JPS5969330A - Paper feeder - Google Patents

Abstract

PURPOSE:To improve the accuracy in paper feed by arranging idlers in opposed state onto driving wheels on which an annular grooved stepped part is formed and an elastic body is annularly installed and allowing paper sheet to be interposed between the outer periphery of the driving wheel, elastic body, and the idler. CONSTITUTION:When idlers 6 supported through a shaft 3 are turned in A direction and a pressing force is applied by springs 5, said idler 6 deforms an elastic body 12 through a paper sheet 8 and applies pressing force onto the outer periphery of a driving wheel 2 and the elastic body 12. Therefore, if the driving wheel 2 is revolved through a shaft 1, the deformed part of the elastic body 12 shifts continuously in synchronization with the revolution of the outer periphery of the driving wheel 2, and feeds-out the paper sheet, keeping the paper sheet in the state put between the driving wheels 2 and the idlers 6. When the idlers 6 are turned in B direction, the pressing force is removed, and the paper sheet can be inserted freely. With such constitution, the accuracy in paper feed can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a paper feeding device with excellent paper feeding accuracy.

17E As shown in Fig. 4, this htj device is a cylindrical drive wheel 50 whose outer edge is made of rubber blue elastic material.
It was designed to hold 52 pieces of paper and rotate 50 drive wheels to feed the paper between the idler wheel 51 and the idler wheel 51 placed in front of it.

〃) In the conventional paper feeding device that uses a furnace, there is an i'! between the drive wheel and the paper. ! In order to prevent this, a strong pressure force t4 is applied to the idler wheel.
If this happens, the outer periphery of the driving wind may become deformed, resulting in a decrease in paper feeding accuracy. In addition, when there are multiple drive wheels, it is difficult to make their outer diameters, hardness, and grooves uniform. It was often the cause.

The present invention has been made in view of the above-mentioned actual situation, and has the purpose of providing a paper feeding device that is simple and has excellent paper feeding accuracy.

According to the present invention, an elastic material having a diameter slightly smaller than the outside diameter J of the driving wheel is mounted on the stepped portion carved on the outer periphery of the driving wheel,
The idle car plays with paper and drives! It is arranged so that it is pressed against the outer diameter of the IJ wheel and the elastic member, and the drive wheel and idler wheel are connected to each other.
It is characterized by clamping pressure and pressure feeding.

The present invention will be described in detail below with reference to illustrated figures.

FIG. 1 is a perspective view of the paper feeding V device according to the invention r01
It is a shaft that applies rotational force from a μ drive wJJ source (not shown), and a drive wheel 2 is disposed on this lll1h at least once and is locked so that it rotates in synchronization with the There is.

12is, an elastic body attached to the drive wheel 2 is shown. 'Iq
In 1lill 3 parallel to II 1, a U-shaped member 4 is arranged in the 1st section opposite to the drive wheel, and an idler wheel 6 is mounted on the shaft 7 at the open end. There is. !
When rotated by a certain angle in the direction of the arrow 3, the idler 6 is pressed against the driving wheel 2 by the spring 5, and conversely, 1
113f When rotated by a certain angle in the direction of arrow B, the idler wheel 6 is separated from the drive wheel 2, allowing the paper 8 to be freely inserted and removed.

FIG. 2 is a sectional view of the drive wheel. This is a step portion marked on the outer circumference 10 of 11 μm, and an elastic body 12 having a diameter just λ smaller than the outer diameter of the outer circumference 10 is encased here.

FIG. 3 is an explanatory view of the paper clamping pressure part, in which (a) shows a cross section of the paper clamping pressure part along the μ axis, and (b) shows a side view. Drive vehicle 2
When there is 8 between the idler wheel 60 and the idler wheel 60, the driving wheel 2 is placed on the idler 6.
When a pressing force is applied to the elastic body 12, the play element 6 deforms the elastic body 12 through the ridges, and finally applies a soil layer force to the outer periphery 10 and the elastic body. At the time of rolling, the elastic body at the portion in contact with the paper 8 has a diameter equal to the outer circumference 1o, and this does not change the sufficient rigidity of the drive wheel even if the pressing force applied to the idler wheel becomes even thicker. Here, a driving source (not shown) is inserted through shaft 1.
When the Lv rotational force is transferred to the drive wheel, the deformed portion of the elastic body 12 moves continuously in synchronization with the rotation of the outer periphery 10, and the repulsive force accumulated by this deformation is transferred to the drive wheel 2. Generate sufficient frictional force to try to lock the paper 8 and drive wheel 2.
It works like a feeder at the outer circumference 1o. In this way, regardless of the magnitude of the pressing force of the idler wheel 6 and the outer diameter and hardness of the elastic body 12, it is possible to realize paper feeding 1 with excellent stacking density. In this figure, the beam body has a solid rectangular cross-sectional shape, but the shape is of course not limited to this.

According to the present invention, in order to solve the gills explained above, the step part is formed on the outer periphery of the drive wheel on the ring side, and the outer periphery diameter is made into an elastic body with a diameter of ≧ ≧. It is suitable for paper tray pressure feeding using an idle wheel, and it is possible to realize simple yet excellent paper feeding, so it is suitable for paper feeding devices necessary for printers, plotters, and T1 Kozue IW. If this device is used, there are many advantages such as cost reduction and improvement in paper feed speed.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the paper feeding device according to the present invention, Fig. 2 is a diagram of the drive wheel, Fig. 3 is an explanatory diagram of the paper clamp pressure section, and Fig. 4 is a conceptual diagram of the conventional paper feeding device. be. 2... Drive wheel 6... Idle wheel 10... Outside 1? il' 1...Step part 12...I
Applicant, Epson Corporation Figure 1 0 Figure 2

Claims (1)

[Claims] Directly on the paper feeding device, which has a drive wheel connected to a drive source and has at least 111M of drive wheels and an idler wheel is disposed at a position opposite to the drive wheel, at least one step is carved on the outer periphery of the drive wheel. , the outer diameter of the drive wheel is not less than the outer diameter of the drive wheel, and the outer diameter of the drive wheel is fitted with a flexible body ring, and a paper cage is attached at the position where the idler wheel engages the outer diameter of the drive wheel and the elastic member through the paper r. A paper feeding device characterized by high pressure feeding.