JPH0962155A - Image forming substance removal device - Google Patents

Abstract

(57) Abstract: Excess liquid from the image carrier after application of the liquid, which is squeezed by the pressure at the nip between the image carrier pressing means and the image forming material peeling member, is the image carrier. To provide an apparatus for removing an image-forming substance from an image carrier, which can prevent an end portion of a pressing unit from going around. A foaming member 700 molded in a ring shape is attached to a longitudinal end portion of a heating roller 315 whose surface portion is formed of an elastic layer. The foam member 700 may be integrally formed with the heating roller 315, or may be attached later by adhesion or press fitting. The foam member 70
When 0 is provided on the heating roller 315, the foam member 700
Is made of a heat-resistant material such as silicone rubber or fluororubber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reproduces an image carrier by removing the image forming substance from a recorded image carrier having an image forming substance adhered to the surface thereof by an image forming apparatus such as a copying machine, a facsimile machine or a printer. In order to achieve this, the present invention relates to an image forming substance removing device for an image carrier, which performs at least a liquid application process on the image carrier.

[0002]

2. Description of the Related Art Various methods and apparatuses for regenerating an image carrier by removing an image forming substance such as toner from a sheet serving as a recorded image carrier have been known. For example, a method using a solvent is disclosed in
JP-A-576-576 discloses a method of removing an image-forming substance in which a sheet on which toner is adhered is immersed in a soluble solvent of a toner resin, and ultrasonic vibration is applied to release the toner dissolved in the solvent from the paper surface. . Also, JP-A-4-30039
No. 5 discloses that a solvent is applied to a printed portion of waste paper by immersion, spraying, coating or the like to dissolve the toner, and the dissolved toner is washed, air suctioned, adsorbent contacted, mechanically peeled or electrostatically adsorbed. A method for removing an image forming substance is disclosed.

Further, the applicant of the present invention previously mentioned that the recorded image bearing member contains water as a destabilizing agent and an aqueous solution containing a surfactant,
An aqueous solution containing a water-soluble polymer, and at least one kind of water or an aqueous solution selected from the group consisting of an aqueous solution containing a surfactant and a water-soluble polymer are held, and a peeling member is interposed therebetween to peel off the image forming substance. A method for removing an image forming substance which is separated from an image carrier by heating or pressure bonding to a member 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 image carrier.

As described above, in the case where at least a liquid application process is performed on the image holding member to remove the image forming member from the image holding member having the image forming substance attached to the surface and replay the image holding member, the regenerating operation is performed. For convenience of later handling, it is desirable to remove the liquid adhering to the image carrier and dry the image carrier after removing the image-forming substance.

Therefore, a destabilizing liquid application means for applying a liquid to the image carrier having the image-forming substance adhered to the surface thereof to provide a destabilizing liquid that makes the adhesion between the surface and the image-forming substance unstable. And an image forming substance peeling means for separating the surface and the peeling body from each other after bringing the peeling body having an adhesion force larger than the surface of the image forming substance into contact with the image forming substance on the surface. It has been proposed that an image carrier reproducing apparatus having the above-mentioned means be provided with a means for drying the image carrier after peeling the image forming substance (see, for example, Japanese Patent Application No. 5-269873).

[0006]

SUMMARY OF THE INVENTION However, in order to reproduce an image holding member by removing the image forming substance from the image holding member having the image forming substance adhered to the surface thereof, at least a liquid applying process is performed on the image holding member. Means and heating means for heating the image carrier in the state where the liquid remains attached, and the surface is driven so as to move endlessly in a closed path including a region in contact with the image carrier in the state. An image holding member pressing member having a heating device inside, which is arranged on the side facing the heating unit through the image forming substance peeling member and the image holding unit so as to press the image holding unit toward the heating unit side. In the image forming substance removing device for the image holding member including the means, there is a problem that waviness occurs at the end of the image holding member after drying.

