JPH07291479A - Paper guide device - Google Patents

Abstract

PURPOSE:To preclude the toner or dust attached to a rib from being transcribed on a sheet of paper fed later and prevent the toner on the sheet from attaching to rib. CONSTITUTION:A rib 2 is made movable in the directions of arrows b, c and moved between the condition protruded to the inside circumferential surface of a paper guide body 1 and the condition retreated from the inside surface of the guide body 1, and toner, dust, etc., attached to the rib 2 is shaken off by shocks given associate with the movement. Such a phenomenon that a fixed part of a sheet 7 comes in contact with the rib 2 continuously, is precluded by moving the rib 2 during the transport of the sheet, and the toner on the surface of the sheet 7 is prevented from exfoliating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper guide device provided in a document feeder of a copying machine or the like and for guiding the conveyance of paper.

[0002]

2. Description of the Related Art In copying machines, laser printers, and the like, a paper guide is used to form a conveyance path for originals and paper. In such a paper guide, in order to reduce friction with the paper, ribs are formed on the surface to reduce the contact area between the paper and the paper guide. In particular, in the portion where the paper is changed in a U-turn shape, the paper is changed in the form of being pressed by the paper guide, so that the formation of the rib is indispensable in order to prevent the occurrence of jam. An example of forming ribs is, for example, Japanese Utility Model Publication No. 55-45385, in which ribs (projections) are formed on the surface of the U-turn portion of the paper guide.

[0003]

When the ribs are provided on the paper guide as described above, there is an advantage that the friction between the conveyed paper and the paper guide is reduced and the jam is less likely to occur. However, in this configuration, since the ribs of the paper guide intensively contact the paper, there is a problem that dust, dirt, and the like are concentrated and adhere to the ribs.

In particular, in a device that conveys a sheet on which a toner image is formed so that the toner image surface is in contact with the rib side, the toner adheres to the rib, and this toner is further conveyed to the sheet that is subsequently conveyed. There is a problem in that the sheet is transferred and stains the sheet. In the U-turn section, since the paper is changed in its course, the paper is pressed against the paper guide with a strong force, and a part of the paper is concentrated and rubbed against the ribs, so that the toner is easily peeled off.

As a specific example of the apparatus for conveying the above-mentioned paper on which the toner image is formed so that the toner image surface is in contact with the rib side, the original (paper on which the toner image is formed) is circulated in a copying machine. Circulating document feeder (Recy)
ecling Document Handler: hereinafter referred to as RDH). The RDH is configured to repeatedly circulate and feed one document and perform a copy process each time when a plurality of copies are to be made. Since one document is repeatedly fed in the same circulation path, the document is copied. The same part of each touches the rib in almost the same way every time. For this reason, the rib contact portion of the document is concentrated and rubbed, and the toner is easily peeled off. Further, in the RDH, the toner attached to the ribs is transferred to the image surface of the subsequent document, so that when the document is copied after that, even the transferred stains are copied to form a copy image. Create a spot. In particular, the toner adhering to the ribs gradually grows and becomes a large toner mass, which is transferred to the subsequent document, so that the spots on the copy image become large and the image quality is deteriorated.

In view of the above problems, the present invention removes the toner and dust adhering to the ribs to prevent these stains from being transferred to the paper, and the toner itself adhering to the ribs itself. An object of the present invention is to provide a paper guide device capable of preventing the above.

[0007]

According to a first aspect of the present invention, there is provided a paper guide main body which is composed of a plate-like member bent in a U shape and along which an inner peripheral surface of the paper is conveyed, and the paper. A groove-shaped rib loose insertion portion formed along the paper transport direction in at least a U-shaped bent portion of the guide body, and a rib loose insertion portion of the bent portion facing the outer peripheral surface side of the paper guide. And a position where the rib is projected to the inner peripheral surface of the paper guide body,
Rib moving means for moving between a position retracted to the outer peripheral surface of the paper guide body and the position is provided.

According to a second aspect of the present invention, in the paper guide apparatus according to the first aspect, there is provided means for intermittently operating the rib moving means during conveyance of one sheet of paper. .

According to a third aspect of the invention, in the paper guide device according to the first or second aspect, the rib surface is cleaned along the groove-shaped rib loose insertion portion on the outer peripheral surface of the paper guide body. A cleaning material for performing the above is provided.

