JP5994632B2 - Image reading device - Google Patents

Description

  The present invention relates to an image reading apparatus.

  Conventionally, an image reading apparatus that reads an image of a document inserted in a document insertion path has been proposed. The image reading apparatus includes, for example, a tray that can be opened and closed on the upstream side of the document insertion path. For example, the tray is opened when the image reading apparatus is used. For example, the tray is closed when the image reading apparatus is not used. The tray includes a pair of walls on both sides in the width direction orthogonal to the document insertion direction, for example, on the surface thereof (see, for example, Patent Document 1). The pair of walls align the positions in the width direction of the document.

JP 2008-68981 A

  In the image reading apparatus of Patent Document 1, a pair of walls sandwich a pickup roller provided at an upstream end portion of the document insertion path in the housing from both sides in the width direction. The pair of walls are moved in the width direction. For this reason, in the image reading apparatus of Patent Document 1, there is a possibility that the pair of walls interfere with the pickup roller when the tray is closed.

  In view of the above, an object of the present invention is to prevent the pair of walls provided on the tray from interfering with a member on the housing side when the tray is closed in the image reading apparatus.

  The image reading apparatus according to the present invention, which has been made to achieve the above object, includes a first extending portion extending in a width direction orthogonal to a document conveying direction, and an upstream side from the first extending portion in the conveying direction. A housing having a pair of extended second extending portions; a reading portion that is built in the housing and reads an image of a document; and a front surface and a back side that is farther from the first extending portion than the front surface. A first open position spaced from the first extension part and a first closed position approaching the first extension part. The width between the first tray displaceable and the first tray standing upright on the surface and positioned on both sides in the width direction and approaching each other and spaced apart from each other A pair of walls having a pair of walls movable in a direction, and between the pair of walls in the width direction The first protrusion protruding from the surface of the first tray, and at least a portion of the first protrusion in the width direction is located at the same position, and the first extension of the housing extends from the first extension. A second projecting portion projecting toward the back side, wherein a gear for interlocking the pair of walls is housed on the back side of the first projecting portion, and the first projecting portion and the first tray At least the surface is located between the pair of second extending portions when the first tray is located at the first closed position, and the pair of wall portions is located at the approaching position. The pair of walls are in contact with a part of the first tray, and the pair of walls are positioned on both sides in the width direction of the first protrusion and the second protrusion when positioned at the approach position. Yes.

  In the image reading apparatus of the present invention configured as described above, the first tray is swingably provided in the housing. Then, by the swinging, the first tray has a first open position that is separated from the first extension portion that extends in the width direction in the housing, and a first closed position that approaches the first extension portion. Displace between.

  When the first tray is located at the first closed position, at least the surface of the first protrusion and the first tray is located between the pair of second extending portions. For this reason, the image reading apparatus of the present invention can be stored compactly when not in use.

  In addition, a pair of wall portions including a pair of walls are provided upright on the surface of the first tray. The pair of walls are interlocked in the width direction between an approaching position approaching each other and a separating position separating from each other by a gear housed on the back side of the first protrusion. Further, the pair of wall portions abuts a part of the first tray when positioned at the approach position. And thereby, a pair of wall is located in the width direction both sides of the 2nd protrusion part which protruded from the 1st extension part of the housing | casing, and the said 1st protrusion part, when it is located in the said approach position. . Therefore, when the first tray is disposed at the first closed position, the pair of walls are prevented from interfering with the second protrusion on the housing side.

  And the height from the 1st tray surface of each wall is the height which match | combined the protrusion amount from the 1st tray surface of the 1st protrusion part, and the protrusion amount from the 1st extension part of a 2nd protrusion part. The position of the document in the width direction can be satisfactorily adjusted by the pair of walls. And the wall which has such height can also be easily accommodated, without folding a wall part by utilizing the space of the width direction both sides of a 1st protrusion part and a 2nd protrusion part. it can.

  In the present invention, the upstream end portions in the transport direction of the pair of walls may include tapered surfaces that are separated from each other toward the upstream side in the transport direction. In that case, when the original is inserted between the pair of walls from the upstream side in the conveyance direction, the original is guided by the tapered surface, so that the insertion operation is facilitated.

