JPS6136736A - Sheet original feeding device - Google Patents

Abstract

PURPOSE:To constitute a reliable and simple DF device with a simple structure by providing an original feeding member which performs the feeding operation in accordance with movement of an original platen and interposing an elastic member between an original retaining plate and the original platen to relax the shock when the original retaining plate is brought down on the original platen. CONSTITUTION:An original feeding device A is brought down on an original platen 2 to insert an original, and the original is led in automatically in accordance with movement of the original platen and is read and is subjected to image processing. A driving read roll 32 and a spring 39 provided in the side opposite to a pivot 13 of an original retaining plate 12 are brought elastically into contact with the original platen to relax the shock when the retaining plate 12 is brought down on the original platen 2. Thus, the reliabile and simple DF device is constituted with the inexpensive simple structure.

Description

Detailed Description of the Invention B. Purpose of the Invention [Field of Industrial Application] The present invention is a device (document (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 format mechanisms are in use, such as those equipped with an automatic re-feeding mechanism for reversing documents.

On the other hand, when it comes to image processing devices such as copying machines, high-grade high-speed acid is a portable, compact, lightweight, and low-priced light model called a personal type, compared to 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 general-purpose image processing devices, and as such are quite complex, high-grade, and expensive devices, and are too expensive for use in light-duty models. Function, high class φ is too expensive and inappropriate.

Therefore, we have developed and disseminated a simple and inexpensive F device that has a simple mechanical configuration, is highly reliable, and is easy to handle, suitable for use in light image processing devices such as personal types. is strongly desired.

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.

1. Configuration of the Invention [Means for Solving Problems] That is, the present invention has a structure in which a tilting member that is fixed to a main body of an image processing apparatus having a movable document table and that can be freely raised and tilted with respect to the surface of the document table is provided. a sheet document feeding member that performs a sheet feeding operation in conjunction with the movement of the document table when the tilting member is in a tilted state with respect to the document table surface;
The object of the present invention is to provide a sheet document feeding device characterized by comprising a member that elastically abuts against the document table when the tilting member is tilted against the document table.

[Effect]

The DF device of the present invention has good operability and ease of handling because it can be opened and closed with respect to the document table as described above.

In addition, when the document table is tilted down, the presence of a member that elastically contacts the document table, which is provided on the opposite side of the tilting shaft, alleviates the tendency to tilt the document table, and the DF device・
The document table and image processing device are protected.

〔Example〕

Fig. 1 is a partially cutaway external perspective 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 is FIG. 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 52→original illuminating device 53
and document image exposure (slit exposure) by a short focus lens array (trade name SELFOC) 54 → toner development of the electrostatic latent image formed on the drum surface by a developing device 55 → transfer charging device 56 of the toner developed image The process of transferring the toner image onto the transfer material → fixing the image on the transfer material by the fixing device 59 is executed, and the copy is delivered to the discharge port 63.
from there 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; and 60 is a device that is installed in 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. .

Reference numeral 65 denotes a top plate of the device 50 outside the copying machine, l is a document exposure slit hole as an image reading section formed approximately in the center of the top plate in the width direction of the top plate, and the photosensitive drum 51 is located below the slit hole l. The longitudinal axis of the slit hole l and the generatrix of the photosensitive drum 51 are parallel to each other. Further, the short focus lens array 54 has three and three holes 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 copying machine exterior case 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, an edge member 3 and a relatively wide extension plate portion 4 are provided at the front edge and rear edge of the document table 2, respectively, and the edge member 3 and the extension plate portion 4 are connected to the top plate 65-.
L, is supported and disposed via left and right guide rails 5 and 6.

The above-mentioned document table 2 is normally set at the home position at the solid line claw position in Figs. 1 and 2, which is within the surface area of the top plate 65 of the outer casing of the copying machine. Every time a copy start signal is issued, a reciprocating drive mechanism (not shown) such as a pinion-rack mechanism or a cable mechanism operates to move the L-face plate 65-L toward the right in FIG. It is moved forward a until it reaches the end point position a, and then immediately moved backward in the opposite direction to the left. This backward movement of the document table continues until the document table passes through the initial home position and reaches the end point of the backward movement indicated by the chain three-dot line. Immediately after reaching the end point of the backward movement (the first position), the forward movement a is resumed and returned to the initial home position, completing one reciprocating movement cycle and entering the standby state. For convenience, the forward movement from the home position to the forward movement end point position a and the forward movement from the backward movement end point position 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.

