JPS6151439A - Sheet document feeder - Google Patents

Abstract

PURPOSE:To smoothly introduce and discharge a document by providing a rising and falling member mounted on a document table surface with a transparent member opposite to an image read portion with a document table interposed therebetween in the falling condition of the above member in a document table moving type image processing apparatus body. CONSTITUTION:In case of automatically transporting a sheet document and copying the document, a document pressing plate 12 is put in the condition of falling down to cover a document table 2, and a document introduction guide tray 42 as a rising and falling member is put in the condition of falling with a suitable angle of inclination to a document introduction port 40. In such a condition, a document Os is placed on the guide tray 42, the leading end portion of the document is inserted from the introduction port 40, and the leading edge of the document is brought into contact with a nip portion between a feed roller 30 and a transparent thin sheet member 24 as a transparent member and stopped. After the document table 2 is moved forward to the terminal position (a'), in case of its returning, the feed roller 30 is rotated through transmitting means, whereby the document Ds is subjected to read processing by an image read portion 1 and discharged from a sheet discharge port 41.

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 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 image processing devices such as copying machines, high-end, high-speed printers are generally used for large and medium-sized models, while personal types are portable, small, lightweight, and light-duty models that are inexpensive. has been developed and commercially available, and is becoming widely popular.

[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, high-speed formation and general image processing devices, and are themselves quite complex, high-grade and expensive devices, and are too expensive to be applied to lightweight models. The function is too high-class and expensive, and it is inappropriate.

Therefore, there is a strong desire for the development and popularization of a simple and inexpensive F device that has a simple mechanical configuration, is highly reliable, and is suitable for use in image processing devices of light models such as personal types. There is.

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 a structure in which the above-mentioned tilting member is fixed to a main body of an image processing apparatus having a movable document table and is freely operable to raise and lower with respect to the document table. When the tilting member is in a tilted state with respect to the document table surface, the document table is placed inside, and the device is positioned facing at least the image reading section of the main body of the image processing apparatus over substantially the entire length of the image reading section, and is in contact with the document table surface or faces the document table surface with a gap therebetween. a transparent member that contacts the document table when the tilting member is in a tilted state relative to the document table surface and rotates or rotates as the document table moves; and a drive member that rotates or rotates as the document table moves; A sheet document feeder that is supported by a bearing in contact with the opposite surface and rotates or rotates at the same circumferential speed as the moving speed of the document table in conjunction with the driven rotation or rotation of the driving member as the document table moves. A feeding member;
a document introducing section for introducing a sheet document between the sheet document feeding member and a transparent member that is in contact with the sheet document feeding member; and a document introduction portion for introducing a sheet document that has passed between the sheet document feeding member and the transparent member Summary of a sheet document feeding device characterized by comprising: a discharge section;

[Effect]

The above-mentioned sheet document feeding device is tilted against the document table of the main body of the image processing apparatus, and the sheet document is introduced from the document introducing section into the space between the sheet document feeding member and the transparent member. Insert the tip into your mouth. In this state, when the document table is driven to move in the direction of conveying the document to the image reading section by the operation of the image processing device main body, the above-mentioned inserted sheet document is placed on the surface of the transparent member by the sheet document feeding member. While being held down, the sheet document feeding member, which is linked to the rotation or rotation of the drive pick-up member as the document table moves, is moved onto the transparent member at the same speed and in the same direction as the document table's movement speed. transported by sliding. The transparent member is positioned facing at least the image reading section of the main body of the image processing apparatus over substantially the entire length of the image reading section, with the document table inside, and is in contact with or faces the surface of the document table with a gap therebetween. , the document being conveyed by sliding on the surface of the transparent member passes through the image reading unit position of the main body of the image processing device, and in the process of passing through the image reading unit, the image of the surface of the sheet document on the transparent member side is transferred to the document table. - The image is read sequentially from the leading edge side to the trailing edge side through the transparent member, and image processing such as copying is executed in the image processing apparatus main body. The sheet document portion that has been slid and conveyed on the surface of the transparent member and passed through the image reading section is guided along the surface of the transparent member to the document discharge section, and finally exits the sheet document feeder as the document table continues to move. Completely drained.

〔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.

(+) 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 an exterior decoration of the copying machine, and copy execution devices 51 to 62 are built inside. 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 to 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; 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. .

