JPS6136733A - Sheet original feeding device - Google Patents

Abstract

PURPOSE:To constitute a reliable and simple DF device with an inexpensive and simple structure by constituting the device of an original feeding member, which is turned in accordance with movement of an original platen, and an original peeling member which is moved to be brought into and be separated from the original platen. CONSTITUTION:An original feeding device A is brought down on the surface of an original platen 2 of an image processing device B, and an original Os is inserted from an original leading-in entrance 40 and has the front end caught by the device A. When the original platen 2 is moved in this state in the direction where the original is carried to a picture reading part 1, and the original Os is led automatically without slip at the same speed as the moving speed of the original platen while being pressed to the surface of the original platen by the original feeding member and passes the reading part 1 and is subjected to image processing by the image processing device B. An original peeling member 24 which is pulled up into an aperture 16 when it is not operated falls and is brought closely into contact with the original platen 2 and peels the original to eject it from an ejection exit 41. Thus, the high-reliability simple DF device is constituted with the inexpensive simple constitution.

Description

Detailed Description of the Invention A. Object of the Invention [Industrial Application Field] The present invention provides an apparatus t ( The present invention relates to a document feeder (hereinafter abbreviated as DF device).

[Conventional technology]

The DF device is extremely effective in streamlining copying work, etc., and the DF device has a system in which sheet originals are manually fed into the DF device, and is equipped with a separate feeding mechanism for individual sheets. A system that automatically introduces sheet originals stacked in the introduction section one by one from the top or bottom, a circulation feeding system that automatically transports discharged originals back to the document introduction section, and double-sided images. Various systems and mechanical configurations are in use, including one equipped with an automatic re-feeding mechanism for reversing documents.

On the other hand, when it comes to copying machines, for example, the image processing device that is this machine is a portable, small, lightweight, low-priced light model called a personal type, compared to the general large and medium-sized models. has been developed and commercially available, and is becoming widespread.

[Problem that the invention seeks to solve]

However, by equipping a lightweight model such as a personal type with a DF device, copying operations can be made more efficient.

However, conventional DF devices were originally developed for use in high-quality, general-purpose image processing devices, and are themselves quite complicated, high-grade, and expensive devices, and are too expensive to be applied to lightweight models. Functionality is too high-class and expensive, and it is inappropriate.

Therefore, it is strongly desired to develop a simple and inexpensive F device that has a simple mechanical configuration, is highly reliable, and is suitable for use by attaching it to a light image processing device such as a personal type. ing.

It is an object of the present invention to provide a simple DF device that can fully meet this demand, and is particularly a practical DF device of the type that can be applied to an image processing device with a movable document table.

Summary: Structure of the Invention [Means for Solving the Problems] That is, the present invention has an image processing device that is fixed to a main body of an image processing apparatus having a movable document table, can be freely raised and tilted with respect to the surface of the document table, and when the document table is in a reclined state. A tilting member located facing at least the image reading section of the main body of the image processing apparatus with the image processing apparatus in its center is in contact with the document table surface when the tilting member is in a tilted state relative to the document table surface, and is driven to rotate or rotate as the document table moves. a sheet document feeding member for feeding the sheet document, a document introduction port for introducing the sheet document between the sheet document feeding member and the document table surface that is in contact with the V;
a sheet original separation member that comes into contact with the original platen surface when the tilting member is in a tilted state relative to the original platen surface, and separates the sheet original that has passed through the image reading section from the original platen surface by cooperation of the movable original platen and the sheet original feeding member; The gist of the present invention is a sheet document feeding device characterized by comprising a discharge port for sheet documents peeled off from a document table surface.

[Effect]

Set the above-mentioned sheet document feeding device in a tilted state against the document table surface of the main body of the image processing device, insert the sheet document from the document introduction port, and place the leading edge of the sheet document between the document table surface and the sheet document feeding member. Put it in your mouth. In this state, the main body of the image processing device operates to move the document table in the direction of conveying the document to the image reading section! When the II drive is performed, the inserted sheet original is pressed against the original table surface by the sheet original feeding member and moved at the same speed as the moving speed of the original table due to cooperation between the moving original table and the sheet original feeding member. In other words, the sheets are automatically drawn in between the document table and the document feeding member one after another without causing any misalignment between the sheets and the document table surface, and the image reading unit position is sequentially changed while in close contact with the moving document table surface. During the process of passing through the image reading unit position, images on the document surface are sequentially read from the leading edge side to the trailing edge side, and image processing such as copying is performed in the main body of the image processing apparatus. Then, the automatically fed original passes through the leading edge side or the image reading unit position, and when it reaches the sheet original peeling member position, it is sequentially peeled off and separated from the original table surface, deflected and guided toward the ejection port, and then placed on the document table. As the sheet moves, it is finally completely discharged from the sheet document feeding device through the discharge port.

〔Example〕

Fig. 1 is a partially cutaway external shoulder view of the DF device portion of image processing device A equipped with DF device A according to the present invention, Fig. 2 is a longitudinal sectional front view including image processing device B, and Fig. 3 4 is an enlarged sectional view of the mode switching piece, and FIG. 5 is a plan view of the DF device with the cover plate removed.

