JPH0962154A - Image forming substance removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of the waviness and wrinkles of an endless belt-like peeling member and the cutting of the endless belt-like peeling member by making the coefficient of friction of the part brought into contact with the endless belt-like peeling member at a supporting member other than a driving roller lower than the coefficient of friction of the part at the driving roller. SOLUTION: The coefficient of friction at the part, in contact with the belt 44, of supporting members other than the driving roller 41, namely, of a tracking roller 42 and the belt 44 of a heating block 43 is made to be lower than the coefficient of friction of the driving roller 41, so that the value is made to be sufficiently small. Thus, even though the belt 44 is made to be in the state of being obliquely shifted and supported during bias correcting operation, the belt 44 is excellently slid and moved in the perpendicular direction to the moving direction of the belt 44 on the driving roller 41 or the tracking roller 42, so that such a state is prevented from being continued for a long time. Thus, respective harmful influences caused when the belt 44 is obliquely supported are reduced or eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention removes an image forming substance from a recorded sheet to which an image forming substance such as a toner is stably attached by an image forming apparatus such as a copying machine, a facsimile machine, a printer and a printing machine. More specifically, the present invention relates to an image forming substance removing device, in which the sheet and an endlessly moving belt-shaped peeling member are brought into pressure contact with each other, and then the two are separated from each other, thereby peeling the image forming substance from a recorded sheet and removing the image forming substance. The present invention relates to a removing device.

[0002]

2. Description of the Related Art As an apparatus for removing an image-forming substance from a recorded sheet on which an image-forming substance such as toner adheres, the applicant of the present invention has previously proposed that the recorded sheet contains water as a destabilizing agent and a surfactant. And an aqueous solution containing a water-soluble polymer, and an aqueous solution containing a surfactant and 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. An image forming substance removing apparatus has been proposed in which a forming substance is heat-bonded or pressure-bonded to the peeling member to peel it from the sheet (see, for example, Japanese Patent Application No. 4-255916).

However, in this image forming substance removing apparatus, the peeling member is formed into an endless belt, and the belt-like peeling member (hereinafter referred to as peeling belt) is endlessly moved while being supported by a plurality of supporting members. When the peeling belt is configured to remove the image forming substance, the peeling belt movably supports the peeling belt in the longitudinal direction, that is, in the direction perpendicular to the endless moving direction of the peeling belt (hereinafter referred to as the longitudinal direction). There is a possibility that a so-called belt deviation may occur.

Therefore, in order to prevent such a belt deviation, the applicant previously adjusted the position where the driving roller for transmitting the rotational driving force to the peeling belt and at least one edge of the peeling belt start contact with each other. For example, an image forming substance removing device provided with a contact position adjusting unit including a tracking roller has been proposed (see Japanese Patent Application No. 6-295805). According to this image forming substance removing device, when the position where the drive roller and the edge of the peeling belt start contact is changed by the contact position adjusting means, the contact position adjusting means moves the contact belt in the endless movement direction of the peeling belt more than the contact position adjusting means. First, the peeling belt moves in the longitudinal direction on the supporting member located downstream. Along with this movement, the peeling belt starts moving even on the supporting member located one downstream of the supporting member, and the movement is sequentially transmitted to the downstream side, and the belt deviation is eliminated by these operations. can do.

[0005]

However, in this image forming substance removing apparatus, from the time when the contact position adjusting means starts the operation for eliminating the deviation of the peeling belt to the time when the deviation of the belt is eliminated ( (Hereinafter, it is said to be relieving)
In addition, the peeling belt may be corrugated, the peeling belt may be wrinkled, or the peeling belt may be cut in some cases. The reason for this will be described below. While the deviation is eliminated, a certain supporting member (hereinafter, referred to as an upstream supporting member) and a supporting member located one downstream from the upstream supporting member in the conveying direction of the peeling belt (hereinafter, the downstream supporting member). When the movement of the belt is transmitted to and from the support member), as described above, first, the movement for eliminating the deviation in the peeling belt is started on the upstream support member, and then this movement is performed on the downstream support member. Is transmitted to. Therefore, while the movement of the peeling belt is being transmitted from the upstream supporting member to the downstream supporting member, the peeling belt is in a state of being diagonally displaced and supported between the both supporting members, which causes waviness in the peeling belt. Or cause
This causes wrinkles on the peeling belt.

