JPH0750342B2 - 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. This document feeding / discharging device has a working position for covering the transparent plate and a non-working position for exposing the transparent plate about an axis extending along one side edge of the transparent plate provided on the upper surface of the copying machine housing. The main frame body is mounted so as to be freely rotatable between and.
When the main frame body is positioned at the operating position, the main portion of the document transport path is defined between the lower surface of the main frame body and the transparent plate. The document transport path further includes an introduction portion located upstream of the main portion and a bending lead portion located downstream of the main portion. A document transport mechanism for transporting a document through the document transport path is also provided, and the document transport mechanism includes at least one document delivery roller mounted on the main frame.

[Problems of conventional technology]

In the conventional document feeding and discharging device of the above-mentioned form, when a document is jammed at the main part of the document transport path, the jammed document can be taken out easily by simply turning the main frame body to the inoperative position. However, if the document is jammed at the curved lead-out section of the document transport path,
It is considerably difficult to take out the jammed document without damaging it because the document lead-out roller acts on the jammed document and presses the document against the endless conveyor belt, the facing roller, or the facing plate. .

[Problems of the Invention]

The present invention has been made in view of the above facts, and its main technical problem is to simply rotate the main frame body to the non-acting position even when the document is jammed at the curved lead-out portion of the document transport path. An object of the present invention is to provide an improved document feeding and discharging device that can easily remove a jammed document without damaging it.

[Means for Solving the Invention]

In order to solve the above technical problems, according to the present invention, an operating position for covering the transparent plate around an axis extending along one side edge of the transparent plate disposed on the upper surface of the copying machine housing is provided. A main frame body mounted so as to be rotatable between a non-acting position for exposing the transparent plate, and a lower surface of the main frame body and the transparent plate when the main frame body is positioned at the acting position. An original conveying path having a main portion defined between the main portion, an introducing portion located on the upstream side of the main portion, and a curving lead-out portion located on the downstream side of the main portion, and at least one arranged on the main frame body. In a document feeding and discharging device including a document feeding mechanism for feeding a document through the document feeding path, the document feeding roller includes: Working position acting on the passing document and non-working position retracted from the working position The manuscript transport mechanism is further movably mounted between the manuscript and the setting unit, and the manuscript conveying mechanism further elastically biases the manuscript lead-out roller to the working position when the main frame is in the working position. And a separating spring member that elastically biases the original guide roller to the non-acting position when the main frame body is brought to the non-acting position, the separating spring member including the main frame body When in the position, one end is restrained by the upper surface of the copying machine housing, so that the elastic biasing action is not transmitted to the document guiding roller, and when the main frame is forced to the non-working position, the upper surface of the copying machine housing. The restriction of the one end is released and the elastic biasing action is transmitted to the document leading roller, so that the document leading roller is elastically biased to the non-acting position against the elastic biasing action of the pressing spring member. Configured to Document feed and discharge device according to symptoms is provided.

[Operation of the invention]

In the document feeding and discharging apparatus of the present invention, when the document is jammed at the leading portion of the document feeding path, the main frame body is swung to the non-acting position. As a result, the separation spring member is released from the restraint by the upper surface of the copying machine housing, and the elastic biasing action causes the document lead-out roller to move to the non-acting position against the elastic biasing action of the pressing spring member, so that the jammed document is jammed. Automatically retracts from. Therefore, the jammed document can be taken out sufficiently easily without damaging it.

[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 copier housing 2 of an electrostatic copier, which may be of a known type per se.
The upper surface of the document is equipped with a document feeder and discharge device, generally designated by the numeral 4, and in the illustrated embodiment, a document holding mechanism 6 which may itself be of a known form.

