JPH0420433A - Medium delivery organization - Google Patents

Abstract

PURPOSE:To easily deliver medium, even limp and thin, by pressing downward and turning a set plate, after setting a medium thereon, which is supported elastically by a supporting means and sustained by a sustaining pivot at one end so as to turn freely. CONSTITUTION:When a set plate 4 is pressed downward after placing a medium 1 thereon, the set plate 4, which was supported elastically by a supporting means 16, turns with a pivot 11 at one end as a pivot. A push-up means 12 pushes a press plate 9 up in linkage with the turn of the set plate 4 and forms a gap between the press plate 9 and a delivery roller 8. When the set plate 4 is released from being pressed down after pushing the plural number of medium 1 forward and inserting them into the gap, the medium 1 is sandwiched between the delivery roller 8 and the press plate 9 and then delivered by the rotation of the delivery roller 8. Thus even a thin medium such as a limp paper can be delivered easily and certainly.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a medium feeding mechanism that can push up a pressing plate that presses against a feeding roller by rotating a set plate downward using its tip as a fulcrum, and allows even thin media to be fed easily and reliably. The purpose of the present invention is to provide a medium feeding mechanism that can feed media while preventing skew, and a setting plate that collects and sets a plurality of media, and a resin that has elasticity and a large coefficient of friction. a feed-out roller made of material and provided in front of one end of the set plate; and a press plate that clamps the leading ends of the plurality of media inserted from the set plate together with the feed-out roller and presses them with a predetermined pressure. Equipped with
A media feeding mechanism that feeds out a plurality of media held between a feeding roller and a pressing plate one by one by rotation of the feeding roller, and the mechanism includes a support shaft that rotatably supports a set plate at an end near the feeding roller; , a holding means that elastically holds the plate to the set plate 1 at a predetermined inclination angle that is substantially horizontal or forward downward; and a push-up means for pushing up the pressure plate until a gap is created between the pressure plate and the feed roller in which a plurality of media can be inserted.

(Industrial Application Field) The present invention relates to a paper feeding mechanism for originals and recording paper in facsimile (hereinafter referred to as FAX) machines, etc., and in particular, by rotating a set plate downward with its tip as a fulcrum, the feed roller is The present invention relates to a medium feeding mechanism that can push up a press plate that is pressed against the press plate.

(Prior Art) FIG. 6 shows a side view of a FAX machine, and in the figure, 2 is a reading surface made of glass, for example.

Reference numeral 3 denotes a presser plate that holds down the original 1a set on the reading surface 2; 4a denotes a set plate 15 attached obliquely to the upper end of the presser plate 2; -Document Feeder (hereinafter referred to as ADF) 50, an automatic paper feeder, 6 a stacker, and 7 an image sensor.

The image sensor 7 is arranged in the device below the automatic paper feeder 5, and is moved in the direction of arrows A and B along the lower surface of the reading surface 2 by a moving mechanism (not shown) between the position indicated by the two-dot chain line in the figure. Move back and forth.

Therefore, the original 1a can be read in the following two ways.

(1) The originals 1a are placed one by one onto the reading surface 2 downward, and the image sensor 7 is moved from the home position in the direction of arrow A to read them. This method is used when there is a small number of documents for immediate transmission.

■Place multiple sheets of originals 1a on set plate 4a, then set AD
The sheets are fed one by one by the F50 and read by the image sensor 7 stationary at the home position. The original 1a is sent to the stacker 6. This method is used when there are a large number of originals or when automatically sending documents at a specified time.

The present invention relates to, for example, the ADF 50 (1), and the mechanism will be explained below.

As shown in the side view of the seventh issue, the ADF 50 is formed of a resin material 1 having a large coefficient of friction, such as rubber, and a feeding roller 8a, which is formed into a flat plate shape using a stainless steel plate for a spring, and one end of which is supported. The first time that the tip comes into pressure contact with the surface! IJIIG feed spring 9a+Hatsutomo A separator 10 made of an elastic resin material 1 that contacts the surface of the feed roller 8a in front of the conveyance spring 9a and is made of, for example, rubber, and that is pressurized from the back side by a pressure spring (not shown). and a document set sensor S1. The feeding roller 8a is connected to a motor (not shown).

With such a configuration, the document 1a is placed on the set plate 4a.
When the document 1a is set and sent forward, the leading edge of the document 1a is regulated at the position where it is pressed against the feed roller 8a of the initial conveyance spring 9a, and the document set sensor S1 detects this, and the feed roller 8a starts rotating.