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; 8 refers to a stationary member 66 integral with the exterior casing of the copying machine on the opposite side of the extension plate portion 4. A rail strip 9 formed in the direction of movement of the document table, and therefore parallel to the above-mentioned rail strip 7, is engaged with both the above-mentioned rail strips 7 and 8 via engagement rail strips 10 and 11, respectively. , a slide plate 12 that can be freely slid along the rails 7 and 8, and a slide plate 12 that can be freely raised and tilted relative to the document table 2 about a shaft 13 via an extension plate 12A on the document table 2 of the slide plate 9. A document holding plate connected to a hard exterior plate 12a, a relatively thick hard material layer 12b such as a synthetic resin sponge pasted on its front surface, and a white sheet such as EVAL sheet pasted on its bottom surface. 12c, and has a size that can sufficiently cover the entire upper surface area of the document table 2.

(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 the side of a fixed member 66 that is integrated with the exterior casing of the copying machine. This is a mode switching top that can be selectively switched to three states: a book mode switching state in which it is locked in two biases, and a neutral state in which it is not locked in either the immovable member 66 side or the document table 2 side.

The mode switching piece 14 is located approximately in the longitudinal center of the slide plate 9, and the finger hook has a knob 14a that protrudes from the upper surface of the slide plate, and first and second locking pieces 14b are integral with the lower end of the knob 14a. 14c to the engagement rail 10- 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 sliding 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 12.
The knob position when moved to the hole end position on the opposite 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 two is the neutral position N.
It is.

When the knob 14a is located at the neutral position N, the first and second locking pieces 14b, 1 of the mode switching piece 14
4c is not engaged with either the stationary member 66 side or the original platen 2 side, and the slide plate 9 (i.e., original holding plate 12) is attached to the original platen 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 7-8, 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 4a is slid to the seat mode switching position S in the state where the positions are aligned (Figs. 1 and 2), as shown in Fig. 3 and 4, the first The tip of the locking piece 14b passes through the hole 11a formed on the side surface of the retaining rail strip 11 and is fitted into the notch 8a formed on the side of the rail strip 8 on the stationary member 66 side. As a result, the slide plate 9, that is, the document holding plate 12 is moved to the stationary member 66.
When the document platen 2 is moved and driven, the document holding plate 12 does not move, and only the document platen 2 moves. It will be driven.

■ Switch knob 14a to book mode! When the frame 14 is slid to position lB, the tip of the second locking piece 14C of the frame 14 passes through the hole 10a formed on the side surface of the retaining rail 10, and then passes through the hole 10a formed on the side surface of the rail strip 7 on the side of the extension plate section 4 of the document table. It is in a state where it is fitted into the cutout portion 7a. As a result, the slide plate 9, that is, the document holding plate 12, is in a state where it is integrally locked with the document table 2 side (book mode switching state S), and when the document table 2 is moved and driven, the document holding plate 12 is also fixed to the document table and will move together.

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

Reference numeral 16 denotes a slit opening formed in the width direction of the wire plate approximately at the center of the document holding plate 12, and this slit opening aligns the document holding plate 12 with respect to the document table 2 which is in a standby position at the home position. Then, when the original holding plate 12 is pushed down onto the original table 2 with the knob 14a switched to the sheet mode S or book mode B position, the image on the top plate 65 of the copying machine main body is read through the original table 2. It is located facing the original exposure sleeve 7 hole l.

The left side wall and the right side wall of the slit opening II 16 are respectively inclined surfaces 12d-12e (FIG. 2, W45) that are downwardly inclined toward the back side of the document holding plate.

17-18 (Figs. 1, 3, and 5) are side plates formed by raising the upper surface of the document holding plate at the front end and back end of the slit opening 16, and 19 is a side plate formed by raising the upper surface of the original holding plate. A handle for opening/closing (raising/lowering) the document holding plate formed by extending and protruding, 2
0.21 is a bearing plate integrally attached to the inside of the above-mentioned side plates 17φ18.

Reference numeral 22 designates a paper discharge roller shaft rotatably supported between the two bearing plates 20 and 21, and 23 indicates a plurality of paper discharge rollers fixed at intervals along the length of the shaft 22. For example, This is a friction roller made of elastic sponge such as maltbren. 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.

