JPS59228685A - Toner cleaning device of magnetic recording device - Google Patents

Abstract

PURPOSE:To reduce a shape in size and improve operativity by providing an endless rotating belt which receives toner from on a rotating drum, a magnetic attracting means which attracts residual toner on the rotating drum to the rotating belt, and a means which separates toner from the rotating belt at a prescribed position. CONSTITUTION:When the drum 100 rotates as shown by an arrow (a) and a magnet roll 12 rotates as shown by an arrow (b), toner containing particles of magnetic material while chained by magnetic force generated by the magnet roll 12 is carried by being attracted to the surface of the rotating belt 13 which runs as shown by an arrow (c) within a range (y) where the magnetic force extends. When this attracted toner 6 is carried away from the magnet roll 12 at distance (y), the attracting force decreases abruptly, and the majority of the toner falls on a toner receiving box 16. Toner 7 caught in the texture of the rotating belt 13 also falls on the toner receiving box 16 by beating the reverse surface of the rotating belt 13 with blades 14a through the rotation of a vibrating roller 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a cleaning mechanism for removing residual toner in a printer using a magnetic recording method.

(b) Background of the Technology In recent years, as so-called OA equipment has significantly developed and become widespread in the market, various improvements in performance have been required of printers as peripheral equipment thereof, particularly magnetic recording devices.

And since performance includes items such as size, weight, and frequency of maintenance, there is a strong demand for magnetic recording devices that are small, lightweight, and easy to maintain. .

FIG. 1 is a principle diagram showing the operation of this magnetic recording device.
r-FesOs) coating film (hereinafter simply referred to as the medium) is coated thereon.If the drum 100 now rotates in the direction of arrow A, the degaussing head 81 constituting the unit 40 will be The latent image formed on the medium 1 is then erased. The latent image forming head 32 forms a new latent image on the magnetic recording medium l. This formed latent image advances to the developing machine 33 as the drum 100 rotates in the direction of arrow A. Inside the developing machine 88, carbon and resin are formed around minute iron particles. Contains covered toner 6.

When the magnetic latent passes through the developing device 33, the toner is transferred to the medium 1 in the shape of the latent image due to the magnetic force of the latent image.
The toner 6a deposited on the medium 1 in accordance with the shape of this latent image further reaches the transfer section 84 by rotation of the drum.

Here, the paper 87& is running in the direction of the arrow, and in the transfer section 34, the toner is pressure-transferred onto the surface of the paper by a roller (not shown). By doing this, most of the toner 6a arranged according to the shape of the latent image is pressed onto the surface of the paper 37, so that characters and letters corresponding to the electrical signals sent to the coil of the latent image forming head are formed on the surface of the paper 37. A shape will be drawn. For this reason, most of the toner 6a is transferred onto the paper 87b flowing out of the transfer section in the convex direction of the arrow.
Only a latent image remains on the surface of the medium 1 after leaving the transfer section 34, and this latent image is sent in the two directions of the arrows.

If the drum continues to rotate 1,000 times without stopping, the latent image will quickly reach the degaussing head and will pass the latent image forming head, but in this case, the demagnetizing head and the latent image forming head will not work. If this is done, the latent image on the medium 1 will remain as it is, and the toner 6 will be applied again in the developing section 88 and the medium will pass through the transfer section 34.

By repeating this process, you can obtain as many sheets of the same characters and figures as you want on the paper 87b.

However, if the degaussing head and the latent image forming head are operated here, another latent image will be formed on the medium 1, so new characters different from the previous ones will appear on the paper 87b that has left the transfer section 84. and shapes will be drawn.

The operating principle of the magnetic recording device has been briefly described above, but in reality, residual toner 6b remaining without being transferred remains on the area indicated as A on the medium l after leaving the transfer section 34. There is even. If this residual toner 6b is left as it is, the characters and figures obtained will usually be significantly damaged, whether in the case of copying as described above or in the case of drawing new figures.

Therefore, in order to avoid such adverse effects, a cleaning section 86 is generally disposed in front of the erasing head to remove the residual toner 6b and clean the surface of the medium 1.

(C) Prior Art and Problems A first example of a conventional toner cleaning device is shown in FIG. That is, in order to remove the residual toner 6b on the medium 1, a flexible woven fabric m is used.
A rotary brush 50 with raised bristles 8 is rotated in the direction of the small arrow, and air is evacuated in the direction of the arrow through the flow air passage 89 by a vacuum system (not shown) in order to take the residual toner 6b into the filter 5. It is designed to let you do so. However, 2 is a blade disposed within the cleaning device to scrape off the residual toner 6b, and 7 represents the residual toner trapped within the filter 5.

A second example of a conventional cleaning device is shown in FIG. 8, the main parts of which are shown.

In other words, the tape-shaped cleaning material 28 is run in the direction of arrow H, and the surface of the medium 1 is rubbed to wipe off the residual toner 6b on the medium 1 with the cleaning material between the cleaning roller 8 and the take-up reroller 10. This is how it is removed.

Here, 9 indicates a cleaning material delivery roll, arrow ``nu'' indicates the direction in which the force that presses the cleaning roller toward the medium of the drum 100 is applied, and 6C indicates the residual toner wiped off onto the cleaning material.

In the cleaning device shown in this second example, once the cleaning material is attached, a fairly long cleaning material is used so that it is not necessary to change the cleaning material again for as long as possible. In this case, the feed roller 9, the take-up roller 10, etc. must be constructed of large size, and therefore the entire cleaning device 86 necessarily becomes large. Moreover, the cleaning material needs to be replaced periodically, making maintenance less easy.

That is, the conventional type shown in FIGS. 2 and 8 inevitably increases the size of the device.

(d) Object of the Invention The object of the present invention was made in view of the above-mentioned drawbacks of the conventional art, and it is an object of the present invention to provide a toner cleaning device that is small in size and has good operability.

(e) Structure and object of the invention According to the present invention, a magnetic recording device is provided in which a latent image forming section, a developing means, a transfer means, and a cleaning means are sequentially arranged in the rotational direction of a rotating drum having a magnetic recording medium on its surface. In the apparatus, the cleaning means includes an endless rotating belt that receives and receives toner on the rotating drum by bringing a part of its surface into contact with the rotating drum, and is located on the back surface of this rotating belt, and is located on the back surface of the rotating belt, and the cleaning means is located on the back side of the rotating belt, and the cleaning means is located on the back side of the rotating belt, and is arranged on the back surface of the rotating belt, and the cleaning means is located on the back side of the rotating belt. A toner cleaning device for a magnetic recording device, comprising: a magnetic attraction means for attracting residual toner on a drum to a rotating belt; and a means for peeling off the toner attracted to the rotating belt from the rotating belt at a predetermined position. achieved by.

(Embodiments of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 4 is a perspective view showing the toner cleaning device according to the present invention, and FIG. 5 is a perspective view showing the detailed structure around the magnet roll 12 in FIG.

4 and 5, the magnetic roll 12 has N, 8. N.8. It has a plurality of magnetic poles arranged alternately, and can rotate within a non-magnetic sleeve 11. The outside of the sleeve 11(2) is lined with an elastic member (for example, rubber or sponge) 11'.
The outer periphery of the magnet roll 12 and the elastic member 11
The distance from the outer periphery of 1 mm or, for example, about 1 mm is set.

An endless rotating belt is connected between the first roller 50, that is, the magnetic adsorption means, mainly composed of the magnet roll shown in FIG. 5, and the second roller 15 shown in FIG. 13 is stretched across, and the above 2
For example, a location located between two rollers 50 and 15,
That is, a vibrating roller 14 having, for example, blades 14a radially extending around its circumference is arranged at a location corresponding to the back surface of the rotating belt, and when the vibrating roller 14 rotates, the vibrating roller 14 knocks out the rotating belt 13. It works like this.

Now, when the drum 100 rotates in the two directions of the arrow and the magnet roll 12 rotates in one direction of the arrow, the toner 6 having magnetic particles inside becomes chained due to the effect of the magnetic force generated by the magnet roll 12. In the range covered by the magnetic force, that is, within the range indicated by y in FIG. 4, it is attracted to the surface of the rotating belt 13 running in the direction of the arrow, and is also carried in the direction of the arrow. However, if this attracted toner 6 is separated from the magnet roll by a distance of y, the magnetic attraction force is inversely proportional to the square of the distance, so the attraction force decreases rapidly, and most of the toner is rotated. The toner receiver falls off the edge of the belt 130 and onto the box 16. However, there is some toner stuck in the weave of the rotating belt. Such toner is knocked off the toner tray onto the box 16 by the rotation of the vibrating roller 14, that is, the peeling means, as the blade 14B knocks off the rotating belt from the back side. What is shown as 7 in FIG. 4 shows the toner that accumulates on the toner receiving box through this process.

In FIG. 6, the rotation speed n of the magnet roll 12 is plotted on the horizontal axis, and the distance X shown in FIG. 5 and the distance y shown in FIG.
This is a relationship diagram drawn with both of them as vertical axes, and this diagram is drawn for the case where the magnetic flux density of the magnet roll 12 is 550 Gauss.

As is clear from this figure, if the distance X previously drawn in Figure 5 is less than 1.5 mm, the latent image on the medium 1 will be destroyed, and if the rotation speed r1 is 50 Orpm. For example, when the distance y becomes 2.5F71F71 or more, the magnetic force from the magnet roll 12 is lost and the attracted toner falls from the surface of the rotating belt. Therefore, when actually configuring this cleaning device, the distance X is set to the value shown as A in the direction of the diagonally shaded area in FIG. It is recommended to set it to the value shown as B in .

(g) Effects of the Invention The toner cleaning device for the magnetic recording device according to the present invention will be explained in detail. As described above, the toner cleaning device of the magnetic recording device according to the present invention does not include a vacuum system and does not require a cleaning material delivery roller or take-up roller. Since it can be made small and lightweight, great practical effects can be expected.

[Brief explanation of the drawing]

FIG. 1 is a principle diagram showing the operation of a magnetic recording device, FIGS. 2 and 3 are diagrams showing a conventional toner cleaning device, and FIG. 4 is a perspective view showing the structure of a toner cleaning device according to the present invention. FIG. 5 is a diagram that clearly shows the structure of the first roller in particular, and FIG. 6 is a diagram that shows the relationship between the distances x and y with respect to the number of rotations of the magnet roll. In the drawings, 1 is a magnetic recording medium, 6.7 is a toner, and 12 is a magnetic recording medium.
18 is a rotating belt, 14B is a blade of the vibrating roller 14, 15 is a 20th roller, and 16 is a toner tray. Fig. 1 6 Fig. 2 Fig. 3 Fig. 4 ■ Fig. 5 Suigin Fig. 6 Fig. 77゛° non-outer roll concave rotation number n (rρm) 5

Claims (1)

[Claims] In the direction of rotation of a rotating drum having a magnetic recording medium on its surface,
In a magnetic recording device in which a latent image forming section, a developing means, a transfer means, and a cleaning means are sequentially arranged, the cleaning means brings a part of the surface into contact with the rotating drum to receive and receive the toner on the rotating drum. an endless rotating belt; a magnetic attraction means located on the back side of the rotating belt, which uses magnetic attraction force to attract the residual toner on the rotating drum to the rotating belt; 1. A toner cleaning device for a magnetic recording load, comprising means for peeling off the toner from a rotating belt.