JPH0614207B2 - Document feeder and ejector for copier - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document feeding and discharging device for a copying machine, and more particularly to a transparent plate provided on the upper surface of a copying machine housing for a document to be copied. The present invention relates to a document feeding and discharging device that feeds the document to a transparent plate and further discharges the document from the transparent plate.

[Prior art]

Japanese Utility Model Publication No. 53-47961 discloses a typical example of a document feeding and discharging device for a copying machine. The document feeding / discharging device includes a document transport path and a document transport mechanism for transporting a document through the document transport path.
The document conveying path has a main portion extending on a transparent plate disposed on the upper surface of the copying machine housing, an introducing portion located upstream of the main portion, and a lead-out portion located downstream of the main portion. The document transport mechanism includes at least one endless transport belt having an operation traveling portion that passes through at least a main portion of the document transport path. In order to ensure that the document is fed to the required position on the transparent plate with sufficient accuracy, the blocking position and the document transport path that project to the required site near the downstream end of the main part of the document transport path and prevent the document from advancing Conveniently, there is also provided a document position restricting member which is selectively positioned at a non-blocking position which allows the document to move forward by retreating from the vicinity of the downstream end of the main part.

When feeding the original to be copied onto the transparent plate, the original position regulating member is positioned at a blocking position for preventing the original from advancing at a required portion, and the original feeding mechanism moves the main portion from the introduction portion of the original feeding path. The leading edge of the document conveyed through the abutment is brought into contact with the document position regulating member at the blocking position, and thus the document is positioned at the required position on the transparent plate sufficiently accurately. When a document is discharged from the transparent plate, the document position regulating member is positioned at a non-blocking position that allows the document to move, and the document transport mechanism discharges the document from the main portion of the document transport path through the lead-out portion.

[Problems of conventional technology]

Thus, in the document feeding and discharging device of the above-described form, when the document is fed onto the transparent plate to bring the leading edge of the document into contact with the document position restricting member at the blocking position, the document is conveyed. It is important that a relatively small conveying force is transmitted to the original from the endless conveying belt of the mechanism. When an excessive conveyance force is transmitted from the endless conveyance belt to the document, the document is advanced even after the leading edge of the document is brought into contact with the document position regulating member, which causes wrinkles on the document. Problems may occur. On the other hand, when the document is discharged from the transparent plate, a relatively large conveying force is transmitted from the endless conveying belt to the document in order to surely discharge the document through the lead-out portion which is often curved. It is important to do so. However, the conventional document feeding and discharging device cannot satisfy both of these conflicting requirements.

[Problems of the Invention]

The present invention has been made in view of the above facts, and its main technical problem is that when an original is fed onto a transparent plate, a relatively small conveying force is transmitted from the endless conveying belt to the original, and the transparent plate is It is an object of the present invention to provide an improved document feeding and discharging device in which a relatively large conveying force is transmitted from an endless conveying belt to a document when the document is discharged from above.

[Means for Solving the Invention]

The essence of the solution means of the present invention for solving the above technical problem is to press the back surface of the endless conveyance belt at the upstream side of the position where the document position regulating member in the main portion of the document conveyance path prevents the document from advancing. A pressing roller is movably provided between an operating position where the surface of the endless conveyor belt is brought into contact with or close to the transparent plate and a non-operating position where the pressing of the endless conveyor belt is released, and an original is fed onto the transparent plate. When the document position restricting member is positioned at the blocking position to move the pressing roller to the non-acting position, when the document position restricting member is positioned at the blocking position to eject the document from the transparent plate, the pressing roller moves to the acting position. It is to be positioned in.

That is, according to the present invention, the main portion extending on the transparent plate disposed on the upper surface of the copying machine housing, the introduction portion located upstream of the main portion, and the lead portion located downstream of the main portion. And a document transport mechanism for transporting a document through the document transport path including at least one endless transport belt having an operation traveling portion that passes through at least the main part of the document transport path. In a document feeding and discharging device for a copying machine, a blocking position that projects near the downstream end of the main part of the document transport path and blocks the progress of the document and a document that retreats from near the downstream end of the main part A document position restricting member selectively positioned at a non-blocking position allowing the advancing of the document, and the endless conveyance on the upstream side of the position where the document position restricting member in the main portion of the document conveying path prevents the document from advancing. Press the back of the belt A pressing roller movably arranged between an operating position where the surface of the endless conveyor belt is brought into contact with or close to the transparent plate and a non-operating position where the pressing of the endless conveyor belt is released, and the document position regulation When the member and the pressing roller are mounted and the document position restricting member is positioned at the blocking position, the pressing roller is positioned at the non-acting position, and when the document position restricting member is positioned at the non-blocking position, the pressing roller operates. A copying machine, comprising: an operating means for operating the operating means, a driving means for driving the operating means, and a control means for controlling the document conveying mechanism and the driving means. A document feeding and discharging device is provided.

[Operation of the invention]

In the document feeding / discharging device of the present invention, the pressure roller is positioned at the non-acting position when feeding the document on the transparent plate, and therefore, no pressing action is applied to the endless transport belt, and therefore the endless transport is performed. The conveyance force transmitted from the belt to the original is comparatively small, and when the front edge of the original is brought into contact with the original position regulating member at the blocking position, the movement of the original is stopped without causing wrinkles or the like on the original. On the other hand, when the document is ejected from the transparent plate, the pressing roller is positioned at the working position, and therefore the endless transport belt is pressed, so that the transport force transmitted from the endless transport belt to the document is relatively large. Even if the lead-out portion is curved, the document is ejected with sufficient certainty.

[Preferred specific examples of the invention]

Hereinafter, a more detailed description will be given with reference to the accompanying drawings illustrating an electrostatic copying machine including a specific example of a document feeding and discharging apparatus configured according to the present invention.

Referring to FIGS. 1 and 2, a document feeding and discharging device generally designated by the numeral 4 is provided on the upper surface of the copying machine housing 2 of the electrostatic copying machine which may be of a known form per se. In addition, in the illustrated embodiment, the document holding mechanism 6 which is of a known form per se is provided.

The document feeding and discharging device 4 in the illustrated example is a transparent plate 8 (FIG. 3) provided on the upper surface of the copying machine housing 2.
Of the stationary support frame 10 mounted on the upper surface of the copying machine housing 2 adjacent to one side edge of the copying machine housing 2 and an operating position (that is, a first position) for covering the transparent plate 8 about an axis extending along the one side edge of the transparent plate 8. 1) and a non-acting position that exposes the transparent plate 8 (for example, the second position swiveled clockwise by 90 degrees when viewed from the lower right in FIGS. 1 and 2 from the above acting position).
(A position shown in the drawing) and a movable main frame 12 mounted so as to be rotatable. On the other hand, the document pressing mechanism 6 has an axis extending along the other side edge of the transparent plate 8 which extends substantially at right angles to the central axis of rotation of the main frame 12 at the document feeding and discharging position 4. Centered on the position where the transparent plate 8 is covered (i.e., the position shown in FIG. 2) and the non-working position where the transparent plate 8 is exposed (for example, from the above-mentioned position, when viewed from the upper right in FIGS. 1 and 2). It is mounted so as to be freely rotatable between a 90 ° -turned position (shown in FIG. 1). Then, as will be described in detail later, when the document to be copied is positioned on the transparent plate 8 by using the document feeding and discharging device 4, as shown in FIG. Original feeding and discharging device 4
The main frame body 12 is positioned at the working position. On the other hand, when the original to be copied is positioned on the transparent plate 8 by manual operation without using the original feeding and discharging device 4, the original to be copied is thick such as a book or relatively thick such as a thick paper or a metal plate. 2), the main frame 12 of the document feeding / discharging device 4 is set to the non-acting position, and then the document is placed at a desired position on the transparent plate 8 as shown in FIG. The original holding mechanism 6 is placed on the transparent plate 8 and the original holding mechanism 6 covers the transparent plate 8 and the original placed thereon. When the original is taken out after the copying process is completed, the original pressing mechanism 6 is rotated to the non-acting position.

Hereinafter, the configuration of the illustrated document feeding and discharging device 4 configured according to the present invention will be described in detail.

