JPS5913254A - Automatic original feeder - Google Patents

Abstract

PURPOSE:To correct the inclination of an original to a copying machine frame easily and quickly, by adjusting the inclination of a stopper for stopping the original. CONSTITUTION:The stopper 37 is turnable around a supporting shaft 38 and its tip part 37a is pressed against a platen glass plate 35 at specific pressure. The supporting shaft 38 is supported turnably and pivotally on the front and rear side plates 40 and 41 of an original conveyance unit 4. The rear side plate 41 is only supported rotatably and pivotally, but the front side plate 40 is supported through longitudinal adjustment plates 42 and 43. Those plates 42 and 43 are adjusted to vary the inclination of the supporting shaft 38. The front side plate 40 has a vertically and horizontally movable hole and a plate 43 having a similar hole is fixed thereto with attachment screws so that their holes are aligned to each other. The attachment screw hole of the plate 43 is longitudinally long, so a longitudinal adjustment is made. Then, a plate 42 is fixed thereupon with attachment screws. The plate 42 has the laterally long hole and allows a lateral adjustment. Thus, the lateral and longitudinal adjustments are made through the plates 42 and 43.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mounted on a copying machine and works in conjunction with the copying machine to automatically feed multiple originals one by one to an imaging location (on a platen glass plate) for copying work. This invention relates to an automatic document feeder that saves one hour of labor.

Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 1 shows an overall perspective view of a copying machine equipped with an example of the automatic document feeder of the present invention, FIG. 2 is a rear perspective view of the main parts thereof, and FIG. 3 is a back view of the main parts thereof.

In these drawings, 1 is a copying machine main body, in which an automatic document feeder 2 according to the present invention including a document separation unit 3 and a document transport unit 4 can be rotated to open and close in the directions of arrows A and B. Equipped. Note that a tray 16 is detachably attached to the document separation unit 3, and on which the required number of attached documents to be copied can be stacked and placed.

Here, the document separating unit 3 and the document conveying unit 4
As shown in FIG.
The rear part is pivoted like a J-Noh.

= The fixed board 5 is made of an iron plate with an L-shaped cross section,
It is fixed to the rear upper edge of the copying machine main body 1 by a plurality of fixing screws 6a and 6b. The fixing holes 51a and rslb drilled in the fixing board 5 are elongated holes that are long in the direction of conveyance of the original as shown by the arrow F. An eccentric cam 7 capable of rotating τj1 around a fixing screw 6a, and its eccentric shaft y
Several cam followers SA and SB are integrally arranged side by side on the fixed substrate at approximately the same distance as the outer diameter of the cam 7. - As clearly shown in FIG. 3, the eccentric cup 7 has a groove 7a into which a screwdriver or the like can be inserted and easily rotated in the direction of arrow C1D.

Therefore, by rotating the eccentric cam 7, the fixed substrate 6 can be moved in the direction F of conveying the document relative to the main body 1 of the copying machine;
The position in the opposite direction F' can be easily finely adjusted.

As shown in FIG. 4, part of the document separation unit 3 includes a paper feed roller 91 and a separation rubber unit 10. ΦFeed protection 111 member 11.1
Pair of delivery rollers 12a, 12b, first sensor 1
3, the second sensor 14 and the tray 16 are included. The tray 15 has fixing screws 52 as shown in FIG.
A and 52b are fixed to the side wall of the document separating unit 3. Fixing hole 5 drilled in L tray 16
3a and 63b are G and G' perpendicular to the conveying direction of the original.
The hole is long in the force direction - this allows the tray 16 to
) The position of the Q1 high separation unit 3 can be easily adjusted.

Further, as shown in the top view in FIG. 6 and in the side view in FIG.
A document support plate that is rotatable around e as a fulcrum.
It is equipped with 27. The function of this document support lever 27 will be described later.

As shown in Fig. 8, the separation gono unit 1o includes a press plate 17 fixed to a rotatable support 16, and its press mark AM1.
Consisting of a separate go/・18 fixed to 7, support +1
illll 16 k: The separation rubber 18 is always pressed against the paper feed roller 9 with a predetermined pressure by a spring 2o applied to a lever 19 that is integrally provided at both ends of the support shaft 16 as a fulcrum. It is composed of

Set the tray 15 at an angle of about 3o with respect to the horizontal plane,
By keeping the inclination of the tray 18 approximately horizontal, the tray 15
The document 60 stacked on -1- is brought into contact with the paper feeding low sheath 9ν.

Here, if the size of the document 60 in the conveying direction is larger than the tray 15, as shown in FIG.
．． After turning, the &M may droop, which may create resistance and prevent the leading edge of the document 60 from coming into contact with the paper feed roller 9. In such a case, the document-supporting lever 27 described above may be used.
By taking out the document from the tray 15 and supporting the rear end of the document, the leading edge of the document comes into contact with the paper feed roller 9.

The materials of the paper feed roller 9 and the separation rubber 18 are selected so as to have the following relationship. In other words, the relationship is (coefficient of friction between originals) <(coefficient of friction between separating rubber and originals) <(coefficient of friction between paper feed roller and originals). Neoprene sponge is used as the material for the rubber paper feed roller.

The double feeding prevention part 11 is located at the edge 11a of the first part, as shown in Fig. 9.
are provided close to both side ends of the separating rubber 18.
, the upper edge portion 11a is configured to be at the same level as, or slightly higher than, the arm surface portion 18a of the N1 gono 18. If there is no application 5J month 19th part 4A11,
The original Φ of the original is applied to all the parts 11 and 18, the outer circumference of the pressing plate 17, and the units 71 and 10.

Resisting the pressing force of the suppressing plate 17-, the portions 11 and 18 and the paper feed roller 9 are deflected by the bait 11jl, and the submission of the feed 11 is bent.

In order to prevent this from 11-1, set 1' and f of ΦJ
y, If/month 1 part A'A11 is received at the upper edge 11a.

Further, a gap is maintained between the feed roller 9 and the paper feed roller 9, which is sufficient to allow the document to run. As a result, the weight of the document is directly applied to the separation rubber unit 10, so that the pressure on the paper feed roller 9 does not fluctuate. Still, when setting a document on the tray 16, the pressure does not change even if it is pushed hard.

In FIG. 8, reference numerals 22 and 23 indicate release levers provided at the front and rear, respectively, which are rotatably provided at predetermined intervals around the fulcrum pin 24, and one end of which is attached to a pin tightened by the lever 19. 21, and the shaft end of the delivery roller 12b is rotatably attached to the other end. Further, the force release lever 22 has a heir 26 at one end so that it can be operated from the outside, and by pushing this, the one-separation rubber unit 10 is separated from the paper feed roller 9, and at the same time, the feed roller 12b is started to feed. It is spaced upward from the roller 12a, so that when a document becomes jammed, it can be easily removed.

Next, the configuration of the document transport unit 4 will be explained. In FIG. 4, a belt 30 is placed between a driving pulley 31 and a driven pulley 32, and a tension roller 33 applies a predetermined tension to the belt. A belt height setting roller 34 keeps the bell 30 at a predetermined distance from the platen glass plate 36 on the main body 1 of the copying machine. 36a
, 36b.

36c is a belt pressing roller, which presses the belt 30 against the platen glass plate 36 by its own weight.

These belt suppression rollers 36a to 36c are arranged at intervals shorter than the length of the smallest document to be conveyed in the running direction. Also, a feed roller 12a in the document separation unit 3.

12b and the belt suppression roller closest to it, i.e. 3
6a are also provided at similar intervals.

