JP3329728B2 - Cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for a heat roll fixing device having a heat roller and a pressure roller, and more particularly to a cleaning device capable of better removing toner remaining on the heat roller.

[0002]

2. Description of the Related Art Full-color copying machines and printers have been put to practical use. In this full-color copier,
Four color toner images are formed on plain paper, and the four toner layers are fixed by passing through a heat roll fixing device. In this color fixing device, more heat is required to melt and mix the four toner layers. Therefore, it is required that the releasability of the heat roller be further enhanced. In order to satisfy this requirement, in a conventional heat roll fixing device, an oil supply roller is arranged in contact with a heat roller, and a larger amount of silicone oil is supplied than in a monochrome copying machine.

However, when a large amount of silicone oil is supplied, a large amount of silicon oil adheres to a finally obtained color copy, and there is a problem in copy quality. In order to solve this problem, a method is known in which a cleaning roller is arranged in contact with a heat roller, and the cleaning roller removes toner remaining on the heat roller. If the cleaning roller is provided, the toner remaining on the heat roller is removed, so that the supply amount of the silicon oil can be reduced, and the copy quality can be further improved. In this cleaning system, a system using a toner pickup roller in which an outer peripheral surface of an aluminum roller is covered with a Teflon tube and a metal toner storage device arranged in contact with the first roller has been put to practical use. In this cleaning method, the toner remaining on the heat roller is transferred to the toner pickup roller by utilizing a difference in releasability between a silicon rubber layer formed on the outer periphery of the heat roller and Teflon on the outer periphery of the cleaning roller. Then, the toner transferred on the first cleaning is transferred to the second metal roller.

[0004]

In the above-described cleaning method using two cleaning rollers, the Teflon tube having high releasability is arranged on the toner pickup roller in contact with the heat roller. Since the ability to transfer the toner to the cleaning roller side is relatively low, insufficient cleaning occurs, and there is a problem in cleaning performance. In other words, in the fixing method in which the fixing is performed while supplying the silicone oil for improving the releasability, the silicone oil also moves to the cleaning roller side, so that the releasability of the heat roller surface and the cleaning roller surface is different. The difference between them is relatively small, and as a result, the amount of residual toner transferred from the heat roller to the cleaning roller side is reduced, resulting in poor cleaning.

Accordingly, it is an object of the present invention to provide a cleaning device for a heat roll fixing device, which solves the above-mentioned disadvantages and has excellent cleaning performance.

[0006]

SUMMARY OF THE INVENTION A cleaning device according to the present invention is a cleaning device for a heat roll fixing device having a heat roller and a pressure roller, and removes toner remaining on the heat roller to be cleaned. A toner pickup roller, and a toner collecting device for collecting toner transferred to the toner pickup roller side, wherein the toner pickup roller has a metal shaft, a sponge-like elastic silicon rubber layer formed on an outer periphery of the shaft, A silicone rubber layer having an adhesive property, which is formed on the outer periphery of the sponge-like elastic silicone rubber layer, and the toner collecting device is rotatably supported,
An outer peripheral surface is provided with a rotating body having adhesiveness equal to or higher than the adhesiveness of the outer periphery of the toner pickup roller.

The present inventor conducted various experiments and analyzes on a method of using a cleaning roller to remove toner remaining on a heat roller coated with silicone oil as a release agent. It has been found that the tackiness of the surface and the contact time between the cleaning and the heat roller are extremely important. That is, in a fixing device that performs fixing while supplying silicone oil to the heat roller, since the silicone oil is also transferred to the cleaning roller side, for example, the releasing property between the Teflon and the silicone rubber is reduced. If there is only a slight difference in the releasability from the cleaning roller, the remaining toner cannot be transferred to the cleaning roller satisfactorily. On the other hand, when the surface of the cleaning roller has an adhesive property, the adhesive force works effectively, so that even if silicon oil exists on the surface of the cleaning roller, the toner remaining on the heat roller by the action of the adhesive force is removed. It can be effectively transferred to the cleaning roller side. Usually, the heat roller of the heat roll fixing device is a silicon rubber roller having a silicon rubber layer having a thickness of about 1.5 mm or a Teflon roller having a Teflon layer coated on the outer periphery, and has almost no tackiness. Absent. In particular, since the surface of the Teflon roller is hard, there is no tackiness at all. Therefore, the remaining toner can be sufficiently transferred to the cleaning roller side even if the surface of the cleaning roller has relatively low tackiness. Based on this recognition,
In the present invention, the outer periphery of the toner pickup roller is provided with adhesiveness, and the toner remaining on the heat roller is transferred to the cleaning roller side by effectively utilizing the adhesive force. Further, there is a problem that paper dust adheres to the heat roller when the storage paper passes through the heat roll. However, since the toner big-up roller according to the present invention has adhesiveness, a useful advantage that not only toner but also paper powder can be removed together can be achieved.

