JPH08190319A - Sheet carrying device and device for eliminating image forming material from sheet using this carrying device - Google Patents

Abstract

PURPOSE: To provide a sheet carrying device constituted so that a belt for pressing a paper is excellently prevented from being biased by giving different tension in the width direction thereof to the belt and a device using this sheet carrying device and eliminating an image forming material from a sheet. CONSTITUTION: In a drying unit 400, flange parts 403c regulating the belt 402 for pressing paper so that it is not biased to one-end sides 403b over a proper position in a shaft direction are provided on one-end sides 403b in the shaft directions of two supporting rollers 403 out of four supporting rollers supporting the belt 402. Besides, tapered parts 403d are provided on the other end sides 403a of the rollers 403 so that the length d2 of the cross section of the other end 403a becomes longer than the length d1 of the cross section of one end 403b. By making the tension given to the belt 402 smaller on the other end 403a than on one end 403b, the belt 402 is always biased in the direction of one end 403b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device used for conveying a sheet in an image forming apparatus such as a copying machine, a facsimile, a printer, a printing machine, and the like, and
A device for removing an image-forming substance from a sheet, which removes the image-forming substance from the sheet by performing at least a liquid application process on a recorded sheet on which an image-forming substance such as toner is stably attached by the image-forming device, More specifically, it relates to prevention of deviation of the belt-shaped conveying member when the belt-shaped conveying member is used for conveying the sheet.

[0002]

2. Description of the Related Art Conventionally, in an image forming apparatus or the like, as a sheet conveying apparatus used for conveying a sheet, a sheet is carried on a surface of a belt-shaped conveying member which is supported and rotated by a plurality of supporting rollers and conveys the sheet. A sheet conveying device is known.

On the other hand, from the viewpoint of effective use of resources, the image forming material is removed from the transfer paper or the like on which the image forming material such as toner is adhered and fixed using the image forming apparatus, and the transfer paper is reused. It is suggested to do so. For example, in Japanese Unexamined Patent Publication (Kokai) No. 2-55195, a heat-fusible ink or toner placed on a printed body having a support coated with a release agent by an electrophotographic method or a thermal transfer method is used to remove a belt-shaped ink from the printed body. An image forming substance removing method is disclosed in which members are stacked and passed between a heating roller and a pressure roller, and after cooling, the ink peeling member is peeled off to be attached to the ink peeling member and removed. Further, in Japanese Unexamined Patent Publication No. 4-64472, at least an endless sheet having a heat-melting resin on the surface, a heat roller and a cooling roller for supporting and rotating the endless sheet, and paper having a release treatment on the surface (erasable paper) There is disclosed an eraser including a pressing roller that presses against a softened or melted heat-melting resin, and a drive unit that moves these in conjunction with each other.

Further, the present applicant has previously proposed that a recorded sheet contains water as a destabilizing agent, an aqueous solution containing a surfactant,
At least one kind of water or an aqueous solution selected from the group consisting of an aqueous solution containing a water-soluble polymer and an aqueous solution containing a surfactant and a water-soluble polymer is held, and a peeling member is interposed to remove the image-forming substance. A method for removing an image-forming substance, which is heat-bonded or pressure-bonded to a member and peeled from a sheet, has been proposed (see, for example, Japanese Patent Application No. 4-255916).

In the apparatus for removing the image-forming substance from these sheets and the apparatus for carrying out the above-mentioned method for removing the image-forming substance, the belt-shaped ink peeling member (Japanese Patent Laid-Open No. 2-55).
195) and the above endless sheet (Japanese Patent Laid-Open No. 4-6).
No. 4472), the peeling member (Japanese Patent Application No. 4-255916) having a belt shape is moved on the surface together with the sheet while being in contact with the sheet. Correspondingly, it constitutes a part of the sheet conveying device. Further, even in such a belt-shaped conveying member, it may be necessary to prevent the belt from slipping.