The peeling belt is pressure-bonded to the image forming substance adhering to the sheet surface in a part of the moving path. Therefore, when the above-mentioned wavy or wrinkled part of the peeling belt reaches this part, a fold is generated in the peeling belt due to the crushing of the wavy or wrinkle, and the peeling belt is cut from this fold in some cases. It will end up.

The present invention has been made in view of the above problems, and an object of the present invention is to corrugate or wrinkle an endless belt-like peeling member which may occur in a conventional image forming substance removing apparatus. It is an object of the present invention to provide an image forming substance removing apparatus that does not cause the occurrence of the above phenomenon or the cutting of the endless belt-shaped peeling member.

[0008]

In order to achieve the above object, the apparatus for removing an image-forming substance according to claim 1 is characterized in that the image-forming substance adhered to the surface of the sheet is separated from the surface and the image-forming substance. The pressure-sensitive endless belt-shaped peeling member capable of exerting a larger adhesive force on the image-forming substance than that of the image-forming substance is separated, and then the sheet surface and the peeling member are separated to separate the image-forming substance. A peeling device that peels from the sheet surface, a plurality of support members that support the endless belt-shaped peeling member so as to be capable of endless movement in a closed path including a region that contacts the sheet surface, and among the support members. A drive roller composed of at least one support member, and a drive source for transmitting a rotational drive force to the drive roller to move the sheet endlessly,
An image forming substance removing device comprising: a contact position adjusting means for adjusting a position at which the drive roller and at least one edge of the endless belt-shaped peeling member start contact with each other; The friction coefficient of a portion of the supporting member other than the drive roller that is in contact with the endless belt-shaped peeling member is lower than the friction coefficient of a portion of the drive roller that is in contact with the endless belt-shaped peeling member. It is a feature.

In the image forming substance removing apparatus according to claim 1, the friction coefficient of a portion of the plurality of supporting members other than the driving roller, which is in contact with the endless belt-shaped peeling member, is the friction coefficient of the driving roller. The coefficient of friction is set to be lower than the friction coefficient of the portion contacting the endless belt-shaped peeling member. Therefore, as compared with the case where both friction coefficients are the same, one of the plurality of support members (hereinafter, referred to as an upstream support member) and an endless belt-shaped peeling member (hereinafter, referred to as an upstream support member) , The peeling belt), while the movement of the peeling belt is transmitted between the peeling belt and a supporting member located one downstream in the conveying direction of the peeling belt (hereinafter referred to as the downstream supporting member), the peeling belt is quickly moved on the downstream supporting member. It slides and moves in a direction perpendicular to the endless movement direction. Therefore, as compared with the case where both friction coefficients are the same, the time during which the peeling belt is in a state of being diagonally displaced and supported between the supporting members during the movement becomes shorter,
This makes it less likely that the peeling belt will be wavy or wrinkled due to the peeling belt being displaced and supported. In addition, since the peeling belt is less likely to be wavy or wrinkled, it is less likely that the portion of the peeling belt that is wavy or wrinkled is pressed to form a fold.

The image-forming substance removing device according to claim 2 is
The endless belt-shaped peeling member capable of exerting a larger adhesive force on the image forming substance adhered to the surface of the sheet than the adhesive force between the surface and the image forming substance is pressed. A peeling device that separates the sheet surface and the peeling member to separate the image-forming substance from the sheet surface after contact, and a closing device including a region in which the endless belt-shaped peeling member contacts the sheet surface. A plurality of support members that support endlessly movable in a path, a drive roller composed of at least one of the support members, and a rotational drive force transmitted to the drive roller to move the sheet endlessly. An image forming substance removing device comprising: a driving source for driving the driving roller; and a contact position adjusting means for adjusting a position where the driving roller and at least one edge of the endless belt-shaped peeling member start contact with each other. A friction coefficient in a direction perpendicular to the endless moving direction of the peeling member (hereinafter, referred to as a vertical friction coefficient) in a portion of the plurality of supporting members in contact with the endless belt-shaped peeling member is defined as follows. It is characterized in that it is made lower than the friction coefficient (hereinafter, referred to as moving direction friction coefficient). Even if the vertical friction coefficient of all of the plurality of supporting members is lower than the moving direction friction coefficient, only some of the plurality of supporting members have the vertical friction coefficient more than the moving direction friction coefficient. May be lower.

