JP5082501B2 - Image reading device - Google Patents

Description

  The present invention relates to an image reading apparatus that reads image information of a document.

  In a conventional image reading apparatus, a document holding cover attached to the document table so as to be openable and closable, a document tray provided on the upper surface of the document pressing cover, and provided on the upper surface of the document pressing cover and set on the document tray. There is an automatic document feeder (ADF) that conveys the original document to an arbitrary reading site, and a paper discharge tray that is formed on the upper surface of the document pressing cover and discharges the original document that has been conveyed to the reading site.

Here, a jam release dial is provided inside the automatic document feeder to rotate the conveyance roller and the like when the document is jammed. When a document is jammed inside the automatic document feeder, the user can easily take out the jammed document from the automatic document feeder by rotating the jam release dial.
JP 2005-266431 A JP-A-7-61639

  By the way, when the document is jammed inside the automatic document feeder, a part of the document is exposed on the lower surface side of the document pressing cover, so that the user opens the document pressing cover and opens the document pressing cover. While turning the jam release dial on the upper surface side, the document was removed from the lower surface side of the document pressing cover. In other words, when the document is jammed, the user needs to simultaneously perform the rotation operation of the jam release dial on the upper surface side of the document pressing cover and the extraction operation of the document on the lower surface side of the document pressing cover from both the upper and lower sides of the document pressing cover. For this reason, it has become very difficult to remove the jam.

  On the other hand, in order to facilitate the jam clearing operation, a configuration in which a jam clear dial is separately provided on the lower surface side of the document pressing cover is also conceivable. There are increasing problems.

  Therefore, in consideration of the above circumstances, the present invention can perform image reading that can easily remove (jam removal) a jammed document while suppressing an increase in manufacturing cost even when the document is jammed by an automatic document feeder. An object is to provide an apparatus.

According to the first aspect of the present invention, there is provided a document table, a document pressing cover that can be opened and closed with respect to the document table and presses a document placed on the document table on a lower surface side, and an upper surface side of the document pressing cover A document tray on which the document is placed, and an automatic document feeder that transports the document placed on the document tray to an arbitrary reading site on the document table, provided on the upper surface side of the document pressing cover. An jam reading member that removes a document jammed inside the automatic document feeder from the automatic document feeder, and the automatic document feeder has a document conveyance roller for conveying the document. The jam release member is a disc-shaped member that is provided so as to be rotatable and rotates to rotate the document transport roller to remove the document, and a part of the disc-shaped member is a front part. At the same time operably exposed on the upper surface of the document pressing cover, characterized in that the other part of the disc-shaped member is also operably exposed on the lower surface of the document pressing cover.

According to a second aspect of the present invention, there is provided a document table, a document pressing cover that is provided so as to be openable and closable with respect to the document table, and presses a document placed on the document table on the lower surface side, and an upper surface side of the document pressing cover A document tray on which the document is placed, and an automatic document feeder that transports the document placed on the document tray to an arbitrary reading site on the document table, provided on the upper surface side of the document pressing cover. An image reading apparatus having a jam release member for removing a document jammed in the automatic document feeder from the automatic document feeder, wherein the automatic document feeder is a document conveyance roller for conveying the document an automatic document feeder body with a, has an upper surface cover portion that can be opened and closed with respect to the automatic document feeder body, the jam releasing member is rotatably provided control rotational operation And a locking member formed on an outer peripheral surface of the disk-shaped member, and the locking portion of the jam release member is a predetermined member. The length is set to protrude from the upper surface of the automatic document feeder main body, and the locking portion is set to protrude from the lower surface of the document pressing cover by a predetermined length . wherein are rotary shaft mechanically linked document feeding roller, the jam clearing member, together with the locking portion is exposed to be operated when opening the front SL top cover part, closing the top cover portion The locking portion is provided so as to be hidden by the upper surface cover portion, and at the same time, the locking portion is exposed to be operable on the lower surface side of the document pressing cover.

According to the present invention, the document placed on the document tray is conveyed to an arbitrary reading portion on the document table by the automatic document feeder, but at this time, a predetermined malfunction (for example, the document is bent, etc.) ) May cause the document to jam inside the automatic document feeder (occurrence of a jam).

  If a jam occurs when a part of the document is exposed on the lower surface side of the document pressing cover, the document pressing cover is opened and the jam release member is operated from the lower surface side of the document pressing cover. The jammed original can be removed by grasping and pulling out a part of the original. In particular, since two operations can be performed from the lower surface side of the document pressing cover, the document removal operation is facilitated.

