JP3161452B2 - Automatic document feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading apparatus having a platen glass on the upper surface thereof, which is mounted on an upper surface of a document reading apparatus main body. The present invention relates to an automatic document feeder that automatically feeds a read scanned document to a document discharge tray.

[0002]

2. Description of the Related Art In recent years, as copying machines have become faster and more automated, an automatic document feeder has been used which automatically supplies a plurality of documents sequentially to a document reading position on the upper surface of a platen glass. This type of automatic document feeder is installed and used on the upper surface of a document reading device having a platen glass on the upper surface. The automatic document feeder has the following components (a) and (b). (a) A document setting section for setting a document to be read. (b) Document output tray from which scanned documents are output.

[0003]

In the document setting section of the conventional automatic document feeder, when the placed document is taken out for some reason or the position of the placed document is adjusted, the document setting section is used. Since the finger of the hand could not be inserted into the lower surface of the original placed on the original set, it was difficult to take out the original placed on the original set portion and adjust the position.

[0004] In view of the above circumstances, the present invention is directed to the following technical content. (O01) To facilitate handling operations such as taking out a document placed on the document setting section and adjusting the position.

[0005]

In order to solve the above-mentioned problems, an automatic document feeder according to the present invention has the following configuration. In the description of the present invention, in order to easily understand the correspondence with the components of the embodiments described later,
In the components of the present invention, the same reference numerals as those of the corresponding embodiments are described in parentheses. The reference numerals in parentheses attached to the components of the present invention are to be referred to in order to facilitate understanding of the present invention, and in order to interpret the present invention by limiting it to the embodiments. Should not be referenced.

(First Invention) In order to solve the above-mentioned problems, an automatic document feeder according to a first invention comprises a document set section (TR1) on which a document to be read is set, and a document discharge for discharging the read document. (TR
2) and a guide wall (23a) for positioning one side edge of the document
In the automatic document feeder provided with: a recess (11) for inserting a finger in a direction perpendicular to the document transport direction is formed in the document setting section (TR1); 11) is provided on the opposite side to the guide wall (23a) with respect to the set document, and is formed to extend in a direction perpendicular to the document conveying direction. (Second Invention) In the automatic document feeder according to the second invention, in the automatic document feeder according to the first invention, the concave portion (11) is located inside the document loading area and outside the document loading area of the document setting section (TR1). And is formed so that a finger of a hand can be inserted into a lower portion of a set document.

[0007]

(Operation of the First Invention) In the automatic document feeder of the present invention having the above-described configuration, a document (G) to be read is set in the document set section (TR1), and the read document is placed in the document discharge tray (TR). It is discharged to TR2). A recess (11) is formed in the document setting section (TR1). When performing a document handling operation such as taking out the document (G) placed on the document setting portion (TR1) or adjusting the position, the finger can be inserted into the concave portion (11) to facilitate the work. it can. The recess (11)
Is formed so as to extend in a direction perpendicular to the original moving direction, so that fingers of hands can be inserted into the concave portion (11) when handling various originals (G) having different original sizes. The concave portion (11) is provided on a side opposite to the guide wall (23a) with respect to the set document, and is formed to extend in a direction perpendicular to the document conveying direction, so that the guide wall (23a) is formed. The operation of pressing the original against the side can be easily performed.

[0008]

(Operation of the Second Invention) In the automatic document feeder according to the second invention having the above-mentioned configuration, the concave portion (11) is continuous with the inside of the document loading area of the document setting section (TR1) and outside the document loading area. It is formed so that the fingers of the hand can be inserted into the lower part of the set document, so that the fingers of the hand can be easily inserted into the concave portion (11). For this reason, the original setting section (TR1)
The document handling operation such as taking out the document (G) placed on the document and adjusting the position can be easily performed.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. In the drawing, the direction of arrow X1 indicates the normal transport direction of the document (that is, the front). FIG. 1 is an overall view of an embodiment of an automatic document feeder according to the present invention. 2 is an enlarged cross-sectional view of the automatic document feeder B shown in FIG. 1, FIG. 3 is a view as viewed from an arrow III in FIG. 2, and FIG.
FIG. 5 is an exploded perspective view of the frame of the automatic document feeder B, FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 2, and FIG. FIG. 6 is an explanatory diagram of a document registration sensor S3 and document size sensors S4 and S5.