65 is a top plate of the copying machine exterior decoration 50, l is a document exposure slit hole as an image reading section formed in the width direction of the top plate at approximately the center 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 focal length lens array 54 is located between the slit hole 1 and the photosensitive drum 51. The document illumination device 53 is the slit hole 1
Illuminates the entire length of the part uniformly from the bottom.

2 is attached to the upper side of the upper plate 65 of the outer decoration of the copying machine.
This is a movable document table made of a transparent flat plate such as a glass plate, which is arranged to be freely slidable in the left-right direction via guide rails 5 and 6 (FIGS. 1 and 3). Specifically, edge members 3 are provided at the front edge and rear edge of the document table 2, respectively, and a relatively wide extension plate 4 is provided.
is provided, and the edge member 3 and extension plate portion 4 are respectively connected to an upper surface plate 65.
It is supported and disposed above via left and right guide rails 5 and 6.

-1- The document table 2 is normally used as a top plate 65 for decoration on the outside of the copying machine.
The solid line claw position in FIGS. 1-2, which falls within the range of , is set as the home position and is on standby. Each time a copy start signal is issued from a control circuit (not shown) facing the front surface, a reciprocating drive mechanism (not shown) such as a pinion rack mechanism or a cable mechanism operates to move the top plate 65'2 to the top right in FIG. It is moved in the forward direction a until it reaches the forward movement end point position a shown by the two-dot chain line, 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 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 of the backward movement, the movement is again changed to the forward movement a and returned to the initial Baum position, completing one reciprocating movement cycle and entering a standby state. Here, for convenience, the forward movement from the home position of the document table 2 to the forward movement end point position a and the forward movement from the backward movement end point position to the home position are described in 1. It is called motion.

Reference numeral 7 denotes a rail strip formed longitudinally along the first side of the extension plate 4 of the document table 2 in the direction of movement of the document table; 8 denotes a fixed member integrated with the exterior decoration of the copying machine on the opposite side of the extension plate 4; Rail strips 9 formed in the direction of movement of the document table at 66, and therefore parallel to the above-mentioned rail strips 7, are engaged with both of the above-mentioned rail strips 7φ8 through engaging rail strips to-11, respectively. , a sliding plate that can freely slide along the rail lines 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. Consisting of a relatively thick hard material layer 12b such as a synthetic resin sponge adhered to the side and a white sheet 12C such as EVAL sheet adhered to the lower surface thereof, it sufficiently covers the entire area of the -L side of the document table 2. It has the size that can be used.

(2) The sheet mode/book mode switching mechanism 14 is -
Regarding the slide plate 9 to which the document presser plate 12 is connected, the sheet mode switching state is set in such a manner that the sliding plate 9 is engaged with a stationary member 66 that is integrated with the exterior decoration of the copier, and the book mode switching state is in which the slide plate 9 is engaged with the original platen 2 side. Condition, stationary member 66 side and document table 2
This is a mode switching piece that selectively switches between three states: 11 - a neutral state that does not affect any of the sides;

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 toward 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 MS, 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.

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 rails 7 and 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 knobs 14a are slid to the seat mode switching position S in the state where they are aligned and correspond exactly (Figs. 1 and 2), the first frame of the frame 14 is moved as shown in Figs. 3 and 4. The distal end of the locking piece 14b passes through the hole 11a formed on the side surface of the engagement rail strip 11 and is fitted into the notch 8a formed on the side surface 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.
side, that is, the copying machine main body side (sheet mode switching state), and when the document table 2 is driven to move, the document holding plate 12 does not move, and only the document table 2 is driven to move. It turns out.

- When the knob 14a is slid to the book mode switching position B, the tip of the second locking piece 14C of the top 14 passes through the hole 10a formed on the side surface of the retaining rail IO. Then, it is fitted into the notch 7a formed on the side of the rail strip 7 on the side of the extension plate 4 of the document table. As a result, the slide plate 9, that is, the original holding plate 12, is in a state where it is integrally locked with the original platen 2 (book mode switching state), and when the original platen 2 is moved and driven, the original holding plate 12 is also locked with the original platen 2. They will move together.

(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 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 positioned facing the original exposure slit hole 1, which is the original document.

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).