In the image forming substance removing apparatus according to the second aspect of the present invention, the vertical friction coefficient of the support member is set lower than the friction coefficient in the moving direction. Therefore, as compared with the case where both friction coefficients are the same, among the plurality of support members. One support member (hereinafter, referred to as an upstream support member) and a support member (hereinafter, referred to as downstream support) located one downstream in the transport direction of the endless belt-shaped separation member (hereinafter, referred to as a separation belt) from the upstream support member. Member)
While the movement of the peeling belt is transmitted between the peeling belt and the peeling belt, the peeling belt quickly slides and moves on the downstream support member in a direction perpendicular to the endless movement direction. Therefore, as compared with the case where the two friction coefficients are the same, the time during which the peeling belt is obliquely displaced and supported between the supporting members during the movement is shortened, and thus the peeling belt is displaced and supported. As a result, the release belt is less likely to wavy or wrinkle. In addition, since the peeling belt is less likely to be wavy or wrinkled, it is less likely that the portion of the peeling belt that is wavy or wrinkled is pressed to form a fold.

Further, the image forming substance removing device according to claim 3 is
The endless belt-shaped peeling member capable of exerting a larger adhesive force on the image forming substance adhered to the surface of the sheet than the adhesive force between the surface and the image forming substance is pressed. A peeling device that separates the sheet surface and the peeling member to separate the image-forming substance from the sheet surface after contact, and a closing device including a region in which the endless belt-shaped peeling member contacts the sheet surface. A plurality of support members that support endlessly movable in a path, a drive roller composed of at least one of the support members, and a rotational drive force transmitted to the drive roller to move the sheet endlessly. An image forming substance removing device comprising: a driving source for driving the driving roller; and a contact position adjusting means for adjusting a position where the driving roller and at least one edge of the endless belt-shaped peeling member start contact with each other. The friction coefficient in the direction perpendicular to the endless movement direction of the peeling member on the surface of the endless belt-shaped peeling member in contact with the plurality of support members is made lower than the friction coefficient in the endless movement direction on the surface. It is characterized by that.

In the image forming substance removing apparatus according to the third aspect, the friction coefficient of the peeling member in the direction perpendicular to the endless moving direction of the peeling member is made lower than the friction coefficient of the surface in the endless moving direction. As compared with the case where the two friction coefficients are the same, one supporting member (hereinafter referred to as an upstream supporting member) of the plurality of supporting members, and an endless belt-shaped separating member (hereinafter, separating belt) from the upstream supporting member. While the movement of the peeling belt is transmitted to and from the supporting member located one downstream in the conveying direction (hereinafter, referred to as the "downstream supporting member"), the peeling belt rapidly moves its endless end on the downstream supporting member. It moves by sliding in the direction perpendicular to the moving direction. Therefore, as compared with the case where the two friction coefficients are the same, the time during which the peeling belt is obliquely displaced and supported between the supporting members during the movement is shortened, and thus the peeling belt is displaced and supported. As a result, the release belt is less likely to wavy or wrinkle. In addition, since the peeling belt is less likely to be wavy or wrinkled, it is less likely that the portion of the peeling belt that is wavy or wrinkled is pressed to form a fold. Further, in the image forming substance removing apparatus according to claim 3, since the friction coefficient of the peeling member in the direction perpendicular to the endless moving direction of the peeling member is made lower than the friction coefficient of the surface in the endless moving direction, peeling is performed. The friction coefficient in the endless movement direction of the belt can be made sufficient, and the rotational driving force from the driving roller can be transmitted well. (Hereinafter, margin)

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1] Hereinafter, the present invention will be described. Image formation in which a heat-melting toner (hereinafter, referred to as a toner) as an image forming substance is removed from a transfer paper as a sheet on which an image is formed by a transfer type electrophotographic copying machine. A first embodiment applied to a substance removing device (hereinafter referred to as a toner removing device) will be described.

First, a schematic structure of the toner removing device according to this embodiment will be described. FIG. 1 is a front view showing a schematic configuration of this toner removing device. In FIG. 1, the toner removing device is a liquid supply unit 30 that supplies liquid to the transfer paper 10 sent from a paper supply unit (not shown).
A toner peeling unit 40 as a peeling device that peels the toner from the transfer paper 10 to which the liquid has been supplied; a drying unit 60 that dries the transfer paper 10 from which the toner has been removed;
A sheet receiving unit (not shown) for receiving the transfer sheet 10 discharged from the drying unit 60 is provided.

