JPS60232361A - Document transport apparatus - Google Patents

Abstract

PURPOSE:To discharge documents in the same order of pages as copy sheets are put in order by bringing scoop-up means into contact with a document table to scoop up a document, and reversing the document to be discharge with an image surface thereof up in case of a sheet document. CONSTITUTION:In case of a sheet document, a sheet document feeder 2 is connected to a main body apparatus 1 and stopped, and a sheet document is fed from the sheet document feeder 2 into a reciprocating document table 3. When the document table 3 is moved in the opposite direction to the moving direction of the document table 3 for reading an image, scoop-up means 85 for scooping up the document after reading from the transparent document table 3 is brought into contact with the document table 3, and the document is reversed to be sequentially discharged with an image surface thereof up onto a paper discharge tray 6. That is, if the main body apparatus 1 is a copying machine, the documents are discharged in the same order of pages as the copy sheets are sequentially discharged onto a copy tray 21, with an image surface up.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for conveying a document to a reading position in a copier/facsimile device for reading and processing correspondence documents.

[Conventional technology and problems]

In recent years, various document reading and processing devices have become popular for transmitting information.
It has become widely used even in small businesses. In order to streamline and automate the work of such processing devices as much as possible, various devices for automatically transporting documents to the document reading position of the processing devices have been developed and put into practical use.

The information to be transmitted includes a thin sheet document and a thick document, such as a book document. There is a need for a document reading and processing device that can be used for both of these types of documents, and is also required to be compact, simple in handling operations, inspection and maintenance, and low cost.

The biggest bottleneck in meeting the above-mentioned requirements is mainly the problem of switching the conveyance of sheet (thin) originals and book (thick) originals to the reading section.

In addition, in this type of device, in the case of sheet document feeding, in order to eject the original on the document table after image reading, the document is scooped up from the document table in the direction of movement of the document table during scanning of the document. If the originals are ejected in the same orientation as when placed on the document table, the originals will be stacked on the ejection tray with the image side facing down. Therefore, when the main device that reads and processes documents is, for example, a copying machine, there is a drawback that the page order is reversed from that of copy paper that is delivered from the copying machine onto a copy tray with the image side facing upward. To solve this problem, scoop the document from the document table in the direction of movement of the document table during image reading, and then turn it over.If you eject the document toward the paper feed tray with the image side facing up, the paper ejection tray will be removed. It must be installed above the paper feed tray, and when a user attempts to feed paper on the paper feed tray, the paper ejection tray becomes an obstruction, resulting in poor operability.

[Purpose, structure, and effect of the invention]

This invention was developed with the aim of obtaining something that does not have such problems, and includes a main unit 1 for reading documents.
, a platen glass or document table 3 that reciprocates to convey documents to the reading position 8, and a document feeder 2 that feeds a sheet document 0 (S) (FIG. 2) toward the document table 3. Consists of Department. Switching means 38, 43-44 for processing sheet originals and book originals are provided, and in the case of sheet originals, the sheet original feeder 2 is connected to the main unit l and stopped, and the sheet original 0 (S) is The sheet is fed from the document feeding device 2 toward the document table 3 that moves back and forth.

In the case of a book document, the sheet document feeder 2 is switched to reciprocate together with the document table 3, and the book document 0 (B) (FIG. 7) placed on the document table 3 is transferred to the sheet document feeder 2. It is constructed so that it can be conveyed by holding it down with 2.

In addition, in the case of sheet document feeding, a scooping means 85 is provided on the transparent document table for scooping the original from the transparent document table when the document table is moved in the opposite direction to the direction in which the document table is moved during image reading. 3, scoops up the document, inverts it, and discharges the document with the image surface facing upward.

By configuring as described above, a document conveying device that can be used for both sheet mode and book mode can be configured easily and compactly. And just by operating the mode switching lever 38,
Mechanical conversion between sheet document conveyance and book document conveyance is performed, and reversible switching between book and sheet is possible immediately, and the operation is simple and inexpensive.

Further, in the case of sheet document feeding, the documents on the document table whose images have been read are sequentially discharged onto the paper discharge tray 6 with the image surface facing upward. That is, the main device l that reads and processes documents.
For example, when the copying machine is a copying machine, the pages are ejected to the copy tray 21 in the same page order as the copy sheets that are sequentially ejected with the image side facing upward. The sheet document discharge tray 6 can be disposed at a different position from the paper feed tray 21 position, and operability is also improved.