17 and 18 (Figs. 1, 3, and 5) are side plates formed by raising the upper surface of the original holding plate at the front and back ends 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/folding) the original 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 is the inclined side wall surface 12 on the left and right sides of the slit opening 16
Attach the Chosenryo class parts to d-12e and open the slit 1.
A transparent thin sheet-like member as a transparent member (for example, a transparent polyethylene terephthalate sheet (trade name: Mylar) with a thickness of about +00 pLm) that covers almost the entire surface of 6.
When the document holding plate 12 is pushed down onto the document table 2, its lower surface comes into elastic contact with the surface of the document table 2.

25 26 and 27 (Figures 5 and 3) are the paper ejection roller shafts 2
2, a position closer to the rear end, and a position closer to the front end than the longitudinal center of the shaft 22. Supported.

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 tips of the second and third arm members 26-27. A sheet document feeding roller shaft rotatably supported by a bearing between the parts, 3
Reference numeral 0 designates a plurality of sheet document feeding rollers mounted and supported on the shaft 29 at intervals along the longitudinal axis, and located within the slit opening 16, and a transparent sheet stretched over the slit opening 16. Contact the -L surface of 24. Reference numeral 31 indicates a rotating shaft supported by a bearing on the tip of the first arm member 25, 32 indicates a drive roller fixed to the rotating shaft, and 33 indicates a timing gear, which is also attached to and supported by the shaft 31 via a one-way clutch 33a. The roller 34 is a timing belt that is stretched between the timing roller 33 and the timing roller 28 fixed to the paper ejection roller shaft 22. The driving roller 32 comes into contact with the upper surface of the front edge member 3 of the document table 2 when the document presser plate 12 is pushed down onto the document table 2.

Reference numeral 70 indicates a timing roller fixed to the middle portion of the paper ejection roller shaft 22, 71 indicates a timing roller fixed to the front end of the sheet document feed roller shaft 29, and 72 indicates a timing roller suspended between the above timing rollers 70 and 71. This is the installed timing belt.

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 of the front bearing plate 20 and the real bearing plate 21 by screws 36, 36 at the bent edge of one side. 3
Reference numeral 7 designates a plurality of sheet document guide fin plates arranged side by side on the back side of the cover plate, and 38, 38, and 39 designate leaf springs that are similarly attached and supported on the back side of the cover plate.
The free end side of the sheet document feed roller shaft 29 is in contact with the upper side of the sheet document feed roller shaft 29 . Further, the leaf spring 39 is in contact with the upper surface of the first arm member 25. The pressing force of the leaf springs 38, 38 as shown in "--" allows each sheet document feeding roller 30 to remain in stable contact with the upper surface of the transparent sheet 24 at all times. In addition, due to the pressing force of the leaf spring 39, when the document holding plate 12 is tilted against the document table 2, the state of contact of the drive take-up roller 32 with the upper surface of the document table front edge member 3 is stably and elastically maintained. Ru.

In this embodiment, the driving number reroller 32 shown in "-" is provided at a position opposite to the tilting shaft 13 side of the document presser plate 12, which is a tilting member, and when the document presser plate 12 is tilted onto the document table 2. It also serves as a member that elastically contacts the document table 2 (in this example, the front edge 3 of the document table), 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 side. 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. (shown by the two-dot chain line in Fig. 2 and Fig. 7). Reference numeral 42a denotes a sheet document side guide side wall formed upward along the back side of the tray. 44b (FIG. 2) is a second convex strip of a plurality of stand lower end receivers 11 formed on the - side of the document holding plate, and the inclination of the tray 42 can be adjusted by selecting the strip for receiving the lower end of the stand. . 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) When in contact, the weight of the original pressing plate 12 is supported by 11 times.

(4) Sheet mode This is a case where a copy sheet original is automatically conveyed using F device A and is copied. 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 (Figs. 1 and 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 device, and the leading edge of the document is brought into contact with and received at the contact nip between the sheet document feed roller 30 and the transparent sheet 24.

Next, press the copy start button 46 (Figs. 1 and 5). The on signal is input to the control circuit, and the document table 2 moves forward in the first half a.
is started. In this case, since the document presser plate 12 is attached to the main body of the copying machine, 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 drive roller 32 in contact with the upper surface of the front edge member 3 of the document table 2 and the shaft 31 integrated therewith are driven to rotate, but the rotation direction is controlled by the one-way clutch 33a. This is the idling direction, and the shaft 3 is rotated through the one-way clutch 33a.
No rotational force is transmitted to the timing roller 33 attached to the timing roller 1. That is, the paper discharge roller shaft 22, the same roller 23, the document feeding roller shaft 29, and the same roller 30 do not rotate.

