JPH06255823A - Conveying device - Google Patents

Abstract

PURPOSE:To surely convey recording mediums one by one and easily peel the recording mediums from a conveying belt. CONSTITUTION:A conveying device of recording mediums is stretched with a conveying belt 2 between a pair of support rollers 3A, 3B, and it is provided with multiple electrostatic sucking plates 4 each having a plus electrode and a minus electrode in the caterpillar-like state in parallel with the axial direction of the support rollers 3A, 3B on the conveying belt 2. The plus electrodes of the electrostatic electrode plates 4 are connected together and the minus electrodes are connected together with connecting lines provided on the conveying belt 2 respectively, the plus electric power is fed to all plus electrodes of the electrostatic electrode plates 4 via the connecting line in the lump, the minus electric power is fed to all minus electrodes via the connecting line in the lump, and the recording mediums are sucked and conveyed by the conveying belt 2 with electrostatic sucking plates rotated between the support rollers 3A, 3B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveying device used for carrying out a recording medium to a recording section side and feeding it in an electrophotographic apparatus or the like.

[0002]

2. Description of the Related Art Conventionally, in this type of transport device, transport of a recording medium (recording paper) housed in a paper feed tray is
A feed roller method using a rubber roller or a friction retard method using a rotating belt is used. The feed roller method is one in which a rotating feed roller is brought into contact with the stacked recording medium to feed it out, and the friction / retard method is one in which a rotating belt stretched between support rolls is brought into contact with the recording medium. In addition to sending out, a retard pad is arranged on the lower surface side of the rotating belt to ensure that the recording medium can be conveyed one by one.

On the other hand, Japanese Patent Publication No. 3-77991 proposes a transporting device capable of sending out a recording medium by utilizing electrostatic attraction. In this transport device, an insulating belt stretched between support rollers is charged with a charging brush so that the recording medium can be transported in the paper feeding direction by the electrostatic attraction force of the insulating belt. There is.

[0004]

SUMMARY OF THE INVENTION In the above-described conventional conveying device using the feed roller system, a rotating rubber roller is simply brought into contact with the upper surface of the recording medium and is sent out by a frictional force. Therefore, there is a problem in that the recording medium is repeatedly fed and a paper feeding error is likely to occur. Further, in the friction retard system, the recording medium can be reliably sent out, but there is a problem that the transport mechanism becomes complicated.

Further, in the transporting device described in the above-mentioned publication, the recording medium is transported in close contact with a continuously insulating belt which is always charged by electrostatic attraction, so that the recording medium is transported. However, it was difficult to peel from the belt, and it was necessary to use a mechanical peeling means to peel the recording medium. For this reason, conventionally, a peeling plate has been installed at the discharge portion of the recording medium.

The present invention has been proposed in order to solve the problems of the prior art as described above, and makes it possible to reliably transport recording media one by one, and
An object of the present invention is to provide a conveying device that can easily separate the recording medium from the conveying belt.

[0007]

In order to achieve this object, the invention of claim 1 is a device for conveying a recording medium, wherein a conveying belt is stretched between a pair of supporting rollers, and the conveying belt is provided on the conveying belt. A plurality of electrostatic attraction plates with positive and negative electrodes are provided in an endless track parallel to the axial direction of the support roller, and the positive electrodes of these electrostatic electrode plates are supplied with positive power and the negative electrodes are supplied with negative power. Then, the recording medium is conveyed while being adsorbed by the conveying belt with an electrostatic attraction plate that rotates between the supporting rollers.

Further, the transport apparatus according to the invention of claim 2 is
A conveyor belt is stretched between a pair of support rollers, and a plurality of electrostatic attraction plates having positive and negative electrodes are provided on the conveyor belt in an endless track parallel to the axial direction of the support rollers. Connect the positive electrodes of the plates to the negative electrodes with the connection lines provided on the conveyor belt, and supply the positive power to all the positive electrodes of all the electrostatic electrode plates through the connection lines at once, and connect the negative electrodes to the connection line. It is configured so that the negative power supply can be collectively fed via the.

Further, the transport apparatus according to the invention of claim 3 is
A positive power supply electrode connected to a positive power supply is provided on the one support roller, a negative power supply electrode connected to a negative power supply is provided on the other support roller, and the positive power supply electrode and the negative power supply electrode are connected to the conveyor belt. Each line is brought into contact with the positive electrode and the negative electrode of each electrostatic attraction plate to supply power.

Further, the transport apparatus according to the invention of claim 4 is
A conveyance belt is stretched between a pair of support rollers, and a plurality of electrostatic attraction plates having positive and negative electrodes are provided on the conveyance belt in an endless track parallel to the axial direction of the support roller. The positive and negative feeding electrodes are provided on both sides of the feeding path of the feeding path, and feeding is performed by contacting these feeding electrodes with the plus and minus electrodes of the electrostatic attraction plate on the feeding belt located on the feeding side of the recording medium. It can be configured.