Next, the contact time between the heat roller and the cleaning roller will be described. The present inventor conducted experiments on the contact time and the pressure contact force between the heat roller and the cleaning roller by changing the nip width of the cleaning roller. As a result, the longer the contact time, the easier the transfer from the heat roller to the cleaning roller side. There was found. That is, since the heat roller rotates at a high speed, simply contacting the hard cleaning roller with the surface of the heat roller causes the contact time between the heat roller and the cleaning roller to be too short, and causes the toner on the heat roller to move toward the cleaning roller. It cannot be transferred sufficiently. Therefore, in order to obtain a sufficient contact time, an elastically deformable rubber material layer is provided on the toner pickup roller, and a sufficient nip width is formed between the heat roller and the toner pickup roller. As described above, when the toner pickup roller has the elastic rubber layer, an appropriate contact time can be obtained in addition to the adhesiveness of the cleaning roller, and the cleaning performance can be further improved.

On the other hand, it is necessary to transfer the toner transferred to the toner pickup roller to the toner collecting device. For this reason, in the present invention, an adhesive force equal to or higher than the adhesive force of the first cleaning is applied to the surface of the collecting rotating body that comes into contact with the toner pickup roller of the toner collecting device. As described above, by providing a difference in adhesive force between the toner pickup roller and the rotating body of the toner collection device, the toner transferred to the toner pickup roller can be easily transferred to the toner collection device side. In particular, when silicone rubber is used as the adhesive material, the adhesive strength can be freely set only by changing the compounding composition, which is extremely preferable. Further, since the toner pickup roller is in contact with the high-temperature heat roller and the toner collection device is not in contact with anything other than the toner pickup roller, the temperature of the rotating body of the toner collection device is always lower than the temperature of the toner pickup roller. The inventors of the present invention have examined the transferability of the melted toner and found that the melted toner transfers to a lower temperature side. Therefore, if the rotating body of the collecting device is disposed in contact with the toner pickup roller, the toner of the toner pickup roller is effectively transferred to the toner collecting device even when the adhesiveness of the toner collecting device is equal to the adhesiveness of the toner pickup roller. be able to.

[0010] Due to the strong adhesive force of the toner collecting device, the toner on the toner pig-up roller is sequentially transferred to the toner collecting device side and accumulated on the surface of the rotating body of the toner collecting device.
Therefore, there is a concern that the adhesiveness of the toner collecting device is reduced. However, the surface temperature of the toner collecting device is lower than the surface temperature of the toner pickup roller by about 20 ° C., and the molten toner has a property of shifting to a lower temperature side. Even when the temperature difference between the pickup roller and the toner collection roller occurs, the toner on the toner pickup roller moves to the toner collection device. That is, the toner transferred to the toner pickup roller is in a molten state or a semi-molten state,
The toner adhering to the surface of the toner collecting device is cooled by surrounding air during one rotation after contacting the toner pickup roller, and becomes a solid state or a semi-solid state. Since the toner of the toner pickup roller and the toner collection roller are made of the same resin, the toner in the molten state or the semi-molten state on the toner pickup roller has a very large slippage on the toner layer formed in the toner collection device. Therefore, the melted toner of the toner pickup roller overcomes the relatively low adhesive force of the toner pickup roller and transfers to the toner collecting device. In other words, even if the toner is transferred to the toner collecting device and the toner is formed in a layer form and the initial tackiness of the surface of the toner collecting device is reduced, the toner layer formed by the transferred toner is newly applied to the toner on the toner pickup roller. A suitable adhesive layer. As a result, the toner collecting device to which the toner adheres in a layered form has not only the function of removing the toner on the toner pickup roller but also the ability to accumulate the removed toner. As a result, even if the copying operation is performed many times, the toner pickup roller is always kept in a clean state, and the toner removing performance of the toner pickup roller does not deteriorate. As described above, the toner collecting device according to the present invention has extremely excellent performance of accumulating the removed toner in addition to the function of removing the toner. In particular, since the strong adhesive force of the toner storage device has the ability to hold the toner layer formed by copying many times, even if a crack or the like occurs in the formed toner layer, the inconvenience that the toner pieces are scattered occurs. Not beneficial effects are also achieved. Further, it can be reused after being washed with the solvent of the rotating body of the recovery device, or can be easily replaced.