The paper feeding unit feeds the transfer papers 10 to the liquid supply unit 30 one by one with the surface on which the toner image is formed (hereinafter referred to as the toner image surface) facing down, for example, electrophotographic copying. It is similar to the paper feed unit in the machine.

The liquid supply unit 30 supplies a liquid 31 such as water or an aqueous solution containing a surfactant in order to improve the permeability of the transfer paper 10 to the transfer paper 10, and contains the liquid. The liquid container 32, the coating roller 33 which is provided so as to be partially submerged in the liquid in the liquid container 32, scoops up the liquid by rotation and supplies it to the toner image surface of the transfer paper 10, and sandwiches the paper transport path. A regulating roller 3 as a paper regulating member provided so as to face the coating roller 33.
4 and.

The toner peeling unit 40 serves as a toner offset belt (hereinafter referred to as an offset belt) 44, which is an endless belt-shaped peeling member, and a plurality of supporting members for supporting the offset belt 44 so as to be capable of endless movement. The driving roller 41, the tracking roller 42, the heating block 43, and the heating roller 45 as a pressing member provided at a position where the offset belt 44 is sandwiched between the heating roller 45 and the heating block 43, and the surface of the offset belt 44. A wiping roller 80 as a wiping means for removing the residue is provided. Further, a heater 43a is provided inside the heating block 43, and a heater 45a is provided inside the heating roller 42.
Further, a drive source for transmitting drive to the drive roller 41 is attached to the drive roller 41.

At least the surface of the offset belt 44 is formed of a material capable of exerting 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. For example, the belt itself is made of aluminum, copper,
It is formed of a metal material such as nickel or a polymer material such as polyethylene terephthalate (PET) in which titanium oxide is dispersed.

Further, the corner 43c of the heating block 43 on the downstream side in the transfer paper conveying direction is formed at an angle of about 90 degrees, and the offset belt portion passing through the corner 43c suddenly changes its moving direction to move from the offset belt 44. The separation of the curvature of the transfer paper 10 is performed.

The heating block 43 and the heating roller 45 bring the toner image surface of the transfer paper 10 sent from the liquid supply unit 30 into close contact with the offset belt 44 and remove the toner adhered to the transfer paper 10. It is heated to soften it.

Further, the belt cleaning device 47 is
The offset belt 44 is provided with a rotating brush roller 50 for applying an intermittent scratching force to the peripheral surface of the offset belt 44 to remove the adhered toner, and a blade 51 for removing the toner made of metal or resin, and the toner removed from the peripheral surface of the belt by these. Are housed in the unit casing 52.

In the illustrated toner peeling unit 40, the transfer paper 10 sent from the liquid supply unit 30 side is sent.
An upper guide plate 70 is provided to guide the pressure belt to the pressing portions of the offset belt 44 and the heating roller 45, which are backed up by the heating block 43. Also,
A lower guide plate 71 is also provided for guiding the transfer paper 10 that has passed through the pressure contact portion and is curvature-separated from the offset belt 44 around the downstream corner portion 43c of the heating block 43 to the drying unit 60 side. .

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

In the paper receiving unit, the upper and lower guide members for guiding the transfer paper 10 that has passed through the holding region between the heating drum and the paper pressing belt in the drying unit 60, and the transfer paper guided by the guide member. It can be configured by a pair of paper discharge rollers that convey the sheet 10, a tray that receives the transfer paper discharged by the pair of paper discharge rollers, and the like.

In the toner removing apparatus whose schematic structure has been described above, the transfer paper 1 sent from the paper feeding unit
In the case of 0, the liquid is uniformly supplied to the toner image surface by the liquid supply unit 30, and is sent to the toner peeling unit 40. In the toner peeling unit 40, the toner adhered to the transfer paper 10 is softened by heating from the heating block 43 and the heating roller 45 and adheres to the surface of the offset belt 44.
Then, when the transfer paper 10 and the offset belt 44 are separated from each other around the downstream corner portion 43b of the heating block 43, the toner adhering to the surface of the offset belt 44 is peeled off from the transfer paper 10, whereby the transfer paper 10 is removed. Toner is removed. The transfer paper 10 from which the toner has been removed is dried by the drying unit 61 and discharged to the paper receiving unit.