  In the present invention, the height of the pair of walls from the surface of the first tray may be highest at the most downstream portion in the transport direction. When a firm document such as a business card is being conveyed, the upstream end (that is, the rear end) of the document in the conveying direction may be lifted from the surface of the first tray when the front end is nipped by a roller or the like. . Even in such a case, if the most downstream portion in the conveyance direction of each wall is configured to be the highest, it is possible to satisfactorily suppress the position of the document from shifting between the pair of walls in the width direction.

Further, in the present invention, the swingably provided on the upstream end of the conveying direction of the first tray, the first tray surface when said first tray is disposed in the first open position A second open position connected to the surface, and a second closed position arranged to overlap the first extending portion of the housing when the first tray is arranged in the first closed position, A second tray that is displaceable between the second tray and a second tray that is swingably provided at an upstream end of the second tray in the transport direction, and the first tray is disposed at the first open position, and the second tray Is disposed at the second open position, the surface is connected to the surface of the second tray, and the first tray is disposed at the first closed position. A third closed position disposed on the downstream side in the transport direction of the housing when disposed at the second closed position; The third and the tray can be displaced between, may be provided.

  In this case, if the first tray, the second tray, and the third tray are disposed at the first open position, the second open position, and the third open position, respectively, the surfaces of the trays are connected to hold a large document. Can do. Further, if the first tray, the second tray, and the third tray are disposed at the first closed position, the second closed position, and the third closed position, respectively, at least the surface of the first tray has a pair of second extending portions. Arranged between. At that time, the second tray is disposed so as to overlap the first extending portion of the housing. Furthermore, at that time, the third tray is disposed so as to overlap the downstream side of the casing in the transport direction. Therefore, the image reading apparatus can be stored in a very compact manner.

  In that case, a plurality of grooves along the transport direction may be formed on at least one surface of the first tray, the second tray, and the third tray. In this case, when the first tray, the second tray, and the third tray are all arranged at the open position and the user places the document on the surface, the user can remove the groove and the widthwise end of the document. By comparing with the edge, it can be confirmed whether or not the document is inclined with respect to the conveyance direction. Further, by aligning the widthwise edge of the document with the groove, the user can place the document along the transport direction even if the document is a non-standard document.

  In this case, a display unit or an operation unit provided on the surface of the housing is provided, and at least one of the first tray, the second tray, and the third tray is the first tray. Is located at the first closed position, the second tray is located at the second closed position, and the third tray is located at the third closed position. The first tray is located at the first open position, the second tray is located at the second open position, and the third tray is located at the third open position. In the open state, it may be located downstream of the opening in the transport direction.

  In this case, even when the trays are disposed at the closed position, the user can view the display on the display unit through the opening or operate the operation unit through the opening. it can. In addition, since the pair of walls are disposed on the downstream side in the transport direction from the opening, the position in the width direction of the document transported to the reading unit can be satisfactorily matched.

A plan view (A), a front view (B), a bottom view (C), a right side view (D), a rear view (E), and a perspective view showing a state in which a tray of an image reading apparatus to which the present invention is applied is opened. (F). A plan view (A), a front view (B), a bottom view (C), a right side view (D), a rear view (E), and a perspective view (F) showing a state in which the tray of the image reading apparatus is closed. is there. It is explanatory drawing for demonstrating the internal structure of an image reading apparatus. FIG. 3 is a plan view (A) and a rear view (B) showing a periphery of a wall portion of the image reading apparatus. FIG. 3 is a perspective view illustrating a state in which a wall portion of the image reading apparatus is closest. It is explanatory drawing for demonstrating the internal structure of an image reading apparatus.

  Next, an embodiment of the present invention will be described with an example. The image reading apparatus 1 exemplified in the present embodiment reads a document image and writes data corresponding to the read image to a USB memory (not shown) or sends it to a personal computer or the like via a USB cable (not shown). Device. In the following description, the respective parts of the image reading apparatus 1 will be described using the respective directions of the top, bottom, left, and right, which are also shown in the drawing, in order to facilitate understanding of the relative positional relationship between them.