[0010]

According to the first aspect of the invention, the rib can be moved by the rib moving means, and the rib extends to the inner peripheral surface of the paper guide main body and the outer peripheral surface of the paper guide main body. It is moved between the retreat position and.
When the ribs are located at the inner peripheral surface of the paper guide body and the paper is conveyed along the inner peripheral surface of the paper guide, the paper moves along the ribs, so there is little friction and smoothness. Will be transported to. At this time, if a toner image is formed on the rib surface side of the sheet, the toner adheres to the rib surface due to friction between the sheet and the rib. In addition, dust other than toner adheres to the surface of the rib. However, when the ribs are moved to the outer peripheral surface of the paper guide body by the rib moving means, the attached toner spills from the rib surface due to the impact during the movement, and the toner, dust and the like are removed from the rib surface.

According to the second aspect of the present invention, between the position where the rib projects to the inner peripheral surface of the paper guide main body and the position where the rib retracts to the outer peripheral surface of the paper guide main body during conveyance of one sheet of paper. It is moved intermittently in. By the operation of the ribs, even if toner, dust, or the like adheres to the surface of the ribs, the ribs are spilled off, so that the rib surface can be in a clean state. Further, according to this configuration, the ribs are intermittently moved during the transportation of one sheet of paper, whereby the contact state between the transported sheet and the ribs changes. In other words, during the transportation of one sheet, the sheet and the ribs repeatedly contact / non-contact with each other. Therefore, for example, in RDH or the like, even if one sheet is repeatedly transported, a stress is applied from the ribs. Changes, the toner is less likely to be peeled off, and the toner is less attached to the ribs.

According to the third aspect of the present invention, when the rib is moved to the outer peripheral surface of the paper guide body by the rib moving means and when the rib is moved from the outer peripheral surface of the paper guide body to the inner peripheral surface side, The rib surface is cleaned with a cleaning material. That is, the toner, dust and the like adhering to the rib surface are removed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 7 are views relating to the embodiments of claims 1 and 2.

FIG. 1 is a diagram showing a cross-sectional structure of a paper guide device according to an embodiment of the present invention. FIG. 1 (A) shows a state in which ribs project from the inner peripheral surface of the paper guide body, and FIG. ) Shows a state where the rib is retracted to the outer peripheral surface of the paper guide main body, and FIG. 7B shows an intermediate state between them. Figure 2
1A is a cross-sectional view of the a-plane of FIG. 1A in the vertical direction in the figure, and FIG. 2B is a cross-sectional view of the a-plane of FIG. 1C in the vertical direction in the figure. FIG. 3 is a perspective view showing the appearance of the vicinity of the rib of the paper guide device.

The paper guide device includes a paper guide body 1 bent in a U shape, ribs 2, an actuator 3 for moving the ribs 2, and a paper sensor 6.

The paper guide body 1 is formed by bending a plate-shaped member made of a plastic material, a stainless steel material, or the like into a U-shape, and the paper is conveyed along the inner surface of the U-shape. The paper guide body 1 is provided with groove-shaped rib loose insertion portions 4a and 4b along the U-shaped curved portion. In this embodiment, two rib loose insertion portions 4a and 4b are formed, but the number of rib loose insertion portions is not limited to this.

The rib 2 is formed by forming R on one side of the plate-like member so as to substantially follow the curved surface of the paper guide main body 1. The R forming portion 2a is a rib loose insertion portion of the paper guide main body 1. It is loosely inserted in the portions 4a and 4b.

The actuator 3 has an R forming portion 2 of the rib 2.
R of the rib 2 is provided on the working side 2b, which is the side opposite to a.
As shown by the arrows b and c in the figure, the forming portion 2a is projected to the inner peripheral surface of the paper guide 1 (direction of arrow b), and
The paper guide 1 is moved to a position (in the direction of arrow c) on the outer peripheral surface retracted from the inner peripheral surface (rib moving means).

The actuator 3 can be composed of, for example, a solenoid, an electromagnet, a cam or the like.