Therefore, the leading edge of the document O5 is located at the sheet document feed roller 3.
0 and the transparent sheet 24, and is maintained in a received state.

Immediately after the document table 2 reaches the end point position a of forward movement, it begins 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)
Image exposure slit hole 1 is the image reading section of the copying machine main body.
It is located approximately corresponding to the longitudinal axis position of.

When the document table 2 is turned into a backward movement, the drive pawl reroller 32 corresponding thereto is driven to rotate in a direction opposite to that in the case of the first half forward movement a of the document table. Then, the rotation is transferred to the shaft 22 via the shaft 31 → one-way clutch 33a → timing roller 33 → timing belt 34 → timing roller 28.
The paper output roller 23 transfers the sheet document to the output port 41.
The DF device A is rotated in the direction of ejection to the outside of the DF device A. Further, the rotation of -22 is transmitted to the shaft 29 via the timing roller 70 → timing belt 72 → timing roller 71.
The document feeding roller 30 is driven to rotate in the document drawing direction. Note that the rotational peripheral speed of both the paper ejection roller 23 and the document feeding roller 30 is adjusted so that the rotation speed of the rollers 23 and 3 is substantially the same as the backward movement speed of the document table 2.
0, or the diameter of the timing roller etc. is set in advance.

Due to the rotation of the document feed roller 30, the document Os is brought into a state in which the leading edge of the document Os substantially coincides with the position of the document leading edge reference mark M on the document table 2, and the rear side of the document O3 (the guide of the tray 42). The feed roller 30 and the transparent sheet 24 are placed in a state in which the side edge of the document that abuts the inner surface of the side wall 42a is substantially aligned with the edge 2a (FIGS. 3 and 5) of the document table extension plate 4 on the document table 2 side. The transparent sheet 24 is held in its mouth between the two surfaces, and the transparent sheet 24 is held down by the sheet 24, and the transparent sheet 24 is slid and conveyed at the same speed and in the same direction as the backward movement speed of the document table 2, and the images are sequentially conveyed from the leading edge side. It passes through the reading section 1 position. During the passage, the downward image surface of the conveyed document Os is sequentially read from the leading edge side through the document table 2 and the transparent sheet 24.

The document Os is conveyed through the image reading unit 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, as shown in the figure, so that the paper feeding timing on the image processing device B side, etc. The resist matches. Also, one-sided reference transport is performed using the edge 2a on the document table 2 side as a reference.

When the leading edge of the original Os passes through the image reading unit 1 position,
Subsequently, the sheet is smoothly guided toward the discharge port 41 along the surface of the transparent sheet 24, receives a discharge force from the rotation of the paper discharge roller 230 on the way, and exits from the discharge port 41 to the outside of the DF device A. As the document table 2 continues to move backward, the conveyance of the document O8 progresses. FIG. 6(b) shows the state in the middle of the backward movement process of the document table 2. As shown in FIG.

By the time the document table 2 reaches the backward movement end position, the trailing edge of the document Os has passed the image reading unit 1 position, and ■
The paper is completely discharged from the paper discharge port 41 onto the two sides of the document holding plate 12 on the side of the paper discharge port 41 as a tray. FIG. 6(C) is a diagram showing the state at the time when the document table 2 reaches the end position of the backward movement.

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 O5 is automatically conveyed along the surface of the transparent sheet 24 by the feeding roller 30, which rotates in conjunction with the backward movement of the document table 2, and the position of the image reading unit 1 is moved back and forth by the document table 2. It passes at the same speed as the moving speed, and the original Os
In the process of passing through the image reading unit 1 position, the document image is read through the document table 2 transparent sheet 24 (in this example, slit imaging exposure of the document image on the surface of the photosensitive drum 51) is performed sequentially from the leading edge of the image to the trailing edge. A copy is made by copying machine B. The original document Os that has been read is automatically discharged from the DF loading device.

(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 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 above the document table 2 around the shaft 13, and a thick document Oa 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) of the second original platen 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 original holding plate 12 is placed over the stored original 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 covered with a somewhat thick original. It is.