[0006]

By the way, in a sheet conveying apparatus using such a belt-like conveying member,
When the belt-shaped transport member is made of fibers such as cotton fiber and chemical fiber, the belt-shaped transport member has the property of expanding and contracting when heated, absorbing liquid, or being pulled. However, there is a possibility that a so-called belt deviation may occur in which the position is displaced in the width direction of the belt, that is, in the axial direction of the supporting roller. For this reason, the support roller is given a middle height (a drum roller, a crank roller) or the like. However, there is a problem that such a belt deviation prevention measure may not be sufficient. It should be noted that the belt-shaped carrying member made of fibers such as cotton fibers and chemical fibers is difficult to obtain a predetermined length and width during molding.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sheet conveying apparatus capable of preventing the belt deviation better than in the conventional case, and a sheet using the apparatus. An image forming substance removing apparatus is provided.

[0008]

In order to achieve the above object, the invention of claim 1 is a sheet for carrying and carrying a sheet on the surface of a belt-like carrying member which is supported and rotated by a plurality of supporting rollers. In the transport device, at least one support roller of the plurality of support rollers or one end of the tension roller with respect to the belt-shaped transport member in the axial direction is brought into contact with the belt-shaped transport member so that the belt-shaped transport member is A deviation regulating member that regulates the deviation toward the one end side beyond the proper position in the axial direction is provided, and the other end of the supporting roller or the tension roller in the axial direction is provided in a direction orthogonal to the axial direction. It is characterized in that a taper whose cross section is larger at the other end than at the one end is provided.

According to a second aspect of the present invention, there is provided a sheet transporting apparatus which carries a sheet on a surface of a belt-shaped transport member which is supported and rotated by a plurality of support rollers and conveys the sheet. At least one of the plurality of support rollers is provided. One support roller or one end of the tension roller with respect to the belt-shaped transport member in the axial direction is in contact with the belt-shaped transport member, and the belt-shaped transport member moves beyond the proper position in the axial direction to the one end side. Of the support roller or the tension roller so that the urging force of the support roller or the tension roller on the belt-shaped conveying member is greater at the other end in the axial direction than at the one end. A roller or the tension roller is arranged.

According to a third aspect of the present invention, in a sheet conveying device that conveys a sheet by carrying the sheet on the surface of a belt-shaped conveying member that is rotated by being supported by a plurality of supporting rollers, at least one of the plurality of supporting rollers. One support roller or one end of the tension roller with respect to the belt-shaped transport member in the axial direction is in contact with the belt-shaped transport member, and the belt-shaped transport member moves beyond the proper position in the axial direction to the one end side. Of the support roller or the tension roller so that the urging force of the support roller or the tension roller on the belt-shaped conveying member is greater at the other end in the axial direction than at the one end. It is characterized in that the one end and the other end of the roller or the tension roller are supported via a supporting member that supports with different supporting forces of different sizes.

According to a fourth aspect of the invention, a liquid is applied to at least the image holding member to which the image forming substance is attached to remove the image forming substance from the image holding member, and then the image holding member is dried. In an apparatus for removing an image-forming substance from a sheet, which is provided with a drying means, a sheet-contacting member that comes into contact with the image-forming substance is formed into a belt shape, and the belt-like sheet contact member is the belt-like conveying member. The drying means is configured by using two or three sheet conveying devices.

[0012]

According to the first aspect of the invention, at least one of the plurality of supporting rollers or the tension roller with respect to the belt-shaped conveying member is provided with a deviation regulating member at one end in the axial direction of the tension roller. The belt-shaped conveying member that has come close to is brought into contact with the deviation regulating member,
It is regulated to go beyond the proper position in the axial direction and approach the one end side. Further, by providing the other end of the support roller or the tension roller in the axial direction with a taper whose cross section in the direction orthogonal to the axial direction is larger at the other end than at the one end, The urging force to the belt-shaped conveying member, that is, the tension becomes larger at the other end than at the one end, and the belt conveying member is
Close to one end where tension is low. Therefore, the belt conveying member approaching the one end side comes into contact with the deviation regulating member, so that the positional relationship with the supporting roller or the tension roller becomes appropriate.