Although the present invention is applied to various document reading devices, it is particularly applicable to electronic copying machines and is extremely suitable for miniaturizing the same.

〔Example〕

An embodiment in which the present invention is applied to an electronic copying machine will be described below.

Figure 1 is an external perspective view, and Figure 2 is a longitudinal front view, where l is a copying machine with a movable document table (hereinafter referred to as a copy machine), 2 is a document feeder, and 3 is a transparent document table that is interlocked with cables. Or, by interlocking the pinion and rack, the figures 1 and 2 can be attached to the copier body.
The position indicated by the solid line in the diagram is the home position, and the position is 2 to the left on the diagram.
It is driven forward as shown by the dotted chain line a, and when it reaches the end point of the forward movement, it is driven back to the initial home position. The reciprocating drive mechanism is omitted from the drawings because a well-known mechanism can be used as appropriate.

When copying a sheet document (hereinafter referred to as sheet mode), the document feeding device 2 is fixed to the copying machine main body 1 side by switching means 38 and 43, which will be described later. A sheet document 0 (
S) (FIG. 2) is guided to the document table 3 moving leftward and subjected to slit exposure, and sent to the document tray 6 when the document table moves backward.

In the case of copying a book or other thick original (hereinafter referred to as book mode), the switching means 38 and 44 fix the original feeding device 2 to the original platen 3 side. The paper discharge tray 6 is rotated around the hinge portion 6a as shown by the two-dot chain line in FIG. 6, and folded onto the paper feed tray 4. Place the document on the document table 3 with the document feeder 2 temporarily raised from the document table 3 around the shaft 45 as shown by the two-dot chain line in FIG. (
(FIG. 7) The device 2 is placed on top as a document holder, and the document feeder 2 is also caused to reciprocate together with the document table 3.

A document processing mechanism is housed in the copying machine main body l as shown in the second diagram. This example shows an example of an electronic copying mechanism.
Slit exposure section 8, original illumination lamps 8a and 8a, reflecting mirrors 9I to 94, imaging lens io, photosensitive drum 11, chargers 12 and 13, developing section 14, transfer section 15, cleaning section 16, transfer paper feeding section 17. Transfer paper guide 18/19,
It consists of a fixing device 20 and a tray 21.

FIGS. 3 and 5 are cross-sectional side views taken along the line ■-■ and the line V-v in FIG. 1, respectively. One side of the document table 3 (the opposite side in FIG. 1) is supported by a receiving plate 23 in the main body 1 via an Accuride rail 22 arranged in the direction of reciprocating movement of the document table 3. As shown in FIGS. 1.5 to 7, the side edges are fitted into and supported by guide rails 24 disposed on the main body 1 in the direction of reciprocating movement of the document table 3, and are guided along the rails. 25 is manuscript table 3
It is a frame plate attached to one side of the frame and extended laterally. Also,
An Accuride rail 27 is also fixed to the frame plate 25, and a bottom plate 39 of the document feeder 2 is fixedly supported on this rail.

The document table 3 has rails 22 and 22 in the forward direction a and backward direction.
24, but is immovable in a direction perpendicular to the a-b direction. Also, the document feeder 2
Similarly, it is possible to slide along the rail 27 in the a and b directions, but it is immovable in the direction perpendicular to the asb direction.

In other words, the document table 3 and the document feeder 2 can each independently slide in the a11b direction with respect to the copying machine main body l, but remain immovable in the direction perpendicular to the aeb direction.

A pair of positioning rollers 26 (FIGS. 1, 5, 6, and 7) are provided on the left and right sides of the front side of the document feeder 2. Also, 2
Reference numeral 8 denotes a pair of cams extending from the bottom plate 39, and one pair is provided on the left and right sides. Reference numeral 29 denotes a pair of guides formed in a part of the document feeding device 2, and a pair of guides are formed on the left and right sides of the rear side of the position facing the cam 28.

Reference numeral 7 denotes a sheet mode/book mode switching shaft, which is connected to a pair of left and right cut pieces 39a, 39a (88 As shown in FIG. 3, the document table 3 is rotatably supported on a bearing with its axis parallel to the direction of reciprocating movement of the document table 3. 3
9b and 39b are bearings attached to the cut and raised pieces 39aφ39a.

Reference numeral 38 denotes a mode switching lever that is fixed approximately at the center of the mode switching shaft 7, and the shaft 7 is rotated clockwise or counterclockwise by this lever.

A total of four opening/closing swing plates 42 (Fig. 8), two on each end of the left and right sides of this shaft 7, are fixed, and each of the two opening/closing swing plates 42 on the left and right sides has a link 40
One end side of the two is connected via a shaft 41. The other ends of the left and right links 40 are connected to the document feeder 2 via a shaft 45.
This is by concatenating them.

The document table 3 and document feeder 2 are positioned at the home position shown by the solid lines in Figure 1. etc. by hand to position them at their respective home positions.When the document table 3 is located at the home position, this is detected by the home position sensor (sensor 101 of the control circuit in FIG. 16).
When the mode is changed and the 8-38 is rotated clockwise in FIG. Concave portion 43A of main body side fixing member 43 fixed to the side (
Figures 3 and 4). This allows the document feeder M2
is immovably locked to the copying machine main body l side. Also, due to this switching, the protrusion 38C of the switching lever 38 is connected to the bottom plate 3.
When the seat mode detection microswitch 463 added in 9 is turned on, it is detected that the seat mode has been switched to the seat mode and is inputted to the control circuit 100 (FIG. 16).

On the other hand, as the switching lever 38 is rotated to switch to the seat mode S position, the shaft 7 and the opening/closing rocking plate 42 fixed to the shaft rotate clockwise. This causes the opening/closing swing plate 42 to move to the fifth position.
As shown in the figure, the rocking plate 4 is in an upward standing position.
The entire portion of the document feeder 2 on the document table 3 side, which is connected to the document feeder 2 via the link 40, is pulled toward the shaft 7 side, and the positioning roller 26 is placed on the guide rail 24, and the guide 2
By placing the document feeder 9 on the cam 28, the document feeder 2 is positioned with respect to the platen glass 3 in the height direction. In this state, a gap 31 is created between the pressure bonding sheet 30 provided in the document feeder 2 and the document table 3.

Conversely, when the mode switching lever 38 is rotated counterclockwise in FIG.
A is removed from the recess 43A of the fixing member 43 on the side of the copying machine main body L, but another protrusion 38B of the lever 3B
It fits into the recess 44A of the document table fixing member 44 fixed to the side. As a result, the document feeder 2 is released from the copying machine main body l side, and conversely becomes locked to the document table 3. Also, due to this switching, the protrusion 38D of the switching lever 38
When the book mode detection microswitch 46B attached to the bottom plate 39 is turned on, it is detected that the book mode has been switched to the book mode and is inputted to the control circuit 100.

On the other hand, as the switching lever 38 is switched to the book mode B position, the shaft 7 and the opening/closing swing plate 42 are rotated counterclockwise. As a result, the opening/closing swing plate 42 changes from the upward standing position shown in FIG. 5 to the sideways falling position shown in FIG. The entire portion of the document feeder 2 on the document table 3 side is pushed and moved in the direction away from the shaft 7 side, and the positioning roller 2
6 comes off from the top of the guide rail 24 and falls down, and the guide 29 comes off from the top of the cam 28 and falls down. The fruiting device 42 is changed from the state shown in FIG. 5 to the state where the pressure bonding sheet 30 is in contact with the surface of the document table 3 as shown in FIG. 6.

As shown in FIGS. 8 and 9, there are horizontal pins 42 on the outer surfaces of the left and right ends of the opening/closing rocking plate 42 fixed to the mode switching shaft 7, respectively.
a, and install a trouble spring 4 between each pin and the bottom plate 39.
2b is stretched. This trouble spring stably maintains the switching state of the sheet mode S position or the book mode B position of 8-38.

That is, when in sheet mode S, the document feeder 2 is locked to the copying machine main body L side and reciprocated only about the document table 3, and in this case, the sheet document is transferred between the document table 3 and the pressure-bonded sheet 30 of the document feeder 2. The document feeder 2 is installed with a gap 31 between the document table 3 and the pressure bonding sheet 30 so that the document feeder 2 can pass smoothly between the document table 3 and the pressure bonding sheet 30, and in order to prevent contact sliding load between the document table 3 and the pressure bonding sheet 30 during reciprocating movement of the document table 3. Displace it so that it occurs. When in book mode B, the document feeder 2 is locked to the document table 3 side and reciprocated together with the document table 3. In this case, the document feeder 2 is moved in order to bring the book document into close contact with the document table 3. The pressure bonding sheet 30 surface is configured to be displaced in a direction in which it comes into contact with the document table 3 surface.

Fig. 10 is an enlarged cross-sectional view of the document conveyance/ejection roller mechanism portion of the document feeder 2, Fig. 11 is a cross-sectional view of the section taken along the line XI-XI in Fig. 10, and Fig. 12 is the section taken along the line shown in Fig. 1O. 13 is a rear view of the drive system.

In FIG. 11, reference numerals 51 and 52 denote a front plate and a rear plate of the document feeding device 2, to which a front arm support shaft 531 and a rear arm support shaft 532 are fixedly provided, respectively. In addition, each arm support shaft 53.6532 has a conveyor roller arm 54□・
542 is swingably supported. The conveyance roller 56 is fixed to the conveyance roller shaft 55. The conveyance roller 55 is connected to the conveyance roller arm 54. - Rotatably supported by 542. Conveyance roller arm 54. A conveyance roller spring 57 (FIG. 1θ) is hung on each of the middle portions 542, and presses the conveyance roller 56 against the surface of the document table 3.

A paper discharge drive arm 58 and an idler gear 59 (FIGS. 11-13) are supported on the rear arm support shaft 532.

Further, a paper ejection drive shaft 60 is fixedly mounted on the paper ejection drive arm 58, and a paper ejection drive and reroller 61, which is integrated with a gear 61a meshing with an idler gear 59, is rotatable on the shaft 60. is supported by A friction plate 62 is attached on the frame plate 25 in the direction of reciprocating movement of the document table 3.
The paper discharge drive and reroller 61 are in contact with this friction plate 62 and are rotationally driven by the reciprocating movement of the document table 3.

Reference numeral 63 denotes a paper ejection roller shaft, on which a paper ejection roller 64 and a paper ejection gear 65 made of an elastic material such as sponge are fixedly mounted. The paper ejection gear 65 meshes with the idler gear 59, and drives the paper ejection and reroller 61 as the document table 3 reciprocates.
The rotation of gear 61a, idler gear 59, and paper ejection gear 65
- It is transmitted to the paper discharge roller 64 via the shaft 63, and the roller 64 rotates.

66 (Fig. 1O, 12, 13) is the paper feed roller shaft;
A paper feed roller 67 and a paper feed gear 68 are fixedly installed, and are rotatably supported by bearings between the front side plate 51 and the rear side plate 52. A document holding arm 69 is rotatably engaged on the paper feed roller shaft 66, and the document holding arm 69 rotatably supports a document holding roller shaft 71 on which a document holding roller 70 is fixed. ing. Further, a document presser spring 72 (FIG. 10) is hung on the document presser arm 69, and presses the document presser roller 70 against the surface of the document table 3.

A paper feed drive shaft 74 is mounted on a paper feed drive arm 73 (FIGS. 12 and 13) rotatably supported on the paper feed roller shaft 66.
A gear 75a meshed with the paper feed gear 68, and a paper feed drive and reroller 75 integrated with the gear 75a are rotatably supported on the shaft 74. The paper feed drive and reroller 75 is in contact with the upper surface of the friction plate 62 in the same manner as the above-mentioned paper ejection drive and reroller 61, and is driven to rotate as the document table 3 reciprocates. Gear 75a @ gear 6811 is transmitted via shaft 66, and the roller 67 is rotationally driven.

In other words, as will be described later, in the sheet mode, the conveyance roller 56 and document holding roller 70 that press the sheet document against the surface of the document table 3 simply transfer and rotate the document table 3 surface as the document table 3 reciprocates to hold the document. Press the document onto the platen surface and eject roller 64
The paper feeding rollers 67 are provided separately from the conveying roller 56 and the document pressing roller 7o, respectively, and are driven to rotate by receiving power from the drive for converting the forward motion of the document table 3 into rotational motion and the rerolling rollers 61 and 75. With this configuration, the document is conveyed together with the document table 3 without sliding on the document table surface.

Reference numeral 76 (Fig. 10) is a paper feed swing shaft, and on the shaft there is a plate spring 78 that supports the paper feed roller 77 and a registration shutter 79.
are integrally provided. Further, a paper feed swing arm 8° (FIG. 13) is fixedly mounted on the paper feed swing shaft 76.

This paper feed swing arm is engaged with a paper feed plunger link 82 that is engaged with a paper feed plunger 81, and is swung around a shaft 76 as the paper feed plunger 81 is turned on and off.

When the paper feed plunger 81 is off, the leaf spring 78 and the registration shutter 79 are held in the first position shown by the solid line in FIG. 10, and when it is on, they are held in the second position shown by the two-dot chain line. In the first position, the paper feed roller 77 is the above-mentioned paper feed roller 6
7, and the tip of the registration shutter 79 is located at the sheet exit portion of the sheet feed path 5a extending from the paper feed port 5 to the document table 3, so that the sheet exit portion is closed. In the second position, the paper feed roller 77 descends relative to the paper feed roller 67 and is held in contact with the paper feed roller, and the tip of the registration shutter 79 escapes from the sheet exit portion of the paper feed sheet path 5a. The sheet exit section is held open by the movement.

Reference numeral 83 (FIG. 1θ) is, for example, a reflective optical sensor for detecting the presence or absence of a document, which is disposed in the paper feed sheet path 5a.

Reference numeral 84 denotes a sheet original scooping shaft, and a sheet original scooping sheet 85 is attached to and supported by the shaft. As will be described later, this skimming sheet 85 is obtained by placing the read-processed sheet original on the document table 3 in the sheet mode.
It serves to pull it apart from above. 86 (FIG. 13) is a scooping swing arm fixedly attached to the scooping shaft 84. This arm 86 is engaged with a scooping plunger link 88 that is engaged with a scooping plunger 87, and swings about the shaft 84 when the scooping plunger 87 is turned on and off. When the plunger 87 is off, the tip of the scooping sheet 85 is placed in the first position away from the document table 3.
It is held in the first attitude shown by the solid line in the θ diagram, and when it is on, it is held in the second attitude where the tip is in contact with the surface of the document table 3 as shown by the two-dot chain line. The scooping sheet 85 is made of an elastic sheet-like material such as a Mylar sheet (polyethylene terephthalate sheet) so that when it comes into contact with the surface of the document table 3, it contacts uniformly over its entire width.

By constructing the sheet original scooping means with the elastic sheet-like body 85 in this manner, it is possible to reliably and smoothly peel off the sheet original that is in close contact with the original on the original table 3 without damaging the original.

Regarding this sheet document scooping sheet 85, if the tangent line of the sheet to the document table 3 is perpendicular to the reciprocating direction of the document table 3, the edge end surface of the full width of the sheet document will be at the tip of the document document table 85. It is conceivable that the entire width of the document may hit the edge surface 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. 14, a tangent 301 between the scooping sheet 85 and the document table 3 is at a certain angle .theta. In other words, original 0 (S) and scooping sheet 85
Adjust the angle θ so that the documents collide smoothly and the original is scooped up.
is the provision. Especially the first corner part 3
04 has a larger angle θ.

In this way, by attaching the scooping means at an angle to the edge line of the document so that the document and the scooping means do not collide with the full width at once, the document is always scooped smoothly from the document table.

Further, the positional relationship in the depth direction between the scooping sheet 85 and the document is such that the back wall on the paper feed tray is configured such that the back edge of the document is always located at the steeply angled portion 304 of the scooping sheet. .

The platen glass 3, which is a document table, has a surface that has a coefficient of friction greater than the friction coefficient between the document O(S) and the conveyance roller 56 and document holding roller 70, which are auxiliary means for pressing the document onto the document table surface, as shown by reference numeral 3a in FIG. , a transparent material layer (friction sheet layer) is formed of a material that increases the coefficient of friction between the document and the document table. This layer 3a is formed by laminating, for example, Mylar sheets that are thin and transparent so as not to affect the image. Alternatively, the surface of the document table 3 may be directly coated with a material having a high coefficient of friction6, for example, a To (indium oxide salt) film may be coated.

By forming such a layer 3a, even if the 'A position vibrates and the document holding means vibrates with respect to the document table,
Since the original is not in close contact with the original table due to the frictional force with the above-mentioned material layer, no misalignment occurs.

The transparent document table is not limited to glass, and any material that can be used as a document table, such as transparent plastic, can be used.

A Sheet document processing (sheet mode) (1) Rotate the paper output tray 6 to the left side of the document feeder 2 around the hinge part 6a (Figure 1) as shown by the solid line in Figures 1, 2, and 10. . With the document table 3 and the document feeder 2 at the home position, the mode switching lever 38 is set to the sheet mode S position. As a result, the document feeding device 2 is immovably locked to the copying machine main body l side as described above (FIG. 3). The fact that the microswitch 46S is turned on to switch to the seat mode is input to the control circuit 100. The paper feed plunger 81 is in the off state, so the leaf spring 78 and the registration shutter 79 are kept in the first position shown by solid lines in FIG.
7 and held upward, and the sheet exit portion of the paper feed sheet path 5a is closed by a registration shutter 79 and is in a closed state. The scooping plunger 87 is in the off state, so the tip of the scooping sheet 85 is in the original platen 3.
It is held in the first position away from the plane, as shown by the solid line in Figure 1O.

(2) Place the sheet original 0 (S) (Fig. 2) to be copied on the paper feed tray 4 of the document feeder 2 with the image surface facing downward, and insert the leading edge of the original into the paper feed tray 4 from the paper feed port 5. path 5a
Insert the document until the leading edge of the document hits the registration shutter 79. This document insertion is detected by sensor 83, and a document presence signal is input to control circuit 100.

(3) Set the number of copies, paper size, copy magnification, copy image density, and other copy conditions by operating m93 on the copying machine main body 1. These setting conditions are input to the control circuit 100. Next, turn on the copy start button 93a.

(4) Forward drive a of the document table 3 is started. At the same time, the paper feed plunger 81 is turned on, the paper feed roller 77 pinches the leading edge of the document inserted into the paper feed sheet path 5a and is pressed against the paper feed roller 67, and the registration shutter 7
9 is released (second posture 8 shown by two-dot chain line in Figure 1O)
. Paper feeding drive and reroller 7 accompanying the forward movement a of the document table 3
5 is transferred on the friction plate 62, and its rotational force is applied to the paper feed roller 6.
7, and the roller 67 begins to rotate in the document drawing direction. Due to the rotational force of the paper feed roller 67, the document is synchronously conveyed from the paper feed sheet path 5a to the surface of the document table 3 at the same speed as the forward movement speed of the document table 3, and the original is sequentially brought into close contact with the document table 3. The document is transported in the forward movement direction of the document table 3 without any slippage between the document table 3 and the surface of the document table.

Then, the conveyed document passes through the slit exposure section 8 to the document table 3.
Then, the paper is further transported while being pressed against the surface of the document table 3 by the transport rollers 56. As the document passes through the slit exposure section 8 together with the forward document table 3, the downward image surface of the document is sequentially subjected to slit exposure processing from the leading edge of the document to the trailing edge, and the copying process of the document image is performed. This is executed by the copying mechanism inside the copying machine main body l.

As the document progresses with the forward movement a of the document table 3, when the trailing edge of the document passes the sensor 83 position, the sensor 83 detects the passage, and the signal is sent to the control circuit 100. is input.

The timer circuit is then started from that signal point in time. The timer circuit is configured such that the document is transported as the document table 3 continues to move forward from the time of the above-mentioned signal, and the trailing edge of the document passes through the slit exposure section 8 and reaches a position Q (No. Figure 10.

The required conveyance time until the conveyance roller 56 reaches a position where the conveyance roller 56 is not completely removed is set in advance as a timer time. When the predetermined timer period elapses after the sensor 83 detects that the rear end of the document has passed the position of the processor 83, the forward movement a of the document table 3 is stopped. Therefore, from the start of the forward movement of the document table 3 until the forward movement is stopped as described above, the document sequentially passes through the slit n tip 8 positions from the front end to the rear end, and the entire document Exposure processing can be performed on surfaces.

In other words, the document detection sensor 83 and timer detect the length (length and size) of the document sent from the document feeder 2 to the document table 3 in the feeding direction, and the forward movement length of the document table 3 is controlled accordingly. Ru. In other words, the forward movement of the document table 3 is controlled by the necessary forward movement distance depending on the size of the document. Therefore, there is no wasted operation or wasted operation time of the document table 3, and the time for one document processing cycle is shortened.

The original document table 3 whose forward movement a has been stopped is then switched to backward movement, and the exposed original document is also transported in the backward movement together with the backward movement document table 3 without being pressed by the conveying roller 56.

The number of copies preset here is 1 (single copy)
In this case, the scooping plunger 87 is turned on at the same time as the document table 3 starts to be driven back, and the scooping sheet 85 is turned on.
is converted and held in the second position shown by the two-dot chain line in FIG. 10, in which the leading end is in contact with the surface of the document table 3. As a result, the exposed original is deflected and guided from the surface of the document table 3 into the discharge sheet path 89 by the scooping sheet 85, and enters the sheet path 89 as the document table 3 moves backward a. The paper ejection roller 64 is rotationally driven in the paper ejection direction by the paper ejection drive and the transfer of the reroller 61 on the friction plate 62 as described above in conjunction with the backward movement of the document table 3. 8
The exposed original that has entered the inside of the paper ejecting tray 6 is further conveyed by the rotary ejecting roller 64, and until the document table 3 returns to its initial home position, it is placed on the ejecting tray 6 with the image side "-". is discharged. The jjy draft table 3 which has returned to its home position enters a standby state until the next original is set and the copy start button 93a is pressed.

Also, on the copying machine main body 1 side, the original is placed in the output tray 6 as shown above.
” - One copy cycle is completed until the ejection is completed.
The copy is delivered to the copy tray 21 with the image surface facing upward. In other words, both the original and its copy are on the image plane.
The sheets are discharged to the paper discharge tray 6 and the copy tray 21L, respectively, in the L direction.

Further, when the preset number of copies is a plurality of copies (multi-copy), the scooping plunger 87 is held in the off state even if the backward drive of the document table 3 is started. That is, the scooping sheet 85 continues to be held in the first attitude with its leading end separated from the document table 3. Therefore, in this case, when the document table 3 moves back, the document on the -L side is also conveyed together with the document table 3 to the gap 31 between the document table 3 and the pressure bonding sheet 30 of the document feeder 2. At 70, the document is pressed against the surface of the document table 3 and further conveyed together with the reciprocating document table 3. The document table 3 moves back to the initial home position and is stopped. Subsequently, the drive is again switched to forward drive a. Note that the distance between the conveyance roller 56 and the document holding roller 70 is shorter than the minimum length of the original document on the document table 3, so during the backward movement process of the document table 3, at least one roller is always pressed against the document table 3. Even when the document table 3 returns to the home position, the leading edge of the document remains at position R in FIG.
Since the document is pressed against the surface of the document table 3, the document does not slide and shift its position relative to the surface of the document table 3.

Then, as the document table 3 is driven forward again a, the document on top of it is also conveyed in the document forward direction together with the document table 3 and sequentially passes through the slint exposure section 8 to undergo the second exposure process. A second copy process is executed on the copying machine main body 1 side. The forward movement length of the first copying process is stored in the control circuit 100, and the movement of the document table 3 for the second and subsequent sheets is performed in the forward movement direction. From now on, the document table 3 will be used for the set number of copies.
By repeatedly performing the reciprocating movement, the document is repeatedly exposed to slint light, and a plurality of copies are sequentially discharged onto the copy tray 21 with the image surface facing upward.

Then, when the final forward movement a of the original platen 3 is completed and the original platen 3 is then turned to the backward movement, the scooping plunger 87 is turned on at the same time, and from then on, the same operation as in the case of the single copy described above is performed. The original is ejected onto the paper ejection tray 6 with the image side facing upward. The document table 3, which has finally returned to its home position, enters a standby state until the next document is set and the copy start button 93a is pressed. Further, the leaf spring 78 and the registration shutter 79 are returned to their initial first postures when the paper feed plunger 81 is turned off, and the scooping sheet 85 is also returned to the initial first posture when the scooping plunger 87 is turned off.

FIG. 16 is a block diagram showing a circuit for performing the above-mentioned operation, and shows a well-known one-chip microcomputer (hereinafter referred to as MC0M) 100 with built-in ROMΦRAM, etc.
The input boats Po to P4 of MC0M100 include the copy start button 93a described above,
Signals are input from the home position sensor 101 that detects whether the document table 3 of the copying machine is in a predetermined position, the 91 change micro switches 46S and 46B for the sheet/thick document, and the document detection sensor 83 in the document feeder z. be done.

Also, from output ports Fo-F3, dry/<D
, )-03, a forward drive mechanism 102 and a backward drive mechanism 103 drive the document table 3, which is a load, and a scoop plunger 87 and paper feed plunger 81 in the document feeder.
An output signal is output that causes the on-off operation.

Reading these input signals or turning on/off the load is done by M.
It is controlled according to a program stored in ROM in C0M100. That is, when the switching lever 38 is set to seat mode FS, the switch 463 is turned on (step 105 in FIG. 17A). When the sheet original O(S) is inserted along the tray 4 from the paper feed port 5 until the leading edge hits the shutter 79, the optical sensor 83 detects paper cloth (step 106). When the start button 93a is turned on to start the sheet mode copying operation (step 1o7), the action drive of the document table 3 is turned on and the paper feed plunger 81 is turned on (the shutter 79 is opened) (step 200 in FIG. 17B).

