JPH0240568B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic document feeder that automatically feeds and sets a document on the document setting surface of an image processing device such as a copying machine, and particularly relates to an automatic document feeder that automatically feeds and sets a document on the document setting surface of an image processing device such as a copying machine. This invention relates to a method for reversing a document that has been placed inside and out and feeding and setting it on the document setting surface again.

[Prior Art] Various proposals have been made in the past for this type of double-sided original, after setting the front side on the original setting surface, flipping the document upside down and automatically setting the back side for sequential copying. , as in Utility Model Application No. 51-136151, there is a conveying means that feeds the original from one end of the document set surface to the other end. It is known that a conveying means for returning the document is extended and a document discharge port is provided on the feeding port side.

[Problems to be Solved by the Invention] In this device, the document ejection port is provided on the feeding port side, so when copying both sides of the document in succession, it is necessary to eject the previous document and then The next document must be inserted, which requires a lot of processing time.

In addition, if the front and back sides are not copied (copying only one side),
Although it is shown that the document is ejected from the reversing section, the configuration for switching between ejecting the document and guiding it to the document set surface again and the structure of the reversing section are complicated, especially when the document is ejected from the reversing section. Since the leading edge of the original is guided to the paper ejection port while being bent, an extra burden is placed on the original, resulting in damage and jamming of the original.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and it shortens the continuous processing time for double-sided originals, simplifies the structure of the reversing section paper ejection section, and furthermore improves the structure of the gate for distributing the reversed ejection of originals. The main purpose is to propose an automatic document feeder that is installed in the most rational position and is less likely to damage or jam documents.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a document placing table 10, a paper feeding means 12 for sending the document on the document placing table to the document setting surface 4, and this feeding device. A first conveying means 2a, which is made of an endless belt and is capable of forward and reverse rotation, conveys the original sent out by the paper means on a setting surface, and a folding section 20 converts the original sent by the first conveying means from front to back. a second conveyance means 2b connected to the first conveyance means forming a circulation path 5 for inverting and returning the document to the exit end of the first conveyance means; a drive motor that can be driven in forward and reverse directions to rotate the document in the reverse direction and take the original into the first conveyance means;
a paper ejecting port 3 for driving the conveying means of the original and discharging the reversed original on the document set surface from the second conveying means side; A semicircular curved guide body 8 guides the document being transported along the conveyance means, and the base end of this curved guide body moves to a position that blocks the circulation path to send the document to the paper ejection port. The device is comprised of a gate means 14 that moves to a position where it covers the paper discharge port and guides the document together with a curved guide to a circulation path, and a drive means 16 that moves and positions the gate means. .

[Embodiments of the Invention] The configuration of the preferred embodiments shown in the drawings will be described in detail below.

Reference numeral 4 denotes a document setting surface of the main body of the copying machine, in which a normal copying mechanism such as an electrostatic copying optical system is incorporated.

Reference numeral 2a denotes a first conveying means disposed on the inlet side in the feeding direction on the document setting surface 4, and numeral 2b denotes a second conveying means arranged on the outlet side in the feeding direction.

The first conveyance means 2a has a document supply port 1 connected to the document table 10, and the second conveyance means 2b has a document discharge port 3 extending therefrom.
and second conveying means 2a, 2b and document setting surface 4.
A document path from a document supply port 1 to a document discharge port 3 is formed between the document feeder 2 and the document feeder 2 .

The illustrated conveying device 2 has a first conveying means 2a having an endless belt stretched between a pair of front and rear pulleys, and a second conveying means 2b also constituted by an endless belt, on a document setting surface 4 as shown in the figure. Particularly, the second conveyance means 2b has a circulation path 5 that circulates along the endless belt from the document path n between the document setting surface 4 and the document set surface 4, and a series of pressure rollers 7 and a semicircular curved guide. 8, and a communication port 6 that enters between the first conveyance means 2a and the document setting surface 4 from the circulation path 5.

Although not shown, the first and second conveying means 2a and 2b are constructed of multi-striped belts spaced apart from each other, and a document regulating stopper and a document regulating stopper that can freely approach and separate from the document setting surface 4 from between the belt strips. Its operating solenoid (not shown) is disposed on the bottom slope of the machine frame 9.

Reference numeral 10 denotes a document placement table extending to the document supply port 1; 11 denotes an arc-shaped guide disposed on the entrance side pulley of the first conveyance means 2a;
2. It is equipped with an entrance gate 13, etc.

Therefore, the original from the original placing table 10 is pressed against the entrance pulley by the pinch roller 12, and is sent onto the original setting surface 4 by driving the first conveying means 2a.

The original from the first transport means 2a is fed and set at a predetermined position on the original setting surface 4 by the second transport means 2b, and is sent to the original discharge port 3 after the copying process of the main body of the copying machine is completed.

A gate 14 is provided in the document discharge port 3 at a position where the path leading to the paper discharge stacker 15 intersects with the above-mentioned circulation path 5, at a folded back portion of the second conveyance means. This gate 14 is in a first state (dashed line in FIG. 1) in which it enters between the strips of the exit side pulley of the second conveyance means 2b, and in a second state in which it is buried in the recessed part of the document setting surface 4 (FIG. 1). (solid line) and is connected to an electromagnetic solenoid 16.

Further, this gate guides the original together with the semicircular curved guide 8 when the original is reversed along the second conveyance means. Gate 1 at this location
4, when the document is ejected, the document advances in the direction away from the second conveyance means, and no extra load is applied to the document, so that damage to the document can be minimized. Further, when the document is reversed, the document is guided integrally with the semicircular curved guide, so that jamming at this position is eliminated.

