JPS5936271A - Conveyance device for solid-state particle - Google Patents

Abstract

PURPOSE:To convey solid-state particles in a small and uniform thickness on a vibrating board which is formed by providing a dielectric layer on the conductor plate by vibrating the vibrating plate to left and right, and applying voltages having the opposite polarities to the conductor plate at intervals of vibrations. CONSTITUTION:When solid-state particles 4 are placed on the surface of the vibrating plate 3 formed by providing the dielectric layer 2 on the conductor plate 1 and this is vibrated as shown by the arrow A, the particles 4 stop at their original positions by inertia and move to right relatively to the vibrating plate 3 to be electrified by friction. When they are electrified positively, the plate 3 is then vibrated as shown by the arrow B and a negative voltage is applied to the conductor plate 1, so that the particles 4 move as shown by the arrow B while attracted by the plate 1. When the plate 1 is applied with a positive voltage and vibrated as shown by the arrow A, the particle 4 floats and stays there. This vibration is repeated to carry the particles 4 on the plate 3 with a thin and uniform thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for conveying solid particles on the surface of a plate-shaped member such as a flat plate, belt, or drum.

A device that transports solid particles by placing them on a plate-like member is
For example, it has a wide range of uses, such as when transporting developed toner in a copying machine. Conventionally, the transport device used was a belt conveyor, or solid particles made of magnetic material were transferred onto a non-magnetic plate. A device has been used in which solid particles are transported by the movement of a permanent magnet placed on the non-magnetic material and brought into sliding contact with the lower surface of the non-magnetic material. In order for the solid particles to be conveyed to be conveyed with a uniform thickness in any of the above-mentioned devices, it is necessary to use a trimmer to make them as uniform as possible. In some cases, the thickness of the solid particles has to be increased to a certain extent.

However, in a toner conveying device such as an electronic copying machine, the toner is electrically charged in order to uniformly adhere the conveyed toner to an electrostatic latent image on a photoreceptor, and moreover, the toner is charged to a thin and uniform thickness on a plate-like member. There is a demand for a device that can place and transport a product, but as mentioned above, it has been difficult to meet this demand with conventional transport devices.

The present invention has been made in response to the above-mentioned needs, and includes vibrating a diaphragm comprising a rice grain electric layer on a conductive plate in a plane direction, and a polarity of the conductive plate for each vibration. An object of the present invention is to provide a solid particle conveying device in which the solid particles are charged and moved on the surface of a dielectric layer by applying different voltages and bringing the solid particles into contact with the applied voltages.

The present invention will be explained in detail below based on the drawings.

Figure 1 is a conceptual diagram explaining the principle of solid particle transport according to the present invention. First, as shown in Figure (a), a conductive plate l is
When solid particles 4 are placed on the optical surface of the dielectric layer 2 of the diaphragm 3, which is made by providing a conductor M2 on soil, and the diaphragm 3 is vibrated in the direction of the arrow, as shown in FIG. , the solid particles 4 remain at their original positions due to inertia, and move to the right in the figure relative to the diaphragm 3. At the same time, the solid particles 4 are charged by friction with the dielectric layer 2, but in this case, depending on the combination of the materials of the cod electric layer 2 and the solid particles 4, the solid particles 4 can be charged positively or negatively. sell.

Assuming that the particles are positively charged, as shown in FIG. The positively charged solid particles 4 are attracted to the conductor plate 1 by the attractive force of the coolant and move along the conductor plate 1 in the direction of arrow B. Next, as shown in FIG. 4(d), when a positive voltage is applied to the conductor plate l and the diaphragm 3 is again vibrated in the direction of the arrow A, the solid particles 4 are caused by the contact pressure with the diaphragm. becomes minimum or floats up and stays in that position due to inertia.

By repeating the above steps, the solid particles 4 placed on the diaphragm are transported on the surface of the U electric layer 2 in the -1 right direction in the figure.

