JPH0353267A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent the flocculation and caking of a developer that is carried and accumulated in the vicinity of a recording electrode and the omission of an image by moving a carrying means which stretches a recording medium to carry, widening a gap between the recording electrode and the recording medium and shifting the developer. CONSTITUTION:The rotating shaft 7a of a driving roller 7 is supported with a bearing 20 to move vertically, and a bearing 21 is fitted in the vicinity of the end of the rotating shaft 7a. The bearing 21 is pushed against a L-shaped positioning member 22 fitted to a nonmagnetic cylinder 3 to maintain the distance between the recording electrode 1 and the recording sheet 5 at high accuracy. When a plunger 26 is energized, a retaining member 24 rotates clockwise around a shaft 23 to move the bearing 21 and the rotating shaft 7a upward, and the roller 7 separates from the electrode 1. In this case, the roller 7 is periodically shifted to widen the gap between the sheet 5 and the electrode 1. The omission of an image causing from the flocculating of the toner 2 accumulated in the vicinity of the electrode 1 after it is moved can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to image formation Ln in which an image is formed by statically depositing a developer onto a recording medium.

<Prior Art> Today, various devices have been developed that form images according to image information. There is an image-forming device that forms an image by attaching it to a surface. For example, a method disclosed in Japanese Patent Publication No. 51-46707 has been proposed. That is, in FIG. 4, the non-magnetic cylinder 5
Conductive magnetic toner 51 is placed on the outer periphery of the non-magnetic cylinder 5.
It is conveyed by the magnetic field of a rotating magnet 52 provided coaxially with 0. At this time, a finger pressure corresponding to the image information is applied by the recording control section to the recording poles 53 that are densely arranged along the axial direction on the outer peripheral surface of the non-magnetic cylinder 50. At this time, the conductive layer 5 is disposed close to the non-magnetic cylinder 50 from the back side.
By applying the above-mentioned voltage between the recording medium 54 formed by laminating the 4b1-1A layer 54a and the above-mentioned exclusive layer 54b, the toner 51 is attached to the insulating layer 54a to form an image.

In addition, as an image forming bag holder to which the above image forming method is applied, as shown in FIG.
An image is formed on the recording medium 54, which has been moved to a position opposite to the toner 6, by whether or not toner is attached to the recording medium 54 depending on the signal from the recording electrode 56.

For example, when a signal voltage of +40V is applied from the recording control unit 58, the toner 57 adheres to the recording medium 54, and when the voltage is OV, it does not adhere, thereby forming an image.

The toner 57 attached to the recording medium 54 is removed from the image display section 5.
After the image is displayed, the cleaning member 60
211 and falls onto the magnetic roller 55-1, where it is fed again and prepared for the next recording.

Further, the lightning charge on the recording medium 54 can be eliminated by applying a high-ass pressure of opposite polarity to the cleaning member 60 from the neutralization source 61. The flff history is deleted.

Problems to be Solved by the Invention> However, in the above-mentioned promotion technique, the recording electrode 56
In some cases, the toner 57 aggregates in the vicinity of , and no image is formed.

That is, as shown in area a in FIG.
It is necessary for good image formation to be deposited, but after long-term use, the toner 57 in area a hardens, hindering the conveyance of the toner 57 necessary for image formation, and partially There was a risk that the image would be missing.

Furthermore, when a recording medium 54 in the form of a belt with a long end is used, the heel seam becomes thicker than other parts. If the gap between the recording electrode 56 and the drive roller 61 that conveys the recording medium 54 is set so that the seam of the recording medium 54 is not obstructive, the gap between the recording electrode 56 and the drive roller 6l will be large. There was a risk that the sharpness of the image would be lost. The present invention solves the above-mentioned problems of the prior art and provides an image forming gz in which a conveying means for conveying the recording medium can be moved in a direction where the recording medium is disturbed from the recording electrode.

<Means for Solving the Problems> The means for solving the above-mentioned problems of the prior art and applied to the examples listed below include recording electrodes and recording electrodes for applying spiritual pressure to the developer according to image information. , a developer supply means for supplying a developer between the recording electrode and the recording medium, a recording medium to which the developer is attached to form an image, and a means for hanging and passing the recording medium. The moving means for conveying and the recording medium are described in 1! and a moving means capable of moving the K feeding means in a direction that allows cutting from the electrode.

Effects> According to the above means, a conveying means for passing the recording medium across the recording medium and a moving means capable of moving the conveying means in a direction in which the recording medium moves away from the recording electrode are provided. By moving the conveyance means to widen the distance between the recording electrode and the recording medium, the developer transported and deposited near the recording electrode can be moved and prevented from solidifying.

Furthermore, if the recording medium has a seam, the thickness of the seam can be absorbed by moving the recording medium conveying means, and the distance between the recording medium and the recording pole can be kept sufficiently small. , it is possible to form sharp images.