  If a jam occurs when a part of the document is exposed on the upper surface side of the document pressing cover, the document pressing cover is closed and the jam release member is operated from the upper surface side of the document pressing cover. By grasping and pulling out a part of the original, the jammed original can be removed. In particular, since two operations can be performed from the upper surface side of the document pressing cover, the document removal operation is facilitated.

  As described above, according to the present invention, since one jam release member can be approached from both the upper and lower sides of the document pressing cover, the working efficiency of the jam release operation can be increased. In addition, compared to a configuration in which a plurality of jam release members are provided, an increase in the number of parts and the number of assembling steps can be prevented, and as a result, a significant increase in manufacturing cost can be suppressed.

Further , the document placed on the document tray is conveyed to an arbitrary reading portion on the document table by the automatic document feeder, but at this time, due to a predetermined defect (for example, the document is bent), the document May jam inside the automatic document feeder (jamming).

  If a jam occurs when a part of the document is exposed on the lower surface side of the document pressing cover, the document pressing cover is opened and the jam release member is operated from the lower surface side of the document pressing cover. The jammed original can be removed by grasping and pulling out a part of the original. In particular, since two operations can be performed from the lower surface side of the document pressing cover, the document removal operation is facilitated.

  If a jam occurs when a part of the document is exposed on the upper surface of the document holding cover, the document holding cover is closed and the upper cover of the automatic document feeder is opened. By operating the jam release member from the upper surface side of the cover and simultaneously holding and pulling out a part of the original, the jammed original can be removed. In particular, since two operations can be performed from the upper surface side of the document pressing cover, the document removal operation is facilitated.

  As described above, according to the present invention, since one jam release member can be approached from both the upper and lower sides of the document pressing cover, the working efficiency of the jam release operation can be increased. In addition, compared to a configuration in which a plurality of jam release members are provided, an increase in the number of parts and the number of assembling steps can be prevented, and as a result, a significant increase in manufacturing cost can be suppressed.

  Furthermore, in a normal use state where no jam occurs, the top cover of the automatic document feeder is closed, so the jam release member is hidden by the top cover and is not exposed to the outside. It is impossible to visually recognize the jam release member. As a result, it is possible to prevent the jam release member from being damaged due to, for example, an unexpected collision of a surrounding object with the jam release member during normal use where no jam has occurred, and the design of the image reading apparatus. Can be improved.

Further , according to the present invention, the jam release member is a disk-like member provided so as to be rotatable. When the jam release member is rotated by the user, the original is removed by rotating the original conveying roller. As a result, the user can easily release the jam simply by rotating the jam release member.

Further, according to the present invention, since the engaging portion is formed on the outer peripheral surface of the jam release member, the rotation operation of the jam release member can be easily performed. In particular, due to restrictions on the positional relationship with the document table, etc., a latching portion is formed on the outer peripheral surface of the jam release member even in a configuration in which the jam release member can project only a small amount from the lower surface side of the document holding cover. By doing so, the rotation operation of the jam release member can be easily performed.

  Next, an image reading apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the image reading apparatus 10 includes an image reading apparatus main body 12 that reads information on a document. A document table 14 on which a document is placed is provided on the upper part of the image reading apparatus main body 12. An information reading portion (not shown) for reading image information of the document is formed at a predetermined portion of the document table 14. An operation unit 16 having a key for starting a document reading operation is provided on a side surface of the document table 14.

  Further, the document table 14 is opened and closed with respect to the document placement surface of the document table 14, and a document pressing cover 18 that presses the document placed on the document placement surface on the lower surface side is a hinge member 42 (see FIG. 4). Is attached through. Further, a paper feed tray (document tray) 20 on which documents are placed is provided on the upper surface side of the document pressing cover 18. On the upper surface side of the document pressing cover 18, an automatic document conveying device 22 that conveys the document placed on the paper feed tray 20 to the information reading portion is provided. A paper discharge tray 24 is provided on the upper surface side of the document pressing cover 18 and below the paper feed tray 20 to discharge the document conveyed to the information reading portion.

  As shown in FIG. 2, an automatic document feeder main body 28 having a document conveyance roller 26 for conveying a document is provided inside the automatic document feeder 22. On the upper surface of the automatic document feeder main body 28, a document passage surface 30 through which the document on the paper feed tray 20 passes is formed. The automatic document feeder 22 includes a top cover member (upper surface cover portion) 32 that constitutes a part of the casing of the automatic document feeder 22 and covers the document conveyance roller 26 and the document passage surface 30. The main body 28 can be opened and closed. When the upper cover member 32 is opened, the original passage surface 30 and the original conveying roller 26 are exposed to the outside.