In FIG. 1, an automatic document feeder B according to an embodiment of the present invention is provided on the upper surface of a platen glass A1 on the main body side of a copier main body A. The automatic document feeder B includes:
A document set portion TR1 on which documents G of various sizes to be copied are stacked, a document discharge tray TR2 from which the copied document G is discharged, and a document G set on the document set portion TR1. Take out the platen glass A1
Document transport means (H1 to H3) for transporting the document to the upper document copy position and transporting the copied document G copied at the document copy position to the document discharge tray TR2. The document setting section TR1, the document discharge tray TR2, and the document transporting means (H1 to H3) of the automatic document transporter B include:
It is supported by the frame F. This frame F
Are shown in FIGS.

2, 4 and 5, the frame F comprises a flat front frame F1, a rear frame F2, and a pair of tie plates F3 and F3 connecting the frames F1 and F2. At the lower end of the front frame F1, a frame front end contact member 1 is provided. The frame front end contact member 1 is in contact with the upper surface of the copying machine main body A to maintain the position (height) of the front end of the frame F with respect to the upper surface of the copying machine main body A at a predetermined value. A similar frame base end contact member 2 is also provided at the lower end of the rear frame F2. The tie plate F3 includes a horizontal upper wall 3 and a pair of side walls 4 and 4, and has a substantially inverted U-shaped cross section. As shown in FIG. 5, hinge pin insertion holes 4a are formed in an intermediate portion of the tie plate F3. An opening 5 is formed in the rear frame F2 at a connection portion with the tie plate F3, and a tip side portion of a rotating arm 6 having a substantially U-shaped cross section is inserted into the tie plate F3 from the opening 5. It is configured to be.

Hinge pin insertion holes 6a, 6a are formed at the distal end of the rotation arm 6, and the rotation shaft insertion hole 6a is formed at the base end.
b, 6b are formed. A turning shaft 7 (see FIG. 4) is inserted and fixed in the turning shaft insertion holes 6b, 6b of the turning arm 6, and the turning shaft 7 is supported on a support bracket fixed to the upper surface of the copying machine main body A. 8 rotatably supported. The hinge pin insertion holes 6a, 6a at the tip of the rotating arm 6 and the hinge pin insertion holes 4 of the tie plate F3
a and 4a (see FIG. 5) are connected by hinge pins, that is, hinge connecting members 9 (see FIGS. 2, 4, and 5).

Therefore, the rotating arm 6 and the frame F are connected by the hinge connecting member 9 so as to be relatively rotatable. The frame supporting means U is constituted by the components indicated by the reference numerals 6 to 9 and the like. In the state shown in FIG. 4, the frame front end contact member 1 and the frame base end contact member 2 contact the upper surface of the copying machine main body A, and the position (height) of the frame F with respect to the upper surface of the platen glass A1. Is held at a predetermined position. Holding the frame F at the predetermined position in this manner requires the document G
Is required to be pressed against the platen glass A1 at a predetermined pressure.

