JP2017098715A - Image reading apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique having an attaching and detaching structure for facilitating cleaning and maintenance of a read unit installed within a transportation path.SOLUTION: An image reading apparatus comprises: the read unit which reads a document transported along the transportation path; an opening and closing unit openable and closable so as to open the transportation path; fixing means for fixing the read unit arranged along the transportation path; and energization means for detaching the read unit which energizes the fixed read unit toward the transportation path side. The fixing means can be unfixed from the transportation path side and when fixing of the read unit by the fixing means is unfixed, the read unit is pushed out toward the transportation path side from a housing part by the energization means for detaching the read unit.SELECTED DRAWING: Figure 13-a

Description

  The present invention relates to attachment of a reading unit of an image reading apparatus.

  In the sheet-through type reading apparatus, there is a need to attach and detach the reading unit for the purpose of maintenance, such as cleaning of dust that has entered the reading unit during use, failure of the reading sensor, or damage to the reading glass. Usually, the reading units arranged opposite to each other cope with a case where a reading unit fixed to the frame is elastically pressed with a reading unit facing the reading unit to read a thick original.

JP 2009-278383 A

  However, when the reading unit is attached / detached, the reading unit fixed to the frame must be released and the reading unit must be pulled out from the accommodating portion provided in the frame, which makes it difficult to remove the reading unit from the frame.

  An object of the present invention is to provide an image reading apparatus having an attachment / detachment structure for facilitating cleaning and maintenance of a reading unit installed in a conveyance path.

In order to solve the above-described problems, an image reading apparatus according to the present invention includes:
A reading unit for reading a document conveyed along a conveyance path;
An opening / closing unit that can be opened and closed to open the conveying path;
Fixing means for fixing the reading unit arranged along the conveyance path;
An urging means for detaching the reading unit that urges the fixed reading unit toward the conveyance path,
The fixing means can be released from the conveying path side, and when the fixing of the reading unit by the fixing means is released, the reading unit is pushed out from the accommodating portion to the conveying path side by the reading unit detaching biasing means. It is characterized by that.
.

  According to the present invention, it is possible to provide an image reading apparatus capable of easily maintaining a reading unit.

1 is a schematic diagram of an image reading apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram of a control unit of the image reading apparatus in FIG. 1. 1 is a front view of an image reading apparatus according to an embodiment of the present invention. FIG. 6 is another front view of the image reading apparatus according to the embodiment of the present invention. 1 is a top view of an image reading apparatus according to an embodiment of the present invention. FIG. 6 is another top view of the image reading apparatus according to the embodiment of the present invention. 1 is a schematic sectional view of an image reading apparatus according to an embodiment of the present invention. FIG. 6 is another schematic cross-sectional view of an image reading apparatus according to an embodiment of the present invention. 1 is a side view of an image reading apparatus according to an embodiment of the present invention. 1 is a side view of an image reading apparatus according to an embodiment of the present invention. 1 is a perspective view of an image reading apparatus according to an embodiment of the present invention. 1 is an enlarged view of a main part of an image reading apparatus according to an embodiment of the present invention. 1 is an enlarged view of a main part of an image reading apparatus according to an embodiment of the present invention. 1 is a partial schematic cross-sectional view of an image reading apparatus according to an embodiment of the present invention. 1 is a partial schematic cross-sectional view of an image reading apparatus according to an embodiment of the present invention.

