JPS58148131A - Automatic paper-feed mechanism - Google Patents

Abstract

PURPOSE:To feed a manuscript stably to a paper-feed section by providing an auxiliary roller mechanism with a roller, which is driven by an output from a means detecting the presence of the manuscript and moved vertically and turned. CONSTITUTION:In the automatic paper-feed mechanism in which a plurality of manuscripts 16 stacked are fed one by one in succession from the one an uppermost section, the auxiliary roller mechanism with the roller 7, which falls to a lower position from an upper position by signals from detecting elements 13a, 13b detecting the presence of the manuscripts 16 and is in contact with the upper surface of the manuscript in the uppermost section while being rotated, is set up. That is, the manuscripts can be fed stably to the paper-feed section even when the angle of inclination of a manuscript base plate 15 is small, and troubles, such as initial empty feeding, empty feeding on its way, etc. can be removed. Since the angle of inclination of the base plate 15 can be reduced, the degree of freedom increases in the arrangement and constitution of the automatic paper-feed mechanism, and a device can be miniaturized or the device excellent in a design cab be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides for a facsimile or similar device to
This invention relates to an automatic paper feeding system 411 that feeds sheets one by one starting from the topmost original of a stack of several originals.

In recent years, with the demand for more efficient and labor-saving office work, 7Axi IV devices have come into widespread use, and are now being used in a variety of ways.
became. Along with this, there has been a desire for the φ-shape of the flip-shield device, improvements in AS characteristics, and other functions, and there has also been an increase in various requests for designs that take operability, reliability, etc. into consideration in order to make it more widespread. In order to realize these demands for facsimile machines, various studies have been made in order to maintain the functionality and reliability of the facsimile machine.An example of this is an automatic paper feed mechanism.

As is well known, an automatic paper feeding mechanism includes a document mounting table on which a document is set and a paper feeding section that feeds the document one sheet at a time. Conventionally,
This document mounting table is 30° to 45° relative to the horizontal position.
By providing this inclination, the document slides down naturally on the document loading table, and when it is moved to the paper feeding section, the document is fed smoothly.

In this way, set the inclination angle of the manuscript table to 30@~45@[
As a result, there was no flexibility in the arrangement and configuration of the automatic paper feed mechanism.
Since the required volume of space cannot be substantially eliminated, for example, as mentioned above, this poses a major constraint in terms of miniaturization, operability, and design of the device. Also, the inclination angle of the document loading table was set to 30@
If the following is done, the document may stop midway on the document loading table or near the paper feed section, and the device may not operate even though the document is on the document loading table (initial jump failure).
Otherwise, problems such as some originals being fed but not being fed halfway and the apparatus stopping midway (dry feeding failure) occur, resulting in a lack of reliability.

In order to eliminate these drawbacks, the present invention will be described in detail with respect to the drive surface driven by the means for detecting the presence or absence of an original.

Figure j1111 is an embodiment of the present invention, and shows a partially sectional plan view of the collar. Figure 2 is II of Figure 1.
FIG. 3 is a Confucian view of the section, partially shown in cross section.

In these figures, 1 is a motor that rotates forward and backward by a control circuit and a drive circuit (not shown), 241 toothed PEL), 3 m
, 3b are toothed pulleys, which together with the toothed belt 2 constitute a speed reduction mechanism. 4 is a paper feed roller shaft, 5 is a paper feed roller with a rubber roller attached to the paper feed roller shaft 4, 6 is an auxiliary roller shaft that rotates in the same direction as the rotation of the paper feed roller shaft 4, and T is the auxiliary roller shaft. 6 is an auxiliary roller equipped with a rubber roller, l1m, ab is the paper feed roller shaft 4. A pulley fixed to the auxiliary roller shaft 6, 9 a round bell), 10 a pulley fixed to the paper feed roller shaft 4. 7 and 11 rotatably attached to the auxiliary roller shaft 6 apply pressure to the pulley $1! 12 is a compression spring that presses the 7-mm 10 in the direction of the paper feed roller shaft 4 and applies an appropriate frictional force between the felt 11 and the pulley a1; ISa and ISb are detection elements for detecting the presence or absence of a document, and one is composed of a light emitting element and the other is a light receiving element. 14
is a sorting rubber piece that is pressed against the paper feed roller 5 with an appropriate force by a pressing spring (not shown), and has a coefficient of friction smaller than that between the rubber of the paper feed roller S and the paper (original), and a coefficient of friction between the paper sheets. It has a coefficient of friction larger than , and prevents two documents from being fed at the same time even if they enter the paper feed section at the same time.

Reference numeral 15 denotes a document mounting table in which a through hole 15A is formed, and detecting elements 18m and 13b are arranged facing each other across the through hole 15A. Reference numeral 16 indicates stacked documents, and reference numeral 11 indicates a stopper which is brought into close contact with the arm 10.

