JP2003081480A - Paper carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the attracting performance of a paper carrying device by using an electrostatic belt with built-in interdigital electrodes, thus achieving low cost and improved productivity and maintenance. SOLUTION: The paper carrying device comprises doubled interdigital electrode patterns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet fixing mechanism in a sheet conveying mechanism used in a printing apparatus in which a sheet is conveyed on a rotating belt and is printed by a print head during conveyance. .

Among the above-mentioned paper transport mechanisms, among others,
The present invention relates to a temporary fixing means for a sheet utilizing the suction action of a dielectric substance due to electrostatic force.

[0003]

2. Description of the Related Art An electrode plate having a comb-shaped pattern has been considered as a conventional means for temporarily fixing a sheet by utilizing the suction action of a dielectric substance due to an electrostatic force.

(Conventional Structure) An example of this conventional structure is shown in FIG.
Shown in. FIG. 2 shows a belt mechanism having a tooth-tooth electrode as shown in FIG. FIG. 3 shows a conceptual diagram of a conveying device using the belt mechanism as shown in FIG. An example of the power supply member in FIG. 3 is shown in FIG.

(Conventional operation) The operation in these configurations is as follows.

1. A high voltage with a potential difference between the positive electrode and the negative electrode of about several kilovolts is supplied from the power supply member such as the power supply power supply brush to the power supplied part.

Here, both the case where the negative electrode is connected to the ground potential or the case where a negative voltage is applied can be considered.

Either one may be selected depending on the actual implementation requirements such as the required function and performance of the device.

2. When the belt rotates with respect to the power supply unit that is fixed to the partial power supply, the voltage is applied only to the contact portion of the power supply unit and the power supply unit that is divided for each comb.

For example, when the paper is to be moved on a straight line, the power supply unit and the belt may be arranged to be on a straight line by the distance that is desired to be moved while attracting the paper. Here, the electrode belt in the section in which power is being supplied is referred to as an adsorption section.

3. When the paper placed on the electrostatically attracting rotating belt reaches the attracting portion, the electric field generated between the electrodes on the belt polarizes the dielectric such as the paper.

As a result, an attractive electrostatic force is generated to attract the paper and the belt.

[0013]

The attraction force by the comb-teeth electrode pattern is not always uniformly distributed.

That is, a portion without an electrode, an end portion of the electrode,
The spatial distribution of the density of the lines of electric force changes at the center of the electrode, etc., and the adsorption force is not constant. It has been experimentally found that the ends of the electrodes are relatively strong and the parts without electrodes are relatively weak. Therefore, it is necessary to pay attention to the positional relationship between the sheet and the electrode in terms of securing the suction force to the edge of the sheet, which is likely to be turned over.

On the other hand, when the sheet is conveyed by the belt, if the suction force at the edge of the sheet is insufficient, the belt and the edge of the sheet may not come into close contact with each other due to the curving of the shape of the edge of the sheet. obtain.

In that case, an accident may occur in which some mechanism, such as a printing head, located close to the upper portion of the belt comes into contact with the edge of the sheet being conveyed.

When the sheet being conveyed comes into contact with an approaching mechanism, the flatness of the sheet is rapidly lost partially or wholly at the contact portion, which has a great adverse effect on the conveyed state.

Further, the printing head that has come into contact with the paper may be hit fatally by its printing ability.

It is generally known that paper has a manufacturing direction called "plow". The direction of rigidity of the paper also depends on this. That is, the rigidity in the crevice direction is usually inferior to the rigidity in the vertical direction.

Therefore, when adsorbing with the conventional electrode pattern, the adsorbability is better when the crevice and the electrode pattern are perpendicular to each other than when they are parallel.

However, as shown in FIG. 1, the conventional electrode pattern is formed perpendicular to the paper transport direction,
No special attention has been paid to the positional relationship between the electrodes and the front end of the paper mounted on the rotating belt.

Therefore, there is a problem in suppressing the turning of the edge of the sheet, and accordingly, a problem remains in the stability of sheet conveyance.

[0023]

In view of the above problems, it is proposed to form the electrode pattern in a double comb shape.

The basic shape is shown in FIG.

[0025]

The present invention has the following various effects.