FIG. 4 shows an example in which the actuator is composed of a solenoid. As shown in FIG. 4, the solenoid 3
The operating piece 31b of 1a is fixed to the working side 2b of the rib 2, and when the solenoid 31a is turned on, the rib 2 is moved to the arrow c.
When the solenoid 31a is turned off, the pulling force is released. Further, one end of a compression spring 31c is attached to the working side 2a of the rib 2. The other end of the compression spring 31c is fixed to a device body (RDH body or the like) including the paper guide device. With this configuration, when the solenoid 31a is in the off state, the rib 2 is projected to the inner peripheral surface of the paper guide body 1 by the pressing force of the compression spring 31c as shown in FIG. 4 (A). When the solenoid 31a is turned on,
The rib 2 has an arrow c against the pressing force of the compression spring 31c.
4B, and is retracted from the inner peripheral surface of the paper guide body 1 as shown in FIG. The rib 2 is moved as described above.

FIG. 5 shows an example in which the actuator is an electromagnet. As shown in FIG. 5, in this example, two electromagnets 32a and 32b are arranged at a predetermined interval. This distance substantially matches the moving distance of the rib 2. One end of the connecting rod 32c is fixed to the working side 2b of the rib 2. A vibration plate 32d is attached to the other end of the connecting rod 32c. The vibrating plate 32 is made of a magnetically attractable metal plate, and is supported between the electromagnets 32a and 32b so as to be movable between the electromagnets. Therefore,
When the electromagnets 32a and 32b are alternately turned on / off, the diaphragm 32d accordingly moves in the directions of arrows b and c. The rib 2 moves in the directions of the arrows b and c due to the movement of the diaphragm 32d.

FIG. 6 shows an example in which the actuator is composed of a cam. The cam is an eccentric cam 33a, and the peripheral surface of the elliptical eccentric cam 33a is brought into contact with the working side 2b of the rib 2. A rotation shaft 33c of the eccentric cam 33a is rotatably supported by a main body having a paper guide device, and a rotational force is transmitted via a drive system (not shown). One end of a tension spring 33b is attached to the working side 2b of the rib 2. The other end of the tension spring 33b is fixed to an RDH main body or the like including a paper guide device. The operation will be described. When the eccentric cam 33a rotates and the long diameter side of the eccentric cam 33a faces the working side 2b side of the rib 2, as shown in FIG. 6 (A), the rib 2 resists the pulling force of the pulling spring 33b, and is indicated by an arrow mark. The ribs 2 are pressed in the b direction, and the ribs 2 project to the inner peripheral surface of the paper guide body 1. On the other hand, when the shorter diameter side of the eccentric cam 33a comes into contact with the working side 2b of the rib 2, the rib 2 is pulled by the tension spring 33b and moves in the direction of arrow c, as shown in FIG. It is retracted from the inner peripheral surface of the paper guide 1.

The rib 2 is moved as described above. Then, the rib 2 vibrates due to the impact during movement,
As a result, even if toner or dust adheres to the rib 2, they are removed.

The paper sensor 6 is arranged in the conveying direction of the paper 7 (see FIG. 1).
It is arranged on the upstream side of the rib 2 in the direction of the middle arrow d). The paper sensor 6 is composed of, for example, a reflection type optical sensor, and detects the leading end and the trailing end of the paper by the change of the incident light to the light receiving side sensor. In the case of a reflection type optical sensor, when there is no incident light and when there is incident light (detection of reflected light from the paper), the passage of the leading edge of the paper is judged, and when there is change from when there is incident light to when there is no incident light, Determine the passage.

When constructing the paper guide device,
As shown in FIG. 1 (A), a paper guide 5 may be arranged inside the paper guide body 1 provided with the ribs 2 for guiding the conveyance of the paper from the inside.

The operation during sheet conveyance will be described. FIG. 7 is a flowchart showing a processing procedure during sheet conveyance.

First, in a normal state, the rib 2 has the shape shown in FIG.
As shown in (A), the ribs are projected from the loose insertion portions 4a and 4b. Here, when the paper sensor 6 detects the leading edge of the paper, the timer measures T1 time (n1 → n2). During this period, as shown in FIGS. 1A and 2A, the paper 7 is partially lifted from the paper guide main body 1 by the ribs 2, and the paper guide 1 and the ribs 2 and the paper 7 are removed. Since there is little contact surface with, there is little friction. However, if this state continues, a predetermined portion of the paper 7 will continue to be rubbed, and toner will easily peel off from the surface of the paper 7. Therefore, it operates as follows.