According to the second aspect of the invention, at least one of the plurality of support rollers or the tension roller with respect to the belt-shaped conveying member is provided with a deviation regulating member at one end in the axial direction of the tension roller. The approaching belt-shaped conveying member comes into contact with the deviation regulating member and is regulated from moving beyond the proper position in the axial direction toward the one end side. Further, by arranging the supporting roller or the tension roller so that the biasing force of the supporting roller or the tension roller on the belt-shaped conveying member is greater at the other end in the axial direction than at the one end, the belt conveying member is arranged. Is closer to one end where the tension is lower. Therefore,
The belt conveying member approaching the one end side comes into contact with the deviation regulating member, so that the positional relationship with the supporting roller or the tension roller becomes appropriate.

According to the third aspect of the invention, at least one of the plurality of support rollers or the tension roller with respect to the belt-shaped conveying member is provided with a deviation regulating member at one end in the axial direction of the tension roller. The approaching belt-shaped conveying member comes into contact with the deviation regulating member and is regulated from moving beyond the proper position in the axial direction toward the one end side. Further, the one end of the support roller or the tension roller and the one end of the tension roller are set such that the urging force of the support roller or the tension roller on the belt-shaped conveying member is larger at the other end in the axial direction than at the one end. The other end
By supporting via the supporting member that supports with different supporting force, the belt conveying member is closer to the one end side where the tension is small. Therefore, the belt conveying member approaching the one end side comes into contact with the deviation regulating member, so that the positional relationship with the supporting roller or the tension roller becomes appropriate.

In the invention of claim 4, a liquid is applied to at least the image holding body to which the image forming material is attached, the image forming material is removed from the image holding body, and then the image holding body is dried. To do. Then, by providing a deviation regulating member at one end in the axial direction of the tension roller with respect to at least one of the plurality of supporting rollers or the belt-like conveying member, the belt-like conveying member approaching in the direction of the one end is provided. , Abuts on the deviation regulating member and is regulated from moving toward the one end side beyond an appropriate position in the axial direction.

By providing a taper on the other end in the axial direction of the support roller or the tension roller, the belt conveying member is moved toward one end side where the tension is small. Alternatively, by arranging the support roller or the tension roller so that the urging force on the belt-shaped conveying member becomes larger at the other end in the axial direction than at the one end, the belt conveying member has one end side where the tension is small. Stop by. Alternatively, the one end and the other end of the supporting roller or the tension roller are provided with supporting members having different supporting forces so that the biasing force to the belt-shaped conveying member is larger at the other end than at the one end. By supporting the belt conveying member with respect to one another, the belt conveying member comes closer to the one end side where the tension is small. Therefore,
The belt conveying member approaching the one end side comes into contact with the deviation regulating member, so that the positional relationship with the supporting roller or the tension roller becomes appropriate. (Hereinafter, margin)

[0017]

EXAMPLES Hereinafter, the present invention is a toner for removing a heat-melting toner (hereinafter referred to as a toner) as an image forming substance from a transfer paper as an image carrier on which an image is formed by a transfer type electrophotographic copying machine. An example applied to the removing device will be described. FIG. 1 is a schematic configuration diagram showing a configuration example of a toner removing device to which the present invention is applicable. First, the overall outline will be described. In this toner removing device, a sheet feeding unit 100 that separates and feeds, one by one, the transfer sheets 1 on which the toner images stored in the stacked state are formed, and a sheet feeding unit 100.
A liquid supplying unit 200 as a destabilizing liquid applying unit that applies the destabilizing liquid to the transfer paper 1 sent from the liquid transfer device 1, and a liquid supply device 220 that supplies the processing liquid 2 described later to the liquid applying unit 200. A toner peeling unit 300 as a peeling unit for peeling and removing the toner from the transfer paper 1 supplied with the destabilizing liquid; a drying unit 400 as a drying unit for drying the transfer paper 1 from which the toner has been removed; The paper receiving unit 500 receives the transfer paper 1 discharged from the drying unit 400.

In the paper feeding unit 100, the transfer papers 1 stacked on the bottom plate 101 are fed from the uppermost one to the paper feeding roller 1.
No. 02 is fed, and a double feed sheet is separated by a separating mechanism including a feed roller 103 and a separate roller 104, and only one transfer sheet 1 is sent out. The transfer sheet 1 sent out by the sheet feeding unit 100 is conveyed by the conveying roller pair 105, timing adjustment and skew correction are performed by the registration roller pair 106, and the next liquid applying unit 200 is provided.
Sent to The specific configuration and operation of the paper feeding unit 100 and the like are the same as those of the paper feeding mechanism in the electrophotographic copying machine, and therefore detailed description will be omitted.