Referring to FIG. 3 together with FIGS. 1 and 2,
The document feeding and discharging device 4 shown in the drawing is, as already mentioned,
The stationary support frame 10 and the movable main frame 12 are provided. As can be seen from FIG. 3, the support frame 10 is adjacent to one side edge of the transparent plate 8 fixed to the upper surface of the copying machine housing 2, and one end portion of the upper surface of the copying machine housing 2 (in FIG. 3). It is attached to the right end). And the main frame 12
Are rotatably mounted on the support frame 10. The mounting method of the main frame 12 with respect to the support frame 10 will be described with reference to FIGS. 4 to 6 together with FIG. 3. The support frame 10 has a width direction (that is, a direction perpendicular to the paper surface in FIG. 3). A pair of upright walls 14a located at a predetermined distance from each other
And 14b, and such a pair of upright walls 14a and 14
A main shaft 18 is rotatably mounted between bearings b by bearing members 16a and 16b. On the other hand, the main frame 12 has a pair of side plates 20a and 20a which are located at a predetermined interval in the width direction.
b, one end portion of the pair of side plates 20a and 20b is pivotally connected to the main shaft 18 via the bearing members 16a and 16b, and thus the main frame body 12 extends along one side edge of the transparent plate 8. It is mounted on the support frame 10 so as to be rotatable about the central axis of the main shaft 18 extending in the vertical direction. The main frame 12 is disposed between the pair of upright walls 14a and 14b of the support frame 10 and each of the pair of side plates 20a and 20b of the main frame 12 at the working position (that is, the first position). (The position shown in the figure) and the non-acting position (that is, the position shown in FIG. 2) for forcibly positioning and holding,
The following mechanism is interposed. Mainly 4th
Explaining with reference to the drawings, a short shaft portion 22 protruding laterally outward is formed on the outer surface of each of the pair of upright walls 14a and 14b of the support frame body 10. One end of a connecting arm 24 is rotatably connected to each. On the other hand, the pair of side plates 20a and 2 of the main frame 12
A pair of brackets 26 and 28 are fixed to the outer surface of each 0b at intervals in the longitudinal direction, and a rod 30 extending between the brackets 26 and 28 is attached to the brackets 26 and 28. This rod 30 is, for example, a bracket 26.
By screwing the nut 32 into male threads formed on both ends of the holes extending through the holes 28 and 28,
Brackets 26 and 28 can be mounted as desired. If desired, one of the two nuts 32 can be integrally formed with the rod 30. A block 34 is slidably mounted on the rod 30, and a coil spring 36 is interposed between the block 34 and the bracket 26. On the other hand, a pin 38 projecting laterally outward is planted at each free end of the above-mentioned connecting arm 24, and the pin 38 is inserted into a corresponding recess formed in the block 34. The free end of the connecting arm 24 is pivotally connected to the block 34. A pair of upright walls 14a and 14 of the support frame 10
b and each of the pair of side plates 20a and 20b of the main frame 12 in the above-mentioned mechanism, the main frame 12 is shown in a solid line in FIG. When pivoted to the non-acting position shown by, the free end portion of the connecting arm 24 receives the pair of side plates 20a and 20b of the main frame 12 via the pin 38, the block 34, and the rod 30.
Therefore, the connecting arm 24 is also swung between the position shown by the solid line and the position shown by the chain double-dashed line in FIG. Thus, the pair of side plates 20a and 20 of the main frame 12
b rotates about the main shaft 18, while each of the connecting arms 24 rotates about the short shaft portion 22 which is displaced relative to the main shaft 18 in the upper right direction in FIG. . Therefore, as can be easily understood from FIG. 4, the distance between the bracket 26 fixed to each of the pair of side plates 20a and 20b of the main frame 12 and the free end of the connecting arm 24, and thus the bracket 26. The distance between the main frame 12 and the block 34 whose position with respect to the rod 30 is restricted by the free end of the connecting arm 24 is equal to
It is the shortest when it is in the operating position shown by the solid line in the figure, and gradually increases as it is turned toward the non-operating position shown by the chain double-dashed line. Therefore, the coil spring 36, which is interposed between the bracket 26 and the block 34 and acts in a direction to increase the distance between the block 34 and the bracket 26, moves the main frame 12 to the first position. The elastic biasing force M in the direction of turning from the acting position shown by the solid line in FIG. 4 to the non-acting position shown by the chain double-dashed line, that is, in the direction of turning the main frame 12 clockwise when viewed from the lower right in FIG. _{1 is applied} to the main frame 12. The elastic biasing force M ₁ such as that of the coil spring 36 is the largest when the main frame 12 is in the position shown by the solid line in FIG. 4, and gradually decreases as it is turned toward the non-acting position. On the other hand, in the main frame 12, in addition to the elastic biasing force M ₁ as described above by the coil spring 36, the weight of the main frame 12 and various components attached thereto (these will be mentioned later). Due to, the following forces also act. That is, as can be easily understood from FIG. 3, the weight W of the main frame 12 and the various components attached thereto is determined by the weight W of the third when the main frame 12 is in the operating position shown in FIG. In the figure, a moment M ₂ = W × l in the counterclockwise direction (counterclockwise direction when viewed from the lower right in FIG. 4) is exerted on the main frame 12. This moment M
_2, the main frame 12 is the be pivoted by an angle θ in the clockwise direction with the FIG. 3 toward the inactive position from the operating position, is reduced to M = W × l × cosθ. That is, the main frame 1
2 gradually decreases as it is swung clockwise in FIG. 3 from the operating position to the non-operating position.
In the illustrated example, when the main frame 12 is in the operating position shown by the solid lines in FIGS. 3 and 4, the main frame 12 is moved clockwise in FIG. 3 (from the lower right in FIG. 4). The main frame 12 is seen counterclockwise in FIG. 3 (from the lower right in FIG. 4) rather than the elastic biasing force M ₁ by the coil spring 36 acting in the direction of turning in the clockwise direction. The moment M ₂ due to the weight W acting in the direction of turning in the counterclockwise direction) is larger (M ₂ > M ₁ ), and the main frame 12 is moved from the acting position to the non-acting position in a third direction. When turning in the clockwise direction (clockwise when viewed from the lower right in FIG. 4) in the figure, the degree of decrease of the moment M ₂ due to the weight W is larger than the degree of decrease of the elastic biasing force M ₁ . Main frame 12
Is rotated from the acting position to the non-acting position by a predetermined angle θ ₂ which may be, for example, 50 to 60 degrees, M ₁ =
M ₂ (= W × 1 × cos θ _s ), and when the main frame body 12 is further swung toward the non-acting position beyond the angle θ _s , M ₁ > M ₂ is set. Because of this, when the main frame 12 is swung from the operating position to the non-operating position over the angle θ _s , the elastic biasing force M ₁ (M ₁ > M ₂ ) by the coil spring 34 is generated. ) Is forced to the non-acting position. When the main frame 12 reaches the non-acting position shown by the chain double-dashed line in FIG. Thus, the main frame 12 is prevented from exceeding the non-acting position and further turning clockwise as viewed from the lower right side in FIG. On the other hand, when allowed to pivot the main frame 12 beyond the angle theta _s in the counterclockwise direction as viewed from the lower right in FIG. 4 toward the action position from the inactive position, the main frame 1
2 is forcibly positioned and held in the operating position by the moment M ₂ (M ₂ > M ₁ ) due to the weight W.

Next, referring to FIGS. 1 to 3, referring to the configuration of the main frame body 12 itself, the main frame body 12 includes an upper plate disposed between the upper edges of the pair of side plates 20a and 20b described above. 42
And a lower plate 44 disposed between the lower edges of the pair of side plates 20a and 20b. The upper plate 42 defines a substantially flat document receiving surface 46 on the upper surface of the main frame 12. This document receiving surface 46
Receives a document discharged from the inside of the main frame 12, as will be described later. On the upper surface of the upper plate 42 that defines the document receiving surface 46, a regulation member 48 that regulates the leading edge of the document discharged onto the document receiving surface 46 and aligns the discharged documents is arranged in the size of the document. Accordingly, it is preferable that the position is fixed so as to be adjustable. The positionally adjustable fixing of the restricting member 48 to the upper surface of the upper plate 42 is performed, for example, by forming at least a part of the restricting member 48 from a permanent magnet, and by the magnetic attraction force of the permanent magnet, an arbitrary upper surface of the upper plate 42. This can be achieved by fixing the regulating member 48 to the position. Main frame 1
The lower plate 44 defining the lower surface of 2 is located somewhat above and substantially parallel to the transparent plate 8 when the main frame 12 is positioned in the working position as shown in FIG. The main portion 52 of the document feeding path 50 is defined between the main portion 52 and the upper surface of the document 8.

In addition to the main part 52, the document feeding path 50 has an introduction part 54 located upstream of the main part 52, and a curving lead-out part 56 connecting the main part 52 to the document receiving surface 46. In the illustrated example, the introduction portion 54 of the document transport path 50 is defined in the support frame 10, and the curved lead-out portion 56 of the document transport path 50 is the other end or free end (first end) of the main frame 12. It is specified in the left end part in FIG.

Referring to FIG. 5, FIG. 6, and FIG. 7-A together with FIG. 3, the introduction portion 54 of the document transport path 50 is the support frame 1
0 between the above-mentioned pair of upright walls 14a and 14b, the lower guide plate 58 and the upper guide plate 60 which are positioned to face each other in the vertical direction.
It is prescribed between and. The lower guide plate 58 is positioned at a predetermined position by fixing both side edges of the lower guide plate 58 to the pair of upright walls 14a and 14b. on the other hand,
The upper guide plate 60 is divided into two parts, a first part 62 located on the upstream side and a second part 64 located on the downstream side. The first portion 62 of the upper guide plate 60 is positioned at a required position by fixing both side edges of the first portion 62 to the pair of upright walls 14a and 14b. On the other hand,
The second portion 64 of the upper guide plate 60 has a connecting piece 66 projecting upward from each of both sides of the upstream end thereof and is planted on each of the inner surfaces of the pair of upright walls 14a and 14b. By pivotally connecting to the inwardly projecting pin 68, the position shown by the solid line in FIG. 7-A, i.e. the working position which cooperates with the lower guide plate 58 to define the downstream part of the introduction part 54. And a position indicated by a chain double-dashed line in FIG. 7-A, that is, a non-acting position for releasing the downstream portion of the introducing portion 54 (see FIG. 7-A, FIG. See also FIG. 6). As shown in FIG. 6, a pin 70 is further provided on the inner surface of the pair of upright walls 14a and 14b.
And projecting pieces 7 formed on both side edges of each of the pins 70 and the second portion 64 of the upper guide plate 60.
A spring 74 is interposed between the two. The spring 74 causes the second portion 64 of the upper guide plate 60 to move to the 7-A-th direction.
The solid line in the figure and the action position and the sixth position indicated by the two-dot chain line in FIG.
It is elastically biased to one of the non-acting positions shown by the solid line in the figure and shown by the two-dot chain line in FIG. It has a so-called dead center state in which it is compressed).

