JP7075615B2 - Reader and image forming device - Google Patents

Description

The present invention relates to a reading device and an image forming device.

Conventionally, a reading device including an image sensor that moves between a first position and a second position different from each other provided with glass and performs a reading operation at either of the two positions is known.

For example, Patent Document 1 describes a first glass for scanning, a second glass for scanning, a second glass for fixed reading, and a first position, which is a first position. A reading device including an image sensor that moves between the lower part of the glass and the lower part of the second glass, which is a second position, and performs a reading operation at either position is described. This reading device stops below the first glass or moves below the second glass to read the original. The image sensor is provided with the following spacers. The image is in a state where it is urged by an urging means together with the image sensor to come into contact with the first glass and the second glass, and a gap is formed between the image sensor and the first glass and the second glass. It is a spacer that can move on the lower surfaces of the first glass and the second glass together with the sensor.

However, in the conventional configuration, there remains a problem that it is difficult to adjust the position (focus adjustment) of the image sensor in the optical axis direction in order to deal with the variation in parts at the first position and the second position.

In order to solve the above-mentioned problems, the present invention has a reading device provided with an image sensor that moves between different first and second positions provided with glass and selectively performs reading operations at both positions. In the image sensor, a contact portion that abuts on the glass at the first position is provided, and a positioning portion different from the contact portion for positioning the glass at the second position is provided. A positioning member with which the positioning portion abuts is provided at the second position, and at the first position, the image sensor reads while moving along a straight line, and the movement between the first position and the second position is performed. The straight line is a movement in an angled direction, and is a first contact state in which the contact portion and the glass are in contact with each other while moving between the first position and the second position. The second contact state in which the positioning portion and the positioning member abut is switched, and this switching occurs during movement along the straight line .

According to the present invention, it is possible to obtain an excellent effect that the position adjustment in the optical axis direction of the image sensor for dealing with the variation in parts at the first position and the second position becomes relatively easy.

It is a perspective view which shows the copying machine which concerns on Embodiment 1. FIG. It is explanatory drawing which shows the structure of the reading apparatus in the same copying machine. Explanatory drawing of the reading apparatus which concerns on the prior art. Explanatory drawing of the main part of the reading apparatus in the copier. An exploded perspective view of the main part. Explanatory drawing of the reading apparatus which concerns on a modification.

[Embodiment 1]
An embodiment of the present invention (hereinafter, the present embodiment is referred to as “Embodiment 1”) will be described.
FIG. 1 is a perspective view showing a copying machine 1 which is an image forming apparatus according to the first embodiment.
The copying machine 1 of the present embodiment 1 is mainly composed of an image forming unit 3, an image reading unit 4, and an automatic document transporting device (hereinafter, also simply referred to as “ADF”) 5. The reading device 6 of the first embodiment mainly includes an image reading unit 4 and an ADF 5.

The image forming unit 3 of the first embodiment is, for example, an exposure unit as a latent image forming means, a photoconductor drum as a plurality of latent image carriers, cyan (C), magenta (M), and yellow (Y). This is an electrophotographic image forming apparatus including a developing device using four colors of black (K) toner, an intermediate transfer section, a secondary transfer section, a fixing section, and the like. It may be an image forming apparatus of another method such as an inkjet method.

Based on the image data obtained by reading the image of the reading device 6 and the image data transmitted from an external device such as a personal computer, the image forming unit 3 exposes the photoconductor drums of each color by, for example, an exposure unit to expose each photoconductor. An electrostatic latent image is formed on the drum, and toner is supplied to the latent image on each photoconductor drum for development by a developing device of each color. Further, the image forming unit 3 primary transfers the toner images on the photoconductor drum of each color so as to overlap each other on the intermediate transfer belt of the intermediate transfer unit, and then secondary to the recording paper which is the recording material in the secondary transfer unit. The toner image on the recording paper is heated and pressurized at the fixing portion to be fixed, and a color image is formed.