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 transparent plate 8 and the operating position (that is, the first position) that covers the transparent plate 8 about the 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, shown in FIG. 2 which is swiveled approximately 90 degrees clockwise from the above acting position when viewed from the lower right in FIGS. 1 and 2). (Position) movable main frame mounted so that it can freely rotate between
It has 12 and. 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 (that is, the position shown in FIG. 2) and the non-working position where the transparent plate 8 is exposed (for example, from the above-mentioned operating position, when viewed from the upper right in FIGS. 1 and 2). It is mounted so that it can freely rotate between the 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. The main frame body of the document feeding and discharging device 4
Position 12 in the working position above. On the other hand, the transparent plate 8 is manually operated without using the document feeding and discharging device 4.
When the document to be copied is positioned above (for example, the document to be copied is a thick one such as a book or one having a relatively high rigidity such as a thick paper or a metal plate), as shown in FIG. The main frame 12 of the feeding / discharging device 4 is set to the non-acting position, then the original is placed on the transparent plate 8 at a required position, and then the original pressing mechanism 6 is swung to the working position to move the transparent plate. 8 and the document placed on it are covered by the document pressing mechanism 6. 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). The main frame body 12 is mounted on the support frame body 10 so as to be rotatable. Referring to FIGS. 4 to 6 together with FIG. 3, a main frame body for the support frame body 10
Explaining the mounting method of 12, the support frame 10 has a pair of upright walls 14a and 14b located at a predetermined interval in the width direction (that is, the direction perpendicular to the paper surface in FIG. 3). A main shaft 18 is rotatably mounted between the upright walls 14a and 14b by bearing members 16a and 16b. On the other hand, the main frame
12 is a pair of side plates 20 that are positioned at a predetermined interval in the width direction.
a and 20b, one end of the pair of side plates 20a and 20b is rotatably connected to the main shaft 18 via the bearing members 16a and 16b, and thus the main frame body 12 has one side edge of the transparent plate 8. It is mounted on the support frame 10 so as to be rotatable about a central axis of a main shaft 18 extending along the. The main frame 12 is placed 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 following mechanism is interposed for forcibly positioning and holding either the position shown in the drawing) or the non-acting position (that is, the position shown in FIG. 2). Explaining mainly with reference to FIG. 4, 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 of the portions 22. On the other hand, the pair of side plates 20a of the main frame body 12
A pair of brackets 26 and 28 are fixed to the outer surface of each of the brackets 20 and 20b at intervals in the longitudinal direction, and a rod 30 extending between the brackets 26 and 28 is mounted on the brackets 26 and 28. The rod 30 is mounted on the brackets 26 and 28 by screwing nuts 32 onto male threads formed at both ends of the brackets 26 and 28.
And 28 can be mounted as required. If desired, one of the two nuts 32 could 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 in 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 1 of the support frame 10
4b 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 swung to and from the non-acting position shown by, the free end portion of the connecting arm 24 passes through the pin 38, the block 34, and the rod 30, and the main frame
Because it is connected to the pair of twelve side plates 20a and 20b, 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, while the pair of side plates 20a and 20b of the main frame 12 pivot about the main shaft 18, each of the connecting arms 24 is displaced to the upper right in FIG. The short shaft portion 22 located at
Turn around. 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 block 34 and the block 34 whose position with respect to the rod 30 is restricted by the free end of the connecting arm 24 is the shortest when the main frame 12 is in the operating position shown by the solid line in FIG. It gradually increases as it is turned toward the non-acting position shown by. 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 operating position shown by the solid line in FIG. 4 to the non-operating 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 operating position shown by the solid line in FIG. 4, and gradually decreases as it is turned toward the non-operating position. On the other hand, in the main frame 12, in addition to the elastic biasing force M ₁ by the coil spring 36 as described above, 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 body 12 and the various components attached thereto is different from that of the main frame body 12 when the main frame body 12 is in the operating position shown in FIG. Moment in the counterclockwise direction in the figure (counterclockwise when viewed from the lower right in FIG. 4)
Apply M ₂ = W × l to the main frame 12. This moment M ₂ is
When the main frame body 12 is placed in FIG. 3 from the acting position to the non-acting position and turned clockwise by an angle θ, M
= W × l × cos θ. That is, the main frame 12 gradually decreases as it is swung clockwise from the operating position to the non-operating position in FIG. Then, 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). Coil spring 36 that acts in the direction that makes it turn clockwise when viewed)
Due to the weight W acting in the direction in which the main frame 12 is swung counterclockwise in FIG. 3 (counterclockwise when viewed from the lower right in FIG. 4) rather than the elastic biasing force M ₁ due to Moment M ₂ is larger (M ₂ > M ₁ ) and main frame 12
3 is swung in the clockwise direction in FIG. 3 (clockwise when viewed from the lower right in FIG. 4) from the acting position to the non-acting position by the weight W rather than the degree of decrease in the elastic biasing force M _1. When the degree of decrease in the moment M ₂ is larger and the main frame 12 is turned from the operating position to the non-operating position by a predetermined angle θ ₂ which may be, for example, 50 to 60 degrees, M ₁ = M ₂ ( = W × l × cos θ _s ) and this angle θ
_When the main frame 12 is swung beyond _s toward the non-acting position, M ₁ > M ₂ is set. Therefore, when the main frame 12 is swung from the acting position to the non-acting position over the angle θ _s , the elastic biasing force M ₁ (M ₁ > M ₂ ) of the coil spring 34 is generated. ) Is forced to the non-acting position. Then, when the main frame 12 reaches the non-acting position shown by the chain double-dashed line in FIG. 4, each of the blocks 34 hits the stop piece 40 fixed to each of the pair of side plates 20a and 20b of the main frame 12. Thus, the main frame body 12 is prevented from turning beyond the non-acting position and further turning clockwise as viewed from the lower right side in FIG. On the other hand, the main frame 12
The When allowed to pivot 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 12 is the moment due to the weight W M ₂ (M ₂
> M ₁ ) forcibly positioned and held in the working position.

Next, referring to FIG. 1 to FIG. 3, referring to the configuration of the main frame body 12 itself, the main frame body 12 includes the pair of side plates described above.
An upper plate 42 disposed between the upper edges of 20a and 20b, and a pair of side plates
A lower plate 44 disposed between the lower edges of 20a and 20b. The upper plate 42 defines a substantially flat document receiving surface 46 on the upper surface of the main frame 12. The original receiving surface 46 is provided on the main frame 12 as described later.
Receive originals discharged from inside. On the upper surface of the upper plate 42 which defines the document receiving surface 46, a regulating member 48 for regulating the front edge of the document discharged onto the document receiving surface 46 and aligning the discharged documents.
However, it is preferable that the position is fixed according to the size of the original. The position-adjustable fixing of the regulating member 48 to the upper surface of the upper plate 42 is performed, for example, by forming at least a part of the regulating 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 or the like. Main frame 12
The lower plate 44 which defines the lower surface of the transparent plate 8 is located slightly above and substantially parallel to the transparent plate 8 when the main frame 12 is positioned in the operating position as shown in FIG. The main part 52 of the document transport path 50 is defined between the main part 52 and the upper surface of the document.

In addition to the main part 52, the document transport path 50 has an introduction part 54 located on the upstream side 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 the 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 feeding path 50 is provided between the pair of upright walls 14a and 14b of the support frame 10 described above. It is defined between a lower guide plate 58 and an upper guide plate 60, which are vertically opposed to each other. 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 includes a first portion 62 located on the upstream side and a second portion 64 located on the downstream side.
It is divided into two parts. The first portion 62 of the upper guide plate 60 has a pair of upright walls 14a on both side edges thereof.
And fixed at 14b by fixing to 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 a pin 68 projecting inward in the lateral direction, the position shown by the solid line in FIG. 7-A, that is, in cooperation with the lower guide plate 58, defines the downstream portion of the introduction portion 54. It is mounted so as to be rotatable between an operating position and a position indicated by a chain double-dashed line in FIG. 7-A, that is, a non-operating position for releasing the downstream portion of the introducing portion 54 (see FIG. 7-A and FIG. 5). Figure and Sixth
See also figure). As shown in FIG. 6, pins 70 are further planted on the inner surfaces of the pair of upright walls 14a and 14b, and both of the pins 70 and the side edges of the second portion 64 of the upper guide plate 60. Between the protruding piece 72 formed on the
Is intervened. Such a spring 74 includes a second portion 64 of the upper guide plate 60 shown in solid line in FIG. 7-A, an operating position shown in two-dot chain line in FIG. 6 and a solid line in FIG.
Elastically biased to one of the non-acting positions indicated by the dotted chain line (in other words, the spring 74 has a so-called dead center state in which it is most compressed between the acting position and the non-acting position). ).