The document 1a is first sandwiched between the 11JIIER feed spring 9a and the feed roller 8a, but at this time, due to the difference in frictional force between the initial conveyance spring 9a and the document 1a+, the document 1a and the feed roller 8a, a conveyance force is applied to the document 1a. Given. At this time, the documents 1a may be separated from each other. Next, the originals 1a are separated due to the difference in frictional force between the originals 1a, between the separate rake 10 and the original 1a+, between the feeding roller 8a and the original 1a (the frictional force increases in the order shown on the left), and the originals 1a are fed out one by one to the image sensor 7. Supplied upwards.

[Problems to be Solved by the Invention] According to the above conventional method, when the document on the set plate is fed out and its position is regulated by the first yI conveyance spring that comes into pressure contact with the feed roller, the feed roller rotates and the document is The document is fed out, but even if the document is slanted, it will still be conveyed. In addition, in the case of a thin paper document that has weak stiffness, the document cannot be fed out because it is not engaged between the initial conveyance spring and the feeding roller.

There is a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a medium feeding mechanism that can feed out even thin media easily and reliably, and can feed the medium while preventing skew.

[Means to solve the problem] FIG. 1 shows a basic configuration diagram of the present invention.

In the figure, 1 is a medium, 4 is a set plate that collects and sets a plurality of media 1, and 8 is made of a resin material that is elastic and has a large coefficient of friction, and is located at the front of one end of the set plate 4. 9 is a pressure plate that clamps the tips of the plurality of media 1 inserted from the set plate 4 together with the feed roller 8 and presses them with a predetermined pressure; 11 is a set plate; 4 is a support shaft rotatably supported at the tip near the feeding roller 8; 16 is a holding means for elastically holding the set plate 4 at a predetermined inclination angle that is substantially horizontal or forward downward; 12 is a safety plate; When the surface of 4 is pressed downward, in conjunction with the rotation of the set plate 4 about the support shaft 11, the press plate 9 is moved until a gap is created between the press plate 9 and the feeding roller 8 through which the medium 1 can pass. 9
It is a means of pushing up.

Therefore, the press plate 9 is pushed up by the push-up means 12, a plurality of media 1 are inserted into the gap, the medium 1 is held between the feed roller 8 and the press plate 9, and the medium 1 is held one by one by the rotation of the feed roller 8. It is configured to be rolled out.

[Operation] When the medium 1 is placed on the set plate 4 and the set plate 4 is pressed downward, the set plate 4, which was elastically held by the holding means 16, rotates around the support shaft 11 at the tip. In conjunction with this rotation, the push-up means 12 pushes up the pressure plate 9, creating a gap between the feeding roller 8 and the pressure plate 9. Therefore, when the plurality of media 1 are pushed forward and inserted into this gap and the pressure of the set plate 4 is released, the medium 1 is sandwiched between the feeding roller 8 and the pressing plate 9, and the medium 1 is held by the rotation of the feeding roller 8. is rolled out.

In this way, even thin media such as weak paper can be easily and reliably fed out.

(Embodiment) An embodiment according to the present invention will be described with reference to Figs. 2 and 3. The same reference numerals indicate the same objects throughout the plan.

The original 1a, the initial conveyance spring 9a, the lever 12a, and the spring 16a in FIG. 2 are connected to the medium 1 in FIG. Pressing plate 9. They correspond to the push-up means 12 and the holding means 16, respectively.

As shown in FIG. 2, the set plate 4b is rotatably supported by a support shaft 11a at the right end in FIG.

An abutment portion 13. below the set plate 4b, the tip of which is bent upward, is located slightly to the right of the contact position between the feed roller 8a and the initial conveyance spring 9a and extends below the set plate 4b. and a lever 1 having a pressing portion 14 protruding from the rear end.
2a is provided. The lever 12a is rotatably supported by a support shaft 15 at a midpoint downwardly slightly behind the support shaft 11a, and is pulled by a spring 16a, so that the abutment portion 13 at the tip is normally located below the initial conveyance spring 9a. , is located below the running surface of the document 1a fed out by the feeding roller 8a, and a pressing portion 14 at the rear end presses the lower surface of the set plate 4b upward.

An engaging portion 17 is provided on the lower surface of the set plate 4b, and engages with an engaging portion 19 provided on the frame 18 to
A predetermined upward inclination angle of the 4ff 14b is maintained, and the lower end of the retaining portion 17 abuts against the frame 18 to restrict downward rotation of the set plate 4b.

