JP2020083484A - Sheet suction device - Google Patents

Abstract

To provide a sheet suction device capable of suctioning sheet with no defect over a surface of the sheet even when the sheet originally has bending or curling.SOLUTION: A sheet suction device composed of dielectric is provided with: a charge member 11 arranged to cover a loading surface where sheets are loaded; a plurality of individual electrode patterns 12a to 12d aligned in an inner side or a lower surface side of the charge member 11 from a center part toward a peripheral edge part of the loading surface; and an electric supplying part (a power supply 13, a switch 14, a control part 17) sequentially supplying electric charge from the individual electrode pattern 12a positioned at the center part to the individual electrode pattern 12d positioned at the peripheral edge part.SELECTED DRAWING: Figure 2

Description

The present invention relates to a sheet suction device that sucks a sheet such as a recording medium on which an image is formed and output from an image forming apparatus such as a printer, a copying machine, and an MFP (Multifunction Peripheral/Printer/Product).

A technique has been proposed that reliably prevents inadvertent misalignment of a document placed on a transparent plate (see, for example, Patent Document 1). In Patent Document 1, a linear electrode pattern having positive and negative charges is formed on the upper surface of a transparent plate, and a document on the transparent plate is attracted by an action of electrostatic induction.

JP, 2005-70588, A

However, when the sheet originally bends or curls, in the conventional technique, the first electrode pattern and the second electrode pattern are evenly wired over the entire surface, so that the edge portion of the sheet is absorbed first. However, there is a problem that wrinkles and uplift occur, and the entire surface cannot be adsorbed cleanly.

The present invention has been made in view of the above problems, and an object thereof is to provide a sheet suction device that can cleanly suck the entire surface of a sheet even if the sheet originally has a bend or a curl. With the goal.

The sheet suction device of the present invention is composed of a dielectric material, and is provided with a charging member provided so as to cover a mounting surface on which a sheet is mounted, and the center of the mounting surface inside or on the lower surface side of the charging member. A plurality of electrode patterns arranged from the peripheral portion toward the peripheral portion, and a charge supply portion that sequentially supplies electric charges from the electrode pattern located in the central portion toward the electrode pattern located in the peripheral portion. Is characterized by.

According to the present invention, even if the sheet originally has a bend or a curl, electrostatic attraction can be sequentially performed from the central portion, so that the entire surface of the sheet can be attracted neatly.

It is a system configuration diagram showing a configuration of an inspection system including an embodiment of a sheet suction device according to the present invention. It is a block diagram which shows the structure of the sheet suction device shown in FIG. 3 is a flowchart illustrating a suction operation of the sheet suction device shown in FIG. 1. It is explanatory drawing explaining the adsorption|suction operation|movement of the sheet|seat adsorption|suction apparatus shown in FIG. It is explanatory drawing explaining the adsorption|suction operation|movement of the sheet|seat adsorption|suction apparatus shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in the following embodiments, the same reference numerals are given to the configurations having the same functions.

The present embodiment is an inspection system that photographs and inspects a sheet such as a recording medium on which an image is formed and output from an image forming apparatus such as a printer, a copying machine, and an MFP (Multifunction Peripheral / Printer / Product). Referring to FIG. 1, the inspection system includes a sheet suction device 1 that sucks and mounts a sheet, a camera 2 that captures a photograph image of the sheet mounted on the sheet suction device 1, and a camera 2. The image processing apparatus 3 is provided for inspecting the state of the sheet (image forming state) and outputting the inspection result by analyzing the acquired photographic image.

The image processing device 3 is an information processing device such as a personal computer. The image processing device 3 inspects the position and inclination of the image formed on the recording medium.

Referring to FIG. 2, the sheet suction device 1 includes a charging member 11, an electrode pattern 12, a power supply 13, a switch 14, a sheet detection sensor 15, a fan 16, and a control unit 17.

The charging member 11 is a plate-shaped or film-shaped member that is formed of a dielectric that does not conduct electricity to a DC voltage and is provided so as to cover the mounting surface on which the sheet is mounted. The charging member 11 is made of, for example, a resin such as acrylic.