In this toner removing device, the liquid is supplied to the transfer paper 10 to which the toner adheres, and the toner is peeled off while the liquid permeates the interface of the transfer paper 10 with the toner, so that the paper fiber is damaged. The toner can be removed without

In this toner removing device, the toner attached to the offset belt 44 is removed by the rotating brush roller 50 and the cleaning blade 51 of the belt cleaning device 47, and the toner is non-uniformly attached and deposited on the offset belt 44. Therefore, it is possible to prevent defective toner removal due to partial poor adhesion between the offset belt 44 and the transfer paper 10 due to residual toner.

In this toner removing apparatus whose schematic structure and operation have been described above, the offset belt 44, which is an endless belt-shaped separating member, is rotated around the drive roller 41 and the tracking roller 42, which are supporting members. There is a risk of leaning towards the belt because it is made. Particularly, in the toner removing device of the present embodiment, since the offset belt 44 is sandwiched and pressed by the heating roller 45 as a pressing member and the pressing block 43, the belt is more likely to occur. That is, in this embodiment, the heating roller 45 and the heating block 43 are arranged so that the offset belt 4
4 becomes a resistance against the movement of the heating roller 45, and the non-uniformity of the frictional force between the heating roller 45 and the heating block 43 in the width direction may cause the belt deviation. In addition, the offset belt 44, the heating roller 45, and the heating block 4
The frictional force between the heating roller 45 and the heating block 43
It depends not only on the pressure contact force with the transfer paper 10 but also on the degree of wetting of the transfer paper 10. Therefore, the non-uniformity of the wetting amount of the transfer paper 10 in the width direction can also cause the belt deviation.

Therefore, this toner removing device is provided with contact position adjusting means for adjusting the position where the drive roller 41 and at least one edge of the offset belt 44 start contacting, and based on the output of the deviation detecting means. The control means controls the inoculation position adjusting means to correct the belt deviation. The inoculation position adjusting means will be described below.

FIG. 2 is a schematic block diagram showing a structural example of the contact position adjusting means which is a main part of the image forming substance removing apparatus. The contact position adjusting means includes a support position adjusting means for adjusting a position for supporting one end of the tracking roller, and supports one end of the tracking roller 42 and an arm 91 for adjusting a supporting position, and a tracking position. A bearing (not shown) that rotatably supports the other end of the roller 42 around the shaft itself, a shaft 92 that oscillates the arm 91, and an actuator 93 that is a solenoid that oscillates the arm 91. It is configured.

Here, the reason why the offset of the offset belt 44 can be corrected by adjusting the position where the drive roller 41 and the edge portion of at least one of the offset belts 44 start contacting with each other, that is, the plurality of supporting members, The reason why the belt deviation can be corrected by the position where the belt and the driving roller first come into contact with each other when the belt rotatably supported is endlessly moved by rotating the driving roller formed of one supporting member will be described.

FIG. 3 is an explanatory view showing from the front the position where the belt 44, which is endlessly movably supported by a plurality of supporting members including the driving roller 41 and the tracking roller 42, starts contact with the driving roller 41. , FIG. 4 shows the belt 44
FIG. 6 is an explanatory view showing a position at which the first contact with the drive roller 41 is made from the bottom surface direction. As shown in FIGS. 3A and 4A, when the line segment L1 indicating the position where the belt 44 starts contact with the drive roller 41 is parallel to the central axis 41a of the drive roller 41, 44 is a rotating shaft 41 indicated by an arrow A1
Since it moves in the direction perpendicular to a, the belt deviation does not occur. In this case, a point at which one edge 44L of the belt 44 starts contact with the driving roller 41 is indicated by a.

On the other hand, as shown in FIGS. 3B and 4B, the line segment L2 indicating the position where the belt 44 starts contact with the drive roller 41 is constant with the central axis 41a of the drive roller 41. Belt 44, the belt 44 is in the direction perpendicular to the line segment L2 indicated by the arrow A2, that is, the central axis 41a.
And will move in a direction having a certain angle. Therefore, in this case, as the belt 44 moves, it approaches the direction in which the distance between the center line 41a and the line segment L2 is wider. In this case, the point b where one edge 44L of the belt 44 starts contact with the drive roller 41 is indicated by b.