FIG. 1 is a schematic view of an image reading apparatus A according to an embodiment of the present invention.
<Device configuration>
The image reading apparatus A is an apparatus that conveys one or a plurality of conveyance media S stacked on the paper feed tray 1 one by one through the apparatus along a route RT, reads the image, and discharges the image to the paper discharge tray 2. . The reading medium S to be read is, for example, a sheet such as OA paper, a check, a check, a business card, or a card, and may be a thick sheet or a thin sheet. Examples of the cards include an insurance card, a driver's license, and a credit card. The transport medium S also includes a booklet such as a passport. When targeting a booklet, a holder described later can be used. By storing the booklet in a spread state in the holder and placing it on the paper feed tray 1, the booklet is transported together with the holder and the image can be read.
<Feed>
A first transport unit 10 is provided as a feeding mechanism that feeds the transport medium S along the route RT. In the case of the present embodiment, the first transport unit 10 includes a feed roller 11 and a separation roller 12 disposed to face the feed roller 11, and sequentially transports the transport medium S on the paper feed tray 1 one by one in the transport direction D1. To do. A driving force is transmitted to the feed roller 11 from the driving unit 3 such as a motor through the transmission unit 5 and is rotationally driven in the direction of the arrow in the drawing (the forward direction in which the transport medium S is transported along the path RT). The transmission unit 5 is, for example, an electromagnetic clutch, and interrupts the driving force from the driving unit 3 to the feed roller 11.
<Driver>
For example, in this embodiment, the transmission unit 5 that connects the drive unit 3 and the feed roller 11 is in a state in which the driving force is transmitted in a normal state, and interrupts the driving force when the transport medium S is reversely fed. When the transmission of the driving force is interrupted by the transmission unit 5, the feed roller 11 is in a freely rotatable state. In addition, such a transmission part 5 does not need to be provided when driving the feed roller 11 only in one direction.
<Separation structure>
The separation roller 12 disposed to face the feed roller 11 is a roller for separating the transport medium S one by one, and is in pressure contact with the feed roller 11 with a constant pressure. In order to secure this pressure contact state, the separation roller 12 is provided so as to be swingable and is urged to the feed roller 11. The separation roller 12 is driven to rotate in the direction indicated by the solid line arrow (the direction opposite to the forward direction of the feed roller 11) when the driving force is transmitted from the driving unit 3 via the torque limiter 12a.

  Since the driving force transmission is restricted by the torque limiter 12a, the separation roller 12 rotates in a direction (indicated by a broken arrow) along with the feed roller 11 when contacting the feed roller 11. As a result, when a plurality of transport media S are transported to the pressure contact portion between the feed roller 11 and the separation roller 12, two or more transport media S are blocked so that they are not transported downstream except one. .

In the present embodiment, the separation roller 12 and the feed roller 11 constitute a separation mechanism. However, such a separation mechanism is not necessarily provided, and the conveyance medium S is sequentially fed to the path RT one by one. Any feeding mechanism may be used. In the case where a separation mechanism is provided, instead of the configuration of the separation roller 12, a separation pad that applies a frictional force to the transport medium S is brought into pressure contact with the feed roller 11 so as to have a similar separation operation. May be.
<Conveying structure>
The second transport unit 20 as a transport mechanism on the downstream side in the transport direction of the first transport unit 10 includes a drive roller 21 and a driven roller 22 driven by the drive roller 21 and has been transported from the first transport unit 10. The transported medium S is transported downstream. Driving force is transmitted to the driving roller 21 from the driving unit 4 such as a motor, and the driving roller 21 is rotationally driven in the direction of the arrow in the figure. The driven roller 22 is brought into pressure contact with the driving roller 21 at a constant pressure, and rotates with the driving roller 21. The driven roller 22 may be configured to be biased against the driving roller 21 by a biasing unit (not shown) such as a spring.

  The third transport unit 30 located downstream of the second transport unit 20 in the transport direction includes a drive roller 31 and a driven roller 32 that is driven by the drive roller 31 and is transported from the second transport unit 20. The transported medium S is transported to the paper discharge tray 2. That is, the third transport unit 30 functions as a discharge mechanism. Driving force is transmitted to the driving roller 31 from the driving unit 4 such as a motor, and the driving roller 31 is rotationally driven in the direction of the arrow in the figure. The driven roller 32 is brought into pressure contact with the driving roller 31 at a constant pressure, and is driven by the driving roller 31. The driven roller 32 may be configured to be biased against the driving roller 31 by a biasing unit (not shown) such as a spring.

The paper discharge tray 2 is pivotally supported via a first hinge 101 provided below the image reading apparatus A so as to be rotatable with respect to the image reading apparatus A. The first paper discharge tray 2a on the first hinge 101 side and the second paper discharge tray 2b connected to the tip end side of the first paper discharge tray 2a are connected to the first paper discharge tray 2a. And is pivotally supported.
<Image reading structure and control>
Here, in the image reading apparatus A of the present embodiment, since the image reading unit 70 disposed between the second transport unit 20 and the third transport unit 30 reads an image, the second transport unit 20 and the second transport unit 20 The three transport unit 30 transports the transport medium S at a constant speed. By always setting the transport speed to be equal to or higher than the transport speed of the first transport unit 10, it is possible to reliably avoid a situation in which the subsequent transport medium S catches up with the preceding transport medium S. For example, in this embodiment, speed control is performed so that the transport speed of the transport medium S by the second transport section 20 and the third transport section 30 is faster than the transport speed of the transport medium S by the first transport section 10. did.