The electrode pattern 12 is arranged inside or on the lower surface side of the charging member 11. The electrode pattern 12 is divided into a plurality of individual electrode patterns 12a to 12d which are not in contact with each other. As shown in FIG. 1, the plurality of individual electrode patterns 12a to 12d are directed from the central portion of the mounting surface toward the peripheral portion. It is arranged. In the present embodiment, the electrode pattern 12 is arranged in the central portion of the individual electrode pattern 12a, the individual electrode pattern 12b arranged to surround the individual electrode pattern 12a, and the individual electrode pattern 12b. The individual electrode pattern 12c and the individual electrode pattern 12d arranged so as to surround the individual electrode pattern 12c.

The power supply 13 functions as a charge supply unit that supplies charges to the electrode pattern 12. When electric charges are supplied to the electrode pattern 12 from the power source 13, the static electricity generated on the charging member 11 electrostatically adsorbs the sheet placed on the placing surface.

The switch 14 is a switching unit that switches the connection destination of the electrode pattern 12 to either the negative terminal or the ground terminal of the power supply 13. The switch 14 includes individual switches SWa to SWd corresponding to the individual electrode patterns 12a to 12d, respectively.

The sheet detection sensor 15 is a sheet detection unit that detects the sheet placed on the placement surface by the user. The sheet detection sensor 15 can be configured by a reflection type optical sensor, a micro switch, or the like.

The fan 16 is a blower. The fan 16 is arranged inside the housing, and blows air toward the back surface of the sheet placed on the placement surface through the ventilation port 18 formed in the charging member 11. The ventilation port 18 is arranged so as to face the peripheral edge of the placed sheet so that the peripheral edge of the placed sheet is turned up by the air blown from the fan 16. An opening is also formed on the mounting surface facing the ventilation port 18, and the electrode pattern 12 is also arranged so as to avoid the ventilation port 18.

The control unit 17 is an arithmetic processing circuit such as a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The ROM stores a control program for controlling the suction operation of the sheet suction device 1. The control unit 17 reads the control program stored in the ROM and expands the control program in the RAM, so that the switch 14 can be operated based on the sheet detection signal from the sheet detection sensor 15 and the photographing end signal from the camera 2. And the fan 16 are controlled to perform the suction operation.

Next, the suction operation of the sheet suction device will be described in detail with reference to FIGS.

The sheet detection sensor 15 monitors the placement of the sheet on the placement surface (step S101). When the user places the sheet on the placement surface, the sheet detection sensor 15 controls the placement of the sheet by the sheet detection signal. Notice. In the initial state where the placement of the sheet is monitored, all the individual switches SWa to SWd of the switch 14 are switched to the ground terminal.

The control unit 17 notified of the placement of the sheet switches the individual switch SWa of the switch 14 to the negative terminal of the power supply 13 (step S102), and as shown in FIG. An electric charge is supplied to 12a. As a result, static electricity is generated on the charging member 11 facing the individual electrode pattern 12a. Instead of the sheet detection sensor 15, an input unit that receives a suction instruction may be provided, and the control unit 17 may execute step S102 in response to the suction instruction.

Next, the control unit 17 switches the individual switch SWb of the switch 14 to the negative terminal of the power supply 13 (step S103), and as shown in FIG. 4B, the individual electrode arranged so as to surround the individual electrode pattern 12a. An electric charge is supplied to the pattern 12b. As a result, static electricity is also generated on the charging member 11 facing the individual electrode pattern 12b.

Next, the control unit 17 switches the individual switch SWc of the switch 14 to the negative terminal of the power supply 13 (step S104), and as shown in FIG. 5A, the individual electrode arranged so as to surround the individual electrode pattern 12b. An electric charge is supplied to the pattern 12c. As a result, static electricity is also generated on the charging member 11 facing the individual electrode pattern 12c.

Next, the control unit 17 switches the individual switch SWd of the switch 14 to the negative terminal of the power supply 13 (step S105), and as shown in FIG. 5B, the individual electrodes arranged so as to surround the individual electrode pattern 12c. An electric charge is supplied to the pattern 12d. As a result, static electricity is also generated on the charging member 11 facing the individual electrode pattern 12d.