24 was attached to the inclined side wall surface 12e on the right side of the slit opening 16 along its length. A thin sheet-like elastic member (for example, a polyethylene terephthalate sheet (trade name: Mylar)) is used as a sheet document peeling member, and its lower edge extends from the slit opening 16 to the back side of the document presser plate 12, and the lower edge of the thin sheet-like elastic member (for example, polyethylene terephthalate sheet (trade name: Mylar)) When the presser plate 12 is pushed down onto the document table 2, it bends appropriately against the surface of the document table 2 against elasticity and comes into contact with the surface of the document table 2.

25, 26, and 27 (Figs. 5 and 3) are the above paper ejection roller shafts 2.
2, a position closer to the rear end of the shaft 22, and a position closer to the front end of the shaft 22 than the longitudinal center of the shaft 22. let me,
The first, second and third arm members 28 (FIG. 5) are timing rollers fixed to the front end of the paper ejection roller shaft 22, and 29 are the second and third arm members 2B- A sheet document feeding roller shaft 27 is supported by a bearing between the tip ends of the sheet document feeding roller shaft 27, and a plurality of sheet document feeding rollers 30 are supported on the shaft 29 at intervals along the shaft length so that they can rotate freely. , is located in the slit opening 16, and when the document holding plate 12 is pushed down onto the document table z, 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 rotating shaft.
A timing roller 34 is mounted and supported through a timing roller 34, and a timing belt 34 is a timing belt t 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 the top surface of the

35 is a cover plate that covers between the front side plate 17 and the back side plate 18, and is detachably attached to each -L side bent edge of the front bearing plate 20 and real bearing plate 21 with screws 36φ36. 37
38, 38, and 39 are plate springs that are also attached and supported on the back side of the cover plate, and plate springs 38-38 are attached to the back side of the cover plate.
The free end side of is in contact with the upper side of the sheet original 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 presser plate 12 is pushed down against the document table 2 by the pressing force of the leaf springs 38-38-39 mentioned above, the contact state of each sheet document feeding roller 30 with the document table 2 surface and the drive control. The state of contact of the roller 32 with the upper surface of the front edge member 3 of the document platen is stably and elastically maintained.

In this embodiment, the drive number reroller 32 described above is provided at a position opposite to the tilting shaft 13 side of the document presser plate 12, which is a tilting member, and is used to tilt the document presser plate 12 onto the document table 2. It also serves as a member that elastically contacts the document table 2 (in this example, the document table front edge member 3), and due to the cushioning action of the spring 39, the document holding plate 12 in which the DF device A is incorporated is moved to the document table 2 surface. The shock when falling down is alleviated. Of course, a dedicated shock-reducing member separate from the drive-reducing roller 32 may be provided.

40 is a sheet document introduction port, 41 is a same discharge port, and 42 is a sheet document introduction guide tray that is arranged freely up and down about a shaft 43 on the upper surface of the document holding plate on the side of the sheet document introduction port 40;
The stand 44 can hold the sheet 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, it can be folded down onto the top surface of the document holding plate. 42a is a sheet document side guide side wall formed upward along the back side of the tray. A4B (Fig. 2) shows that the plurality of stand lower end holders formed on the upper surface of the document holding plate are stopper protrusions, and by selecting the protrusion to receive the lower end of the stand, the tray 42
The degree of inclination can be adjusted. Reference numeral 44c is a piece for holding the tray 42 in the folded position relative to the original holding plate 12, which is formed on the back side of the tray 42, and when the tray 42 is pushed down onto the original holding plate 12, an elastic member is attached to the left end wall surface of the original holding plate 12. The tray 42 is kept in the depressed state by the 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 original is automatically conveyed using the DF device iA 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. Place the document holding plate 12 on the document table 2.
Place it in a state where it is folded over. 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 against the inner surface of the guide side 1142a formed along the back side of the tray 42. Slide the leading edge of the original down the inclined surface and insert it into the DF device tA through the inlet 40, and then push the leading edge of the original into the contact nip between the document feed roller 30 and the document table 2 and receive it. leave it in that state.

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 rotates as a result of the forward movement a of the document table 2, but the direction of rotation is opposite to the drawing direction of the sheet document, and the leading edge of the document Os is connected to the sheet document feeding roller 30 and the document table 2.
The drive roller 32 that is in contact with the upper surface of the front edge member 3 of the stacking platform 2 and the shaft 31 integrated therewith are also driven to rotate. However, the direction of rotation is one-way clutch 3
3a, and the rotational force is not transmitted to the timing roller 33 attached to the shaft 31 via the one-way clutch 33a, that is, the paper ejection roller 23 does not rotate.