A stopper 37 is rotatably provided around a support shaft 38, and its tip 37a is always pressed against the platen glass plate 35 with a predetermined pressure by a spring (not shown). Further, the support shaft 38 is integrally provided with a roller pressing spring 39 at the center thereof. The end of the roller suppression spring 39 is normally connected to the belt suppression roller 3 closest to the stopper 37.
It is close to the shaft of 6c with a predetermined gap, and the support shaft 38
By rotating clockwise, the spring 37 moves away from the platen glass plate 35, and at the same time, the roller pressing ratio spring 39 pushes the belt 3 through the belt pressing roller 36.
o is pressed against the platen glass plate 36.

As shown in FIGS. 1o and 11, both ends of the support shaft 38 are rotatably supported by a front plate 40 and a rear plate 41, which form the frame of the document transport unit 4. As shown in FIGS. Here, the rear side plate 4o only rotatably supports the support shaft 38,
The front plate 4o rotatably supports a support shaft 38 via a horizontal adjustment plate 42 and a vertical adjustment plate 43. By adjusting these adjusting plates 42 and 43, the inclination of the support shaft 38 can be changed.

That is, the front plate 4o is provided with a hole through which the support shaft 38 passes, and which is large enough to cause no hindrance when moving horizontally. The direction adjustment plate 43 is fixed with mounting screws so that the holes are aligned. Since the mounting screw hole of the vertical adjustment plate 43 is a long hole in the vertical direction, the vertical adjustment plate 43 can be adjusted up and down. next.

A lateral adjustment plate 4 on which a support shaft 38 is rotatably supported
Fix 2 with the mounting screw. The mounting screw holes at this time are elongated in the lateral direction, so that the lateral adjustment plate 42 can be adjusted in the left and right directions. Therefore, when adjusting in the vertical direction, it is enough to move the vertical adjustment plate 43, and when adjusting in the horizontal direction, it is enough to move the horizontal adjustment plate 42, and adjustment can be made in any one direction. can.

In FIG. 4, 44 is a discharge roller, which is provided coaxially with the driven pulley 32. The diameter of this discharge roller 44 is made larger than the diameter of the driven pulley 32. 45 is a discharge suppression roller, and discharge roller 4
4 and cooperates with the discharge roller 44 to release the guide plate 46.
The document is sent out along the following lines. A sensor 47 detects whether or not the original has been ejected, and is provided at a position 1h'' near the 11th original ejection 161.

Reference numeral 48 denotes a guide bar, which guides the document JJI output from the document discharge port 61 onto the collection table 49 . Reference numeral 60 denotes a document stopper that stops the leading edge of the document ejected from the document ejector 11 161 and stops it on the collection table 49.
JL height is now the same.

Next, the operation of this embodiment will be explained.

A plurality of documents 60 placed on the tray 15 are placed in the first
IJ--13, the paper feed roller 9 is rotated clockwise in FIG. By keeping the paper feed roller 9 and the separation rubber 18 in the relationship described above, only one sheet is separated without being jammed. .Delivery [70-ra 12a,
When the document 12b catches the document and sends it out, the second sensor 14 detects the document, and the paper feed roller 9 stops rotating.

The driving boob IJ-32 of document conveyance--"-)) 4 starts rotating at the same time as the paper feed roller 9 and drives the perl l-30. The belt 30 starts rotating and the platen glass plate 36 side loosens. The belt 30 is in slight contact with the platen glass plate 35.

The document sent out from the sending rollers 12a and 12b is sent over the platen glass plate 35 toward a predetermined position by the belt 30. The belt 3° further includes belt suppressing rollers 36a and 3eb.

36c ensures that the original is transported. The document conveyed over the platen glass plate 36 by the belt 30 is stopped by a stopper 37. The driving pulley 31 continues to make one revolution for a sufficient period of time from when the document starts to be fed from the tray 15 until it reaches the stopper 37.

When the original is stopped by the stopper 37, the original has reached the predetermined position, and the copying machine main body 1
Start the copy operation. If the V document is not in the correct position, the copied image will be distorted, which is a problem. Below, we will explain how to adjust the document to reach the correct position.