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. Seventh-
Referring to FIG. 5 and FIG. 6 together with FIG. A, a connecting piece 78 is projected downward on each of both side portions of one end portion (right end portion in FIG. 7-A) of the lid member 76. And each of the connecting pieces 78 is a pair of upright walls.
Each of the inner surfaces of 14a and 14b is rotatably connected to a pin 80 that is planted on each of the inner surfaces and projects inward in the lateral direction, and thus a lid member 76
Between the closed position shown by the solid line in FIGS. 5 and 7-A and shown by the two-dot chain line in FIG. 6 and the open position shown by the two-dot chain line in FIG. 6 and the solid line in FIG. It is mounted so that it can rotate freely. In the closed position shown by the solid line in FIGS. 5 and 7-A and by the chain double-dashed line in FIG. 6, the free end of the lid member 76 (the left end in FIG. 7-A) is above the main frame 12. One edge of the upper plate 42 (7th
-It is locked to the upper surface of the right edge in FIG. Therefore, the lid member 76 has a grip portion formed at its free end.
It is shown in solid lines in FIG. 6 by gripping 82 and pivoting itself in FIG. 7-A in FIG. 7-A.
In addition to being pushed to the open position shown by the chain double-dashed line in the figure, the main frame body 12 can also be moved to the non-acting position shown by the solid line in FIG. 2 and the two-dot chain line in FIG. Since the lid member 76 associated with the upper plate 42 is pivoted clockwise in FIG. 7-A, it is brought into the open position shown by the solid line in FIG. 6 and the two-dot chain line in FIG. 7-A. A hanging piece 84 is provided on the back surface of the lid member 76, 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 provided.
Are connected to each other by a connecting piece 88 such as a wire, and thus the second portion 64 of the upper guide plate 60 is configured to be pivoted in conjunction with the lid member 76. That is, the lid member
The second portion 64 of the upper guide plate 60 cooperates with the lower guide plate 58 when the 76 is in the closed position shown by the solid line in FIG. 7-A and shown by the alternate long and two short dashes line in FIG. 7 is located at a working position which defines the downstream portion of the cover member 76, the cover member 76 can be pivoted or the main frame 12 can be brought into a non-working position to move the cover member 76 into a two-dot chain line in FIG. 7-A. When the lid member 76 is moved to the open position shown by the solid line in FIG. 6, the second portion 64 of the upper guide plate 60 is shown by the solid line in FIG. It is swung to a non-acting position shown by a two-dot chain line in FIG. 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 put in the non-acting position to close the lid. It will be apparent that the member 76 can be moved to the open position to open the downstream portion of the introduction portion 54 of the document feeding path 50, and thus the jammed document can be easily taken out.

As shown in FIGS. 1, 2 and 7-A, in the illustrated embodiment, a document table 90 is attached to the upstream end side of the support frame 10. As clearly shown in FIG. 7-A, the upper surface of the document table 90 has the introduction portion 54 of the document conveyance path 50 described above.
A document manual positioning guide surface 92 continuing to the upstream end of the document is defined. On the upper surface of the document table 90, as will be mentioned later, the position of one side edge of the document 94 (FIG. 7-A) placed on the document manual positioning guide surface 92 and inserted into the introduction section 54 of the document conveyance path 50 is provided. Guide ridges 96 that regulate and thus regulate the widthwise position of the document 94.
Are formed.

In addition to the introduction section 54 of the document transport path 50 described above,
A pair of introduction conveyance rollers 98 for conveying the original 94 inserted into the main section 52 through the introduction section 54, and a document that protrudes into the introduction section 54 downstream of the introduction conveyance roller pair 98 and passes through the introduction section 54. A first document position regulating member 100 capable of preventing the progress of 94 is provided.

Referring to FIG. 5, FIG. 6, FIG. 7-A and FIG. 7-B, the document 94 is conveyed through the document conveyance path 50 together with the endless conveyance belt and the document guide roller which will be described later. The introduction conveyance roller pair 98 that constitutes the document conveyance mechanism is
It is composed of a driven roller 102 and a driven roller 104.
Referring particularly 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.
At least one driven roller 102 is mounted on the roller 08, and in the illustrated case, four driven rollers 102 are mounted at intervals in the width direction. A suspension rod 110 extending in the width direction is rotatably attached to the pair of upright walls 14a and 14b. Brackets 112 (only one of which is shown in FIG. 5) projecting in the upstream direction are fixed to the vicinity of both ends of the suspension rod 110, and the support shaft 114 rotates between the brackets 112. It is installed freely. And, at least one driven roller 104, which cooperates with the driven roller 102, and four driven rollers 104 spaced apart in the width direction in the illustrated case, are mounted on the support shaft 114. An arm 116 is fixed to one end portion of the suspension rod 110, that is, an end portion that penetrates the upright wall 14b and projects outward in the lateral direction, and the free end portion of the arm 116 has an outer surface of the upright wall 14b. The output end of the solenoid 118 fixed to is rotatably connected. 5 and 7-A
As can be seen from the figure, the driven roller 102 always protrudes downward into the introduction portion 54 of the document feeding path 50 through the notch 120 formed in the first portion 62 of the upper guide plate 60. In a normal state, that is, in a state where the solenoid 118 is deenergized, the driven roller 104 is positioned in 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 swung in the direction indicated by the arrow 122 in FIG. 5, so that the driven roller 104 is moved to the 7-B direction.
As shown in the drawing, it passes through the opening 123 formed in the lower guide plate 58 and protrudes upward into the introduction portion 54 of the document transport path 50 to come into contact with or in the vicinity of the driven roller 102, and the document transport path 50 is reached. If the document 94 is inserted into the introduction section 54, the document 94 is nipped between the driven roller 102. Of course, instead of moving the driven roller 104 to bring the driven roller 102 and the driven roller 104 into contact with or close to each other in the introduction portion 54 of the document transport path 50, the driven roller 102 may be moved if desired. It is also possible to bring the driven roller 102 and the driven roller 104 into contact with or close to each other in the introduction portion 54 of the document conveying path 50 by moving them or by moving both the driven roller 102 and the driven roller 104. As clearly shown in FIG. 5, one end portion of the support shaft 108 on which the driven roller 102 is mounted, that is, an end portion penetrating the upright wall 14a and protruding outward in the lateral direction is
A toothed belt wheel 124 is installed. The toothed belt wheel 124 is connected to an appropriate drive source (see FIG. 11) such as an electric motor arranged in the support frame pair 10 via a timing belt 126. 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 positioned at the operating position shown in FIG. 7-B. If so, the document 94 nipped between the driven roller 102 and the driven roller 104 by the cooperation of the driven roller 104 and the driven roller 104 is not introduced into the introduction portion 54 of the document conveyance path 50.
It is advanced through and sent to the main part 52.

