JPH0568905B2 - - Google Patents

Description

Detailed Description of the Invention - Field of Industrial Application - The present invention relates to a paper table in an information processing device, such as a document table in an image reading device or an output paper table in an X-Y plotter. It concerns the means for fixing the media sheet onto the top.

- Conventional technology and problems - When reading information on a document with an image reading device or writing image data on output paper with an X-Y plotter, it is necessary to ensure that the document or output paper does not move onto the paper tray. It needs to be fixed. Conventionally, as means for fixing the paper, a paper holding frame is used to hold the paper between the paper table and the paper holding frame.
A method is used to bring the paper into close contact with the paper table using negative pressure or static electricity. However, using a paper holding frame has the disadvantage that there is an area around the paper that cannot be read or written, and if the paper is large, the center of the paper rises. In this case, even after the reading or writing process is completed, the paper remains in close contact with the paper base, making it troublesome to remove the processed paper base, and there is a risk of damaging the paper when peeling the paper from the paper base. Ta.

Therefore, in order to solve this problem,
Publication No. 159381 discloses that when inputting and outputting data to paper, negative pressure air is supplied to a plurality of through holes provided on the paper loading surface of a paper tray to bring the paper into close contact with the paper tray, and after the input and output are completed, the holes are A technique has been proposed in which the paper is floated from the paper table by supplying positive pressure air to the holes.

-Purpose of the Invention- However, the paper that floats above the paper table due to the positive pressure air supplied to the through holes is completely released from the frictional restraint between it and the paper table, so it is not affected by a slight external force. This makes it easy to move. As a result, the floating paper may be swept away in an unintended direction by the outside air current, or the paper may escape in the opposite direction due to contact with the fingertips of the operator trying to remove the paper, making it difficult to operate when removing the paper. There was a problem that the improvement effect was small.

Therefore, an object of the present invention is to obtain a paper table with further improved operability when taking out paper by further developing the above-mentioned conventional technology.

- Means for Achieving the Object - The paper tray of the information processing apparatus of the present invention has a plurality of through holes 11, 21, 23 opened in the paper loading surface, and when inputting and outputting data to the paper, In a paper table of an information processing device, the paper is sucked by supplying negative pressure air to the through hole, and after the input/output is completed, the paper is floated by supplying positive pressure air to the through hole. A vacant chamber 12 is provided in the through hole 11,
21 and 23 are communicated with the empty chamber 12 to open on the paper loading surface of the paper tray 3, and when positive pressure is supplied to the empty chamber 12, a horizontal feeding force is applied to the paper on the sheet tray 3. Through-holes 11, 16, which generate air jets;
23 is provided.

As for the form of the through hole that applies a horizontal feeding force to the paper when positive pressure is supplied to the empty chamber 12, the through hole 1
1 is tilted toward the front of the paper tray 3, that is, toward the operator side, and a through hole 16 facing the front of the paper tray 3 is provided at the far end of the paper tray 3, and the through hole 16 is directly connected to the empty chamber 12. A mode in which it communicates with the ventilation pipe 14 via a check valve 17 that opens when pressure is supplied;
A through hole 21, which is located in front of the center of the paper tray 3 among the through holes opening in the paper loading surface, is connected to the ventilation pipe 14 through a check valve 17 that closes when positive pressure is supplied to the empty chamber 12. Examples include modes of communication.

-Embodiment- Figures 1 and 2 are diagrams showing a first embodiment of the present invention. Figure 2 is a perspective view showing an image reading device having a paper tray of the present invention, and Figure 1 is a paper tray. FIG. 3 is a diagram schematically showing a cross section of the air supply device and an air supply device.