As a result of extensive studies on the cause of this problem, in the pre-drying stage of the image carrier, the water content at the edge of the image carrier to which the liquid has been applied is higher than that at the central part. Due to such a difference in water content, the expansion of the image carrier varies and stress is applied to the image carrier, so that it was found that waviness occurs in the stressed part.

That is, the amount of water contained in the image carrier after the image-forming substance is removed from the image carrier is larger in both end portions than in the central portion. As shown in FIG. 5, this is because the wet surface of the image carrier 10 on which the image forming material is attached is brought into contact with the image forming material separating member 44, and the separating member is separated from the image forming member 10 by the action of heat and pressure. When the image-forming substance is transferred to the 44 side, a small amount of water contained in the image carrier 10 is squeezed out as excess liquid from the entrance side of the contact portion. Then, the squeezed excess liquid is used as the image carrier 1.
On the entry side of 0, it accumulates in a wedge-shaped space formed by the peeling member 44 and the pressing means 315, further moves to the end portion of the pressing means 315 indicated by symbol A in the figure, and exits the image carrier 10. By wrapping around, the toner adheres to the longitudinal end portion B on the passage side of the contact portion of the image carrier 10.

When paper, for example, is used as an image carrier having a liquid absorbing property at least on its surface, it has the property of expanding when it contains water and contracting when it is dried. Therefore, when a difference in water content occurs in the same paper, the expansion of the paper varies depending on the difference and stress is applied to the paper, so that the portion where the stress is generated is wavy.

If the drying means dries it while the wavy state is generated, a problem occurs that the wavy state remains or wrinkles occur in the finish of the paper dried by the drying means. There was a point. Then, when the image carrier with this defect still being reused in the image forming apparatus, when the paper is pinched and conveyed in the image forming apparatus, the wavy paper becomes wrinkled or wrinkled. Poor transportation may occur.

The present invention has been made in view of the above problems, and it is an object of the present invention that the image carrier after application of the liquid is a nip portion between the image carrier pressing means and the image-forming substance peeling member. The excess liquid squeezed by being pressed is prevented from wrapping around from the end of the image holding member pressing means, and the excess liquid does not reattach to the image holding member after passing through the nip portion. Thus, it is an object of the present invention to provide an image forming substance removing apparatus capable of maintaining a high quality finished state of an image carrier after drying.

[0012]

In order to achieve the above object, an image forming substance removing device according to a first aspect of the present invention is an image holding member having a liquid absorbing property on at least a surface portion of the image forming substance adhered to the surface thereof. Liquid applying means for applying a liquid that makes the adhesion between the surface and the image-forming substance unstable, heating means for heating the image carrier in a state where the liquid is still adhered, and the surface The image forming material peeling member driven so as to move endlessly in a closed path including a region in contact with the image holding member, and the image holding member on the side facing the heating unit via the image holding member An image forming material removing device for an image holding body, comprising an image holding body pressing means arranged so as to be pressed to the means side, in a nip portion between the image holding body pressing means and the image forming material peeling member. When pressed, it is squeezed out of the image carrier after applying the liquid. Backing prevention means for preventing excess liquid from backing from the intrusion side to the exit side of the nip portion in the image carrier conveying direction is provided at both ends in the longitudinal direction of the image carrier pressing means. It is what

In the image forming substance removing apparatus according to the present invention, when the image holding member after applying the liquid passes through the nip portion between the image holding member pressing means and the image forming material peeling member, the image holding member is removed. Excess liquid squeezed from the pool is stored in the space formed by the image holding member pressing means and the image forming substance peeling member on the intrusion side of the image holding member, and further on the end side of the image holding member pressing means. Moving. Then, the backing prevention means provided at both ends in the longitudinal direction of the image holding member pressing means prevents the excess liquid from backing to the outlet side of the image holding member.
This prevents excessive liquid from the image carrier squeezed in the nip portion from re-adhering to the end portion side of the image carrier after passing through the nip portion.