<Example> Image formation to which the present invention is applied will be described below with reference to the drawings! ji
An example of this will be described.

Fig. 1 is a perspective explanatory view of a conveying means for bib recording medium, Fig. 2 is a schematic cross-sectional view of an image forming device to which the above conveying means is applied, and Fig. 3 is a recording medium used in the above-mentioned storage. FIG.

First, a schematic configuration of an image forming apparatus to which the present invention is applied will be explained with reference to FIG.

In FIG. 2, l is a recording electrode for distributing a developer according to image information, and the recording electrode l supplies a conductive magnetic developer (hereinafter referred to as R toner) 2. A developer for the purpose (a developer is closely attached along the axial direction to the outer circumferential surface of a non-magnetic cylinder 3 which is a sleeve means. A rotating magnet 4 is coaxially attached to the non-magnetic cylinder 3, and the rotating magnet 4 The toner 2 is conveyed along the outer peripheral surface of the non-magnetic cylinder 3 by the force of the magnet 4.

An endless belt-shaped recording sheet 5 is attached to the recording electrode 1 and is a recording medium for forming an image by adhering the toner 2.
are arranged so that some of them are close to each other. The recording sheet 5 is stretched between a tension roller 6 and a drive roller 7, which are provided as an upper and lower pair in front, and serve as its image feeding means. The drive roller 7 is driven and rotated by a drive controller (not shown) to convey the recording sheet 5.

A recording control section 8 is connected to the recording electrode 1 for applying a voltage corresponding to image information. The recording control section 8
Is image 1+'? Recording sheet 5 below shows the voltage corresponding to the information.
of! The toner 2 is applied to the yI electric layer to deposit the toner 2 on the insulating layer to form an image.

As described above, the image formed on the recording sheet 5 is displayed externally when the recording cartridge 5 is conveyed in the eight directions of the arrow by the rotation of the drive roller and the image display section 9 is aided. Then, the recording sheet 5 that has passed through the image display section 9 is cleaned by a cleaning member 12 fixedly attached via a mounting member 11 attached to the back plate 10 of the main body, and the toner 2 adhered to the recording sheet 5 is removed! ．． 11 is removed, and the toner 2 falls onto the non-R cylinder 3 and is transported to the next recording (l12).

The cleaning member 12 is a cleaning member main body 12
a and a soft, spiritually guiding brush 12b, which rubs against the recording sheet 5 at an appropriate angle and distance to remove the adhering toner 2. Further, the cleaning member wooden body 12a is attached to the recording sheet 5.
It is connected to the main power supply source 13 for applying a reverse bias to. The JiFq history of the recording sheet 5 is erased by applying a bias main pressure having a polarity opposite to that of the charge on the recording sheet 5 using the electric charge eliminating power source 13. The cleaning member 12 is made of a material such as flexible plastic (polyethylene, polypropylene), urethane rubber, silicone, etc., which has conductivity due to carbon fiber composite.

Further, a recording sheet 5? A non-R member 15 and a magnet 16 are provided for support.

Next, the structure of the recording sheet 5 applied to the image forming apparatus configured as described above will be explained with reference to FIG.

The recording sheet 5 includes a surface layer 5a made of a transparent material mainly composed of butyral resin, phenol resin, urethane resin, etc., a colored inorganic substance and an adhesive (acrylic resin, blastic acid resin, etc.). A colored layer 5b consisting of ! tJ
An electric shock layer 5c on which aluminum or IT○ (indium and tin oxide) is vapor-deposited to provide TI properties, and a base material 5d made of a blastinok resin such as polyethylene terephthalate, polyethylene, or polypropylene are polymerized. It is being organized.

The surface N5a and the colored layer 5b are electrically insulated, and the colored Pj5b is made of titanium oxide (TiOz) and aluminum oxide (
An inorganic substance such as Af■03) was used.

Next, referring to FIG. 1, a conveying means for conveying a recording medium and a moving means capable of moving the recording medium in a direction away from the recording pole will be explained. 1'61 A support unit 6 for supporting each of the rollers is provided on the back side of the end-helt-shaped recording sheet 5 stretched between the tension roller 6 and the drive roller 7. It is being

The rotating shaft 6a of the tension roller 6 is supported by a support 17, and the support 17 is movably fitted into a rail 18 provided in the support unit 6. A tension spring 19 is connected between the support plate 17 and the support unit 16, and the support unit 17 is connected to the rail 18.
It is biased upward along. As a result, an upward force is always acting on the tension roller 6, and a constant tension is applied to the recording sheet 5.

Next, since the distance between the recording electrode 1 and the recording sheet 5 is particularly important in image formation, the positioning of the drive roller 7 is extremely important.