Also, a sensor S2 detects the leading edge of the document 1a near the contact position between the feeding roller 8a and the pressing plate 9a. A sensor S3 is provided near the rear end of the set plate 4b to detect that the set plate 4b is in the normal position. The sensor 52S3 is connected to the feed-out control section 20, and the feed-out roller 8a is connected to a motor M whose drive is controlled by the feed-out control section 20.

Sensor S2. The feeding control unit 20 drives the motor M based on the AND of the detection output of S3.

With such a configuration, the document 1a is placed on the set plate 4b.
When the set plate 4b is pressed downward with the set plate 4b placed on it, it rotates in the direction of arrow A around the support shaft 11a, as shown in FIG. The abutting portion 13 at the tip rotates in the upward direction of the arrow to release the initial conveyance spring 9.
Push up a and feed roller 8a for the first time! lJ]il A gap is created between the sending springs 9a, and the engaging portion 17 is connected to the frame 18.
contact and create the maximum gap.

At this time, the abutment part 13 is for the first time! iJ] IIm is in contact with the lower side of the feeding spring 9a almost perpendicularly, and when the document 1a on the set plate 4b is sent out in the feeding direction, the leading edge of the document 1a passes through the gap and comes into contact with the abutting portion 13, Even if there is skew during feeding, it will be corrected. Also, the leading edge of the document 1a is connected to the sensor S.
2 detected.

Then, when the pressure on the set plate 4b is released, the spring 1
Due to the restoring force of the lever 6a, the rear end of the lever 12a rotates in the direction of the arrow B, and the presser ff14b is pushed by the pressing portion 14 and rotates in the direction of the arrow B, returning to its original position, and the abutting portion 13
rotates in the upward direction of the arrow, the push-up of the initial conveyance spring 9a is released, and the leading edge of the document 1a is held between the feeding roller 8a and the initial conveyance spring 9a. Then, sensor S3 detects the return of set plate 4b, and sensor S2. After the detection in S3 is ANDed, the feed roller 8a starts rotating and the document 1a is fed.

Further, different embodiments are shown in FIGS. 4 and 5.

The different embodiments differ from the embodiment described in FIG.
In place of the lever 12a, a protruding rod 12b is installed at the tip of the set plate.
This is because we have established the following.

That is, as shown in FIG. 4, a protruding rod 12b is provided at the tip of a set plate 4c supported by a support shaft 11a. The tip of the protruding rod 12b is provided with an abutment portion 13a bent in the direction of the initial conveyance spring 9a.

One end of the spring 16b is attached to the lower surface of the set plate 4C, and the other end is fixed to the frame 18.
) The plate 4c is urged upward.

In the normal state, the set plate 4C is inclined at a predetermined angle with the engaging portions 17.19 engaged and biased by the spring 16b.
The tip of the protruding rod 12b is located below the initial conveyance spring 9a and below the running surface of the document 1a fed out by the feeding roller 8a.

With such a configuration, the original 1a is placed on the set plate 4C.
When the set plate 4C is pressed downward, it rotates about the support shaft 11a in the six directions of the arrows, and the tip of the protruding rod 12b rotates in the upward direction of the arrow, as shown in FIG. , the abutment part 13a at the tip is the first! IJIII Push up the feed spring 9a and connect it to the feed roller 8a! tJ]lfl A gap is created between the sending springs 9a, and the retaining portion 17 comes into contact with the frame 18, resulting in a maximum gap.

At this time, the abutment part 13a is in almost perpendicular contact with the lower side of the initial conveyance spring 9a, and when the document 1a on the set plate 4C is sent out in the feeding direction, the leading edge of the document 1a passes through the gap and comes into contact with the lower side of the initial conveyance spring 9a. It comes into contact with the portion 13a, and even if there is skew during feeding, it is corrected. At this time, the leading edge of the document 1a is connected to the sensor S2.
detected.

Then, when the pressure on the set plate 4c is released, the spring 1
Due to the restoring force of 6b, the set plate 4C rotates in the direction of arrow B and returns to its original position, and the abutting portion 13a of the protruding rod 12b
rotates in the direction of arrow F to release the push-up of the initial conveyance spring 9a, so that the leading edge of the document 1a is held between the feeding roller 8a and the initial conveyance spring 9a.

Sensor S3 detects the return of the set plate 4c, and sensor S2
．． By removing the AND in S3, the feed roller 8a starts rotating and the document 1a is fed.