In particular, the image-forming substance removing device according to claim 2 is
In the image forming substance removing apparatus according to claim 1, the backing prevention means is configured by using a foaming member having foamability.

In the image forming substance removing apparatus according to the present invention, the foaming member having a foaming property as the backing preventing means efficiently absorbs the excess liquid which has moved to the end portion side of the image carrier, and the excess liquid is removed. The liquid is prevented from reattaching to the image carrier after passing through the nip portion.

In particular, the image-forming substance removing device according to claim 3 is
The image forming substance removing apparatus according to claim 2, wherein the surface of the foaming member that is in contact with the excess liquid moves together with the image holding member pressing means.

In the image forming substance removing device according to the present invention, the surface of the foaming member which is in contact with the surplus liquid moves as the image holding member pressing means moves, so that the surface does not move. Then, the foaming member can quickly remove the excess liquid.

In particular, the image-forming substance removing device according to claim 4 is
The image forming substance removing device according to claim 2, wherein the image holding member pressing means is constituted by an elastic roller, and the foaming member is
The elastic roller has a diameter larger than that of the elastic roller and is made of a material having a hardness lower than that of the elastic roller.

In the image-forming substance removing device according to the present invention, the diameter of the foaming member is increased so that the diameter is the same as the diameter of the elastic roller. The contact area between the heating means and the foam member can be increased,
The surplus liquid can be efficiently removed. Further, since the foaming member is a member having a hardness lower than that of the elastic roller, the foaming member is deformed by the pressing to the heating means side. Therefore, the elastic roller is formed by increasing the diameter of the foaming member. Does not reduce the area of contact with the peeling member.

In particular, the apparatus for removing an image-forming substance according to claim 5 is
The image forming substance removing device according to claim 2 or 3, wherein the total effective width of the elastic roller having the foaming member is set to be inside the width of the image forming substance peeling member on the heating means. It is a feature.

In the image forming substance removing device of the present invention, since the foaming member is brought into contact with the image forming substance peeling member moving on the heating means, the foaming member is provided to the non-rotating heating means. The frictional resistance of the foamed member is reduced as compared with the case where the foamed members directly contact each other. Therefore, wear of the foam member due to use over time is reduced, and the life of the foam member is extended.

In particular, the image-forming substance removing device according to claim 6 is
5. The image forming substance removing device according to claim 4, wherein, even if the thick portion of the foam member is pressed by the heating means, the thick portion is caught in the elastic roller of the foam member. It is characterized by having a cut portion to the extent that it does not exist.

In the image forming substance removing device of the sixth aspect, even if the thick portion of the foam member is pressed by the heating means, the thick portion is not caught by the elastic roller. Thereby, the contact area between the elastic roller and the peeling member is not reduced.

In particular, the image-forming substance removing device of claim 7 is
In the image forming substance removing device according to a fourth aspect of the present invention, the foaming member is configured such that the bubble ratio of the foaming member becomes smaller toward the outer side in the radial direction from the center.

Here, the bubble ratio of the foam member indicates the proportion of the volume of the bubbles in the total volume of the foam member.

In the image-forming substance removing device of the present invention, the excess liquid absorbed from the outer periphery of the foaming member having a small bubble ratio moves toward the center of the bubble ratio due to the capillary phenomenon, and in the opposite direction. It becomes difficult to move. Therefore, even if the foaming member is pressed toward the heating unit again, the excessive liquid that has once been absorbed is not leached again, and the excessive liquid is prevented from reattaching to the image carrier. . (Hereinafter, margin)

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention relates to a method in which a heat-fusible toner (hereinafter, referred to as a 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 toner removing device to be removed will be described. FIG. 2 is a schematic configuration diagram of a toner removing device to which the present invention can be applied. The toner removing device includes a paper feed unit 100 that separates and feeds, one by one, transfer paper 10 on which a toner image stored in a stacked state is formed;
A liquid application unit 200 for supplying the processing liquid 20 to the transfer paper 10 sent from the paper supply unit 100, a toner peeling unit 300 for peeling and removing the toner from the transfer paper 10 to which the processing liquid 20 is supplied, The drying unit 400 includes a drying unit 400 that dries the transfer paper 10 from which the toner has been removed, and a paper receiving unit 500 that receives the transfer paper 10 discharged from the drying unit 400.

In the paper feeding unit 100, the transfer papers 10 stacked on the bottom plate 101 are fed from the uppermost one by a paper feeding roller 102, and a double feeding is performed by a separating mechanism composed of a feed roller 103a and a separate roller 103b. Is separated and only one transfer paper 10 is sent out. The transfer paper 10 sent out by the paper supply unit 100 is conveyed by a conveyance roller pair 110, subjected to timing adjustment and skew correction by a registration roller pair 104, and sent to the next liquid application unit 200.

The above-mentioned liquid applying unit 200 includes the processing liquid 20.
Container 211 filled with a predetermined amount of
The submerged belt transport unit 212, which is a round belt that is wrapped around a support roller and rotatively driven while immersed in 0, a brush roller provided to face the submerged belt transport unit 212 across the transfer paper 10 213, a belt transport unit 214 and a brush roller 215 provided to transport the transfer paper 10 to which the liquid is applied, a pair of squeezing rollers 216 for removing an excess of the processing liquid 20 applied to the transfer paper 10, and the liquid container 2.
A liquid supply device 217 for supplying the processing liquid 20 to the apparatus 11 and a driving unit (not shown) such as the submerged belt transport unit 212 are provided.

Here, in the liquid supply device 217, a replaceable replenishing liquid bottle 218, and a tank 22 to which the processing liquid 20 is replenished from the replenishing liquid bottle 218 by an electromagnetic pump 219 as appropriate.
0, a liquid supply pump 221 such as a blade pump built in the tank 220, a pump motor 212 for rotating the liquid supply pump 221, and a liquid supply pipe 223 for sending the processing liquid 20 from the liquid supply pump 221 to the liquid container 211. And a drain pipe 224 for returning the processing liquid 20 discharged from a discharge port provided at a lower part of the liquid container 211 into the tank 220. In this configuration, the processing liquid 20 sent by the liquid supply pump 221 is supplied to the liquid container 211 through the liquid supply pipe 223. Then, the processing liquid 20 discharged from the discharge port of the liquid container 211 is returned into the tank 220 through the drain pipe 224 and circulated. Such a processing liquid 2
The amount of liquid supplied by the liquid supply pump 221 is set such that the submerged belt transport unit 212 is immersed in the processing liquid 20 in the liquid container 211 at the time of the steady circulation operation of zero.

The toner peeling unit 300 is provided in such a manner that an offset belt 311 as a belt-shaped peeling member wound around a plurality of supporting rollers 312, 313 and the like and an offset belt 311 are pressed against each other with the offset belt 311 interposed therebetween. A heating block 314 as a heating means with a built-in heating lamp 314a, a heating roller 315 as an image holding member pressing means with a built-in heating lamp 315a, and a blower fan 316 as a cooling means for cooling the toner adhering to the surface of the offset belt 311. A cleaning device 317 that removes toner from the surface of the offset belt 311 and a wiping roller 318 that wipes the surface of the offset belt 311 after cleaning by the cleaning device 317 and applies a predetermined tension to the belt.

Here, the heating block 314 and the heating roller 315 bring the toner image surface of the transfer paper 10 into close contact with the offset belt 311 and heat the toner adhered to the transfer paper 10 to soften it, as described above. It is a thing.