The liquid applying unit 200 has a liquid container filled with a predetermined amount of the treatment liquid 2 as an instability liquid that makes the adhesion state of the transfer paper 1 and the toner in an unstable state, and the liquid in the liquid container. Two liquid applicators 201 and 202 are provided in the conveying direction from a liquid application roller provided so as to be partially submerged therein. Above the liquid application roller of each applicator, the paper regulating roller 2 is provided so that the surfaces thereof face each other at a predetermined interval.
03, 204 are provided. Then, in the transport direction of the transfer paper 1, the transfer paper is transported between the first-stage liquid applicator 201 and the second-stage applicator 202 and to the downstream side of the second-stage applicator 201. Relay roller pair 205, 206
Is provided. Then, each liquid applicator 201, 202
A liquid receiving tank 215 is provided below the relay roller pair 205, 206 and the like.

The treatment liquid 2 is at least one kind of water selected from the group consisting of water, an aqueous solution containing a water-soluble polymer, an aqueous solution containing a surfactant, and an aqueous solution containing a water-soluble polymer and a surfactant. Alternatively, an aqueous solution can be used.

The liquid supply device 220 is provided in the lower part of the device, and is a replaceable replenisher bottle 208 and replenisher bottle 2.
08 to the electromagnetic pump 209 to appropriately replenish the processing liquid 2, a processing liquid tank 210, a liquid supply pump 211 such as a blade pump built in the processing liquid tank 210, a pump motor 212 for rotationally driving the liquid supply pump 211, a liquid supply The processing liquid 2 discharged from the pump 211 to the liquid containers 201 and 202 and the processing liquid 2 discharged to the liquid receiving tank 215 from the liquid discharge port provided at the bottom of the liquid containers 201a and 202a are processed. It is composed of a recovery pipe 214 and the like for returning it into the liquid tank 210. Here, the liquid supply pump 211
The processing liquid 2 sent by is passed through the liquid supply pipe 213 and supplied to the liquid containers of the liquid applicators 201 and 202. And
The processing liquid 2 flowing out of the liquid container and received by the liquid receiving tank 215 is returned to the processing liquid tank 210 through the recovery pipe 214 and circulated. During such a steady circulation operation of the treatment liquid 2, in each of the liquid applicators 201 and 202, the liquid supply roller 211 supplies the liquid so that the liquid application roller is immersed in the treatment liquid 2 in the liquid container by a predetermined amount. Liquid volume etc. are set.

The toner peeling unit 300 includes a toner offset belt (hereinafter referred to as an offset belt) 301 as a belt-shaped peeling member wound around a plurality of supporting rollers 302, 303 and the like, and an offset belt 3.
Heating block 304 and upper heating roller 305 with a built-in heating lamp provided so as to be pressed against each other with 01 interposed therebetween.
A tension roller 306 that applies a predetermined tension to the offset belt 301, a cleaning brush 307 that rotates while contacting the surface of the offset belt 301 to remove toner, and a toner receiver that receives the toner removed by the cleaning brush 307. And 308.

Here, the heating block 304 and the upper heating roller 305 bring the toner image surface of the transfer paper 1 into close contact with the offset belt 301 and heat the toner adhered to the transfer paper 1 to soften it. .

Further, at least the surface of the offset belt 301 on the side in contact with the toner 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 1 and the toner. Has been done. For example,
The belt itself is formed of a metal material such as an aluminum-based material, a copper-based material, a nickel-based material, or a polymer-based material such as polyethylene terephthalate (PET) in which titanium oxide is dispersed. Further, the offset belt 16 may be composed of a plurality of layers, at least one of which may be a heat-resistant layer having excellent strength and heat resistance, and the layer in contact with the toner may be an adhesive layer having excellent adhesion to the toner.

Further, on the downstream side in the moving direction of the offset belt 301 from the pressure contact portion with the upper heating roller 305 of the heating block 304, a bent portion for changing the moving direction of the offset belt 301 by about 90 degrees with a predetermined radius of curvature. Around the bent portion, the moving direction of the belt is rapidly changed to separate the curvature of the transfer paper 1 from the offset belt 301.