The control unit 17 executes steps S102 to S105 at predetermined intervals set in advance. As a result, the sheet placed on the placement surface is gradually electrostatically adsorbed from the central portion toward the peripheral portion. Therefore, even if the sheet originally bends or curls, the entire surface of the sheet can be adsorbed neatly without wrinkling or rising.

Next, the control unit 17 waits for the input of a shooting end signal for notifying the end of shooting by the camera 2 (step S106). When the shooting end signal is input in step S106, the control unit 17 switches all the individual switches SWa to SWd of the switch 14 to the ground terminals (step S107). As a result, the static electricity on the charging member 11 decreases, and the attraction force for the sheet disappears. An input unit that receives a suction end instruction instead of the image pickup end signal may be provided, and the control unit 17 may execute step S107 in response to the suction end instruction.

Next, the control unit 17 turns on the fan 16 (step S108) and blows air from the lower side to the peripheral portion of the sheet via the ventilation port 18 formed in the charging member 11. As a result, the peripheral edge of the placed sheet is turned up, and by grasping the turned-up portion, the sheet can be easily removed from the placement surface.

Next, the sheet detection sensor 15 monitors the removal of the sheet from the placement surface (step S109). When the user removes the sheet from the placement surface, the sheet detection sensor instructs the control unit 17 to remove the sheet based on the sheet detection signal. Notice.

The control unit 17, which has been notified of the removal of the sheet, turns off the fan 16 (step S110), stops the blowing, and ends the suction operation.

As described above, according to the present embodiment, the charging member 11 formed of a dielectric material and provided so as to cover the mounting surface on which the sheet is mounted, and the inside or the lower surface side of the charging member 11 are provided. , A plurality of individual electrode patterns 12a to 12d arranged from the central portion of the mounting surface toward the peripheral portion, and an electric charge from the individual electrode pattern 12a located at the central portion toward the individual electrode pattern 12d located at the peripheral portion. It is provided with a charge supply unit (power supply 13, switch 14, control unit 17) that is sequentially supplied.
With this configuration, even if the sheet originally bends or curls, electrostatic attraction can be sequentially performed from the central portion, so that the entire surface of the sheet can be attracted cleanly.

Further, in the present embodiment, a sheet detection sensor 15 that is a sheet detection unit that detects the placement of the sheet on the placement surface is provided, and the control unit 17 causes the sheet detection sensor 15 to detect the sheet on the placement surface. When the placement is detected, the switch 14 is controlled to start supplying the electric charge from the power supply 13.
With this configuration, electrostatic attraction can be started only by placing the sheet.

Further, in the present embodiment, the fan 16 is provided as an air blower that blows air toward the back surface of the sheet placed on the placement surface through the ventilation port 18 formed in the charging member 11.
With this configuration, the sheet can be easily removed.

It should be noted that the present invention is not limited to each of the above-described embodiments, and it is obvious that each embodiment can be appropriately modified within the scope of the technical idea of the present invention. Further, the number, position, shape, etc. of the above-mentioned constituent members are not limited to those in the above-mentioned embodiment, and the number, position, shape, etc. suitable for carrying out the present invention can be adopted. In each figure, the same components are designated by the same reference numerals.

1 Sheet Adsorption Device 2 Camera 3 Image Processing Device 11 Charging Member 12 Electrode Patterns 12a to 12d Individual Electrode Pattern 13 Power Supply 14 Switch 15 Sheet Detection Sensor 16 Fan 17 Controller 18 Ventilation Port SWa to SWd Individual Switch

Claims (3)

A charging member formed of a dielectric material and provided so as to cover a mounting surface on which the sheet is mounted,
Inside or on the lower surface side of the charging member, a plurality of electrode patterns arranged from the central portion of the mounting surface toward the peripheral portion,
A sheet adsorbing device, comprising: a charge supply unit that sequentially supplies charges from the electrode pattern located in the central portion toward the electrode pattern located in the peripheral portion. The sheet detection unit for detecting the placement of the sheet on the placement surface,
The sheet suction device according to claim 1, wherein the charge supply unit starts supply of charges when the sheet detection unit detects that the sheet is placed on the placement surface. The sheet suction device according to claim 1 or 2, further comprising: a blowing device that blows air toward a back surface of the sheet placed on the placement surface through a ventilation port formed in the charging member.

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