After setting the original OB as described above, the copy start button 46 is pressed. The ON signal is input to the control circuit, and the document table 2 is moved from the first half forward movement a to the backward movement b and the second half forward movement a, as in the sheet mode copying described above. 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 backward, and in the process of reaching the backward movement end point b', the document OB passes through the image reading unit 1 position sequentially from the leading edge side to the trailing edge side, and the image is read, and the image is read. The copy is made by 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. Press the original holding plate 12 from the original platen 2'' and place the original O.
Take out B.

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* of the document table 2. b*a is executed continuously for the set number of sheets,
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 D F device A is set to the neutral switching position N, the first and second locking pieces 14b and 14C of the frame 14 are not engaged with either the immovable member 66 side or the document table 2 side. If the relationship does not match, the slide plate 9, that is, the 4-digit document holding plate 1, is assembled with the DF device A.
2 is freely slidable in the left and right directions along the rails 7 and 8 with respect to the document table 2 or the copying machine body;
By moving the slide plate 9 to the left or right until the slide plate 9 is removed from the rails 7 and 8, the document holding plate 12 with the DF device A attached is moved between the copying machine main body and the document table. It can be removed from 2. Therefore, inspection and maintenance of the DF device A can be easily carried out by removing it as described in ``2''. Also, for simple inspections, etc., use screw +h.
This can also be done by removing the cover plate 35 which is the cover plate 36.

(7) Other configuration examples of the DF device A (Figs. 8 to 10) The DF device A of this example is equipped with a sheet document introduction roller 75, and includes the same components as the example in Figs. 1 to 5. , the common reference numerals will be used and the explanation will be omitted.

The shaft 29 of the sheet document feed roller 30, the shaft 22 of the paper discharge roller 23, and the shaft 76 of the sheet document introduction roller 75 are all supported by bearings so that they can rotate freely in parallel between the front bearing plate 20 and the rear bearing plate 21. It is.

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. The feeding roller 30 has first to fifth
As in the case of the illustrated device, it is in contact with the upper surface of a transparent sheet 24 as a transparent member provided so as to close the slit opening 16.

Reference numeral 32 denotes a drive roller, which in this embodiment is fixed to a position close to the front end of the sheet document feeding roller shaft 29. This roller position is outside the passage area of the largest size document that can be introduced into the DF apparatus and the image reading area of the image reading section 1. A through hole 24a is formed in the surface of the transparent sheet 24 corresponding to the roller 32, so that the lower surface of the roller is excluded.
When it is tilted upward, the lower surface of the roller is in contact with the surface of the document table 2.

Reference numerals 77078 denote a first gear and a first timing roller 79 and 80 respectively attached to the front end of the sheet document feeding roller shaft 29 via one-way clutches 77a and 78a.
A second gear and a second timing roller 81 and 82 are respectively attached to the front end of the paper ejection roller shaft 22 in an open and fixed manner.
are a pair of mutually meshing idler gears, which are supported by the front bearing plate 20 so as to be freely rotatable around the bottle shafts 81a and 82a, and one of the idler gears 81 is connected to the first gear 77, and the other idler gear 82 is connected to the first gear 77. is the second
They mesh with gear 79, respectively. A timing belt 83 is suspended between the first and second timing rollers 78 and 80.

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 placed over the document table 2''2, the drive take-up roller 32 comes into contact with the surface of the document table 2, so that the document table 2 is moved forward and backward. It rotates accordingly.

Therefore, the sheet original feeding roller shaft 29 is integrated with the driving roller 32, and the sheet original feeding roller 3 is integrated with the shaft.
0 also rotates together with the drive taking roller 32. The diameter of the sheet document feeding roller 30 is set so that its rotational circumferential speed is substantially the same as the moving speed of the document table 2.

Here, the driving roller 3 accompanying the forward movement a of the document table 2
2 and forward rotation of the rotation direction X of the shaft 29 integrated with the roller;
On the other hand, when the rotational direction Y associated with backward movement is reverse rotation, each of the one-way clutches 77a and 84a of the first gear 77 and the third timing roller 84 causes the shaft 29 to rotate in the reverse direction Y, that is, the document table 2 Only during backward movement, it engages with the gear 77 and roller 84 to cause the gear and roller to rotate in reverse Y together with the shaft 29. - Contrary to the above, the one-way clutch 78a of the timing roller 78 is activated only when the shaft 29 rotates in the forward direction
7 to cause the roller to rotate forwardly X together with the shaft 29.

Therefore, when the document table 2 is moving forward, the sheet document introducing roller 75 stops because the rotational force of the shaft 29 in the normal rotation direction X is not transmitted to the third timing roller 84.
However, when the document table 2 is in the backward movement, the rotational force of the shaft 29 in the reverse direction Y is applied to the one-way clutch 84 a + third timing roller 84 → timing belt 86 → fourth timing roller 85. The signal is transmitted to the shaft 76 through the shaft 76, and 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. The diameters of the timing rollers 84-85 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 port 23 is 17, the rotational force is transmitted to the idler gears 81 and 82.
→Second gear 79→Transmitted to the paper ejection roller shaft 22, and the shaft 2
2 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.
Since the rotational force is transmitted to the timing belt 83 → second timing roller 80 → paper ejection roller shaft 22
The shaft 22 rotates in the same Y direction as the shaft 29, and the roller 23 rotates in the document ejection 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.

Figures 1θ (a) to (e) show the DF device A of this example.
FIG. 3 is a diagram showing the document feeding process during sheet mode copying according to FIG. In this figure, only the sheet document introduction roller 75, the sheet feeding roller 30, the paper ejection roller 23, and the transparent sheet 24 of the DF apparatus A are shown for the sake of simplicity.

■(a) The figure shows the standby state, and the upper surface 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 Os is placed with the image side facing downward. (2) The original Os is set in such a state that it abuts against the mutual contact nip between the original introduction roller 75 and the inclined side wall surface 12d of the slit opening 16, which is the leading edge of the original. Of course, it is also possible to provide a dedicated original introduction guide tray 42 as in the examples shown in FIGS. 1 to 5, and use it to perform the above-described setting of the original Os.

(2) Next, when the copy start button is pressed, the document table 2 moves forward in the first half a and reaches the forward end position a. (b) The figure shows the state at this point. During the forward movement a of the first half of the document table 2, 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 ((a
), but the document introduction roller 75 does not rotate and stops.
- kept in condition. Therefore, the set original Os is not fed and the initial set state is maintained as it is.

When the document table 2 reaches the forward movement end position a, the document leading edge reference mark M position on the right side of the document table 2 is located at the document feeding roller 3.
It is located a distance 1Iil to the left of the contact portion between the document plate 2 and the document platen 2. This distance Ml is determined by the leading edge position of the original Os received in the contact nip between the original introducing roller 75 and the inclined side wall surface 12d of the slit opening 16, and the distance between the original feeding roller 30 and the surface of the transparent sheet 24. It is approximately equal to the length of the document conveyance path to the contact point.

(2) Upon reaching the action end position a, the document table 2 immediately begins to move backward. Along with this backward movement of the document table 2, the document introduction roller 75, the document feed roller 30, and the document discharge roller 2
All the rollers No. 3 are rotated in the Y direction, and the original Os is automatically drawn into the DF mounting device by the rotational force of the original introduction roller 75. When the leading edge of the drawn original Os reaches the contact area between the original feeding roller 30 and the transparent sheet 24, the position of the original leading edge reference mark M on the original table 2 also reaches the position of the contact area T degrees, and the image processing device The registration with the paper feed timing etc. on the B side matches.

(C) The figure shows the state at this point.

Due to the subsequent backward movement of the document table 2, the document Os is held between the feeding roller 30 and the transparent sheet 24 and pressed against the surface of the transparent sheet 24, as in the case of the apparatus shown in FIGS. 1 to 5. The document slides along the surface of the transparent sheet 24 in the same direction at the same speed as the backward movement speed of the document table 2 while passing through the image reading section 1 position sequentially from the leading edge side. After the leading edge of the document Os passes through the image reading unit 1 position, it is guided along the surface of the transparent sheet 24 toward the ejection port 41. On the way, it receives ejecting force from the rotation of the ejecting roller 23, and is transferred to the DF device A. go outside.

■ The rear end of the document O8 is removed from the contact area between the document feed roller 30 and the transparent sheet 24 and passed through 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 will be completely ejected out of the DF device A. If the document Os is large in size, the rear end portion is not yet completely removed from the discharge port 41 when the document table 2 reaches the end position of the backward movement. Figure (d) shows this state.

However, even in such a state, until the document table 2 continues to move in the second half forward movement a and returns to the initial home position, the paper ejection roller 23 continues to move in the Y direction, that is, as in step 17 above. Since it rotates in the document ejection direction, the large size document O5 is also completely sent out to the outside of the DF device A.