[0011]

According to the constitutions corresponding to the above-mentioned claim 1 and claim 2, since the electrostatic force generated by the plus electrode and the minus electrode of the electrostatic attraction plate acts on the recording medium to attract it, the conveyor belt. Thus, the recording medium can be conveyed while being electrostatically adsorbed.

According to the structure corresponding to claim 3,
The pair of support rollers serve as a power supply unit, and power can be supplied from these support rollers to the electrodes of the electrostatic attraction plate on the conveyor belt.

According to the structure corresponding to claim 4,
Since power can be supplied only to the electrodes of the electrostatic attraction plate on the support belt located on the transport side of the recording medium, the recording medium can be easily peeled off at the discharge portion where the recording medium is separated from the transport belt. .

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of a conveying device according to the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of this carrying device. In this figure, a pair of support rollers 3
A conveyor belt 2 made of an insulating material is stretched over A and 3B, and a plurality of electrostatic adsorption plates 4 are formed on the outer peripheral surface of the conveyor belt 2 at regular intervals in parallel with the roller axial direction in an endless track shape. It is provided in. The main body of the electrostatic attraction plate 4 is made of an insulating material, and plus electrodes 5A and minus electrodes 5B are embedded in the width direction of the belt 2 alternately in a comb shape as shown in FIG. The positive electrode and the negative electrode of each electrostatic attraction plate 4 are attached to the left and right electrode connection lines 6A attached to the belt 2 so as to pass under the attraction plate 4.
6B, respectively. Since the positive power source 8A is externally connected to the electrode connection line 6A and the negative power source 8B is connected to the electrode connection line 6B, the positive electrodes of all the electrostatic attraction plates 4 are connected through the electrode connection lines 6A and 6B. The plus power source 8A is fed to 5A all at once,
The minus power source 8B is fed to all the minus electrodes 5B at once.

In the transporting device constructed as described above, the plus electrode 5A and the minus electrode 5B of the electrostatic attraction plate 4 act on the recording medium 1 so that the electrodes 5A and 5B and the recording medium 1 are processed.
A plate capacitor is formed between the electrodes 5A and 5A,
The recording medium 1 is attracted to the electrostatic attraction plate 4 on the belt 2 by the electrostatic attraction generated between the recording medium 1 and the recording medium 1. As a result, the recording medium 1 is conveyed while being adsorbed to the electrostatic attraction plate 4 on the conveyor belt 2 that rotates between the support rollers 3A and 3B, and the belt 2 is covered by the discharge section where it is folded back on the roller 3B side. The recording medium 1 is easily peeled off and sent to the recording unit side.

Next, a carrying device of another embodiment shown in FIG. 3 will be described. In this embodiment, each support roller 3A, 3B
By connecting the plus power source 8A and the minus power source 8B respectively to the support roller 3A, the support roller 3A constitutes a plus side power feeding portion, and the support roller 3B constitutes a minus side power feeding portion. The power feeding electrode 9A is wound around the outer peripheral portion of the support roller 3A on the left end side in the figure, and the power feeding electrode 9B is also wound on the outer peripheral portion of the support roller 3A on the right end side. Further, on both sides of the inner peripheral surface of the conveyor belt 2, electrode connecting lines 6 on the outer peripheral side are provided.
Electrode connection lines 6A and 6B connected to A and 6B are respectively attached, and these inner connection lines 6 are connected.
A and 6B are in contact with the power supply electrodes 9 and 9 on both sides of the supporting rollers 3A and 3B, respectively.

As a result, the plus power source 8A can be collectively fed from the supporting roller 3A to the plus electrode 5A of each electrostatic attraction plate 4 via the feeding electrode 9A and the inner and outer peripheral electrode connection lines 6A, and the supporting roller 3B can be fed. The minus power source 8B can be collectively fed to all the minus electrodes 5B through the electrodes 9B and the inner and outer circumference electrode connection lines 6B. It should be noted that, instead of connecting the power source to each of the support rollers 3A and 3B from the outside, a plus power source 8A is built into the support roller 3A.
A configuration in which the negative power source 8B is built in B is also possible. As described above, in the carrying device of this embodiment, positive and negative voltages can be easily applied to the respective electrodes 5A and 5B of the electrostatic attraction plate 4 structurally.

Next, a carrying device according to still another embodiment shown in FIGS. 4 and 5 will be described. In this embodiment, a positive power supply electrode 7A and a negative power supply electrode 7B are laid on both sides of the conveyance path of the recording medium 1, and a positive power supply 8A and a negative power supply 8B are externally provided to the respective power supply electrodes 7A and 7B. It is connected. Further, as shown in FIG. 6, each electrostatic attraction plate 4 has a plus electrode 5A inside the attraction plate 4.
The contact piece 10A connected in common to is exposed on the outer surface, and when the conveyor belt 2 rotates, this contact piece 10A can come into contact with the positive power supply electrode 7A. Similarly, the contact piece 10B commonly connected to the negative electrode 5B in the suction plate 4 is exposed on the outer surface, and the contact piece 10B is brought into contact with the negative power supply electrode 7B.