When the timer T1 times out, the actuator 2 causes the rib 2 to move in the direction of arrow c (n3 → n4). Then, as shown in FIGS. 1 (B), 1 (C) and 2 (B), the rib 2 is retracted from the inner peripheral surface of the paper guide main body 1 and the paper 7 is brought into close contact with the paper guide main body 1. Transport. In this state, the contact surface between the paper guide main body 1 and the paper 7 is large and friction is increased, but since the toner on the surface of the paper 7 is not rubbed by the ribs 2, toner peeling hardly occurs. In this state, after being conveyed for T2 time, the rib 2 moves again in the direction of the arrow b and returns to the state of FIG. 1 (A) and FIG. 2 (A) (n4
→ n5).

The rib 2 has the paper guide body 1 as described above.
The state in which the rib 2 protrudes from the inner peripheral surface and the state in which the rib 2 retracts from the inner peripheral surface of the paper guide body 1 are repeated until the trailing edge of the sheet is detected, that is, while one sheet of paper is conveyed. (N6). This allows the ribs 2 to be fed during the transportation of one sheet.
By the state of being lifted from the paper guide body 1,
The state where the rib 2 is not rubbed is repeated. If the two states are repeated in this way, the paper 7 will not remain in close contact with the paper guide body 1,
Paper jam does not occur. Moreover, since the time during which the surface of the paper 7 is rubbed by the ribs 2 is shortened, toner peeling from the surface of the paper 7 is less likely to occur, and the amount of toner adhering to the ribs 2 can be reduced and the surface of the paper 7 can be removed. Toner image damage can be reduced.
Further, by moving the rib 2 in the directions of the arrows b and c, it is possible to remove the toner, dust, and the like adhering to the surface of the rib 2 due to the impact during the movement. As a result, the surface of the rib 2 can be cleaned and the rib 2
It is possible to prevent the transfer of toner, dust, and the like from the sheet to the sheet 7.

An embodiment of claim 3 will be described.

FIG. 8 shows the rib loose insertion portion 4 of the paper guide device.
It is sectional drawing which shows the structure of the vicinity of a and 4b. In the figure,
The same parts as those in the above embodiment are designated by the same reference numerals, and the description will be omitted.

Brushes 8 are attached to the outer peripheral surfaces of the rib loose insertion portions 4a and 4b by means of attachments 9. The brushes 8 are mounted so as to face each other from above and below the rib loose insertion portions 4a and 4b, and the distance between the upper and lower brushes is set to be about the thickness of the rib 2. As a result, as shown in FIGS. 8A and 8C, when the rib 2 moves in the direction of the arrow c and the direction of the arrow b, the brush 8 comes into contact with the surface of the rib 2, whereby the rib 2 is moved. Toner, dust, etc. adhering to the surface of the are wiped off. Thus, by providing the brush 8, it is possible to almost certainly remove the toner and dust on the surface of the rib 2.

FIG. 9 is a diagram showing another embodiment according to claim 3. In FIG.

In this embodiment, the brush 8 is movably supported in the vertical direction. The attachment 91 of the brush 8 has an L-shaped cross section.
The brush 8 is formed in a character shape, and the brush 8 is attached to the end of one piece and the roller 92 is rotatably attached to the end of the other piece. The attachment 91 is pressed against the surface of the rib 2'by a spring 93. On the other hand, the rib 2'is configured such that the front end portion is thin and the rear end portion is thick, and the central portion is formed in a slope shape so as to connect the thin portion and the thick portion. The rib 2'is different from the rib 2 of the above-described embodiment only in the thickness and shape, and the structure for operation is the same.