3 (c) and 4 (c), a line segment L3 indicating the position where the belt 44 starts contact with the driving roller 41 is the central axis 41a of the driving roller 41 and FIG.
The case where the angle is opposite to that shown in FIGS. 4B and 4B is shown. In this case, the belt 44 is in the direction perpendicular to the line segment L3 indicated by the arrow A3, that is, in the direction having the opposite angle to the central axis 41a as shown in FIGS. 3B and 4B. Will move. Therefore, in this case, as the belt 44 moves, the distance between the center line 41a and the line segment L3, which is the direction perpendicular to the line segment L3, approaches the wider direction. In this case, a point c where one edge portion 44L of the belt 44 starts contact with the drive roller 41 is indicated by c.

As described above, the deviation of the belt 44 changes depending on the position where the belt 44 first contacts the drive roller 41. Note that L1, L2, L3 shown in the above description
Since is a line segment along the surface of the drive roller 41, strictly speaking, the angle with the center line 41a cannot be considered. However, for convenience of description, each line segment L1, L2, and L3 has an angle formed by the line segment orthogonally projected on the surface of the belt 44 and the line segment orthogonally projected by the center line 41a on the surface of the belt 44. The angle is defined by L2 and L3 and the center line 41a.

From the above, it is understood that the deviation of the belt 44 can be corrected by adjusting the position where the belt 44 and the driving roller 41 first contact. Therefore, in this device, the offset belt 4 is adjusted by adjusting the position where the driving roller 41 and at least one of the edges of the offset belt 44 start contacting each other as described above by utilizing such a property.
Correcting the deviation of 4. That is, FIG.
In the state shown in FIGS. 4A and 4A, when one end of the tracking roller 42 is supported, the belt 44 and the driving roller 41 first come into contact with each other at the line segment L1 and one edge portion of the belt 44. 44L and the drive roller 41 first contact at a point a. From this state, one end on the front side of the apparatus main body that supports the tracking roller 42 is moved in the direction of arrow B1 shown in FIG. 3B. Then, as shown in FIGS. 3B and 4B, the belt 44 and the driving roller 41 are separated by the line segment L2.
First, the edge 44L of the belt 44 and the driving roller 41 first come into contact with each other at a point b.

From the state shown in FIGS. 3A and 4A, one end portion for supporting the tracking roller 42 is shown in FIG.
When moved in the direction of arrow B2 shown in (c), FIG.
As shown in FIG. 4C, the belt 44 and the driving roller 41 first contact at the line segment L3, and one edge 44L of the belt 44 and the driving roller 41 first contact at the point c. Become. Therefore, with this method, the position where the belt 44 and the drive roller 41 first contact each other is adjusted to correct the deviation of the belt 44.

As described above, in this device, the belt 44
The deviation of the belt 44 can be corrected by adjusting the position where the drive roller 41 and the drive roller 41 first come into contact with each other. However, when the deviation of the belt 44 is prevented by this method, the belt 44 is wavy, wrinkled, or
There may be various adverse effects such as disconnection of the. This is because the belt 44 is supported between the drive roller 41, the tracking roller 42, and the heating block 43, which are supporting members, while being obliquely displaced while having an angle during the deviation correcting operation. caused by.
Therefore, in this device, the friction coefficient of the support member other than the drive roller 41, that is, the portion of the tracking block 42 and the heating block 43 in contact with the belt 44 is set to be smaller than the friction coefficient of the drive roller. The value is set to be sufficiently small. As a result, even if the belt 44 is obliquely displaced and supported during the deviation correcting operation, the belt 44 is satisfactorily slid on the drive roller 41 or the tracking roller 42 in the direction perpendicular to the moving direction of the belt 44. By moving and moving, such a state does not continue for a long time. Therefore, each of the above-mentioned adverse effects resulting from the diagonal support of the belt 44 is reduced or eliminated.

Here, in order to lower the friction coefficient of the portion in contact with the belt 44 of the tracking roller 42 and the heating block 43, each member is formed of a material having a low friction coefficient such as metal or fluororesin, or each portion is The surface may be coated with a material having a low coefficient of friction. The drive roller 41
The reason why the friction coefficient of the portion contacting the belt 44 is made larger than that of the other supporting members is that the rotational driving force can be favorably transmitted from the driving roller 41 to the belt 44. Specifically, the surface of the drive roller 44 may be made of a material such as rubber having a sufficient friction coefficient for drive transmission.