In the carrying device thus constructed, the plus electrode 5A of each electrostatic attraction plate 4 on the carrying belt 2 in the section from A to B in FIG. 4 located on the carrying side of the recording medium 1.
Therefore, power can be supplied only to the negative electrode 5B. As a result, when the transport belt 2 rotates, the recording medium 1 is attracted by the electrostatic attraction plate 4 at the point A and is transported together with the belt 2, and is naturally peeled at the point B where the power supply is cut off and the recording unit side. Sent to.

[0020]

As described above, according to the present invention, the recording medium is conveyed while being electrostatically adsorbed by the electrostatic adsorption plate provided on the conveyance belt. In comparison, the recording media can be reliably delivered one by one regardless of the type and size of the medium, and no misfeeds or skews occur during transportation. Further, the retard pad used in the friction retard system is not required, and the configuration can be simplified. In addition, since a plurality of electrostatic attraction plates are installed on the conveyor belt in a track-like manner with a predetermined gap, after the electrostatic attraction plates are separated from the recording medium at the ejection section, There is a distance to the next electrostatic attraction plate that is attracting the medium, compared to the case where a continuous insulating charging belt is used as in the past,
The recording medium can be easily peeled off. Therefore, it is not necessary to install a peeling plate which is a mechanical peeling means, and the configuration can be simplified. Further, if power is supplied only to the electrostatic attraction plate on the transport belt located on the transport side of the recording medium, there is an advantage that the recording medium can be peeled off more easily. In addition, by using a supporting roller on which a belt is stretched as a power supply unit and supplying power from the supporting roller to each electrode of a plurality of electrostatic attraction plates through connection lines, it is possible to simplify a mechanism for supplying power. There are advantages.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a carrying device according to the present invention as viewed from a side direction.

FIG. 2 is an explanatory diagram of a main part of the transport device of FIG. 1 viewed from a bottom surface direction.

FIG. 3 is a perspective view showing a carrying device according to another embodiment.

FIG. 4 is a configuration diagram of a carrying device according to still another embodiment as viewed from a side surface direction.

5 is an explanatory view of the main part of the transport device of FIG. 4 viewed from the bottom surface direction.

6 is a vertical cross-sectional view showing a state of sliding contact between a power supply electrode and a contact piece in the transport device of FIG.

[Explanation of symbols]

 1 Recording Medium 2 Conveyor Belt 3A, 3B Support Belt 4 Electrostatic Adsorption Plate 5A Positive Electrode 5B Negative Electrode 6A, 6B Electrode Connection Line 7A Positive Power Supply Electrode 7B Negative Power Supply Electrode 8A Positive Power Supply 8B Negative Power Supply 9A, 9B Power Supply Electrode 10A , 10B contact piece

Claims (4)

[Claims] 1. In a recording medium conveying device, a conveying belt is stretched between a pair of supporting rollers, and a plurality of electrostatic attraction plates having a plus electrode and a minus electrode are provided on the conveying belt. By providing a positive power supply to the positive electrode of these electrostatic electrode plates and a negative power supply to the negative electrode of the electrostatic electrode plate in parallel with the direction, and by a conveyor belt with an electrostatic adsorption plate that rotates between the support rollers. A conveyance device for conveying a recording medium while adsorbing the recording medium. 2. In a recording medium conveying device, a conveying belt is stretched between a pair of supporting rollers, and a plurality of electrostatic attraction plates having a plus electrode and a minus electrode are provided on the conveying belt. It is provided in an endless track parallel to the direction, and the plus electrodes and minus electrodes of these electrostatic electrode plates are connected by connection lines provided on the conveyor belt, and connection lines are connected to the plus electrodes of all electrostatic electrode plates. Power is supplied collectively via the positive power supply via the connection line to all negative electrodes, and the recording medium is transferred while being adsorbed by the transfer belt with the electrostatic attraction plate that rotates between the support rollers. A transport device characterized by: 3. A positive power supply electrode connected to a positive power supply is provided on the one support roller, and a negative power supply electrode connected to a negative power supply is provided on the other support roller,
The transport device according to claim 2, wherein the positive power supply electrode and the negative power supply electrode are respectively brought into contact with the connection line of the transport belt to supply power to the positive electrode and the negative electrode of each electrostatic attraction plate. 4. A recording medium carrying device, wherein a carrying belt is stretched between a pair of supporting rollers, and a plurality of electrostatic attraction plates having plus and minus electrodes are provided on the carrying belt. It is provided in an endless track parallel to the direction, and positive and negative power supply electrodes are provided on both sides of the recording medium transport path. A feeding device characterized in that these feeding electrodes are brought into contact with the electrode and the minus electrode to feed power, respectively, and the recording medium is attracted and conveyed by a conveyor belt with an electrostatic attraction plate rotating between supporting rollers.