[Schematic Configuration of Embodiment]
FIG. 1 is a diagram illustrating the configuration of the image reading apparatus 1. Specifically, (A) is a plan view, (B) is a front view, (C) is a bottom view, (D) is a right side view, (E) is a rear view, and (F) is a perspective view. FIG. 2 is a diagram illustrating the configuration of the image reading apparatus 1. Specifically, (A) is a plan view, (B) is a front view, (C) is a bottom view, (D) is a right side view, (E) is a rear view, and (F) is a perspective view. As shown in FIGS. 1 and 2, the image reading apparatus 1 includes a first tray 50, a second tray 70, and a third tray 80. FIG. 1 is a diagram illustrating the image reading apparatus 1 in a state where the first tray 50, the second tray 70, and the third tray 80 are opened. FIG. 2 is a diagram illustrating the image reading apparatus 1 in a state where the first tray 50, the second tray 70, and the third tray 80 are closed.

  As shown in FIG. 1F, the first tray 50 is provided at the rear portion of the casing 10, that is, upstream in the document transport direction, so as to be swingable about a left-right axis via a hinge 51. The second tray 70 is connected to the end of the first tray 50 opposite to the end connected to the housing 10 via a hinge 71 so as to be swingable about a horizontal axis. . Further, the third tray 80 is connected to the end of the second tray 70 opposite to the end connected to the first tray 50 via a hinge 81 so as to be swingable about a horizontal axis. Has been. The first tray 50, the second tray 70, and the third tray 80 include a surface 52, a surface 72, and a surface 82, respectively. The first tray 50 includes a back surface 59.

  When the first tray 50, the second tray 70, and the third tray 80 are opened in a direction away from the housing 10, the front surface 52 and the front surface 72 of the first tray 50, the second tray 70, and the third tray 80, respectively. And the surface 82 constitutes a series of surfaces. A pair of blades 90 having a swing axis at the center in the left-right direction is provided at the edge of the third tray 80 opposite to the side connected to the second tray 70. The third tray 80 can be extended by extending the blades 90. The blades 90 can be stored in the third tray 80.

  Further, when the first tray 50, the second tray 70, and the third tray 80 are closed in the direction approaching the casing 10, as shown in FIG. 2, the first tray 50, the second tray 70, and the third tray 80 are provided. Are arranged along the outer surface of the housing 10.

  FIG. 3 is an explanatory diagram for explaining the internal structure of FIG. As shown in FIG. 3, the housing 10 includes an upper housing 11, a lower housing 12, and a pair of side plates 13. The upper housing 11 and the lower housing 12 are arranged one above the other. The pair of side plates 13 is provided with the upper housing 11 and the lower housing 12 sandwiched from the left and right directions. Here, the upper housing 11, the lower housing 12, and the pair of side plates 13 correspond to an example of the housing. The pair of side plates 13 are configured integrally with the lower housing 12. The upper housing 11 is mounted between the pair of side plates 13 from above the lower housing 12. In addition, the pair of side plates 13 protrudes forward, backward, and upward with respect to the upper housing 11 and the lower housing 12 combined vertically. The upper housing 11 includes a first extension part 11B. The first extending part 11 </ b> B is the upper surface of the upper housing 11. The first extending portion 11B extends in the left-right direction, that is, the document width direction. Each of the pair of side plates 13 includes a second extending portion 13A and a second extending portion 13B. The second extending portion 13A and the second extending portion 13B are portions protruding rearward from the upper housing 11 and the lower housing 12 of the pair of side plates 13. That is, the second extending portion 13A and the second extending portion 13B extend backward from the first extending portion 11B, that is, upstream in the document transport direction. The first tray 50 is swingably connected via a hinge 51 between the second extending portion 13A and the second extending portion 13B of the pair of side plates 13. The first tray 50 is displaceable between a first open position that is separated from the first extension portion 11B and a first closed position that is close to the first extension portion 11B.

  When the first tray 50 is disposed at the first open position opened in the direction away from the housing 10, as shown in FIGS. A chute 12A that forms a series of surfaces with the surface 52 of the tray 50 is provided. A separation roller 15 is provided in front of the chute 12A. The separation roller 15 cooperates with the separation mechanism 16 attached to the rear end of the upper housing 11 to each of the surface 52, the surface 72, and the surface of the first tray 50, the second tray 70, and the third tray 80. Documents placed on 82 can be separated one by one and conveyed forward. As illustrated in FIG. 3, the separation mechanism 16 includes a second protrusion 16A. The second protrusion 16 </ b> A is the rear end of the separation mechanism 16. 16 A of 2nd protrusion parts are located in the center part of the left-right direction of the housing | casing 10, ie, the width direction. The second projecting portion 16A projects further rearward than the rear end surface 11A of the upper housing 11. The separation mechanism 16 includes a separation pad 16B. The separation pad 16 </ b> B is in contact with the separation roller 15.