In a preferred embodiment of the cleaning device according to the present invention, the rotating body of the toner collecting device includes a cylindrical paper tube mainly made of wood fiber and an adhesive rubber layer formed on an outer peripheral surface of the paper tube. Wherein the adhesiveness of the adhesive rubber layer is equal to or higher than the adhesiveness of the outer peripheral surface of the toner pickup roller. Since the carbonization temperature of the wood fibers constituting the paper tube is about 220 ° C and the vulcanization temperature of the adhesive silicon is about 160 ° C, it is necessary to form an adhesive silicon rubber layer on the outer peripheral surface of the paper tube. Is extremely easy. In addition, since the adhesive strength of the adhesive silicone rubber layer can be appropriately set to a desired value, it is extremely suitable as a recovery device. Further, since the paper tube is inexpensive and can be easily replaced, the running cost of the cleaning device can be greatly reduced.

More importantly, since the heat roller needs to be kept at a high temperature at all times, it is necessary to avoid heat release from the heat roller as much as possible. For this purpose, it is necessary to reduce the heat release from the cleaning roller as much as possible. That is, when the cleaning roller has a high heat dissipation effect, it becomes difficult to maintain the heat roller itself at a predetermined fixing temperature, and the function of the heat roll fixing device cannot be maintained. In this regard, the present inventor has conducted various experiments and analyzes. As a result, the heat release from the outer periphery of the cleaning roller to the surrounding air is relatively small, and the heat transfer from the cleaning shaft to components such as the frame is performed. Was found to be acting very strongly. That is, since the metal material has a high thermal conductivity, heat conducted from the heat roller is immediately transmitted to a member such as a frame via a metal shaft. From such a viewpoint, in the present invention, both the toner pickup roller and the toner collecting device have a heat insulating effect. For this reason, a paper tube is arranged between the metal shaft of the toner pickup roller and the elastic rubber layer, and the core tube of the rotating body of the toner collecting device is formed of a paper tube having extremely low thermal conductivity and performing a heat insulating function. Since the paper tube is mainly made of wood fiber and has a high heat insulating effect, heat release from the cleaning device is significantly reduced, so that a good cleaning device can be realized from the viewpoint of heat dissipation.

In a preferred embodiment of the cleaning device according to the present invention, the elastic rubber layer of the toner pickup roller is formed on a sponge-like elastic silicone rubber layer disposed on the outer periphery of the shaft, and on the outer periphery of the sponge-like elastic silicone rubber layer. And a silicone rubber layer having an adhesive property. As described above, important matters of the present invention are:
The toner pickup roller is elastically deformable and its surface has adhesiveness. In this case, selecting a rubber material having an appropriate range of elastic modulus and tackiness narrows the range of material selection. On the other hand, in this example, the elastic modulus of the roller is defined by a sponge-like silicone rubber material, and the adhesiveness of the roller surface is defined by an adhesive silicone rubber layer formed on the outer periphery. Therefore, since the elasticity and the adhesiveness of the roller can be individually selected, the range of material selection is expanded, and as a result, the degree of freedom in design is further increased. Further, the sponge-like elastic silicon rubber layer is elastically deformable and has a large number of holes therein, so that it has a small heat capacity and a high heat insulating effect. Therefore, an appropriate nip can be formed between the heat roller to be cleaned and the toner pickup roller, and heat dissipation from the heat roller can be prevented.

A preferred embodiment of the cleaning device according to the present invention is characterized in that the outer diameter of the toner pickup roller is smaller than the outer diameter of the rotating body of the toner rotating body.
In the present invention, the transfer of toner from the toner pickup roller to the toner collection device is promoted by effectively utilizing the temperature difference between the toner pickup roller and the toner collection device.
In this case, by making the outer diameter of the toner collecting device larger than the outer diameter of the toner pickup roller, the temperature that decreases during one rotation of the rotating body of the toner collecting device after contact with the toner pickup roller increases. The temperature difference between the pickup roller and the toner collecting device can be increased, so that the toner transfer can be promoted and the toner holding ability of the toner collecting device can be further increased.