Corresponding to the fact that the second portion 64 of the upper guide plate 60 is rotatably mounted, an openable / closable lid member 76 is provided above the second portion 64 of the upper guide plate 60. There is. Explaining with reference to FIG. 5 and FIG. 6 together with FIG. 7-A, both side portions of one end portion (right end portion in FIG. 7-A) of the lid member 76 are projected downward. A connecting piece 78 is provided, and each of the connecting pieces 78 is rotatably connected to a pin 80 that is planted on each of the inner surfaces of the pair of upright walls 14a and 14b and projects inward in the lateral direction, The lid member 76 has a closed position shown by a solid line in FIGS. 5 and 7-A and a closed position shown by a two-dot chain line in FIG. 6, and an open position shown by a two-dot chain line in FIG. 6-A. It is mounted so that it can rotate freely between. In the closed position shown in solid lines in FIGS. 5 and 7-A and in double-dotted lines in FIG. 6, the lid member
The free end (the left end in FIG. 7-A) of 76 is the main frame 12
One edge of the upper plate 42 (right edge in FIG. 7-A)
It is locked on the upper surface of. Therefore, the lid member 76 is shown by the solid line in FIG. 6 by gripping the grip portion 82 formed at its free end and pivoting itself in the clockwise direction in FIG. 7-A, as shown in FIG. 7-A. In addition to being set to the open position indicated by the chain double-dashed line in FIG.
Even if it is set to the non-acting position shown by the solid line in the figure and shown by the chain double-dashed line in FIG. 4, the lid member 76 is attached to the upper plate 42 of the main frame 12.
7 is swung clockwise in FIG. 7-A, so that it is swung to the open position shown by the solid line in FIG. 6 and by the chain double-dashed line in FIG. 7-A. A hanging piece 84 is provided on the back surface of the lid member 76.
And an upright piece 86 is provided on the upper surface of the second portion 64 of the upper guide plate 60, and the hanging piece 84 and the upright piece 86 are connected to each other by a connecting piece 88 such as a wire. The second portion 64 of the guide plate 60 is the lid member 7.
It is configured so that it can be turned in conjunction with 6.
That is, the lid member 76 is shown by a solid line in FIG.
When in the closed position indicated by the dotted line,
The portion 64 is located at the working position which cooperates with the lower guide plate 58 to define the downstream portion of the introduction portion 54, but by turning the lid member 76 itself or by the main frame 1
When the lid member 76 is moved to the open position shown by the two-dot chain line in FIG. 7-A and shown by the solid line in FIG. 6 by setting 2 to the non-acting position, it is interlocked with the swinging movement of the lid member 76 to the open position. The second portion 64 of the upper guide plate 60 is swung to the non-acting position shown by the solid line in FIG. 6 and shown by the chain double-dashed line in FIG. 7-A to release the downstream portion of the introduction portion 54. As described above, when a document is jammed in the downstream side of the introduction section 54 of the document transport path 50, the lid member 76 itself is swung or the main frame body 12 is moved to the non-acting position to close the lid. It will be apparent that as long as the member 76 is moved to the open position, the downstream portion of the introduction portion 54 of the document feeding path 50 is opened, and thus the jammed document can be easily taken out.

As shown in FIG. 1, FIG. 2 and FIG. 7-A, in the illustrated embodiment, the original table 9 is provided on the upstream end side of the support frame 10.
0 is attached. As clearly shown in FIG. 7-A, the upper surface of the document table 90 has the above-described document transport path 50.
Manual positioning guide surface 9 following the upstream end of the introduction portion 54 of
2 is specified. On the upper surface of the document table 90, a document 94 (seventh-A-th) which is placed on the document manual positioning guide surface 92 and is inserted into the introduction portion 54 of the document transport path 50 will be described later.
A guide ridge 96 is formed to regulate the position of one side edge of the drawing) and thus regulate the position of the original 94 in the width direction.

In the introduction section 54 of the document conveyance path 50 described above, the document 94 inserted in the introduction section 54 is further passed through the introduction section 54 to the main section 5
2 and a first original that can project into the introducing section 54 downstream of the introducing and conveying roller pair 98 and prevent the original 94 from passing through the introducing section 54. The position regulating member 100 is arranged.

Referring to FIG. 5, FIG. 6, FIG. 7-A and FIG. 7-B, a document 94 is conveyed through the document conveyance path 50 together with an endless conveyance belt and a document guide roller which will be described later. Introducing conveyance roller pair 9 that constitutes the document conveyance mechanism
8 is composed of a driven roller 102 and a driven roller 104. With particular reference to FIG. 5, a support shaft 108 is rotatably mounted between the pair of upright walls 14a and 14b of the support frame 10 by bearing members 106a and 106b, and at least the support shaft 108 is attached to the support shaft 108. 1
Four driven rollers 102 are mounted at an interval, in the illustrated case, at intervals in the width direction. In addition, a suspension rod 110 extending in the width direction is provided on the pair of upright walls 14a and 14b.
Is rotatably attached. A bracket 112 (only one of which is shown in FIG. 5) protruding in the upstream direction is fixed to each of the vicinity of both ends of the suspension rod 110, and the support shaft 1 is interposed between the brackets 112.
14 is rotatably mounted. Further, on the support shaft 114, at least one driven roller 104 that cooperates with the driven roller 102, and in the illustrated case, four driven rollers 104 are arranged at intervals in the width direction. The suspension rod 110
An arm 116 is fixed to one end of the arm, that is, an end protruding laterally outward through the upright wall 14b, and a free end of the arm 116 is fixed to an outer surface of the upright wall 14b. The output end of the solenoid 118 is rotatably connected. As can be seen from FIGS. 5 and 7-A, the driven roller 102 always passes downwardly through the notch 120 formed in the first portion 62 of the upper guide plate 60 and is directed downwardly into the document feeding path 50. Although it projects into 54, the driven roller 1
In a normal state, that is, in a state where the solenoid 118 is deenergized, 04 is positioned at a non-acting position which is located below the lower guide plate 58 apart from the driven roller 102. However, when the solenoid 118 is energized, the suspension rod 110 is shown in FIG.
It is swiveled in the direction indicated by 22 and thus the driven roller 10
As shown in FIG. 7-B, the reference numeral 4 designates an introduction portion 5 of the original conveying path 50 through an opening 123 formed in the lower guide plate 58.
4 into the working position where the driven document 102 comes into contact with or comes close to the driven roller 102,
If 94 is inserted, the original 94 is nipped between it and the driven roller 102. Of course, the driven roller 104
By moving the driven roller 102 and the driven roller 104 in the introducing section 54 of the document transport path 50 so that the driven roller 102 and the driven roller 104 contact each other or come close to each other. By moving both the driven roller 102 and the driven roller 104, the driven roller 102 and the driven roller 10 are moved.
It is also possible to bring the sheets 4 into contact with or close to each other in the introduction portion 54 of the document feeding path 50. As clearly shown in FIG. 5, the support shaft 108 on which the driven roller 102 is mounted is shown.
A toothed belt wheel 124 is attached to one end portion of the above, that is, the end portion that penetrates the upright wall 14a and projects outward in the lateral direction. The toothed belt wheel 124 is connected via a timing belt 126 to an appropriate drive source (see FIG. 11) such as an electric motor arranged in the support frame pair 10. When the drive source is energized, the support shaft 108 and the driven roller 102 mounted on the support shaft 108 are rotated in the direction indicated by the arrow 128, so that the driven roller 104 is moved to the 7th position.
In the operating position shown in FIG. B, the original 94 nipped between the driven roller 102 and the driven roller 104 by the cooperation of the driven roller 102 and the driven roller 104 is advanced through the introduction portion 54 of the original conveying path 50 and is moved to the main portion. Sent to 52.

In the illustrated example, the first document position restricting member 100 is at least one fixed to the suspension rod 110, as shown in FIG. 5, and spaced apart in the width direction in the illustrated case. It is composed of four fixed protruding pieces. The first document position restricting member 100 in the illustrated example is moved by the solenoid 118 integrally with the driven roller 104 of the introducing and conveying roller pair 98 because it is fixed to the suspension rod 110. When the solenoid 118 is deenergized (hence the driven roller 10
4 is in the non-acting position), the free end of the first document position regulating member 100 is formed on the lower guide plate 58 as shown in FIGS. 5 and 7-A. It projects through the opening 130 to the introduction portion 54 of the document conveying path 50, and further, crosses the introduction portion 54 and penetrates into the opening 132 formed in the second portion 64 of the upper guide plate 60, and thus the document conveying path 5
It is positioned at a blocking position that blocks the document 94 from passing through the 0 introduction section 54. On the other hand, when the solenoid 118 is biased (thus, the driven roller 104 is positioned at the above-mentioned operating position), the free end portion of the first document position regulating member 100 moves the document as shown in FIG. 7-B. It is positioned below the lower guide plate 58 after retreating from the introduction portion 54 of the path 50, and is thus positioned at a non-blocking position that allows the document 94 to pass through the introduction portion 54 of the document conveyance path 50.