(1) Image Processing Apparatus B The image processing apparatus B (FIG. 2) of this example is a drum-type electronic copying machine with a movable document table that follows the Carlson process. 50
is a device outside the copying machine, and has copy execution devices 51 to 62 built therein. That is, 51 is a photosensitive drum that is rotated at a predetermined circumferential speed in the direction of the arrow around a shaft 51a, and is uniformly charged positively or negatively by a charging device i52 → document illuminating device 5
3 and a short focal length lens array (trade name SELFOC) 54 to expose the original image (slit exposure) → toner development of the electrostatic latent image formed on the drum surface by the developing device 55 → charging device for transfer of the toner developed image The process of transferring the toner image to the transfer material by 56 → fixing the image by the fixing device 59 on the transfer material that has received the toner image transfer is executed, and the copy is delivered to the discharge port 6.
3 to a copy tray 64 outside the machine. 57 is a cleaning device that cleans the drum surface after the toner image has been transferred; 58 is a conveying device that introduces the transfer material that has passed through the image transfer section and has been separated from the drum surface to a fixing device; 60 is a device that is installed and removed from the copying machine. This is a free transfer material cassette, and the transfer materials loaded and stored in the cassette are fed out one by one by a paper feed roller 61, and introduced between the drum 51 and the transfer charging device 56 via a pair of registration rollers 62. be done.

Reference numeral 65 denotes a top plate of the device 50 outside the copying machine, 1 is a document exposure slit hole as an image reading section formed in the width direction of the face plate at approximately the center of the top plate, and the photosensitive drum 51 is located below the slit hole 1. The longitudinal axis of the slit I/hole 1 and the generatrix of the photosensitive drum 51 are parallel to each other. Furthermore, the short focal length lens array 54 is connected to its slit hole l and the photosensitive drum 51.
It is located between. The original illumination device 53 uniformly illuminates the slit hole 1 portion from below in each longitudinal section.

Reference numeral 2 denotes a transparent plate such as a glass plate, which is disposed above the top plate 65 of the external device of the copying machine and can be slid freely in the left and right direction on the top plate via guide rails 5 and 6 (Figs. 1 and 3). It is a flat plate type movable document table. Specifically, a metal plate 3 and a relatively wide extension plate 4 are provided on the front side part and the bottom side of the manuscript table 2, and the edge member 3 and the extension plate part 4 are respectively connected to the top plate. 65 so as to be supported via left and right guide rails 5 and 6.

The document table 2 indicated by L is always on standby with its home position at the solid line foot position in FIGS. 1 and 2, which is within the surface area of the top plate 65 of the external device of the copying machine. Each time a copy start signal is issued from a control circuit (not shown), a reciprocating drive mechanism (not shown) such as a pinion rack mechanism or a cable mechanism operates to move the top plate 65 to the right in FIG. The forward movement a is made until reaching the forward movement end point Fia shown by the two-dot chain line, and then the backward movement is immediately made to the left in the opposite direction. This backward movement of the document table continues until the document table passes the initial home position and reaches the end point of the backward movement indicated by the three-dot chain line on the right. Immediately upon reaching the end point wb of the backward movement, the movement is again changed to the forward movement a and returned to the initial home position, completing the reciprocating cycle and entering a standby state.

Here, for convenience, the forward movement of the document table 2 from the home position to the forward movement end point position a and the forward movement from the backward movement end point position b' to the home position are referred to as the first half forward movement and the second half forward movement of the document table 2, respectively. It is called.

Reference numeral 7 denotes a rail strip formed longitudinally on the upper surface of the extension plate portion 4 of the document table 2 in the direction of movement of the document table, and reference numeral 8 refers to a stationary member 66 integral with a device outside the copying machine on the opposite side of the extension plate portion 4. The rail strips 9 formed in the direction of movement of the document table, and thus parallel to the rail strips 7 above, engage with the two rail strips 7-8 shown in "L" through engagement rail strips to-11, respectively. A slide plate that can freely slide along the rails 7 and 8, 12
is a document holding plate which is connected to the document table 2 side of the slide plate 9 via an extension plate 12A so as to be freely tiltable and tiltable with respect to the document table 2 around a shaft 13. It consists of a relatively thick hard material layer 12b such as a synthetic resin sponge attached to the side and a white sheet 12c such as EVAL sheet attached to the lower surface of the layer 12b, and can sufficiently cover the entire upper surface area of the document table 2. It has the size that can be used.

(2) The sheet mode/book mode switching mechanism 14 is in a sheet mode switching state in which the slide plate 9 to which the document holding plate 12 is connected is locked to a fixed member 66 integrated with the main body of the copying machine. This is a mode switching top that can be selectively switched to three states: a book mode switching state where it is locked on the z side, and a neutral state where it is not locked on either the immovable member 66 side or the document table 2 side.

The mode switching piece 14 is located approximately at the longitudinal center of the slide plate 9, and the finger hook has a knob 14a that protrudes from the top side of the slide plate, and the lower end of the knob 14a is provided with integral first and second locking pieces 14bII14C. Engagement rail lO on the back of the slide plate
11, and is freely slidable along the guide slot 15 in the width direction of the slide plate 9, that is, in a direction substantially perpendicular to the slide direction along the rail lines 7 and 8 of the slide plate 9. Move the knob 14a along the guide hole 15 to the document holding plate 1.
The knob position when moved to the hole end position on the opposite side to the 2 side is the sheet mode switching position S, and conversely, the knob position when moved to the hole end position on the document holding plate 12 side is the book mode switching position B. The intermediate position between the above two is the neutral position N.