The drying unit 400 is for drying the transfer paper 1 so that, for example, the liquid holding amount of the transfer paper 1 is 10% or less of the paper weight, and includes a heating drum 401 having a built-in heating lamp and made of, for example, aluminum. It is composed of a paper pressing belt 402 as a belt-like sheet contact member that is wound around a plurality of support rollers and moves endlessly while being wound around the peripheral surface of the heating drum 401 at a constant angle.
As the material of the paper pressing belt 402, a material having heat resistance and air permeability, for example, cloth such as canvas cloth, cotton cloth, and Tetron cloth can be used. The drying unit 400 will be described in detail later.

The paper receiving unit 500 includes a pair of conveying rollers 501 for conveying the transfer sheet 1 from the drying unit 400, a branch claw 502, and a pair of discharge rollers 503, 50.
4, built-in paper ejection tray 505, external paper ejection tray (not shown)
If necessary, the built-in paper discharge tray 50
5 or the discharge to the external discharge tray can be selected. Here, the built-in discharge tray 505 is slidable so that it can be pulled out to the front side of the apparatus.

In the toner removing apparatus having the above structure, the transfer paper 1 sent from the paper feeding unit 100 is processed by the liquid applying unit 200 on the toner image surface (the lower surface in the drawing) of the processing liquid 2.
Is sent to the toner peeling unit 300. For example, the transfer liquid 1 of A4 size is applied with 2 g or more of the treatment liquid 2. With this toner peeling unit 300, the transfer paper 1
The toner stuck to the toner is softened by heating from the heating block 304 and the upper heating roller 305, and the offset belt 3
01 It adheres to the surface. Then, when the transfer paper 1 and the offset belt 301 are separated from each other around the bent portion of the heating block 304, the toner attached to the surface of the offset belt 301 is separated from the transfer paper 1, thereby removing the toner from the transfer paper 1. To be done. The transfer paper 1 from which the toner has been removed is dried by the drying unit 400, and is discharged onto the built-in discharge tray 505 of the paper receiving unit 500 by the discharge roller pair 503. By the above toner removal processing, since the liquid is supplied to the transfer paper 1 to which the toner is attached and the liquid is permeated into the interface of the transfer paper 1 with the toner, the toner is peeled off, so that the paper fiber is not damaged. Toner can be removed.

Next, the structure of the drying unit 400 used in the toner removing device will be described in more detail with reference to FIG. In the drying unit 400, the paper pressing belt 4
As the four support rollers 412 that bridge 02, the support rollers 412 having the same cross-sectional length in the direction orthogonal to the axial direction of the rollers 412 from one end to the other end are used. In addition, the transfer paper 1 from the toner peeling unit 300
A pair of guide plates 414 are provided above the heating drum 401 in order to intrude from above into the holding and conveying region, which is the pressure contact portion between the paper pressing belt 402 and the heating drum 401.
In addition, in order to prevent the transfer paper 1 from being completely separated from the heating drum 401 during discharging and jamming,
A separation claw 416 is provided so that the tip of the claw touches or approaches. Further, in the figure, a thermistor 417 for controlling the heating lamp 401a in the heating drum 401 is provided near the surface of the heating drum 401.

By the way, in the drying unit 400, the paper pressing belt 402 as the sheet conveying member is
Since the four support rollers 412 are wound around and rotated, there is a risk that the belt will shift toward the belt. In particular, in the toner removing apparatus of this embodiment, the heating drum 401 is arranged so as not to be easily spread between the support members 412 of the paper pressing belt 402, so that the belt 402 tends to shift. .

That is, when the heating drum 401 is arranged in this manner, the heating drum 401 becomes a resistance against the movement of the paper pressing belt 402, and the frictional force between the heating drum 401 and the belt 402 is not uniform in the width direction. Can cause belt slippage. Also, this heating drum 401
The frictional force of the belt 402 also depends on the wetting amount of the transfer paper 1. Therefore, the unevenness of the wetting amount of the transfer paper 1 in the width direction may cause the belt deviation.

When tensions of different magnitudes are applied to the paper pressing belt 402 in the direction orthogonal to the belt surface movement direction, that is, in the width direction, the belt tends to be closer to the smaller tension.

