JPH09284476A - Reader - Google Patents

Abstract

(57) An object of the present invention is to provide a reading device capable of reducing the adherence of dust to the outer peripheral surface of the roller of a contact image sensor and the adherence of dust to the platen glass. SOLUTION: The present invention is characterized by including static electricity prevention means for preventing generation of static electricity in a range where at least rollers provided on the contact image sensor on the lower surface of the platen glass can contact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reading device which is applied to a facsimile device, a scanner device, a copying machine or the like and which reads image information of an original on a platen glass by a contact image sensor, and more particularly to a contact image. The present invention relates to a reading device having a structure in which a distance between a sensor and a platen glass is kept constant by a roller.

[0002]

2. Description of the Related Art Conventionally, a reading apparatus configured to read image information of a document by a contact type image sensor that moves along the lower surface of the document table glass while the document is placed on the upper surface of the document table glass has a reduction optical system. Although it is more compact and thinner than the configuration used, it has a small margin for the shift of the focal length because of its shallow depth of focus. Therefore, there is a drawback in that the focus is not on the original and the image is easily blurred due to variations in the original position, variations in the thickness of the original glass, and the like.

In order to make up for the drawback, a roller is attached to the contact image sensor, and the contact image sensor and the platen glass are moved by pressing the contact image sensor against the platen glass through the roller. There is implemented a reading device that can keep the distance between and at a constant distance corresponding to the roller.

[0004]

However, in the above-mentioned conventional reading device, when the roller moves in contact with the platen glass in accordance with the movement of the contact type image sensor,
Due to the influence of static electricity or the like caused by friction between the roller and the platen glass, dust or the like is likely to adhere to the outer peripheral surface of the roller.

Dust attached to the outer peripheral surface of the roller causes rotation of the roller to cause unevenness in the movement amount of the contact image sensor, and dust attached to the outer peripheral surface of the roller has a substantial radius. In order to partially enlarge the image, the focus position is displaced from the document surface (the document table glass upper surface) according to the movement of the contact image sensor, which causes an abnormal image.

In addition, dust attached to the area on the lower surface of the platen glass that can come into contact with the rollers, like the dust attached to the outer peripheral surface of the rollers, obstructs the rotation of the rollers and causes unevenness in the movement amount of the contact image sensor. In order to increase the radius of the roller and to partially increase the substantial radius of the roller, the surface of the document at the focus position (upper surface of the platen glass) according to the movement of the contact image sensor.
Deviation from each other and causes an abnormal image.

The present invention has been made in view of the above circumstances, and provides a reading device capable of reducing the adhesion of dust to the outer peripheral surface of the roller of the contact image sensor and the dust on the platen glass. The purpose is to do.

[0008]

In order to achieve the above object, a reading apparatus according to a first aspect of the present invention reads image information of a document while moving the document along a lower surface of a platen glass on which the document is placed. In the reading device including a contact type image sensor for reading, a roller provided in the contact type image sensor, and a pressing unit for pressing the contact type image sensor to the lower surface of the platen glass through the roller, the original document It is characterized in that it is provided with static electricity prevention means for preventing generation of static electricity at least in the range where the rollers can contact on the lower surface of the base glass.

According to a second aspect of the present invention, there is provided the reading device according to the first aspect, wherein the static electricity preventing means moves the contact-type image sensor to a range on the lower surface of the original platen glass where at least the rollers can contact. Accordingly, the static elimination member is provided in the contact type image sensor so as to be brought into contact therewith.

According to a third aspect of the present invention, there is provided a reading device including a contact type image sensor which is mounted on a traveling body which moves along a lower surface of an original table glass on which an original is placed and which reads image information of the original. In a reading device including a roller provided in a contact image sensor and a pressing unit that presses the contact image sensor against the lower surface of the platen glass through the roller with the traveling body as a reference, The static elimination member is provided on the traveling body so as to be in contact with at least a range where the rollers can come into contact with the lower surface of the platen glass according to movement.

According to a fourth aspect of the present invention, there is provided a contact type image sensor for reading image information of a document while the document moves along a lower surface of a platen glass placed on an upper surface, and the contact type image sensor. In a reading device provided with a roller provided, and a pressing means for pressing the contact image sensor to the lower surface of the platen glass through the roller,
It is characterized in that it comprises roller cleaning means for contacting at least an outer peripheral surface of the roller which comes into contact with the platen glass.