The relative amount of rotation between the rotating arm 6 and the frame F is restricted for the following reason. That is, when the front frame F1 is lifted from the state shown in FIG.
Relative to the hinge connecting member 9 in the clockwise direction. At the time of the relative rotation, when the upper edge of the turning arm 6 abuts on the base end (the right end in FIG. 4) 3a of the upper wall 3 of the frame F, the frame F and the turning arm 6 are further moved. No relative rotation is performed. When the frame F rotates counterclockwise relative to the pivot arm 6 about the hinge connection member 9, the tip (the left end in FIG. 4) 6c of the upper edge of the pivot arm 6 is When the frame F comes into contact with the upper wall 3, no further relative rotation between the frame F and the rotating arm 6 is performed. In this way, the amount of relative rotation between the frame F and the rotating arm 6 is restricted. Accordingly, the base end (the right end in FIG. 4) 3a of the upper wall 3 of the frame F and the rotating arm 6 which comes into contact with the base end 3a
The upper edge of the rotating arm 6, the tip (left end in FIG. 4) 6c of the upper edge of the rotating arm 6, and the upper wall 3 of the frame F that abuts on the upper edge 3 make the rotatable amount restricting means R of this embodiment. It is configured. The rotatable amount restricting means R is disposed between the frame F and the rotating arm 6 to restrict a relative rotatable amount around the hinge connecting member 9.

The frame F includes various other components of the automatic document feeder, for example, a front cover K1, a main cover K2, a rear cover K3, and a document feeder H shown in FIG. ) Etc. are supported.

Referring to FIGS. 2, 3, 4, 6, and 7, the main cover K2 is provided with a document set portion TR1 on which a document G for copying is placed.
A concave portion 11 into which a finger of a hand is inserted when handling the placed document G is formed in R1. As can be seen from FIG. 3, the originals G are aligned at a position biased toward the rear cover K3.
That is, the rear edge of the document G is aligned with the wall (guide wall) vertically rising from the rear edge of the document setting section TR1 shown in FIG. The concave portion 11 is formed so as to extend in a direction orthogonal to the original moving direction, and is formed separately in an area (sheet mounting area) of the original setting portion TR1 where the paper is mounted. However, it is formed so as to exist continuously.
The main cover K2 supports the document discharge tray TR2 rotatably between a document storage position (position indicated by a solid line in FIG. 2) P1 and a standing position (position indicated by a two-dot chain line in FIG. 2) P2. Bearing holes 13 and 13 (see FIGS. 3 and 6) are provided. The document discharge tray TR2 moves between the tray body 14 and a storage position (a solid line position in FIGS. 2 and 3) and a protruding position (a two-dot chain line position in FIGS. 2 and 3) at the tip of the tray body 14. An auxiliary tray 15 is provided which is supported as possible. The auxiliary tray 15 is used by being moved to the protruding position when the shape of the document G to be discharged is large (long).

The tray body 14 has projecting shafts 14a, 14a inserted into the bearing holes 13, 13 at its base end.
And a pair of legs 14b, 14b (see FIG. 6) abutting on the upper surface of the main cover K2 at the document storage position (P1). The pair of legs 14b, 14b constitute a document storage position holding unit of this embodiment. The bearing holes 13 and 13 and the projecting shafts 14a and 14a inserted therein constitute tray supporting means Ts (see FIGS. 3 and 6) for rotatably supporting the document discharge tray.

In the bearing holes 13 provided in the main cover K2, projecting shafts 14a of the tray body 14 are provided.
In order to insert the bearing hole 14a, the tray body 14 is bent so that the interval between the protruding shafts 14a, 14a is reduced, and the bearing hole 1a is inserted.
It is assumed that the distance between the gaps 3 and 13 is narrower. In this state, the projecting shaft 14 is inserted between the bearing holes 13, 13.
a and 14a are arranged, and the tray body is released from the curved posture to be in a flat state. Then, the protruding shafts 14a of the tray body 14 are inserted into the bearing holes 13 provided in the main cover K2.

A pair of magnets 16 are fixed to the tray body 14 on the upper surface of the base end. Those magnets 1
When the document discharge tray TR2 is at the upright position, it is attracted to the pair of magnetic plates 17 fixed to the main cover K2 to act to hold the document discharge tray TR2 at the upright position. Therefore, the magnet 16 and the magnetic sheet metal 17 constitute the standing position holding means of this embodiment.