Even when the transport speed of the transport medium S by the second transport section 20 and the third transport section 30 and the transport speed of the transport medium S by the first transport section 10 are the same, the drive section 3 is controlled. It is also possible to form a minimum interval between the preceding transport medium S and the subsequent transport medium S by intermittently shifting the feeding start timing of the subsequent transport medium S.
<Double feed detection>
When the double feed detection sensor 40 disposed between the first transport unit 10 and the second transport unit 20 is in contact with transport media S such as paper due to static electricity or the like, and passes through the first transport unit 10 ( In other words, this is an example of a detection sensor (a sensor for detecting the behavior and state of the sheet) for detecting this in the case of a double feed state in which the sheets are conveyed in an overlapping manner. Various sensors can be used as the double feed detection sensor 40, but in the case of the present embodiment, it is an ultrasonic sensor, and includes an ultrasonic transmission unit 41 and a reception unit 42, and is a conveyance medium such as paper. Double feed is detected based on the principle that the attenuation amount of the ultrasonic wave passing through the transport medium S is different between the case where S is transported one by one and the case where S is transported one by one.
<Registration sensor>
The medium detection sensor 50 arranged on the downstream side in the conveyance direction with respect to the double feed detection sensor 40 is located on the upstream side of the second conveyance unit 20 and on the upstream side arranged on the downstream side of the first conveyance unit 10. This is an example of a detection sensor (a sensor for detecting the behavior and state of a sheet). The position of the transport medium S transported by the first transport unit 10, specifically, the position of the transport medium S at the detection position of the medium detection sensor 50. Detect whether the end has reached or passed. As the medium detection sensor 50, various sensors can be used. In the case of the present embodiment, the medium detection sensor 50 is an optical sensor, and includes a light emitting unit 51 and a light receiving unit 52. The transport medium S is detected based on the principle that the intensity (the amount of received light) changes.

  In the case of this embodiment, when the leading edge of the transport medium S is detected by the medium detection sensor 50, the above medium is used so that the transport medium S reaches a position where the double feed detection sensor 40 can detect double feed. The detection sensor 50 is provided on the downstream side in the vicinity of the double feed detection sensor 40. The medium detection sensor 50 is not limited to the optical sensor described above. For example, a sensor (image sensor or the like) that can detect the end of the transport medium S may be used, or a lever-type sensor that protrudes into the path RT. It may be a sensor.

A medium detection sensor 60 different from the medium detection sensor 50 is disposed on the upstream side of the image reading unit 70. This is an example of a downstream detection sensor disposed downstream of the second transport unit 20 and detects the position of the transport medium S transported by the second transport unit 20. Various media detection sensors 60 can be used. In the case of the present embodiment, the medium detection sensor 60 is an optical sensor similar to the medium detection sensor 50, and includes a light emitting unit 61 and a light receiving unit 62. The transport medium S is detected based on the principle that the received light intensity (received light amount) changes due to arrival or passage. In the present embodiment, the medium detection sensors 50 and 60 are disposed on the upstream side and the downstream side in the transport direction of the second transport unit 20, respectively, but only one of them may be used.
<CIS layout>
The image reading unit 70 on the downstream side of the medium detection sensor 60 is, for example, optically scanned, converted into an electric signal and read as image data, and internally includes a light source such as an LED, an image sensor, and a lens array. Etc. In the case of this embodiment, the upper image reading unit 701 is accommodated in the accommodating units 1031 and 1041 provided in the lower unit 104 and the upper image reading unit 702 is read, and reads the front and back surfaces of the transport medium S.

  The upper image reading unit 701 includes an elastic member 7011 between the upper portion 1031 and the accommodating portion 1031. The upper image reading unit 701 is disposed so as to slide in and out of the path RT. It is locked by the engaging means so that there is no.

