JP3178699U - Auto document feeder - Google Patents

Abstract

An auto document feeder is provided.
An auto document feeder of the present invention mounted on a flatbed scanner includes a paper feed mechanism and a paper guide mechanism installed in an upper lid. The paper feed mechanism is constituted by a plurality of guide walls and feed wheels, and the guide walls divide a paper feed path for feeding paper, and the paper pushed out by the feed wheel advances along the paper feed path. The paper guide mechanism is installed on the upper surface of the flatbed scanner and includes a movable guide plate and an operation control device. The movable guide plate is movably attached to the upper surface of the flatbed scanner, moved along a predetermined path, the movable guide plate and the motion control device are connected, and the upper lid and the flatbed scanner are closed. Move the interlocking movable guide plate upward.
[Selection] Figure 5

Description

  The present invention relates to an auto document feeder, and relates to a paper guide mechanism in the auto document feeder.

  In order to improve convenience in use, a flat scanner is installed on a general copier, and an auto document feeder is further provided on the upper lid of the flat scanner, and continuous scanning and double-sided scanning are performed by the auto document feeder (ADF). Operation such as scanning is achieved.

  The structure of a known auto document feeder 10 is as shown in FIGS. 1 and 2, and includes a paper feed mechanism 30 attached to the upper lid 12 and a paper guide mechanism installed on the flat table scanner 11. The paper feed mechanism 30 is provided with a plurality of guide walls 31 and feed wheels 32, and a single paper feed path 33 is divided by the guide walls 31. The paper is moved along the paper feed path 33 by the movement of the feed wheel 32 and sent to the scan area 13 on the flatbed scanner 11 for scanning. The paper guide mechanism is installed behind the scan area 13, the paper guide mechanism is a fixed guide plate, and the height of the rear end of the guide plate 14 is higher than the guide wall 31. After the sheet passes through the scan area 13 in this state, the sheet returns smoothly into the sheet feed path 33 without being blocked by the guide wall 31.

  As shown in FIG. 3, since the paper feeding mechanism 30 is installed in the upper lid 12, scanning is performed when the user's lid is not properly closed or the gap for attaching the paper feeding mechanism 30 is too large. In some cases, subsequent sheets cannot be smoothly returned into the paper feed path 33. FIG. 3 is a diagram showing an abnormality occurrence state. Since the rear end of the guide plate 14 is lower than the guide wall 31, the paper that has passed through the scan area 13 is caught on the guide wall 31, and the paper is damaged or jammed.

  In view of the above disadvantages, there is room for improvement in the conventional auto document feeder.

  An object of the present invention is to provide an auto document feeder that can be automatically adjusted, maintains a proper gap between a guide wall and a paper guide mechanism, and can prevent paper breakage and paper jamming in a paper feeding process.

  In order to achieve the above object, an auto document feeder of the present invention includes a paper guide mechanism installed on a flatbed scanner and a paper feed mechanism installed on an upper lid.

  The paper guide mechanism includes a movable guide plate and an operation control device. The movable guide plate is attached to the upper surface of the flatbed scanner in a movable state, and moves along a predetermined path to adjust the gap between the guide walls. The motion control device and the movable guide plate are connected to each other and move the movable guide plate that is interlocked.

  In an embodiment of the present invention, the movable guide plate can be hinged to the upper surface of the flatbed scanner in a movable state and can be moved along a circular path having a constant angle. When the movable guide plate moves, the height of the rear end of the movable guide plate also changes accordingly, and an appropriate distance is secured between the movable guide plate and the guide wall. In the embodiment, when the operation control device is a magnet member, the magnet member is attached to the upper lid, and when the upper lid is closed downward, the movable guide plate installed on the flatbed scanner to be sucked rotates upward.

  In addition, a long groove for accommodating the movable guide plate is further provided on the upper surface portion of the flatbed scanner, and the movable guide plate is hinged in the long groove so that the movable guide plate is driven by the motion control device. When not receiving, it is stored in the long groove.

  A feature of the present invention is that a paper guide mechanism is provided at an upper surface portion of the flatbed scanner, and the paper guide mechanism includes a movable guide plate and an operation control device. The movable guide plate is movably connected to the upper surface of the flatbed scanner and reciprocates along a predetermined path. When the operation control device and the movable guide plate are connected to each other and the upper lid of the flat table scanner is closed, the interlocking movable guide plate moves upward, and an appropriate distance is provided between the movable guide plate and the guide wall on the paper feed path. Therefore, the occurrence of a paper jam can be prevented.

  The automatic document feeder according to the present invention can be automatically adjusted, and has an effect of holding a proper gap between the guide wall and the paper guide mechanism to prevent paper breakage and paper jamming in the paper feeding process.

It is sectional drawing of a well-known auto document feeder. It is a three-dimensional view of a known auto document feeder. It is a figure which shows the state which the paper jam generate | occur | produced in the well-known auto document feeder. It is a three-dimensional view of the present invention auto document feeder. It is sectional drawing of this invention auto document feeder. It is a figure which shows the state which closed the upper cover and lifted the movable guide plate. It is a figure which shows the state which lifted the upper cover and lowered the movable guide plate.

  In order to understand the technical contents, structural features, objects to be achieved, and effects of the present invention, a detailed description will be given by way of an embodiment combined with drawings.

  As shown in FIGS. 4 and 5, the auto document feeder 10 of the present invention includes a paper guide mechanism 20 and a paper feed mechanism 30 installed in the upper lid 12. The paper feed mechanism 30 includes a plurality of guide walls 31 and a feed ring 32, and the guide wall 31 divides a paper feed path 33 for feeding paper, and the paper pushed out by the feed ring 32 enters the paper feed path 33. Move forward along. Further, a position limiting member 24 for limiting the position of the paper guide mechanism 20 is provided on the guide wall 31.

  In the embodiment shown in the drawings of the present invention, the paper guide mechanism 20 includes a long groove 23, a movable guide plate 21, and an operation control device 22. The long groove 23 is installed at a location adjacent to the upper surface of the flatbed scanner 11 and the rear end of the scan area 13. The movable guide plate 21 is pivotally mounted in the elongated groove 23 in a movable state, and the movable guide plate 21 rotates around one end. The position limiting member 24 installed on the left and right protrusions of the guide wall 31 controls the height of the rear end of the movable guide plate 21, which is sufficient for passing the sheet between the movable guide plate 21 and the guide wall 31. Hold the gap. Further, the operation control device 22 and the movable guide plate 21 are connected to each other, and the movable guide plate 21 interlocked when the upper lid 12 and the flatbed scanner 11 are closed is rotated upward.

  In the embodiment of the present invention, the motion control device 22 is a magnet member 221 attached to the upper lid 12. When the upper lid 12 and the flat table scanner 11 are closed, the movable guide plate 21 is attracted by the magnetic force of the magnet member 221 and rotates upward from below. At this time, the position limiting member 24 on the guide wall 31 and the movable guide plate 21 are in close contact with each other, and a sufficient gap is secured between the movable guide plate 21 and the guide wall 31 for passage of paper. When the user opens the upper lid 12, the movable guide plate 21 loses the suction of the magnet member 221, falls downward, and returns into the elongated groove 23.

  As shown in FIG. 6, the steps for the user to perform automatic paper feeding using the auto document feeder 10 of the present invention are as follows. First, the user closes the upper lid 12 and the flat table scanner 11 and aligns the auto document feeder 10 with the scan area 13 on the flat table scanner 11 without a gap. Subsequently, the paper is placed on the paper tray of the auto document feeder 10. By the movement of the feed wheel 32, the sheets placed in the sheet receiver are fed one by one, pass through the guide path, and sent to the scan area 13 for scanning.

  At this time, the movable guide plate 21 receives the magnetic force of the magnet member 221 and rotates upward, and protrudes above the flatbed scanner 11 to form a slope. As a result, the fed paper returns into the paper feed path 33. Since the height of the rear end of the movable guide plate 21 is slightly higher than the guide wall 31, the sheet that has passed through the scan area 13 returns to the guide path under the guidance of the movable guide plate 21 and is blocked by the guide wall 31. There is no.

  As shown in FIG. 7, when the user finishes scanning and opens the upper lid 12, the movable guide plate 21 and the magnet member 221 are separated. The movable guide plate 21 that has lost the driving force rotating upward falls and returns to the long groove 23, and the upper surface of the flatbed scanner 11 becomes a completely flat surface again.

  As described above, the difference between the present invention and the known technique is that the paper guide mechanism 20 is provided on the upper surface of the flat table scanner 11, and the paper guide mechanism 20 includes the movable guide plate 21 and the operation control device 22. The movable guide plate 21 is connected to the upper surface of the flat table scanner 11 in a movable state, and reciprocates along a predetermined path. The operation control device 22 and the movable guide plate 21 are connected to each other, and when the upper lid 12 of the flat table scanner 11 is closed, the interlocking movable guide plate 21 is moved upward so that the movable guide plate 21 and the sheet feed path 33 are moved. Since an appropriate distance is secured in the guide wall 31, the occurrence of a paper jam can be prevented.

DESCRIPTION OF SYMBOLS 10 Auto document feeder 11 Flatbed scanner 12 Top cover 13 Scan area 14 Guide plate 20 Paper guide mechanism 21 Movable guide plate 22 Operation control device 221 Magnet member 23 Long groove 24 Position limiting member 30 Paper feed mechanism 31 Guide wall 32 Feed wheel 33 Paper feed path

Claims (4)

The auto document feeder mounted on the flatbed scanner includes a paper feed mechanism installed in the upper lid and a paper guide mechanism installed on the upper surface of the flatbed scanner.
The paper feeding mechanism is constituted by a plurality of guide walls and a feed wheel, the guide wall divides a paper feeding path for feeding paper, and the paper pushed out by the feed wheel advances along the paper feeding path,
The paper guide mechanism includes a movable guide plate and an operation control device,
The movable guide plate is movably attached to the upper surface of the flatbed scanner, moved along a predetermined path, the movable guide plate and the motion control device are connected, and the upper lid and the flatbed scanner are closed.
An auto document feeder characterized by moving an interlocking movable guide plate upward.   2. The auto document according to claim 1, wherein a position limiting member for limiting the position of the paper guide mechanism is provided on the guide wall, and the position limiting member is installed on the left and right protrusions of the guide wall. feeder.   2. The sheet guide mechanism according to claim 1, wherein a long groove is provided on the upper surface of the flat scanner, and the movable guide plate is pivotally mounted in the long groove. Auto document feeder as described.   2. The automatic document feeder according to claim 1, wherein the operation control device is set as a magnet member, the magnet member is mounted in an upper lid, and the movable guide plate is attracted by a magnetic force.

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