In the illustrated specific example, the first document position restricting member 100 described above includes the suspension rod 11 as shown in FIG.
It is composed of at least one protruding piece fixed to 0, and in the illustrated case, four protruding pieces fixed at intervals in the width direction. First document position regulating member 100 in the illustrated specific example
Is fixed to the suspension rod 110, it is moved by the solenoid 118 integrally with the driven roller 104 of the pair of introducing and conveying rollers 98. When the solenoid 118 is deenergized (thus, when the driven roller 104 is in the non-acting position), the free end of the first document position restricting member 100 is shown in FIGS. 5 and 7-A. As shown, the lower guide plate 58
Through the opening 130 formed in the upper end of the original conveying path 50, and further across the introduction part 54 into the opening 132 formed in the second portion 64 of the upper guide plate 60, thus It is located at a blocking position that blocks the document 94 from passing through the introduction section 54 of the document transport path 50. On the other hand, when the solenoid 118 is energized (thus, the driven roller 104 is positioned at the above-mentioned operating position), the free end portion of the first document position restricting member 100 moves the document as shown in FIG. 7-B. It is located below the lower guide plate 58 after retreating from the introduction section 54 of the path 50, and thus located at a non-blocking position that allows the document 94 to pass through the introduction section 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 introduced into the main part 52 from the introduction part 54 of the document conveying path 50 through the main part 52, and further, the main part. At least one endless conveyor belt 134 for conveying from 52 through the curved lead-out portion 56 and discharging it to the original receiving surface 46, and in the illustrated case, four endless conveyor belts 134 (FIG. 5 and FIG. 5). (See also FIG. 8). As shown in FIG. 5, four rollers 136 are attached to the main shaft 18 at intervals in the width direction. On the other hand, Figs. 8 and 10-
As shown in FIG. A, at the free end of the main frame 12 (that is, the left end in FIG. 3), the support shafts 138 and 140 are rotatably provided between the pair of side plates 20a and 20b of the main frame 12. It is installed. Four rollers 142 (one of which is shown in FIGS. 8 and 10-A) are arranged on the support shaft 138 at intervals in the width direction.
(Only one of which is shown) is mounted on the support shaft 140, and four rollers 144 (the eighth roller) are similarly arranged at intervals in the width direction.
Only one of them is shown in Figures and 10-A). And the above four endless belts
Each of the 134 has a spindle 1 as can be easily understood from FIG.
8 each of the rollers 136 mounted on the support shaft 138, each of the rollers 142 mounted on the support shaft 138, and each of the rollers 144 mounted on the support shaft 140.
Each of the rollers 136 mounted on the main shaft 18 to each of the rollers 142 mounted on the support shaft 138, the main portion 52 of the document transport path 50 (and thus the lower side of the lower plate 44). An operation traveling portion extending therethrough, and an operation extending from the roller 142 attached to the support shaft 138 to the roller 144 attached to the support shaft 140 following the operation traveling portion through the curving lead-out portion 56 of the document conveying path 50. It has a running part and also a non-running running part extending from the roller 144 mounted on the support shaft 140 to the roller 136 mounted on the main shaft 18 through 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 guides each of the endless conveyor belts 134, and the rollers 13
The endless conveyor belt 134 should be sufficiently wound around the contact point 6 with the belt 6. Further, as shown in FIGS. 8 and 10-A, a pair of side plates of the main frame body 12 is adjacent to the support shafts 138 and 140.
A support rod 148 is mounted between 20a and 20b, and four support arms 150 (only one of which is shown in FIGS. 8 and 10-A are spaced apart from each other in the width direction). Is attached so that it can freely rotate. A tension setting roller 152 that acts on each of the endless conveyor belts 134 and sets the tension of each of the endless conveyor belts 134 to a desired value is rotatably attached to each free end of the support arm 150. Has been done. The tension of each of the endless conveyor belts 134 is such that the adjusting screw 154, which penetrates the protrusion formed on the support arm 150 and is screwed to the stationary member 153 located therebelow, is screwed onto the stationary member 153. By adjusting the degree and appropriately adjusting the angular position of each of the support arms 150, and thus the position of the tension setting roller 152, a desired value can be set. Here again the fifth
Explaining with reference to the drawings, one end portion of the main shaft 18, that is, an end portion penetrating the side plate 20a and protruding laterally outward,
The support shaft 1 on which the toothed belt wheel 156 is mounted and also on which the driven roller 102 of the above-described introduction conveyance roller pair 98 is mounted.
In addition to the above toothed belt wheel 124, a toothed belt wheel 158 is further attached to one end portion of 08, 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 wheel 156 and the toothed belt wheel 158. Because it is like this,
The main shaft 18 is connected to the support shaft 108, and thus the support shaft 1
Appropriate drive source such as electric motor through 08 (see Fig. 11)
It will be obvious that it is connected to. When the drive source is energized, the support shaft 108 is rotated in the direction indicated by the arrow 128, as described above, so that the main shaft 18 and the rollers attached thereto are rotated.
136 is also rotated in the direction indicated by the arrow 128, and thus the endless conveyor belt 134 is moved in the direction indicated by the arrow 128.

In the illustrated embodiment, as further illustrated in FIG.
The 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 the substantially middle portion of the document transport path 50 when viewed in the transport direction of the main portion 52. (Only one of them is shown) is fixed. And such a block
A leaf spring 164 is fixed to each of the 162, and a hemispherical pressing piece 166 is fixed to each free end of the leaf 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 an 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 middle portion of the main portion 52 of the document transport path 50, it is endless. Each surface of the transport belt 134 is pressed against the original.

The main portion 52 of the document transport path 50 is further provided with a main portion of the document transport path 50.
A second document position restricting member 168 capable of preventing the document from advancing near the downstream end of 52 and passing through the main portion 52, and a position at which the second document position restricting member 168 prevents the document from advancing. Further, a pressing roller 170 is provided which can press the back surface of each of the endless conveyor belts 134 slightly upstream to bring each surface of the endless conveyor belts 134 into contact with or approach the surface of the transparent plate 8.

Explaining with reference to FIG. 8 and FIG. 10-A, the main frame 12
A suspension rod 172 is rotatably mounted between the pair of side plates 20a and 20b. The second document position restricting member 168 is the suspension rod 1 in the illustrated specific example.
It is composed of one protruding piece fixed to 72 (or a plurality of protruding pieces fixed at intervals in the width direction). 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 passes through the opening 178 formed in the lower plate 44 as shown by a solid line in FIGS. It is located between the 134 and protrudes into the main portion 52 of the original feeding path 50, and thus is positioned at the blocking position for blocking the advance of the original document passing through the main portion 52. As shown in FIG. 10-A, the transparent plate 8 is located at a position where the second document position restricting member 168 prevents the document from advancing.
It is important to be in the vicinity of the leading edge (i.e., the leftmost 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 located at a non-blocking position that allows the document to move forward after retreating from the main portion 52 of the document.

Further, four support arms 182 are fixed to the suspension rod 172 at intervals in the width direction (three of which are shown in FIG. 8).
The above-mentioned pressing roller 170 is rotatably attached to each of the above. 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. Solenoid 176
Is deenergized (hence the second document position regulating member 16
8 is in the blocking position), each of the pressure rollers 170 is positioned above the lower plate 44, as shown by the solid lines in FIGS. 8 and 10-A, and thus the endless conveyor belt.
It is located in a non-acting position that does not act on 134. 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 is attached to the lower plate 44 as shown by a chain double-dashed line in FIG. 10-A. It projects downward through the formed opening 184 and presses 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, and the main portion 52 of the document conveying path 50. When a document (not shown in FIGS. 8 and 10-A) is present at the downstream end of the sheet, each surface of the endless conveyor belt 134 is pressed against the document.

Next, with reference to FIG. 8, FIG. 9 and FIGS. 10-A and 10-B, in the illustrated example, the curved lead-out portion 56 of the document feeding path 50 is formed by the main frame body. 12 pairs of side plates 20a
And 20b are fixed between their free ends by an arcuate guide plate 186. The guide plate 186 is
As clearly shown in FIG. 10-A, the endless conveying belt 134 is located opposite to the rollers 142 and 144 around which the endless conveying belt 134 is wound, and is discharged from the main portion 52 of the document conveying path 50. A document (not shown in FIGS. 8, 9 and 10-A) is guided upward and guided to a document receiving surface 46 defined by the upper surface of the upper plate 42. In the curved leading-out portion 56 of the document feeding path 50, the upstream-side document leading-out roller 18 which is brought into contact with or close to the surface of the endless feeding belt 134 at a position facing the roller 142.
8 and a downstream document guiding roller which is brought into contact with or close to the surface of the endless transport belt 134 at a position facing the roller 144.
190 are provided. Such an upstream document delivery roller 188
Referring to the mounting method of the downstream original guide roller 190, as shown in FIGS. 8 and 9, a suspension rod 192 is rotatably provided between the free ends of the pair of side plates 20a and 20b of the main frame 12. It is installed. A support arm 194 extending downward is fixed to both ends of the suspension rod 192, and a support shaft 196 is rotatably mounted between the support arms 194. Then, four upstream side document leading rollers 188 are mounted on the support shaft 196 at intervals in the width direction. Support arms 198 are further rotatably mounted on both ends of the suspension rod 192, and a support shaft 200 is rotatably mounted between the support arms 198. Further, four downstream side document lead-out 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 supporting arm 194 fixed thereto in the counterclockwise direction when viewed from the lower right in FIG. 8, and thus the supporting shaft 196.
Each of the upstream-side original guide rollers 188 mounted on the guide plate 1
It protrudes into the curved lead-out portion 56 through the opening 204 formed in 86 and is elastically brought into contact with the surface of the endless conveyor belt 134. At the same time, the spring 202 elastically biases the support arm 198 in the clockwise direction when viewed from the lower right side in FIG. 8, thus forming the downstream-side document guiding roller 190 mounted on the support shaft 200 on the guide plate 186. Curved lead-out through the aperture 260
It projects into 56 and is brought into elastic contact with the surface of the endless conveyor belt 134.

In the illustrated example, when the main frame 12 is further moved from the operating position to the non-operating position, the spring 20
The upstream document guide roller 188 is resisted against the elastic biasing action of 2.
And the above-mentioned downstream side document leading roller 190 to the endless conveyance belt 134.
The following mechanism is provided for automatically positioning the working position in contact with the surface of the endless conveying belt 134 to the non-working position separated from the surface of the endless conveyor belt 134. 8 and 9
Referring to the drawings, a projecting piece 208 is fixed to one end of the suspension rod 192, that is, one end projecting laterally outward through the side plate 20b, and the projecting piece 208 is fixed.
Pin 210 is planted in the. 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 slidably supported in the vertical direction by 212 and a pin 214. 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 are fixed to the main frame 12, and an interlocking piece 222 is swingably supported on each of the brackets 220. And
Each 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 shown in FIGS. 8, 9 and 10-A. However, as shown in FIG. 10-B, when the main frame body 12 is lifted from the operating position to the non-operating position, the elastic biasing action of the spring 218 causes the sliding piece 2 to move.
16 is moved downward to a position where the upper end of the elongated slot 224 formed therein abuts the pin 214.
Thus, 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 conveyor 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 interlocking piece 222 is moved to the eighth position by the swing motion of the support arm 194 as described above.
In the drawing, the support arm 198 is swung counterclockwise as viewed from above, whereby the support arm 198 is swung counterclockwise in FIGS. 10-A and 10-B, and thus the downstream side document delivery roller 190 is also an endless transport belt. Guide plate away from the surface of 134
It retracts to the back of 186 to the inoperative position shown in Figure 10-B. As described above, the curved lead-out portion of the document transport path 50
If the document is jammed at 56, simply by lifting the main frame 12 from the working position to the non-working position, the upstream-side document leading roller 188 and the downstream-side document leading roller 190 will move to the 10th-B.
It is automatically positioned in the non-acting position shown so that jammed documents 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.

Referring to FIG. 5, an operation amount detector 228 for detecting the amount of rotation of the support shaft 108, and thus the amount of drive of the introduction conveyance roller pair 98 and the endless conveyance belt 134, is provided. This operation amount detector 228 is a plate to be detected 230 mounted on one end of the support shaft 108 that penetrates the upright wall 14a and projects outward in the lateral direction.
And an optical detector 232 positioned so as to straddle the plate 230 to be detected. The plate 230 to be detected has a plurality of notches 234 formed in the peripheral portion of the plate 230 at intervals in the circumferential direction, and the optical detector 232 is connected to the light emitting element located on one side of the plate 230 to be detected. And a light receiving element located on the opposite side of the detection plate 230. When the detected plate 230 is rotated in accordance with 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, and thus the pair of introduction conveyance rollers 98, can be obtained.
Further, it is possible to detect the drive amount or the operation amount of the endless conveyor belt 134.

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 that detects a document upstream of the position is provided. The first document detector 236, in the illustrated example, is a lower guide plate that defines the introduction portion 54 of the document conveyance path 50.
It is composed of an optical detector having a light emitting element and a light receiving element, which are disposed below 58 and above the second portion 64 of the upper guide plate 60, and has an opening 238 and an upper portion formed in the lower guide plate 58. Through the opening 240 formed in the second portion 64 of the guide plate 60, the introduction section 54 is monitored upstream of the blocking position that blocks the document from moving when the first document position restricting member 100 is in the blocking position, A document passing there 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 transport path 50 is provided. . In the illustrated specific example, the second document detector 242 includes a micro switch 244 disposed on the back surface of the guide plate 186 and an operating piece 246 for the micro switch 244.
The actuating piece 246 rotatably mounted on the pin 248 planted in one of the support arms 198 described above projects into the bending lead-out portion 56 through the opening 250 formed in the guide plate 186. And an actuating portion located opposite to the actuator 252 of the microswitch 244. Such actuating piece 246 is typically the first
Although maintained in the state shown in FIG. 0-A, 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 actuating portion 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 position detector 254 is, in the illustrated specific example, an actuator 2
It consists of a microswitch with 56. 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 formed projecting piece 258 presses the actuator 256 and thus brings it into the first or open state. On the other hand, the main frame 12
Is positioned in the non-acting position shown in FIG. 2 and accordingly the lid member 76 is 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. Is separated from the actuator 256 to be brought into the second state, that is, the closed state. In addition, when the main frame 12 is positioned at the working position, even if the lid member 76 itself is operated to move to the open position, the projecting piece 258 separates from the operating element 256 to cause the second state, that is, the second state. It can be closed.

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

(I) Manual positioning of a document or start of document feeding; (I-i) Preparatory operation; When document feeding and discharging is performed semi-automatically using the document feeding and discharging device 4, FIG. As shown in FIG. 3 and FIG. 3, the main frame 12 is positioned at the working position and the lid member is
Push 76 to the closed position. Thus, the main frame position detector
254 is in the first or open state and its output signal 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 output terminal of the flip-flop FF1 in the reset state is supplied. , From the main frame position detector 254 through the inverter IN1 to the output IN of the flip-flop FF2 in the reset state, and the output signal is "L" from the first document detector 236 from the first document detector 236. Through
A signal "H" is supplied to the AND gate A1 respectively, and thus a signal "H" is generated at the output end of the AND gate A1, and the signal "H" indicates that the document is ready to be fed and discharged.
It is supplied to L1 and the lamp L1 is turned on.

(I-ii) Manual positioning of original; After the lamp L1 is turned on, the original 94 to be copied (No. 7-A)
(Fig.) Is manually placed on the document manual positioning guide surface 92 of the document table 90, and then, with one edge of the document 94 being in contact with the guide ridge 96, the document 94 is advanced and the front part of the document 94 is moved. The document is partially inserted into the introduction portion 54 of the document transport path 50, and thus, as shown in FIG. 7A, the front edge of the document 94 abuts against the first document position restricting member 100 positioned at the blocking position. Bring them closer.

Then, the first document detector 236 detects the document 94 and generates the 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 turned off (this lamp is turned off).
As will be described later, L1 is turned on again when the document 94 is fed and the trailing edge of the document 94 passes the exposed position of the first document detector 236).

(I-iii) Start of document feeding: When the output signal of the first document detector 236 becomes "H" as described above, the signal "H" is supplied to the AND gate A2 and the delay circuit D1. In this case, flip-flop
Since FF3 is in the reset state, the signal "H" is also supplied to the AND gate A2 from the output terminal of the flip-flop FF3, and thus the signal "H" is generated at the output terminal of the AND gate A2, and the output signal "H" is generated. Is supplied to the AND gate A3. The AND gate A3 is also supplied with the signal "H" from the delay circuit D1 after the lapse of a predetermined delay time set by the delay circuit D1, and thus the AND gate A3 generates the output signal "H" at its output end. This output signal "H" is supplied to the AND gate A4 via the OR gate O1. The 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 flip-flopped. FF5 input end C
Supplied to P. Thus, the normal signal "H" is continuously supplied from the main control means of the main body of the electrostatic copying machine (therefore, the input signal "H" is present at the input terminal D of the flip-flop FF5), so that the flip-flop FF5 is set. And the signal "H" is defeated at its output. This signal "H"
Is also 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 generating the signal "H" at the output terminal of the AND gate A5. "H" is a solenoid
It is supplied to 118 to energize 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 positioned at the working position, the introduction conveyance roller pair 98 nips the original 94, and The document position restricting member 100 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 the delay circuit D2.
AND gate after a predetermined delay time set by
The signal "H" is generated at the output terminal of the AND gate A6, and the 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 134 are driven, and thus the feeding of the original document 94 is started, and the original document 94 is fed to the introduction portion 54 and the main portion 52 of the original feeding path 50. Be transported.

(II) Starting or stopping feeding of a document; (II-i) Detection action of the operation amount detector 228;
When the driving of the endless conveyor belt 134 is started, as will be understood from FIG. 5, the operation amount detector 228 rotates in accordance with the rotation amount of the detection target plate 230 of the operation amount detector 228 which rotates together with the support shaft 108. The optical detector 232 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 document or manual document positioning operation abnormality; The document feeding counter C1 starts counting from the time when the driving source is energized and the document feeding is started as described above. , Its first output end X1 is adapted to convey the original 94 by a distance corresponding to the minimum dimension of the original in the conveying direction necessary for the introduction conveying roller pair 98 and the endless conveying belt 134 to normally feed. An output signal “H” is generated at the time when the operation amount is driven (for example, when 20 pulse-shaped signals are counted), and this output signal “H” is supplied to the input terminal CP of the flip-flop FF2. At this point, the size of the original 94 in the conveyance direction is shorter than the minimum size of the original, or the manually positioned original 94 is manually pulled out immediately after that.
When the original detector 236 of FIG. 2 has already stopped detecting the original 94 and the output signal has returned to "L", this output signal "L" is converted into "H" by the inverter IN2 and the flip-flop FF2 outputs the converted signal. It is supplied to the input terminal D. Therefore, the signal "H" is supplied to both the input terminal CP and the input terminal D of the flip-flop FF2.
Is set, and a document jam occurrence signal, that is, a signal "H" is generated at the output end Q thereof. 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) are deenergized (note that 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. Also, flip-flop FF2
The original jam occurrence signal "H" generated at the output end Q of the
Is supplied to a lamp L2 that indicates the occurrence of a document jam and lights this lamp L2, and is also supplied as a clear signal to the main control means of the electrostatic copying machine itself to stop or disable the operation of the electrostatic copying machine itself. To

(II-iii) De-energization of the solenoid 118: As described in (I-iii) above, the feeding of the original document 94 is started and the original document 94 continues to be fed normally, and the trailing edge of the original document 94 is the first original document. 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 signal of the first document detector 236 is “H”.
To "L". Thus, this signal "L" is converted to "H" by the inverter IN2 and the AND gate A7
Is supplied to. At that 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,
Is set. As a result, the output end of the flip-flop FF4 supplied to the AND gate A5 changes from "H" to "L", thereby deenergizing the solenoid 118 and moving the driven roller 104 of the introduction conveyance roller pair 98 to the inoperative position. At the same time as being returned, the first document position restricting member 100 is returned to the blocking position.

Also, 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) Document jam detection until the word edge of the document passes through the first document detector 236; the second output end y ₁ of the document feeding counter C1 is the introduction conveyance roller pair 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 document conveyance direction in which the endless conveyance belt 134 can be manually positioned. A signal "H" is generated and this output signal "H" is supplied to the AND gate A8. At this point, the first document detector 236 detects the document 94 because the document 94 jams before the trailing edge of the document 94 passes the detection position of the first document detector 236. When the output signal "H" is continuously generated and the flip-flop FF5 is set and the signal "H" is generated at the output terminal Q, the flip-flop FF4 is in the reset state. Since 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 supplied to the AND gate A8. Therefore, AND gate
A8 generates a signal "H" at its output, and this signal "H"
Through OR gate O5 to the input terminal P of flip-flop FF2
Supply to R. As a result, the flip-flop FF2 is set, and the document 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.

(II-v) copying step start signal generation of the; third output z ₁ of the document feeding for counter C1 is the leading edge of the document 94 in the as mentioning conveyance of the original 94 after Stopping The second document position regulating member 168 (third
(Fig. 8, Fig. 8 and Fig. 10-A)
Introduce a sufficient amount of operation to transport 94 Transport roller pair 98
The output signal “H” is generated when the endless conveyor belt 134 is driven (for example, when 60 pulse 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-vi) Document feeding stop; the fourth output terminal α ₁ of the document feeding counter C1 is the document 94
Second document position regulating member 168 whose front edge is in the blocking position
A time point when the introduction conveyance roller pair 98 and the endless conveyance belt 134 are driven by an operation amount necessary to convey the original document 94 until a position slightly before (FIGS. 3, 8, and 10-A). The output signal “H” is generated at the time (eg, when 63 pulse-shaped signals are counted). This output signal "H" is the OR gate
Flip-flop FF5 is supplied via O3 to clear flip-flop FF5 and thus de-energize the drive source.
When the drive source is deenergized, the drive 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, the fourth output terminal α of the document feeding counter C1
Instead of deenergizing the drive source by the output signal "H" generated by ₁ , an additional document detector is provided, for example, slightly before the position where the second document position restricting member 168 prevents the document 94 from advancing. When the document detector detects the leading edge of the document 94, the drive source can be deenergized accordingly.

(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 AND gate A9
Is supplied to. Further, since the copy number signal "H" has a pulse shape, it immediately disappears, that is, becomes a signal "L", and this signal "L" is also converted to "H" by the inverter IN4 and supplied to the AND gate A9. Therefore, when the number of copying steps corresponding to the set number of copies is performed, the AND gate A9 generates a 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 time, the output signal of the first document detector 236 is "L", and this output signal "L" is converted to "H" by the inverter IN2 and supplied to the AND gate A7. , The signal "H" from the output terminal Q of the set flip-flop FF5 is also supplied to the AND gate A7, so that the signal "H" is generated at the output terminal of the AND gate A7, and the signal "H" is generated. It is supplied to the flip-flop FF4 and sets the flip-flop FF4. Therefore, the signal "H" is supplied from the output terminal Q of the flip-flop FF4 to the input terminal D of the flip-flop FF6.

Therefore, when the signal "H" is supplied to the input terminal CP of the flip-flop FF6 as described above,
6 is set and a signal "H" is generated at its output Q. Then, this 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. This AND gate A10, signal "H" from the second output terminal y ₂ of the document discharge counter C2 to be described later also supplied, and I do have gates A1
A signal "H" is generated at the 0 output. This signal "H"
Is delivered to solenoid 176, thus energizing solenoid 176. When the solenoid 176 is energized, the 10th-Ath
As shown by the two-dot chain line in the figure, the second document position regulating member 168
Is positioned at a non-blocking position that allows the document 94 to move, and the pressing roller 170 is positioned at an operating position.

The set signal "H" from the output terminal Q of the flip-flop FF6 is also supplied to the OR gate O2. Therefore, after the elapse of the predetermined delay time set by the delay circuit D2, the signal "H" is supplied to the output terminal of the AND gate A6. This signal "H" is generated and supplied to the drive source to energize the drive source. As a result, the endless conveyor belt 134 together with the introduction conveyor roller pair 98 is formed.
Is started to discharge the original 94, and the original 94 is discharged from the main portion 52 of the original conveying path 50 to the original receiving surface 46 (FIG. 1) through the curved lead-out portion 56.

(III-ii) Counting of the document discharge counter C2 starts; When the driving source is energized as described above, (II-
The optical detector 232 of the actuation detector 228 sequentially begins to generate 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. Start counting pulsed signals from detector 232.

(III-iii) Document jam detection until the leading edge of the document reaches the second document detector 242; the first output end x ₂ of the document ejection counter C2 is the document that has been ejected. When the endless conveyor belt 134 is driven by an operation amount corresponding to conveying the original 94 by a distance sufficient for the leading edge of 94 to reach the detection position of the second original detector 242 (for example, a pulse signal). The output signal "H" is generated at the time of counting 20), and this output signal "H" is output to the AND gate A1.
Supply to 1. At this point, the second document detector 242 still detects the document 94 because the document 94 jams before the leading edge of the document 94 reaches the detection position of the second document detector 242. If not, 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, a 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. As a result, the flip-flop FF2 is set, and the document 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) De-energization of the solenoid 176; the second output end y ₂ of the document discharge counter C2 normally generates the signal “H”, but corresponds to the maximum size of the document in the conveyance direction. The signal "H" is set to "L" at the time when the endless conveyor belt 134 is driven by an operation amount corresponding to the start of discharging the original document by a predetermined distance (for example, when 55 pulse signals are counted). . When the signal at the second output end y ₂ of the document discharge counter C 2 becomes “L”, the solenoid 176
Are de-energized, and thus the second as shown by the solid line in FIG. 10-A.
The document position restricting member 168 is returned to the blocking position, and the pressing roller 170 is returned to the non-acting position.