  FIG. 13 is a partial sectional view of an image reading apparatus according to the present invention. The image reading lower unit 702 includes reading-side engaging means 7021. When the image reading lower unit 702 is inserted into the accommodating portion 1401 provided in the lower unit 104 as shown in FIGS. 13-a and 13-b, The lower elastic member 75 projecting from the bottom member 75 is inserted while being urged, and is fitted and fixed by the lower unit engagement portion 1042 and the reading side engagement means 7021 as shown in FIG. Further, when the lower image reading unit 702 is pressed in the storage state of the lower image reading unit 702, the movement is restricted by the abutting portion 1403 provided in the lower frame storage portion 1401. Therefore, even when the image reading unit 702 is pushed in the state where the upper unit 103 is expanded, unlike the upper image reading unit 701, the upper unit 103 hits the abutting portion 1403 without being retracted from the route RT, and movement is restricted.

  When the upper unit 103 is in the retracted state, the upper image reading unit 701 is pressed with a predetermined force against the lower image reading unit 702, and the lower image reading unit 702 comes into contact with the abutting portion 1403 and stops. When the transport medium S ′ thicker than the path RT ′ formed between the upper image reading unit 701 and the lower image reading unit 702 enters between the image reading units 70, the upper image reading unit 701 is pushed up by the transport medium S ′. And retreats to the upper unit 103 side. When the transport medium S ′ has passed between the reading units 70, the upper image reading unit 701 is again pressed against the lower image reading unit 702 by the elastic member 7011.

  Here, the Example regarding this invention is disclosed in detail. When the maintenance is performed, the upper unit 103 is expanded as shown in FIG. At this time, the path RT side of the upper image reading unit 701 and the lower image reading unit 702 is opened.

  FIG. 12 is a perspective view of the lower image reading unit 702 of the image reading apparatus A according to the embodiment of the present invention. 12A shows a state where the image reading lower unit 702 is removed, and FIG. 12B shows a state where the image reading lower unit 702 is stored.

  For simplification, the upper unit 103 is omitted in FIG. Further, the image reading lower unit 702 is regulated by adjusting the urging force of the abutment 1043 or the elastic member 75 so that it does not retract from the path RT even if it is pressed from the opposing image reading upper unit 701 in the housed state. .

  13B, when the upper unit 103 is expanded as shown in FIG. 8 and the reading side engaging means 7021 is bent by inserting a tool from a hole provided on the path RT side, the image reading lower unit 702 is obtained. 13-b, the lower elastic member 75 is biased upward by the lower elastic member 75, so that the lower image reading unit 702 is lifted to the path RT by the lower elastic member 75, and the lower image reading unit 702 is moved to the path RT. Jump out. With this structure, the lower image reading unit 702 can be easily detached from the image reading apparatus A, and the maintainability can be improved.

  In the present embodiment, an example is shown in which the upper image reading unit 701 and the lower image reading unit 702 are arranged opposite to each other on the path RT. However, the present invention is not limited to this, and the lower image reading unit 702 is disposed on the path RT. A configuration may be adopted in which only one side of the carrier medium S is read and arranged on only one side. Further, the image reading upper unit 701 and the image reading lower unit 702 may not be arranged to face each other, but may be arranged with an interval in the transport direction of the route RT.

  Further, in this embodiment, the example in which the lower image reading unit 702 is fixed by fitting and fixing by the lower unit engaging portion 1042 and the reading side engaging means 7021 is not limited to this. For example, a screw or the like is fastened. The same effect can be obtained when the image reading lower unit 702 is fixed to the lower unit 104 using a member, or when the image reading lower unit 702 is fixed to the lower unit 104 using a magnetic force or the like.

  Further, in this embodiment, the image reading lower unit 702 hits the lower frame abutting portion 1403 and the image reading lower unit 702 restricts the retreat from the path RT, but for example, an elastic member that presses the image reading upper unit 701 By making the force of the lower elastic member 75 larger than the force of 7011, the lower image reading unit 702 may not be retracted when the document enters.

  Further, when the lower surface of the image reading unit 702 is covered with a conductive member 76 made of a metal such as stainless steel as shown in FIG. 13, the conductive member 76 functions as a noise shielding material for electrical components such as CIS 71 and at the same time, The ground plane is exposed on the lower frame side of the lower image reading unit 702.

As shown in FIG. 13B, the lower elastic member 75 applies a predetermined pressure necessary for electrical connection to the lower image reading unit 702 at the storage position of the lower image reading unit 702. When the lower elastic member 75 is brought into electrical contact with the lower conveyance sheet metal 141 as shown in FIG. 13A, the lower elastic member 75 is electrically connected to the lower unit 104. Now, as shown in FIG. 13, when the lower image reading unit 702 is assembled to the lower unit 104, the lower image reading unit 702 is inserted while the conductive member 76 is urged by the lower elastic member 75. At the accommodation completion position, the image reading lower unit 702 can be operated without being electrically influenced even when it is electrically connected to the lower unit 104 and passes through the path RT while the transport medium S is charged.
<Explanation of block diagram>
The control unit 80 will be described with reference to FIG. FIG. 2 is a block diagram of the control unit 8 of the image reading apparatus A.