Immediately after the document table 2 reaches the forward movement end position a', it starts to move backward. FIG. 6(a) shows the state when the document table 2 reaches the forward movement end position a, and at this point, the document leading edge reference mark M position on the right side of the document table 2 (FIG. 5) is positioned approximately corresponding to the longitudinal axis 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 drive taking 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).
The document is held between the feeding roller 3o and the second surface of the document table 2, and is pressed against the second surface of the document table 2, and moves along with the document table 2 at the same speed as the return movement speed of the document table 2. The documents are pulled in and conveyed from the tray 42 side in the backward movement direction of the document table, and pass through the image reading unit 1 position sequentially from the leading edge side.

That is, as described above, the document O5 is conveyed through the image reading unit 1 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 device B side, etc. One side reference transport is performed using the edge 2a on the document table 2 side as a reference.

Further, the rotation of the driving roller 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. It 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 O3 passes through the image reading unit 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 is deflected toward the ejection port 41. Due to the paper ejection force due to rotation, the ejection port 4
1 to the outside of the DF device 1A, the above-mentioned conveyance of the original Os progresses as the original 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, the rear end of the document O5 has passed the image reading unit 1 position, and the document holding plate 12 on the side of the document O5 from the paper discharge port 41 has finished passing through the image reading unit 1 position. The paper is completely ejected onto the top surface of the tray. Figure 6 (C
) is a diagram showing the state at the time when the document table 2 reaches the backward movement end position.

When the document table 2 reaches the end position of the backward movement, it immediately changes to the second half of the forward movement a, returns to the initial home position, and enters a standby state.

In this way, the sheet original Os is automatically conveyed to the image reading unit 1 position at the same speed as the backward movement speed of the original platen 2 in conjunction with the backward movement of the original platen 2, and the image reading unit 1 of the original Os is automatically conveyed to the image reading unit 1 position. 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) Bookmote Copy This is a case where yl and L originals such as books are to be copied. Press the document holding plate 12 in the manner described in (2)-(2) above.
into the book mode state where it is locked on the document table 2 side. Since the sheet document introduction guide tray 42 is not used, it is brought down and locked onto the upper surface of the document holding plate 12 as shown by the two-dot chain line in FIG. 2 and in FIG. 7.

The document holding plate 12 is opened and raised upward from the document table 2 around the shaft 13, and a thick document OB to be copied (FIG. 7) is placed on the document table 2 with the image surface facing downward. In this case, the rear side of the original OB is aligned with the edge 2a (Fig. 5) on the original platen 2 side of the original platen extension plate 4, and the leading edge is aligned with the position of the original leading edge reference mark M. place The document pressing plate 12 is placed over the placed document OB. The document holding plate 12 is connected to the slide plate 9 by passing a shaft 13 through a vertically elongated hole 13a as shown in the fourth figure so that it can be placed almost horizontally even if it is placed over a somewhat thick document OB. be.

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, the document table 2 is moved with the set document OB 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 the end point of the back movement is b.
In the process from the front end to the rear end, the original OB sequentially passes through the positions of the image reading section 1 from the leading end to the trailing end, and the image is read, and a copy is made by the copying machine B.

When the document table 2 reaches the end point of the backward movement, it immediately changes to the second half of the forward movement a, returns to the initial home position, and enters a standby state. Open and raise the document holding plate 12 from above the document table 2 to hold the document OB.
Take out.

In the case of multiple copying 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 to start the reciprocating movement drive a*b of the original platen 2. *a is executed continuously for the set number of copies, and the copy machine B outputs the set number of copies.

If it is desired to obtain multiple copies of the same document for the sheet document O5, copy processing may be performed using this book mode copying method.

(8) When the inspection and maintenance knob 14a of the DF device A is set to the neutral switching position N, the first and second locking pieces 14b-14c of the top 14 engage with both the stationary member 66 side and the document table 2 side. Not related, the slide plate 9, that is, the document holding plate 12 to which the DF device A is attached.
can be independently slid in the left and right directions with respect to the document table 2 or the copying machine main body along the rail strips 7 and 8, and the slide plates 9 will continue to move until the slide plates 9 are removed from the rail strips 7φ8. By moving the DF device A to the left or right, the document holding plate 12 to which the DF device A is attached can be removed from the copying machine main body and the document table 2. Therefore, inspection and maintenance of the DF device A can be easily carried out by the above-mentioned removal. Also, for simple inspections, etc., use screw 36.
- This can also be done by removing the cover plate 35, which is the cover plate 36.

