JPS6236942B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a document feeding device for a copying machine in which a conveyor belt is provided with a block-shaped document feeding member.

Prior Art Conventionally, in a copying machine in which the original to be copied is conveyed onto a platen by a conveyor belt, a wide one is used.
There are two types: one that uses a single conveyor belt, and the other that uses a conveyor belt that is divided into multiple pieces in the width direction.

The latter method, which uses a divided conveyor belt, can ensure the alignment of the original, but when copying a thin transparent original, there is a problem that the shadow of the belt will be copied on the resulting copy. be.

In addition, the former method, which uses a single wide conveyor belt, has the advantage of preventing belt shadows when copying thin and transparent originals, but on the other hand, it is difficult to place the original against the alignment member. During positioning, part of the conveyor belt lifts up, making the document stop position irregular, or the conveyor belt comes into contact with the entire surface of the platen glass, making it difficult to reliably convey the document, and causing the document to stop at an irregular position. It was difficult to set the manuscript in a range where it would be less damaged.

The present inventor devised a document feeder for a copying machine shown in Figures 1 to 3 that overcomes these difficulties, and filed an application for utility model registration on November 15, 1971 (Utility Model Application No. 156084, 1978). (No. 55-73951).

In the document feeding device shown in FIGS. 1 to 3, a wide conveyor belt c is stretched around a pair of rollers b so as to be parallel to the platen glass a with a predetermined gap. Two groups of document feeding members d each having four document feeding members d having approximately the same thickness as the gap and a constant width are protruded from the surface of the conveyor belt C so as to be positioned at constant intervals in the width direction, and the conveyor belt c A member e is provided so as to be positioned between the document feed member d on the delivery side of the document feeder d, and after inserting the document f to be copied between the platen glass a and the conveyor belt c, When the document f is rotated by a predetermined rotation angle, the document f is pushed and conveyed by the document feed member d, and is stopped at a predetermined position by the alignment member e.

Problems to be Solved by the Invention However, since the document feeder is not provided with a discharge roller, the document f may curl and be affected by the wind, or the document f may end up behind the previous document f at the end of the document discharge tray g. The edge fr remains, and the front edge ff of the next document f
There were cases where the document f got under the trailing edge fr of the document, causing the pages to be out of order, or the document f to be completely cluttered.

Conventionally, there is a document feeder in which a block-shaped elastic piece is fixed to the conveyor belt in its front half, but its purpose is to ensure alignment on the document table; The method of transporting the original is to press the original between the rear part of the elastic piece and the transport belt, and transport the original.
Therefore, the document carrying means is located above the circumferential part of the roller where the conveyor belt goes around downward, and when the rear half of the elastic piece is separated from the conveyor belt at the circumferential part of the roller, the separated part (the elastic piece and the conveyor belt) The structure is such that the original is fed from above between the two parts.

Therefore, it cannot be applied to a structure in which a document is carried into a document table substantially parallel to the document table (many document feeders have this structure).

Means and Effects for Solving the Problems The present invention has been made in view of the above points, and an object thereof is to reliably carry in and out a document that is carried in substantially parallel to the document table. The present invention provides a document feeding device.

Therefore, in the present invention, a document is conveyed while pressing the document against the document table 1 by a document feed member 4 made of an elastic body protruding in the form of a block along the surface of the document conveyance belt 3 which is stretched between a pair of rollers 2. In the document feeding device, the front half of the document feeding member 4 is fixed to the document conveying belt 3, and the rear half 4a of the document conveying member 4 extends along the conveyance direction of the document conveying belt 3.
is separated from the document conveying belt 3, and further includes a carrying means 9 extending substantially parallel from the document placing table 1 and carrying the document between the document placing table 1 and the document feeding member 4. be.

Therefore, the carrying means 9 moves the document placing table 1
When an original is carried between the original transporting member 4 and the original transporting belt 3, the original is transported between the original transport belt 3 and the original placing table 1.
Even if the document feed member 4 is not inserted into the nip of the roller 2, when the document feed member 4 comes to the circumference of the roller 2, the separated rear end 4a is separated from the roller 2 due to its elastic force. Rear end 4 of the document feeding member 4 away from the circumferential surface of the roller
At step a, the original is pressed against and gripped by the original placing table 1, so that the original is reliably fed onto the original placing table 1.

Furthermore, when the document is ejected, if the trailing edge of the document is pushed by the document feeder 4 and reaches near the ejection end, the rear end 4a of the document feeder 4 separates from the circumference of the roller, and the document The trailing edge is pushed out, so that the document is reliably ejected even without an ejection roller.

As described above, according to the document feeder of the present invention, the document is reliably carried in and out.