Therefore, the drying unit 4 in this embodiment
00, at least one of the four support rollers 412 is configured to be capable of energizing the paper transport belt 402 with different tensions in the width direction. ing.

The drying unit 40 in this embodiment will be described below.
0 will be described with reference to FIGS. 2 and 3. In the drying unit 400 shown in FIGS. 2 and 3, the four support rollers 412 that support the paper pressing belt 402 are rotatably supported by fitting the shaft portions at both ends to, for example, protrusions fixed to the side wall of the apparatus. , Are arranged so that their respective axes are parallel to each other. Of the four support rollers 412,
A flange portion 403c as a deviation regulating member is provided on one axial end 403b side of the two support rollers 403.
The flange portion 403c has one end 40 of the paper pressing belt 402.
When the belt 402 comes close to the direction 3b, it comes into contact with the belt 402 and restricts the belt 402 from going beyond the proper position in the axial direction toward the one end 403b side.

The support roller 403 has one end 403.
From the length d ₁ of the cross section in the direction orthogonal to the axial direction of b,
A taper portion 403d is provided on the side of the other end 403a such that the length d ₂ of the cross section of the other end 403a in the axial direction is longer, and the taper portion 403d extends from the one end 403b to the other end 403a. The length of the cross section gradually increases. That is, in the tapered portion 403d, the length of the cross section gradually decreases from the other end 403a to the one end 403b. The remaining two support rollers 412 have the same cross-sectional length from one end to the other end in the axial direction.

As shown in FIG. 3, at the position where the taper portion 403d is provided on the side of the other end 403a of the support roller 403, the paper pressing belt 402 is provided with the flange portion 40 at one end edge in the width direction.
3c and the two supporting rollers 403 and the remaining 2
When the belt 40 is wound around the supporting roller 412,
It is a position where it can contact 2.

The support roller 403 has one end 40
Since the length of the cross section of 3b is smaller than the length of the cross section of the other end 403a, the magnitude of the tension for urging the paper pressing belt 402 at the one end 403b and the other end 403a is 40 mm.
The other end 403a is smaller than 3b. Also, at the taper portion 403d, the other end 403a to the one end 403
Since the length of the cross section gradually decreases toward b, the tension for urging the paper pressing belt 402 is increased by the other end 40.
It gradually decreases from 3a toward one end 403b.

Therefore, the tension of the paper pressing belt 402 stretched over the two supporting rollers 403 and the remaining two supporting rollers 412 becomes small in the axial direction of the rollers 403, that is, in the belt width direction. The above-mentioned collar part 4
03c is always provided in the direction of the one end 403b (direction indicated by arrow b in the figure). Then, the paper pressing belt 402 approaching in the direction of the one end 403b is provided with the collar portion 40.
By contacting with 3c, it is regulated that the support roller 403 does not go beyond the proper position in the axial direction toward the one end 403b side, and the positional relationship with the support roller 403 is properly maintained. Therefore, in the drying unit 400 shown in FIG. 2 and FIG. 3, the belt deviation can be prevented more favorably than the conventional drying unit.

In the drying device shown in FIGS. 2 and 3, the paper pressing belt 402 is located on the support roller 403 in the width direction of the support roller 403 in the width direction of the flange 403c, that is, toward the one end 403b. In order to prevent the transfer paper 1 from protruding out of the width when the length becomes the minimum, the minimum width of the belt 402 is set longer than the width of the transfer paper 1 and the transfer paper 1 The entry position from the toner peeling unit 300 to the paper pressing belt 402 is set. Accordingly, it is possible to prevent the belt 402 from meandering due to the transfer paper 1 protruding from the width of the belt 402, and it is possible to use the belt 402 up to its minimum width.

4 and 5 show a plurality of support rollers 412.
3 shows a drying unit 400 in which at least one of the supporting rollers is arranged so as to apply different tensions in the width direction to the paper transport belt 402. Note that the description of the drying unit shown in FIGS. 2 and 3 is applied to points that are not particularly described.

In the example of FIG. 4, four support rollers 412 (however, one support roller is not shown) supporting the paper pressing belt 402 are cross-sectioned from one end to the other end in the axial direction. Rollers 4 having the same length
12 is used. Further, one support roller 404 among the four support rollers 412 is provided at one end side thereof with a flange portion 404c similar to the support roller 403 in FIGS.

