10 which is in close contact with the toner image is formed in the same manner as the above-mentioned peeling belt 45. Further, the lower conveyance belt 142 is driven by a drive roller 144 whose forward / reverse control is controlled by a motor 143. Also,
Pressure roller 1 with built-in heating lamp in the upper and lower belt loops
45 and 146 are provided so as to face each other to form a peeling nip P. At this time, it is preferable that one pressure roller can be brought into contact with and separated from the other pressure roller. Further, in the example of FIG. 5, since the upper and lower conveyor belts 141 and 142 are in close contact with each other from the point A ′ to the point B ′, the destabilizing liquid may evaporate during the forward and backward movement of the lower conveyor belt. The peeling can be performed satisfactorily.
According to this embodiment, the transfer paper 10 can be heated and pressed a plurality of times with the same simple structure as in the case of the first embodiment, and the toner can be satisfactorily removed. Further, when the lower conveyance belt 142 is fed in the reverse direction, the pressure roller that can be contacted and separated is separated from the other, so that the shearing force acts between the toner and the sheet in only one direction, and the toner can be removed more favorably. . Further, by implementing a mechanism for applying and releasing a load to the upper transport belt 141, or by driving the upper transport belt at a speed different from the transport speed of the lower transport belt 142 only when the lower transport belt 142 is moving forward, As in the case of the form 1, the shearing force can be strengthened and the toner can be removed satisfactorily.

In each of the first and second embodiments, an example is described in which a shearing force is generated between the toner and the transfer paper 10 when the peeling belt is sequentially fed. The same effect can be obtained even if the operation at the time is configured to be reversed and the shearing force is generated between the toner and the transfer paper 10 when the peeling belt is fed back.

[0046]

According to the present invention, the driving means drives at least one of the peeling member, the holding member and the pressure contact member in the forward direction and the reverse direction to cause the peeling. A member and at least a part of the image carrier are pressed multiple times by the pressing member before the part is separated from the peeling member, thereby preventing damage to the image carrier at the time of separation. It has the excellent effect of being able to. Further, there is an excellent effect that the structure is simple and the device can be downsized and the cost can be reduced.

According to the second to fifth aspects of the present invention, at least one of the peeling member, the holding member and the pressure contact member is driven in the forward direction and the reverse direction by the driving means to move the peeling member. Since at least a part of the image carrier is pressed a plurality of times by the pressing member before the part is discharged from the contact portion, the destabilizing liquid evaporates during the plurality of press contacts. The image-forming substance can be gradually peeled off from the image carrier in a state where the destabilizing liquid is sufficiently applied without causing any trouble inside the apparatus, preventing the image carrier from being damaged and improving the image quality. There is an excellent effect that the forming substance can be peeled off.

Further, according to the invention of claim 3, when at least one of the peeling member, the sandwiching member and the pressing member is driven by the driving means in either one of the forward direction and the reverse direction. Since only the pressurizing state is taken, the shearing force inside the image forming substance and between the image forming substance and the image holding body, which is increased in the pressurizing state in which the adhesive force between the image forming substance and the peeling member is strengthened, is driven by the driving force. It is not canceled by the reverse shearing force generated when the member is driven in the other direction. Therefore, the shearing force in only one direction acts between the image-forming substance and the image carrier to allow the image carrier to be peeled off little by little, preventing damage to the image carrier and
Further, there is an excellent effect that the image forming substance can be peeled off satisfactorily.

According to the invention of claim 4, in the above-mentioned loaded state, a shear is generated in the inside of the image forming substance and between the image forming substance and the image holding member by applying a load to the driven member. The force is further increased, and the shearing force is not canceled by the reverse shearing force generated when the driven member is driven in the other direction, so that the image forming substance is better removed. It has the excellent effect of being able to.

Further, according to the invention of claim 5, when the peeling member and the sandwiching member are driven in one direction of the forward direction or the reverse direction, a driving speed difference is imparted to the inside of the image forming substance and the image. The shearing force generated between the forming substance and the image carrier is further increased, and the shearing force is not canceled by the reverse shearing force generated when the driven member is driven in the other direction. Therefore, there is an excellent effect that the image forming substance can be removed more favorably.

[Brief description of drawings]

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

FIG. 2A is an operation explanatory view of a peeling belt of the toner removing device. (B) An explanatory view of the operation of the peeling belt when heating and pressing are performed twice in the peeling nip of the toner removing device.

FIG. 3 is an explanatory view of a pressure roller contact / separation mechanism of the toner removing device.

FIG. 4 is an explanatory view of peeling in a peeling unit of the toner removing device.

FIG. 5 is a front view showing a schematic configuration of a peeling unit according to another embodiment.

[Explanation of symbols]

 10 Transfer Sheet 20 Paper Feed Unit 30 Liquid Supply Unit 40 Toner Peeling Unit 41 Support Roller 42 Drive Roller 43 Separation Roller 44 Heating Drum 44 44a Heater 45 Peeling Belt 46 Pressure Roller 46 46a Heating Lamp 47 Belt Cleaning Device 48 Conveying Roller Pair 50 Stepping motor 51 Transfer paper detection sensor 60 Pressure roller contact / separation mechanism 61 Bearing 62 Fixed pin 63 Pressure arm 64 Pressure spring 65 Cam follower 66 Eccentric cam 67 Motor 141 Upper conveyance belt 142 Lower conveyance belt 143 Motor 144 Drive Roller 145 Pressure roller 146 Pressure roller

Claims (5)

[Claims] 1. A liquid applying means for applying a destabilizing liquid to the image holding member, which makes the adhesion state of the image forming surface of the image holding member and the image forming substance attached to the image forming surface unstable. And a peeling member capable of exhibiting a larger adhesive force than the adhesive force between the image forming substance and the image holding member to the image forming substance on the image holding member to which the destabilizing liquid is applied. From an image carrier, which comprises a peeling means for separating the image carrier from the peeling member after contacting the image forming surface of the image carrier and peeling the image forming substance from the surface of the image carrier. In the image forming substance removing device, a holding member which holds the peeling member in contact with the peeling member over a certain length in the transport direction to form a close contact portion, and holds at least a part of the image carrier together with the peeling member in the close contact portion. And the peeling member and the image carrier in a part of the contact portion. A pressure contact member to be in pressure contact with each other, a driving unit capable of driving at least one of the peeling member, the holding member, and the pressure contact member in a forward direction and a reverse direction, and at least a part of the peeling member and the image carrier. And a drive control unit that controls the drive unit so that the part is separated from the peeling member before being pressed by the pressing member a plurality of times. Image forming substance removing device. 2. The apparatus for removing an image-forming substance from an image carrier according to claim 1, wherein the peeling member and at least a part of the image carrier are discharged before the part is discharged from the contact portion.
An apparatus for removing an image forming substance from an image carrier, characterized in that the drive control means is configured so that the pressing member is pressed a plurality of times. 3. The apparatus for removing an image forming substance from an image carrier according to claim 1 or 2, wherein at least one of the peeling member, the sandwiching member and the pressing member is driven by the driving means, and other members are The pressure contact is constituted so that the pressure contact is performed by the pressure contact member, and the pressure contact of the pressure contact member can be selectively reduced between the pressure applied state and the pressure released state. A moving means for moving at least one of the peeling member and the peeling member is provided, and at least one of the peeling member, the sandwiching member and the pressure contact member is driven by the driving means in either one of a forward direction and a reverse direction. An image carrier characterized in that it is provided with a control means for controlling the moving means so as to take a pressure state when being driven in the other direction and take a pressure release state when being driven in another direction. Image forming substance removing apparatus. 4. The apparatus for removing an image forming substance from an image carrier according to claim 1 or 2, wherein the peeling member or the sandwiching member is driven by the driving means, and the other one is driven. One of the peeling member and the sandwiching member is moved forward or reversely by the load applying means that can selectively take a load state in which a load is applied to the driven member and a no-load state in which the load is removed. And a control means for controlling the load applying means so as to take the above-mentioned load state when driven in one of the directions and the above-mentioned no-load state when driven in the other direction. An image forming substance removing device from an image carrier. 5. The apparatus for removing an image forming substance from an image carrier according to claim 1 or 2, wherein the peeling member and the sandwiching member are simultaneously driven by the driving means in at least one of a forward direction and a reverse direction. When it is driven in one direction of the forward direction or the reverse direction, the peeling member and the sandwiching member are simultaneously driven with a speed difference from each other by the driving means, and the forward direction or the reverse direction is driven. An image forming substance removing device from an image carrier, which is driven so as not to cause a speed difference when driven to the other side.