FIG. 2 is an explanatory diagram showing the configuration of the reading device 6 of the first embodiment.
The scanning device 6 has a conveyed document scanning mode (hereinafter referred to as DF scanner mode) for reading an image of a document (original) being transported, and a loading mode for reading an image of the document surface of a document placed on a flat contact glass. It is configured to be selectively operable in the placed document scanning mode (hereinafter referred to as flatbed scanner mode).

In the flatbed scanner mode, the image reading unit 4 irradiates the original surface (reading surface) of the original (original sheet, thick paper, book, etc.) on the flatbed contact glass 41 with light and reflects the original surface. The original image is read by converting the light into an image signal.

Further, in the DF scanner mode, the ADF 5 separates the original sheets one by one from the original sheet bundle loaded on the original tray 51, which is a set unit, and carries them into the original transfer passage, and along the original transfer passage. Transport. The document transport passage is composed of a pickup roller 52a, a separation roller 52b, a pull-up roller pair 52c, a reading inlet roller pair 52d, a reading outlet roller pair 52e, a paper ejection roller pair 52f, and the like. Then, during the transfer, the document surface of the document sheet (the document surface when the upper surface on the document tray 51 is a single-sided document) is partially in DF contact in the image reading unit 4 from the upstream portion in the transport direction. Facing the glasses 42A and 42B. The reading device 6 sequentially reads the images on the facing document sheets on the DF contact glasses 42A and 42B of the image reading unit 4. The scanned document sheet S is ejected to the paper output tray 53 by the transport roller pairs 52e and 52f.

The ADF5 is attached to the rear portion (rear surface side portion) of the apparatus main body 1M via an opening / closing mechanism such as a hinge. The ADF 5 can take an open position in which the flatbed contact glass 41 is opened with respect to the apparatus main body 1M and a closed position in which the document can be pressed against the flatbed contact glass 41.

Further, the ADF 5 is covered with a cover 55 that can be opened and closed at least above the ADF 5. The cover 55 forms a paper feed port 55a above the vicinity of the end of the document tray 51 on the paper feed side so that the tip of the document sheet S enters the cover. Further, the cover 55 covers the upper part of the tip portion of the document tray 51 so that the tip portion of the document tray 51 is housed inside the paper feed port 55a. Further, the ADF 5 has a main guide portion forming a document transport passage 52 from the paper feed port 55a to the discharge port 56 formed by ribs or the like formed on the cover 55 or the like.

The flatbed contact glass 41 faces the lower surface (reading surface) of the original sheet when the reading device 6 operates as a flatbed scanner and the original sheet is placed on the flatbed contact glass 41. Further, when the reading device 6 operates as a DF scanner, the first DF contact glass 42A faces the lower surface (reading surface) of the document sheet passing through the predetermined reading position of the document transport passage 52. ing. Further, the first DF contact glass 42A is inclined so as to form a preset inclination angle with respect to the flatbed contact glass 41. Further, when the reading device 6 operates as a DF scanner, the second DF contact glass 42B faces the upper surface (reading surface) of the document sheet passing through the predetermined reading position of the document transport passage 52. ing.

Inside the image reading unit 4, a first reading unit 45 as a reading means and a guide rod 46 extending in the left-right direction in FIG. 2 are provided. The first reading unit 45 includes a plurality of compressions incorporated in a compressed state between the integrated optical scanning unit 47, the bracket 48 holding the integrated optical scanning unit 47, and the integrated optical scanning unit 47 and the bracket 48. It is composed of a coil spring 49 (elastic member).

The integrated optical scanning unit 47 is configured as a close contact image sensor in which, for example, a mold frame holds an equal-magnification imaging element, a roof mirror lens array, an optical path separation mirror, a first-magnification image sensor, an illumination light source, and the like (adhesion). 1x optical system). The integrated optical scanning unit 47 is configured to have a large depth of focus capable of line scanning an image with high resolution in the main scanning direction and capable of reading an image such as a book document. The integrated optical scanning unit 47 is not limited to a specific method as long as it has a configuration compatible with a DF scanner and a flatbed scanner. The main scanning direction is a direction parallel to both the upper surface of the flatbed contact glass 41 and the upper surface of the first DF contact glass 42A (the direction perpendicular to the paper surface in FIG. 2).