Step 201 = [Forward timer → start/end,
Document glass forward drive off.

Step 202 - [Setting number of copies] If -1sO, the scooping plunger 87 is turned off and the original platen back-drive drive is turned on.

Step 203 = home position detection, return drive off.

Step 204: [Set number of copies per copy] If -1=0, the scooping plunger 87 is turned off and the copying operation ends (END).

When copying multiple copies at once, the scooping plunger 87 is inactivated (remains off) in step 202, and the number of copies is one in step 204! 1; Return to step 200 with O, and the above number of sheets is O.
Repeat the operation until.

B. Thick Original Processing (Book Mode) (1) The paper discharge tray 6 is folded onto the paper feed tray 4 as shown by the two-dot chain line in FIG. Set the mode switching lever 38 to the book mode B position. As a result, as described above, the document feeder 2 is locked to the document table 3 side, and the document table 3 and the document feeder 2 become integrally capable of forward and backward movement.

Further, as shown in FIG. 6, the original pressing sheet 30 of the original feeding device M2 is brought into close contact with the upper surface of the original table 3. The fact that the microswitch 46B is turned on and the book mode is switched is input to the control circuit 100. Paper feed plunger 81
and scooping plunger 87 are always kept off in this mode.

(2) Move the document feeder 2 to the shaft 4 as shown by the two-dot chain line in Figure 6.
5 from the top of the document table 3 in the center, place the thick document 0 (B) to be copied on the specified position on the document table 3 with the image side to be copied facing downward, and then The opened device 2 is used as a document holder and is folded over as shown in FIG.

(3) Set various required copying conditions using the operation panel 93 of the copying machine main body 1, and then turn on the copy start button 93a.

(4) Then, the document table 3 will be placed on top of the thick document 0 (B
) and the document feeder are mounted, the forward movement a is started.

Due to the forward movement a of the document table 3, the downward image surface of the thick document, which is centered at -L, passes through the slit exposure section 8 sequentially from the leading edge to the trailing edge, and is exposed to the image of the document. Copying processing is executed by a copying mechanism within the copying machine main body l.

For example, when the document table 3 moves forward a distance corresponding to the copy paper size used, it changes to the backward movement and returns to the initial home position.In the case of single copying, it then enters a standby state, and in the case of multicopying, it changes the setting After the reciprocating drive is repeated a number of times corresponding to the number of copies, a standby state is entered.

[Brief explanation of drawings]

The drawings show an apparatus according to an embodiment of the present invention; FIG. 1 is an external perspective view, FIG. 2 is a longitudinal sectional front view including the main body of the copying machine, and FIG. 3 is a sectional view taken along the line ■-■ in FIG. Figure 4 is a sectional view of the engaging protrusion and the engaging recess, Figure 5 is a sectional view taken along the line v-v in Figure 1, Figure 6 is the same view when converted to book mode, Figure 7 is the thick Figure 8 is a plan view of the mode cut lever mechanism, Figure 9 is an enlarged side view of the trouble spring part, and Figure 1θ is the sheet document conveyance/sliding roller mechanism. The enlarged sectional view, Fig. 11, is Fig. 10
Figure 12 is a cross-sectional view of the line section in Figure 1O, Figure 13 is a rear view of the drive system, Figure 14 is a plan view of the original scooping sheet, and Figure 15 is a cross-sectional view of the line section in Figure 1O. Same sectional view, 1st
Figure 6 is a block diagram of the control circuit, and Figures 17A and 17B are its flowchart 1. 1 is the main unit, 2 is the document feeder, 3 is the reciprocating document table,
8 is a document reading position, and 38 is a sheet/bunk document feed switching lever.

Claims (1)

[Claims] (1) Consisting of a main unit that reads and processes documents, a document table that is placed on top of the main device and moves back and forth to convey documents to the reading position, and a document feeder that feeds thin documents toward the document table; In the case of feeding a thin document, a scooping means for scooping up the document whose image has been read when the document table is moved in a direction opposite to the direction in which the document table is moved during image reading from the document table is brought into contact with the document table; A unique document transport device that scoops up originals, inverts them, and outputs them with the image side facing upward.