In Figures 1 and 2, 1 is a reading unit of an image reading device, 2 is an operation panel, 3 is a paper tray,
4 shown by imaginary lines is a document, and the operation panel 2 and paper table 3 are substantially integrated. In the reading section 1, a document illumination lamp 6, a mirror 7, an imaging lens 8, and a one-dimensional image sensor 9 are mounted on a carrier 5 that runs in the longitudinal direction, and the light receiving cells of the one-dimensional image sensor 9 are electrically scanned. Main scanning by moving the carrier 5 and sub-scanning by moving the carrier 5.
The image information of the document 4 on the paper tray 3 illuminated by the document illumination lamp 6 is read using the TV scan method. During this reading, if the original 4 moves, the reading area of the original will be distorted, and the original 4
If this occurs, the focal position of the imaging lens 8 will be out of focus, and the read image will become unclear.

The operation panel 2 is provided with a document set key 10, and the paper tray 3 has a number of through holes 11...11.
are arranged in a matrix. Through hole 11...
...11 is provided in front of the paper tray 3 (on the right side of the figure), that is, inclined toward the operator side, and communicates with the empty chamber 12 provided inside the sheet tray 3, as shown in FIG. The chamber 12 is communicated with a ventilation pipe 14 connected to an electric fan 13. Reference numeral 15 denotes a motor for driving the electric fan 13. When the motor 15 rotates in the forward direction, the electric fan 13 sucks air from the empty chamber 12, and when the motor 15 rotates in the reverse direction, the electric fan 13 sends air into the empty chamber 12. Operate.

FIG. 3 is a diagram showing an operation flowchart,
The document setting and resetting operations will be explained below with reference to FIG.

The operator positions the original 4 on the paper tray 3 so that the desired reading area of the original 4 is directly below the reading section 1, and presses the original set key 10 while holding the original 4. Then, the motor 15 rotates normally, and the electric fan 13 sucks air from the empty chamber 12. As a result, negative pressure is applied to the through holes 11 . In this state, the document 4 is read, and when the reading is completed, the motor 15 is rotated in reverse. Then, the electric fan 13 sends air into the empty chamber 12 and fills the through hole 11.
... Air flows out from 11 and the document 4 on the paper table 3
surface. Since the through-holes 11...11 are provided diagonally, the air flowing out here causes the original 4 to float and gives the paper a horizontal feeding force in the direction of its inclination, that is, in the forward direction of the apparatus. is sent out towards the operator while floating. The operator then removes the document 4 from the paper table 3. The motor 15 stops after the time set by the timer in the program has elapsed, and air stops flowing out from the through holes 11 .

The document 4 is read by the above operation, and since the document 4 to be read is brought into close contact with the paper table 3 by negative pressure, the document is prevented from moving or lifting up while being read, resulting in a clear and stable image. can be read. Further, when the reading is completed, the original 4 floats up from the paper table 3 and is sent toward the operator, so that it is easy to remove the original that has been read.

FIGS. 4 and 5 show other embodiments of the invention. In the device shown in FIG. 4, a through hole 16 is provided at the rear end of the paper tray 3 and faces toward the front of the paper tray 3, and a check valve 17 that opens when air is sent into this hole 16 from an electric fan 13 is provided. It communicates with the ventilation pipe 14 through the vent pipe 14. In this structure, when air is sent into the ventilation pipe 14 by the electric fan 13 after reading is completed, the check valve 1
7 is opened, air flows out from the through holes 16, and the document 4 floated by the air flow through the through holes 11 on the sheet table is sent out toward the operator by the air flow from the through holes 16. When reading a document when negative pressure is applied to the ventilation pipe 14, the check valve 17 is closed and air is prevented from flowing through the through hole 16. The check valve 17 has a through hole 1 connected to the ventilation pipe 14.
A simple structure in which a valve body 20 made of an elastic thin plate is provided at the outlet of the valve 9 may be used.