[0015]

FIG. 1 is a diagrammatic sectional view showing the structure of an example of a heat roll fixing device provided with a cleaning device according to the present invention. A pressure roller 2 is arranged opposite to a heat roller 1 for fixing an unfixed toner image. As the heat roller 1, for example, a roller in which a silicon rubber layer or a Teflon layer having a thickness of about 1.5 mm is formed as a release layer on the outer periphery of an aluminum cored roller can be used. As the pressure roller 2, for example, a roller in which an elastic silicon rubber of about 2 mm is formed on an outer periphery of an iron core bar and a Teflon tube is covered on an outer periphery of the elastic silicon rubber layer is used. The oil application roller 3 is arranged so as to be in contact with the heat roller 1. The oil application roller supplies the heat roller 1 with oil supplied from an oil supply felt (not shown). Further, the cleaning device 4 is disposed so as to be in contact with the heat roller 1, and the toner remaining on the heat roller 1 is removed. The cleaning device 4 includes a toner pickup roller 5 arranged in contact with the heat roller 1 and a rotating body 6 for the toner collection device arranged so as to be in contact with the toner pickup roller 5. The toner pickup roller 5 is forcibly driven via a gear and rotates in the same direction as the heat roller 1. The rotating body 6 for toner recovery is driven to rotate with respect to the toner pickup roller 5. The toner pickup roller 5 includes an elastic rubber material, and is pressed against the heat roller 1 by a pressing member (not shown) such as a pressing spring. Therefore, heat roller 1
An appropriate nip width is formed between the toner and the toner pickup roller 5. Further, the rotating body 6 for toner recovery is also pressed against the toner pickup roller 5 to
A nip having an appropriate width is formed between these rollers. The outer diameter of the toner pickup roller 5 is smaller than the outer diameter of the rotating body for toner recovery, and the temperature difference between the toner pickup roller 5 and the rotating body for toner recovery is large at a position where these rollers contact each other. Set to be. That is, by increasing the outer diameter of the rotating body for toner recovery, the surface thereof is further cooled by the surrounding air by rotating, so that the temperature difference can be further increased, and the remaining toner can be transferred to the toner collecting device. Transfer can be further promoted.

The toner remaining on the surface of the heat roller 1 is picked up by the adhesive force of the toner pickup roller 5 and moves to the toner pickup roller side. The toner moves to the collection device 6 side, and gradually accumulates on the surface of the rotating body for toner collection.

FIG. 2 is a schematic sectional view showing the structure of an example of the toner pickup roller and the toner collecting device according to the present invention. The toner pickup roller 5 has a metal shaft 10 and an elastically deformable thick adhesive silicon rubber layer 11 formed on the outer periphery of the shaft 10. Therefore, the toner pickup roller 5 can be elastically deformed and its outer peripheral surface has adhesiveness. The rotating body of the toner collecting device has a cylindrical paper tube 12 mainly made of wood fiber and a thin adhesive silicon rubber layer 13 formed on the outer peripheral surface of the paper tube 12. The paper tube 12 is rotatably supported by a shaft 14 disposed inside the paper tube.
Although the shaft 14 is shown as being separated from the inner surface of the paper tube 12 in the drawing, the shaft 14 is arranged such that the second roller 6 is pressed against the toner pickup roller 5. Further, supporting members 15a and 15b such as E-rings are attached to both ends of the shaft 14 to hold the paper tube 13 so as not to move in the axial direction. Note that a washer may be arranged between the paper tube 13 and the E-ring. Accordingly, as the toner pickup roller 5 rotates, the rotating body 6 of the toner collecting device is also driven to rotate by the mutual adhesive force acting between the toner pickup roller and the rotating body of the collecting device.

