JPS6123142B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeder for feeding originals into a facsimile machine, a copying machine, etc., and more specifically, to an automatic document feeder capable of manual paper feeding.

2. Description of the Related Art A paper feeding device is already known which is provided with a vacuum unit as one of paper feeding means for sucking a document and sending it to a processing section such as a document reading section, above a document table on which a document is placed. The vacuum unit is swingably provided to be selectively positioned between a sheet feeding position and a non-sheet feeding position with respect to the document table. The document is placed on the document table by swinging the vacuum unit to the non-feeding position and placing the document on the document table with its tip touching the document positioning member provided at the tip of the document table. to the paper feed position. After that, press the paper feed button,
The uppermost document is attracted to the bottom surface of the vacuum unit by the negative pressure of the vacuum unit. The attracted document is sent toward the processing section by the friction of a rotating feed roller with a portion of its peripheral surface protruding from the bottom surface.

By the way, in this type of paper feeding device, when feeding a large number of originals, if they are stacked on the original table and the vacuum unit is activated, the originals are separated and fed one by one starting from the highest one. Although this method is extremely convenient, it has the disadvantage that even if only one original sheet is to be fed, the vacuum unit must be used to feed the original sheet as in the case of multiple original sheets, which makes the operation cumbersome.

When feeding a single document, it is conceivable to swing the vacuum unit to the non-feeding position and manually feed the document, avoiding the document positioning member. It is difficult to insert a manuscript into.

The present invention has been made in view of the above, and includes:
To provide a paper feeding device which is easy to operate and has a simple structure, which allows one sheet to be easily fed manually.

It is an object of the present invention to provide a paper feeder of the type described above with a gap between the first document table on which a document is placed during manual paper feeding and the first document table during automatic paper feeding. a second document table on which a document is placed during automatic paper feeding, the second document table being selectively located at a first position and a second position that swings following the swinging of the paper feeding means to the non-feeding position; This is achieved by a paper feeding device characterized by comprising the following.

According to the present invention, when feeding a large number of originals, the second original table is positioned at the first position, the originals are loaded, and the paper feeding means is used to automatically feed the originals,
When feeding one document or a very small number of documents, the paper feeding means is swung to the non-feeding position and at the same time the second document table is swung to the second position to follow the same. Therefore, the first document table is exposed, the document can be placed on the first document table, and the document can be manually fed from the table. Furthermore, when the second document table is in the first position, a predetermined gap is formed between it and the first document table. Paper can also be fed from this gap without swinging the document table to the non-feeding position or the second position. In other words, by providing the document table in two layers, when feeding a single document,
There is no need to take the trouble to operate a paper feeding means for automatic paper feeding, and a paper feeding device with good operability can be provided.

Hereinafter, the present invention will be explained in detail with reference to an illustrated embodiment.

In FIGS. 1 to 3, reference numeral 1 indicates a vacuum unit as a paper feeding means. Vacuum unit 1 has a document suction plate on its bottom surface.
It has a vacuum fan inside (neither is shown). The vacuum unit 1 is also provided with a document feed roller 2 having a portion of its peripheral surface protruding from a hole formed in the document suction plate.

Further, a pivot 3 is provided above the tip of the vacuum unit 1, and both ends of the pivot 3 are rotatably supported by support arms 4a, 4a of a pair of base frames 4, 4. (See Figure 4). The vacuum unit 1 is selectively positioned between the paper feeding position shown in FIGS. 2 and 3 and the paper non-feeding position shown in FIG.

As clearly shown in FIG. 3, the pair of base frames 4, 4 have their lower edges bent inward, respectively. The bent portions 4b, 4b include
Both side edges 5a and 5b of the first document table 5 that are bent inwardly are fixed to each other. Therefore, the substrates 4, 4 are connected by the first document table 5 and are substantially integrated.

The first document table 5 is used to place a document during manual paper feeding, and its leading edge 5c has a pair of transport rollers (not shown) that send the document to a processing section (not shown), such as a reading section of a facsimile machine. figure)
It extends to the vicinity of.

In the bent portions 4b, 4b of the base frames 4, 4,
A document guide table 6 is placed, and its front edge 6a
is arranged so as to be at the same level as or slightly higher than the rear edge 5d of the first document table 5.

A second document table 7 is arranged above the first document table 5 with a gap D therebetween. The second document table 7 has leg portions 7a, 7 whose both ends are bent.
At b, the document is placed on the first document table 5 under its own weight. One end 8a is provided on the upper surface of the front end of both legs 7a, 7b.
A base 8b of a support arm 8 pivotally attached to the pivot 3 is fixed, and the second document table 7 is swingable about the pivot 3. On the front edge of the second document table 7,
A document positioning member 7d is provided which abuts the front edge of the document _S1 to be loaded thereon, and an engagement hole 7c is formed in the upper surface of one leg 7b. An opening A is formed in the rear side portions of the second document table 7 and the first document table 5 so as to be spaced apart from each other.

On the other hand, the vacuum unit 1 is swingably provided with a locking lever 9 that fits into the engagement hole 7c of the second document table 7. This locking lever 9 is
connected to a clinic mechanism not shown;
When the operation button 10 is pushed in as shown in FIG. 2, the locking end 9a and the engagement hole 7c swing in a direction in which they do not engage, and when the button 10 is pushed further, as shown in FIG. When the lever 9 is protruded, the lever 9 swings in such a direction that the locking end 9a engages with the engagement hole 7c.

As shown in FIGS. 2 and 5, the second document table 7 is a first document table whose legs are placed on the first document table 5.
As shown in FIG. 6, the vacuum unit 1 can be selectively positioned at a second position where the vacuum unit 1 is swung to follow the vacuum unit 1 that is swung to the non-sheet feeding position.

The operation of the apparatus of the present invention configured as above will be explained.

To perform automatic paper feeding, as shown in Figure 5,
The vacuum unit 1 is swung to the non-feeding position to expose the placement surface of the second document table 7 in the first position, and the documents S ₁ to be automatically fed are stacked thereon. do. After that, as shown in Figure 2,
The vacuum unit 1 is swung back to the paper feeding position. At this time, the unit 1 has the stopper 11
(See FIG. 3) is held in that position by abutting against the upper surface of the leg 7a. Further, the position of the vacuum unit 1 shown in FIG. 5 is temporarily held by an appropriate positioning mechanism (not shown).

Then, when a paper feed button (not shown) is pressed, the vacuum unit 1 starts operating, sucks the uppermost document on the document suction plate, and uses the friction of the rotating feed roller 2 to move the suctioned document along the arrows. It is sent to a processing section (not shown) in the direction of a (FIG. 2). The document _S1 on the second document table 7 is processed by the signal from the processing section.
They are sent out sequentially.

Next, to manually feed paper, as shown in Fig. 2, push the operation button 10 of the vacuum unit placed in the paper feed position and swing the locking lever 9 to lock it. After engaging the end 9a with the engagement hole 7c,
When the unit 1 is swung to the non-feeding position, the sixth
As shown in the figure, the second document table 7 follows this and swings about the pivot 3 to the second position. As the second document table 7 swings, the placement surface of the first document table 5 is exposed, so that the manual document S ₂ can be manually fed from the document table 5 to the processing section in the direction of arrow a. Paper is fed. Of course, during this manual feeding, the document _S2 is pushed in the direction of arrow a until its leading edge is gripped by a pair of transport rollers of a processing section (not shown).

If the manually fed document S ₂ is relatively short, as shown in Figure 6, vacuum units 1 and 2
Manual feeding is not possible without swinging the document table 7, but if the document is relatively long like the document _S3 shown in FIG. While the document is in the paper position and the first position, the document can be manually fed by inserting the document from the opening A into between the first and second document tables using the document guide table 6 as a guide.

Note that the means for engaging and disengaging the vacuum unit 1 and the second document table from each other may be not only mechanical but also electrical, such as using a solenoid. Further, the paper feeding means is not limited to the vacuum unit shown in the drawings, but may be a paper feeding roller provided with separation corner claws on the second document table so as to be swingable with respect to the second document table.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the paper feeding device of the present invention, and FIG. 2 shows the vacuum unit in the paper feeding position.
FIG. 3 is a partial side sectional view showing the state in which the second document table is placed in the first position, and FIG.
4 is a plan view excluding the vacuum unit, FIG. 5 is a partial sectional view explaining the function during automatic paper feeding, and FIG. 6 is a partial sectional view illustrating the function during manual paper feeding. It is. 1... Vacuum unit, 5... First document table, 7
...Second manuscript table.

Claims (1)

[Claims] 1. A document table on which a document is placed, and a swinging device disposed above the document table and selectively positioned in a paper feeding position and a non-paper feeding position with respect to the document table. What is claimed is: 1. A paper feeding device comprising a flexible paper feeding means, characterized in that a document table for manual paper feeding is provided below the document table with a predetermined gap therebetween. 2. To a first position located with a gap between the first document table on which the original is placed during manual paper feeding and the first document table during automatic paper feeding, and to the non-feeding position of the paper feeding means. Claim 1, further comprising: a second document table on which a document is placed during automatic paper feeding, which is selectively located at a second position that swings in accordance with the swing of the document table; Paper feed device as described.