(7) Additional explanation of sheet document peeling member 24 (t58-1
(Fig. 1) Direction C in which the tangent line 24・a of the lower edge of the sheet original peeling member 24 to the surface of the document table 2 is perpendicular to the reciprocating force direction aeb of the document table
-C, the end surface of the leading edge of the sheet original O5 is the member 24.
It is conceivable that the entire width of the document may hit the end surface of the leading edge of the document at once, causing a shock to the document and damaging the edge of the document or causing the document to shift. Therefore, in this example, as shown in FIG. 8, the contact between the lower edge of the member 24 and the surface of the document table 2 @24a is at an angle θ with respect to the direction C-C perpendicular to the document table reciprocating direction aφb. It's obvious. In other words, the angle 0 is set so that the original O8 and the member 24 smoothly collide and the original is scooped up. In particular, the corner portion 24b that hits first has a larger angle of 0.

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 lower edge always protruding from the slit opening 16 toward the back side of the original holding plate 12.
If the lower edge of the protrusion is fixed in the open position, 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. 16
It is best to keep it in a retracted state.

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 rotating shaft 70 is held by a bearing between the shafts 70 and 21, and a sheet document material fI# member 24 is mounted and held on the shaft 70.
A shaft rotation operating handle 71 is provided at the front or rear end of 0, and when the handle 71 is placed in the upright position shown by the solid line, the upright position of the handle is maintained by a click stopper (not shown). The lower edge of the member 24 is held in a functional state in which it protrudes from the slit opening 16. Handle 71 to axis 7
When the member 24 is tilted and rotated approximately 456 degrees clockwise around 0, 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 to the inside of the slit opening 16. It is switched and held in the retracted storage state.

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 pushed down against the document table 2 and turned off when it is opened and raised. By turning the member 24 counterclockwise via the lever 74)), 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 and maintained. This is what I did.

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

Although the document holding plate 12 which can be opened and closed freely is incorporated into the DF mounting device line document table 2 of the embodiment as a tilting member, an image processing apparatus with or without the document holding plate 12 may be used. It is also possible to have a configuration in which the DF mounting device line alone can be freely 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. As described in detail, the DFIA device of the present invention is operable to open and close with respect to the document table, and is small enough to reduce the shock of tilting the document table, so it is easy to operate and handle. (For example, it is suitable for use in a personal type image processing apparatus with a movable document table.

Further, the sheet document feeding device A shown in the embodiment of the figure has a minimum of
It is equipped with a sheet document introduction port 40 and a sheet document discharge port 41,
A raising/lowering member 12 relative to the document table surface, assembled to the member,
It consists of a sheet original feeding member that rotates or rotates as the original table moves, and a sheet original peeling member 24, and does not require a dedicated power source, synchronization mechanism, or sensors.
Moreover, it is a highly reliable and extremely simple sheet document feeding device, and is suitable for use in the above-mentioned personal type image processing device.

Furthermore, as explained in section (7), the sheet document peeling member 24 has two functions: a functional state in which the sheet document can be peeled off by contacting the document table surface, and a stored state in which it is pulled into the inside of the device and does not come into contact with the document table surface. It is preferable to have a movable structure that can be converted into a DF device, and to keep it in the stored state when the DF device is opened and raised from the document table. That is, if the sheet document peeling member 24 is provided 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 of the sheet document peeling member protrudes outward, so do not accidentally hit or catch your hand or other object on the protrusion. Although there is a possibility that the member may be damaged, such damage is prevented by doing as described above. The functional state/storage state of the sheet document peeling member 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's convenient if you do.

[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 6 (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. This is an example of a mechanism for selectively switching between a functional state and a storage state. 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, and 24 is a sheet original peeling member.

Claims (1)

[Claims] (1) A tilting member that is fixed to the main body of the image processing device with a movable document table and is freely operable to raise and lower with respect to the document table; a sheet document feeding member that performs sheet feeding operation, and a sheet document feeding member that is provided at a position opposite to the tilting shaft side of the tilting member, and is provided at a position opposite to the tilting shaft side of the tilting member, and when the tilting member is tilted against the document table surface, 1. A sheet document feeding device comprising: a member that comes into elastic contact;