The adhesiveness of the adhesive silicone rubber layer 13 of the rotating body 6 of the toner collecting device is made higher than the adhesiveness of the toner pickup roller. Therefore, the toner adhering to the surface of the toner pickup roller moves to the toner collecting device due to the strong adhesive force of the rotating body surface. Since the surface temperature of the rotating body of the toner recovery device is lower than the surface temperature of the toner pickup roller, the adhesiveness of the adhesive silicone rubber layer 13 of the rotating body 6 is set to be the same as the adhesiveness of the surface of the toner pickup roller. However, the residual toner can be effectively transferred to the toner storage device side. Therefore, the material of the adhesive silicone rubber layer 11 of the toner pickup roller and the material of the adhesive silicone rubber layer 13 of the rotating body of the toner collecting device can be made of the same material.

Since the toner collecting device has the adhesive silicon rubber layer 13 formed on the outer peripheral surface of the cylindrical paper tube 12, heat dissipation from the inside of the roller is greatly reduced, and an extremely high heat insulating effect is obtained. Have. In this example, the paper tube 12 is rotatably mounted on the shaft 14, but instead of the shaft 14, a shaft whose both ends are supported by bearings is used.
A paper tube can be directly connected to this shaft to be used as a roller.

FIGS. 3A and 3B are schematic sectional views showing a modified example of the toner pickup roller used in the cleaning device according to the present invention. The roller shown in FIG. 3A has a metal shaft 20, a silicon sponge rubber layer 21 formed on the outer periphery thereof, and an adhesive silicon rubber layer 22 formed on the outer periphery thereof. The silicone sponge rubber layer 21 has a function of giving elasticity to the roller, and its thickness can be, for example, about 3 mm. This silicone sponge rubber is
Because it has many holes inside, its heat capacity is small,
Moreover, since the air contained in the holes has a heat insulating effect, the air is also excellent in the heat insulating effect. Therefore, it is extremely useful from the viewpoint of the heat insulating property of the cleaning roller, and an excellent cleaning device can be realized in combination with the heat insulating effect of the toner collecting device shown in FIG. The adhesive silicone rubber layer 22 can be formed by applying an appropriate thickness to the outer periphery of a cylindrically extruded silicone sponge and then performing a vulcanization treatment. In this roller, the hardness and nip width are defined by the hardness and thickness of the silicone sponge rubber layer, and the adhesiveness of the surface is defined by the adhesiveness of the adhesive silicone rubber layer formed on the outer peripheral surface. Can be separately defined, and the degree of freedom in design is greatly improved.

The toner pickup roller shown in FIG. 3B has a metal shaft 20 and a silicone sponge rubber layer 21.
And a roller having a paper tube 23 disposed between the rollers. The heat insulation effect of the roller is further enhanced by heat insulation of the paper tube.

FIG. 4 is a schematic sectional view showing a modification of the cleaning device according to the present invention. In this example, a belt or a film is used as the toner collecting device. In this example, the roller shown in FIG. 3A is used as a toner pickup roller to remove residual toner on the heat roller. A shaft 30 is arranged so as to face the toner pickup roller 5, and a cylindrical belt 32 having an adhesive silicon rubber layer 31 formed on the outer peripheral surface is arranged between the shaft 30 and the toner pickup roller 5. . The adhesiveness of the adhesive silicone rubber layer 31 on the outer periphery of the belt 32 is set higher than the adhesiveness of the toner pickup roller. The shaft 30 is disposed so as to press the belt 32 toward the cleaning roller 5.
In this cleaning device, with the rotation of the toner pickup roller 5, the belt 32 also rotates in the same direction due to the adhesiveness. Then, the toner attached to the surface of the pickup roller 5 due to this rotation is transferred from the pickup roller to the belt side due to a difference in adhesive force and is accumulated. In this cleaning device, since the surface area of the belt for storing the collected toner can be increased, the advantage that the holding capacity of the collected toner is further increased is achieved.

In the above-described embodiment, the adhesive silicone rubber layer is formed on the outer peripheral surface of the belt. However, when the belt itself is made of the same material as the resin of the toner to be removed, the belt and the resin of the toner are used. Have strong compatibility,
Even if the belt on the collection device side does not have adhesiveness, the molten toner on the pickup roller can be transferred to the belt side.

The present invention is capable of various modifications and changes limited to the above-described embodiment. For example, in the above-described embodiment, a heat roll fixing device having an oil supply roller has been described. However, the present invention can be applied to a heat roll fixing device having no oil supply roller. Further, as a heat roller to be cleaned, any heat roller having a release layer such as a silicon layer or a Teflon layer formed on the outer peripheral surface can be applied. Further, in the above-described embodiment, the adhesive silicon rubber layer was directly formed on the paper tube as the toner collecting device, but the adhesive silicon rubber layer was formed on the film, and this film was attached to the outer periphery of the paper tube. Alternatively, a sponge-like silicone rubber can be interposed between the paper tube and the adhesive silicone rubber layer. Further, in the above-described embodiment, the adhesive silicon rubber layer is directly formed on the outer periphery of the paper tube. However, the adhesive silicon layer is formed on the outer peripheral surface of a heat-resistant cylinder such as a cylindrical silicon sponge obtained by extrusion molding. It can be formed by forming and then vulcanizing to form an adhesive silicone rubber layer on a cylindrical body and then fitting it into a paper tube. Further, the toner pickup roller shown in FIG. 3A can be used as a toner storage device. Accordingly, the cleaning device can be configured by arranging two cleaning rollers shown in FIG. 3A so as to face each other. In this case, the adhesiveness of the outer periphery of the second roller which functions to accumulate toner can be made higher than the adhesiveness of the outer periphery of the first roller.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a configuration of an example of a heat roll fixing device including a cleaning device according to the present invention.

FIG. 2 is a schematic cross-sectional view showing a configuration of an example of a cleaning device according to the present invention.

FIG. 3 is a schematic sectional view showing a configuration of a toner pickup roller according to the present invention.

FIG. 4 is a schematic sectional view showing a modification of the fixing device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat roller 2 Pressure roller 3 Oil application roller 4 Cleaning device 5 Toner pickup roller 6 Rotating body of toner recovery device 10 Shaft 11 Adhesive silicone rubber layer 12 Paper tube 13 Adhesive silicone rubber layer 14 Shaft

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-63-300272 (JP, A) JP-A-61-86776 (JP, A) JP-A-49-91651 (JP, A) JP-A-63-91651 229477 (JP, A) JP-A-5-72921 (JP, A) JP-A-10-55119 (JP, A) JP-A-6-84466 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03G 15/20

Claims (7)

(57) [Claims] 1. A cleaning device for a heat roll fixing device having a heat roller and a pressure roller, comprising: a toner pickup roller for removing toner remaining on a heat roller to be cleaned; A toner collection device that collects the collected toner, wherein the toner pickup roller has a metal shaft,
A sponge-like elastic silicone rubber layer formed on the outer periphery of the shaft; and a silicone rubber layer having an adhesive property formed on the outer periphery of the sponge-like elastic silicone rubber layer. A cleaning device, which is freely supported and has a rotating body having an adhesiveness equal to or higher than the adhesiveness of the outer periphery of the toner pickup roller on the outer peripheral surface. 2. A rotating body of the toner collecting device, comprising: a cylindrical paper tube mainly made of wood fiber; and an adhesive rubber layer formed on an outer peripheral surface of the paper tube. 2. The cleaning device according to claim 1, wherein the adhesiveness of the layer is equal to or higher than the adhesiveness of the outer peripheral surface of the toner pickup roller. 3. The cleaning device according to claim 1, wherein the rotating body of the toner collecting device is constituted by a belt having an adhesive rubber layer formed on an outer peripheral surface. 4. A sponge-like elastic silicone rubber layer between a metal shaft of the toner pickup roller and a sponge-like elastic silicon rubber layer.
The cleaning device according to claim 1, wherein a paper tube that mainly uses wood fiber and acts as a heat insulating member is interposed. 5. The sponge-like elastic silicone rubber layer of the toner pickup roller is constituted by a single-cell sponge-like elastic silicone rubber layer to reduce heat dissipation from the toner pickup roller. Item 2. The cleaning device according to Item 1. 6. The cleaning device according to claim 1, wherein an outer diameter of the toner pickup roller is smaller than an outer diameter of a rotating body of the toner collecting device. 7. A cleaning device for a heat roll fixing device having a heat roller and a pressure roller, comprising: a toner pickup roller for removing toner remaining on the heat roller to be cleaned; A toner recovery device for recovering the toner to be removed, wherein the toner pickup roller is provided with a metal shaft, a sponge-like elastic silicone rubber layer disposed on the outer periphery of the shaft, and an outer periphery of the sponge-like elastic silicone rubber layer. A cleaning device, comprising: a formed adhesive silicon rubber layer; and the toner recovery device includes a belt rotatably supported and having compatibility with the toner to be removed.