Embodiment An embodiment of the present invention shown in FIGS. 4 to 7 will be described below. Reference numeral 1 denotes a platen glass serving as a document mounting table with an optical scanning system (not shown) built in below. A wide conveyor belt 3 is stretched around a pair of rollers 2 so as to be parallel to the upper surface of the glass 1 with a predetermined gap. It is designed to be rotated clockwise.

In addition, two opposite ones in the longitudinal direction of the conveyor belt 3
At these locations, four block-shaped original feed members 4 having substantially the same thickness as the gap are protruded across the width of the belt 3 at equal intervals.

As shown in FIGS. 5 and 6, a hole 5 is provided in the belt 3 near the rear end 4a of the document feed member 4, and the rear end 4a of the document feed member 4 is located on the surface of the belt 3. It is bent at an angle so that it protrudes further outward.

Further, on the discharge side of the platen glass 1, an alignment member 6 is pivotably supported vertically about a shaft 7 so as to be located approximately in the middle of the width direction interval of the document feeding member 4. As shown in FIG. 4, the tip of the alignment member 6 is in contact with the belt 3, and when the original 10 is ejected, it is driven to be switched up and down so that it is at the same height as the top surface of the platen glass 1. It's summery.

Furthermore, a document discharge tray 8 is provided adjacent to the alignment member 6, and a document transfer table 9 is provided on the transfer side of the platen glass 1.

The embodiments shown in FIGS. 4 to 7 are configured as described above, so that after inserting the document into the platen glass 1 from the document loading table 9 manually or using a document loading device (not shown), the roller 2 is rotated clockwise. When the document 10 is rotated in this direction, the document 10 is transferred to the left while being pressed against the upper surface of the platen glass 1 by the block-shaped document feeding member 4.

Then, the leading edge 10f of the original 10 is aligned with the positioning member 6.
When it hits, the operation of a detection device (not shown) causes the
The roller 2 is automatically stopped and the required exposure scanning is performed.

When the required copying is completed, the alignment member 6
is swung downwards around the shaft 7, and the roller 2
is rotated clockwise again, and the document 10 is ejected onto the ejection tray 8.

Furthermore, when inserting the original 10, even if the front end 10f of the original 10 is not located in the space between the platen glass 1 and the flat part of the conveyor belt 3 as shown in FIG. The edge 4a presses the front edge 10f of the document, and the document 10 is reliably conveyed to a predetermined position on the platen glass 1.

Furthermore, when the document 10 is ejected, as shown in FIG. The trailing edge 10r of the document is pushed forward, and the document 10 is placed on the output tray 8.
is completely expelled into the

As described above, according to the embodiments shown in FIGS. 4 to 7, the original 10 can be carried in and carried out reliably.

In addition, since the original 10 is completely ejected into the output tray 8, the pages of the original 10 may be out of order, and the original 10 may be
curling is prevented.

In the above embodiment, the hole 5 is formed around the rear end 4a of the document feeding member in the belt 3, but the hole 5 may be formed so that the rear end 4a of the document feeding member is separated from the surface of the belt 3, as shown in FIGS. Almost the same effects as the embodiment shown in FIG. 7 can be achieved.

Although the present invention has been described above with reference to the embodiment illustrated in the drawings and other embodiments, the present invention is of course not limited to such embodiments, and various modifications may be made without departing from the spirit of the present invention. The design can be modified.

Effects of the Invention In the present invention, by providing a simple document feeding member on the conveyor belt, it is possible to reliably carry the document into and out of the document table, thereby avoiding problems caused by paper jams and making it possible to perform smooth copying operations. do.

Since the structure is simple, cost increases can be avoided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conveyor belt in a document feeding device of a conventional copying machine, FIGS. 2 and 3 are enlarged views of important parts of an example of carrying out and an example of carrying in, and FIG. 4 is a diagram of a copying machine according to the present invention. A side view illustrating an embodiment of the document feeder, FIG. 5 is an enlarged longitudinal cross-sectional view of the main part thereof, FIG. 6 is a view taken along the - arrow in FIG. 5, and FIG. 7 is a side view of the main part when the document is inserted. It is. 1...Platen glass, 2...Roller, 3...
...Conveyance belt, 4...Block-shaped document feeding member,
5... Hole, 6... Positioning member, 7... Shaft, 8...
...Document output tray, 9...Document loading table, 10...
Manuscript.

Claims (1)

[Claims] 1 A document feeding device that conveys a document while pressing it against a document mounting table 1 using a document feeding member 4 made of an elastic body protruding in the form of a block along the surface of a document conveying belt 3 stretched between a pair of rollers 2. , the front half of the document feed member 4 is fixed to the document conveyance belt 3, the rear half 4a of the document feed member 4 along the conveyance direction of the document conveyance belt 3 is separated from the document conveyance belt 3, and then the document placement table is fixed. 1. A document feeding device comprising a carrying means 9 extending substantially parallel from the document placing table 1 and carrying a document between the document placing table 1 and the document feeding member 4.