Drive motors are individually connected to the first and second conveying means 2a and 2b, and the first conveying means 2a is driven by an inlet pulley, and the second conveying means 2b is driven by an outlet pulley. together with the first conveying means 2
The drive motor on the a side is a reversible motor capable of forward and reverse rotation (not shown).

The original from the original supply port 1 is fed to the entrance end of the original setting surface 4 by the drive of the first transport means 2a, and when the leading edge of the original reaches the second transport means 2b, the first transport means 2a is driven. Then, by driving the second conveying means 2a, 2b, the document reaches the document regulating stopper on the document setting surface 4. (FIG. 2A) The document stopped and set by the document regulating stopper is sent to the document discharge port 3 by the second conveyance means 2b after copying is completed. The gate 14 of the document ejection port 3 is used to set the document on the document set surface 4 as shown in FIG. It is maintained in a buried state by an electromagnetic solenoid 16.

Then, the document is sent by the gate 14 to the circulation path 5 formed around the second transport means 2b, and reaches the communication port 6 formed at the connecting portion of the first and second transport means 2b. (Figure 2b).

When the driving direction of the first conveyance means 2a is reversed when the leading edge of the document reaches the communication port 6, the document is reversely conveyed between the first conveyance means 2a and the document setting surface 4 toward the entrance side of the document setting surface 4. Ru. (FIG. 2C) In this process, the original is turned upside down, and the original is set in the state shown in FIG. It is set on surface 4.

Next, after copying the original on the original setting surface 4, the second conveyance means 2b is driven and the original ejection port 3 is driven.
The gate 14 is maintained in the state shown in FIG. 2D.

Then, the original is stored in the paper discharge stacker 15 through the discharge port 3. At this time, if the next original is set on the original placing table 10, the operation of the first conveying means allows the next original to be fed at the same time as the previous original is ejected.

In the present invention, the second conveyance means 2b may be constituted by an endless belt as shown in the figure, or may be constituted by ordinary conveyance rollers.

[Effects of the Invention] As can be understood from the above description, the present invention includes a document placing table 10, a paper feeding means 12 for feeding the original on this document placing table to the document setting surface 4, and a paper feeding means 12 for sending the document on the document placing table to the document setting surface 4. A first conveying means 2a, which is capable of forward and reverse rotation and is made of an endless belt, conveys the sent original on the setting surface, and a folding section 20 turns over the original, which is fed by the first conveying means. Circulation path 5 returning to the outlet end of the first conveying means
a second conveyance means 2b connected to the first conveyance means forming a second conveyance means; and a drive capable of forward and reverse driving for reversing the first conveyance means and taking the document into the first conveyance means when the document is reversed and returned. The motor rotates the first transport means in the normal direction and rotates the second transport means when exchanging originals.
By having a paper ejection port 3 for driving the conveyance means of the document set surface 4 and ejecting the reversed original on the document set surface from the second conveyance means side, the document can be set on the document set surface 4 forever. The copied original is turned over in the circulation path 5 and set on the original setting surface 4 again. When the document set on the back side is to be ejected, it will be ejected from the paper ejection port on the second transport means side.For example, if the next document is placed on the document tray, the previous document will be The next document can be fed while the next document is being ejected, and both the front and back sides of the document can be continuously copied, reducing processing time and improving copying efficiency.

Particularly, the present invention includes a semicircular curved guide body 8 for guiding the document being transported along the second conveyance means, and a semicircular curved guide body 8 for guiding the document being transported along the second conveyance means, to a folding portion of the second conveyance means that turns the document upside down. It is provided at the base end and moves to a position where it blocks the circulation path to guide the document to the paper ejection port, and moves to a position where it blocks the paper ejection port and guides the document together with the curved guide 8 to the circulation path. Since it is composed of a gate means for guiding and a drive means for moving and positioning the gate means,
It is possible to perform either front-back reversal or paper ejection with a simple configuration, and the structure of the original document reversal section and sheet ejecting section can be simplified compared to conventional ones. In addition, by locating the gate at the base end of the curved guide, when the front and back sides of the original are ejected, the original moves in the direction away from the second conveyance means, so no extra load is applied to the original. Damage to the original can be minimized. In addition, when the document is reversed, it is integrated with the curved guide to guide the document, making it difficult for jams to occur at this position, making it easy to handle, and making it an extremely useful automatic document feeder that can be used in various copying machines. equipment can be provided.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall explanatory diagram thereof, and FIGS. 2A to 2D are explanatory diagrams of the state of use. 2a...First conveying means, 2b...Second conveying means, 3...Document discharge port, 4...Document setting surface, 5...Circulation path, 8...Curving guide, 14...Gate means, 1
6...Solenoid.

Claims (1)

[Scope of Claims] 1. A document placing table 10, a paper feeding means 12 for feeding the original on this document placing table onto the document setting surface 4, and a feeding means 12 for feeding the document fed out by this sheet feeding means on the document setting surface. A first conveyance means 2a consisting of an endless belt capable of forward and reverse rotation, and a document sent by the first conveyance means is turned upside down at a folding section 20 and returned to the exit end of the first conveyance means. a second conveyance means 2b connected to the first conveyance means forming the circulation path 5; and a forward/reverse drive for reversing the first conveyance means and taking the document into the first conveyance means when the document is reversed and returned. and a drive motor capable of rotating the first conveying means in the normal direction and driving the second conveying means when exchanging documents, and ejecting the reversed original on the document set surface from the second conveying means side. a semicircular curved guide body 8 for guiding the document being transported along the second conveyance means; Gate means at the base end that moves to a position that blocks the circulation path to guide the document to the paper discharge port, and moves to a position that blocks the paper discharge port and guides the document together with the curved guide to the circulation path. 1
4, and a driving means 1 for moving and positioning the gate means.
6. An automatic document feeder comprising: