JPH0379567A - Automatic feeding device for original - Google Patents

Abstract

PURPOSE:To eliminate the trouble that jam is generated when the quantity of the originals set at a certain position is small, by installing a guide plate supporting angle varying means for shifting the angle of an original guide surface for the discharge direction of the original according to the quantity of piling of the originals set at a constant position. CONSTITUTION:When the quantity of the originals set at a constant position S is small, if no original exists on an original table 15 when an original P0 is discharged from a discharge port 16, the solenoid 69 of a guide plate supporting angular shift means H is turned on. Then, a link 68 shifts to the position shown by the broken line, and the angle of an original guide plate 63 for the discharge direction of the original P0 shifts by an angle theta to the state shown by the broken line through a supporting angle setting boss 66, supporting shaft 61, and a guide plate installation boss 62. The side edge part on the discharge side of the original P0 permits the discharge to the position close to the end plate 24 of the original table 15 so as to be set along the original guide part of a side plate 25. Therefore, the side edge part of the original is prevented from colliding with the edge of the side plate or intruding into a joint part.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic document feeder used in a copying machine or the like.

(Prior Art) Conventionally, as shown in FIG. 8, a type of automatic document feeding device used in copying machines, etc. includes a document loading means A for setting a document P in a fixed position S, and this document loading means. A document separating means B that blows air toward the side edge Pa on the feeding side of the document P set at a fixed position S by A to lift up the side edge Pa on the feeding side of the document P; A document suction and feeding means C feeds the lowest JjX m Po separated by means B while sucking it with negative pressure, and the document Po fed by this document suction and feeding means C is sent to a processing section. An RH automatic feeding device is known which has a J7KM conveying means for conveying the document toward F, and a document discharging means E for discharging the document PO that has been processed in the processing section F toward the top of the fixed position S. ing.

Here, the document stacking means A includes a document table 15. on which the document P is stacked. The original P loaded on this original table 15
The end plate 24. which aligns the side end pb on the discharge side of the end plate 24. It also includes side plates 25 and the like that align both side edges of the document P along the feeding direction.

The document separating means B, as shown in FIG. 9, is composed of a blower tank 26 having an air nozzle 26a.

The document suction and feeding means C includes a vacuum tank 27a that sucks only the lowest document Po on the document table 15, and a paper feed belt 27c that surrounds the vacuum tank 27a and is rotated by a pair of rollers 27b. It is composed of a bag 5127.

The document conveying means is connected to the first turn paper passing path 28. First turn roller 29. Lateral conveyance path 31. 2nd turn paper path 32. Second turn roller 33. and a conveyance device 35, etc., and conveys the document Po toward a processing section F (in this example, above a platen glass 34 of a copying machine or the like).

The document ejection means E includes a paper ejection port 16. Paper discharge roller 17, common paper passage path 18. and a reversing paper discharge path 19, etc., and the document Po that has been processed in the processing section The document is ejected onto the upper document Pn.

(Problem to be Solved by the Invention) By the way, the conventional automatic document feeding device described above has a blower that moves the document P, which is set at the fixed position S by the document loading means A, toward the side edge Pa on the feeding side. By blowing air from the air nozzle 26a of the tank 26, this original P
The side edge Pa on the feeding side is raised to separate the original P.

Therefore, as shown in FIG. 9, when there are many sets of originals P stacked on the 5-original table 15, the ejecting roller
There was a problem in that the document Po ejected toward the fixed position S due to No. 7 collided with the original Po, resulting in a jam.

As a means to solve this problem, as shown in FIG. If a document guide plate 63 that regulates the floating height of the upper surface of the uppermost document Pn on the feeding side to be lower than the height of the document Po to be discharged is arranged at the portion on the document discharge side above the paper discharge port 6. good. That is, the document guide plate 63
By arranging this, it is possible to prevent the uppermost original lIPn from rising excessively when air is blown at the free end of the original guide plate 63. Paper ejection roller 1
7, the document Po ejected toward the fixed position S is prevented from rear-ending collision and jamming.