When the knob 14a is located at the neutral position N, the first locking piece 14b of the mode switching piece 14 and W42
14c is not secured to either the stationary member 66 side or the document table z side, and the slide plate 9 (i.e., document holding plate 12) is not attached to the document table 2 or the copying machine main body along the rails 7 and 8. On the other hand, you can freely slide and move it in the left and right directions.

The knob 14a is positioned at the neutral position N, the slide plate 9 is moved along the rail line 7φ8, and the document holding plate 12 is moved against the document table 2 which is in the standby position at the home position.
When the knob 14a is slid to the seat mode switching position S in the state 8 (Figs. 1 and 2) in which the
The tip of the locking piece 14b of l passes through the hole 11a formed on the side surface of the engagement rail strip 11 and connects to the rail strip 8 on the stationary member 66 side.
It is in a state where it is fitted into the notch 8a formed on the side part.

As a result, the slide plate 9, that is, the document holding plate 12, is in a state S (sheet mode switching state S) in which the slide plate 9, that is, the document holding plate 12 is integrally locked with the immovable member 66 side, that is, the copying machine main body side, and when the document table 2 is moved and driven, the document holding plate The plate 12 does not move, and only the document table 2 is driven to move.

■ When the knob 14a is slid to the book mode switching position B, the tip of the second locking piece 14C of the frame 14 passes through the hole 10a formed on the side surface of the engagement rail 10, and connects to the extension plate 4 side of the document table. It is in a state where it is fitted into the notch 7a formed on the side of the rail strip 7. As a result, the slide plate 9
In other words, is the document holding plate 12 a document table? When the original platen 2 is moved and driven, the original holding plate 12 also moves together with the original platen 2.

(3) DF device A The DF device A of this embodiment uses the document holding plate 12 described above also as an up/down member, and is assembled approximately at the center of this document holding plate.

Reference numeral 16 denotes a slit opening formed in the width direction of the chain plate approximately at the center of the document holding plate 12, and this slit 5 opening positions the document holding plate 12 relative to the document table 2 which is in a standby position at the home position. Align and turn knob 14 & to seat mode S
Or, when the document holding plate 12 is pushed down onto the document table 2 while the position is switched to the book mode B, the document is passed through the document table 2 into the document exposure slit hole l, which is the image reading section of the top plate 65 of the copying machine main body. Position facing each other.

The left side wall and the right side wall of the slit opening 16 are respectively inclined surfaces 12 that are downwardly inclined toward the back side of the document holding plate.
d-12e (Figures 2 and 5).

17Φ18 (uS1 fist 3 fist 5 figure) is a side plate formed by raising the upper surface of the original holding plate at the front end and back end of the slit opening 16, and 19 is a side plate formed by extending the front side plate 17 toward the front side. A handle for opening/closing (raising/folding) the original holding plate formed by
Reference numerals 20 and 21 designate bearing plates integrally attached to the inner sides of the side plates 17 and 18.

Reference numeral 22 denotes a paper discharge roller shaft rotatably supported by a bearing between the two bearing plates 20φ21, and 23 indicates a plurality of paper discharge rollers fixed at intervals along the length of the shaft 22, such as maltbren, etc. This is a friction roller made of elastic sponge. Each of these paper discharge rollers 23 is always in moderate contact with the inclined side wall surface 12e on the right side of the slit opening 16.

Reference numeral 24 denotes a thin sheet-like elastic member (for example, a polyethylene terephthalate sheet (trade name: Mylar)) as a sheet document peeling member, which is attached along the length of the inclined side wall surface 12e on the right side of the slit opening 16. The edge extends from the slit opening 16 to the back side of the document holding plate 12, and when the document holding plate 12 is pushed down onto the document table 2, it bends appropriately against the surface of the document table 2 against elasticity. state.

25-26 and 27 (FIG. 5113) are a position near the front end of the paper ejection roller shaft 22, a position near the back end,
The second and third arm members 28 (fifth 29 is a timing roller fixed to the front end of the paper discharge roller shaft 22, 29 is a sheet document feed roller shaft supported by a bearing between the tips of the second and third arm members 26 and 27, and 30 is a timing roller fixed to the front end of the paper discharge roller shaft 22. A plurality of sheet document feeding rollers are freely rotatably supported on the shaft 29 at intervals along the shaft length, and are located within the slit opening 16, and are placed on the document holding plate 12. 2, it comes into contact with a portion of the second surface of the document table that approximately corresponds to the position of the image reading section 1 of the main body of the image processing apparatus. 3
1 (FIG. 5) is a rotating shaft supported by a bearing at the tip of the first arm member 25, 32 is a drive roller fixed to the rotating shaft, and 33 is a one-way clutch 33a attached to the shaft 31.
A timing belt 34 is suspended between the timing roller 33 and the timing roller 28 fixed to the paper ejection roller shaft 22. The drive take-up roller 32 is connected to the document holding plate 1
2 onto the document table 2, the front edge member 3 of the document table 2
contact with the two sides of.

Reference numeral 35 denotes a cover plate that covers between the front side plate 17 and the back side plate 18, and is detachably attached to each upper bent edge of the front bearing plate 20 and the real bearing plate 21 with screws 36. Reference numeral 37 denotes a plurality of sheet document guide fin plates arranged side by side on the back side of the cover plate, 38, 38, and 39 are plate springs similarly attached and supported on the back side of the cover plate, and the plate springs 38, 38 are free. The end side is in contact with the L side of the sheet document feeding roller shaft 29. Further, the leaf spring 39 is in contact with the upper surface of the first arm member 25. When the document holding plate 12 is pushed down against the document table 2 by the pressing force of the leaf springs 38-38 and 39 mentioned above, the contact state of each sheet document feed roller 30 with the document table 2 surface and the drive control. Document table front edge member 3 of roller 32
The state of contact with the upper surface is stably and elastically maintained.

