JPS6189075A - Recorder - Google Patents

Abstract

PURPOSE:To attract and remove dust adhering to the surface of a recording head by providing a recording head in a freely attachable/detachable manner against recording member and also a dust attracting means in the attachment/ detachment path. CONSTITUTION:An ion cartridge (ion stream generating device) is attached in a freely movable manner in an axial direction of a dielectric drum 1 and a dust attracting means 30 is set in the movement path so that the means contacts the ion irradiation surface of the ion cartridge 2 to remove dust adhering to the surface of the ion cartridge 2. The dust attracting means 30 is constituted with a attracting roller having an adhesive tape provided on the external circumferential surface of an elastic roller such as sponge. Dust adhering to the ion irradiation surface of the ion cartridge 2 is attracted by adhesive tape and subsequently, the ion irradiation surface is cleaned.

Description

[Detailed Description of the Invention] (Technical Field) The present invention provides an ion flow generator with a large number of needles! ! A recording head consisting of a large number of arrayed recording units that perform recording on a pixel-by-pixel basis, such as a polar head or an optical fiber array head, is placed facing a recording member such as a dielectric drum, electrostatic recording paper, or photosensitive drum. This relates to a recording device.

(Prior Art) Various types of recording devices are known as described above, and one example of a recording device using an electrostatic printing technique is disclosed in Japanese Patent Application Publication No. 57-501848.

discloses a recording device using an ion current generator and a dielectric drum. This recording device projects an ion flow modulated in accordance with the image to be recorded onto a dielectric drum having a dielectric surface layer to form an electrostatic charge image, which is then developed with toner to form a toner image. This toner image is transferred onto recording paper by pressure and fixed 31. The ion current generating device has a large number of fine openings, as will be described later, and ion currents are emitted from these openings to form electrostatic charges on the dielectric drum. In such a recording apparatus, dust particles such as paper powder, cotton sludge, and toner floating in the atmosphere near the dielectric drum move as the drum rotates.

When the air containing these dust passes through the gap between the ion flow generator and the in'ah body drum, there is a possibility that the dust may adhere to the ion flow generator. in this case,
When dust adheres to the aperture that is the recording section of the ion flow generator, the movement of the ion flow to the dielectric drum is obstructed, and a sufficient amount of static charge is not deposited on the dielectric drum, resulting in a good static charge image. There is a drawback that it is not formed.

The above-mentioned drawbacks are particularly noticeable in recording devices that use ion flow generators with fine apertures, but they are also noticeable in electrostatic recording heads with multi-needle electrodes and optical recording heads with 7-eyeper arrays. If dust adheres to the needle electrode or fiber opening that constitutes the section, recording may not be performed properly.

(Object of the Invention) The object of the present invention is to eliminate the above-mentioned drawbacks, to effectively remove dust adhering to the recording head and dust contained in the air existing between the recording head and the recording member; It is an object of the present invention to provide a recording device that can perform good recording.

(Summary of the Invention) The present invention provides a recording apparatus in which a recording head configured by arranging recording sections that perform recording in pixel units is disposed facing a recording member, in which the recording head is movable in the direction in which the recording sections are arranged. 64, and is characterized in that a means for adsorbing and removing dust adhering to the recording head is provided in the movement path of the recording head, facing the recording head.

(Embodiment) Figure 1 is a diagram showing the configuration of an embodiment of the recording apparatus of the present invention. The dielectric drum 1 includes an aluminum base 1a,
It has a dielectric surface i1b formed thereon, and rotates at a constant speed in the direction shown by arrow A. The dielectric surface layer 1b is formed by anodizing the surface of the aluminum substrate 1a to form aluminum butyride and impregnating the surface with zinc stearate, and has the characteristics of high resistance and high hardness.

Around the dielectric drum 1, as seen in the direction of rotation, an ion current generating device 2, a developing device 3, a transfer/fixing device, a toner removing device, that is, a cleaning blade 5, and a static eliminator L6 are arranged. .

The ion current generation device 2 receives image signals from the WB eclipse signal generation circuit 7, etc., and projects an ion flow modulated in accordance with the image to be recorded onto the dielectric drum 1 to form an electrostatic charge image. be. This ion flow generating device 2 has various configurations, and one embodiment is shown in FIGS. 2 and 8.

2nd r! j! I is a plan view of one PJ of the ion flow generator 2, and FIG. 8 is a sectional view of a portion thereof.

A plurality of line electrodes 1 are formed on the surface of the substrate 8 via an insulating layer 9.
0 in parallel. A large number of finger electrodes 12 are arranged on the line electrode 10 via a transparent mica insulation *11 so as to cross the line electrode 10 diagonally. A hole 12a of a predetermined diameter is formed at a position intersecting with the hole 12a. A resin layer 13 is applied on the finger electrode 12, and a screen electrode 14 is formed on the resin layer 13 so as to cover all the intersections between the line electrode 10 and the finger electrode 12. Fine openings 13a and 14a are formed in the resin insulation 8N1s and the screen electrode 14 at positions facing the holes 12a formed in the finger electrode 12, respectively.

As shown in FIG. 2, the line electrodes 10 and finger electrodes 12 are extended to the periphery of the substrate 8, and electrical contact portions are formed. Configure.

An AC ffi source 16 is connected between each line electrode IO and the finger electrode 12 via a switch 15.

This AC power source generates a high frequency high voltage having a frequency of, for example, I MHz and an amplitude of several thousand volts (for example, 2500 volts). Therefore switch 1
5 is closed, a discharge occurs between the line electrode lO and the finger fi%12, and the air in the vicinity is ionized. On the other hand, each finger electrode 12 and the screen EIl! i14
A switch 17 and a DC vl? ! i,
The 18 series circuits and the DC power supply 19 are connected to each other. When the switch 17 is on the contact 17a side, the finger electrode 12 is at ground potential, and the screen electrode 14 is applied with a negative voltage. Therefore, the potential gradient is from the finger electrode 12 to the screen 1! The negative ions heading towards the pole 14 therefore remain in the vicinity of the screen electrode 14 and are not accelerated towards the dielectric drum 1. On the other hand, when the switch 17 is switched to the contact 17b side, a negative voltage is applied to the finger electrode 12. Here, the voltages V18, J: and V2O of the DC power supplies 18 and 19 are 1V181>
If it is set to 1V191, the potential of the screen electrode 14 will be lower than the potential of the finger electrode, so the potential gradient will move from the screen il@i14 to the finger electrode 12. Therefore, negative ions are accelerated by this potential gradient and are projected onto the dielectric drum 1 through the opening 14a. In this way, a one-dot electrostatic charge image is formed on the dielectric surface layer lb of the dielectric drum 1. Therefore switches 15 and 1
7 is composed of a semiconductor switching element, which is turned on and off according to the image signal supplied from the image signal generation circuit 7 (FIG. 1), thereby changing i[ to the body surface layer lb.
An electrostatic charge image corresponding to the image can be formed thereon.

Since such an ion flow generating device is configured in a cartridge type, it will also be referred to as an ion cartridge hereinafter.

As shown in FIG.
The electrostatic charge image formed on the electric drum 1 is then transferred to a developing device?
: t 8 , and this developing device uses a one-component conductive magnetic developing toner. The toner image thus formed is then transferred and fixed onto the recording paper 21 by the transfer/fixing device 4. The recording paper 21 is stored in the sumo wrestler kit 22, separated and taken out one by one by a separation roller 23, and conveyed between the dielectric roller 1 and the transfer/fixing roller 25 by a paper feed roller 24. The transfer/fixing roller 25 is constituted by a hard roller with high mechanical strength, and is pressed against the dielectric drum 1 with a considerably large force. Therefore, the toner image on the dielectric drum 1 is transferred onto the recording paper 21 and fixed under pressure.

The recording paper 21 on which the image has been recorded in this way is placed in the tray 2.
6 is discharged on top.

On the other hand, the toner remaining on the dielectric drum 1 is removed from the dielectric drum 1 by a toner removing device 5 consisting of a cleaning blade, and the static charge on the E-body drum 1 is removed by a static eliminator 6, and new static Prepare for the formation of a charge image. In this way, an image can be formed on the recording paper 21.

In the present invention, in the recording apparatus described above, the ion cartridge 2 is mounted movably in the axial direction of the dielectric drum 1, and dust is attracted to the moving path so as to come into contact with the ion emitting surface of the ion cartridge 2. A means is provided to remove dust attached to the surface of the ion cartridge 2.

Next, the configuration of this dust g&addressing means will be explained.

4 and 5 show in detail the ion cartridge 2 and dust adsorption means 80 of the recording apparatus shown in FIG. 1. In this example, the dust suction means 30 is constituted by a suction roller such as a sponge having an elastic roller 81 and an adhesive tape 32 provided on the outer peripheral surface thereof. This suction roller 30 is rotatably pivoted to a shaft 38, this shaft 33 is implanted in a support block 84, and this support block is fixed to a positioning member 35.

The positioning member 35 has a U-shaped shape, and the upper surfaces 35a and a5b of its legs position the lower surface of the ion cartridge 2, that is, the ion emitting surface, and connect the ion emitting surface and the dielectric drum l. For example, set the gap between 0.
Precisely maintain the predetermined value of 2tmpr.

As clearly shown in FIG. 4, the p-mark dust 9 and the roller 3o are located outside the IT body drum 1, and in a free state, the upper surface of the roller 3o is lower than the ion emitting surface of the ion cartridge 2. Provided so as to protrude slightly upward. On the other hand, several grooves 2a are formed on the upper surface of the ion cartridge 2 to increase mechanical strength and prevent warping. In addition, guides n*2b are formed on both sides, and are fitted with support members 86 #37 provided on both side edges, so that the ion cartridge 2 is mounted on the dielectric drum 1 as shown by the double arrow B.
M in the axial direction of
Wd>Freely. Therefore, when the ion cartridge 2 is inserted into and removed from the support members 86 and 87, the ion emitting surface of the ion cartridge 2 comes into EE contact with the roller 3°, and the roller 8o rotates while being elastically deformed. Due to this contact, the dust adhering to the ion discharge surface of the ion cartridge 2 is adsorbed to the adhesive tape 32, and the ion discharge surface becomes clean. In this way, the ion cartridge 2
Since the dust adhering to the ion emitting surface is removed by adhesion to the adhesive tape 32 each time the ion emitting surface is inserted or removed, there is less risk of dust adhering to the ion emitting opening, and good recording can be maintained for a long period of time. can.

FIG. 6 shows another actual K%J of the recording apparatus according to the present invention. In this example, a shielding member 40 is attached to the ion emitting surface side of the ion cartridge 2, and an adsorption roller aO is provided so as to come into contact with the lower surface of this shielding member. This suction roller is an elastic roller 81 as shown in FIGS. 4 and 5.
It has a configuration in which an adhesive tape 82 is wound around the outer peripheral surface of the holder. In this example, since the shielding member 40 is provided, the possibility that dirty air containing dust will enter between the ion cartridge 2 and the dielectric drum 1 due to the rotation of the dielectric drum 1 is reduced, and the shielding member 40 is also provided. When the airflow passes through the narrow gap between the member 40 and the dielectric drum 1, there is a greater possibility that dust will adhere to the lower surface of the shielding member 40, and by inserting and removing the ion cartridge 2, the shielding Since the dust adhering to the lower surface of the member 40 can be removed by suction, the dust removal action can be performed satisfactorily. In this embodiment, the shielding member 40 is provided only on the upstream side when viewed in the rotation direction of the dielectric drum 1, but a similar shielding member is also provided on the downstream side, and a separate shielding member that comes into contact with the lower surface of this shielding member is also provided on the downstream side. A suction roller can also be provided. Moreover, in this case, it is also possible to provide - number of elongated suction rollers and make them contact with the lower surfaces of both shielding members.

FIG. 7 shows still another embodiment of the recording apparatus of the present invention. In this example, a dust suction roller 80'f shaft 8 is constructed by winding an adhesive tape 82 around the outer peripheral surface of an elastic roller 31.
8 so as to be rotatable, and a screw 41 prevents it from falling off the shaft.

In this example, such a suction roller 80 is arranged so as to come into contact with the ion emission opening 2C of the ion cartridge 2. Therefore, when the ion cartridge 2 supported by the support members 36 and 37 is inserted or removed in the axial direction of the dielectric drum, the ion emission opening 2C of the ion cartridge
The recording section including the
Dust attached to this recording section can be removed by suction.

The present invention is not limited to the embodiments described above, and can be modified and modified in many ways. For example, in the embodiment described above, the adhesive tape was used to adsorb and remove the dust adhering to the ion cartridge, but it is also possible to adsorb and remove the dust adhering to the ion cartridge using electrostatic adsorption means or magnetic adsorption means. You can also do it. In this case, it is not necessary to bring the suction means into contact with the recording section, and it is sufficient to arrange them facing each other. Furthermore, in the above embodiment, the recording device uses an ion current generator and a dielectric drum, but it is of course applicable to other formats, such as a recording device using a multi-needle electrode or a recording device using an optical fiber array. It is.

(Effects of the Invention) As described above, according to the present invention, the recording head is provided so as to be freely inserted into and removed from the recording member, and the dust suction means is provided in the insertion/removal passage facing the recording member of the recording head. Dust adhering to the surface of the recording head can be effectively adsorbed and removed each time the recording head is inserted or removed, and the recording head can be kept in a clean state at all times, thus ensuring good recording over long distances. can be done.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the overall configuration of an embodiment of the recording device of the present invention, FIGS. 2 and 3 are a plan view and a sectional view showing the configuration of the ion flow generating device, FIG. 5 is a perspective view and a cross-sectional view showing the configuration of one embodiment of the dust suction means, and FIGS. 1...kHz body drum...Ion current generator ε (ion cartridge) 8
...Present (8!Installationffi 4...Transfer/Fixing length P"6...Excluding installation, 30.
...Dust adsorption roller 81...Elastic roller 32
... Adhesive tape 36.37 ... Supporting films
40... Shielding member Fig. 2 Fig. 3

Claims (1)

[Claims] 1. In a recording apparatus in which a recording head configured by arranging recording sections that perform recording in pixel units is arranged facing a recording member, the recording head is configured to be movable in the arrangement direction of the recording sections, and the recording head A recording head characterized in that a means for adsorbing and removing dust adhering to the recording head is provided in the movement path of the recording head, facing the recording head.