In the above, considering the conditions for solid particles to move, the J91 friction number between the particle and the dielectric layer is μ, the quality of the particle is m, the power acceleration is I, and the particle impeller [1tZ] , the average electric field strength between the particle and the conductive plate is E, the van der Waals force between the particle and the dielectric layer is ω, and the vibration acceleration in the right direction is α, then the solid particle follows the vibration of the dielectric layer. The conditions for this are ζ, as long as μ(穆+zE+ω)>mα is satisfied.

Next, the conditions for the solid particle to stop at that position (the state shown in Figure 1 d) are as follows: If the vibration acceleration in the left direction is l, then if the following equation is satisfied: It will be a good thing.

Next, the diaphragm 3 is vibrated in the plane direction as described above.

FIG. 2 shows an example of a configuration for applying voltages of different polarities to the conductor plate 1 of the vibration 113 for each vibration. That is, a permanent magnet 6 is attached to one end of a diaphragm 3 on which an IWlt body layer 2 is attached on a conductor plate 1 via a vibration transmission member 5.
An electromagnet 7 is provided with a small gap between the permanent magnets, and an AC power source is connected to the electromagnets 7.

The AC power source is also connected to the conductor 1 and ground. With this configuration, the electromagnet 7
When the permanent magnet 6 is attracted and the diaphragm 3 is vibrated to the left in the figure, one of the positive and negative voltages is applied to the conductor 1, and the polarity of the electromagnet is changed, causing the diaphragm 3 to vibrate to the left in the figure. When the conductor l is vibrated to the right, positive or negative voltages opposite to those described above are alternately applied to the conductor l, so it is placed on the dielectric layer 2 according to the principle explained in FIG. Alternatively, the solid particles 4 brought into contact are transported to one of the optical surfaces of the dielectric layer 2.

Regarding the materials of the U-electroconductor layer 2 and the solid particles 4 to be transported, it is convenient for the -electroconductor layer to be made of a material with high electrical resistance, such as nylon. On the other hand, the solid particles to be conveyed are preferably made of polyester, acrylic, or a mixture thereof, which has a high electrical resistance. In this case, whether the solid particles are positively charged or negatively charged is determined by the combination of materials of the solid particles and the dielectric layer.

By the way, if a material whose solid particles have a volume resistivity of 1OΩ-α or more is selected, the dielectric layer can be removed to serve as the conductor 1.

Since the present invention is configured and operates as described in 5 above, the solid particles placed on or in contact with the diaphragm 3 are charged and then conveyed on the diaphragm 3 with a thin and uniform thickness. be able to. Moreover, when the electromagnet is used, the conveyance direction can be easily changed by reversing its phase. It is also possible to transport the solid particles in an uphill direction by tilting the diaphragm at a desired angle instead of horizontally. Considering the conditions for this, in order to transport solid particles in an uphill direction by tilting the diaphragm by an angle e with respect to the horizontal plane, μ(M9CO5θ+zE +trr) > tn (
(Also, the conditions for the particle to stop at that position are: E/sinθ<β and m9 CO5θ−zE+ω≦O or j!sinθ<β and μ It is good if (R9ωSθ−zE+ω)<m(β−5inθ).

Of course, the present invention is based on the above embodiment K P! Needless to say, there is no need for it to be specified.

For example, the shape of the diaphragm is not limited to a flat plate, but may also be a curved surface such as a drum shape, depending on the application. Moreover, since it can be conveyed with a uniform thickness, iFK is not only ideal as a conveying device for developing toner in electronic copying machines, but also as a conveying device for mixing chemicals, pigments, etc. in an accurate desired ratio. It is expected to have a wide range of uses.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram for explaining the principle of transporting solid particles according to the present invention, and the two figures are configuration diagrams showing an example of applying pressure and vibration to a diaphragm. In the figure, 1... conductor 2... current visitor layer 3...
・Vibration plate 4...Solid particles 6...Permanent magnet
7...Electromagnet 8...AC power supply Applicant: Fuji Xerox Co., Ltd.

Claims (1)

[Claims] The surface of the conductive layer is vibrated in the plane direction by vibrating a diaphragm comprising a four-sided electric conductor plate and a voltage having a different polarity is applied to the conductive plate for each vibration. A conveying device for solid particles, wherein the solid particles brought into contact with are frictionally charged and moved on the surface of the electrolyte layer.