The rotating shaft 7a of the driving roller rough is connected to the supporting unit I.
The rotating shaft 7a is supported movably in the vertical direction by a bearing 20 attached to the rotary shaft 7a, and a roller 21 is attached near the beveled portion of the rotating shaft 7a. The roller 2t is pressed against an L-shaped positioning portion 422 attached directly or indirectly to the non-magnetic cylinder 3 shown in FIG. It is designed to maintain high accuracy.

A holding member 24 rotatable about a shaft 23 is provided above the roller 21, and a tension bar 25 and a plunger 26 are connected to the holding member 24 at the top and bottom. One end of the pushing member 24 is always urged upward by a tension bar 25 to rotate in a counterclockwise direction about the shaft 23, and the other end presses the roller 2l against the positioning member 22.

On the other hand, when the plunger 26 is energized, the pressing member 24 rotates around the shaft 23 in the forward and backward directions, and the rollers 21
The rotating shaft 7a is moved upward, and the drive roller 7 is arranged to be separated from the recording electrode 1. The moving star of the driving roller rough is preferably about 0.1 to 2 nun.

Since normal image formation cannot be performed when the plunger 2G is activated, the plunger 2G is energized during non-image formation, such as between screens. Alternatively, even when the recording sheet 5 is in a stopped state, if the rotating magnet 4 is rotating, solidification of the toner 2 can be prevented, so the plunger 26 can be kept in place even when the recording sheet 5 is in a stopped state. It may be activated.

Further, the frequency of moving the drive roller 7 may be such that the image formation is performed for one screen to prevent the solidification of the toner 2, but it may be moved and moved every time several screens are formed. good.

According to the above structure, the toner 2 accumulated in the vicinity of the recording head 1 is moved by periodically moving the drive roller 7 to widen the distance between the recording sheet 5 and the recording electrode 1). This makes it possible to prevent image loss caused by solidification of the toner 2. Furthermore, if the recording sheet 5 has a seam and contact between the seam and the recording electrode 1 is to be avoided, the recording notebook 5
It may be moved each time the joint passes through the recording pole l or each time the non-image-forming part passes through the recording main pole l.

Therefore, even if the seam part of the recording sheet 5 is thick,
By moving the drive roller 7, the distance between the recording north pole 1 and the recording sheet 5 can be kept sufficiently small, and a sharp image can be formed. Note that the plunger 26 is used as a moving means for moving the position of the driving roller rough.
In addition to this, it is also possible to use a cam or the like.

Further, in the above embodiment, the driving roller 7 is moved, but it is also possible to move the positioning member 22 to move the position of the driving roller rough.

<Effects of the Invention> As described above, the present invention includes a transport means for stretching and transporting a recording medium, and a transport means that can move the transport means in a direction in which the recording medium is separated from the recording cage pole. By moving the transporting means and widening the distance between the recording master and the recording medium, the recording spirit is transported to the very vicinity of the recording medium, and the developer responsible for J(t.f. By moving and pasting the agglomerated solidification, it is possible to prevent image loss.

In addition, if there is a seam in the recording medium, the thickness of the seam can be absorbed by moving the recording medium stage feeding means to keep the distance between the recording medium and the recording green electrode sufficiently small. It is possible to create an i4￥ tax image.

[Brief explanation of drawings]

FIG. 1 is a perspective explanatory diagram of a feeding means for conveying a recording medium, FIG. 2 is a schematic sectional view of an image forming apparatus to which the above-mentioned feeding means is applied, and FIG. 3 is a recording medium used in the above-mentioned apparatus. The enlarged sectional view, FIG. 4, and FIG. 5 are explanatory diagrams of the conventional example. 2 is a recording electrode, 2 is a toner, 3 is a non-trivalent cylinder, 4 is a rotating magnet, 5 is a recording notebook, 5a is a surface layer, 5b is a colored layer, 5c is a conductive layer, 5d is a base {o, 6 is Tension rollers, 6a and 7a are rotating shafts, 7 is a drive roller, 8 is a recording control unit, 9 is an image display unit, 10 is a back plate, 1l is a mounting member, 1
2 is a cleaning member, 12a is a cleaning member main body, 12b is a brush, 13 is a power source for exorcism, l4 is a non-magnetic member, 15 is a magnet, 16 is a support unit, l7 is a support plate, 1
8 is a rail, 19. 25 is a tension spring, 20 is a support, 2
1 is a roller, 22 is a positioning member, 23 is a shaft, 24 is a holding member, and 26 is a plunger.

Claims (1)

[Scope of Claims] A recording electrode for applying a voltage to a developer according to image information, a developer supply means for supplying a developer between the recording electrode and a recording medium, and the developer. a recording medium to which an image is formed by adhering to the recording medium; a conveying means for conveying the recording medium across the recording medium; and a moving means capable of moving the conveying means in a direction in which the recording medium is separated from the recording electrodes. An image forming apparatus comprising: