JPH04179631A - Automatic document circulation/feeder apparatus - Google Patents

Abstract

PURPOSE:To lessen the frictional resistance received from a document-placing base by the documents fed from this base, by providing the base with a frictional-resistance lessening means such as grooves and a rib, and with linear protrusions for reducing the contact area of documents with the base. CONSTITUTION:A document-placing base plate 1 is provided with linear protrusions 56 for making small the contact area thereof with a document as well as with frictional resistance lessening means such as grooves 55, a rib 1a or the like for reducing the frictional resistance. By these provisions, when the documents, which are regularly arranged by abutment of their forward ends against a stopper claw, has their forward end claw regulation released to be moved to a separation-roller position, and when, thereafter, they are separated and fed, the frictional resistance received by them from the base plate 1 is lessened to enable good feeding of the document at all times, regardless of the environmental conditions such as temperatures, or of the the kind of document.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic document circulation feeding device that circulates a document fed from a document table and returns it to the document table.

[Conventional technology]

Conventionally, an automatic document circulation feeding device that circulates the originals fed from the document tray and returns them to the document tray has a conventional automatic document circulation feeder that circulates the document fed from the document tray and returns it to the document tray. There is a system in which air is blown to the leading edge of the document to levitate it, and only the lowest document is sucked into the belt portion of a conveying device using a belt using a vacuum to separate it into single sheets and send them out.

[Problem to be solved by the invention]

However, in the case of automatic document circulation feeding devices that use air to separate documents into individual sheets, the use of an air suction machine increases the size of the entire device and increases costs. There was a problem with this.

In addition, in the case of an automatic document circulation feeding device that repeatedly circulates documents in this way, static electricity is likely to be generated, especially at low temperatures, and when this occurs, documents are likely to stick to each other or the documents and the document table. There was a problem with that.

This adsorption of originals is more likely to generate static electricity if the original is from a foreign country, as the paper quality is often poor in smoothness. Paper was often defective.

This invention was made in view of the above problems,
It is an object of the present invention to always provide good circulation feeding performance of originals, regardless of environmental conditions such as temperature or the type of originals, without increasing the size of the entire apparatus.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides an automatic document circulation feeding device including a paper feeding section including a document placing table, a side fence, a stop claw, a calling roller, and a separation roller as described above.

When the document is brought to the separation roller position after the stop claw is released from the position where the leading edge of the document is brought into contact and aligned, and when the document is separated and fed after being brought to the separation roller. In order to reduce the frictional resistance between the original table and the document table, the document table is provided with frictional resistance reducing means such as grooves and ribs, and the surface of the document table that comes in contact with the document is textured to prevent contact with the document. This is to reduce the area.

The document mounting table of the automatic document circulation feeding device is preferably formed of a conductive resin material.

Further, it is preferable that the side fence of the automatic document circulation feeding device is formed of the above-mentioned conductive resin material, and that the above-mentioned frictional resistance reducing means is provided on the surface that comes into contact with the document.

[For production]

According to the automatic document circulation feeding device configured in this manner, the document placement table is provided with frictional resistance reducing means such as grooves and ribs to reduce frictional resistance, and grains to reduce the contact area with the document. Therefore, when a document that has been aligned with its leading edge in contact with the stop pawl is released from the stop pawl and moved to the position of the separation roller, and when it is subsequently separated and fed. Because the frictional resistance exerted by the document table is small, the document is always fed with good feeding performance regardless of the environmental conditions such as temperature or the type of document.

Also, if the original table is made of a conductive resin material.

By grounding it by body grounding or the like, static electricity charges will not be accumulated on the document table, and the document will no longer be attracted to the document table.

〔Example〕

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view showing a document mounting table provided with frictional resistance reducing means, which is a main part of an automatic document circulation feeding device according to the present invention, and FIG. 2 is a general configuration showing the entire automatic document circulation feeding device. It is a diagram.

This manuscript is automatically 1! As shown in FIG. 2, the ring feeding device regulates the position of a document tray 1 on which a document stack consisting of a plurality of document sheets is placed, and the edges of both sides of the document tray on the document tray 1. With side fence 2.

A stop claw 5 that contacts and aligns the leading edge of the document stack on the document table 1, call rollers 3a and 3b that call the aligned document stack to a separation position 40, and the separation position 4.
The paper feeding unit 70 includes a separation roller 8 that separates and feeds the lowest document of the stack of documents that has been moved to zero.

Further, the original document fed to the left in FIG. A conveying section 71 has a conveying belt 12 for discharging the exposed original document, and the original document discharged from the conveying section 71 through the reversing path 17 is arranged so as to overlap the original east upper side placed on the document placing table 1. It also includes a document return unit 73 for returning documents.

The two calling rollers 3a and 3b are provided near the front of the document table 1 at intervals in the document feeding direction, and the omitted circular portions formed in a part of each roller are the same. As shown in the figure, when positioned on the upper side, they are prevented from protruding above the document placement surface 1a.