Reference numeral 40 denotes a sheet document introduction port, 41 a same discharge port, and 42 a sheet document introduction guide tray that is freely arranged on the surface of the document holding plate on the sheet document introduction port 40 side about a shaft 43; 44 allows the sheet to be held in an upright position by tilting it toward the document introduction port 40, and by folding the stand 44 toward the back side of the tray 42 around the shaft 44a, the sheet can be held on two sides of the document holding plate. (Fig. 2
Reference numeral 42a (shown by dotted lines in FIG. 7) is a sheet original side guide side wall formed upward along the rear side of the tray. 44b (FIG. 2) is a plurality of stand lower end holders formed on the upper surface of the original holding plate, each of which is a stopper protrusion, and by selecting a protrusion for receiving the lower end of the stand, the degree of inclination of the tray 42 can be adjusted. 44c is a piece that holds the tray 42 in the folded state with respect to the document holding plate 12;
The tray 42 is formed on the back side of the document holding plate 12.
When the tray 42 is folded down, it comes into elastic contact with the left end side wall surface of the document holding plate 12, and the tray 42 is held in the folded state by a frictional locking force.

45 (FIG. 3) is a rolling roller disposed on the back side of the document holding plate extension plate 12A, and when the document holding plate 12 is tilted down against the document table 2, the rolling roller 45 (FIG. 3) They contact each other to share and support the weight of the document presser plate 12.

(4) Sheet mode This is a case where a copy sheet document is automatically conveyed using the DF device A and is subjected to copy processing. The document presser plate 12 is locked to the main body of the copying machine and the sheet mode is switched in the manner described in item (2)-0 above. The document presser plate 12 is placed in a state where it is tilted over the document table 2. The sheet document introduction guide tray 42 is raised at an appropriate inclination angle with respect to the sheet document introduction port 40 of the DF device A.

A sheet original Os (Fig. 1-2) is placed on the inclined tray 42.
Place the document with the image side to be copied facing downward, and place the document on the tray with the back side of the document in contact with the inner surface of the guide side wall 42a formed along the back side of the tray 42. Slide the document down the slope and insert the leading edge of the document through the inlet 40 D.
The document is inserted into the F-loading WIA, and the leading edge of the document is brought into contact with the contact nip between the sheet document feed roller 30 and the document table 2 to be received.

Next, press the copy start button 46 (Figs. 1 and 5), and the on signal is input to the control circuit, causing the document table 2 to move forward in the first half a.
is started. In this case, since the document presser plate 12 is locked to the copying machine main body side, the document presser plate 12 does not move, and only the document table 2 moves forward (a). During the forward movement of the document table 2 in the first half, the sheet document feed roller 3 is in contact with the document table 2.
0 is for original platen 2! ! Although it rotates as a result of lIa,
The direction of rotation is opposite to the direction in which the document is pulled in, and the leading edge of the document Os is opposite to the direction in which the document is drawn in.
The document is maintained in a state where it abuts against the contact nip between the document table 2 and the document table 2 and is received. 1 of the front edge member 3 of the document table 2
- The drive loaf 32 that is in contact with the surface and the shaft 31 integrated therewith are also driven to rotate, but the direction of rotation is the idling direction of the one-way clutch 33a, and the drive loaf 32 that is in contact with the surface and the shaft 31 that is integral with it rotate in the direction of idle rotation of the one-way clutch 33a. No rotational force is transmitted to the timing roller 33, that is, the paper ejection roller 23
does not rotate.

Immediately after the document table 2 reaches the end point ila of forward movement, it begins to move backward. FIG. 6(a) shows the state at the time when the document table 2 reaches the forward movement end position W1a. At this point, the document leading edge reference mark M position (the fifth
) is positioned approximately corresponding to the longitudinal axis position of the image exposure slit hole l which is the image reading section of the main body of the copying machine.

When the original platen 2 is turned into a backward movement, the sheet original feeding roller 30 and the driving roller 32 are driven to rotate in the opposite direction to that in the above case. This allows the manuscript Os
is in a state where its leading edge is approximately aligned with the position of the document leading edge reference mark M on the document table 2, and the rear side of the document Os (tray 4
2) is the edge 2a of the document table extension plate 4 on the document table 2 side (Figs. 3 and 5).
is held between the feed roller 30 and the second surface of the document table 2, and is pressed against the second surface of the document table 2, and is moved together with the document table 2 at the same speed as the backward movement speed of the document table 2. The documents are drawn in and conveyed from the tray 42 side in the direction of the document table's backward movement, and pass through the image reading unit 1 position sequentially from the leading edge side.

That is, as described above, the document Os is conveyed through the image reading section l with its leading edge substantially matching the position of the document leading edge reference mark M on the right side of the document table, so that the paper feeding timing on the image processing apparatus B side, etc. The resist matches with
One-sided reference conveyance is performed using the side edge 2a as a reference.