  The control unit 80 includes a CPU 81, a storage unit 82, an operation unit 83, a communication unit 84, and an interface unit 85. The CPU 81 controls the entire image reading apparatus A by executing a program stored in the storage unit 82. The storage unit 82 includes, for example, a RAM, a ROM, and the like. The operation unit 83 includes, for example, a switch, a touch panel, and the like, and accepts an operation from the operator.

  The communication unit 84 is an interface that performs information communication with an external device. When a PC (personal computer) is assumed as the external device, examples of the communication unit 84 include a USB interface and a SCSI interface. In addition to such a wired communication interface, the communication unit 84 may be a wireless communication interface, and may include both wired communication and wireless communication interfaces.

The interface unit 85 is an I / O interface that inputs and outputs data with the actuator 86 and the sensor 87. The actuator 86 includes the drive unit 3, the drive unit 4, the transmission unit 5, and the like. The sensor 87 includes a double feed detection sensor 40, medium detection sensors 50 and 60, an image reading unit 70, and the like.
<Driving by receiving start instruction from PC>
A basic operation of the image reading apparatus A will be described. For example, when receiving an image reading start instruction from an external personal computer to which the image reading apparatus A is connected, the control unit 80 starts driving the first conveyance unit 10 to the third conveyance unit 30. The transport medium S stacked on the paper feed tray 1 is transported one by one from the transport medium S positioned at the bottom.
<Control during double feeding>
In the middle of the conveyance, the conveyance medium S is determined by the double-feed detection sensor 40 to determine whether or not there is a double-feed. If it is determined that there is a double feed, the transport is stopped or the capture of the subsequent transport medium S by the first transport unit 10 is stopped, and the transport medium S in the double feed state is discharged as it is. It may be.
<Start reading according to the output of the registration sensor>
The control unit 80 starts reading the image by the image reading units 70 and 70 of the transport medium S transported by the second transport unit 20 at a timing based on the detection result of the medium detection sensor 60, and reads the read image. Temporarily memorize and send to external PC. The transport medium S from which the image has been read is discharged to the paper discharge tray 2 by the third transport unit 30, and the image reading process for the transport medium S is completed.
<Discharge structure>
FIG. 3 is a front view of the image reading apparatus A according to the embodiment of the present invention in a state where the paper discharge tray 2 is unfolded.

  A display screen 93 is provided on the display panel 90 at the upper front, and operation keys 122 are provided at adjacent positions.

  The lower panel 91 in the lower front is provided with a discharge opening 92, and the transport medium S transported by the third transport unit 30 is discharged.

  FIG. 4 is a front view of the image reading apparatus A according to the embodiment of the present invention in a state in which the paper discharge tray 2 is stored.

  The paper discharge tray 2 is pivotally supported via a first hinge 101 provided below the image reading device A so as to be rotatable with respect to the image reading device A, and the first paper discharge tray 2a and The front surface of the main body is covered by the second paper discharge tray 2b.

  The first paper discharge tray 2a is attached to the main body 100 of the image reading apparatus A so as to be rotatable about the first hinge 101 as a fulcrum. The first paper discharge tray 2a is formed in the same size as the combined area of the lower panel 91 and the discharge opening 92, and rotates around the first hinge 101 in the storage state of the paper discharge tray 2 as shown in FIG. Then, it is folded so as to cover the lower panel 91 and the discharge opening 92.

  The second paper discharge tray 2b is formed in the same size as the display panel 90, and the second hinge 102 provided at the front end of the first paper discharge tray 2a in the storage state of the paper discharge tray 2 as shown in FIG. It rotates as a fulcrum and is folded so as to overlap the display panel 90.

  FIG. 5 is a top view of the image reading apparatus A according to the embodiment of the present invention in a state where the paper discharge tray 2 is unfolded.

  The transport medium S transported by the third transport unit 30 is discharged to the first paper discharge tray 2a through the discharge opening 92, and reaches the second paper discharge tray 2b and is guided depending on the size of the transport medium S. .

  The first discharge tray 2a is provided with a discharge position adjusting member 120 so as to be rotatable. When a small-sized transport medium S is discharged from the first discharge tray 2a such as a business card. In addition, the position at which the transport medium S stops can be adjusted by rotating it to the upright state, and the discharged transport medium S can be made difficult to be scattered.

Further, the second paper discharge tray 2b is provided with a translucent part 121, which is disposed at a position overlapping the operation key 122 provided on the display panel. The operation key 122 is a power button for turning on and off the main body, and is configured so that the button is lit when the power is on. The translucent part 121 arranged at a position overlapping with the operation key 122 can confirm whether the operation key 122 is lit or unlit even when the paper discharge tray 2 is stored. The power state of A can be confirmed.
<Configuration of display panel>
In the storage state of the second paper discharge tray 2b, a display screen 93 is arranged on the display panel 90 provided at a position overlapping the second paper discharge tray 2b.

  The display screen 93 is arranged so that the feeding tray 110 and the conveyance path width W and the center line X are at the same position. The A4 letter size is configured to be fed as the maximum transport path width Wmax of the image reading apparatus A according to the embodiment of the present invention, and the width is Wmax = 216 mm. The width of the display screen 93 is 224 mm, which is longer than Wmax.

Accordingly, for example, the read image can be displayed on the display screen 93 in actual size, and the finished state can be easily confirmed, so that convenience for the user can be improved.
<Details of feeding structure>
FIG. 6 is a top view of the image reading apparatus A according to the embodiment of the present invention in a state in which the paper discharge tray 2 is stored.

The feeding tray 110 is provided with a regulating member 111 that is slidably mounted in a direction orthogonal to the transport direction according to the size of the transport medium S to be arranged.
<Details of upper unit>
FIG. 7 is a schematic cross-sectional view of an image reading apparatus A according to an embodiment of the present invention.

  The main body 100 includes an upper unit 103 and a lower unit 104, and the upper unit 103 is attached to the lower unit 104 so as to be rotatable about the main body hinge 105.

  Since the upper unit 103 includes a display screen 93 having a width exceeding the maximum conveyance path width Wmax and a support frame sheet metal of the display screen 93 on the display panel 90, the center of gravity in a state where the upper unit 103 is expanded as shown in FIG. Is largely shifted forward in the transport direction from the state in which the upper unit 103 is housed as shown in FIG.

Accordingly, if there is momentum when the upper unit is expanded, the image reading apparatus A may fall down. However, in the image reading apparatus A according to the present embodiment, the upper unit 103 is provided with the protrusion 130. Even if the center of gravity shifts due to the development of the image reading apparatus A, the image reading apparatus A can be prevented from falling. The protruding amount of the protruding portion 130 is a protruding amount that fits below the paper discharge tray 2 in the storage state of the upper unit 103 and the paper discharge tray 2 as shown in FIG. In the unfolded state of 103, the amount of protrusion is such that it is located further forward than the center of gravity of the upper unit 103 in the transport direction. Thus, while preventing the image reading apparatus A from falling due to the unfolding of the upper unit 103, it is possible to prevent the image reading apparatus 2 from protruding more than necessary in the stored state in which the paper discharge tray 2 is stored, and not to disturb the user.
<Output tray angle adjustment>
Further, on the upper surface of the projecting portion 130, a tray support portion 131 that is brought into contact with the lower surface of the paper discharge tray 2 when it is unfolded is rotatably provided.

  As shown in FIG. 9, the paper discharge tray 2 is supported by the protruding portion 130 in the unfolded state, and can receive the transport medium S to be discharged. As shown in FIG. 10, when the tray support 131 is rotated so as to protrude upward from the upper surface of the protruding portion 130, it contacts the lower surface of the discharge tray 2 to support the discharge tray 2. The angle of the paper discharge tray 2 can be adjusted from the state of FIG.

  For example, in the state of FIG. 10, compared to the state of FIG. 9, the discharge tray 2 is lifted upward in the vertical direction, and the position where the leading edge of the transport medium S lands on the upper surface of the discharge tray 2 is changed. Can do. Accordingly, in the state shown in FIG. 9, in the case where the leading end of the transport medium S to be ejected contacts and pushes out the rear end of the transport medium S that has already been ejected, the paper discharge tray 2 as shown in FIG. In addition to the action of moving the rear end of the already ejected transport medium S to the lower unit 104 side, the leading end of the subsequent transport medium S is securely placed on the upper surface of the already ejected transport medium S. Can land on. With such a configuration, the alignment of the discharged transport medium S on the paper discharge tray 2 can be remarkably improved.