By forming the electrode pattern in the shape of double comb teeth, 1. It is possible to prevent the leading edge of the paper from being entirely mounted at an intermediate position between the electrodes. The effect of improving the adsorptivity of the tip can be expected.

Further, 2. It is possible to prevent the electrodes from being parallel to the sheet crease direction.

Due to these actions, 3. Improves transport stability when transporting paper by belt. 4. Improved transport efficiency by reducing transport accidents. It can be expected to improve the device performance.

Further, since the transportation stability is improved, 5. The design margin of the mechanism to be constructed is improved, and as a result, 6. Reduction of mechanism production cost. The economic effect can be expected.

Further, 7. Reduction of paper disposal rate by reducing transport accidents. That is, the effect of suppressing waste of global forest resources can be expected.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 is a case where both poles of a power feeding portion are installed on both sides of a belt. As shown in FIG.

(Embodiment 1) Embodiment 1 is almost the same as the above-mentioned conventional structural requirements.

The difference between the first embodiment and the conventional example is that the electrode pattern is not a simple comb-like shape, but is further formed with comb-like branches.

FIG. 6 shows a comb-teeth electrode pattern of this embodiment.

FIG. 7 shows a belt using the comb-teeth electrode pattern of this embodiment.

FIG. 8 shows an electrostatic carrying device according to this embodiment.

(Operation of this Embodiment) The present invention is a temporary fixing means for a sheet utilizing the suction action of the dielectric substance by electrostatic force.

Therefore, the operating principle is the same as that of the conventional example.

(Effects peculiar to the present embodiment) In the present embodiment, in order to realize forming the electrode pattern on the double comb teeth, it was achieved by modifying the conventional electrode pattern.

Therefore, among other things, no special considerations regarding the manufacture of the belt are necessary. It can be expected to improve the function without increasing the difficulty in manufacturing the belt.

(Supplement) None in particular.

(Embodiment 2) Embodiment 2 is characterized in that both poles of the power feeding portion are gathered on one side. It shows in FIG.

(Structure of the Second Embodiment) The second embodiment is almost the same as the above-mentioned structure of the first embodiment.

The difference between the second embodiment and the conventional example is that the positions of the power-supplied parts are gathered on one side, and accordingly, the installation positions of the power-feeding parts are also gathered on one side.

FIG. 9 shows a comb-teeth electrode pattern of the second embodiment.

FIG. 10 shows a belt using the comb-teeth electrode pattern of the second embodiment.

FIG. 11 shows an electrostatic carrying device according to the second embodiment.

(Operation of the Present Embodiment) The present invention is a temporary fixing means for a sheet utilizing the suction action of the dielectric substance by electrostatic force.

Therefore, the operating principle is the same as that of the conventional example.

(Effects peculiar to this embodiment) This embodiment has been achieved by deforming the conventional electrode pattern when the power feeding part is moved to one side.

Therefore, among other things, no special considerations regarding the manufacture of the belt are necessary.

The function can be expected to be improved without increasing the difficulty in manufacturing the belt.

(Supplement) None in particular.

[Brief description of drawings]

FIG. 1 Conventional comb tooth electrode shape

FIG. 2 Conventional comb electrode belt

FIG. 3 is a sheet conveying device using a conventional comb-teeth electrode belt.

FIG. 4 Power feeding member

FIG. 5 is a basic shape of a comb electrode according to the present invention.

FIG. 6 is a comb-teeth electrode shape according to the first embodiment.

FIG. 7 is a comb electrode belt according to the first embodiment.

FIG. 8 is a sheet conveying device using the comb-teeth electrode belt according to the first embodiment.

FIG. 9 is a comb-teeth electrode shape according to the second embodiment.

FIG. 10 is a comb-teeth electrode belt according to a second embodiment.

FIG. 11 is a sheet conveying device using a comb-teeth electrode belt according to the second embodiment.