Further, at least the surface of the offset belt 311 is provided with respect to the softened or melted toner,
The transfer paper 10 is formed of a material having an adhesive force larger than the adhesive force between the surface of the transfer paper 10 and the toner. Here, the offset belt 311 is composed of a plurality of layers, at least one of which is a heat-resistant layer having excellent strength and heat resistance, and a layer in contact with the toner is an adhesive layer having excellent adhesion to the toner,
The adhesiveness and durability to the toner are excellent. As a material of the heat-resistant layer, a polyimide resin can be used. Further, as the material of the adhesive layer, ethylene terephthalate, polyethylene terephthalate,
Polymer materials such as polystyrene, acrylic resin, methacrylic resin, styrene-butyl acrylic copolymer, styrene-butadiene copolymer, polyester, epoxy resin, and polyimide resin can be used. The surface material of the offset belt 311 itself is, for example, aluminum-based,
When it is made of a metal material such as copper or nickel, or a polymer material such as polyethylene terephthalate (PET) in which titanium oxide is dispersed, it is a base from the viewpoint of elongation due to tension or heat and durability. It is desirable to have a multi-layered structure of at least two layers including the surface layer.

Further, a bent portion for changing the moving direction of the offset belt 311 by a predetermined radius of curvature is provided on the downstream side in the moving direction of the offset belt 311 from the pressure contact portion of the heating block 314 with the heating roller 315. Around the bent portion, the moving direction of the belt is rapidly changed to separate the curvature of the transfer paper 10 from the offset belt 311.

As the driving means for the offset belt 311, a supporting roller 42 rotatably driven by a driving motor (not shown) is used. The offset belt 311 is driven so as to move at substantially the same moving speed as the transfer speed of the transfer paper 10 via the frictional force with the rotating support roller 42.

The blower fan 316 cools the toner on the offset belt 311 which is heated by the heating block 314 or the like and has increased in viscosity, thereby solidifying the toner and removing it by the cleaning device 317. It makes it easier.

In the cleaning device 317, the offset belt 31 is provided by the brush roller 319 having a metal brush (stainless steel loop brush) on the surface.
This is to mechanically peel off and remove the toner attached to one surface. The brush roller 319 is urged toward the surface of the offset belt 311 by a pressure spring (not shown). Further, a metal blade may be provided on the downstream side of the brush roller 319 in the moving direction of the offset belt 311.

The wiping roller 318 is made of a material capable of exerting a good wiping effect at least on the surface thereof. For example, it is formed by winding a cloth or the like around the peripheral surface of the roller body. In this example, in order to cause the wiping roller 80 to exert a sufficient wiping effect over a long period of time, the wiping roller 80 is not normally rotated along with the offset belt surface, but is rotated by a predetermined angle at an appropriate timing to make contact with the offset belt surface. To be replaced.

The drying unit 400 is for drying the transfer paper 10 so that the liquid holding amount of the transfer paper 10 is 10% or less of the paper weight, and includes a heating drum 411 having a built-in heating lamp and made of, for example, aluminum. , A paper pressing belt 412 which is stretched around a plurality of supporting rollers and is endlessly moved while being wound around the peripheral surface of the heating drum 411 at a constant angle. As a material of the paper pressing belt 412, a material having heat resistance and air permeability, for example, cloth such as canvas, cotton, and tetron can be used. Further, the transfer paper 10 is shrunk in a completely free form while drying progresses in a region where the transfer paper 10 is wound around the peripheral surface of the heating drum so that wrinkles do not occur, and the transfer paper 10 is hardly curled or wavy. The transfer paper 10 can be held between the peripheral surface of the heating drum and the inner surface of the belt with a certain amount of force.

The paper receiving unit 500 has a pair of conveying rollers 511 for conveying the transfer sheet 10 from the drying unit 400, a branch claw 512, and a pair of discharge rollers 513, 51.
4. Internal discharge tray 515, external discharge tray (not shown)
And the like, and if necessary, a built-in discharge tray 51
5 or the discharge to the external discharge tray can be selected. Here, the internal discharge tray 515 is configured to be slidable so that it can be pulled out to the front side of the apparatus.