Further, the rotation of the drive number reroller 32 is transmitted to the shaft 22 via the shaft 31 → one-way clutch 33a → timing roller 33 → timing belt 34 → timing roller 28, and the paper discharge roller 23 transfers the sheet document from the discharge port 41 to the DF device A. The original plate 2 is rotated in the direction of ejecting the document to the outside at a circumferential speed that is approximately the same as the backward movement speed of the document table 2.

When the leading edge of the document os passes through the image reading section 1 position, it is scooped up from the surface of the document table 2 by the peeling member 24 that is in contact with the surface of the document table 2 and deflected toward the ejection port 41, and on the way, it is caught by the sheet ejection roller 23. Due to the paper ejection force due to rotation, the ejection port 4
1 to the outside of the DF device A, the conveyance of the document O3 progresses as the document table 2 continues to move backward.

FIG. 6(b) shows a state in which the document table 2 is in the middle of backward movement and rotation.

By the time the document table 2 reaches the backward movement end position 1b, the rear end of the document O8 has finished passing the image reading section 1 position, and the document O8 has passed through the document holding plate 12 on the side of the document discharge port 41 from the document discharge port 41. The top surface of the paper is used as a tray and the paper is completely ejected in the seventh position. Figure 6 (C
) is a diagram showing the state at the time when the document table 2 reaches the backward movement end position 21b.

The document table 2 that has reached the backward movement end point Wb is immediately changed to the second half forward movement a, returns to the initial home position, and enters a standby state.

In this way, the sheet original O8 is automatically conveyed to the image reading section 1 position at the same speed as the backward movement speed of the document table 2 in conjunction with the backward movement of the document table 2, and the sheet document O8 is automatically conveyed to the image reading section 1 position at the same speed as the backward movement speed of the document table 2. During the position passing process, the original image is read (in this example, slit imaging exposure of the original image on the surface of the photosensitive drum 51) is performed sequentially from the leading edge of the image to the trailing edge, and copying machine B creates a copy of the original image. It will be done. Further, the original document Os that has been read is automatically discharged to the outside of the DF device A.

(5) Book mode copying This is the case when copying a thick original such as a book. Said (
2) Set the document presser plate 12 to the book mode state in which it is locked to the document table 2 side in the manner described in section-0. Since the sheet document introduction guide tray 42 is not used, it is brought down and locked onto the -L surface of the document holding plate 12 as shown by the two-dot chain line in FIG. 2 and in FIG.

The document holding plate 12 is opened and raised upward from the document table 2 around the shaft 13, and a thick document On (FIG. 7) to be copied is placed on the document table 2 with the image side facing forward. In this case, B;
(Place the document OB with the rear side aligned with the edge 2a (Fig. 5) on the document table 2 side of the document table extension plate 4 (Fig. 5), and the leading edge aligned with the position of the document leading edge reference mark M. .That t-fold manuscript OB
Place the document presser plate 12 over the top of the document. Original holding plate 12
is connected to the slide plate 9 by passing the shaft 13 through an elongated hole 13a in the vertical direction as shown in FIG.

After setting the original OB as described above, press the copy start button 46.The ON signal is input to the control circuit, and the original table 2 moves from forward movement a to backward movement in the first half of the document table 2, as in the sheet mode copying described above. The second half of the forward movement a is performed. However, this movement of the document table 2 is performed with the set document Os and the document presser plate 12 placed thereon. FIG. 7 shows the state when the document table 2 reaches the forward movement end position a'.

In this state, the leading edge of the original OB is located at the image reading section 1 position. Then, the document table 2 moves back, and in the process of reaching the end point of the backward movement, the document OB passes through the image reading unit 1 position sequentially from the leading edge to the trailing edge, and the image is read. The copy is made by B.

The document table 2 that has reached the backward movement end position b' immediately starts the second half forward movement a.
The machine then returns to its initial home position and enters a standby state. Open and raise the document presser plate 12 from above the document table 2 and place the document o.
Take out B.

When copying multiple copies of the same original (multi-copy), set the required number of copies in advance using the numeric keypad 47 (Figs. 1 and 5) and then press the copy start button 46. This process is executed continuously a set number of times, and the set number of copies are output from the copy mB.

If it is desired to obtain a plurality of copies of the same sheet document Os, copy processing may be performed using this book mode copying method.

(ff) When the inspection and maintenance knob 14a of the D F device A is set to the neutral switching position N, the wSl of the frame 14 and the second locking pieces 14b and 14c are secured to both the immovable member 66 side and the document table 2 side. Not in a relationship,
Slide plate 9. That is, the original holding plate 12 with the DF 11t mounted thereon can be freely slid in the left and right directions along the rails 7 and 8 with respect to the original table 2 or the main body of the copying machine, and the sliding plate 9 is By moving the slide plate 9 to the left or right until it is removed from the rail strips 7 and 8, the document holding plate 12 with the DF device A attached can be removed from the copying machine main body and the document table 2. . So D
F device! Inspection and maintenance of the tA can be easily carried out by the above-mentioned removal. In addition, simple inspection etc. can be carried out by removing the cover plate 35 which is secured with screws 36, 36.