However, when such a document guide plate 63 is provided, as shown in FIG. When there is no other document P on the document table 15, the document PO is discharged through the document guide plate 63, with the side end pb of the document PO on the discharge side coming into contact with the document table 15 from this side of the side plate 25. For this reason, this manuscript PO
If the side edge pb of the side plate 25 comes off the document guide portion of the side plate 25 and collides with the edge of the side plate 25, or enters the joint between the document table 15 and the side plate 25, or if the document table 15 is not used. There was a problem where the decals could collide with the edges of the attached decals, causing jams.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a document loading means for setting a document in a fixed position, and a side edge on the feeding side of the document set in the fixed position. A document separation device that blows air toward the document to lift the side edge of the document on the feeding side, and a document suction feeder that feeds the lowest document separated by the document separation device while sucking it with negative pressure. means, a document conveying means for conveying the document fed by the document suction and feeding means toward a processing section, and a document conveyance section for discharging the document that has been processed in the processing section toward the top of the fixed position. In an automatic document feeder having an M document ejecting means, the ejecting direction of the original ejected by the document ejecting means is deflected toward the lowest position of the above fixed position, and the uppermost original set at the above fixed position document guide means having a document guide plate that regulates the flying height of the upper surface of the feeding side to be lower than the height of the document to be discharged; The apparatus further includes guide plate support angle shifting means for displacing the angle of the document guide surface with respect to the ejection direction.

(Function) According to the present invention, the document guide means having the document guide plate 63 controls the document P discharged by the document discharge means E.
o is deflected toward the lowest position in the home position S, and the free end of the document guide plate 63 moves the paper toward the home position S.
The flying height of the upper surface of the feeding side of the uppermost original document Pn set in is regulated so that it is located lower than the paper discharge port 16.

Further, according to the present invention, the guide plate support angle displacement means allows the document guide plate 63 to move in the direction of discharge of the document Po.
The angle of localization i! It is displaced according to the number of sheets of originals P set in S.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The automatic document feeder according to the present invention includes document guide means G and guide plate support angle displacement means H, as shown in FIG.
have.

As shown in FIGS. 2 and 3, the document guide means G has a support shaft 61. Guide plate mounting boss 62. and a document guide plate 63.

The document guide plate 63 is adhesively fixed to the guide plate attachment boss 62. Further, the guide plate mounting boss 62 is connected to the support shaft 6.
1 with mounting screws 70.

Manuscript Guide # here! A plurality of i6Bs are arranged at predetermined intervals with respect to the support shaft 61. This results in
The sliding resistance of the ejected document PO in the direction along the support shaft 61 is approximately equalized, thereby preventing skew during document ejection due to differences in document size.

The support shaft 61 is rotatably supported by a pair of main body side plates 64 of the automatic document feeder via a pair of bearings 65 (one main body side plate 64 and bearing 65 are not shown). ).

On the other hand, the guide plate support angle displacement means H is shown in FIGS.
As shown in the figure, a support angle setting boss 66° pin 67, a link 68. and a solenoid 69.

The support angle setting boss 66 is connected to the outer support shaft 61 of the main body side plate 64.
is fixed to one end of the frame with a mounting screw 80. The pin 67 is additionally provided on the side of the support angle setting boss 66. The link 68 has a negative end pivotally connected to the pin 6 and the other end pivotally connected to the solenoid 69. Solenoid 69 is
It is arranged on the main body side plate 64.

The document guide means G and the guide plate support angle displacement means H configured as described above are configured such that when the solenoid 69 is off, the document guide plate 63 is ejected by the document ejection means E as shown in the first construction drawing. Set the ejection direction of the original Po to the fixed position S.
is deflected toward the lowest position, and the flying height of the upper surface of the feeding side of the uppermost original Pn set in the stereotaxic IS is regulated to be lower than the height of the original Pa to be ejected. It is arranged at a portion of the opening 16 on the document ejection side.

Here, if the document guide plate 63 is made of a flexible member such as mylar, a relatively large amount of documents P is loaded on the document table 15 and the solenoid 69 is turned off. , the free end of the document guide plate 63 is
It is arranged so as to press down on the upper surface of the uppermost document Pn.

Furthermore, if the document guide plate 63 is formed of a member that is not very flexible, such as a thin metal plate, a relatively large amount of documents P will be stacked on the document table 15.