(III-v) Stopping document discharge; the third output end α ₂ of the document discharge counter C ₂ is
Is the maximum dimension in the transport direction, the time when the endless transport belt 134 is driven by an operation amount that can sufficiently discharge the document 94 that has started to be discharged to the document receiving surface 46 (for example, 130 pulse signals). Output signal “H” at the time of counting)
To generate. This output signal “H” is supplied to the flip-flop FF6 via the OR gate O4, and the flip-flop F
Clear F6. As a result, 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”. The second original detector 242 detects the original 94 because the original 94 is jammed before the trailing edge of the original 94 passes through the detection position of the second original detector 242 when the original 94 is generated. When the output signal “H” is continuously generated (in other words, the trailing edge of the document 94 is not yet detected),
This output signal "H" is continuously supplied to the AND gate A12. On the other hand, the third output terminal α ₂ of the document discharge counter C ₂
When the flip-flop FF6 is cleared as described in (III-v) above by the output signal “H” generated by
The output signal “H” is generated at the output terminal of the flip-flop FF6. As a result, the document discharge counter C2 is cleared and the output signal "H" is supplied to the AND gate A12, so that the signal "H" is generated at the output end of the AND gate A12. The signal "H" is an OR gate.
The flip-flop FF2 is set via O5, 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-ii) above is performed.

(IV) When the next document is manually positioned before the start of document ejection: As described in (II-iv) above, when the trailing edge of the document 94 passes the detection position of the first document detector 236, The output signal of the first 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 operated 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.
Is supplied to. 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 4. Therefore, AND gate A4
"H" is generated at the output terminal of the flip-flop FF
5 is supplied to the input terminal CP, and the flip-flop FF5 is set. Then, the feeding of the next manuscript 94 is started as described in (I-iii) above, and then the procedure substantially the same as that described for the previous manuscript 94 is performed. To be done.

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. Also,
The signal “H” is also supplied to the AND gate C13 from the output terminal of the flip-flop FF1 which has been reset. Therefore, the signal “H” is generated at the output of the AND gate A13, and the signal “H” is generated as a copy process start signal via the OR gate O6. It is supplied to the main control means of the electrocopier 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, 5, 6 and 7
-Fig. A) to the open position and take out the jammed document 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 the output signal "H", and this signal "H" is supplied to the input terminal CL of the flip-flop FF1. FF1 is cleared. 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 "H" is generated at the output terminal of the NAND gate N1 and the signal "H" is cleared.
It is supplied to the input terminal D of 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 to start the copying process by the main body of the electrostatic copying machine. 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 to set the flip-flop FF1. Therefore, the output terminal Q of the flip-flop FF1
A signal “H” is generated on the transparent plate 8 manually.
Lamp L3 indicating that there is a document placed on it
Is lit. 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, so that the flip-flop F is
Resetting F5 and therefore manually positioning another document in document feeder and ejector 4 will not energize solenoid 118 and drive source. The above lamp that has been lit
L3 is turned off when the flip-flop FF1 is reset by returning the main frame body 12 to the operating 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.

〔The invention's effect〕

The document feeding and discharging device according to the present invention is configured as described above, and the document feeding mechanism includes a pressing spring member that elastically biases the document pulling roller to the working position when the main frame body is at the working position, and A separating spring member that elastically biases the document lead-out roller to the non-acting position when the frame body is set to the non-acting position, and one end of the separating spring member is copied when the main frame body is at the working position. By being restrained by the upper surface of the machine housing, its elastic biasing action is not transmitted to the original guide roller, and when the main frame is moved to the non-acting position, the restraint of one end by the upper surface of the copying machine housing is released and the elastic biasing is performed. Since the action is transmitted to the document delivery roller and the document delivery roller is elastically biased to the non-acting position against the elastic biasing action of the pressing spring member, the document delivery path is provided with the document delivery path. Is If the main frame is swung to the non-acting position, the separation spring member is released from the constraint by the upper surface of the copier housing, and its elastic biasing action causes the original guide roller to act on the elastic biasing action of the pressing spring member. It works against the non-acting position, and automatically retracts the jammed document. Therefore, the jammed document can be taken out sufficiently easily without damaging it.

[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 at the working position and the document pressing mechanism is positioned at the non-working 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 working position. FIG. 11 is a simplified circuit diagram showing a control circuit for the document feeding and discharging device 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 the document transport path 54 …… Introduction part of the document transport path 56 …… Bending guide part of the 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 Original detector 242 ... second original detector 254 ... main frame position detector

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Zenzo Kawamori 1-2-2 Tamazo, Chuo-ku, Osaka-shi, Osaka Mita Industry Co., Ltd. (56) References JP-A-55-52841 (JP, A) Actual Development Sho 54-184127 (JP, U) Japanese Patent Publication 6-14207 (JP, B2)

Claims (3)

[Claims] 1. A working position for covering the transparent plate and a non-working position for exposing the transparent plate, with an axis extending along one side edge of the transparent plate disposed on the upper surface of the copying machine housing as a center. A main frame mounted rotatably between the main frame, a main part defined between the lower surface of the main frame and the transparent plate when the main frame is positioned at the operating position, and the main part A document transport path having an introduction portion located upstream of the main portion and a curved lead-out portion located downstream of the main portion, and at least one document leading roller disposed in the main frame body. In a document feeding and discharging device including a document feeding mechanism for feeding a document through a path, the document feeding roller has a working position and a working position that act on a document passing through the leading portion of the document feeding path. It is mounted so that it can move between the non-acting position retracted from The document transport mechanism further includes a pressing spring member that elastically biases the document delivery roller to the operating position when the main frame is in the operating position, and the main frame is set to the non-operating position. And a separating spring member that elastically biases the document lead-out roller to the non-operating position, the separating spring member having one end on the upper surface of the copying machine housing when the main frame is in the operating position. Due to the restraint, the elastic biasing action is not transmitted to the original guide roller, and when the main frame is forced to the non-acting position, the restraint of the one end by the upper surface of the copying machine housing is released and the elastic biasing action is performed. Is transmitted to the document leading roller, and the document leading roller is elastically biased to the non-acting position against the elastic biasing action of the pressing spring member. Ejection device. 2. The document feeding and discharging apparatus according to claim 1, wherein the curving lead-out portion extends from the main portion to a document receiving surface defined on the upper surface of the main frame. 3. The document transport mechanism includes at least one endless transport belt which is mounted on the main frame and has an operation running portion that passes through the main portion of the document transport path and the document leading portion. The document feeding and discharging device according to claim 1 or 2, wherein the document leading roller is brought into contact with or close to the surface of the endless transport belt at the working position.