With the above structure, the brush 8 operates as follows. In FIG. 9 (A), the rib 2'is the paper guide body 1
2 shows a state in which the roller 92 of the attachment 91 is pressed against the thin portion of the tip end portion of the rib 2 '. Therefore, the tips of the upper and lower brushes 8 are close to each other. Next, when the rib 2'starts to move in the direction of the arrow b, the roller 92 moves along the surface of the rib 2'until the tip of the rib 2'passes between the upper and lower brushes 8. Keeps that state. This is the state shown in FIG. At this time, the surface of the rib 2'is cleaned by the brush 8 and the toner, dust, etc. on the surface of the rib 2'are wiped off. After that, when the rib 2'moves further in the direction of the arrow b and comes into a protruding state from the rib loose insertion portions 4a, 4b, the roller 92 goes up the slope of the surface of the rib 2 ',
Reach the thicker part of the rear end. Then, as shown in FIG. 9C, the space between the upper and lower brushes 8 widens against the biasing force of the spring 93, and the brushes 8 do not contact the ribs 2 '. In this way, when the brush 8 makes repeated contact / non-contact with the surface of the rib 2 ′, toner, dust, etc. adhering to the surface of the brush 8 fall off from the brush surface during the repetition. Therefore, the cleaning effect of the brush 8 is improved. Incidentally, the falling toner or the like can be prevented from being contaminated in the apparatus such as the RDH main body by providing a collecting section below to collect the toner.

In the above embodiment, the brush is used as an example of the cleaning material for cleaning the surface of the rib, but a blade, a fur or the like may be used.

Another embodiment of the present invention will be described.

FIG. 10 is a diagram showing a sectional structure in the vicinity of the rib. In the figure, the same parts as those in the above embodiment are designated by the same reference numerals.

A suction chamber 11 in which the rib 2 is arranged is provided on the outer periphery of the rib loose insertion portions 4a and 4b.
1, a suction fan 10 is connected. The suction chamber 11 is
It is hermetically sealed at the contact surface with the paper guide body 1 so that the air flow does not leak. Rib loose insertion parts 4a, 4b
Then, the rib 2 is loosely inserted with a margin. When the suction fan 10 is operated with this configuration, a flow of air is generated along the peripheral surface of the rib 2 as indicated by the arrow in the figure.
The air flow removes toner, dust, and the like on the surface of the rib 2.

In this structure, even if the rib 2 is not moved,
It is possible to remove toner, dust, etc. on the surface of the rib 2. Therefore, it is not necessary to move the rib 2 in consideration of only removing the toner and dust on the surface of the rib 2. On the other hand, it is preferable that the rib 2 moves in consideration of preventing the toner from peeling off due to the contact between the rib 2 and the paper. Whether or not the rib 2 is moved may be appropriately selected depending on the device, and when the rib 2 is moved, it can be configured in the same manner as the example shown in FIGS. 1 to 7. In that case, the actuator may be provided inside or outside the suction chamber 11.

The cleaning operation of this embodiment is
It is executed when the paper is not passing through the part of the paper guide body 1. The specific timing is, for example, after the paper sensor 6 detects the trailing edge of the paper. By performing the cleaning when the paper is not passing, it is possible to prevent the suction operation from affecting the conveyance of the paper. Also,
If the cleaning is performed every time the paper sensor 6 detects the trailing edge of the paper, the rib 2 can be always maintained in a clean state.

Still another embodiment will be described.

FIG. 11 is a view showing a sectional structure in the vicinity of the U-shaped bent portion of the paper guide body. Similar to the above-described embodiment, this embodiment has a configuration in which toner and dust on the surface of the rib can be removed without moving the rib. Therefore, here, an example in which the rib is fixed to the paper guide main body is shown. However, also in this configuration, the ribs may be movable similarly to the embodiment shown in FIGS.

In this embodiment, the surface of the rib 20 is cleaned by the roller brush roller 12. As the cleaning material, flade, fur, or the like can be used in addition to the brush material. The brush roller 12 is rotatably supported by one end of the connecting rod 13. Connecting rod 1
The other end of 3 is rotatably supported at a position substantially at the center of the U-shaped bent portion of the paper guide body 1. Rotational force is transmitted to the connecting rod 13 by the gear 15. Rotational force is transmitted to the brush roller 12 by the gear 15 and the gear 14. The gears 14 and 15 are provided on the back side of the device including the paper guide device.

Explaining the cleaning operation, when the rotational force is transmitted from the drive system (not shown) to the gears 14 and 15, the connecting rod 13 and the brush roller 12 rotate as shown by the arrow in FIG. 11 (B). The rotation of the connecting rod 13 causes the entire brush roller 12 to rotate, and the brush roller 12 comes into contact with the surface of the rib 20 while moving along the paper transport path. As can be seen from this, the length of the connecting rod 13 and the diameter of the brush roller 12 are such that the
The size is such that it touches. Brush roller 12
Rotates in the direction shown by the arrow in the figure when it comes into contact with the surface of the rib 20. By this rotation, toner and dust on the surface of the rib 20 are scraped off, and the surface of the rib 20 is made clean.