As shown in FIG. 3, the document feeding / discharging device 4 shown in FIG. 3 further conveys the document conveyed from the introduction section 54 of the document conveying path 50 to the main section 52 through the main section 52, and further the main section. The document receiving surface 4 is conveyed from 52 through the curving lead-out portion 56.
6, at least one, and in the illustrated case, four endless conveyor belts 13 arranged at intervals in the width direction.
4 (see also FIGS. 5 and 8). As shown in FIG. 5, four rollers 136 are mounted on the main shaft 18 at intervals in the width direction. On the other hand, as shown in FIGS. 8 and 10-A, the main frame 1
At the free end of 2 (that is, the left end in FIG. 3), support shafts 138 and 140 are rotatably mounted between the pair of side plates 20a and 20b of the main frame 12. The support shaft 138 has four rollers 14 spaced in the width direction.
2 (only one of which is shown in FIGS. 8 and 10-A) is mounted, and the support shaft 140 is also provided with four rollers 144 (the first roller 144 at a widthwise interval). 8 and 10-A, only one of which is shown). Each of the four endless belts 134 has a support shaft 138 and a roller 136 mounted on the main shaft 18, as can be easily understood from FIG.
Is wound around each of the rollers 142 mounted on the main shaft 18 and each of the rollers 144 mounted on the support shaft 140.
To the roller 142 attached to the main portion 5 of the document transport path 50.
2 (and thus the lower side of the lower plate 44), and an original transport from the roller 142 mounted on the support shaft 138 to the roller 144 mounted on the support shaft 140 following the operating travel part. An operating running portion extending through the curved derivation portion 56 of the path 50, and further from the roller 144 mounted on the support shaft 140 to the roller 13 mounted on the main shaft 18.
6 has a non-running running portion extending between the upper plate 42 and the lower plate 44. As shown in FIGS. 5 and 7-A, a guide rod 146 is rotatably mounted between the pair of side plates 20a and 20b of the main frame 12 adjacent to the main shaft 18. The guide rod 146 is used for the endless conveyor belt 1.
Each of the rollers 34 is guided so that the winding contact of the endless conveyor belt 134 with the roller 136 is sufficient. Further, as shown in FIGS. 8 and 10-A, the support shaft 1
A pair of side plates 20 of the main frame 12 adjacent to 38 and 140
A support rod 148 is mounted between a and 20b, and four support arms 150 (only one of which is shown in FIGS. 8 and 10-A are spaced apart in the width direction from the support rod 148. Is attached so that it can freely rotate. The free end of each of the support arms 150 acts on each of the endless conveyor belts 134 and the endless conveyor belt 1
A tension setting roller 152 for setting the tension of each of 34 to a desired value is rotatably mounted. The tension of each of the endless conveyor belts 134 penetrates the protrusion formed on the support arm 150, and the adjusting screw 154 screwed to the stationary member 153 located thereunder is screwed to the stationary member 153. Adjusting the degree, support arm 15
By appropriately adjusting each angular position of 0, and hence the position of the tension setting roller 152, a desired value can be set. Referring again to FIG. 5, a toothed belt wheel 156 is attached to one end of the main shaft 18, that is, the end that penetrates the side plate 20a and projects outward in the lateral direction. The above-mentioned introduction conveyance roller pair 9
Support shaft 108 on which the driven roller 102 of No. 8 is mounted
In addition to the above toothed belt wheel 124, a toothed belt wheel 158 is further attached to one end portion of the above, that is, the end portion that penetrates the upright wall 14a and projects outward in the lateral direction. A timing belt 160 is wound around the toothed belt pulley 156 and the toothed belt pulley 158. As such, it is clear that the main shaft 18 is connected to the support shaft 108 and, therefore, via the support shaft 108 to a suitable drive source such as an electric motor (see FIG. 11). Let's do it. When the drive source is energized, the support shaft 108 is rotated in the direction shown by the arrow 128, as described above, so that the main shaft 18 and the roller 136 attached thereto are also shown by the arrow 128.
Is rotated in the direction indicated by, and thus the endless conveyor belt 134 is
Are moved in the direction indicated by arrow 128.

In the illustrated embodiment, as further illustrated in FIG.
Four blocks 162 (shown in FIG. 3) are spaced apart in the width direction on the upper surface of the lower plate 44 of the main frame body 12 corresponding to substantially the middle portion of the main portion 52 of the original conveyance path 50 when viewed in the conveyance direction. (Only one of them is shown) is fixed. A plate spring 164 is fixed to each of the blocks 162, and a hemispherical pressing piece 166 is fixed to each free end of the plate spring 164. Each of the pressing pieces 166 is elastically biased downward by the elastic biasing action of the leaf spring 164 and protrudes downward through the opening formed in the lower plate 44, and presses the back surface of each of the endless conveyor belts 134 to endlessly. The surface of the transport belt 134 is brought into contact with or close to the surface of the transparent plate 8, and thus, when a document (not shown in FIG. 3) is present at a substantially intermediate portion of the main portion 52 of the document transport path 50, there is no end. The surface of each of the conveyor belts 134 is pressed against the document.

The main portion 52 of the document transport path 50 further includes the document transport path 50.
Second document position restricting member 168 that can project the vicinity of the downstream end of the main part 52 and prevent the document from passing through the main part 52, and the second document position restricting member 168 prevents the document from advancing. There is provided a pressing roller 170 capable of pressing the back surface of each of the endless conveyor belts 134 to bring each surface of the endless conveyor belts 134 into contact with or approach the surface of the transparent plate 8 at a position slightly upstream of the position. .

Explaining with reference to FIG. 8 and FIG. 10-A, between the pair of side plates 20a and 20b of the main frame body 12 is arranged above the main portion 52 of the document conveying path 50 and the document position regulating member. A suspension rod 172, which constitutes an operating means for operating the pressing roller 170 and 168, is rotatably mounted. The actuating means is composed of a suspension rod 172 and a connecting piece 174, one end of which is fixed to the suspension rod and the other end of which is connected to a solenoid 176 as a driving means described later. Then, the second original document position regulating member 1
68 is the suspension rod 17 in the illustrated embodiment.
It is constituted by one (or a plurality of pieces fixed at intervals in the width direction) fixed to No. 2. A connecting piece 174 is further fixed to the upper surface of the suspension rod 172, and an output end of a solenoid 176 fixed at a predetermined position in the main frame 12 is rotatably connected to the connecting piece 174. When the solenoid 176 is deenergized, the second document position restricting member 168 is shown in FIGS.
The opening 1 formed in the lower plate 44 as shown by the solid line in FIG.
The document transport path 5 passes between the endless transport belts 134 through 78.
It projects into the main body 52 of zero and is thus located in the blocking position which blocks the advance of the document through the main body 52. 10th-
As shown in FIG. A, it is important that the position where the second document position restricting member 168 prevents the document from advancing is near the front edge of the transparent plate 8 (that is, the left edge in FIG. 10-A). . On the other hand, when the solenoid 176 is energized, the suspension rod 172 is swung in the direction indicated by the arrow 180, and the second document position restricting member 168 causes the document transport path 50 to move as shown by the two-dot chain line in FIG. 10-A. It is positioned at a non-blocking position that allows the document to move forward after retreating from the main portion 52 of the document.

Four suspension arms 182 are further fixed to the suspension rod 172 at intervals in the width direction (three of them are shown in FIG. 8), and each of the suspension arms 182 is fixed. The above-mentioned pressing roller 170 is rotatably attached. Therefore, the pressing roller 170 in the illustrated specific example is moved integrally with the second document position restricting member 168 by the action of the solenoid 176. When solenoid 176 is de-energized (thus the second
(When the document position restricting member 168 is positioned at the blocking position), each of the pressing rollers 170 is positioned above the lower plate 44 as shown by the solid line in FIGS. 8 and 10-A. Therefore, the endless conveyor belt 134 is positioned at a non-acting position where it does not act. On the other hand, when the solenoid 176 is biased (thus, the second document position restricting member 168 is positioned at the non-blocking position), each of the pressing rollers 170 causes the lower plate as shown by the chain double-dashed line in FIG. 10-A. Through the opening 184 formed in 44, and projecting downward to press the back surface of the endless conveyor belt 134, thus bringing the surface of the endless conveyor belt 134 into contact with or close to the surface of the transparent plate 8;
When a document (not shown in FIGS. 8 and 10-A) is present at the downstream end of the main portion 52 of the document transport path 50, each surface of the endless transport belt 134 is pressed against the document. .

Next, FIGS. 8, 9 and 10-A and 10-
Explaining with reference to FIG. B, in the illustrated specific example,
The curved lead-out portion 56 of the document conveyance path 50 is defined by a guide plate 186 having an arc-shaped cross section, which is fixed between the free ends of the pair of side plates 20a and 20b of the main frame 12. The guide plate 186 is located opposite to the rollers 142 and 144 around which the endless conveyor belt 134 is wound, as clearly shown in FIG. Documents carried out from the section 52 (Fig. 8,
The document receiving surface 4 defined by the upper surface of the upper plate 42 by guiding (not shown in FIGS. 9 and 10-A) upward.
Lead to 6. In the curved leading-out portion 56 of the document feeding path 50, an upstream-side document leading-out roller 188 is brought into contact with or close to the surface of the endless feeding belt 134 at a position facing the roller 142.
And the endless conveyor belt 13 at a position facing the roller 144.
4 is provided with a downstream side document lead-out roller 190 which is brought into contact with or brought close to the surface of No. 4. Referring to the mounting method of the upstream original pulling roller 188 and the downstream original pulling roller 190, as shown in FIGS. 8 and 9, between the free ends of the pair of side plates 20a and 20b of the main frame 12.
A suspension rod 192 is rotatably mounted. A support arm 1 extending downward is provided at both ends of the suspension rod 192.
94 is fixed, and a support shaft 196 is rotatably mounted between the support arms 194. Then, four upstream document leading rollers 188 are mounted on the support shaft 196 at intervals in the width direction. The suspension rod 1
A support arm 198 is rotatably attached to both ends of the support 92, and a support shaft 200 is rotatably attached between the support arms 198. Then, four downstream document leading rollers 190 are mounted on the support shaft 200 at intervals in the width direction. A spring 202 is interposed between each of the support arms 194 and each of the support arms 198. The spring 202 elastically biases the suspension rod 192 and the support arm 194 fixed thereto in the counterclockwise direction when viewed from the lower right in FIG.
In this way, each of the upstream-side original feeding rollers 188 mounted on the support shaft 196 has an opening 204 formed in the guide plate 186.
Through the curved lead-out portion 56, and the endless conveyor belt 1
The surface of 34 is elastically contacted. At the same time, the spring 202 elastically biases the support arm 198 clockwise when viewed from the lower right in FIG.
Each of the downstream-side document leading-out rollers 190 mounted at 0 also protrudes into the curved leading-out portion 56 through the opening 206 formed in the guide plate 186, and is brought into elastic contact with the surface of the endless conveyance belt 134.

In the illustrated example, when the main frame body 12 is further moved from the operating position to the non-operating position, the upstream side document lead-out roller 188 and the downstream side are opposed against the elastic biasing action of the spring 202. The following mechanism is provided to automatically position the document lead-out roller 190 from the working position where it contacts the surface of the endless transport belt 134 to the non-working position where it separates from the surface of the endless transport belt 134.
Explaining with reference to FIG. 8 and FIG. 9, a projecting piece 208 is fixed to one end of the suspension rod 192, that is, one end projecting laterally outwardly through the side plate 20b,
A pin 210 is planted in the protruding piece 208. On the other hand, the bracket 212 and the pin 214 are fixed to the outer surface of the side plate 20b.
A sliding piece 216 is supported by 14 so as to be vertically slidable. A coil spring 218 that elastically biases the sliding piece 216 downward is stretched between the upper end of the sliding piece 216 and the bracket 212. Further, a pair of brackets 220 is fixed to the main frame 12, and an interlocking piece 222 is swingably supported on each of the brackets 220. Each one end of the interlocking piece 222 is connected to the support arm 194 and the other end is connected to the support arm 198. In such a mechanism, when the main frame body 12 is placed in the working position, the lower end of the sliding piece 216 protruding through the bracket 212 abuts on the upper surface of the copying machine housing 2 and thereby the sliding piece. 216 is maintained in the condition illustrated in FIGS. 8, 9 and 10-A. However, as shown in FIG. 10-B, the main frame 12
When the arm is lifted from the working position to the non-working position, the elastic biasing action of the spring 218 causes the sliding piece 216 to move the upper end of the elongated slot 224 formed therein to the pin 2
It is moved downward to a position where it abuts 14. As a result, the protrusion 226 formed on the sliding piece 216 abuts the pin 210, whereby the suspension rod 192 and the support arm 194 are pivoted clockwise in FIGS. 10-A and 10-B, thus The upstream document delivery roller 188 is separated from the surface of the endless transport belt 134 and retracts to the back of the guide plate 186 to the non-acting position shown in FIG. 10-B. At the same time, the swing movement of the support arm 194 as described above causes the interlocking piece 222 to swing in the counterclockwise direction when viewed from above in FIG.
8 is rotated counterclockwise in FIGS. 10-A and 10-B, and thus the downstream side document leading roller 190 is also separated from the surface of the endless transport belt 134 and retracted to the back of the guide plate 186 to move the 10-th direction. The non-acting position shown in FIG. As described above, when the original is jammed at the curved guide portion 56 of the original conveying path 50, the main frame 12 is simply lifted from the operating position to the non-operating position, and the upstream-side original guide roller 188 is provided. And the downstream document leading roller 190 is the first
It is automatically positioned in the non-actuated position shown in Figure 0-B, and thus the jammed original can be retrieved very easily.

The document feeding and discharging apparatus 4 shown in the figure is further provided with the following various detectors which constitute a part of control means for controlling the operation of various components thereof.

Explaining with reference to FIG. 5, the rotation amount of the support shaft 108,
Therefore, the introduction conveyance roller pair 98 and the endless conveyance belt 134
An operation amount detector 228 for detecting the drive amount of the is provided. The operation amount detector 228 is positioned so as to straddle the detected plate 230 attached to one end of the support shaft 108 that penetrates the upright wall 14a and projects laterally outward. It is composed of an optical detector 232. The plate to be detected 230 has a plurality of notches 234 formed at intervals in the circumferential direction on the periphery of the plate to be detected 230. And a light receiving element located on the opposite side of the detection plate 230. When the detected plate 230 is rotated according to the rotation of the support shaft 108, a light beam from the light emitting element of the optical detector 232 is received every time the notch 234 of the detected plate 230 passes the optical detector 232. The light is received by the device and thus the optical detector 232 produces a pulsed signal. Therefore, by counting the pulse-shaped signals generated by the optical detector 232, the rotation amount of the support shaft 108, that is, the driving amount or the operating amount of the introduction conveyance roller pair 98 and the endless conveyance belt 134 can be detected. .

Further, as shown in FIGS. 3, 5, 6 and 7-A, the first document position restricting member 100 in the introduction portion 54 of the document transport path 50 prevents the document from advancing. A first document detector 236 for detecting a document is provided upstream of the position. In the illustrated example, the first document detector 236 is located below the lower guide plate 58 that defines the introduction portion 54 of the document transport path 50 and above the second portion 64 of the upper guide plate 60. It is composed of an optical detector having a light emitting element and a light receiving element disposed, and through an opening 238 formed in the lower guide plate 58 and an opening 240 formed in the second portion 64 of the upper guide plate 60, When the first document position restricting member 100 is at the blocking position, the introducing section 54 is monitored upstream of the blocking position for blocking the progress of the document, and the document passing therethrough is detected.

Further, as shown in FIG. 3, FIG. 8, FIG. 9 and FIG. 10-A, a second document detector 242 for detecting a document at the curved lead-out portion 56 of the document conveyance path 50 is provided. . The second document detector 242 is, in the specific example shown,
Micro switch 24 disposed on the back surface of the guide plate 186
4 and the operating piece 24 for this microswitch 244
It is composed of 6. The operation piece 246 rotatably attached to the pin 248 that is planted in one of the support arms 198 described above has an opening 250 formed in the guide plate 186.
It has a sensing portion projecting through the curved lead-out portion 56 and an actuating portion located opposite to the actuator 252 of the microswitch 244. The operating piece 246 is usually the tenth
Although the original state is maintained as shown in FIG. 10A, when a document moving through the curving lead-out portion 56 comes into contact with the sensing portion, it is rotated counterclockwise in FIG. The part presses the actuator 252 of the microswitch 244, thus switching the microswitch 244.

Furthermore, as shown in FIGS. 3, 5, and 7-A, a main frame position detector 254 is provided. The main frame body position detector 254 is composed of a micro switch having an actuator 256 in the illustrated specific example. As shown by the solid line in FIG. 7-A, the main frame body position detector 254 has a rear edge of the lid member 76 when the main frame body 12 is positioned at the working position and the lid member 76 is set at the closed position. The projecting piece 258 formed on the actuator 25
6 is pressed and thus brought into the first or open state. On the other hand, the main frame body 12 is positioned at the non-acting position shown in FIG. 2, and the lid member 76 is accordingly moved to the open position shown by the solid line in FIG. 6 and shown by the chain double-dashed line in FIG. 7-A. Then, the projecting piece 258 is separated from the actuator 256, so that the projecting piece 258 is brought into the second state, that is, the closed state. Also, when the main frame 12 is positioned at the working position,
Even when the lid member 76 itself is operated to be in the open position, the projecting piece 258 is disengaged from the actuating element 256 to be brought into the second state, that is, the closed state.

Next, referring also to FIG. 11 which shows a control circuit diagram which constitutes a control means together with the above-mentioned various detectors 228, 236, 242 and 254, the operation of the document feeding and discharging apparatus 4 as described above. The effects will be summarized and explained.