  A pair of upper and lower LF rollers 17 are disposed in front of the separation roller 15 inside the housing 10. A pair of upper and lower paper discharge rollers 18 are disposed at the front ends of the upper housing 11 and the lower housing 12. The document conveyed forward by the separation roller 15 is conveyed from the LF roller 17 toward the paper discharge roller 18 as indicated by a thick arrow in FIG. The document conveyed by the LF roller 17 is discharged to the outside of the housing 10 via the discharge roller 18. A pair of Contact Image Sensor (hereinafter referred to as “CIS”) units 21 and 22 for reading an image of the document from both above and below are provided above and below the document transport path from the LF roller 17 to the paper discharge roller 18. ing. The pair of CIS units 21 and 22 is an example of a reading unit.

  Furthermore, a touch panel 25 is provided at the center of the first extension portion 11B of the upper housing 11. The touch panel 25 is an example of a display unit and an operation unit. As shown in FIG. 3, the touch panel 25 is inclined slightly forward from upward in the vertical direction. Therefore, the visibility and operability from the front of the image reading apparatus 1 can be improved.

  As shown in FIG. 1E, the rear end surface 12B of the lower housing 12 is provided with an insertion port 31, USB ports 32 and 33, a power connector 34, a security slot 35, and the like. The insertion port 31 is a hole for inserting a hard plastic card or the like. The insertion port 31 is provided at a position near the upper right of the rear end surface 12B. Then, the card or the like inserted from the insertion slot 31 is transported to the document reading range by the CIS units 21 and 22.

  The USB port 32 is provided below the insertion port 31. The USB port 32 is a port to which a USB memory can be attached. When a USB memory is attached to the USB port 32, data corresponding to an image read via the CIS units 21 and 22 can be written to the USB memory.

  The USB port 33 is provided below the center of the rear end surface 12B. The USB port 33 is a port to which a USB cable can be attached. When the USB port 33 and the USB port of the personal computer are connected via a USB cable, data corresponding to an image read via the CIS units 21 and 22 can be transmitted to the personal computer.

  The power connector 34 is provided on the left side of the USB port 33. An AC adapter (not shown) is attached to the power connector 34. As a result, power can be supplied to the motor (not shown) for driving the separation roller 15 and the like, the CIS units 21 and 22 and the like via the power connector 34.

  The security slot 35 is provided below the left end of the rear end face 12B. The security slot 35 is a slot into which an anti-theft device such as a lock (not shown) can be mounted.

[Detailed Configuration of Tray of Embodiment]
Next, the surface 52 of the first tray 50 is provided with a pair of wall portions 53 that can approach and separate in the left-right direction, that is, the width direction. The pair of wall portions 53 are movable in the left-right direction, that is, in the width direction, between an approaching position as shown in FIGS. 4 and 5 and an approaching position as shown in FIG. The pair of wall portions 53 are so-called document width guides. A mechanism for interlocking the pair of wall portions 53 will be described with reference to FIG. FIG. 4 is a view showing a pair of wall portions 53 and a plate material 54 constituting the surface 52 provided with the same in the first tray 50. 4A is a view seen from the surface 52 side, and FIG. 4B is a view seen from the back side.

