JPH0685996A - Paper feed device - Google Patents

Abstract

PURPOSE:To make the entire device inexpensive and compact. CONSTITUTION:A drive roller 1 is supported in a way of freely turning with moving levers 2A, 2B and moved by turning upward and downward. A main gear 4 meshes with a drive gear 3 at a downward turning end to turn the drive roller 1, reception use paper is inserted between the roller 1 and a follower roller and then the paper is fed. The main gear 4 meshes with the drive gear 3 via a sub gear 5 at an upward turning end, the drive roller 1 is reversed, a transmission original is inserted between the roller 1 and a follower roller and fed. One drive roller 1 is enough for the purpose, then the installation space is made small, the drive circuit or the like is simplified and the device itself is made inexpensive and compact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device for feeding paper.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a paper feeding device which has been widely used in conventional facsimiles and the like. The paper feeding device is provided with a pair of paper feeding rollers 8 and 9 at the upper and lower positions, and the transmission original S1 is nipped and conveyed between the upper paper feeding rollers 8.
The receiving sheet S2 is nipped and conveyed between the lower sheet feeding rollers 9. Each of the paper feed rollers 8 and 9 is composed of drive rollers 81 and 91 that are connected to a drive source and rotate, and driven rollers 82 and 92 that face the paper and sandwich the paper.

[0003]

However, in the above-mentioned conventional structure, the drive rollers 8 are respectively provided to the paper feed rollers 8 and 9.
1, 91 are provided, a relatively large space for accommodating them is required and the drive rollers 81, 91 are provided.
For example, a dedicated motor is provided for the drive circuit and the drive mechanism, and the cost is increased. On the other hand, in a facsimile or the like, there is a fact that the transmission original and the reception paper are not simultaneously conveyed.

The present invention has been made in view of the above background, and an object of the present invention is to provide a paper feeding apparatus which requires a small installation space, has a simple drive circuit and the like, and is inexpensive and compact as a whole. And

[0005]

The structure of the present invention will be described. A drive roller 1 and roller moving means 2A and 2B for rotatably supporting the drive roller 1 and moving and positioning the drive roller 1 in two positions. The drive roller 1 is connected at its one moving end to the rotary drive source 3 to rotate the first rotation transmitting means 4, and the other moving end of the drive roller 1 is connected to the rotary drive source 3 to rotate it. A first driven roller 6 for sandwiching the paper S1 between the second rotation transmitting means 4 and 5 and the driving roller 1 and feeding the paper S1 with the driving roller 1 and the other moving end for driving. Paper S between roller 1
It is provided with a second driven roller 7 which holds 2 and feeds it out.

[0006]

In the above structure, the drive roller 1 is moved so that the paper S1, S1 and
Hold S2 and send it out. Therefore, it suffices to provide one drive roller 1, the installation space is reduced, and the drive circuit and the like are simplified, so that the entire apparatus is inexpensive and compact.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 4, a paper feeding device is composed of one driving roller 1 and two driven rollers 6 and 7 which are vertically spaced apart from each other. The sending original S1 is sent by 6 and the receiving paper S2 is sent by the driving roller 1 and the driven roller 7.

The drive mechanism of the drive roller 1 will be described with reference to FIGS. 1 and 3. The left and right support plates 6A, 6B are provided with circular openings 61 in the upper part thereof, and these openings 61 are moved from the outside by the moving lever 2A. , 2B of circular convex portions 21 are rotatably fitted around the center O1. Each moving lever 2A, 2
B is composed of an arc half portion provided with the convex portion 21 and a long plate half portion extending laterally from the arc half portion, and the center O1 is formed in the arc half portion.
The through hole 22 is formed by penetrating the convex portion 21 at a position close to the outer periphery which is offset.
Is provided, and both end shaft portions 11 of the drive roller 1 are rotatably fitted in the through holes 22. Then, the driving roller 1 rotates about the center O2 which is deviated from the center O1.