In the toner removing device having the above structure, the transfer paper 10 sent from the paper feeding unit 100 is uniformly applied with the processing liquid 20 on the toner image surface (lower surface in the drawing) of the liquid applying unit 200. It is sent to the toner peeling unit 300. The transfer paper 10 is
The toner adhered to the toner is softened by heating from the heating block 314 and the heating roller 315, and the offset belt 31
1 Adhere to the surface. Then, when the transfer paper 10 and the offset belt 311 are separated from each other around the bent portion of the heating block 314, the toner adhering to the surface of the offset belt 311 is peeled off from the transfer paper 10, whereby the transfer paper 10 is removed.
Toner is removed from the. Transfer paper 1 with toner removed
0 is dried by the drying unit 400, and the paper discharge roller pair 50
At 3, the sheet is discharged onto the built-in discharge tray 505 of the paper receiving unit 500. As described above, the transfer paper 10 with the toner attached
The toner is removed without damaging the paper fibers because the toner is peeled off in a state where the liquid is supplied to the transfer paper 10 and the liquid penetrates the interface of the transfer paper 10 with the toner.

Next, the toner peeling unit 300 of the toner removing device according to this embodiment will be described in more detail with reference to FIG. The surface portion of the heating roller 315 of the toner peeling unit 300 is formed of an elastic layer, and a ring-shaped foaming member 700 as a backing prevention means is formed at the end portion in the longitudinal direction of the heating roller 315. Installed. The foam member 700 may be integrally formed with the heating roller 315, or may be attached later by adhesion or press fitting. The foaming member 700 used in the present embodiment is required to have heat resistance because the heating roller 315 is internally heated by the heating lamp 315a, and has heat resistance such as silicone rubber or fluororubber. It is desirable to adopt materials.

In the above structure, the treatment liquid 20 is applied by pressing at the nip portion between the heating roller 315 and the offset belt 311 by the foaming member 700 as the backing prevention means provided at both ends in the longitudinal direction of the heating roller 315. The excess liquid squeezed from the transferred transfer paper 10 is absorbed by the foaming member 700, so that the heating roller 31
5 It is prevented that the end portion of the transfer paper 10 goes around from the end.

The outer diameter of the foam member 700 is larger than that of the heating roller 315. According to this,
Compared with the case where the outer diameter of the foam member 700 is the same as the outer diameter of the heating roller 315, the foam member 700 in the nip portion P between the offset belt 311 that moves endlessly on the heating block 314 and the foam member 700. Since the contact area can be increased, the excess liquid squeezed from the transfer paper 10 can be efficiently absorbed by this contact surface, and the excess liquid can be removed from the nip portion P. Further, since the foaming member 700 is made of a material lower than the hardness of the heating roller 315, the foaming member 700 can be used as the offset belt 3
Even if the contact belt 11 and the contact roller 11 are deformed, the contact area between the offset belt 311 and the heating roller 315 does not change due to the thickness of the foam member 700 that is larger than the outer diameter of the heating roller 315. You can

The heating roller 315 is the heating roller 3
Since the width in the longitudinal direction of 15 and the foam members 700 at both ends is set to be inside the width of the offset belt 311, the foam member 700 is an offset that moves endlessly on the heating block 314. It will be pressed by the belt 311. Therefore, the relative speed difference can be reduced and the frictional resistance can be reduced as compared with the case where the foaming member 700 that rotates together with the heating roller 315 is provided so as to come into contact with the heating block 314 that does not move. It is possible to reduce the abrasion of the foam member 700 due to. The foaming member 700 also plays a role of cleaning the scattered matter adhering to the surface of the offset belt 311 during the cleaning by the cleaning device 317.

The ring-shaped foam member 700 near the heating roller 315 has an outer diameter of the heating roller 315.
It is desirable to cut the diameter so that the boundary becomes smaller at the boundary with, for example, as shown in FIG. 3A, the cross section taken along the axis of the heating roller 315 has a tapered shape. If cut in this way, Fig. 3 (b)
As shown in FIG. 7, even if the foam member 700 is rotated and pressed against the heating block 314 side, the thick portion of the foam member 700 is not caught in the heating roller 315 side. It is possible to prevent the contact area between the offset belt 311 and the heating roller 315 from changing due to the thick portion being rolled up.