If the copied image is deviated in the traveling direction of the original, the eccentric cam 7 is rotated to finely adjust the position of the fixed substrate 5 relative to the copying machine main body 1, as described above. As a result, the position of the stop edge: -37 changes, and therefore the position where the document stops also changes, resulting in a sharper image.

If the copied image is misaligned in the direction perpendicular to the traveling direction of the original, by adjusting the mounting position of the tray 16, the traveling position of the original is changed and the correct image is produced.

If the copied image is diagonally shifted, move the horizontal adjustment &42 to adjust the angle (-37) and correct the misalignment of the original.

When the copying operation by the copying machine main body 1 is completed, the support shaft 38
rotates, and at the same time as the stopper 37 separates from the platen glass plate 36, the roller suppressing spring 39 presses the belt 3o against the platen glass plate 35 via the belt pressing roller 36c. The belt 30 rotates a little later than the stopper 37, and the document on the platen glass plate 36 is advanced by the belt 3o pressed against it. Since the roller pressing pin 39 is provided at the center of the support shaft 38, the center of the belt suppressing roller 36c is pressed, and the belt 30
It is pressed so that it applies even pressure to the document. In this way, the manuscript moves forward reliably.

The leading edge of the document is placed between the ejection roller 44 and the curling press roller 4.
If it gets caught between 5 and 5, then the original will be on the belt 3o.
Regardless of the speed of the discharge roller 44, the discharge roller 44 rapidly sends out the paper toward the recovery table 49. - The time during which the spindle 38 rotates, the stopper 37 is separated from the platen glass plate 36, and at the same time the roller pressing roller 39 presses down the belt pressing roller 36C is slightly longer than the time it takes for the document to pass through the pages of the stopper 37. After that, the state returns to the normal state, and the next document to be fed is stopped by the stop-no-see 37.

Next, the copying machine main body 1 performs a copying operation, and when this is completed, the original on the platen glass plate 3 is ejected from the original ejection port 61, and the next original is fed in.

The above operation is repeated until there are no more originals on the tray 16, and when the last original is ejected from the platen glass plate 35, only the original transport unit 4 operates.

As is clear from the above description, the present invention has an excellent advantage in that the inclination of the stopper that stops the original can be adjusted, so that the inclination of the original with respect to the main body of the copying machine can be easily and quickly corrected. It is something.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of an automatic document feeder of the present invention combined with a copying machine, and FIGS. 4 is a schematic sectional view of the main parts of the embodiment, FIG. 5 is a perspective view of the embodiment as seen from the right side, FIG. 6 is a top view of the tray portion of the embodiment, and FIG. 7 9 is a schematic front view of the same Trenit, FIG. 9 is a perspective view of a main part of the document separation unit, and FIGS. 10 and 11 are a perspective view of a main part and an exploded perspective view of a main part of the document transport unit of the same embodiment. . 2...Automatic document feeder, 3...Document separation unit, 4...-Document transport unit, 15
...Tray, 35...Platen glass plate, 3.....Stopper, 38...Spindle, 4o...Front side plate, 41 ...Rear side plate, 42... Lateral adjustment plate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 5 Figure 915a 'l51011'' □

Claims (3)

[Claims] (1) Multiple sheets of originals placed one on top of the other in a predetermined location
a document separating means for separating sheets one by one and feeding them one after another, and a document conveying means for conveying the document sent out from the document separating means to a predetermined position on a platen glass plate and stopping it with a stopper, and An automatic document feeder characterized in that the stopper is provided at least parallel to a platen glass plate surface so that its inclination can be adjusted. (2) The stopper is rotatably provided around a support shaft, and the tilt of the support shaft is adjustable at least parallel to the platen glass surface. ) The automatic document feeder described in section 2. (3) The document conveying means includes a front plate and a rear plate that rotatably support the support shaft, and the rear plate is configured to rotatably support the support shaft, and the front plate is configured to rotatably support the support shaft. The side plate rotatably supports the support shaft via an adjustment plate, and is configured to be adjustable in displacement parallel to the platen glass plate surface. 2)
Automatic document feeder as described in section.