According to a fifth aspect of the present invention, there is provided a contact type image sensor for reading image information of a document while the document moves along a lower surface of a platen glass placed on an upper surface thereof, and the contact type image sensor. In a reading device provided with a roller provided, and a pressing means for pressing the contact image sensor to the lower surface of the platen glass through the roller,
According to the movement of the contact-type image sensor, the platen cleaning means provided in the contact-type image sensor is arranged so as to be in contact with at least the area where the rollers can contact on the lower surface of the platen. .

According to a sixth aspect of the present invention, there is provided a contact type image sensor for reading image information of a document while the document moves along a lower surface of a platen glass placed on an upper surface thereof. In a reading device provided with a roller provided, and a pressing means for pressing the contact image sensor to the lower surface of the platen glass through the roller,
A roller cleaning means that contacts at least an outer peripheral surface of the roller that contacts the platen glass, and an arrangement that contacts at least the range of the roller on the lower surface of the platen glass according to the movement of the contact image sensor. A document table cleaning means provided in the contact image sensor is provided.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described in detail.

FIG. 1 is a side sectional view of a main part of a reading device using a contact image sensor to which the present invention is applied.
In the figure, 1 is a platen glass on which a document is placed on the upper surface, 2 is a contact image sensor, 3 is a pair of rotatably provided brackets 4 on both sides of the contact image sensor 5, Is a running body on which the contact image sensor 2 is mounted, 6 is a shaft that is erected on both sides in the running body 5 and around which a push-up spring 7 is wound, and 8 is on the side of the bracket 4 of the contact image sensor 2. An extending portion which is provided so as to extend and which has a through hole 8a into which the shaft 6 is inserted and which receives the upward pushing force by the pushing spring 7, and 9 is a casing for supporting the original glass 1 and various components. It is the body.

Further, 10 is a guide shaft fixed to the housing 9 side and inserted into a guide hole 11 provided at the bottom of the traveling body 5,
Reference numeral 12 denotes a projecting arm provided on one of both ends of the traveling body 5 that is farther from the guide hole 11, and 13 denotes a rail body that slidably receives the projecting arm 12 and is fixed to the housing 9 side. .

The contact type image sensor 2 having the above structure
Is urged so as to be pressed against the lower surface of the platen glass 1 through the opening 3 by the upward pressing force of the pressing spring 7, and the roller 3 is separated from the lower surface of the platen glass 1 by the amount of the roller 3. The focal point is always in contact with the surface of the original placed on the upper surface of the original platen glass 1 to be read by keeping in contact with each other while maintaining the distance.

When reading image information of a document placed on the upper surface of the document table glass 1, a driving source (not shown) is operated to move the traveling body 5 while being guided by the guide shaft 10 and the rail body 13. In accordance with the movement, the contact image sensor 2 mounted on the traveling body 5 has the original platen glass 1
The contact type image sensor 2 reads the image information of the entire surface of the document by repeating the optical reading of the image information for each line while moving.

When the contact-type image sensor 2 moves along the lower surface of the platen glass 1, the edge 3 rolls while being in contact with the lower surface of the platen glass 1. The distance between the sensor 2 and the upper surface of the platen glass 1 is always kept constant even if the contact image sensor 2 moves. Therefore, the focal position of the contact-type image sensor 2 can be maintained on the upper surface of the original platen glass 1, that is, the original surface to be read at all times during the movement, and the excellent original can be read.

Here, the distance between the contact image sensor 2 and the lower surface of the original platen glass 1 is the distance of the roller 3. This distance is constant regardless of the moving position of the contact image sensor 2 as long as the roller 3 having a circular outer periphery rolls on the lower surface of the original platen glass 1 having a flat surface.

However, when the rollers 3 roll while contacting the lower surface of the platen glass 1, static electricity is generated on the platen glass 1, and the static electricity causes dust to adhere to the platen glass 1. Further, the dust is also attached to the outer peripheral surface of the roller 3 by rolling while contacting the original platen glass 1 to which the dust is attached.

The dust attached to the outer peripheral surface of the roller 3 is
Fine irregularities are generated on the outer peripheral surface of the circular plate, and dust attached to the lower surface of the original platen glass 1 causes minute irregularities on the lower surface of the original platen glass 1, which is the flat surface. These minute irregularities change according to the moving position of the contact image sensor 2, and change the distance between the contact image sensor 2 and the lower surface of the document glass 1 according to the moving position of the contact image sensor 2. It will be.

The variation in the distance between the contact image sensor 2 and the lower surface of the original platen glass 1 depends on the contact image sensor 2.
The focus position of the document changes from the surface of the document (the upper surface of the document glass 1), and stable document image information cannot be obtained.