[Explanation of symbols]

11 Positive or negative power feeding member (16. Negative or positive power feeding member) A member for supplying a high voltage to the electrode pattern from the outside. 12 Positive or negative power-supplied part (15. Negative or positive power-supplied part) A power-supplied part to be electrically connected to a power supply member. Not covered by an insulating layer. 13 Positive or Negative Electrode Plate (14. Negative or Positive Electrode Plate) An electrode that generates an electrostatic field together with an electrode plate having a different polarity. It is covered with an insulating layer. The electrode plates having different polarities are alternately arranged. 20 Positive or Negative Electrode Pattern 21 Negative or Positive Electrode Pattern 22 Drive Belt 23 Conveyor Belt 24 Pulley 25 Motor 40 High Voltage Connection Point 41 Brush 50 Positive or Negative Electrode Plate 51 Negative or Positive Electrode Plate 61 Positive or Negative Electrode Feeding member (66. Negative or positive feeding member) 63 Positive or negative electrode plate (64. Negative or positive electrode plate) 62 Positive or negative fed portion (65. Negative or positive fed portion) 70 Positive Or negative electrode pattern 71 Negative or positive electrode pattern 72 Drive belt 73 Conveying belt 74 Pulley 75 Motor 93 Positive or negative electrode plate (94. Negative or positive electrode plate) 92 Positive or negative fed portion (95. Negative or positive power-supplied part) 91 Positive or negative power feeding member (96. Negative or positive power feeding member) 100 Positive or negative electrode pattern 101 Negative or positive electrode Turn 102 Drive belt 103 Conveyor belt 104 Pulley 105 Motor 300 Positive or negative power supply member (25. Negative or positive power supply member) 301 Positive or negative electrode pattern (24. Negative or positive electrode pattern) 302 High voltage generator 303 Power feeding unit 307 Drive belt 308 Conveying belt 309 Pulley 310 Motor 801 Positive or negative electrode pattern (802. Negative or positive electrode pattern) 803 Positive or negative power feeding member (804. Negative or positive power feeding member) 805 High voltage Generator 806 Power feeding member 807 Drive belt 808 Conveying belt 809 Pulley 810 Motor 1101 Positive or negative electrode pattern (1102. Negative or positive electrode pattern) 1103 Positive or negative power feeding member (1104. Negative or positive power feeding member) 1105 High Voltage generator 1106 Power supply unit 1107 drive belt 1108 conveying belt 1109 pulley 1110 motor

Claims (2)

[Claims] (1) One of the electrodes has a comb-like shape in which a further comb is formed, and each comb is independent, and (2) the other electrode also has a comb-like shape. The comb has a shape in which a further comb is formed, and each comb is independent of each other. (3) The electrode of (1) above is the surface of the part corresponding to the root of the comb of the electrode, It has a power-supplied part that is not insulated so that it can receive power supply. (4) The surface of the electrode of (2) above, which is the base of the electrode comb, is insulated to receive power supply from it. (5) Both electrodes are electrically insulated from each other, and (6) the double comb-teeth electrode in (1) above and 2 in (2) above.
A belt in which heavy comb-teeth electrodes are alternately formed on the surface thereof at equal intervals over the entire circumference, and (7) a pulley that supports the belt while rotating the belt in (6) above, (8) A belt transfer device comprising: a drive belt for transmitting a rotational force to the pulley of (7), and (9) a motor for rotating the belt via the drive belt of (8). (10) A feeding member capable of transmitting some electric potential to the electrode having the double comb-tooth shape of (1) above, and (11) the electrode having the double comb-tooth shape of (2) above. A power supply member capable of transmitting a certain electric potential to the power supply member, and (12) a voltage generator capable of applying a certain electric potential to the power supply member of the above (10) and (11), respectively. (13) The power supply member of the above (10) Electrically to transfer power from (3) connected to the power-supplied part, (14) electrically connected to the power-supplied part (4) to transmit power from the power supply member (11), (15) described in (12) above. An electrostatic field generator for generating an electrostatic field on the belt according to (8) by a voltage generator, comprising: the belt conveying device according to (1) to (9);
(15) A conveyor device using a belt having an electrostatic attraction mechanism, which comprises the electrostatic field generator. 2. A conveyor device using a belt having an electrostatic attraction mechanism according to claim 1, wherein the power-supplied part of (3) and the power-supplied part of (4) are not on both sides of the belt but on one end. It is characterized in that it is arranged in the vicinity, characterized in that the power supply unit of the above (10) and the power supply unit of the above (11) are arranged in the vicinity of one end, not on both sides of the belt, A conveyor device with a belt that has an electrostatic adsorption mechanism.