Each shaft of the calling rollers 3a and 3b has a slit plate whose slit is detected by a photoelectric sensor (not shown).
A positioning plate is attached to each of the calling rollers, and the positioning plate is arranged so that the concave portion coincides with the position corresponding to the omitted circular portion, and a pressing roller is engaged with the peripheral edge of the positioning plate by a spring.

These mechanisms allow the two calling rollers 3a and 3b to
The missing circular parts rotate synchronously with the same phase.

The slit plate and the photoelectric sensor stop the document mounting table 1 and the omitted circular portion at the rotational position shown in FIG. It has become.

A flexible presser plate 4 (for example, made of a soft elastic material such as Mylar (trade name)) is provided above the pick-up roller 3a to push down the leading edge of the document tray and press it against the pick-up roller 3a.

Further, above the holding plate 4, a solenoid 67 shown in FIG. 3 rotates about a shaft 41 on the rear end side (right side in FIG. 4) as a fulcrum, and is placed on the document mounting table 1. The position shown by the imaginary line in FIG. 4 where the front end of the document bundle is locked, and the position shown by the imaginary line in FIG. A stop pawl 5 is provided which is movable to the position indicated by the solid line.

When the stop pawl 5 is in the position shown in FIG. 2, the tip of the original document is placed against the pawl and the paper feed signal is output from the copying machine at a predetermined timing. It rotates upward to release the restriction on the leading edge of the document, and the push plate 82 moves from the rear from the position shown by the solid line to the position shown by the imaginary line, and the calling rollers 3a and 3b both rotate once, and the document is stacked. is called into the separation position 40.

At this time, at the same time as the stop pawl 5 rotates, the base portion 4a of the presser plate 4 is pressed down by the moving stop pawl 5 as shown in FIG. The document is surely conveyed by being pressed against the roller 3a.

Then, after a predetermined period of time, the stop claw 5 descends and presses the document tray downward, and when the stop claw 5 descends, the calling rollers 3a and 3b are still protruding above the document table 1, and are stopped early. Pressure is applied by the claws 5.

Thereafter, the calling rollers 3a and 3b make one more rotation after the above-mentioned one rotation, and cooperate with the separation roller 8 to reliably feed the lowest one of the document bundles.

In this way, the stop claw 5 functions as a pressing means during paper feeding when the document set on the document table 1 is fed to the separation position 4o, and is located at the position shown by the solid line in FIG. Sometimes, the skew is corrected by making the leading edge of the original Dr, which is fed from the original fII table 1, circulates, and returns from the direction of arrow A onto the original stack on the original placing table 1, against it. During the feeding of the original document, it also performs the function of sorting the original from the circulated original Dr.

In FIG. 4, reference numeral 6 denotes an original set sensor, which detects whether or not a stack of originals is set on the original platen 1.
Based on the detection signal, the calling rollers 3a and 3b are each rotated by a certain amount in the direction of the arrow, and the document bundle is moved to the position shown in the figure (a position other than the uppermost document Dr).

The separation roller 8 rotates in the direction of arrow B in FIG. 4 at a speed where the circumferential speed corresponds to the conveyance speed of the document, and the separation belt 7 is pressed against the separation roller 8 over a part of the circumference of the surface thereof, The friction coefficient between the separation roller 8 and the document holder is 1. The friction coefficient between the separation roller 8 and the document holder is 1. The friction coefficient is 1. By appropriately setting the friction coefficient between the originals and the friction coefficients between the originals, if there are multiple originals, only the lowest one can be separated, and if there is only one original from the beginning, can be conveyed as it is toward the pull-out rollers 9 and 10 on the downstream side.

The separation roller 8 has a built-in one-way rotation clutch, and the pull-out roller 9. When the document is conveyed by lO, even if the drive of the separation roller 8 is stopped, it rotates together with the separation roller 8, reducing the load on document conveyance and conveying the document at a predetermined speed.

The separation roller 8 is driven on and off by a clutch (not shown), and when the registration sensor 11 provided on the conveyance path between the paper feed section 70 and the conveyance section 71 detects the leading edge of the document, the clutch is turned off. Then, the drive to the separation roller 8 is cut off.

The registration sensor 11 also detects the trailing edge of the document, and the signal is used for timing control to stop the document at a predetermined exposure position on the contact glass 101.

Note that the priming rollers 3a and 3b, the separation roller 8, and the pull-out roller 9 can be driven by one motor or by separate motors.

The document return unit 73 shown in FIG. 2 is movable on the upper surface of the document placement table 1 in the document feeding direction (left and right direction in FIG. 2).
The original that is returned along the top surface of the original placing table is
It has a discharge section 18 equipped with a pair of paper discharge rollers 19 for discharging the bundle of documents placed on the document table 1 above the upper surface thereof.

The discharge section 18 is connected to a guide plate 2 that forms a document return path.
1, a lower guide 29 disposed opposite to the lower guide 29 with a front convex slope, and pairs of paper ejection rollers 31 and 19 provided at the entrance and exit sides of the document return path formed by these, respectively. ing.

A stop claw 5 is placed on the document tray 1 of the paper feed section 7o when the document tray is brought into the position of the separating roller 8 after the stop claw 5 is released from the position shown in FIG. A plurality of parallel grooves 55 extending in the document feeding direction are used to reduce the frictional resistance between the document tray 1 and the document table 1 when the document document drawn up to the separation roller 8 is separated and fed. is formed in the movement range of the discharge section 18 as clearly shown in FIG.

In addition, a plurality of long and short ribs 1b extending in the document feeding direction are provided at intervals near each opening 1c for causing the preheating rollers 3a and 3b formed on the document placement table 1 to protrude above the document placement surface 1a. Place them and form them in parallel (6 in this example),
Textures 56 (illustrated in stippling) with uneven heights of about 5 μm to 300 μm are provided on the document placement surface 1a of the document placement table 1, which is the contact surface with the document tray, to reduce the contact area with the document tray. I'm trying to keep it small.

Note that, as shown in FIG. 2, the grooves 55 of the i-loading table 1 have protrusions 29a formed in a comb-like shape at the lower end of the lower guide 29 in correspondence with the positions of the grooves 55 so as to be able to move smoothly. The document is fitted onto the document tray 1 through the reversing path 17 shown in FIG.
8, the paper can be reliably and smoothly guided by a lower guide 29 and discharged by a pair of discharge rollers 19.

As described above, the automatic document circulation feeding device according to this embodiment includes frictional resistance reducing means such as grooves 55 and ribs lb for reducing frictional resistance on the document placing table 1, and frictional resistance reducing means for reducing the contact area with the document. Since the grain 56 is provided, as shown in FIG. 2, the original document aligned with its leading edge in contact with the stop pawl 5 is released from the restriction of its leading edge by the stop pawl 5 and moves to the position of the separation roller 8. Since the frictional resistance received from the document mounting table 1 is reduced when the original is separated and fed, the document can always be fed with good performance regardless of the environmental conditions such as temperature or the type of original. It will be delivered.

Also, JJ! If the document placement table 1 is made of a conductive resin material, electrostatic charge will not accumulate on the document placement table 1 by grounding the body of the document placement table 1. can prevent adsorption.

Further, if the side fence 2 shown in FIG. 2 is also formed of a conductive resin material and the above-mentioned frictional resistance reducing means is provided on the surface in contact with the document tray, even better feeding performance can be obtained.

Note that the holding plate 4 may be formed of a thin leaf spring, or may be formed of a thin plate-shaped resin material (trade name: Mylar, etc.) that has been subjected to electrostatic treatment.
If it is formed with , it also has the effect of preventing the document from being attracted by static electricity.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to reduce the frictional resistance reducing means such as grooves and ribs on the original table and to reduce the contact area with the original without increasing the size of the apparatus. By simply providing the grain, it is possible to reduce the frictional resistance that the document receives from the document tray when it is fed from the document tray, so the document can always be kept in good condition regardless of the environmental conditions such as temperature or its type. It can be fed with good feedability.

In addition, if the document table is made of conductive resin material, it is possible to prevent static electricity from accumulating on the document table by grounding the body of the document table, thereby preventing the document from being attracted to the document table. If the side fences are also made of conductive resin material, even better document feeding performance can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a document mounting table provided with a frictional resistance reducing means, which is a main part of the automatic document circulation feeding device according to the present invention, and FIG. 2 is a general configuration showing the entire automatic document circulation feeding device. Figure 3 is a front view showing the document placed on the ribs of the document table and the stop claw; Figure 4 is an enlarged schematic view of the paper feeding section of the automatic document circulation feeding device; The figure shows the state in which the stop claw of the paper feed section is raised.
FIG. 1... Document placement table 1b... Rib 2...
Side fences 3a, 3b... Calling roller 5... Stop claw 7... Separation belt 8.
...Separation roller 4o...Separation position 55...
・Groove 56...Grain 70...Paper feed section 71...Transport section 73...Document return section
100...Copy machine body D...Manuscript Ganto Hatake Rico Co., Ltd. -

Claims (1)

[Scope of Claims] 1. A document placement table on which a document is set, side fences that regulate the positions of both side edges of the document on the document placement table, and a leading edge of the document brought into contact with and aligned on the document placement table. Equipped with a paper feeding section consisting of a stop claw, a calling roller that brings the aligned originals to the separation position, and a separation roller that separates and feeds the lowest original of the document stack that has been moved to the separation position. In the automatic document circulation feeding device, when the document is brought to the position of the separation roller after the stop claw is released from the position where the leading edge of the document is brought into contact with and aligned, and after the document is brought to the separation roller. Frictional resistance reducing means such as grooves and ribs to reduce the frictional resistance between the original and the original document mounting table during separation and feeding;
An automatic document circulation feeding device characterized in that it is provided on the document placing table and a texture is provided on the surface of the document placing table that comes in contact with the document to reduce the area of contact with the document. 2. The automatic document circulation feeding device according to claim 1, wherein the document placement table is made of a conductive resin material. 3. The automatic document circulation feeding device according to claim 1 or 2, wherein the side fence is formed of the conductive resin material, and the frictional resistance reducing means is provided on a surface that contacts the document. Automatic circulation feeding device.