  Further, when the upper surface cover member 32 is closed, the original passage surface 30 and the original conveying roller 26 are hidden under the upper surface cover member 32 and cannot be visually recognized from the outside. This prevents the jam release handle 34 from being damaged due to, for example, an unexpected collision of a surrounding article or tool with the jam release handle (jam release member) 34 during normal use when no jam has occurred. While being able to prevent, the design property of the image reading apparatus 10 can be improved.

  Here, as shown in FIG. 3, in the vicinity of the document path surface 30 of the automatic document feeder main body 28, when the document is jammed inside the automatic document feeder 22, the document is fed from the inside of the automatic document feeder 22. A jam release handle 34 is provided for removal. The jam release handle 34 includes a disc-shaped handle main body 36 that is rotatably attached to the automatic document feeder main body 28, and a locking portion 38 that is formed to protrude from the outer periphery of the handle main body 36. Yes. The jam release handle 34 is mechanically coupled (connected) to the rotation shaft of the document conveyance roller 26 so that the document conveyance roller 26 can be easily rotated by rotating the jam release handle 34. It has become. The jam release handle 34 is formed as a disk-like member as a whole, and the outer diameter thereof is set so large that the locking portion 38 protrudes from both the upper surface side and the lower surface side of the document pressing cover 18. .

  In addition, as shown in FIG. 2, when the upper surface cover member 32 is opened with respect to the automatic document feeder main body 28, a part of the jam release handle 34 is operably exposed on the upper surface side of the document pressing cover 18. It is configured as follows. Specifically, the locking portion 38 of the jam release handle 34 is set so as to protrude from the upper surface of the automatic document feeder main body 28 by a predetermined length. Thus, the user easily rotates the jam release handle 34 by pressing the locking portion 38 of the jam release handle 34 in a state where the upper surface cover member 32 is opened with respect to the automatic document feeder main body 28. be able to. As shown in FIG. 1, when the upper surface cover member 32 is closed with respect to the automatic document feeder main body 28, the jam release handle 34 is hidden under the upper surface cover member 32 and is visually recognized from the outside. Can not do.

  As shown in FIG. 4, a through hole 40 is formed on the lower surface side of the document pressing cover 18, and a part of the jam release handle 34 is operated from the lower surface side of the document pressing cover 18 through the through hole 40. It is configured to be exposed as possible. Specifically, the locking portion 38 of the jam release handle 34 is set so as to protrude by a predetermined length. Thus, the user can easily rotate the jam release handle 34 by pressing the locking portion 38 of the jam release handle 34 in a state where the document pressing cover 18 is opened with respect to the document table 14. . The jam release handle 34 is provided so that the center thereof is located at the center of the automatic document feeder main body 28 in the thickness direction. The latch portion 38 of the jam release handle 34 is provided on the lower surface side of the document pressing cover 18. The length of the protrusion is limited to a predetermined length or less because it is limited by the positional relationship with the placement surface of the document table 14 when the document pressing cover 18 is closed with respect to the document table 14.

  Next, the operation of the image reading apparatus of this embodiment will be described.

  As shown in FIG. 1, the document placed on the paper feed tray 20 is transported to an arbitrary reading site on the document table 14 by the automatic document transport device 22, but at this time, a predetermined malfunction (for example, the document The document may be jammed inside the automatic document feeder 22 (jamming).

  If a jam occurs when a part of the document is exposed on the lower surface side of the document pressing cover 18, the document pressing cover 18 is opened with respect to the document table 14 as shown in FIG. By rotating the jam release handle 34 from the lower surface side of the document pressing cover 18 and simultaneously holding a part of the document and pulling it out to the lower surface side of the document pressing cover 18, the jammed document can be removed. At this time, when the jam release handle 34 is rotated, the document transport roller 26 is rotated to remove the document. Therefore, the user can easily release the jam simply by rotating the jam release handle 34. can do. Further, two operations and operations are simultaneously performed: a rotation operation of the jam release handle 34 from the lower surface side of the document pressing cover 18 and an operation of gripping a part of the document and pulling it out to the lower surface side of the document pressing cover 18. This makes it easy to remove the original.

  On the other hand, when a jam occurs when a part of the document is exposed on the upper surface side of the document pressing cover 18, the document pressing cover 18 is closed and the upper cover member 32 is moved to the document as shown in FIG. Opening the automatic conveyance device main body 28, operating the jam release handle 34 from the upper surface side of the document pressing cover 18, and simultaneously grasping a part of the document and pulling it out to the upper surface side of the document pressing cover 18, thereby jamming the document. Can be removed. In particular, the two operations of rotating the jam release handle 34 from the upper surface side of the document pressing cover 18 and gripping a part of the document and pulling it out to the upper surface side of the document pressing cover 18 can be performed simultaneously. Therefore, the document removal operation is facilitated.

  As described above, according to the present invention, one jam release handle 34 can be approached from both the upper and lower sides of the document pressing cover 18, so that the work efficiency of the jam release operation can be increased. In addition, as compared with a configuration in which a plurality of jam release handles 34 are provided, it is possible to prevent an increase in the number of parts and the number of assembling steps, thereby suppressing a significant increase in manufacturing cost.

  In particular, as shown in FIG. 4, when the jam release handle 34 is rotated from the lower surface side of the document pressing cover 18, the jam release handle 34 is not attached to the document pressing cover 18 due to restrictions on the positional relationship with the document table 14. Even in a configuration in which only a small amount can be protruded from the lower surface side, the jam release handle 34 can be easily rotated by forming the engaging portion 38 on the outer peripheral surface of the jam release handle 34.

1 is a perspective view of an image reading apparatus according to an embodiment of the present invention. 1 is a perspective view of a state in which an upper surface cover portion of an automatic document feeder that constitutes an image reading apparatus according to an embodiment of the present invention is opened. FIG. FIG. 4 is a perspective view of a jam release member provided in an automatic document feeder that constitutes an image reading apparatus according to an embodiment of the present invention. FIG. 3 is a perspective view of the document pressing cover constituting the image reading apparatus according to the embodiment of the present invention as viewed from the lower surface side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image reading apparatus 14 Original stand 18 Original holding cover 20 Paper feed tray (original tray)
22 Automatic Document Conveying Device 26 Document Conveying Roller 32 Top Cover Member (Upper Cover Part)
34 Jam release handle (Jam release member)
38 Locking part

Claims (2)

A document table, a document pressing cover that is openable and closable with respect to the document table and presses a document placed on the document table on the lower surface side, and a document that is provided on the upper surface side of the document pressing cover is placed on the document table. A document tray, an automatic document feeder that is provided on the upper surface side of the document pressing cover and transports a document placed on the document tray to an arbitrary reading portion on the document table, and an inside of the automatic document feeder An image reading apparatus having a jam release member for removing a jammed document from the automatic document feeder,
The automatic document feeder has a document transport roller for transporting a document,
The jam release member is a disk-shaped member that is provided so as to be rotatable and rotates to rotate the document conveying roller to remove the document, and a part of the disk-shaped member is on the upper surface side of the document pressing cover. The image reading apparatus is characterized in that the other part of the disk-like member is also operably exposed on the lower surface side of the document pressing cover. A document table, a document pressing cover that is openable and closable with respect to the document table and presses a document placed on the document table on the lower surface side, and a document that is provided on the upper surface side of the document pressing cover is placed on the document table. A document tray, an automatic document feeder that is provided on the upper surface side of the document pressing cover and transports a document placed on the document tray to an arbitrary reading portion on the document table, and an inside of the automatic document feeder An image reading apparatus having a jam release member for removing a jammed document from the automatic document feeder,
The automatic document feeder includes an automatic document feeder main body provided with a document conveyance roller for conveying a document, and an upper surface cover portion that can be opened and closed with respect to the automatic document feeder main body .
The jam release member is provided so as to be rotatable and is rotated so that the original conveying roller is rotated to remove the original, and a locking portion formed on the outer peripheral surface of the disc-like member, Have
The locking portion of the jam release member is set to protrude from the upper surface of the automatic document feeder main body by a predetermined length, and the locking portion protrudes from the lower surface of the document pressing cover by a predetermined length. Set to
The jam release member is mechanically coupled to a rotation shaft of the document conveying roller,
The jam clearing member, together with the engaging portion when opened front SL top cover unit is exposed to be operated, so that the locking portion when closing the top cover part is hidden by the top cover portion At the same time, the image reading apparatus is characterized in that the engaging portion is exposed to be operable on the lower surface side of the document pressing cover.

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