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.

(8) In addition, the document feeding roller 30 may be an endless belt member that contacts the surface of the transparent sheet 24 and rotates as a result.

In the apparatus shown in FIGS. 1 to 5, the drive claw reroller 32 is the eighth
The driving roller 32 in the device shown in FIGS. 8 and 9 may be driven by contacting the document platen 2 as in the device shown in FIG. 9, or vice versa. It may also be driven by being brought into contact with the edge member 3 of the document table 2, as in the case of a device.

The lower surface of the transparent member 24 may be configured so that it does not come into contact with the surface of the document table 2 when the document holding plate 12 is folded relative to the document table 2, but faces the surface of the document table 2 with a gap therebetween.

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. It is also possible to have a configuration in which the DF unit HA 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 A of the present invention described above has a dedicated power source,
This is an extremely simple sheet document feeding device that does not require a synchronization mechanism or sensors and is highly reliable, making it suitable for use in the above-mentioned personal type image processing device.

Alternatively, for example, as shown in FIGS. 11(a) and 11(b), the sheet original Os is introduced directly onto the second surface of the original table, is conveyed together with the original table, and is passed through the reading section, and the original that has passed through the reading section is read as the original. It is also possible to consider a configuration in which the document is brought into contact with the table surface, and the document is scooped from the table surface by a peeling member 80 made of an elastic sheet material, separated, and deflected toward the ejection port. The load applied to the edges of the document tends to cause misalignment of the document and damage, wrinkles, and folds at the leading edge of the document. Therefore, as shown in the examples in FIGS. 12(a) and 12(b), an angle θ is set between the tangent 80a of the peeling member 80 and the surface of the document table 2 to the direction C-C perpendicular to the reciprocating direction aeb of the document table. It may be possible to make the scooping of the document smoother by attaching the paper, but in reality -1-, sufficient scooping could not be achieved.

Furthermore, even when the DF device is opened and raised from the document table, the peeling member 80 described in 1- is in a state in which the tip side of the sheet document peeling member protrudes outward. There is a possibility that the member may be damaged by colliding with it or getting caught on it.

In this regard, the present invention provides a structure in which, when the tilting member is in a tilted state with respect to the document table surface, the tilting member is positioned facing substantially the entire length of at least the image reading section of the main body of the image processing apparatus with the document table inside, and is in contact with the document table surface or has a gap. Since the configuration is such that image reading is performed by providing a transparent member facing each other and feeding a sheet original along the surface of the transparent member, the transparent member serves as a continuous guide member from the original introduction side to the output side. Therefore, the introduction and ejection of originals is always carried out stably and smoothly without any problems like those described in L.

[Brief Description of the Drawings] Fig. 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, and Fig. 3 is a portion of the DF device. 4 is an enlarged sectional view of the mode switching piece, FIG. 5 is a plan view of the DF blue part with the cover plate removed, and FIGS. 6(a) to 6(C) are Original feeding process diagram during sheet mode copying, No. 7
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 main parts of another embodiment of the DF device, FIG. 9 is a side view thereof, and Figure 1O (a) to (e) are sheet document feeding process diagrams, Figure 11 (a)
・The same figure (b) is a plan view and a side view of the original peeling member, the 12th
Figures (a) and (b) are a plan view and a side view of another example of the document peeling member. A is a DF device, B is an image processing device, 1 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.

Claims (1)

[Claims] (1) A tilting member that is locked to the main body of the image processing device with a movable document table and is freely operable to raise and lower it with respect to the document table surface, and when the document table is in a tilted state with respect to the document table surface, an image is generated with the document table inside. a transparent member located in at least the image reading section of the processing device main body so as to face substantially the entire length of the image reading section and in contact with or facing the document table surface with a gap therebetween; a drive take-up member that is in contact with the document table and rotates or rotates as the document table moves; and a drive take-up member that is in contact with and bears a surface of the transparent member on the side opposite to the document table; a sheet document feeding member that rotates or rotates at the same circumferential speed as the moving speed of the document table in conjunction with the driven rotation or rotation accompanying the movement of the document table; and a contact between the sheet document feeding member and the member. A document introducing section for introducing a sheet document between the sheet document feeding member and the transparent member; and a discharge section for the introduced sheet document that has passed between the sheet document feeding member and the transparent member. sheet document feeding device.