(I) Manual positioning of a document or start of document feeding; (Ii) Preparatory operation; When the document feeding and discharging device 4 is used to perform document feeding and discharging semi-automatically, FIG. As shown in FIG. 3, the main frame 12 is positioned at the working position and the lid member 76 is set at the closed position. Thus, the main frame position detector 254 is in the first state, that is, the open state, and the output signal thereof is "L". At this time, the electrostatic copying machine main body and the document feeding and discharging device 4 are prevented from jamming copy paper in the electrostatic copying machine main body or document jamming in the document feeding and discharging device 4 as described later. If no abnormality has occurred, a normal signal "H" is supplied to the AND gate A1 from the main control means (not shown) of the main body of the electrostatic copying machine, and the flip-flop F in the reset state.
From the output end of F1, through the inverter IN1 from the main frame position detector 254, from the output end of the flip-flop FF2 in the reset state, no original is detected, and the first original detection whose output signal is “L” is detected. The signal “H” is supplied from the device 236 to the AND gate A1 through the inverter IN2, and thus the signal “H” is generated at the output end of the AND gate A1. Lamp L1 supplied to lamp L1
1 is turned on.

(I-ii) Manual document positioning: After the lamp L1 is turned on, the document 94 to be copied (7th-
(Fig. A) is manually placed on the document manual positioning guide surface 92 of the document table 90, and then the document 94 is moved forward with one edge of the document 94 in contact with the guide strip 96 to move the front part of the document 94. Is partially inserted into the introduction portion 54 of the document transport path 50, and thus, as shown in FIG. 7A, the first document position regulating member 100 in which the leading edge of the document 94 is positioned at the blocking position.
Abut or approach.

Thus, the first document detector 236 detects the document 94 and generates a document manual positioning end signal, that is, the output signal becomes "H". Therefore, the signal supplied from the first document detector 236 to the AND gate A1 through the inverter IN2 becomes "L", and the lamp L1 is extinguished. When the document 94 is fed and the trailing edge of the document 94 passes the detection position of the first document detector 236, it is turned on again.

(I-iii) Start of document feeding; When the output signal of the first document detector 236 becomes "H" as described above, the signal "H" changes to the AND gate A2.
And the delay circuit D1. At this time, since the flip-flop FF3 is in the reset state, the signal “H” is supplied to the AND gate A2 also from the output end of the flip-flop FF3, and thus the signal “H” is generated at the output end of the AND gate A2. The output signal “H” is supplied to the AND gate A3. The AND gate A3 is also supplied with the signal "H" from the delay circuit D1 after a lapse of a predetermined delay time set by the delay circuit D1, and thus the AND gate A3 generates an output signal "H" at its output end. This output signal "H" is supplied to the AND gate A4 via the OR gate O1. Also, AND gate A4
Is also supplied with the signal "H" from the output terminal of the flip-flop FF4 in the reset state, thus generating the signal "H" at the output terminal of the AND gate A4, and the signal "H" is supplied to the input terminal of the flip-flop FF5. Supplied to CP. As a result, the normal signal "H" continues to be supplied from the main control means of the main body of the electrostatic copying machine (therefore, the input signal "H" exists at the input terminal D of the flip-flop FF5).
Therefore, the flip-flop FF5 is set and the signal "H" is defeated at the output terminal thereof. This signal "H" is supplied to the AND gate A5, and the signal "H" from the output terminal of the flip-flop FF4 in the reset state is also supplied to the AND gate A5. Thus, the signal "H" is supplied to the output terminal of the AND gate A5. This signal “H” is generated and supplied to the solenoid 118 to energize the solenoid 118.
Thus, when the solenoid 118 is energized, as shown in FIG. 7-B, the driven roller 104 of the introduction conveyance roller pair 98 is driven.
Is positioned at the operating position, the pair of introducing and conveying rollers 98 nips the original 94, and the first original position regulating member 1
00 is positioned at a non-blocking position that allows the document 94 to move.

At the same time, the signal “H” from the output terminal Q of the flip-flop FF5 is also supplied to the OR gate O2, and then to the AND gate A6 after a predetermined delay time set by the delay circuit D2, and thus the output terminal of the AND gate A6. A signal "H" is generated on the drive circuit, and this signal "H" is supplied to the drive source to energize the drive source. Thus, when the drive source is energized, the introduction conveyance roller pair 98 and the endless conveyance belt 1
34 is driven, and thus the feeding of the original 94 is started,
The original 94 is conveyed through the introduction section 54 and the main section 52 of the original conveyance path 50.

(II) Document feeding start or document feeding stop; (II-i) Actuating amount detector 228 detection action;
8, when the driving of the endless conveyor belt 134 is started, as can be understood from FIG. The optical detector 232 of 228 sequentially generates pulsed signals and supplies the pulsed signals to the document feeding counter C1 and the document feeding counter C2.

(II-ii) Detection of Insufficient Original or Manual Original Positioning Operation Abnormality; The original feeding counter C1 starts counting from the time when the driving source is energized and the feeding of the original 94 is started as described above. , Its first output end X1 has a pair of introducing and conveying rollers 98.
And the original 94 by a distance corresponding to the minimum size of the original in the conveying direction required for the endless conveying belt 134 to normally feed.
Output signal "H" at the time when the operation amount corresponding to the conveyance of the sheet is driven (for example, when 20 pulse signals are counted)
And outputs this output signal “H” to the flip-flop FF.
2 to the input terminal CP. At this point, the dimension of the original 94 in the transport direction is shorter than the minimum dimension of the original. Alternatively, the first document detector 236 has already detected the document 9 due to the manually positioned document 94 being manually pulled out immediately after that.
4 is no longer detected and returns to its output signal "L", this output signal "L" is converted into "H" by the inverter IN2 and the input terminal D of the flip-flop FF2 is converted.
Is supplied to. Therefore, the signal “H” is supplied to both the input terminal CP and the input terminal D of the flip-flop FF2, the flip-flop FF2 is set, and the original jam occurrence signal, that is, the signal “H” is output to the output terminal Q thereof. Is generated. This signal "H" is supplied to the flip-flop FF5 via the OR gate O3 and to the flip-flop FF6 via the OR gate O4 to clear the flip-flops FF5 and FF6, thus deenergizing the drive source and solenoid. 118 (and 176) is deenergized (the solenoids 118 and 176 are in the energized state or the deenergized state when the document jam occurrence signal or the document jam occurrence signal to be described later is generated. Regardless, it is always deenergized). At the same time, the document feeding counter C1 is also cleared. Further, the document jam occurrence signal "H" generated at the output terminal Q of the flip-flop FF2 is supplied to the lamp L2 which indicates the occurrence of the document jam and lights the lamp L2, and at the same time, the main unit of the electrostatic copying machine itself. It is supplied as a clear signal to the control means to stop or disable the operation of the electrostatic copying machine itself.

(II-iii) De-energization of the solenoid 118: As described in (I-iii) above, the feeding of the original 94 is started and the original 94 continues to be fed normally, and the trailing edge of the original 94 is the first original. When passing the detection position of the detector 236, the first document detector 236 no longer detects the document 94 and generates a document introduction completion signal, that is, the output signals “H” to “L” of the first document detector 236. Return to. Thus, the signal "L" is converted into "H" by the inverter N2 and supplied to the AND gate A7. At this time, since the signal “H” is supplied to the AND gate A7 from the output terminal Q of the set flip-flop FF5, the signal “H” is generated at the output terminal of the AND gate A7. "H" is supplied to the input terminal PR of the flip-flop FF4, and the flip-flop FF4 is set. Thus, the flip-flop F supplied to the AND gate A5
The output end of F4 changes from "H" to "L", and the solenoid 118 is deenergized, and the introduction conveyance roller pair 98
The driven roller 104 of the
The document position restricting member 100 is returned to the blocking position.

When the output signal of the first document detector 236 returns from "H" to "L", the lamp L1 is turned on again (thus indicating that the next document can be manually positioned). ).

(II-iv) Detection of original jam until the trailing edge of the original passes through the first original detector 236; the second output end y ₁ of the original feeding counter C1 is a pair of introduction conveyance rollers 98. And output at the time when the operation amount is driven (for example, when 55 pulse-shaped signals are counted) corresponding to conveying the document 94 by a distance corresponding to the maximum dimension of the document in the conveyance direction in which the endless conveyance belt 134 can be manually positioned. The signal "H" is generated and this output signal "H" is supplied to the AND gate A8. At this point, the document 9 is not scanned until the trailing edge of the document 94 passes the detection position of the first document detector 236.
4 is jammed, the first document detector 23
When 6 continues to detect the original 94 and continues to generate its output signal "H", the flip-flop FF5 is set and the signal "H" is generated at its output Q, and Since the flip-flop FF4 is in the reset state and the signal "H" is generated at the output end thereof, the signal "H" is generated at the output end of the AND gate A5, and the signal "H" is generated at the AND gate A8. Is being supplied to. Therefore, the AND gate A8 generates a signal "H" at its output terminal and supplies the signal "H" to the input terminal PR of the flip-flop FF2 via the OR gate O5. Thus, the flip-flop FF2 is set, and the original jam occurrence signal, that is, the signal "H" is output at its output terminal Q.
Is generated. When the document jam occurrence signal is generated, the operation described in (II-ii) above is performed.

