JPH11184347A - Electrostatic recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrostatic recorder whose constitution is simple, which is made inexpensive and where recording paper is stably carried. SOLUTION: Arms 10 where a rack moved by a gear 11 is formed are installed on both sides, and opposed rollers 9 are installed at the edges of the arms 10 so as to approach a head 8 and a developing unit 14. A tension roller 5 is installed at the end of a supporting plate 7 fixed at the halfway part of the arm 10 through a compression spring 6. When the roller 5 rises, it press- contacts with an idler roller 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electrostatic latent image forming means for forming an electrostatic latent image on an image support, and a developing means for developing the electrostatic latent image with charged developing particles. The present invention relates to an electrostatic recording device having the same.

[0002]

2. Description of the Related Art An electrostatic recording apparatus has an electrostatic latent image forming means for forming an electrostatic latent image on an image support, and a developing means for developing the electrostatic latent image with charged visualized particles. In particular, regarding the liquid developing means, see, for example, the Society of Electrophotography, Basics and Applications of Electrophotographic Technology, Corona (1988) P276-
Filling the developing dish with liquid developer as described in P283,
Dish development in which development is performed by passing the image support on which a latent image is formed, or a liquid developer thin film is formed on the periphery of the developing roller, and the image support on which the electrostatic latent image is formed is brought into close proximity. Techniques such as roller development in which development is performed are known.

[0003]

However, according to the above-mentioned prior art, since a supply source of the liquid developer and a device for adjusting the concentration of the liquid developer are required, the size and cost of the device have been problematic. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electrostatic recording apparatus which has a simple structure, can be manufactured at a low cost, and has a stable recording paper conveyance.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide a method for oscillating a number of oscillating points in a device by using a small number of driving means.
Or, it is achieved by increasing the number of common parts. For example, the opposing roller and the tension roller at the time of forming the electrostatic latent image, and the opposing roller and the tension roller at the time of developing are oscillated by one driving means. Is achieved by sharing

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are side views of an electrostatic recording apparatus which best illustrates the features of the present invention. FIG. 1 shows a state when an electrostatic latent image is recorded, and FIG. This shows the state when developing the recording of the latent image.

In FIG. 1 and FIG. 2, a recording device 1
Each element is composed of a hopper 2, a head 8, a paper feed roller 13, and a developing unit 14 in this order. It is assumed that the hopper 2, the head 8, the paper feed roller 13, and the developing unit 14 are fixed to the side plate of the recording apparatus 1.

The hopper 2 can be filled with recording paper 15, and a paper feed roller 3 for supplying the recording paper 15 to a paper feed roller 13 is provided below the hopper 2.

An opposing roller 9a is installed at a position facing the head 8 across the recording paper path 16, and the opposing roller 9a is installed at the tip of an arm 10a. A rack is formed on the arm 10a, and has a structure that can be moved up and down by rotation of the gear 11.

A recording device 1 is provided between the hopper 2 and the head 8.
An idler roller 4a fixed to the side plate is provided, and a tension roller 5a is installed at a position facing the idler roller 4a across the recording paper path 16, and the tension roller 5a is fixed to the middle of the arm 10a. The supporting plate 7a is provided at an end of the supporting plate 7a via a compression spring 6a.

Similarly, the recording paper path 1 of the developing unit 14
An opposing roller 9b is installed at a position opposing the unit 6 with the opposing roller 6, and the opposing roller 9b is installed at the tip of an arm 10b. A rack is formed on the arm 10b, and has a structure that can be moved up and down by rotation of the gear 11. Below the developing unit 14, an idler roller 4b fixed to a side plate is installed.
b, a tension roller 5b is installed at a position facing the recording paper path 16 with the tension roller 5b interposed therebetween.
Is mounted on the end of a support plate 7b fixed to the middle of the arm 10b via a compression spring 6b.

That is, the location driven by the gear 11 is as follows:
Since the head 8 side and the developing unit 14 side have the same configuration, the parts of the idler roller 4, the tension roller 5, the compression spring 6, the support plate 7, the opposing roller 9, and the arm 10 may be common. it can.

The holding roller 12 is constantly pressed against the paper feed roller 13 by the compression spring 6c. In addition,
In the recording apparatus 1 of the present invention, since the recording paper 15 other than the supply is conveyed only by the paper feed roller 13, it is desirable that the paper feed roller 13 use a roller having a conveyance force such as an emery roller.