In the example of FIG. 4, the supporting roller 4
The remaining three support rollers 412 except 04 are arranged so that their respective axes are parallel to each other, and the support roller 404 is not parallel to the respective axes of the three support rollers 412. It is arranged as follows. Specifically, the three support rollers 412 and the support rollers 40
The paper pressing belt 402 wound around 4 is, for example, the peripheral length L ₁ on the other end 404a side located on the front side of the support roller 404 in the figure, and the peripheral length L ₂ on the one end 404b side located on the rear side. The support roller 404 is arranged so as to be longer than that. On the support roller 4040 thus arranged,
In the paper pressing belt 402, the magnitude of the tension urged by the roller 404 is 40 at one end than at the other end 404a.
4b is smaller. Therefore, the paper pressing belt 402 always approaches in the direction of the one end 404b. Then, the paper pressing belt 40 approaching in the direction of the one end 404b.
By contacting the collar portion 404c, the second end portion 404 of the support roller 404 moves beyond the proper position in the axial direction of the support roller 404.
Proximity to the side of b is restricted, and the positional relationship with the support roller 404 is appropriately maintained.

In the example of FIG. 5, the shaft portions of the other end 405a and one end 405b of one support roller 405 among the four support rollers 412 are respectively supported by the support members. In the illustrated example, the support member engages with a spring S whose one end 405b is attached to the side wall of the toner removing device and the other end of the spring S at a substantially central portion in the longitudinal direction, and is provided in a hole provided at one end 468b. An arm 41 rotatably attached in the direction of arrow c in the figure via the inserted pin P ₂ .
8 and a pin P ₁ which is inserted into a hole formed in the other end 418a of the arm 418.

Then, the support roller 405 has the other end 405.
The shaft portion of a is supported by the arm 418 via the pin P ₁ inserted through the hole in the other end 418a, and the pin P ₁
It is possible to rotate around. The support roller 40
Similarly, the shaft portion of the one end 405b of No. 5 is also supported by the arm 418.

In the example of FIG. 5, the other end 405a and the one end 405b of the support roller 405 are respectively supported by the arms 418 engaged with the spring S having different spring forces, that is, different spring forces. , The tension applied to the paper pressing belt 402 is different,
The circumference of the belt 402 includes the other end 405a and one end 405b.
You can make a difference with and. For example, when the arm 418 supporting the other end 405a is engaged with the spring S having a larger spring force than the arm 418 supporting the one end 405b, the other end 405a is more than the one end 405a.
A large tension is applied to the belt portion located at, the circumference of the other end 405a becomes longer than the circumference of the one end 405b, and the one end 405b becomes closer to the paper pressing belt 402 than the other end 405a. The amount of tension applied is small. Therefore, the paper pressing belt 40 wound around the three supporting rollers 412 and the supporting rollers 405.
2 is always closer to the one end 405b having a shorter circumference and abuts on the collar portion 405c provided on the one end 405b. By this contact, the paper pressing belt 402
Is restricted from moving beyond the proper position in the axial direction of the support roller 405 toward the one end 405b side.
The positional relationship with 05 is properly maintained.

[0046]

According to the first aspect of the present invention, at the other end of the predetermined roller provided with the deviation regulating member at one end in the axial direction, the taper in which the cross section on the one end side is larger than the cross section on the other end side. Is provided and the biasing force to the belt-shaped transport member at the other end is made larger than that at the one end, so that the belt transport member is brought closer to the one end side where the biasing force is small and abuts against the deviation regulating member. Since the positional relationship with the predetermined roller is made appropriate, there is an effect that the belt deviation can be prevented more favorably than in the conventional case.

According to the second aspect of the present invention, the predetermined roller is provided with the deviation regulating member at one end in the axial direction, and the urging force to the belt-shaped conveying member is greater at the other end than at the one end in the axial direction. By arranging the predetermined roller so that the belt-shaped conveying member is larger than the one end, the urging force to the belt-shaped conveying member at the other end is larger than that at the one end side. Since it is brought into contact with the deviation regulating member to make the positional relationship with the predetermined roller proper, it is possible to prevent the belt deviation better than in the conventional case.

