JPH07112892B2 - Carrier - Google Patents

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. In the feed roller method, a rotating feed roller is brought into contact with a stacked recording medium to feed it out.In the friction / retard method, a rotating belt stretched between supporting 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]

In the above-mentioned conventional conveying device using the feed roller system, the rotating rubber roller is simply brought into contact with the upper surface of the recording medium to be fed 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 the continuously insulating belt which is always charged by electrostatic attraction, and thus 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]

[Means for Solving the Problems] To achieve this object
According to a first aspect of the present invention, there is provided a recording medium conveying device.
The conveyor belt between the pair of support rollers in an endless track.
Install the positive electrode and the negative electrode on this conveyor belt.
To record multiple electrostatic attraction plates
Recording is provided discontinuously at intervals shorter than the length of the recording medium.
Positive feed electrode and negative feed on both sides of the media transport path
Electrodes are provided and located on the recording medium transport side
Supply these to the positive and negative electrodes of each electrostatic attraction plate.
Power is supplied by bringing the electrodes into contact with each other to attract the recording medium.
It is configured to be transported while being transported.

Further , the transport apparatus according to the invention of claim 2 is
The plurality of electrostatic attraction plates are independent of the plus
It has a contact piece that contacts the power supply electrode and the negative power supply electrode.
It is as a configuration.

[0009]

According to the above-described transport device, the recording medium
Use the electrodes of the electrostatic attraction plate on the support belt located on the transport side.
Since the power can be supplied to the recording medium, the recording medium is
The recording medium can be easily peeled off at the discharging portion.

[0010]

EXAMPLES Specific implementations of the transport device according to the present invention will be described below.
An example will be described in detail with reference to the drawings. This transport device is shown in Fig. 1.
An example of the apparatus will be described. In this figure, a pair of support rollers 3
The conveyor belt 2 made of an insulating material is in an endless track in A and 3B.
The conveyor belt 2 has a plurality of
The number of electrostatic attraction plates 4 is shorter than the length of the recording medium 1.
It is provided in parallel and discontinuously at intervals. Electrostatic attraction plate
The main body of the main body 4 is made of an insulating material having a rectangular shape.
As shown in, the plus electrode 5A and the minus electrode 5B are comb teeth.
Are alternately embedded in the width direction of the belt 2.

On both sides of the conveying path for the recording medium 1,
Positive power supply electrode 7A and negative power supply electrode 7B respectively
It has been laid and is added to each feeding electrode 7A, 7B from the outside.
Power source 8A and negative power source 8B are connected respectively
There is.

As shown in FIG.
Contact piece 1 commonly connected to the plus electrode 5A in the attachment plate 4
When 0A is exposed on the outer surface and the conveyor belt 2 rotates,
This contact piece 10A can contact the positive power supply electrode 7A.
It has become so. Similarly, the negative electrode in the adsorption plate 4
The contact piece 10B commonly connected to 5B is exposed on the outer surface.
And the contact piece 10B contacts the negative power supply electrode 7B.
To be done.

Therefore, the plus electrode 5 of the electrostatic attraction plate 4
A and the negative electrode 5B act on the recording medium 1 to cause an electric charge.
A flat plate capacitor between the poles 5A and 5B and the recording medium 1
And the electrodes 5A and 5B and the recording medium 1 are formed.
Due to the electrostatic attraction generated between the recording medium 1 and the recording medium 1,
It is attracted to the electrostatic attraction plate 4 on the belt 2.

In the transport device having such a structure,
The section from A to B in FIG. 1 located on the transport side of the recording medium 1
Positive electrode 5A of each electrostatic attraction plate 4 on the conveyor belt 2 between
And it becomes possible to supply power only to the negative electrode 5B.
There is.

As a result, when the conveyor belt 2 rotates
The recording medium 1 is attracted by the electrostatic attraction plate 4 at point A.
And the belt 2 is conveyed and the power is cut off at point B.
However, it is peeled off and sent to the recording unit side.

[0016]

As described above, according to the present invention, the multiple
Install a number of electrostatic attraction plates on the conveyor belt with a specified gap.
The electrostatic chucking plate from the recording medium is
After separating, the next electrostatic charge attracting the recording medium
There is a distance between the suction plate and
Compared with the case of using the edge charging belt,
Peeling can be easily performed. Therefore, mechanical
Since there is no need to install a peeling plate that is a simple peeling means,
Can be simplified. Also, it is located on the transport side of the recording medium.
Make sure that power is supplied only to the electrostatic attraction plate on the conveyor belt.
Therefore, the recording medium can be peeled off easily.
There is an advantage.

[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 diagram showing a structure of a feed electrode and a contact piece in the carrier device of FIG .
It is a longitudinal cross-sectional view showing a state of sliding contact.

[Explanation of symbols]

 1 Recording Medium 2 Conveyor Belt 3A, 3B Support Belt 4 Electrostatic Adsorption Plate 5A Positive Electrode 5B Negative Electrode 7A Positive Power Supply Electrode 7B Negative Power Supply Electrode 8A Positive Power Supply 8B Negative Power Supply 10A, 10B Contact Piece

Claims (2)

[Claims] 1. A recording medium conveying apparatus, wherein a conveying belt is stretched in an endless track between a pair of supporting rollers.
Then , place the positive and negative electrodes on the conveyor belt.
A plurality of electrostatic attraction plates, each independently having a recording medium
Are provided discontinuously at intervals shorter than the length of the recording medium, and positive power supply electrodes and
Equipped with eggplant power supply electrodes, each electrostatic attraction plate located on the recording medium transport side has a positive voltage.
Contact these feed electrodes with the negative electrode and the negative electrode, respectively.
Power is supplied to convey the recording medium while adsorbing it.
Characteristic transport device. 2. The plurality of electrostatic attraction plates are independent of each other.
And contact the positive power supply electrode and the negative power supply electrode.
The transport device according to claim 1, further comprising a contact piece.