(7) Additional explanation of sheet document peeling member 24 (ffi8~
(Fig. 11) The tangent line 24a of the lower edge of the sheet original peeling member 24 to the surface of the document table 2 is in the direction C-, which is perpendicular to the reciprocating force direction aeb of the document table.
In case C, the edge of the leading edge of the sheet document O3 hits the edge of the leading edge of the member 24 with its entire width at once, causing a shock to the original, damaging the edge of the original, or causing the original to shift. There are also cases where this is possible. Therefore, in this example, as shown in FIG. 8, the tangent line 24a between the lower edge of the member 24 and the surface of the document table 2 is set at an angle θ with the direction C-C perpendicular to the document table reciprocating direction aeb. It is. In other words, manuscript O5
The angle θ is set so that the member 24 smoothly abuts and the original is scooped up. In particular, a larger angle θ is provided at the corner portion 24b that is the first to collide.

In this way, by attaching the member 24 at an angle to the edge line of the original so that the original and the member 24 do not collide with each other across the entire width at once, the original is always smoothly scooped off the surface of the original table 2.

Further, the sheet original peeling member 24 has a shape 7 in which its lower edge always protrudes from the slit opening 16 toward the back side of the original holding plate 12.
．． 1 (functioning state), there is a possibility that hands or other objects may inadvertently collide with or get caught on the protruding lower edge, causing damage to the protruding lower edge. It is preferable to keep it in a retracted inward storage-like island of 16).

FIGS. 9 to 11 respectively show examples of such configurations. The example in Figure 9 shows the bearing plates 20 and 20 on the front and rear sides of the DF equipment line.
A rotation shaft 70 is supported by a bearing between 21 and the sheet original peeling member 24 is mounted and held on the shaft 70, and a shaft rotation operation handle 71 is provided at the front or back end of the shaft 70. When the handle 71 is placed in the upright state shown by the solid line, the upright state of the handle is held by a click stopper (not shown), and the lower edge of the member 24 is held in a functional state protruding from the slit opening 16. When the handle 71 is tilted and rotated approximately 45 degrees clockwise around the shaft 70, it is held in that position by a click stopper (not shown), and the member 24 is accordingly lifted and rotated as shown by the two-dot chain line. It is switched and maintained in the stored state retracted inside the slit opening 16.

In the example shown in FIG. 10, when the original holding plate 12 is tilted against the original table 2, the shaft 70 comes into contact with the upper surface of the front edge 3 of the original table 2 or the upper surface of the extension plate 4 of the original table 2. A lever 72 is fixed, and the lever 72 is always urged to rotate clockwise about a shaft 70 by a spring (not shown). When the document holding plate 12 is opened and raised from the document table 2, the lever 72 is
The cover spring rotates the member 24 clockwise as shown by the two-dot chain line, and the member 24 is rotated and held in the retracted state shown by the two-dot chain line.

When the original holding plate 12 is pushed down onto the original table 2, the lever 7
2 is received by contacting the upper surface of the front edge member 3 of the document table 2 or the upper surface of the extension plate section 4, and the lower end of the document holding plate 12
When the member 2 is pushed down, the shaft 70 rotates counterclockwise and the member 2
The lower end of the document plate 4 is automatically switched to a functional state in which it is in contact with the surface of the document table 2, as shown by the solid line.

The example in FIG. 11 is provided with an electric switch 73 that is turned on when the document holding plate 12 is tilted against the document table 2 and turned off when it is opened and raised, and the shaft 70 is connected to the link 74a by an electromagnetic solenoid plunger 74 in response to the on signal. By turning the member 24 counterclockwise via the lever 74b, the member 24 is held in the functional state shown by the solid line, and by turning it clockwise in response to the off signal, it is switched to the stored state shown by the two-dot chain line. It is something.

(8) Other configuration examples of the DF mounting device line (Figs. 12 to 14) The DF mounting device line of this example has a sheet document feeding roller 30 that also serves as a drive take-up roller and is also provided with a sheet document introduction roller 75. , members common to those in the examples in FIGS. 1 to 5 are given the same reference numerals, and repeated explanations will be omitted.

The shaft 29 of the sheet document feed roller 30, the shaft 22 of the paper discharge roller 23. The shaft 76 of the sheet document introduction roller 75 is supported by a bearing between the front bearing plate 20 and the rear bearing plate 21 so as to freely rotate in parallel.

The feed roller 30, the paper discharge roller 23, and the introduction roller 75 are fixedly attached to the respective shafts 29, 22, 76,
The paper discharge roller 23 and the introduction roller 75 are always in moderate contact with the inclined side wall surfaces 12d to 12e on the right side and the left side of the slit opening 16, respectively. When the document pressing plate 12 is placed over the document table 2, E, the lower surface of the feed roller 30 is in contact with the document table 2.

Reference numerals 77 and 78 denote a first gear and a first timing roller 79-80, which are respectively attached to the front end of the sheet document feeding roller shaft 29 via one-way clutches 77a and 78a.
81-82 are respectively supported by the front bearing plate 20 to freely rotate around the pin shafts 81a◆82a. In addition, there are a pair of fluid gears that mesh with each other, one of which, fluid gear 81, meshes with the first gear 77, and the other fluid gear 82 meshes with the second gear 79, respectively. A timing belt 83 is suspended between the first and second timing rollers 78080.

84 is a third timing roller attached to the back end of the sheet original feed roller shaft 29 via a one-way clutch 84a; 85 is a fourth timing roller fixed to the back end of the sheet original introduction roller shaft 76; 86; are the third and fourth
This is a timing belt suspended between timing rollers 84 and 85.

As described above, when the document holding plate 12 is laid down on the document table 2, the lower surface of the sheet document feeding roller 30 comes into contact with the document table 2, and the sheet document feeding roller 30 is in contact with the document table 2 during forward movement a and backward movement of the document table 2. It rotates as a result of the rotation. Here, the roller 30 and the shaft 2 integrated with the roller accompanying the forward movement a of the document table 2
When the rotation direction X of 9 is forward rotation, and the rotation direction Y associated with backward movement is reverse rotation, each of the one-way clutches 77a and 84 of the first gear 77 and the third timing roller 84
A is engaged with the gear 77 and roller 84 only when the lever 29 rotates in reverse Y, that is, when the document table 2 is moving backward, causing the gear and roller to rotate Y in reverse together with the shaft 29. On the other hand, the first
Contrary to the above, the one-way clutch 78a of the timing roller 78 causes the shaft 29 to rotate forward X, that is, the document table 2 is driven forward a
It engages the roller 77 only when the roller is
Rotate it forward X together with 9.

Therefore, when the document table 2 is moving forward a, the sheet document introduction roller 75 is held in a stopped state because the rotational force of the shaft 29 in the normal rotation direction X is not transmitted to the third timing roller 84. , when the document table 2 is moving backward, the rotational force of the shaft 29 in the reverse direction Y is applied to the one-way clutch 84.
a4 Third timing roller 84 → timing belt 86
→It is transmitted to the shaft 76 via the fourth timing roller 85, the shaft 76 rotates in the same Y direction as the shaft 29, and the sheet document introducing roller 75 rotates in the document drawing direction. Note that the diameters of the timing rollers 84 and 85 are set so that the circumferential rotational speed of the roller 75 substantially matches the backward movement speed of the document table 2.

On the other hand, when the document table 2 is moving forward a, the rotational force of the shaft 29 in the normal rotation direction X is not transmitted to the first timing roller 78, but the output roller 23 is The rotational force of the idle dryer 81Φ82 is transmitted from the second gear 79 to the discharge roller shaft 22, and
rotates in the Y direction opposite to the shaft 29, and the roller 23 rotates in the document ejection direction. Further, when the document table 2 is moving backward, the rotational force of the shaft 29 in the reverse direction Y is not transmitted to the first gear 77, contrary to the above, but is transmitted to the first timing roller 78. Therefore, the rotational force is transmitted from the timing belt 83 to the second timing roller 80 to the discharge roller 22, and the shaft 22 rotates in the same Y direction as the shaft 29, and the roller 23 rotates in the document discharge direction. That is, the discharge roller 23 is rotated in the document discharge direction in conjunction with both the forward movement a and the backward movement of the document table 2. The gear ratio of the power transmission system and the like are set so that the rotational circumferential speed of the discharge roller 23 substantially matches the moving speed of the document table 2.

FIGS. 14(a) to 14(e) are diagrams of the document feeding process during sheet mode copying by the DF device A of this example. Note that in this figure, the DF? Only the sheet document introduction roller 75, the sheet feeding roller 30, the paper ejection roller 23, and the peeling member 24 of the device A are shown.

Q) (a) The figure shows the standby state, and the L side part of the original holding plate 12 on the left side of the DF device A part is used as a sheet original loading tray, and the sheet original O5 is placed on it with the image side facing downward. The original Os is placed in a state where the leading edge of the original is abutted against the mutual contact nip between the original introducing roller 75 and the inclined side wall surface 12d of the slit opening 16. Of course, as shown in the examples in Figures 1 to 5, a dedicated document introduction guide tray 42 is provided, and the document O
It is also possible to perform the above set of 5.

■ Next, when the copy start button is pressed, the document table 2 moves forward in the first half a and reaches the end point of the forward movement! ! reach a. (b) The figure shows the state at this point. During the forward movement of the document table 2 in the first half, the document feed roller 30 and the paper ejection roller 23 rotate in the X direction and the Y direction, respectively, in conjunction with the movement of the document table 2. However, the document introducing roller 75 does not rotate and is kept in a stopped state (FIG. (a)). Therefore, the set document O3 is not fed and the initial set state is maintained as it is.

Also, when the document table 2 reaches the forward movement end position 1a, the document leading edge reference mark M position on the right side of the document table 2 is located at the document feed roller 3.
It is located to the left of the contact portion between 0 and the second surface of the document table by a distance line. This distance # statement is based on the leading edge position of the original Os whose receiver is stopped at the contact nip between the original introducing roller 75 and the inclined side wall surface 12d of the slit opening 1':+16, the original feeding roller 30 and the original platen. It is approximately equal to the length of the document conveyance path up to the contact point with the second surface.

(2) The document table 2 which has reached the forward movement end position a immediately starts to move backward. Along with this backward movement of the document table 2, all rollers including the document introducing roller 7511, the feeding roller 30, and the document ejecting roller 23 are rotated in the Y direction, and the document Os is rotated by the rotational force of the document introducing roller 75. is automatically drawn into the DF loading device. When the leading edge of the drawn original Os reaches the contact area between the original feeding roller 30 and the original table 2, the position of the original leading edge reference mark M on the original table 2 (C) shows the state at this point when the contact point position is exactly reached and the registration with the sheet feeding timing on the image processing device B side is matched.

As the document table 2 continues to move backward, the document Os is held between the feed roller 30 and the document table 2 and is pressed against the surface of the document table 2 at the same speed as the backward movement speed of the document table 2. The document is conveyed together with the document table 2 and sequentially passes through the 1-image reading unit 1 position from the leading edge side. When the leading edge side of the original Os passes through the image reading unit 1 position, it is scooped from the original table surface by the peeling member 24 that is in contact with the document table 2 surface and deflected in the ejection direction 041, and is deflected in the ejection direction 041 on the way. The paper receives a discharge force by the rotation of 23, and is ejected to the outside of the DF device A.

■ The leading edge of the document O5 has been removed from the contact area between the document feeding roller 30 and the document table 2 and has passed the image reading unit 1 position before the document table 2 reaches the end point of the backward movement. If the original Os is small in size, it is completely ejected out of the DF device A. When the original Os is large in size, when the original table 2 reaches the backward movement end point 1b, the rear end is still not completely removed from the ejection port 41, as shown in FIG. Indicates the condition.

However, even in such a state, the paper ejection roller 23 continues to move in the &Y direction, as described above, until the document table 2 continues to shift to the backward movement a and returns to the initial home position. Since it rotates in the document discharge direction, even the large-sized document Os is completely sent out to the outside of the DFF position 71A. The figure (e) shows the state in the middle of the second half forward movement a of the document table 2.

The case of book mode copying is the same as the case of the example shown in FIG. 7 described above.

(9) In addition, the document feeding roller 30 may be an S-end belt member that contacts the surface of the document table 2 and rotates as a result.

The DF device A of the embodiment has a document holding plate 12 that can be opened and closed with respect to the document table 2 incorporated therein as a tilting member. The DF unit a2A can be independently raised and lowered with respect to the document table 2.

The image processing device B is not limited to the copying machine of the embodiment, but may be an image reading device using a solid-state image sensor array such as a CCD array as an image reading device, a facsimile device, or the like.

C. Effects of the Invention The sheet document feeding device iA of the present invention includes at least a sheet document inlet 40 and a sheet document discharge port 41, and a tilting member 12 with respect to the document table surface, and is assembled to the member. Consisting of a sheet original feeding member that rotates or rotates as the original table moves, and a sheet original peeling member 24, it does not require a dedicated power source, synchronization mechanism, or sensors, and is highly reliable. It is a good and extremely simple sheet document feeding device.
This device is suitable for use in the personal type image processing device mentioned above.

Further, as explained in section (7), the sheet original peeling member 24 comes into contact with the original platen surface and removes the sheet original material t.
The DF has a movable configuration that allows it to be pulled into the inside of the device and converted to a storage state where it does not touch the document table surface.
When the device is opened from the document table, it is preferable to keep it in the stored state, that is, the sheet document peeling member 24
If the device is installed in a fixed position that is always in a functional state, even when the device is opened and raised from the document table, the tip side of the sheet document peeling member will protrude outward, and it is impossible to accidentally touch the protruding portion. There is a possibility that the member may be damaged by colliding with or being caught by other objects, but this can be prevented by doing the above. The functional state/storage state of the sheet manuscript material + mfII material is changed in conjunction with the raising and lowering of the device with respect to the document table, and when the device is tilted down with respect to the document table, the functional state is changed and maintained. It is convenient to do so.

[Brief explanation of the drawing]

1 is a partially cutaway external perspective view of an embodiment of the DF device according to the present invention, FIG. 2 is a longitudinal sectional front view including an image processing device, FIG. 3 is a longitudinal sectional view of the DF device portion, and FIG. The figure is an enlarged sectional view of the mode switching frame, Figure 5 is a plan view of the DF device with the cover plate removed, and Figures 6 (a) to (C) are document feeding during sheet mode copying. Process diagram, 7th
The figure shows the state when the document table reaches the forward movement end position in book mode copying, FIG. 8 is a plan view of the sheet document peeling member, and FIGS. 9 to 11 respectively show the sheet document peeling member. Example of mechanism for selectively switching between functional state and storage state, 1st
2 is a plan view of the essential parts of another embodiment of the DF device, FIG. 13 is a side view thereof, and FIGS. 14(a) to 14(e) are sheet document feeding process diagrams. A is a DF device, B is an image processing device, l is an image reading unit,
2 is a reciprocating document table, 30 is a sheet document feeding roller, 2
3 is the paper ejection roller, 75 is the introduction roller, and 24 is a sheet document peeling member. Prisoner No. 2 O Figure S ノ+l] Part ■

Claims (3)

[Claims] (1) The document table is latched to the movable image processing device main body, and can be freely raised and tilted with respect to the document table surface, and in the tilted state, the document table is positioned facing at least the image reading section of the image processing device main body. The tilting member includes a sheet document feeding member that contacts the manuscript table surface when the raising member is tilted relative to the document table surface and rotates or rotates as the document table moves; and the document table surfaces that are in contact with each other. A document introduction port that introduces a sheet document between the sheet document feeding member and a tilting member that contacts the document table surface in a tilted state relative to the document table surface, and an image is formed by the cooperation of the moving document table and the sheet document feeding member A sheet document feeding device comprising: a sheet document separation member that separates a sheet document that has passed through a reading section from a document table surface; and an ejection port for the sheet document peeled from the document table surface. (2) The sheet document feeding device according to claim (1), wherein the sheet document peeling member is a movable member that can be switched between a functional state in which it makes contact with the document table surface and a stored state in which it does not make contact with the document table surface. (3) The sheet document feeder according to claim (2), wherein the sheet document peeling member is switched to a functional state in conjunction with this when the tilting member is tilted down with respect to the document table surface. sending device.