  At the center in the width direction of the plate member 54, a first protrusion 54A protruding in the surface direction is formed. Since the first protrusion 54A is located at the center in the width direction of the first tray 50, at least a part of the second protrusion 16A located at the center in the width direction of the housing 10 is the first protrusion 54A in the width direction. Located at the same position. That is, the first protrusion 54A and the second protrusion 16A are located at approximately the same position in the width direction. The first protruding portion 54A protrudes from the surface 52 of the first tray 50 toward the rear side, that is, the back side. When the first tray 50 is located at the first closed position, the first protrusion 54A is not shown in FIG. 3 and the second extension 13A shown in FIG. 3 in the width direction, as shown in FIG. Although it exists, it is located between the 2nd extension part 13B located in the right side of 13 A of 2nd extension parts. The surface 52 of the first tray 50 is located between the second extending portion 13A and the second extending portion 13B in the width direction when the first tray 50 is located at the first closed position. In the present embodiment, the back surface 59 of the first tray 50 is also positioned between the second extending portion 13A and the second extending portion 13B in the width direction when the first tray 50 is positioned at the first closed position. . A pair of holes 54 </ b> B extending in the width direction are formed on the left and right sides of the plate material 54. The hole 54B has a rectangular shape extending in the left-right direction. As shown in FIG. 4 (A), each wall portion 53 is connected to a portion standing from the surface 52 in parallel with each other in the width direction and to the rear end of the wall 53A. The taper surface 53B which mutually spaces apart as it goes is provided. 54 A of 1st protrusion parts are located between a pair of wall 53A in the left-right direction, ie, the width direction. As shown in FIG. 4B, each wall portion 53 includes a through portion 53C that penetrates the hole 54B. A rack 53E is connected to the through portion 53C. Each of the pair of wall portions 53 includes a base 53F. The base 53F extends in the left-right direction and the front-rear direction. The base 53F has approximately the same height as the first protrusion 54A in the vertical direction.

  In FIG. 4B, for convenience of explanation, the cross section of the through portion 53C penetrating the hole 54B is indicated by hatching. The rack 53E connected to the right wall 53 extends in the left direction. The rack 53E connected to the left wall 53 extends in the right direction. Each rack 53E has a length that is more than half of the length from the right end of the right hole 54B to the left end of the left hole 54B. Therefore, the racks 53E face each other below the first projecting portion 54A. A gear 55 that meshes with both of the racks 53E is disposed in an opposite portion of the pair of racks 53E. The inner side of the first protrusion 54A is hollow, and a gear 55 is rotatably disposed at that portion. That is, the gear 55 is housed on the back side of the first protrusion 54A.

  For this reason, when one of the wall portions 53 is picked and moved in the left-right direction, the other wall portion 53 is moved relative to the one wall portion 53 and the center in the width direction in conjunction with the movement. It moves so as to be arranged at a symmetrical position. Further, the movement range of the wall portion 53 is a part of the first tray 50, and is regulated by the penetration portion 53C coming into contact with the left and right end portion 54BA forming the hole 54B. In the present embodiment, when the through portion 53 </ b> C abuts on the end portion 54 </ b> BA, the pair of wall portions 53 also abut on the first protrusion 54 </ b> A that is a part of the first tray 50. For this reason, even when the pair of wall portions 53 are brought closest to each other, as shown in FIG. 5, the pair of walls 53A are the second projecting portions of the separation mechanism 16 projecting rearward from the rear end surface 11A of the upper housing 11. 16A and the first protrusion 54A are disposed on both sides in the width direction. Therefore, when the first tray 50 is swung in the direction of the housing 10 and closed, the wall portion 53 does not interfere with the second projecting portion 16A of the separation mechanism 16 and the like and can be closed satisfactorily. When the pair of walls 53A are disposed at the closest approach positions as shown in FIG. 5, the distance between the pair of walls 53A substantially matches the width of the business card, that is, the length of the short side of the business card.

  Further, as shown in FIG. 5, the second tray 70 can be opened to the second open position where the surface 72 is connected to the surface 52 of the first tray 50. The third tray 80 can be opened to a third open position where the surface 82 is connected to the surface 72 of the second tray 70. Thus, by opening the first tray 50, the second tray 70, and the third tray 80, it is possible to hold a large original such as a letter size.

  FIG. 6 is an explanatory diagram illustrating an internal configuration of the image reading apparatus 1 in a state where the first tray 50, the second tray 70, and the third tray 80 are closed. As shown in FIGS. 2 and 6, the first tray 50 is entirely located between the pair of side plates 13 and is a back surface 59 that is a surface on the side separated from the first extending portion 11 </ b> B of the housing 10. Can be closed to the first closed position where it is flush with the rear end surface of the side plate 13. At that time, the wall portion 53 is positioned on both sides in the width direction of the second protrusion portion 16A and the first protrusion portion 54A of the separation mechanism 16 disposed at the center in the width direction of the image reading apparatus 1.

  For this reason, the height of the wall 53A is such that the protruding amount of the second protruding portion 16A of the separation mechanism 16 protruding from the rear end surface 11A of the upper housing 11 and the protruding amount of the first protruding portion 54A from the surface 52 of the first tray 50. It can be easily designed to be higher than the combined height. For this reason, the position in the width direction of the document can be satisfactorily matched by the wall 53A.

  Moreover, in this type of image reading apparatus, there is a lot of dead space at the rear of the casing, that is, the upstream side in the document conveyance direction, and it is easier to design the wall 53A higher. This is because when a document is held on a tray disposed behind the casing, a roller or the like is attached to the rear end of the casing in order to reduce the amount of protrusion of the tray from the casing and to reduce the size of the entire apparatus. This is because there are many cases where they are not arranged in the section.

  In the image reading apparatus 1, as shown in FIG. 6, when the first tray 50 is disposed in the first closed position, the first tray 50 is slightly inclined so that the upper side falls forward. On the other hand, the rear end surface 11A of the upper housing 11 is vertical. Therefore, in the present embodiment, the height of the wall portion 53 is configured so as to increase toward the downstream side in the document transport direction. A stiff document such as a business card may float from the first tray 50 when the downstream end in the transport direction, that is, the front end is nipped by the separation roller 15. As described above, if the height of the wall portion 53 is highest at the most downstream side in the conveyance direction, it is possible to satisfactorily suppress the document from being shifted in the width direction from between the walls 53A.

  Further, the second tray 70 can be closed to the second closed position that overlaps the first extending portion 11B of the upper housing 11 from above. Further, the third tray 80 can be closed to a third closed position that overlaps the front surface 11C of the upper housing 11 from the front. At this time, the back surfaces 73 and 83 of the second tray 70 and the third tray 80 are also flush with the outer peripheral surface of the side plate 13. For this reason, the image reading apparatus 1 can be stored extremely compactly.

  When the first tray 50, the second tray 70, and the third tray 80 are closed as described above, an opening 75 for exposing the touch panel 25 is provided at a position overlapping the touch panel 25 of the second tray 70. It has been. Therefore, even when the first tray 50, the second tray 70, and the third tray 80 are closed, the display on the touch panel 25 can be viewed and the touch panel 25 can be operated. For example, even when the first tray 50, the second tray 70, and the third tray 80 are closed, an operation of inserting a card from the insertion slot 31 and reading the image can be executed. As shown in FIG. 5, when the first tray 50, the second tray 70, and the third tray 80 are opened, the wall 53A is disposed downstream of the opening 75 in the transport direction. Therefore, the position in the width direction of the document conveyed between the pair of CIS units 21 and 22 can be satisfactorily matched.

  Further, as shown in FIG. 5, a plurality of grooves 77 along the transport direction are formed on the surface 72 of the second tray 70 in addition to the stamp 76 corresponding to the regular document width. For this reason, when the first tray 50, the second tray 70, and the third tray 80 are all disposed in the open position and the user places a document on the surfaces 52, 72, and 82, the user The groove 77 can be used as follows. That is, the user can confirm whether or not the document is inclined with respect to the conveyance direction by comparing the groove 77 with the edge in the width direction of the document. In addition, by aligning the width direction edge of the document with the groove 77, the user can place the document along the transport direction even if the document is a non-standard document. Further, as described above, since the tapered surface 53B is provided on the upstream side in the conveyance direction of the wall 53A, when the document is inserted between the pair of walls 53A from the upstream side in the conveyance direction, the document is tapered. The insertion work is facilitated by being guided by 53B.

[Other Embodiments of the Present Invention]
In addition, this invention is not limited to the said embodiment at all, It can implement with a various form in the range which does not deviate from the summary of this invention. For example, the groove 77 may be formed in the third tray 80 or the first tray 50. Further, instead of the groove 77, a straight line or a ridge may be formed on the surface of the second tray 70. However, the groove 77 has superior durability compared to printing or the ridge. can get.

  Further, the first extending portion 11B of the upper housing 11 is notched from the rear center to form a notched portion for accommodating the first tray 50, and both side portions in the width direction of the notched portion are used as the second extending portion. Good. That is, you may comprise the upper surface of the top housing | casing 11 by a 1st extension part and a pair of 2nd extension part.

  Further, the second tray 70 and the third tray 80 are not necessarily provided swingably on the first tray 50. For example, a wire frame extending backward and upward is attached to the rear end of the first tray 50. Large documents may be held. Alternatively, a large original may be held by pulling out the auxiliary tray from the first tray 50. Furthermore, the second protrusion may be another mechanism that is not related to document separation.

DESCRIPTION OF SYMBOLS 1 ... Image reading apparatus 10 ... Housing | casing 11 ... Upper housing | casing 11B ... 1st extension part 12 ... Lower housing | casing 12A ... Chute 13 ... Side plate 13A, 13B ... 2nd extension part 15 ... Separation roller 16 ... Separation mechanism 16A ... second protrusion 17 ... LF roller 18 ... discharge roller 21, 22 ... CIS unit 25 ... touch panel 50 ... first tray 52,72,82 ... surface 53 ... wall 53A ... wall 53B ... tapered surface 53E ... rack 54 ... Plate material 54A ... First protrusion 54B ... Hole 55 ... Gear 59, 73, 83 ... Back 70 ... Second tray 75 ... Opening 76 ... Stamp 77 ... Groove 80 ... Third tray

Claims (5)

A housing including a first extension portion extending in a width direction perpendicular to the document conveyance direction and a pair of second extension portions extending from the first extension portion to the upstream side in the conveyance direction; ,
A reading unit that is built in the housing and reads an image of a document;
A first open position that includes a front surface and a back surface that is located on the back side farther from the first extending portion than the front surface, is swingably provided on the housing, and is spaced from the first extending portion A first tray displaceable between a first closed position approaching the first extension part; and
A pair of walls provided upright on the surface of the first tray and positioned on both sides in the width direction and movable in the width direction between an approach position approaching each other and a separation position spaced apart from each other. A pair of walls,
A first protrusion located between the pair of walls in the width direction and protruding from the surface of the first tray;
A second projecting portion that is located at the same position as the first projecting portion in the width direction and projects from the first extending portion of the housing toward the back side;
The first tray is swingably provided at the upstream end in the transport direction, and the surface is connected to the surface of the first tray when the first tray is disposed at the first open position. Displaceable between a second open position and a second closed position that overlaps with the first extension of the housing when the first tray is disposed in the first closed position A second tray;
The first tray is disposed at the first open position, and the second tray is disposed at the second open position. Sometimes when the surface is connected to the surface of the second tray, the third open position, and when the first tray is disposed at the first closed position and the second tray is disposed at the second closed position. A third tray that can be displaced between a third closed position that is disposed on the downstream side in the transport direction of the casing,
With
A gear for interlocking the pair of walls is housed on the back side of the first protrusion,
The first protrusion and at least the surface of the first tray are located between the pair of second extending portions when the first tray is located at the first closed position,
When the pair of wall portions are located at the approach position, the pair of wall portions are in contact with a part of the first tray,
The pair of walls are positioned on both sides in the width direction of the first protrusion and the second protrusion when the pair of walls are positioned at the approach position.   The image reading apparatus according to claim 1, wherein upstream ends of the pair of walls in the transport direction include tapered surfaces that are separated from each other toward the upstream side in the transport direction.   3. The image reading apparatus according to claim 1, wherein a height of the pair of walls from the surface of the first tray is highest in a most downstream portion in the transport direction. The first tray, the second tray, one of the third tray, in at least one of the surfaces, either of the preceding claims, wherein a plurality of grooves along the conveying direction is formed whether the image reading device according to item 1. A display unit or an operation unit provided on the surface of the housing;
At least one of the first tray, the second tray, and the third tray is such that the first tray is located at the first closed position and the second tray is located at the second closed position. And an opening for exposing the display unit or the operation unit in the closed state in which the third tray is located at the third closed position,
The pair of walls are in an open state in which the first tray is located at the first open position, the second tray is located at the second open position, and the third tray is located at the third open position. The image reading apparatus according to claim 1, wherein the image reading apparatus is located downstream of the opening in the transport direction.

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