The integrated optical scanning unit 47 is also movably guided in the sub-scanning direction by a guide rod 46 arranged below the bracket 48. Then, depending on the position in the sub-scanning direction, the integrated optical scanning unit 47 slidably abuts on the flatbed contact glass 41 at the upper portion thereof. As a result, the first reading unit 45 can move along the guide rod 46 when facing the flatbed contact glass 41, but the inclination of the guide rod 46 around the axis is restricted and the flatbed contact glass is restricted. Take a posture parallel to 41. At the same time, the position in the optical axis direction with respect to the flatbed contact glass 41 is determined. A specific configuration for this purpose and a specific configuration for similar tilt regulation and positioning when facing the first DF contact glass 42A will be described in detail later.

The first reading unit 45 can read the image of the original sheet by line-scanning the surface to be read of the original sheet on the flatbed contact glass 41 in the main scanning direction and moving in the sub-scanning direction. Further, the first reading unit 45 can read the image of the original sheet by line-scanning the image of the original sheet passing over the first DF contact glass 42A in the main scanning direction.

Inside the image reading unit 4, a timing belt is provided in an endless loop shape in which the bracket 48 of the first reading unit 45 is fixed at one position in the circumferential direction thereof. Further, inside the image reading unit 4, a plurality of timing pulleys on which a timing belt is hung without slack, a motor for rotationally driving any one of the timing pulleys, and the like are provided.

When performing the reading operation in the flatbed scanner mode, the first reading unit 45 moves from the home position to one side in the sub-scanning direction, for example, from the home position near the stop position shown by the solid line in FIG. 2 to the right side in the figure. Move to. Then, line scanning is performed by the integrated optical scanning unit 47 for each minute movement distance, and an image of the surface to be read (lower surface) of the document sheet on the flatbed contact glass 41 is read. When the reading operation is completed, the first reading unit 45 returns to the home position again. The range moved in the sub-operation direction for reading in this flatbed scanner mode corresponds to the first position.

When performing the scanning operation in the DF scanner mode, the first scanning unit 45 is a document sheet passing over the first DF contact glass 42A at the home position (below the first DF contact glass 42A) shown by the solid line in FIG. The image of the surface to be read (lower surface) is read. The stop position in this DF scanner mode corresponds to the second position.

In the illustrated copying machine, the transport passage portion from the nip position of the reading inlet roller pair 52d located on the upstream side of the transport direction of the first DF contact glass 42A to the discharge port 56 is along the DF contact glasses 42A and 42B. It constitutes a straight transport passage that extends in a substantially straight line. In the straight transfer passage, the original sheet conveyed from the original tray 51 by a plurality of transfer roller pairs 52c and 52d is transferred to the upper surface (first reading position) of the first DF contact glass 42A and the lower surface (first reading position) of the second DF contact glass 42B. Transport along the second reading position).

Further, in the straight transport passage 61, the original sheet carried in from the manual feed tray 5a is placed on the upper surface (first reading position) of the first DF contact glass 42A and the lower surface (second reading position) of the second DF contact glass 42B. It is also used when transporting along. Further, as shown by a virtual line in FIG. 2, the manual feed sheet set on the manual feed tray 5a in the open state and the card insertion slot 5b formed in the manual feed tray 5a in the closed state. When the manually set original sheet is conveyed substantially linearly along the upper surface (first reading position) of the first DF contact glass 42A and the lower surface (second reading position) of the second DF contact glass 42B. Is also used.