Further, the foaming member 70 is so designed that the bubble ratio, which indicates the ratio of the volume of the bubbles in the total volume of the foaming member 700, decreases from the radial center of the foaming member 700 to the outside.
If 0 is molded, as shown in FIG.
Excess liquid that has exuded from the transfer paper 10 due to the pressure contact of 15 is absorbed in the outer peripheral portion, and then is indicated by an arrow C in the figure due to a capillary phenomenon.
It moves to the central part indicated by and becomes hard to move in the opposite direction.
Therefore, as the heating roller 315 rotates, the foam member 7
When 00 moves and is pressed again in the nip portion, the already absorbed excess liquid is not squeezed out of the foaming member 700, and the excess liquid does not reattach to the transfer paper 10. The excess liquid that has moved to the center of the foaming member 700 is heated by the heating lamp 315 a provided on the heating roller 315.
And the heat from the heating block 314 to evaporate from the end of the heating roller 315.

According to the above-described embodiment, it is possible to prevent the excess liquid from backing from the end portion of the heating roller 315 to the exit side of the transfer paper 10, so that the end portion of the transfer paper 10 after passing through the nip portion is prevented. Never reattach to Therefore, unlike the case where the end portion of the transfer paper 10 contains a larger amount of water than the central portion, the occurrence of waviness of the transfer paper 10 can be prevented. Therefore, when the transfer paper 10 that has passed through the nip portion is dried by the drying unit 400, the transfer paper 10 can be finished in a good state without waviness.

[0049]

According to the image forming substance removing device of the first to seventh aspects, the nip between the image holding member pressing means and the peeling member is provided by the backing prevention means provided at both longitudinal ends of the image holding member pressing means. The excess liquid squeezed from the image-carrying member to which the liquid has been applied by the pressing of the part can be prevented from circling from the end of the image-carrying member pressing means to the outlet side of the image carrier, so that the surplus liquid It does not redeposit on the edge of the image carrier after passing through the nip. Therefore, unlike the case where the end portion of the image carrier contains a larger amount of water than the central portion, the occurrence of waviness of the image carrier can be prevented. Therefore, there is an excellent effect that when the image carrier after passing through the nip portion is dried by the drying means, the image carrier can be finished in a good state without waviness.

Particularly, according to the image forming substance removing device of the second aspect, the surplus liquid is absorbed in the foaming of the foaming member by forming the backing prevention means by the foaming member having foamability. The surplus liquid can be efficiently removed as compared with the case where the backing prevention means is composed of a member having no such foaming.

Further, according to the image forming substance removing device of the third aspect, the pressing surface of the foaming member which is pressed toward the heating means by the rotation of the foaming member together with the image holding member pressing means. Unlike the case where the foaming member always takes the same position, the absorbing power of the excess liquid of the foaming member does not gradually decrease, so that the foaming member can efficiently and quickly absorb the excess liquid.

Further, according to the image forming substance removing device of the fourth aspect, the diameter of the foaming member is made larger than the diameter of the elastic roller, so that the pressing means and the foaming member are formed. Since it is possible to increase the area of the contact surface at the nip portion with, the surplus that can be absorbed by the contact of the foam member compared to the case where the diameter of the foam member is the same as the diameter of the image holding member pressing means. The amount of liquid can be increased. Further, since the foaming member is a member having a hardness lower than that of the elastic roller, the foaming member is deformed by the pressing on the heating means side. Therefore, by increasing the diameter of the foaming member, the elastic roller Does not reduce the area of contact with the peeling member. Therefore, it is possible to prevent the possibility of defective peeling of the image-forming substance on the surface of the image carrier.

Further, in particular, according to the image forming substance removing apparatus of the fifth aspect, since the foaming member is brought into contact with the image forming substance peeling member moving on the heating means, the foaming member is rotated. Wear of the foam member due to use over time can be suppressed as compared with the case of directly contacting the heating means. Therefore, the life of the foam member can be extended. The foaming member can also play a role of cleaning dirt adhering to the surface of the image forming material peeling member.