However, from the drive roller 41 to the belt 44
In order to favorably transmit the rotational driving force to the drive roller 41, only the friction coefficient in the axial rotation direction of the drive roller 41, that is, the moving direction of the belt 44 needs to be increased. The coefficient of friction does not have to be high. Rather, the friction coefficient of the driving roller 41 in the direction perpendicular to the moving direction of the belt 44 is set in order to shorten the time during which the state in which the belt 44 is obliquely displaced and supported is continued, and to prevent the waving of the belt 44 more effectively. It is better to lower it. Therefore, as the driving roller 41, one that is grooved in the axial direction as shown in FIG. 5 is used, and its friction coefficient in the moving direction of the belt 44 is a friction coefficient for transmitting the rotational driving force to the belt. While ensuring the above, the friction coefficient in the direction perpendicular to the moving direction may be suppressed so that the belt 44 slides well in the direction. Further, similar to the driving roller 41, grooves other than the driving roller 41, that is, the tracking roller 42 and the heating block 43, may be provided with a groove perpendicular to the moving direction of the belt 44. The provision of such grooves allows the belt 44 to slide smoothly.

Further, in order to shorten the time for which the state in which the belt 44 is obliquely displaced and supported is shortened, instead of lowering the friction coefficient of the supporting member such as the tracking roller 42 as described above, the belt 44 is The friction coefficient in the direction perpendicular to the moving direction of the belt may be reduced. However, in this case, in order to ensure good transmission of the rotational driving force from the driving roller 41 to the belt 44, the friction coefficient of the belt 44 in the axial rotation direction of the driving roller 41, that is, the moving direction of the belt 44 is It must have sufficient height. Belt 44 that meets the requirements
As shown in FIG. 6, the tracking roller 42
And the like, whose surface on the side in contact with the supporting member is grooved perpendicular to the moving direction of the belt.

[0043]

According to the invention of claim 1, as compared with the case where the friction coefficient of the driving roller and the friction coefficient of the supporting member other than the driving roller are the same, an endless belt-shaped peeling member (hereinafter, peeling belt). That is, the peeling belt rapidly moves while the movement of (4) is transmitted between the support members. Therefore, the time period in which the peeling belt is obliquely displaced and supported between the supporting members is shortened, and the occurrence of waviness and wrinkles of the peeling belt is less likely to occur. As a result, defective removal of the image-forming substance due to waviness of the peeling belt or generation of wrinkles is less likely to occur, and good removal of the image-forming substance is realized. Further, the portion of the peeling belt where the wavy or wrinkled portions are pressed is less likely to cause a fold, and the peeling belt is less likely to be cut from the fold.

According to the invention of claim 2, an endless belt-shaped peeling member (hereinafter referred to as a peeling belt) in the supporting member.
Compared with the case where the friction coefficient in the endless movement direction and the friction coefficient in the direction perpendicular to the endless movement direction are the same, the peeling belt can be moved quickly. Therefore, the time during which the peeling belt is in a state of being diagonally displaced and supported between the supporting members is shortened, and the occurrence of waviness and wrinkling of the peeling belt is less likely to occur. As a result, defective removal of the image-forming substance due to waviness of the peeling belt or generation of wrinkles is less likely to occur, and good removal of the image-forming substance is realized. Further, the portion of the peeling belt where the wavy or wrinkled portions are pressed is less likely to cause a fold, and the peeling belt is less likely to be cut from the fold.

According to the third aspect of the invention, in the case where the friction coefficient in the endless moving direction of the endless belt-shaped peeling member (hereinafter referred to as the peeling belt) is the same as the friction coefficient in the direction perpendicular to the endless moving direction. Compared with, the peeling belt can be moved quickly. Therefore, the time during which the peeling belt is obliquely displaced and supported between the supporting members is shortened,
Rippling and wrinkling of the peeling belt are less likely to occur.
As a result, defective removal of the image-forming substance due to waviness of the peeling belt or generation of wrinkles is less likely to occur, and good removal of the image-forming substance is realized. Further, the portion of the peeling belt where the wavy or wrinkled portions are pressed is less likely to cause a fold, and the peeling belt is less likely to be cut from the fold.