A main gear 4 is screwed and fixed to a roller shaft portion 11 penetrating a through hole 22 of a moving lever 2A by a boss portion 41, and an auxiliary gear 5 meshes with the outer periphery of the main gear 4. There is. The sub gear 5 is rotatably fitted on the outer periphery of a cylinder pin 23 provided upright on the half of the long plate of the moving lever 2A, and is positioned by a headed screw 24 screwed into the cylinder.

Below the main gear 4, there is provided a drive gear 3 which is connected to a drive motor (not shown) to rotate, and the movable levers 2A and 2B connected to the document feed table (not shown) are rotated about the center O1. In the state of FIG. 1 in which the main gear 4 is tilted upwards,
Is rotated downward, meshes with the drive gear 3, and is rotated about the center O2. In this state, the drive roller 1 which is pivoted downward together comes into contact with the lower driven roller 7 as shown in FIG. 4 and rotates around the center O2 together with the main gear 4 to send out the sandwiched receiving sheet S2.

Both the moving levers 2 are operated by operating the document feed table.
When the A and 2B are tilted downward about the center O1 (FIG. 2), the main gear 4 pivots upward and disengages from the drive gear 3, and the sub gear 5 meshes with the drive gear 3 instead. Since the main gear 4 is rotated via the sub gear 5, the center O is rotated in the direction opposite to that at the time of the downward movement end.
Rotate around 2. In this state, the drive roller 1 is
As shown in FIG. 3, the driven original 6 comes into contact with the upper driven roller 6 and rotates together with the main gear 4 about the center O2 to send out the sandwiched transmission original S1 in the same direction as the reception paper S2.

In this way, the transmission original S1 and the reception paper S2 are efficiently conveyed by the single drive roller 1.
In this embodiment, since the sub gear 5 is interposed, the transmission document S1 and the reception sheet S2 can be sent in the same direction without reversing the drive gear 4.

In the above embodiment, a friction wheel or the like may be used as the rotation transmission means instead of the gear. Also,
If the drive roller and the motor are directly connected by a rotation cable or the like and the motor can be rotated in the forward and reverse directions, the drive roller 1 does not necessarily have to be pivotally moved, but may be linearly moved, for example.

[0014]

As described above, the paper feeding device of the present invention can convey two types of paper by a single driving roller.
It is possible to realize a compact device and a low price.

[Brief description of drawings]

FIG. 1 is a perspective view of a drive mechanism in a state in which a drive roller is at a lower turning end.

FIG. 2 is a perspective view of a drive mechanism in a state where a drive roller is at an upper turning end.

FIG. 3 is an exploded perspective view of a drive mechanism of a drive roller.

FIG. 4 is a schematic side view of the feeding device in a state where the drive roller is at the lower turning end.

FIG. 5 is a schematic side view of the feeding device in a state where the drive roller is at the upper turning end.

FIG. 6 is a schematic side view of a conventional feeding device.

[Explanation of symbols]

 1 Drive Rollers 2A, 2B Moving Lever (Roller Moving Means) 3 Drive Gear (Rotation Drive Source) 4 Main Gear (First and Second Rotation Transmission Means) 5 Sub Gear (Second Rotation Transmission Means) 6 First Driven roller 7 Second driven roller S1 Transmission original (paper) S2 Reception paper (paper)

Claims (1)

[Claims] 1. A drive roller, a roller holding means for rotatably supporting the drive roller and locating the drive roller by moving it to two positions, and one drive end of the drive roller is connected to a rotary drive source for rotation. The paper is formed between the first rotation transmitting means for causing the rotation, the second rotation transmitting means for connecting the rotation at the other moving end of the drive roller to the rotation drive source and causing the rotation, and the drive roller at the one moving end. A paper feed device comprising: a first driven roller that nips and feeds the paper; and a second driven roller that nips and feeds paper between the drive roller and the other moving end.