Next, the original loading device H1 for transporting the original G placed on the original setting section TR1 to an original standby position set a predetermined distance before the original copying position on the platen glass A1, A document conveying device H that conveys the document G at the standby position to the document copying position on the platen glass A1, and further conveys the copied document G to the document discharge side.
2, and a document discharge device H3 for discharging the copied document G transported from the document transport device H2 to the document discharge tray TR2. In FIG. 2, the document carrying device H1 has a first transport path 21 connected to the document setting unit TR1. The first conveyance path 21 is provided with a document presence / absence sensor S1 for detecting the presence / absence of the document G placed on the document setting section TR1 and a nager roll 22 for sequentially taking out the document G. This Naja Roll 22
Is a nadger roll home sensor S for detecting its posture.
2 and is held in a predetermined posture when not operating. The first transport path 21 and the second transport path connected thereto
A separating roll device 24 is provided between the transfer roller 23 and the conveying path 23. The separation transport roll device 24 includes a drive roll 24
a and a non-rotatable retard roll 24b, and the first transport path 2
It has a function of taking out the originals G conveyed 1 and transporting them one by one in the second conveyance path 23.

FIG. 7 is an explanatory view of the inside of the second transport path 23. In FIG. 7, reference numeral 23a denotes a guide wall for positioning and guiding one side edge of the document G conveyed on the second conveyance path 23, and a straight line indicated by reference numeral 26 indicates a position of the registration roll device 26 described later. (Hereinafter, this position is referred to as a “pre-registration position”). As shown in FIG.
An original registration sensor S3, a first size sensor S4 for detecting the size of the original G, and a second size sensor S5 is provided.
The document registration sensor S3 is also used as a rear end passage detection sensor of the present invention. Since the distance between the registration roll device 26 and the document registration sensor S3 is fixed as described above, when the document G is conveyed a predetermined distance after the document registration sensor S3 detects the front end of the conveyed document G, the document G The front end reaches the position of the registration roll device 26, that is, the pre-registration position.
Usually, the original G currently being copied is a platen glass A1.
The original G to be copied next, which is held at the upper original copy position, stops at the pre-registration position and waits. Hereinafter, the position of the original G where the front end of the original G is stopped at the pre-registration position is also referred to as an original standby position.

The document registration sensor S3 is disposed at a position Lo away from the guide wall 23a. Further, the first size sensor S4 is located at a distance L from the guide wall 23a.
The third size sensor S5 is disposed at a distance LB from the guide wall 23a. The guide wall 23 of the second transport path 23
The document G conveyed while being guided on one side edge by a can detect the width size of the document G by detecting the other side edge. For example, a document G having a width of LA or less is a small size width, and a document G having a width exceeding LA and being equal to or less than LB.
If the original G having a medium width and a width exceeding LB is a large original, the width of the original G can be detected from a combination of the detection signals of the size sensors S4 and S5.

The size of the original G in the length direction is determined from the transport amount of the original G from when the original registration sensor S3 detects the front end of the original G to when the rear end is detected. . In the copying machine main body A, a copy sheet corresponding to the detected size of the document G is taken out of the copy sheet tray and copying is performed. The document loading device H1 is composed of elements indicated by the reference numerals 21 to 24 and the like.

The document feeder H2 is connected to the second feed path 23
The third transport path 25 connected to the
A registration roll device 26 is provided between the rollers 25.
The registration roll device 26 has a drive roll 26a and a pinch roll 26b.
Thus, the document G conveyed through the second conveyance path 23 is conveyed in the third conveyance path 25. The surface of each of the rolls 26a and 26b forms a frictional contact surface with the original G to be conveyed.
When the drive roll 26a rotates while the original G is supplied between the frictional contact surfaces, the original G is transported in the moving direction of the frictional contact surface. The drive roll 2
Conventionally, the axis connecting line 26c connecting the axis of 6a and the axis of the pinch roll 26b is installed so as to be parallel to the upper surface of the platen glass A1, but in the present embodiment, it is installed obliquely to the upper surface of the platen glass A1. Have been. As described above, the position of the registration roll device 26 (that is, the pre-registration position) is arranged as close as possible to a platen registration position described later by inclining the axis connection line 26c.