Therefore, if the static electricity that causes the adhesion of dust is removed in the range where it can contact the outer peripheral surface of the roller 3 and at least the roller 3 on the lower surface of the document table glass 1, at least the reading of the document image information is adversely affected. It is possible to prevent the attachment of dust that can be exerted.

Below, the static electricity that causes the adhesion of dust is
The first and second embodiments of the configuration in which the outer peripheral surface of the roller 3 and the lower surface of the original platen glass 1 are removed at least in a range where they can contact each other will be described with reference to FIGS. 2 and 3.

FIG. 2 is a front sectional view of a main part of the reading device according to the first and second embodiments, and FIG. 3 is a perspective view of the main part of the reading device of FIG. 1, the same parts as those of the reading device shown in FIG.

In the drawings, first, in the first embodiment, the contact-type image sensor 2 is provided with a static elimination cloth 14 which is known per se as a member for removing static electricity of a contact. The neutralization cloth 14 is attached to the lower surface of the platen glass 1 at least in a range where the roller 3 can come into contact with the contact type image sensor 2 in accordance with the movement of the static electricity cloth 14.
Are arranged so as to come into contact with each other according to the movement of the contact image sensor 2.

Specifically, the static elimination cloth 14 has contact areas between the roller 3 and the lower surface of the original platen glass 1 on both sides of the contact type image sensor 2 in the moving direction (the moving direction of the contact type image sensor is the longitudinal direction). And is provided in an arrangement including the width of a rectangle having a width corresponding to the thickness of the roller 3.

As a result, each time the contact-type image sensor 2 moves in order to read document image information, the static elimination cloth 14 that moves integrally with the contact-type image sensor 2 is at least the roller on the lower surface of the platen glass 1. The static electricity generated in the range that can contact 3 is removed. Therefore, dust that is attracted mainly by static electricity and adheres to the platen glass 1 does not adhere to at least the area on the lower surface of the platen glass 1 that can come into contact with the rollers 3.
No dust is transferred to the contact type image sensor 2 and the distance between the contact type image sensor 2 and the lower surface of the platen glass 1 can be kept constant irrespective of the movement of the contact type image sensor 2, thus ensuring stable reading of document image information. it can.

In FIGS. 2 and 3, in the second embodiment, the static elimination cloth 15 is provided on the traveling body 5 on which the contact image sensor 2 is mounted. The neutralization cloth 15 is attached to the lower surface of the platen glass 1 at least in a range where the roller 3 can come into contact with the traveling body 5 in accordance with the movement of the traveling body 5.
Are in contact with each other according to the movement of the traveling body 5.

Specifically, the static elimination cloth 15 has contact areas between the rollers 3 and the lower surface of the platen glass 1 on both side surfaces in the moving direction of the traveling body 5 (the moving direction of the contact type image sensor is the length direction, It is provided in an arrangement including a width of a rectangle having a width corresponding to the thickness of the roller 3.

As a result, every time the traveling member 5 moves to read the document image information, the static elimination cloth 15 that moves integrally with the traveling member 5 comes into contact with at least the roller 3 on the lower surface of the original platen glass 1. Remove the static electricity generated in the obtained range.
Therefore, the dust that is attracted mainly by static electricity and adheres to the platen glass 1 does not adhere to at least the area on the lower surface of the platen glass 1 that can come into contact with the rollers 3, so that the dust moves from the platen glass 1 to the rollers 3. Of course, the distance between the contact image sensor 2 and the lower surface of the document glass 1 can always be kept constant irrespective of the movement of the contact image sensor 2, and stable reading of document image information can be performed.

2 and 3, the static elimination cloth 14 is provided on the contact image sensor 2 in the first embodiment,
The second embodiment of the configuration in which the static elimination cloth 15 is provided on the traveling body 5 is shown at the same time, but only one of the configurations exhibits the above-described respective operational effects. However, if the first embodiment and the second embodiment are carried out at the same time, the static electricity can be surely removed.

In the first and second embodiments described above, the static electricity that causes the adhesion of dust is removed in the range where the outer peripheral surface of the roller 3 and at least the roller 3 on the lower surface of the original platen glass 1 can contact. However, with the outer peripheral surface of the roller 3,
Also, by cleaning and removing dust adhering to at least the area that can come into contact with the rollers 3 on the lower surface of the platen glass 1,
It is possible to prevent the attachment of dust that may adversely affect the reading of the original image information.

Hereinafter, the outer peripheral surface of the roller 3 and the platen glass 1 will be described.
Third and fourth embodiments will be described in which the dust attached to at least the area of the lower surface that can come into contact with the rollers 3 is removed by cleaning.

First, FIGS. 4 and 5 for the third embodiment.
This will be described with reference to FIG. 4 is a front sectional view of a main part of the reading device according to the third embodiment, and FIG. 5 is a perspective view of the main part of the reading device of FIG. 4, and in those views, shown in FIG. The same parts as those of the reading device are designated by the same reference numerals and the description thereof will be omitted.

In these drawings, the leaf spring 16 is provided with cleaning cloths 17 at both ends thereof. The shaft 6 is inserted into the through hole 16a formed in the central portion of the leaf spring 16 together with the through hole 8a formed in the extending portion 8 provided so as to extend laterally of the bracket 4. Also, the leaf spring 1
The cleaning cloths 17 provided at both ends of the contact point 6 are in contact with the outer peripheral surfaces of the pair of rollers 3 by the restoring force of the leaf spring 16 generated by being bent by a part of the restoring force of the push-up spring 7. It should be noted that the leaf spring 16 rotates about the axis only by inserting the shaft 6 into the through hole 16a, but since the side surface of the leaf spring 16 and the bracket 4 are close to each other, the leaf spring 16 The rotation of is controlled by the bracket 4, and the contact of the cleaning cloth 17 with the outer peripheral surface of the roller 3 is maintained.

As a result, each time the contact-type image sensor 2 moves to read the document image information, the roller 3 rotates as it moves, and the outer peripheral surface of the roller 3 and the cleaning cloth 17 are rotated.
The dust that adheres to the roller 3 and adheres to the roller 3 is scraped off and removed by the cleaning cloth 17. Further, dust is also removed by the abrasion of the cleaning cloth 17. In addition, dust attached to a region on the lower surface of the original platen glass 1 that can come into contact with the rollers 3 is also indirectly removed from the cleaning cloth 17 after being transferred to the rollers 3. Therefore, the distance between the contact image sensor 2 and the lower surface of the platen glass 1 can always be kept constant irrespective of the movement of the contact image sensor 2, and stable reading of document image information can be performed.

Next, FIG. 6 and FIG. 7 for the fourth embodiment.
This will be described with reference to FIG. 6 is a front sectional view of a main part of the reading device according to the fourth embodiment, and FIG. 7 is a perspective view of the main part of the reading device of FIG. 6, and in those views, shown in FIG. The same parts as those of the reading device are designated by the same reference numerals and the description thereof will be omitted.

In these drawings, the leaf spring 18 is provided with cleaning cloths 19 at both ends thereof. The shaft 6 is inserted into the through hole 18a formed in the central portion of the leaf spring 18 together with the through hole 8a formed in the extending portion 8 provided so as to extend laterally of the bracket 4. Also, the leaf spring 1
The cleaning cloths 18 provided on both ends of the sheet 8 are in contact with the lower surface of the original platen glass 1 by the restoring force of the leaf springs 18 generated by being bent by a part of the restoring force of the push-up spring 7. The contact position includes a width of a contact range between the roller 3 and the lower surface of the platen glass 1 (a rectangular shape having a moving direction of the contact image sensor as a length direction and having a width corresponding to the thickness of the roller 3). It is said that. The leaf spring 18 rotates about the shaft simply by inserting the shaft 6 into the through hole 18a. However, since the side surface of the leaf spring 18 and the bracket 4 are close to each other, the leaf spring 18 Is restricted by the bracket 4, and the contact of the cleaning cloth 19 with the contact position is maintained.

As a result, every time the contact-type image sensor 2 moves to read the document image information, the cleaning cloth 19 rubs against the lower surface of the platen glass 1 at least in a range where it can come into contact with the rollers. The dust adhering to the area where the rollers can contact is scraped off by the cleaning cloth 19 and removed. In addition, dust is also removed by abrasion of the cleaning cloth 19. In addition, dust attached to the rollers 3 is also indirectly removed from the cleaning cloth 19 after being moved to a range on the lower surface of the original platen glass 1 that can contact the rollers 3. Therefore, the distance between the contact image sensor 2 and the lower surface of the platen glass 1 can always be kept constant irrespective of the movement of the contact image sensor 2, and stable reading of document image information can be performed.

In the third embodiment, the dust adhering to the outer peripheral surface of the roller 3 is directly removed by the cleaning cloth 17, and the dust adhering to the platen glass 1 is indirectly removed by the cleaning cloth 17. On the contrary, in the fourth embodiment, the dust adhered to the outer peripheral surface of the roller 3 is indirectly removed by the cleaning cloth 19, and the dust adhered to the platen glass 1 is directly removed by the cleaning cloth 19. Although the configuration is used, the configurations of the third and fourth embodiments can be combined.

That is, the leaf spring 18 and the leaf spring 16 are overlapped with each other and the shaft 6 is inserted into the through holes 18a and 16a respectively formed therein and the through hole 8a formed in the extending portion 8. Thus, the cleaning cloth 17 can directly remove the dust attached to the outer peripheral surface of the roller 3, and the cleaning cloth 19 can directly remove the dust attached to the platen glass 1.

As a result, dust adhering to the outer peripheral surface of the roller 3 and dust adhering to the platen glass 1 are immediately removed, which is even more reliable than the independent structure of the third or fourth embodiment alone. In addition, the distance between the contact image sensor 2 and the lower surface of the platen glass 1 can always be kept constant irrespective of the movement of the contact image sensor 2, and stable reading of document image information can be performed.

[0045]

According to the first aspect of the present invention, since the static electricity preventing means for preventing the generation of static electricity at least in the range where the rollers on the lower surface of the original table glass can come into contact is provided, the original table glass is attracted by the static electricity to the original table glass. The adhered dust does not adhere to at least the area on the lower surface of the platen glass that can come into contact with the rollers 3, the dust does not move from the platen glass to the rollers, and the contact type image sensor always moves the contact type image. The distance between the sensor and the lower surface of the platen glass can be kept constant, and stable reading of original image information can be performed.

According to a second aspect of the present invention, in the configuration of the first aspect of the invention, the static electricity preventing means is provided on the lower surface of the platen glass of the contact type image sensor at least within a range in which the rollers can contact. Since the static elimination member is provided in the contact-type image sensor so as to come into contact with the contact-type image sensor as it moves, it moves integrally with the contact-type image sensor each time the contact-type image sensor moves to read document image information. The charge removing member removes static electricity generated in at least a range of the lower surface of the original platen glass 1 that can contact the rollers. Therefore, the dust that is attracted by the static electricity and adheres to the platen glass 1 does not adhere to at least the area on the lower surface of the platen glass that can come into contact with the rollers. Even if the image sensor moves, the distance between the contact image sensor and the lower surface of the platen glass can always be kept constant, and stable reading of the original image information can be performed.

According to the third aspect of the present invention, the static elimination member is provided on the traveling body so as to be in contact with at least a range on the lower surface of the platen glass which can contact with the traveling body according to the movement of the traveling body. Every time the traveling body moves to read the document image information, the static elimination member that moves integrally with the traveling body removes static electricity generated in at least a range where it can come into contact with the rollers on the lower surface of the document table glass. . Therefore, dust that is attracted by static electricity and adheres to the platen glass does not adhere to at least the area on the lower surface of the platen glass that can come into contact with the rollers. Even if the sensor moves, the distance between the contact image sensor and the lower surface of the original platen glass can always be kept constant, and stable reading of original image information can be performed.

According to the invention of claim 4, since the roller cleaning means for contacting at least the outer peripheral surface of the roller contacting the document table glass is provided, the contact-type image sensor moves for reading document image information. The outer peripheral surface of the roller and the roller cleaning means rub each other,
Dust adhering to the rollers is scraped off and removed by the roller cleaning means. In addition, dust attached to a region of the lower surface of the original platen glass that can come into contact with the rollers is also indirectly removed by the roller cleaning unit after being transferred to the rollers 3.
Therefore, even if the contact-type image sensor moves, the distance between the contact-type image sensor and the lower surface of the platen glass can always be kept constant, and stable reading of document image information can be performed.

According to the fifth aspect of the present invention, the contact type image sensor is arranged in such a manner that it is brought into contact with at least the area on the lower surface of the platen glass where the rollers can contact in accordance with the movement of the contact type image sensor. Since the contact plate type image sensor is provided with a platen cleaning unit, the platen plate cleaning unit and a range that can contact at least the roller on the lower surface of the platen glass are moved as the contact type image sensor moves for reading document image information. Are rubbed against each other and dust adhering to a range where the rollers can come into contact with each other is scraped off and removed by the platen cleaning means. Further, dust attached to the rollers is also indirectly removed by the platen cleaning means after being moved to a range on the lower surface of the platen glass which can contact the rollers. Therefore, even if the contact-type image sensor moves, the distance between the contact-type image sensor and the lower surface of the original platen glass can be kept constant, and stable reading of the original image information can be performed.

According to the sixth aspect of the present invention, the roller cleaning means contacting at least the outer peripheral surface of the roller contacting the original platen glass, and the lower surface of the original platen glass according to the movement of the contact type image sensor. Since at least the platen cleaning means provided in the contact type image sensor is arranged so as to be in contact with the range where the rollers can contact, dust attached to the outer peripheral surface of the rollers and dust attached to the platen glass are , Which are immediately removed directly by the roller cleaning means and the platen cleaning means, respectively, and are more surely moved even if the contact-type image sensor is moved, as compared with the configuration of the invention according to claim 4 or 5. The distance between the contact-type image sensor and the lower surface of the original platen glass can be kept constant, and stable reading of original image information can be performed.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a configuration of a main part of a reading device to which the present invention is applied.

FIG. 2 is a front cross-sectional view of the main parts of the reading device according to the first and second embodiments of the present invention.

FIG. 3 is a perspective view of a main part of the reading device according to the first and second embodiments of the present invention.

FIG. 4 is a front sectional view of a main part of a reading device according to a third embodiment of the invention.

FIG. 5 is a perspective view of a main part of a reading device according to a third embodiment of the invention.

FIG. 6 is a front sectional view of a main part of a reading device according to a fourth embodiment of the invention.

FIG. 7 is a perspective view of a main part of a reading device according to a fourth embodiment of the invention.

[Explanation of symbols]

 1 Document Platen Glass 2 Contact Image Sensor 3 Roller 4 Bracket 5 Traveling Body 6 Axis 7 Push-up Spring 8 Extending Parts 8a, 16a, 18a Through Hole 9 Case 10 Guide Axis 11 Guide Hole 12 Protruding Arm 13 Rails 14, 15 Static erasing cloth 16,18 Leaf spring 17,19 Cleaning cloth

Claims (6)

[Claims] 1. A contact type image sensor for reading image information of the document while moving along a lower surface of a document table glass on which the document is placed, a roller provided on the contact type image sensor, and In a reading device provided with a pressing unit that presses the contact image sensor against the lower surface of the platen glass through the rollers, static electricity for preventing generation of static electricity at least in a range where the rollers on the lower surface of the original table glass can contact. A reading device comprising a prevention means. 2. The static eliminator provided on the contact type image sensor in such a manner that the static electricity preventing means is in contact with at least the area on the lower surface of the document table glass where the roller can contact in accordance with the movement of the contact type image sensor. The reading device according to claim 1, wherein the reading device is a member. 3. A contact type image sensor mounted on a traveling body that moves along a lower surface of a document table glass on which an original is placed, and a contact type image sensor for reading image information of the document, and the contact type image sensor. And a pressing unit that presses the contact image sensor against the lower surface of the platen glass through the roller with the traveling image sensor as a reference, the original document table according to the movement of the traveling object. A reading device comprising a static elimination member provided on the traveling body in an arrangement in which at least the area on the lower surface of the glass where the rollers can come into contact is arranged. 4. A contact type image sensor for reading image information of the document while moving the document along a lower surface of a platen glass placed on the upper surface, a roller provided in the contact type image sensor, and In a reading device including a pressing unit that presses the contact image sensor against the lower surface of the platen glass through the roller, a roller cleaning unit that contacts at least an outer peripheral surface of the roller that contacts the platen glass is provided. A reading device characterized by the above. 5. A contact type image sensor for reading image information of the document while the document moves along a lower surface of a platen glass placed on the upper surface, a roller provided in the contact type image sensor, and In a reading device including a pressing unit that presses the contact image sensor against the lower surface of the platen glass through the roller, at least the roller on the lower surface of the platen glass comes into contact with the lower surface of the original plate glass according to movement of the contact image sensor. A reading device comprising a document table cleaning means provided in the contact image sensor so as to be in contact with a range to be obtained. 6. A contact image sensor for reading image information of the document while moving along the lower surface of a document table glass on which the document is placed, a roller provided on the contact image sensor, and In a reading device including a pressing unit that presses the contact image sensor against the lower surface of the original platen glass through the roller, a roller cleaning unit that abuts at least an outer peripheral surface of the roller that contacts the original platen glass, And a platen cleaning means provided on the contact type image sensor in an arrangement in which at least the area on the lower surface of the platen glass which can be contacted is moved according to the movement of the contact type image sensor. Reader.