In the recording apparatus 1 having the above-described structure, the recording paper 15 is supplied to the paper feed roller 13 by the paper feed roller 3. When the recording paper 15 is nipped by the paper feed roller 13 and the nipping roller 12, the gear 11 rotates left and the opposing roller 9a moves to the head 8 side. That is, the tension roller 5a also moves toward the idler roller 4a at the same time.

The positional relationship between the opposing roller 9a and the tension roller 5a is as follows. First, the tension roller 5a comes into contact with the idler roller 4a, and the gap between the head 8 and the opposing roller 9a is pushed up to a certain appropriate value.
It is desirable that the pressing force between the idler roller 4a and the tension roller 5a has an appropriate value.

In this state, when the paper feed roller 13 is rotated counterclockwise to convey the recording paper 15, the tension roller 5a
And the paper feed roller 13 is in a tight state. By doing so, the recording paper 15 does not undulate on the opposing roller 9a, and the gap from the head 8 to the recording surface of the recording paper 15 is made equal to the left and right if the tension roller 5a and the head 8 are parallel. And the same level of electrostatic latent image can be formed on the left and right sides.

The opposing roller 9b at the time of forming the electrostatic latent image is
Since it is away from the developing unit, there is no problem such as paper jam.

When developing the recording of the electrostatic latent image on the recording paper 15, the gear 11 and the paper feed roller 13 are rotated clockwise, and the other positions and movements are the same as in the formation of the electrostatic latent image. Can be developed. The developed recording paper 15 is discharged under the hopper 2.

[0020]

According to the present invention, it is possible to provide an electrostatic recording apparatus which has a simple structure, can be manufactured at a low cost, and has a stable recording paper conveyance.

[Brief description of the drawings]

FIG. 1 is a side view of an electrostatic recording apparatus when an electrostatic latent image is formed according to an embodiment of the present invention.

FIG. 2 is a side view of the electrostatic recording apparatus at the time of development according to one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Recording device, 2 ... Hopper, 3 ... Feed roller, 4 ... Idler roller, 5 ... Tension roller, 6 ... Compression spring, 7
... Support plate, 8 head, 9 opposing roller, 10 arm, 11 gear, 12 pinching roller, 13 paper feed roller, 14 developing unit, 15 recording paper, 16 recording paper path.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mitsuzu Suzuki 1-1-1, Higashitagacho, Hitachi City, Ibaraki Prefecture Inside the Taga Headquarters, Hitachi, Ltd.Electrical Equipment Division (72) Inventor Junichi Matsuno Shinchi, Tsuchiura City, Ibaraki 502 Nachi-machi Machinery Research Laboratories (72) Inventor Shogo Matsumoto 502 Kandatecho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratories Co., Ltd. Company Hitachi Machinery Research Laboratory

Claims (4)

[Claims] 1. A latent image forming means for forming an electrostatic latent image corresponding to an image signal on a recording medium, a conveying means for carrying the recording medium by one driving roller, and developing the electrostatic latent image on the recording medium. In a recording apparatus having a developing unit, the unit is arranged in the order of a latent image forming unit, a conveying unit, and a developing unit, and a tension roller for pulling a recording medium is installed upstream of the latent image forming unit, and the recording medium is separated from the latent image forming unit. A facing roller that can move up and down at a position facing the latent image forming means, and when the latent image is formed on the recording medium, the facing roller moves toward the latent image forming means, and at the same time when the recording medium is conveyed. An electrostatic recording device characterized by applying tension. 2. A latent image forming means for forming an electrostatic latent image corresponding to an image signal on a recording medium, a conveying means for carrying the recording medium by one drive roller, and developing the electrostatic latent image on the recording medium. In a recording apparatus having a developing unit, the unit is arranged in the order of a latent image forming unit, a conveying unit, and a developing unit, and a tension roller for pulling a recording medium is provided downstream of the developing unit. An opposing roller that can move up and down at a position opposing the means, and at the time of development on the recording medium on which the latent image is formed, the opposing roller moves to the developing means side;
An electrostatic recording apparatus, wherein a tension is simultaneously applied to a recording medium when the recording medium is conveyed. 3. A latent image forming means for forming an electrostatic latent image corresponding to an image signal on a recording medium, a conveying means for carrying the recording medium by one drive roller, and developing the electrostatic latent image on the recording medium. 3. An electrostatic recording apparatus according to claim 1, wherein said recording apparatus has a developing unit. 4. The electrostatic recording apparatus according to claim 3, wherein
An electrostatic recording apparatus characterized in that the movement of an opposing roller facing a latent image forming means and a developing means is simultaneously moved by one driving means.