(II-V) Generation of Copying Process Start Signal; The third output end z ₁ of the document feeding counter C1 operates as described later even if the conveyance of the document 94 is stopped.
The second document position restricting member 16 whose front edge 4 is in the blocking position
8 (FIG. 3, FIG. 8 and FIG. 10-A) when the introduction conveyance roller pair 98 and the endless conveyance belt 134 are driven by an operation amount sufficient to convey the original 94 to a position where it can reach (FIG. 3, FIG. 8 and FIG. 10-A) ( For example, the output signal “H” is generated at the time point when 60 pulse-shaped signals are counted). The output signal "H" is supplied to the main control means of the electrostatic copying machine itself as a copying process start signal through the OR gate O6. Then, in response to the copying process start signal, the required copying process by the electrostatic copying machine itself is started (thus, in order to start the required copying process by the electrostatic copying machine itself, the electrostatic copying machine itself is started. It is not necessary to operate the copy start switch PS provided in FIGS. 1 and 2).

(II-iv) Stop of document feeding: The fourth output end α ₁ of the document feeding counter C1 is the second document position regulating member 1 in which the leading edge of the document 94 is at the blocking position.
The introduction conveyance roller pair 98 and the endless conveyance belt 134 are driven by an operation amount necessary to convey the document 94 until a position slightly before 68 (FIGS. 3, 8, and 10-A). The output signal “H” is generated at a time point (for example, a time point when 63 pulse signals are counted). This output signal "H"
Is supplied to the flip-flop FF5 via the OR gate O3 to clear the flip-flop FF5, thus deactivating the drive source. When the drive source is deenergized, the driving of the introduction conveyance roller pair 98 and the endless conveyance belt 134 is stopped, and the feeding of the document 94 is stopped. However, the document 94 continues to move forward due to coasting after the feeding is stopped, and the leading edge of the document 94 is moved to the second document position regulating member 168 (FIGS. 3, 8, and 10-A). It is stopped when it comes into contact.

If desired, instead of deactivating the drive source by the output signal “H” generated by the fourth output end α ₁ of the document feeding counter C1, for example, the second document position regulating member 168 is used.
An additional document detector is arranged slightly in front of the position where the document 94 prevents the document 94 from advancing.
It is also possible to deactivate the drive source in response to the detection of the leading edge of the.

(III) Start or end of original discharge; (III-i) Start of original discharge; The required copying process by the electrostatic copying machine itself is started by the copying process start signal as described in (II-v) above. Then, the main control means of the electrostatic copier itself produces a non-operation signal "H". The non-operation signal "H" is the number of times when the pulse-shaped copy number signal "H" generated by the main control means at each execution of the copying process (for example, at the end of the exposure process) matches the set number of copies. When it is generated, it disappears, that is, it becomes the operation start signal "L". Then, the above signal "L"
Is converted to "H" by the inverter IN3 and supplied to the AND gate A9. Further, since the copy number signal "H" has a pulse shape, it immediately disappears, that is, becomes a signal "L",
This signal "L" is also converted to "H" by the inverter IN4 and supplied to the AND gate A9. Therefore, when the number of times of the copying process that corresponds to the set number of copies is performed, the AND gate A9 generates the signal "H" at its output terminal and supplies this signal "H" to the input terminal CP of the flip-flop FF6. .

On the other hand, at this point in time, the output signal of the first document detector 236 is "L", and this output signal "L" is converted into "H" by the inverter IN2 and the AND gate A
The signal "H" from the output terminal Q of the flip-flop FF5 which is supplied to the AND gate 7 is also supplied to the AND gate A7, and therefore the signal "H" is generated at the output terminal of the AND gate A7. , The signal “H” is supplied to the flip-flop FF4 and
F4 is set. Therefore, flip-flop F
Output terminal Q of F4 to input terminal D of flip-flop FF6
Is supplied with the signal "H".

Therefore, when the signal "H" is supplied to the input terminal CP of the flip-flop FF6 as described above, the flip-flop FF6 is set and the signal "H" is generated at the output terminal Q thereof. Then, the signal "H" is supplied to the input terminal CP of the flip-flop FF4 to clear it and is also supplied to the AND gate A10. The AND gate A10 is provided with a second document discharge counter C2 which will be described later.
Signal "H" from the output end y ₂ also is supplied, the signal "H" to the output terminal of the AND gate A10 I or not is generated. This signal “H” is sent to the solenoid 176,
Thus, solenoid 176 is energized. Solenoid 1
When 76 is urged, as shown by the chain double-dashed line in FIG. Positioned in position.

The set signal “H” from the output terminal Q of the flip-flop FF6 is also supplied to the OR gate O2. This signal "H" is generated and supplied to the drive source to energize the drive source.
Thus, the driving of the endless conveying belt 134 together with the introduction conveying roller pair 98 is started, and the document 94 is started to be discharged.
The original 94 is drawn from the main portion 52 of the original conveying path 50 to the curved lead-out portion 5.
It is discharged to the document receiving surface 46 (FIG. 1) through 6.

(III-ii) Start counting by the document discharge counter C2; When the drive source is energized as described above, (II-ii)
The actuation amount detector 228 and the optical detector 232 sequentially start generating pulsed signals as described in i). At the same time, since the flip-flop FF6 is set, the signal supplied from the output end to the document discharge counter C2 becomes "L", which causes the document discharge counter C2 to be optically operated by the operation amount detector 228. Begin counting pulsed signals from detector 232.

Original first output x ₂ of the document discharge counter C2 is initiated discharged; (III-iii) the leading edge of the document original jam detection until it reaches the second document detector 242 When the endless transport belt 134 is driven by an operation amount corresponding to transporting the document 94 by a distance sufficient for the leading edge of 94 to reach the detection position of the second document detector 242 (for example, a pulse signal). An output signal "H" is generated at the time point when 20 are counted), and the output signal "H" is supplied to the AND gate A11. At this point, the manuscript 94
If the second document detector 242 has not yet detected the document 94 due to the document 94 jamming before the leading edge of the document reaches the detection position of the second document detector 242, The output signal of the second document detector 242 is "L", and this output signal "L" is converted to "H" by the inverter IN5 and supplied to the AND gate A11. Therefore, the signal "H" is generated at the output terminal of the AND gate A11, and this signal "H" is supplied to the input terminal PR of the flip-flop FF2 via the OR gate O5. Thus, the flip-flop FF2 is set, and the original jam occurrence signal, that is, the signal "H" is generated at the output terminal Q thereof.
When the document jam occurrence signal is generated, the operation described in (II-ii) above is performed.

(III-iv) deactivating the solenoid 176; second output y ₂ of the document discharge counter C2 is normally generates a signal "H", corresponding to the conveying direction maximum dimension of the document The time when the endless conveyor belt 134 is driven by the operation amount corresponding to the start of discharging the original by the predetermined distance (for example, the time when 55 pulse signals are counted)
The signal "H" is set to "L". When the second signal output terminal y ₂ of the document discharge counter C2 becomes "L", the solenoid 176 is de-energized, thus the second original position regulating member 168 as shown by the solid line in the 10-A Figure The pressure roller 170 is returned to the blocking position and the non-acting position.

(III-V) Stopping Document Ejection; The third output end α ₂ of the document ejecting counter C2 is sufficient for ejecting the document 94 even if the document 94 has the maximum dimension in the transport direction. The output signal “H” is generated when the endless conveyor belt 134 is driven by the operation amount that can be discharged to the document receiving surface 46 (for example, when 130 pulse-shaped signals are counted). This output signal “H” is supplied to the flip-flop FF6 via the OR gate O4,
The flip-flop FF6 is cleared. Then, the signal at the output end Q of the flip-flop FF6 becomes "L", the drive source is deenergized, and the driving of the endless conveyor belt 134 together with the introduction conveyor roller pair 98 is stopped.

(III-vi) Document jam detection until the trailing edge of the document passes the second document detector 242; the third output end α ₂ of the document discharge counter C2 causes the output signal “H”. When the document 94 is generated, the document 94 is jammed before the trailing edge of the document 94 passes the detection position of the second document detector 242, and thus the second document detector 242 detects the document 94. When the output signal “H” is continuously generated (in other words, the trailing edge of the document 94 is not yet detected), the output signal “H” is continuously supplied to the AND gate A12. . On the other hand, when the flip-flop FF6 is cleared as described in (III-V) above by the output signal “H” generated by the third output end α ₂ of the document discharge counter C2, the output of the flip-flop FF6 is output. An output signal "H" is produced at the end. As a result, the document discharge counter C2 is cleared and the output signal "H" is output.
Are supplied to the AND gate A12, so that the signal "H" is generated at the output terminal of the AND gate A12. The signal “H” is supplied to the flip-flop F through the OR gate O5.
F2 is set, and thus the original jam occurrence signal, that is, "H" is generated at the output terminal Q of the flip-flop FF2. When the document jam occurrence signal is generated, the operation described in (II-) above is performed.

(IV) When the next original is manually positioned before the start of discharging the original; as described in (II-iv) above, the trailing edge of the original 94 is first.
When it passes the detection position of the original document detector 236, the output signal of the first original document detector 236 becomes “L”. However, if the next original 94 is manually positioned in a good condition before the discharge of the original 94 is started as described in (III-i), it is mentioned in (I-ii) above. As it is, the output signal of the first document detector 236 becomes "H" again. Then, this output signal "H" is supplied to the flip-flop FF3.