A card as a document can be inserted from the insertion slot 5b. The card is a hard sheet having a higher bending rigidity than the normal document sheet S, particularly a small-sized hard sheet, and is conveyed along the straight transfer passage. The small-sized hard sheet here means standard standard-sized cards made of resin or thick paper, such as a driver's license, ID card (identification card), bank card, credit card, and transportation. Electronic money cards such as systems can be raised. A straight aisle is suitable for transporting such cards.

FIG. 3 shows a conventional configuration for causing the integrated optical scanning unit 47 to take a parallel posture with respect to the flatbed contact glass 41 and the first DF contact glass 42A and to perform positioning in the optical axis direction. Is. On the upper surface of the integrated optical scanning unit 47 in the drawing, for example, protrusion-shaped sliding portions 100 for abutting the lower surfaces of both glasses 41 and 42A and sliding are formed at four corners. The number of the sliding portions 100 is at least 3 in total on both sides in the longitudinal direction, and preferably 2 or more on both sides in the longitudinal direction, for a total of 4 or more. FIG. 3A shows a state in which the flatbed contact glass 41 is in contact with the lower surface, and FIG. 3B shows a state in which the first DF contact glass 42A is in contact with the lower surface. As described above, conventionally, a configuration has been adopted in which a common sliding portion 100 is brought into contact with the lower surfaces of the flatbed contact glass 41 and the first DF contact glass 42A.

In FIG. 3, reference numeral 43a indicates a lower frame of the image reading unit 4, and reference numeral 43b indicates an upper frame. The flatbed contact glass 41 and the first DF contact glass 42A are fitted in a window portion formed on the upper frame 43b. Reference numeral 48c indicates a bearing 48c fixed to the lower surface of the bracket 48 holding the integrated optical scanning unit 47. The bearing 48c is provided substantially in the center of the integrated optical scanning unit 47 in the longitudinal direction (direction perpendicular to the paper surface), and the guide rod 46 penetrates the bearing 48c. In the illustrated example, two compression coil springs 49 are provided at both ends in the longitudinal direction to urge the integrated optical scanning unit 47 toward the glass on the bracket 48. Holding arm portions 48a are provided at both ends of the bracket 48 in the longitudinal direction, and the elongated holes 48b formed therein are provided so as to project outward from both measuring surfaces in the longitudinal direction of the integrated optical scanning unit 47. The support shaft 47a is inserted.

In this conventional configuration, there remains a problem that it is difficult to adjust the position of the integrated optical scanning unit 47 in the optical axis direction in order to deal with variations in parts. The scenes where this position adjustment is necessary are roughly divided into the following three. The first is the situation where position adjustment is required at the final stage of the manufacturing process due to variations in component accuracy and assembly accuracy. Secondly, for example, the customer changes whether the original is read while being brought into close contact with the first DF contact glass 42A (contact transport reading) or read with a gap open (non-contact transport reading). This is a scene where the position of the integrated optical scanning unit 47 needs to be adjusted at the customer's site, as in the case. Thirdly, for example, the main parts are standardized between the contact transfer reading model and the non-contact transfer reading model, and assembled at a position in the optical axis direction suitable for the model at the manufacturing stage of each model. ..

In the conventional configuration, in the first scene, for example, if the thickness of the glass varies or the amount of protrusion of the sliding portion varies, the sliding portion is abutted against the lower surface of the glass, and the position is reflected while the variation is reflected. Is decided, so there is no way to adjust it as it is. For this reason, it takes time and effort to replace the glass and the parts constituting the sliding portion. In the second scene, the first DF contact glass is changed to glass with a different thickness, and the distance between the original passage position and the bottom surface of the glass is set to the focal length, which involves the replacement of relatively expensive parts such as glass parts. The position will be adjusted at the customer's site. In the third scene as well, as in the second scene, it is necessary to prepare the first DF contact glass for each model, and it is not possible to standardize the parts accordingly.

Further, in the conventional configuration, the following problems of abnormal noise and vibration remain. That is, if there is a step at a position where the sliding portion 100 abuts on the path for moving the integrated optical scanning unit 47 between the lower part of the flatbed contact glass 41 and the lower part of the first DF contact glass 42A, the step is formed. The problem is that abnormal noise and vibration are generated when adding.

FIG. 3C is an explanatory diagram showing an example of a stepped portion. The step X between the lower surface of the upper frame 43b and the lower surface of the downstream end of the flatbed contact glass 41 and the step Y between the lower surface of the upper frame 43b and the lower surface of the upstream end of the first DF contact glass 42A are inevitable. It will occur. When passing through this step, there is a risk of generating abnormal noise or vibration due to the following collisions. When shifting from the higher side to the lower side at the step portion (when moving to the left side in FIG. 3C), the sliding portion 100 collides with the lower surface. On the contrary, when the step portion shifts from the lower side to the higher side (when moving to the right in FIG. 3C), the sliding portion 100 collides with the higher end face.

Further, when scanning a hard object such as a card with an automatic document transfer device, it is necessary to adopt a configuration in which the object to be read is conveyed straight, and as shown in FIG. 3 (c), a contact glass when scanning with a flat bed. The contact glass surface during DF scanning is placed at an angle with respect to the surface. Even when the integrated optical scanning unit 47 passes through this angled portion, there is a possibility that abnormal noise or vibration may occur due to a sudden change in the traveling direction.

Therefore, in the present embodiment, in order to position the first DF contact glass 42A in the optical axis direction, a positioning portion for positioning is provided separately from the sliding portion 100, and the positioning portion is provided at the location of the first DF contact glass 42A. A positioning member with which the positioning portion abuts is provided.
FIG. 4 is an explanatory view thereof, and FIG. 5 is an exploded perspective view. In the present embodiment, two cylindrical guided pins 110 are provided on both side surfaces of the integrated optical scanning unit 47 in the longitudinal direction so as to project outward in the longitudinal direction. The guided pin 110 functions as the positioning portion.

Guide plates 120 are provided on both sides in the long direction as members for positioning the two guided pins 110 on both side surfaces in the longitudinal direction with respect to the first DF contact glass 42A. The guide plate 120 is connected to a straight line portion 120a corresponding to the first DF contact glass 42A and an end portion of the straight line portion 120a on the flatbed contact glass 41 side, and is inclined at an angle with respect to the straight line portion 120a to be flat. It is provided with an inclined portion 120b extending linearly toward the bed contact glass 41 (see FIG. 5). The straight portion 120a is fixed to the peripheral edge of the window portion into which the first DF contact glass 42A is fitted on the lower surface of the upper frame 43b, for example, by adhesive. In the illustrated example, the end portion of the flatbed contact glass 41 of the inclined portion 120b is located on the right side in the figure with respect to the left end portion in the figure of the flatbed contact glass 41. Then, the inclined portion 120b is in a posture of straddling the angled portion between the flatbed contact glass 41 and the first DF contact glass 42A, and the right end portion in the figure is fixed to the upper frame by, for example, adhesive. There is. In FIG. 5, reference numeral 47b indicates a scanning region.

As shown in FIGS. 4 (a) and 4 (c), when moving from the flatbed contact glass 41 toward the first DF contact glass 42A (moving to the left side in the figure), the sliding portion on the tip side in the moving direction The guided pin 110 starts contacting the lower surface of the inclined portion 120b of the guide plate 120 (second contact state) within the range where 100 slides on the lower surface of the flatbed contact glass 41 (range of the first contact state). (Switches) and begins to be guided.

In the illustrated example, in FIG. 4C, the sliding member 100 on the left side and the guided pin 110 on the left side are at substantially the same position in the moving direction, and the same applies to the right side. Therefore, the end of the flatbed contact glass 41 of the inclined portion 120b is positioned on the right side of the figure with respect to the left end of the flatbed contact glass 41 so as to be guided as described above. The position of the end portion of the flatbed contact glass 41 of the inclined portion 120b is determined by the positional relationship between the sliding member 100 and the guided pin 110 in the moving direction.

Then, the sliding portion 100 on the tip side continues to be guided by the inclined portion 120b, and then is guided by the straight portion 120a to reach the stop position in the DF scanner mode and stop at the stop position. During this movement, the sliding portion 100 on the rear end side in the moving direction is also guided by the inclined portion 120b and the straight portion 120a in the same manner.

At the stop position, the position of the integrated optical scanning unit 47 in the optical axis direction is determined by the contact between the guided pin 110 at four locations in total, two at both ends in the longitudinal direction, and the straight portion 120a of the guide plate 120. The inclination with respect to the first DF contact glass 42A is defined. Specifically, if the lower surface of the straight portion 120a of the guide plate 120 is parallel to the first DF contact glass 42A, the integrated optical scanning unit 47 is parallel to the glass 42A.

According to this embodiment, the position of the integrated optical scanning unit 47 in the optical axis direction can be adjusted in various situations. In the final stage of the manufacturing process, for example, when the thickness of the first DF contact glass 42A varies or the diameter of the guided pin 11 varies, and as a result, the focus is lost, it is as follows. When attaching the guide plate 120 to the upper frame 43b, for example, by interposing a spacer for bonding, or by preparing attachment points on the frame whose positions are different from each other in the optical axis direction and changing the attachment points, the optical axis can be changed. It is possible to adjust the position of the direction. It is also possible to prepare guide plates 120 having different thicknesses in the optical axis direction and select the guide plates to be used for adjustment.

Further, when the customer changes between the contact transport reading and the non-contact transport reading, the position can be adjusted in the same manner as in the case of the final stage of the manufacturing process. Even when the guide plate 120 having a different thickness in the optical axis direction is replaced, the cost can be reduced as compared with the conventional case in which the first DF contact glass 42A is replaced. Even when the main parts are shared between the contact transfer reading model and the non-contact transfer reading model and assembled at the position in the optical axis direction suitable for the model at the manufacturing stage of each model, it is also the case at the final stage of the above manufacturing process. The position can be adjusted in the same way as above, and it is not necessary to prepare the first DF contact glass for each model at least.

Further, since the operator may place a document on the flatbed contact glass 41 and apply a force from above, the flatbed contact glass 41 needs to have a certain level of strength, and it is necessary to use thick glass accordingly. Compared to this, the first DF contact glass 42A has a much smaller external force, so that relatively thin glass can be used. However, in the conventional configuration, since the common sliding portion is brought into contact with the lower surface of each glass for positioning in the optical axis direction, for example, when the original is brought into close contact with the upper surface of the glass and read, the thickness is the same. I had no choice but to use the glass of. On the other hand, in the present embodiment, the positioning in the optical axis direction on the first DF contact glass 42A is performed by a positioning portion and a guide portion different from the sliding portion 100, so that the sliding portion 100 is commonly used. There is also an advantage that there is no restriction on the thickness of the glass.

Then, the guided pin 110 is guided by the guide plate 120 so that the sliding portion 100 does not come into contact with the steps X, Y and the angle portion as shown in FIG. 3 (c). Therefore, it is possible to prevent abnormal noise and vibration due to a collision with a step or the like. Since there is an angle between the straight portion 120a and the inclined portion 120b of the guide plate 120, some vibration may be exerted on the guide of the guided pin 110 as compared with the case where such an angle is not provided. This angle can be set to be smaller than the angle between the flatbed contact glass 41 and the first DF contact glass 42A in the conventional structure, and can be suppressed to a relatively small vibration.

FIG. 6 is an explanatory diagram of a modified example. In the device of this modification, the position of the guide plate 120 in the optical axis direction can be adjusted from the outside of the frame, which is the outside of the device. The guide plates 120 on both sides of the integrated optical scanning unit 47 in the longitudinal direction (direction perpendicular to the paper surface) are attached to the upper frame 43b so as to be movable at least in the optical axis direction by the links 121 and 121. Then, at the end of the guide plate 120 opposite to the flatbed contact glass 41 (left side in the drawing), the head portion 122a is located outside the upper frame 43b, and the shaft portion 122b is formed above and below the upper frame 43b. The tip of the position adjusting pin 122 passing through the through hole 160 having a long cross-sectional long hole is attached by screwing. By rotating the position adjusting pin 122 forward and reverse to change the rotation position and changing the vertical position in the through hole 160, the guide plate 120 is moved back and forth and displaced in the optical axis direction to change the position in the optical axis direction. Can be adjusted. In the figure, reference numeral 130 is a non-contact transport sheet for attaching to the first DF contact glass 42A, for example, by sticking, to switch to non-contact transport. An opening 130a for reading is formed. As a result of the original being conveyed while rubbing the surface of the sheet 130, it is possible to prevent the original from coming into contact with the surface of the first DF contact glass 42A. This sheet is attached when switching from contact transportation to non-contact transportation at the customer's site. Instead of using such a sheet, contact transfer and non-contact transfer may be switched by adjusting the transfer guide mechanism that defines the path of the document facing the first DF contact glass 42A.

As described above, in the present embodiment, the former is performed on the flatbed contact glass 41 and the latter is performed on the first DF contact glass 42A for the contact with the glass and the contact with the positioning member. Positioning on the optical axis may be performed in the opposite relationship.

1: Copier 1M: Device main body 3: Image forming unit 4: Image reading unit 5: ADF
5a: Manual feed tray 5b: Insertion port 6: Reader 11: Guided pin 41: Flatbed contact glass 42A: First DF contact glass 42B: Second DF contact glass 43a: Lower frame 43b: Upper frame 45: First reading Unit 46: Guide rod 47: Integrated optical scanning unit 47a: Support shaft 48: Bracket 48a: Holding arm 48b: Long hole 48c: Bearing 49: Compression coil spring 51: Document tray 52: Document transfer passage 52a: Pickup roller 52b : Separation roller 52c: Pull-up roller pair 52d: Read inlet roller pair 52e: Read outlet roller pair 52f: Paper ejection roller pair 53: Paper ejection tray 55: Cover 55a: Feed port 56: Discharge port 61: Straight transport passage 100 : Sliding part 110: Guided pin 120: Guide plate 120a: Straight part 120b: Inclined part 121: Link 122: Position adjustment pin 122a: Head 122b: Shaft part 130: Sheet 130a: Opening 160: Through hole DF: No. 1 S: Original sheet X: Step Y: Step

Japanese Unexamined Patent Publication No. 2006-115031

Claims (5)

In a reading device equipped with an image sensor that moves between different first and second positions provided with glass and selectively performs reading operations at both positions.
The image sensor is provided with a contact portion that abuts on the glass at the first position, and is provided with a positioning portion different from the contact portion for positioning the glass at the second position. A positioning member with which the positioning portion abuts is provided at the position.
At the first position, the image sensor reads while moving along a straight line.
The movement from the first position to the second position is a movement in a direction having an angle with the straight line.
While moving between the first position and the second position, the first contact state in which the contact portion and the glass are in contact, and the second contact state in which the positioning portion and the positioning member are in contact with each other. A reading device characterized in that the contact state is switched and this switching occurs during movement along the straight line . In the reading device according to claim 1 ,
A reading device having a glass on which a document is placed at the second position, and the optical axis of the image sensor is perpendicular to the surface of the glass at the second position. In the reading device according to claim 1 or 2 .
A reading device characterized in that the contact portion and the positioning portion are provided at four or more locations, respectively. In the reading device according to any one of claims 1 to 3 .
A reading device characterized in that the position in the optical axis direction at the second position of the positioning member can be adjusted from the outside of the device. In an image forming apparatus equipped with a reading device,
An image forming apparatus using the reading device according to any one of claims 1 to 4 as the reading device.

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