And when the solenoid 69 is off, the document guide plate 63
The free end of is spaced apart from the upper surface of the uppermost document Pn in advance so as not to impair the document separation action of the document separation means B.

In the automatic document feeder configured in this manner, when the solenoid 69 is off, as shown in FIG. Since excessive lifting is prevented, the original P loaded on the yK original table 15 is
There is no possibility that the document Pa discharged toward the fixed position S by the paper discharge roller F will collide with the document Pa and cause a jam.

Further, in FIG. 4, when the solenoid 69 is turned on, the link 68 moves to the position shown by the broken line, and the support angle setting boss 66, the support shaft 61. As shown in FIG. 6, the angle of the document guide plate 63 with respect to the discharge direction of the document Po is displaced from the state shown by the solid line to the state shown by the broken line via the guide plate attachment boss 62. Here, the document guide plate 63
The displacement angle θ is determined by the rotation radius of the pin 67 and the stroke of the solenoid 69.

Therefore, as shown in FIG.
If the set number of sheets is small and there is no other document P on the document table 15 when the document PO is ejected from the paper ejection port 16, the solenoid 69 is turned on and the document guide plate 63
By displacing the angle along the ejection direction of the original PO, the side edge pb on the ejection side of the original Po is moved closer to the end plate 24 of the original table 15 so as to align with the original guide portion of the side plate 25. It can be discharged to the position of

(Effects of the Invention) According to the present invention, even when a large number of originals are stacked on the original table, the original guide plate can prevent the originals from floating excessively due to air blowing. It is possible to prevent a jam from occurring due to a rear-end collision between the original on top and the original being ejected toward the normal position9.In addition, the number of originals set in the normal position is small, and the original is ejected from the paper ejection slot. Even if there are no other originals on the original table, the yK original guide plate allows you to
Since the side edge of the document can be ejected at a position closer to the end plate 1 note, the side edge of the document will not come off the document guide area of the side plate and collide with the edge of the side plate, or the document will It may get into the joint between the table and the side plate, or it may collide with the edge of a decal attached using the original table.
It is possible to eliminate the problem that causes the jam.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention, FIG. 2 is a perspective view of the document guide means of the above embodiment, FIG. 3 is a partial plan view of the above embodiment, and FIG. 4 is a partial plan view of the above embodiment. A side view of the guide plate support angle displacement means, FIG. 5 is a diagram of the operation mode of the above embodiment, and FIG.
The figure is a diagram of the operation mode of the document guide means of the above embodiment, FIG. 7 is a diagram of another operation mode of the above embodiment, FIG. 8 is a schematic sectional view of a conventional automatic document feeder, and FIG. FIG. 10 is a partial sectional view of the conventional automatic document feeding device. 61... Support shaft, 62... Guide plate mounting boss 63...
・Document guide plate, 66...Support angle setting boss, 67...
・Pin, 68・ ・Link. 69...Solenoid, A...Document loading means, B...
・Document separation means, C...Document suction feeding means, D...
Original conveyance means, E: Original discharge means, F: Processing section, G: Original guide means. H... Guide plate support angle displacement means, P... Original, S...
··Fixed position. % zu prisoner %4 figure

Claims (1)

[Claims] a document loading means for setting the document in a fixed position; and a document separating means for blowing air toward the side edge of the document set in the fixed position on the feeding side to lift up the side edge of the document on the feeding side. a document suction and feeding device that feeds the lowest document separated by the document separation device while suctioning it with negative pressure; and a document suction and feeding device that transports the document fed by the document suction and feeding device toward a processing section. In an automatic document feeding device, the document is ejected by the document ejecting means, and the document ejecting means ejects the original that has been processed in the processing section toward the top of the fixed position. deflect the discharge direction of the document toward the bottom of the fixed position, and regulate the floating height of the upper surface of the feeding side of the highest document set in the fixed position to be lower than the height of the document to be discharged. A document guide means having a document guide plate; and a guide plate support angle displacement means for displacing the angle of the document guide plate with respect to the document discharge direction in accordance with the number of documents to be loaded at the fixed position. An automatic document feeder.