The tray support 131 may be configured to support the paper discharge tray 2 even in the middle of the rotation range, and the angle of the paper discharge tray 2 may be adjusted in a plurality of stages. In that case, the transport medium S can be received at an angle with the highest alignment on the paper discharge tray 2 for each transport medium S, and usability can be improved.
<Grounding of upper unit>
FIG. 11 is a perspective view showing a state where the upper unit 103 of the image reading apparatus A according to the embodiment of the present invention is developed.

  If the upper unit 103 is pivoted vigorously when the upper unit 103 is housed, a large impact may be applied when the upper unit 103 comes into contact with the lower unit 104 and a loud sound may be generated. In the image reading apparatus A according to the present embodiment, metal upper elastic members 140 are provided on both sides of the separation roller 12 of the upper unit 103.

  When the upper unit 103 is in the storage state, the upper elastic member 140 is in the storage state while being elastically urged by the contact portion 1411 of the lower conveyance sheet metal 141 provided on the lower unit 104 side. The end of the upper elastic member 140 on the side attached to the upper unit 103 is electrically connected to the ground side of the electrical component provided in the upper unit 130, and the lower elastic member 140 comes into contact with the contact portion 1411 to lower the lower part. Conduction is conducted to the ground side of the electrical component arranged in the unit.

  Therefore, when the upper unit 103 is stored, the upper unit 103 side can be grounded by the elastic buffer member.

A Image reading apparatus S Transport medium S ′ Thick transport medium RT Path RT ′ Path between image reading upper and lower units 1 Paper feed tray 2 Paper discharge tray 2 a First paper discharge tray 2 b Second paper discharge tray 3, 4 Drive unit 5 Transmission Section 10 First transport section 11 Feed roller 12 Separation roller 20 Second transport section 21 Drive roller 22 Driven roller 30 Third transport section 31 Drive roller 32 Followed roller 40 Double feed detection sensors 50, 60 Medium detection sensor 70 Image reading unit 701 Upper reading unit 7011 Elastic member 702 Lower reading unit 7021 Reading side engaging means 71 Contact image sensor (CIS)
75 Lower elastic member 76 Conductive member 77 Reading unit engagement means 80 Control unit 84 Communication unit 90 Display panel 91 Lower panel 93 Display screen 100 Main body 101 First hinge 102 Second hinge 103 Upper unit 1031 Upper unit housing portion 104 Lower unit 1041 Lower unit accommodating portion 1042 Lower unit engaging portion 1043 Abutting portion 105 Main body hinge 111 Restricting member 120 Discharge position adjusting member 121 Translucent portion 122 Operation key 130 Protruding portion 131 Tray support portion 140 Upper elastic member 141 Lower conveying sheet metal 1411 Contact point Part

Claims (7)

A reading unit for reading a document conveyed along a conveyance path;
An opening / closing unit that can be opened and closed to open the conveying path;
Fixing means for fixing the reading unit arranged along the conveyance path;
An urging means for detaching the reading unit that urges the fixed reading unit toward the conveyance path,
The fixing means can be released from the conveying path side, and when the fixing of the reading unit by the fixing means is released, the reading unit is pushed out from the accommodating portion to the conveying path side by the reading unit detaching biasing means. An image reading apparatus.   The image reading apparatus according to claim 1, wherein the reading unit detaching biasing unit is in contact with the reading unit in the housing portion. Another reading unit disposed on the opposite side of the reading unit with respect to the conveyance path;
The image reading apparatus according to claim 1, further comprising: a sliding urging unit that urges the other reading unit toward the conveyance path.   The image reading apparatus according to claim 3, wherein the reading unit and the other reading unit are disposed to face each other across the conveyance path.   The image reading apparatus according to claim 1, wherein the fixing unit is an abutting portion that acts on a portion of the reading unit that faces the conveyance path.   5. The image reading apparatus according to claim 3, wherein an urging force of the reading unit detaching urging unit is larger than an urging force of the sliding urging unit. The reading unit has a conductive portion at a position in contact with the urging means for detaching the reading unit,
The image reading apparatus according to claim 1, wherein the reading unit urging means is a conductive member.