The third transport path 2 of the document transport device H2
Below shaft 5, a shaft 28 is provided by a solenoid (not shown).
A document registration gate 28 that is controlled to rotate around a is provided. The document registration gate 28 is normally held in the state shown in FIG. 2, but is rotated downward from the state shown in FIG. 2 when the document G is reversed to perform double-sided copying. The fourth transport path 31 connected to the third transport path 25 is formed by an upper surface of the platen glass A1 and a transport belt 32 disposed in contact with the upper surface. A platen registration position is set in the fourth conveyance path 31. The platen registration position is a position where the rear end of the original G is arranged when the original G is conveyed to the copy position on the platen glass A1, that is, the original reading start position. Is disposed. Hereinafter, the position of the original G where the rear end of the original G is stopped at the platen registration position is referred to as an original copy position.

To place the original G at the original copy position, the original G is conveyed by a predetermined amount from the original standby position. In this embodiment, as described above, the position of the registration roll device 26 (that is, the pre-registration position and the position for determining the document standby position) is made as close as possible to the platen registration position by inclining the axis connection line 26c. Therefore, the distance between the document standby position and the document copy position is set to be extremely short.

The transport belt 32 is an endless belt wound around a belt drive roll 33 and a free roll 34. The belt drive roll 33 and the free roll 34
A plurality of pressure rolls 35 are disposed between the pressure rollers.
These pressure rolls 35 press the conveyor belt 32 against the upper surface of the platen glass A1 with a predetermined pressure.
The document conveying device H2 is constituted by the components indicated by the reference numerals 25 to 35 and the like.

A document discharging device H3 is provided in the fourth conveying path 31.
The fifth transport path 36 is connected. This fifth transport path 3
A discharge-side transport roll device 38 is provided between the sixth transport path 6 and a sixth transport path 37 connected thereto. The discharge-side transport roll device 38 has a drive roll 38a and a pinch roll 38b, and transfers the document G transported along the fifth transport path 36 by the transport belt 32 to the sixth transport path 3
7 has a role of transporting the sheet.

A document discharge sensor S6 for controlling the discharge of the document G is provided in the middle of the sixth transport path 37.
A discharge roll device 39 is provided at the end of the sixth transport path 37. The discharge roll device 39 includes a drive roll 39
a and a pinch roll 39b, and has a role of discharging the document G transported through the sixth transport path 36 by the discharge-side transport roll device 38 to the discharge tray TR2. The document discharge device H3 is composed of the components indicated by the reference numerals 36 to 39 and the like.

As shown in FIG. 2, the automatic document feeder B includes a double-sided copy transport path 40 used for performing double-sided copy and a double-sided copy transport path disposed along the double-sided copy transport path 40. Transport roll devices 41 and 42 are provided. The document conveying means H includes a manual document insertion slot 43 and a manual document conveyance path 44 connecting the manual document insertion port 43 and the second conveyance path 23. The manual document feed path 44 is provided with a manual document feed roll device 45, a manual document sensor S7, and the like.