According to the invention of claim 3, a sufficient friction coefficient can be secured in the endless movement direction of the peeling belt, and the rotational driving force from the driving roller is satisfactorily transmitted to the peeling belt, which is also good. It contributes to the realization of the removal of various image forming substances.

[Brief description of drawings]

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

FIG. 2 is a front view showing a main part of the toner removing device.

3A to 3C are explanatory views showing from the front a position where a belt and a driving roller included in the toner removing device start contact with each other.

FIGS. 4A to 4C are explanatory views showing from a bottom surface a position where a belt and a driving roller included in the toner removing device start contacting each other.

FIG. 5 is a perspective view showing a modified example of a drive roller included in the toner removing device.

FIG. 6 is a perspective view showing a modified example of an offset belt included in the toner removing device.

[Explanation of symbols]

 10 Transfer Paper 24 Paper Feeding Conveyor Pair 30 Liquid Supply Unit 31 Liquid 32 Liquid Container 33 Application Roller 34 Regulation Roller 40 Toner Removal Unit 41 Drive Roller 42 Tracking Roller 43 Heating Block 44 Offset Belt 45 Heating Block 46 Heating Roller 50 Rotation Brush 51 Blade 52 Unit casing 60 Drying unit 61 Heating drum 62 Support roller 63 Paper pressing belt 70 Upper guide plate 71 Lower guide plate 80 Wiping roller 91 Arm 92 Shaft 93 Actuator

Claims (3)

[Claims] 1. An endless belt shape capable of exerting a larger adhesive force on an image forming substance adhered to a surface of a sheet than on the surface of the sheet and the image forming substance. A peeling device that separates the sheet surface and the peeling member after the peeling member is brought into pressure contact to peel the image forming substance from the sheet surface, and the endless belt-shaped peeling member is brought into contact with the sheet surface. A plurality of support members that support endlessly movable in a closed path including a region, a drive roller that includes at least one support member of the support members, and a rotational drive force is transmitted to the drive roller, An image forming substance comprising: a drive source for moving the sheet endlessly; a contact position adjusting unit for adjusting a position where the drive roller and at least one edge of the endless belt-shaped peeling member start contacting each other. In the removing device, a friction coefficient of a portion of the support members other than the drive roller, which is in contact with the endless belt-shaped peeling member, of the plurality of support members is in contact with the endless belt-shaped peeling member of the drive roller. An image forming substance removing device characterized in that the friction coefficient is lower than that of a part. 2. An endless belt shape capable of exerting a larger adhesive force on an image forming substance attached to the surface of a sheet than on the surface of the sheet and the image forming substance. A peeling device that separates the sheet surface and the peeling member after the peeling member is brought into pressure contact to peel the image forming substance from the sheet surface, and the endless belt-shaped peeling member is brought into contact with the sheet surface. A plurality of support members that support endlessly movable in a closed path including a region, a drive roller that includes at least one support member of the support members, and a rotational drive force is transmitted to the drive roller, An image forming substance comprising: a drive source for moving the sheet endlessly; a contact position adjusting unit for adjusting a position where the drive roller and at least one edge of the endless belt-shaped peeling member start contacting each other. In the removing device, the friction coefficient in the direction perpendicular to the endless moving direction of the peeling member in the portion of the plurality of supporting members that contacts the endless belt-shaped peeling member is the friction coefficient in the endless moving direction in the portion. An image forming substance removing device characterized by being made lower than the above. 3. An endless belt shape capable of exerting a larger adhesive force on an image forming substance attached to a surface of a sheet than on the surface of the sheet and the image forming substance. A peeling device that separates the sheet surface and the peeling member after the peeling member is brought into pressure contact to peel the image forming substance from the sheet surface, and the endless belt-shaped peeling member is brought into contact with the sheet surface. A plurality of support members that support endlessly movable in a closed path including a region, a drive roller that includes at least one support member of the support members, and a rotational drive force is transmitted to the drive roller, An image forming substance comprising: a drive source for moving the sheet endlessly; a contact position adjusting unit for adjusting a position where the drive roller and at least one edge of the endless belt-shaped peeling member start contacting each other. In the removal device, the friction coefficient in the direction perpendicular to the endless moving direction of the peeling member on the surface of the endless belt-shaped peeling member that is in contact with the plurality of supporting members is the endless moving direction of the surface. An image-forming substance removing device characterized by having a friction coefficient lower than that.