According to the third aspect of the present invention, the predetermined roller is provided with the deviation regulating member at one end in the axial direction, and the urging force to the belt-shaped conveying member is greater at the other end than at the one end in the axial direction. The one end and the other end of the predetermined roller are respectively supported via supporting members having different supporting forces so that the predetermined roller is made larger, and the belt-like conveyance of the other end than the one end is performed. By increasing the urging force to the member, the belt conveying member is moved toward one end side where the urging force is small and brought into contact with the deviation regulating member, and the positional relationship with the predetermined roller is made appropriate. Compared with this, there is an effect that the belt deviation can be prevented satisfactorily.

According to the invention of claim 4, claims 1 to 3
In addition to the above effect, the belt deviation is prevented better than in the conventional case, so that the sheet with the liquid adhered thereto can be dried more stably than in the conventional case.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a configuration example of a toner removing device to which the present invention is applicable.

FIG. 2 is a front view showing a schematic configuration of a drying unit used in the toner removing device.

FIG. 3 is a right side view of the drying unit.

FIG. 4 is a perspective view showing a schematic configuration of a drying unit according to another configuration example.

FIG. 5 is a right side view showing a schematic configuration of a drying unit according to still another configuration example.

[Explanation of Codes] 300 Peeling Unit 400 Drying Unit 401 Heating Drum 402 Paper Pressing Belt 412 Support Roller 403c Collar 403d Taper 416 Separation Claw 418 Arm S Spring

Claims (4)

[Claims] 1. A sheet conveying device for carrying a sheet on a surface of a belt-shaped conveying member which is supported and rotated by a plurality of supporting rollers and conveys the sheet, wherein at least one supporting roller of the plurality of supporting rollers or the supporting roller is provided. An offset that contacts one end of the tension roller with respect to the belt-shaped conveying member in the axial direction and contacts the belt-shaped conveying member to prevent the belt-shaped conveying member from moving beyond the proper position in the axial direction toward the one end side. A regulating member is provided, and a taper is provided at the other end of the support roller or the tension roller in the axial direction so that the cross section in the direction orthogonal to the axial direction is larger at the other end than at the one end. A sheet conveying device characterized by: 2. A sheet conveying device for conveying a sheet by carrying the sheet on the surface of a belt-shaped conveying member which is supported and rotated by a plurality of supporting rollers, wherein at least one supporting roller of the plurality of supporting rollers or the supporting roller is provided. An offset that contacts one end of the tension roller with respect to the belt-shaped conveying member in the axial direction and contacts the belt-shaped conveying member to prevent the belt-shaped conveying member from moving beyond the proper position in the axial direction toward the one end side. The support roller or the tension roller is provided with a restriction member, and the biasing force of the support roller or the tension roller on the belt-shaped conveying member is greater at the other end in the axial direction than at the one end. A sheet conveying device, in which a sheet is arranged. 3. A sheet conveying device for conveying a sheet by carrying a sheet on the surface of a belt-shaped conveying member which is supported and rotated by a plurality of supporting rollers, wherein at least one supporting roller of the plurality of supporting rollers or the supporting roller is provided. An offset that contacts one end of the tension roller with respect to the belt-shaped conveying member in the axial direction and contacts the belt-shaped conveying member to prevent the belt-shaped conveying member from moving beyond the proper position in the axial direction toward the one end side. The support roller or the tension roller is provided with a restriction member, and the biasing force of the support roller or the tension roller on the belt-shaped conveying member is greater at the other end in the axial direction than at the one end. A sheet conveying device, wherein the one end and the other end of the sheet are supported via supporting members having different supporting forces. 4. A drying means is provided for applying a liquid to at least an image holding member to which an image forming substance is attached, removing the image forming member from the image holding member, and then drying the image holding member. The sheet according to claim 1, 2 or 3, wherein in the apparatus for removing an image-forming substance from a sheet, the sheet contact member that comes into contact with the image-forming substance is formed into a belt shape, and the belt-like sheet contact member is the belt-like conveying member. An apparatus for removing an image-forming substance from a sheet, characterized in that the drying means is constituted by using a conveying device.