In such a state, as described in (III-i) above, the main control means of the electrostatic copying machine itself is activated by the operation start signal by performing the copying process the number of times corresponding to the set number of copies for the original 94. When "L" is generated, this signal "L" is converted to "H" by the inverter IN3 and supplied to the input terminal CP of the flip-flop FF3, thus setting the flip-flop FF3 and setting the signal "H" at its output terminal Q. Is generated. The signal “H” generated at the output terminal Q of the flip-flop FF3 is supplied to the AND gate A4 via the OR gate O1. When the operation start signal "L" is generated, the flip-flop FF4 is cleared as described in (III-i) above, and thus the signal "H" is generated at the output terminal Q of the flip-flop FF4. This signal "H" is also supplied to the AND gate A4.
Therefore, the signal "H" is generated at the output end of the AND gate A4 and is supplied to the input end CP of the flip-flop FF5, and the flip-flop FF5 is set. Then, as described in (I-iii) above, the next manuscript 9
4 is started, and is also followed by substantially the same procedure as described for original 94 above.

On the other hand, the signal “H” generated at the output terminal Q of the flip-flop FF3 is also supplied to the AND gate A13. Further, the signal “H” is supplied from the output terminal of the flip-flop FF1 which has been reset to the AND gate W13, so that the signal “H” is generated at the output of the AND gate A13, and the copy process start signal is supplied via the OR gate O6. Is supplied to the main control means of the electrostatic copying machine itself. Therefore,
The copying process by the main body of the electrostatic copying machine for the next original 94 is started at this point. However, if desired, as in the previous document 94, document feed electrostatic copying machine main body for the third next document 94 by the output signal "H" to output z ₁ is generated by the feed for the counter C1 It is also possible to start the copying process by.

(V) Processing of jammed document: When the document jam occurrence signal as described above is generated, the main frame 12 is lifted from the operating position to the non-operating position, or the lid member 76 (see FIG. 3, (Figs. 5, 6 and 7-A) are set to the open position, and the jammed document is taken out if it exists. When the main frame 12 is lifted from the operating position to the non-operating position or the lid member 76 is moved to the open position, the main frame position detector 254 is in the second state, that is, the closed state, and the output signal is ". Then, the original jam occurrence signal as described above is eliminated.

(VI) When placing an original on the transparent plate 8 manually; when positioning an original to be copied on the transparent plate 8 by manual operation without using the original feeding and discharging device 4 (for example, an original to be copied) Is a thick material such as a book or a relatively rigid material such as a cardboard or a metal plate), the main frame 12 is set to the non-acting position shown in FIG. As a result, the main frame position detector 254 enters the second state, that is, the closed state and becomes its output signal "H", and this signal "H" is supplied to the input terminal CL of the flip-flop FF1. FF1 is cleared. Then, the NAND gate N1 is supplied with the signal “L” from the output terminal Q of the flip-flop FF4 in the reset state and the signal “L” from the output terminal of the OR gate O6. Therefore, the signal is supplied to the output terminal of the NAND gate N1. "H" is generated and the signal "H" is supplied to the input terminal D of the cleared flip-flop FF1.

Then, the original is directly positioned manually on the transparent plate 8 as required, and the original pressing mechanism 6 is moved to the working position shown in FIG. Then, the copying process start switch PS (FIGS. 1 and 2) provided in the main body of the electrostatic copying machine is pressed, and thus the copying process by the main body of the electrostatic copying machine is started. Thus, the main control means of the main body of the electrostatic copying machine generates the non-operation signal "H", and this signal "H" is supplied to the input terminal CP of the flip-flop FF1 and the flip-flop F is supplied.
F1 is set. Therefore, the flip-flop FF1
A signal "H" is generated at the output terminal Q of the lamp L3, which causes the lamp L3 indicating that there is a document manually placed on the transparent plate 8 to be turned on. The signal “H” generated at the output terminal Q of the flip-flop FF1 is also supplied to the input terminal CL of the flip-flop FF5 via the OR gate O3 to reset the flip-flop FF5, and therefore the document feeding and discharging device 4 Even if another document is manually positioned, the solenoid 118 and the drive source are not energized. The lit lamp L3 is extinguished when the flip-flop FF1 is reset by returning the main frame 12 to the working position shown in FIG.

As described above, one specific example of the document feeding and discharging apparatus configured according to the present invention has been described in detail with reference to the accompanying drawings, but the present invention is not limited to this specific example.
It is not necessary to say that various changes and modifications can be made without departing from the scope of the present invention.

<Effects of the Invention> The document feeding and discharging device according to the present invention is configured as described above, and includes the document position regulating member and the pressing roller,
The manuscript position restricting member and the pressing roller move the manuscript position restricting member to the non-acting position when the manuscript position restricting member is positioned to the manuscript blocking position by the operating means, and move the manuscript position restricting member to the non-acting position when the manuscript position restricting member is positioned to the non-preventing position. Since it operates so that it is positioned, a relatively small conveying force is applied to the original by the endless conveying belt when feeding the original onto the transparent plate, and an endless conveying is performed when the original is discharged from the transparent plate. Since a relatively large conveying force is applied to the original from the belt, it is possible to prevent the original from wrinkling when the original is fed and to smoothly and reliably discharge the original.

Further, according to the present invention, the document position restricting member and the pressing roller are operated by a common actuating means, and the actuating means is driven by a common driving means, so that the operation is reliable and The device can be constructed inexpensively.

[Brief description of drawings]

FIG. 1 shows an electrostatic copying machine equipped with a document feeding / discharging device constructed according to the present invention, in which the main frame of the document feeding / discharging device is positioned in the operating position and the document pressing mechanism is positioned in the non-operating position. FIG. FIG. 2 shows the electrostatic copying machine shown in FIG. 1 with the main frame of the document feeding and discharging device in the non-operating position and the document pressing mechanism in the operating position. Slope view. FIG. 3 is a sectional view of the document feeding and discharging device shown in FIG. 4 to 6 are partial perspective views showing a part of the document feeding and discharging device shown in FIG. 7-A is a partial cross-sectional view showing a part of the document feeding and discharging device shown in FIG. FIG. 7-B shows a state in which document feeding is started.
The partial sectional view similar to FIG. FIG. 8 is a partial perspective view showing a part of the document feeding and discharging device shown in FIG. FIG. 9 is a side view showing a part of the document feeding and discharging device shown in FIG. 1 with a part cut away. FIG. 10-A is a partial sectional view showing a part of the document feeding and discharging device shown in FIG. FIG. 10-B is a partial cross-sectional view similar to FIG. 10-A, showing a state in which the main frame is slightly lifted from the operating position. FIG. 11 is a simplified circuit diagram showing a control circuit for the document feeding and discharging apparatus shown in FIG. 2 ... Copier housing 4 ... Original feeding and discharging device 6 ... Original pressing mechanism 8 ... Transparent plate 10 ... Stationary support frame 12 ... Main frame 46 ... Original receiving surface 50 ... Original transport Path 52 ...... Main part of document transport path 54 …… Introduction part of document transport path 56 …… Bending guide part of document transport path 90 …… Document table 98 …… Introduction transport roller pair 100 …… First document position regulation Member 134: Endless transport belt 168: Second document position regulating member 170: Pressing roller 188: Upstream document delivery roller 190: Downstream document delivery roller 228: Operation amount detector 236: First Document detector 242 ... second document detector 254 ... main frame position detector

Front page continuation (72) Inventor Zenzo Kawamori 1-2-2 Tamatsukuri, Chuo-ku, Osaka City, Osaka Prefecture Mita Kogyo Co., Ltd. (56) Reference JP-A-55-88077 (JP, A)

Claims (2)

[Claims] 1. A document having a main portion extending on a transparent plate disposed on the upper surface of a copying machine housing, an introduction portion located upstream of the main portion, and a lead-out portion located downstream of the main portion. A copy comprising: a transport path; and a document transport mechanism for transporting a document through the document transport path, the copy transport mechanism including at least one endless transport belt having an operation running portion that passes through at least the main portion of the document transport path. In a document feeding and discharging device for a machine, a blocking position that projects near the downstream end of the main part of the document transport path to prevent the document from advancing and retreats from near the downstream end of the main part to advance the document. A document position restricting member selectively positioned at a permissible non-blocking position, and a rear surface of the endless conveyor belt upstream of a position where the document position restricting member in the main portion of the document conveying path prevents the document from advancing. Press the endless transport A pressing roller movably disposed between an operating position for bringing the surface of the feeding belt into contact with or close to the transparent plate and a non-operating position for releasing the pressing of the endless conveying belt, the original document position regulating member and the original position regulating member. A pressure roller is attached, and when the document position regulating member is positioned at the blocking position, the pressure roller is positioned at the non-acting position, and when the document position regulating member is positioned at the non-blocking position, the pressure roller is positioned at the working position. And a driving means for driving the operating means, and a control means for controlling the document conveying mechanism and the driving means. And discharge device. 2. A suspension rod rotatably disposed above a main portion of the original conveying path, on which the original document position restricting member and the pressing roller are mounted, and one end of the suspension rod is fixed to the suspension rod. The document feeding and discharging apparatus for a copying machine according to claim 1, wherein the other end is a connecting piece connected to the driving means.