The one shown in Fig. 5 divides the empty space formed in the paper table 3 into two, and one of the many through holes provided in the paper table 3 is provided on the front side (operator side) of the center of the paper table 3. The through holes 21...21 are connected to the empty room 22, the through holes 23...23 provided on the back side are connected to the empty room 24, and the empty room 24 is connected to the electric fan 13, and the empty room 2 is connected to the empty room 22.
4 and 22 are communicated through a check valve 17 that closes when positive pressure is applied to the empty chamber 24. In this structure, the electric fan 13 is used to
When air is sucked into the empty chamber 24, the check valve 17 opens and negative pressure is applied to all the through holes 23, 21, . The valve 17 is closed and air flows out only from the through holes 23...23 on the back side, and the original 4 floats in an inclined state as shown in the figure and slides toward the operator.

In the above embodiment, a fan whose blowing direction is reversed by reversing the direction of the motor 1, that is, an axial flow fan is used, but as shown in FIG. In this case, the switching valve 26 may be used to switch between suction and delivery of the air in the empty chambers 12 and 24.

−Effects of the Invention− By using the paper tray configured as described above, it is possible to securely fix the paper when inputting and outputting information to the original, output paper, or other paper, and it is possible to input and output information using air pressure. In a device that peels the paper from the paper table after output, it is possible to prevent the peeled paper from moving around unnecessarily, and the paper is automatically sent to the operator after input/output is completed. This has the effect of making it easier and faster to take out the paper. Particularly when inputting and outputting a large number of sheets of paper, it is possible to set and reset documents on the paper tray extremely smoothly and quickly, reducing the operator's workload and greatly improving work efficiency. There is.

[Brief explanation of the drawing]

1 to 3 are diagrams showing a first embodiment of the present invention, FIG. 1 is a diagram schematically showing a cross section of a paper tray and an air supply source, and FIG. 2 is a diagram showing a paper tray of the present invention. FIG. 3 is a perspective view of the image reading device provided with the apparatus, and FIG. 3 is an operation flowchart. FIG. 4 is a sectional view schematically showing a second embodiment of the present invention, and FIG. 5 is a sectional view schematically showing a third embodiment. FIG. 6 is an explanatory diagram showing another embodiment of the air supply source. In the figure, 3...Paper table, 4...Document, 11...Through hole, 12...Empty room, 13...Electric fan, 14...
...Vent pipe, 15...Motor, 16...Through hole,
17...Check valve, 21...Through hole, 22...Vacancy, 23...Through hole, 24...Vacancy, 25...Centrifugal fan, 26...Switching valve.

Claims (1)

[Claims] 1. A plurality of through holes 11, 21, 23 communicating with a ventilation pipe 14 are arranged on the paper mounting surface of the paper tray 3 on which paper serving as a recording medium for input/output data is set. , an air supply source 13, 25 that supplies negative pressure to the ventilation pipe during data input/output to paper, and supplies positive pressure to the ventilation pipe after input/output is completed;
26, the paper tray 3 is provided with an empty chamber 12 inside, and the through holes 11, 21, and 23 communicate with the empty chamber 12 so that the sheets of the paper tray 3 are Through-holes 11, 16, and 23 are provided that are open to the placement surface and that generate air jets that apply a horizontal feeding force to the paper on the paper table 3 when positive pressure is supplied to the empty chamber 12. A paper tray for information processing equipment that is characterized by: 2 By drilling the through hole 11 that communicates with the empty chamber 12 and opens on the paper loading surface of the paper table 3 at an angle toward the front of the paper table 3, a horizontal feeding force can be applied to the paper on the paper table 3. A paper table according to claim 1, which provides a paper table according to claim 1. 3. By providing a through hole 16 facing the front of the paper table 3 at the rear end of the paper table 3, and communicating the through hole 16 with the ventilation pipe 14 via a check valve 17 that is opened by the positive pressure, The paper table according to claim 1, which applies a component force in the horizontal direction to the paper on the paper table 3. 4. A check valve 17 that closes a through hole 21 located forward of the center of the paper table 3 among the through holes communicating with the empty chamber 12 and opening on the paper loading surface of the paper table 3 by the positive pressure. through the ventilation pipe 14
The paper table according to claim 1, which applies a horizontal component force to the paper on the paper table 3 by communicating with the paper table 3.