The cleaning operation of this embodiment is also executed when the paper is not passing through the paper guide main body 1 portion, as in the embodiment shown in FIG. This is because the brush roller 12 passes through the sheet conveyance path. In addition,
The inner paper guide 5 is opened at the passage portion of the brush roller 12 as shown in the drawing.

[0048]

According to the invention described in claim 1, by moving the ribs by the rib moving means, the toner on the surface of the ribs is spilled off due to the impact at the time of the movement so that the toner and dust adhered to the surface of the ribs are spilled. It is possible to remove dust and the like. As a result, it is possible to prevent the toner and dust on the rib surface from adhering to the sheet to be conveyed later and soiling the sheet. Therefore, this paper guide device
Even in the case of preparing for H, it is possible to prevent the toner from adhering to the original, and it is possible to prevent the occurrence of a stain on the copy image.

According to the second aspect of the invention, even when the toner image surface of the sheet on which the toner image is formed is conveyed with the rib side, the toner peeling hardly occurs and the toner adheres to the rib. Can be prevented. Further, since the toner is less likely to be peeled off from the paper, damage to the paper to be conveyed can be reduced. Further, the toner, dust, and the like attached to the ribs are dropped by the impact of the movement of the ribs, so that the ribs can be kept in a clean state. Moreover, the movement of the ribs is continuously performed during the conveyance of one sheet, so that the ribs can always be kept clean.
For this reason, it is possible to prevent toner and dust from adhering to the sheet conveyed later. By applying this configuration to the RDH, it is possible to prevent the toner from peeling off the original document, and to prevent the original document from being damaged even when the original document is repeatedly circulated.

According to the third aspect of the present invention, not only spillage due to vibration during rib movement, but also the rib surface can be cleaned with a cleaning material, so that toner and dust on the rib surface can be removed more reliably, and the rib surface can be removed more reliably. The surface can be cleaned. As a result, it is possible to prevent toner, dust, and the like from adhering to the sheet conveyed later.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment according to claims 1 and 2, and shows a sectional configuration of a paper guide device.

FIG. 2 is a cross-sectional view of plane a of FIG. 1 in the vertical direction in the figure.

FIG. 3 is a perspective view showing an outer appearance of the vicinity of a rib of the paper guide device.

FIG. 4 is a diagram showing an example in which a solenoid is used as an actuator for moving a rib.

FIG. 5 is a diagram showing an example in which an electromagnet is used as an actuator for moving a rib.

FIG. 6 is a diagram showing an example in which an eccentric cam is used as an actuator for moving a rib.

FIG. 7 is a flowchart showing a processing procedure of the paper guide device.

FIG. 8 is a diagram showing an embodiment according to claim 3, showing a cross-sectional configuration near the tips of the ribs.

FIG. 9 is a diagram showing another embodiment according to claim 3, showing a cross-sectional configuration near the tips of the ribs.

FIG. 10 is a view showing another embodiment, showing a cross-sectional structure of a rib portion.

FIG. 11 is a view showing still another embodiment, showing a configuration near a bent portion of the paper guide body.

[Explanation of symbols]

 1 Paper guide body 2 Rib 3 Actuator 6 Paper sensor 7 Paper

Claims (3)

[Claims] 1. A paper guide body, which is composed of a plate-like member bent in a U shape, along which the paper is conveyed,
A groove-shaped rib loose insertion portion formed along at least the U-shaped bent portion of the paper guide body along the sheet transport direction, and a rib loose insertion portion of the bent portion on the outer peripheral surface side of the paper guide. And a rib provided so as to face each other, and the rib is moved between a position projecting to the inner peripheral surface of the paper guide body and a position retracting to the outer peripheral surface of the paper guide body. A paper guide device comprising a rib moving means. 2. The paper guide apparatus according to claim 1, further comprising means for intermittently operating the rib moving means during conveyance of one sheet of paper. 3. The paper guide device according to claim 1, wherein a cleaning material for cleaning the rib surface is provided on the outer peripheral surface of the paper guide body along the groove-shaped rib loose insertion portion. A paper guide device characterized in that