Further, according to the image-forming substance removing device of the sixth aspect, even if the thick portion of the foaming member comes into contact with the heating means and is crushed, the thick portion is elongated in the longitudinal direction of the elastic roller. Since it is not caught in the central part of the direction,
The area where the elastic roller contacts the peeling member is not reduced. Therefore, it is possible to prevent the possibility of defective peeling of the image-forming substance on the surface of the image carrier.

Further, according to the image forming substance removing device of the seventh aspect, the excess liquid absorbed by the outer peripheral surface of the foaming member moves to the center side of the foaming member and does not easily move in the opposite direction. Therefore, even if the foaming member is pressed toward the heating unit again, the excess liquid once absorbed by the foaming member is
Difficult to exude from the foam member. Therefore, it is possible to prevent the excess liquid absorbed by the foaming member from reattaching to the edge of the image carrier.

[Brief description of drawings]

FIG. 1 is an enlarged view of a toner peeling unit in a toner removing device according to this embodiment.

FIG. 2 is a schematic configuration diagram of a toner removing device to which the present invention can be applied.

FIG. 3A is an explanatory view showing a foam member according to a modified example. 3B is a side sectional view of FIG.

FIG. 4 is a side sectional view showing a foam member according to another modification.

FIG. 5 is a schematic configuration diagram of a conventional toner peeling unit.

[Explanation of symbols]

 10 Transfer Paper 100 Paper Feed Unit 200 Liquid Applying Unit 300 Toner Peeling Unit 311 Offset Belt 314 Heating Block 314a Heating Lamp 315 Heating Roller 315a Heating Lamp 400 Drying Unit 500 Paper Receiving Unit 700 Foaming Member

Claims (7)

[Claims] 1. A liquid applying means for applying a liquid for destabilizing the adhesion between the surface and the image forming substance to an image carrier having the liquid absorbing property at least on the surface where the image forming substance adheres. A heating means for heating the image carrier in a state where the liquid remains attached; and an image driven so that the surface moves endlessly in a closed path including a region in contact with the image carrier in the state. An image holding device provided with a forming material peeling member and an image holding member pressing unit arranged to press the image holding member toward the heating unit side on the side facing the heating unit via the image holding member. In the body image-forming substance removing device, the excess liquid squeezed from the image-holding member after the liquid application by being pressed by the nip portion between the image-holding member pressing means and the image-forming material peeling member is Back side of the nip part from the entrance side to the exit side in the image carrier transport direction An image forming substance removing device, characterized in that backing prevention means for preventing rotation is provided at both longitudinal ends of the image holding member pressing means. 2. The image forming substance removing device according to claim 1, wherein the backing prevention means is constituted by using a foaming member having a foaming property. 3. The image forming substance removing device according to claim 2, wherein the surface of the foaming member which is in contact with the excess liquid moves together with the image holding member pressing means. 4. The image forming substance removing device according to claim 2, wherein the image holding member pressing means is composed of an elastic roller, and the foaming member has a diameter larger than the elastic roller diameter. An image-forming substance removing device comprising a material having a hardness lower than that of an elastic roller. 5. The image forming substance removing device according to claim 2, wherein the total effective width of the elastic roller having the foaming member is inside the width of the image forming substance peeling member on the heating means. The apparatus for removing an image-forming substance, characterized in that 6. The apparatus for removing an image-forming substance according to claim 4, wherein, even if the thick portion of the foam member is pressed against the heating means on the elastic roller side of the foam member, the thick portion is elastic. An image forming substance removing apparatus having a cut portion that is not caught by a body roller. 7. The image forming substance removing apparatus according to claim 4, wherein the foaming member is configured such that the bubble ratio of the foaming member becomes smaller toward the outer side in the radial direction from the center. Removal device.