In addition, the reverse rotation operation of motor 1 is performed by detecting element 13m,
The control circuit holds the no-document signal at 1'3b- until the trailing edge of the document "I II" passes through the feed gate. Also, feed paper to the auxiliary s = 25'7'-,
The relationship between the friction coefficient and the friction coefficient, the rubber of the auxiliary roller 'T, and the primary movement will be explained using FIGS. 1 and 12.

For the sake of explanation, the auxiliary roller 1 is retracted upward in FIG.
It is assumed that the opening is sufficiently open even when a large number of originals 16 come in. One original 1 is placed on the original table 1s.
When the document is set upward, the detection elements ISa and ISb send out a signal indicating that a document is present, and the motor 1 is driven to rotate the paper feed roller in the direction indicated by the arrow in FIG. Boo U@a,
llb and round belt S transmission mechanism 1) 11111
7-A19 rotates in the direction of arrow C in Fig.
The force is lowered in the direction of the arrow in Figure 2, and pressure is applied to original 1@.
come into contact with Due to the pressure contact and rotational action of this auxiliary T, the uppermost original 11M is fed to a link between the paper feed p-roller 5 and the sorting rubber piece 14, and the uppermost original d is Paper is fed one by one from 16 onwards.

The paper feed progresses through the operation of the auxiliary roller 7 and the paper feed roller 5, and the rear end of the bottom document 216 becomes the inspection document.
When the sensor 13'm', 1mb passes, the detection elements 11a, 13b send out a signal indicating that there is no document.This signal is transmitted by a control circuit #& (not shown), so that the following part of the document 16 is detected. After holding it until it passes the paper feed roller S,
- Rotate motor 1 in the opposite direction. As a result, the paper feeding p-ra S swings up in the direction of arrow 8 while rotating in the direction of arrow B in FIG. p-Ra1 stops at the position where it was initially evacuated.

After a certain period of time, the motor 1 stops and completes the series of operations.

In this embodiment, in order to raise and lower the auxiliary T, the felt 11. Since the arm 10 is used, for example, if a knob is attached to the tip of the arm 10, the auxiliary roller T can be manually adjusted even when the auxiliary roller 7 is in pressure contact with the document 16.
can be swung upwards, allowing additional originals to be set.

In this way, this embodiment detects the original 1 and moves the original 16 to the paper feeding section by pressing the original 16 while rotating the auxiliary row T by the rotational movement of the paper feed roller 5. If not, the structure is such that the auxiliary p-ra T is moved upward and evacuated by swinging up the 7-m 10 by reverse rotation of the paper feed roller 5, but there are other methods, such as parts using electromagnets, etc. There are various ways to make the auxiliary p-ra T move up and down or swing, and there are various ways to make the auxiliary p-ra T move up and down or swing and rotate using a drive source that is completely different from the drive source of the paper feed roller S. Of course, it is possible to adopt the structure of the following format, and the structure is not limited to the structure of this example.

Further, in this embodiment, a method using the paper feed roller 5 and the sorting rubber piece 14 was shown as the paper feeding method.

It is also possible to adopt a paper feeding system such as a reversing roller system. Furthermore, the desired value of the friction coefficient can be obtained by changing the hardness of the rubber.

As explained above, in this invention, when there is no original on the original S tower loading table, the original is moved away from the original loading table by maintaining a certain distance from the original loading table so that enough originals can be set, and when it is detected that the original has been set. It has an auxiliary roller mechanism with a low roller that presses against the original while rotating and transports the original to the paper feed section.As a result, the original can be stably loaded even if the angle of inclination of the original table is small. The paper can be fed to the paper feed section, and the initial feed is empty.

Obstacles such as midway feed can be removed. Furthermore, since the angle of inclination of the original table can be made small, there is a greater degree of freedom in the arrangement and configuration of the automatic paper feeding mechanism, and there is an advantage that the apparatus can be made smaller or a facsimile apparatus etc. with an excellent design can be provided.

[Brief explanation of drawings]

FIG. 1 is a plan view of the essential parts of an embodiment of the present invention, and FIG. 2 is a side view of the essential parts of FIG. 1, partially in section. In the figure, 1 is a motor, 2 is a toothed belt, 3m, 3b is a toothed pulley, 4 is a paper feed p-ra shaft, S is a paper feed roller, @ is an auxiliary p-ra shaft, 1 is an auxiliary roller, 1iar Easy pulley,
- Round bell), 1G is 7-m, 11 is foot z4, 12 is compression splash, 13g, 13bi! A detection element, 14 a sorting rubber piece, 1s a document mounting table, 16 a document, and 17 a stopper.

Claims (1)

[Claims] A plurality of stacked manuscripts are arranged in order from the top one.
In an automatic paper feed mechanism that feeds paper sheet by sheet. A detection element that detects the presence or absence of the N1s, and a signal from this detection element lowers from the upper position to the lower position and moves to the front 1e.
An automatic paper feeding mechanism characterized by comprising an auxiliary roller mechanism including a roller that rotates and contacts the upper surface of the thickness plate at the upper part of IIk.