In this way, the original m1a is set and the set plate 4b,
By pressing 4c, the initial conveyance spring 9a; 91
th- can be pushed up to insert the original 1a into the gap created between the feeding roller 8a and the abutting portion 1.
Since the skew can be corrected by abutting the leading edge of the original 1a against 3 and 13a, even weak and thin paper can be easily fed out, and the skew can be corrected and sent out.

In the above example, the case of feeding out the document of a FAX machine was explained, but it may also be applied to the case of feeding out the document of a copying machine. A similar effect can be obtained even if applied in any case.

Further, in the above example, instead of the initial conveyance spring 9a, a pressing plate pressed by another member may be used.

[Effects of the Invention] As explained above, according to the present invention, the medium is set on the set plate whose tip end is rotatably supported by the spindle and elastically held by the holding means, and the set plate is set. By pressing downward and rotating, the push-up means can push up the press plate and insert the medium into the gap created between it and the feeding roller, making it easy to feed out even weak and thin media. In addition, since the medium inserted into the gap can be corrected by hitting the abutting portion provided at the tip of the push-up means, there is an effect that the medium can be fed out in a skewed manner.

[Brief explanation of drawings]

Fig. 1 is a diagram of the principle configuration of the present invention, Fig. 2 is a side view showing an embodiment of the invention, Fig. 3 is an explanatory diagram of the embodiment, Fig. 4 is a side view showing a different embodiment, Fig. 5 6 is an explanatory diagram of a different embodiment, FIG. 6 is a side view of a FAX machine to which the present invention is applied, and FIG. 7 is a side view of a conventional example. In the figure, 1 is a medium, 1a is a document, 4.4a is a set plate, 8 and 8a are feeding rollers, 9
is the pressing plate, 9a≠ is the initial conveyance spring, 11,
lla, 15 is a support shaft, 12 is a push-up means, 12a is a lever, 12b is a protruding rod, 16 is a holding means,
16a indicates a spring. 1 Smoking period 4 Set 8 Feeding roller 9, pressing plate 11 Supporting glaze Processing diagram of the present invention Fig. C Fig. Rough surface diagram showing ΣExplanatory diagram of the embodiment according to variation f

Claims (1)

[Claims] 1) A set plate (4) for accumulating and setting a plurality of media (1), and a set plate (4) made of a resin material having elasticity and a large coefficient of friction; A feed-out roller (8) provided in front of one end, and the tip portions of the plurality of media (1) inserted from the set plate (4) are held together with the feed-out roller (8) and a predetermined pressure is applied. and a pressing plate (9) that presses the plurality of media (1) held between the feeding roller (8) and the pressing plate (9) into one sheet by rotation of the feeding roller (8). The medium feeding mechanism is configured to feed out the medium one by one, and includes a spindle (11) that rotatably supports the set plate (4) at a tip closer to the feed roller (8), and a support shaft (11) that rotatably supports the set plate (4), The holding means (16) is held at a predetermined inclination angle, which is substantially horizontal to the support shaft (11) or downwardly forward in the direction of the support shaft (11).
), and when the surface of the set plate (4) is pressed downward, the press plate (9) and the feeding plate are rotated in conjunction with the rotation of the set plate (4) about the support shaft (11). A medium feeding mechanism characterized by comprising: pushing means (12) for pushing up the pressing plate (9) until a gap is created between the rollers (8) in which the plurality of mediums (1) can be inserted. 2) The push-up means (12) is configured to rotate the set plate (4) downward about the support shaft (11).
One end is pressed and rotates on an intermediate fulcrum, and the other end is a pressing plate (9
) is a lever that pushes up the lever.
Media feeding mechanism as described. 3) The lever is slightly forward in the direction in which the medium (1) is fed out from the position where the pressure plate (9) comes into pressure contact with the feeding roller (8), and the lever is moved at a position where the medium (1) abuts. The medium feeding mechanism according to claim 2, characterized in that the pressing plate (9) is pushed up. 4) The push-up means (12) is attached to the front end of the set plate (4), and is attached to the support shaft (1) of the set plate (4).
2. The medium feeding mechanism according to claim 1, characterized in that the tip thereof is a protruding rod that pushes up the press plate (9) by rotating downward about the center point (1). 5) The protruding rod is located at a position slightly forward of the direction in which the medium (1) is fed out from the position where the pressure plate (9) comes into pressure contact with the feeding roller (8), and at a position where the medium (1) abuts. The medium feeding mechanism according to claim 4, characterized in that said pressing plate (9) is pushed up.