Next, the copying machine main body A will be described with reference to FIG. Below the transparent platen glass A1 on the upper surface of the copying machine main body A, the platen registration sensor Sg and the exposure optical system 50 are arranged at the platen registration position. The exposure optical system 50 has a movable lamp unit 51, and the lamp unit 51 is configured by integrating a lamp 52 for document illumination and a first mirror 53. Further, the exposure optical system 50 has a movable mirror unit 54 that moves at half the speed of the lamp unit 51. This moving mirror unit 54
Is composed of a second mirror 55 and a third mirror 56. The exposure optical system 50 also has a lens 57, a fourth mirror 58, a fifth mirror 59, a sixth mirror 60, and the like. Then, when the lamp unit 51 moves in the left-right direction in FIG. 1 in parallel with the document, and the moving mirror unit 54 moves at a speed half the moving speed of the lamp unit 51 and a half distance. , Manuscript G
Since the distance between the lens and the lens 57 is kept constant, the reflected light of the original G illuminated by the lamp 52 is converged on the photosensitive drum 61 through the exposure optical system 50 during that time. It is configured. Around the photosensitive drum 61, a charging charger 62, a developing unit 63, a transfer charger 64, a cleaner unit 65, and the like are arranged along the rotation direction of the photosensitive drum 61.

The copying machine main body A has a first tray 66, a second tray 67, and a third tray 68 for sequentially storing transfer paper, and a temporary stock used for double-sided copying. A fourth tray 69 and a fifth tray 70 for storing a large number of sheets are stored. A first feed roll 661, a first separating roll device 662, and a first feed roll device 663 are provided corresponding to the first tray 66, and a first feed roll device 663 is provided in front of the first feed roll device 663. A sensor S11 is provided. , A separation roll device 672,..., A feed roll device 673,..., A feed sensor S12,.
And so on. The delivery rolls 661 and 67
, And the separating roll devices 662, 672,... Constitute a sheet feeding device H4, and the feed roll devices 663, 673,.

The copy sheet sent from each of the trays 66 to 70 is detected by the first feed sensor S11 and the sheet registration sensor S10, etc., and is brought into contact with the sheet registration gate 71 and temporarily stopped. The position of the copy sheet once stopped in contact with the sheet register gate 71 is hereinafter referred to as a sheet standby position. When the copy sheet at the sheet standby position abuts on the sheet registration gate 71, the tip is curved and rounded. The paper registration gate 71 is disposed close to the paper registration roll device 72. When the paper register gate 71 is retracted from the paper path by a solenoid (not shown), the curled leading edge of the copy paper is extended to abut on the paper registration roll device 72.
When the paper registration roll device 72 is operated with the copy paper in contact with the paper registration roll device 72, the copy paper is transferred to the transfer position (the photosensitive drum 61 and the transfer charger 6).
4).

In the copying machine main body A, a transfer mechanism 73 for transferring the copy paper (transfer end paper) between the photosensitive drum 61 and the transfer charger 64, that is, the copy sheet (transfer end paper), is separated from the photosensitive drum 61 and transported. Are also provided.
The transfer end paper conveyed by the conveyance mechanism 73 is fixed by the fixing unit 74 and is discharged to the paper discharge tray 75.

Next, the operation of the embodiment of the automatic document feeder of the present invention having the above-described configuration will be described. In the automatic document feeder B, the frame F is rotatably connected to a distal end portion of a turning arm 6 rotatably supported by the copying machine main body A. Therefore, when the automatic document feeder is at the copying position (the position shown in FIG. 4), the frame F
Rotates around the hinge connecting member 9 at the distal end portion of the rotating arm 6, and abuts the frame distal end contact member 1 and the rear frame F2 (frame F2) at the lower end of the front frame F1 (the lower end of the frame F). The lower end of the frame (the lower end of the frame) abuts against the upper surface of the copying machine main body. For this reason, the positioning of the front end portion and the base end portion of the frame F in the height direction with respect to the upper surface of the platen glass A1 can be easily performed. Thus, the platen glass A
When the positioning of the frame F with respect to the upper surface in the height direction is performed, the positioning of the document conveying means H supported by the frame F in the height direction with respect to the upper surface of the platen glass A1 is also performed at the same time.

When the height of the document conveying means H held by the frame F with respect to the upper surface of the platen glass A1 is determined as described above, the distance between the conveying belt 32 of the document conveying means H and the upper surface of the platen glass A1 is determined. By the way, the pressing force acting on the original G conveyed to the original copy position on the upper surface of the platen glass A1 by the original conveying means H and pressed against the upper surface of the platen glass A1 by the conveying belt 32 is the conveying belt 32 of the original conveying means H.
Of the platen glass A1 with respect to the upper surface. Therefore, by mounting the document conveying means H at a predetermined height with respect to the frame F,
The pressing force for pressing the document G against the upper surface of the platen glass A1 by the transport belt 32 can be easily set to an appropriate value.

The frame F and the rotating arm 6
The relative rotatable amount is determined by the rotatable amount restricting means R.
Regulated by Therefore, the frame F
When the frame F is rotated between an open position away from the platen glass A1 and a copy position close to the platen glass A1, the frame F rotates around the hinge connection member 9 with respect to the rotation arm 6. In this case, the rotation is relatively controlled by the amount controlled by the rotatable amount control means R, but no further relative rotation occurs. Therefore, when the frame F is to be further rotated, the frame F is rotated about the base end portion of the rotation arm 6 as a rotation center.
And rotate with it. Therefore, the frame F can be easily rotated between the open position away from the platen glass A1 and the copy position close to the platen glass A1.

Since the document set portion TR1 is formed with the concave portion 11 into which a finger is inserted when handling the document G placed on the document set portion TR1, the document G placed on the document set portion TR1 is When a document handling operation such as taking out or adjusting a position is performed, the operation can be easily performed by inserting a finger into the concave portion 11. The recess 11
Are formed so as to extend in a direction orthogonal to the original moving direction, so that fingers of hands can be inserted into the concave portion 11 when handling various originals G having different original sizes. Further, since the concave portion 11 is continuously present in the paper setting area of the document setting portion TR1 when setting the paper, a finger is inserted into the concave portion 11 with the document G placed on the document setting portion TR1. Work such as aligning the ends of the document G can be performed.

When using the automatic document feeder B of the present embodiment, when the document G is set, the document discharge tray TR2 is rotated to a standing position P2 which is separated from above the document setting section TR1. In this state, there is nothing obstructing the document setting operation above the document setting portion TR1, so that the document setting operation can be performed easily. After the document G is set in the document setting section TR1, the document discharge tray T
R2 is rotated from the standing position P2 to the document storage position P1. When the copying operation is performed in this state, a large number of documents G placed on the document setting section TR1 are automatically copied. When the copying operation is completed, the document discharge tray T
The copied original G is placed on R2. Since there is no obstacle above the document discharge tray TR2,
The document G placed on the document discharge tray TR2 can be easily taken out.

Although the embodiment of the automatic document feeder according to the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, but deviates from the present invention described in the appended claims. In addition, various small design changes can be made.

[0042]

The automatic document feeder according to the first and second aspects of the present invention and the automatic document feeder of the image forming apparatus according to the second aspect of the present invention are provided for handling originals such as taking out originals placed on an original set portion and adjusting the position. When performing the work, the work can be easily performed by putting a finger of the hand into the concave portion.

[Brief description of the drawings]

FIG. 1 is an overall view of an embodiment of an automatic document feeder according to the present invention.

FIG. 2 is a front sectional view of the automatic document feeder B shown in FIG.

FIG. 3 is a view as viewed from an arrow III in FIG. 2;

FIG. 4 is a side sectional view of the automatic document feeder B taken along the line IV-IV of FIG. 2;

FIG. 5 is an exploded perspective view of a frame of the automatic document feeder B.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 2;

FIG. 7 shows a document registration sensor S3 and a document size sensor S4 arranged in a document conveyance path of the automatic document conveyance device B;
It is explanatory drawing of S5.

[Explanation of symbols]

A: Copying machine body, A1: Platen glass, B: Automatic document feeder for copying machine, C: Controller, F: Frame, F1: Front frame, F2: Rear frame, F3
… Type plate, G… Document, H1… Document loading device, H2…
Document conveying device, H3: Document discharging device, K1: Front cover, K2: Main cover, K3: Rear cover, P1: Document storage position, P2: Standing position, R: Rotation amount control means,
S1: Document presence sensor, S2: Nadger roll home sensor, S3: Document registration sensor, S4: First size sensor, S
5: second size sensor, S6: original discharge sensor, S7: manual feed sensor, Sg: platen registration sensor, S10: paper registration sensor, S11: first feed sensor, S12: second
Feed sensor, TR1: Document setting section, TR2: Document discharge tray, Ts: Tray support means, U: Frame support means, 1 ... Frame tip end contact member, 2 ... Frame base end contact member, 3 ... Upper wall 4, side wall, 4a hinge pin insertion hole, 5 opening, 6 rotating arm, 6a hinge pin insertion port, 6b rotating shaft insertion port, 6c upper end tip, 7 rotating shaft,
Reference numeral 8: support bracket, 9: hinge connecting member, 11: recess, 13: bearing hole, 14: tray body, 14a: projecting shaft, 14b: leg, 15: auxiliary tray, 16: magnet, 1
Reference numeral 7: magnetic sheet metal, 21: first transport path, 22: nager roll, 23: second transport path, 23a: guide wall, 24: separating roll device, 24a: drive roll, 24b: retard roll, 25: third Conveyance path, 26 ... Register roll device, 26
a: drive roll, 26b: pinch roll, 26c: shaft center connection line, 28: document registration gate, 28a: shaft, 31: fourth
Transport path, 32: transport belt, 33: belt drive roll,
34: free roll, 35: pressure roll, 36: fifth transport path, 37: sixth transport path, 38: discharge side transport roll device,
38a: drive roll, 38b: pinch roll, 39: discharge roll device, 39a: drive roll, 39b: pinch roll, 40: double-sided copy transport path, 41: double-sided copy transport roll device, 42: double-sided copy transport roll Reference numeral 43 denotes a manual document insertion slot, 44 denotes a manual document transport path, 45 denotes a manual document transport roll device, 50 denotes an exposure optical system, 51 denotes a lamp unit, 52 denotes a document illumination lamp, and 53 denotes a first mirror and 54. ... moving mirror unit, 55 ... second mirror,
56: third mirror, 57: lens, 58: fourth mirror,
59: fifth mirror, 60: sixth mirror, 61: photosensitive drum, 62: charging charger, 63: developing unit, 6
4: Transfer charger, 65: Cleaner unit, 66
.., A first tray accommodating transfer paper, 661, a first delivery roll, 662, a first separating roll device, 663, a first feed roll device, 67, a second tray, 671, a second delivery roll, 672, a second Jaw roll device, 6
73: second feed roll device, 68: third tray, 6
9: Fourth tray for temporary stock used for duplex copying, etc., 70: Fifth tray for storing a large amount of paper, 71: Paper registration gate, 72: Paper registration roll device, 73: Transport mechanism, 74: Fixing unit, 75 … Paper discharge tray.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G03G 15/00 107 G03B 27/62-27/64 B65H 1/00-3/64

Claims (2)

(57) [Claims] 1. An automatic document feeder, comprising: a document set portion on which a document to be read is set; a document discharge portion for discharging a read document; and a guide wall for positioning one side edge of the document. A concave portion for inserting a finger in a direction perpendicular to the document conveying direction is formed in the document setting portion, and the concave portion is provided on a side opposite to the guide wall with respect to the set document. And an automatic document feeder formed so as to extend in a direction perpendicular to the document feed direction. 2. The image forming apparatus according to claim 1, wherein the concave portion is continuously formed inside and outside the document stacking area of the document setting section, and is formed so that a finger of a hand can be inserted into a lower portion of the set document. The automatic document feeder according to claim 1, wherein: