JPH03163468A - Document supplying and ejecting device for copying machine - Google Patents

Abstract

PURPOSE:To satisfy desire for safety by actuating a detector when a main frame provided so that it can freely rotate to an acting position and a non- acting position is situated at the non-acting position and making the action of a document feeding mechanism impossible. CONSTITUTION:A document supplying and ejecting device 4 and an actuation control means for the document feeding mechanism are provided in a copying machine housing 2, and the device 4 is constituted of a still supporting frame 10 and the main frame 12 which feeds a document with the frame 10. The main frame 12 is mounted so that it can freely rotate between the acting position and the non-acting position for opening it to process the document which is jammed in a document feeding path. When the main frame 12 is situated at the non-acting position, the detector 254 is actuated and the action of the document feeding mechanism is made impossible by the actuation control means. Thus, the desire for safety is satisfied without drastically increasing the cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a document feeding and ejecting device for a copying machine, and more particularly, to a document feeding and ejecting device for a copying machine, and more particularly, a device for transferring a document to be copied onto a transparent plate disposed on the upper surface of a copying machine housing. The present invention relates to a document feeding and discharging device that feeds the document to a transparent plate and discharges the document from a transparent plate.

[Prior art]

Japanese Utility Model Publication No. 53-47961 discloses a typical example of a document feeding and ejecting device for a copying machine. This document feeding and ejecting device is centered on an axis extending along one side edge of a transparent plate disposed on the top surface of the copying machine housing, and has an active position that covers the transparent plate and a non-active position that exposes the transparent plate. It has a main frame that is rotatably mounted between the main frame and the main frame.

When the main frame is positioned at the operating position, the main portion of the document conveyance path is defined between the lower surface of the main frame and the transparent plate. The document conveyance path further includes an introduction section located upstream of the main section and a lead-out section located downstream of the main section. A document conveyance mechanism for conveying a document through the document conveyance path and a control means for controlling the operation of this document conveyance mechanism are also provided.

[Problems with conventional technology]

In the above-described document feeding and ejecting device, if the document transport mechanism is activated while the main frame is positioned at the non-operating position, for example, the operator's finger may be caught in the document transport mechanism. There is a risk that such accidents may occur. In addition, it is convenient for at least a part of the document transport path to be freely openable as needed in order to easily dispose of jammed documents there. Even if the document conveyance mechanism is activated when at least a portion of the document conveyance mechanism is opened, there is a risk that an accident such as an operator's finger being caught in the document conveyance mechanism may occur. Therefore, when the main frame is in the non-active position (in other words, when the main frame is not in the active position) and when at least a portion of the document transport path is open, this state must be maintained. It is important to detect this and disable the operation of the document transport mechanism.

However, in order to meet the above requirements, a detector for detecting that the main frame is in the non-operating position and a detector for detecting that at least a portion of the document transport path is open are provided separately. If they were to be arranged separately and detected separately, the cost of detection would increase considerably.

[Problem of invention]

The present invention has been made in view of the above-mentioned facts, and its main technical problem is to satisfy the above-mentioned requirements regarding document feeding and ejection safety without significantly increasing costs.

[Means for solving the invention]

The gist of the solution of the present invention for achieving the above technical problem is to use a detector for detecting the state of the main frame body to also detect the state of at least a part of the document transport path. and disabling the operation of the document transport mechanism when the common detector detects that the main frame is located in the non-operating position or that at least a portion of the document transport path is open. It is.

That is, according to the present invention, centering on the axis extending along one side of the transparent plate disposed on the upper surface of the copying machine housing, there are two positions: an active position that covers the transparent plate and a non-active position that exposes the transparent plate. a main frame mounted so as to be rotatable between positions, and a main part defined between a lower surface of the main frame and the transparent plate when the main frame is positioned at the coughing position; a document transport path having an introduction section located upstream of the main section and a lead-out section located downstream of the main section; a document transport mechanism for transporting the document through the document transport path; and the document transport mechanism. A control means for controlling the operation of the document feeder and ejector, wherein the control means is in a first state when the main frame is in the active position, and the main frame is in the non-active position. a main frame position detector that is in a second state when the main frame position detector is in the second state; and when the main frame position detector is in the second state, operation of the document transport mechanism is disabled;
At least a portion of the document transport path is configured to be openable for processing a jammed document, and the at least part of the document transport path is configured to be openable for handling a jammed document, and when the main frame is in the operating position, Provided is a document feeding and ejecting device characterized in that the main frame position detector is switched to the second state even if the main frame body position detector is opened.

[Action of the invention]

In the document feeding and discharging device of the present invention, both the state of the main frame and the state of at least a portion of the document transport path are detected by the main frame position detector.

When the main frame is placed in a non-operating position or when at least a portion of the document transport path is opened, the main frame position detector detects this and disables the operation of the document transport mechanism. . Thus, safety requirements in document feeding and ejecting devices can be met without significantly increasing manufacturing costs.

[Preferred specific examples of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A more detailed description will now be made with reference to the accompanying drawings, which illustrate an electrostatic copying machine having one embodiment of a document feeding and ejecting apparatus constructed in accordance with the present invention.

Referring to FIGS. 1 and 2, a copying machine housing 2 of an electrostatic copying machine, which may be of a form well known per se, will be described.
is equipped on the top side with a document feeding and ejecting device, generally indicated by the numeral 4, and furthermore, in the illustrated embodiment, with a document holding mechanism 6, which may be of a type known per se.

The document feeding and ejecting device 4 in the illustrated example is a transparent plate 8 (FIG. 3) disposed on the upper surface of the copying machine housing 2.
A stationary support frame 10 attached to the upper surface of the copying machine housing 2 adjacent to one side edge and a working position covering the transparent plate 8 about the axis extending along the one side edge of the transparent plate 8, that is, the first 1> and a non-operating position where the transparent plate 8 is exposed (for example, the position shown in FIG. 2, which is rotated approximately 90 degrees clockwise when viewed from the lower right in FIGS. 1 and 2 from the operative position). The main frame body 12 is equipped with a movable main frame body 12 that is mounted so as to be able to freely rotate between the two positions. On the other hand, the document holding mechanism 6 is
The transparent plate 8 is centered on an axis extending along the other side edge of the transparent plate 8, which extends substantially at right angles to the pivot axis of the main frame 12 at the document feeding and ejection position 4.
an active position (i.e., the position shown in FIG. 2) that covers the transparent plate 8, and a non-active position that exposes the transparent plate 8 (for example, the first
It is mounted so that it can freely rotate between the position shown in FIG. 1, which is rotated approximately 90 degrees when viewed from the upper right in FIG. As will be explained in detail later, when the original to be copied is positioned on the transparent plate 8 using the original feeding and ejecting device 4, the original holding mechanism 6 is turned off as shown in FIG. position, and the main frame 12 of the document feeding and ejecting device 4 is positioned at the operating 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 ejecting device 4 (for example, if the original to be copied is thick like a book, or comparatively thick like a cardboard or metal plate) (if it has high rigidity)
As shown in FIG. 2, the main frame l2 of the document feeding and ejecting device 4 is placed in the non-operating position, the document is placed at a desired position on the transparent plate 8, and then the document holding mechanism is moved. 6
is rotated to the above operating position, and the transparent plate 8 and the document placed thereon are covered by the document holding mechanism 6.

When taking out the original after the copying process is completed, press the original holding mechanism 6.
swivel to the non-operating position.

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

To explain with reference to FIG. 3 together with FIGS. 1 and 2,
As already mentioned, the illustrated document feeding and ejecting device 4 includes:
It includes a stationary support frame lO and a movable main frame 12.

As understood from FIG. 3, the support frame 10 is attached to one end of the top surface of the copy machine housing 2 (in FIG. 3) adjacent to one side edge of the transparent plate 8 fixed to the top surface of the copy machine housing 2. The main frame body 12
is rotatably attached to this support frame lO.

With reference to FIGS. 4 to 6 together with FIG. 3, the support frame 10
To explain how to attach the main frame 12 to the support frame 10, the support frame 10 is made up of a pair of upright walls 14 located at a predetermined distance in the width direction (i.e., the direction perpendicular to the plane of the paper in FIG. 3).
a and 14b, such a pair of upright walls 14a and 1
The main shaft 18 is rotatably mounted between the shafts 4b and 4b by bearing members 16a and 16b. On the other hand, the main frame body 12 has a pair of side plates 20a and 2 positioned at a predetermined interval in the width direction.
0b, and one end of the pair of side plates 20a and 20b is connected to the main shaft 1 via the bearing members 16a and 16b.
The main frame 12 is rotatably connected to the support frame 10 about the central axis of the main shaft 18 extending along one side edge of the transparent plate 8 . The main frame 12 is placed between the pair of upright walls 14a and 14b of the support frame 10 and the pair of side plates 20a and 20b of the main frame 12 at the operating position (i.e., the first
T! The following mechanism is interposed for forcibly positioning and holding it in either one of the position shown in FIG. Mainly referring to FIG. 4, the outer surface of each of the pair of upright walls 14a and 14b of the support frame lO is formed with a short axis 822 that projects outward in the lateral direction. One end of a connecting arm 24 is rotatably connected to each of R22. On the other hand, a pair of brackets 26 and 28 are fixed to the outer surface of each of the pair of side plates 20a and 20b of the main frame 12 at intervals in the longitudinal direction,
A rod 30 is attached to the brackets 26 and 28 and extends therebetween.

The rod 30 is attached to the brackets 26 and 28 as desired, for example by threading a nut 32 into male threads formed at each end thereof extending through holes formed in the brackets 26 and 28. It can be attached to. If desired, one of the two nuts 32 can be formed integrally with the rod 30. A block 34 is attached to the rod 30.
is slidably attached thereto, 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 implanted in the free end of each of the above-mentioned connecting arms 24, and the pin 38 can be 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.

In the mechanism as described above interposed between each of the pair of upright walls 14a and 14b of the support frame body 10 and each of the pair of side plates 20a and 20b of the main frame body l2, the main frame body 12 is When pivoted between the working position shown by the solid line in the figure and the non-working position shown by the two-dot chain line, the free end of the connecting arm 24 connects the pair of main frame members 12 via the bin 38, the block 34 and the rod 30. Since it is connected to the side plates 20a and 20b, the connecting arm 24 is also at the position shown by the solid line in FIG. It can be rotated between the positions shown in . Thus, the pair of side plates 20a and 20b of the main frame body 12 pivot around the main shaft 18, while each of the connecting arms 24 rotates in the upper right direction in FIG. 4 with respect to the main shaft 18. It turns around the short shaft portion 22, which is located at a displacement of . Therefore, as can be easily understood from Figure 4,
The distance between the bracket 26 fixed to each of the pair of side plates 20a and 20b of the main frame body 12 and the free end of the connecting arm 24, and therefore the position relative to the rod 30 depending on the bracket 26 and the free end of the connecting arm 24 The distance between the block 34 to be restrained is the shortest when the main frame 12 is in the active position shown by the solid line in the fourth point, and the distance between the two points ml#IA
It gradually increases in response to being turned toward the non-operating position shown by . Therefore, the coil spring 36, which is interposed between the bracket 26 and the block 34 and acts in the direction of increasing the distance between the block 34 and the bracket 26, moves the main frame 12 into the An elastic biasing force M in a direction that causes the main frame 12 to pivot from the active position shown by the solid line in FIG. , is exerted on the main frame body 12. The elastic biasing force M of the coil spring 36 is greatest when the main frame 12 is in the active position shown by the solid line in FIG. 4, and gradually decreases as it is turned toward the non-active position. On the other hand, in addition to the elastic biasing force M1 as described above due to the coil spring 36, the main frame 12 is subjected to the weight of the main frame 12 and various structural elements attached thereto (these will be mentioned later). Due to this, 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 structural elements attached to it is the 31st! When in the operating position shown in FIG. 3, a moment }Mz=wxl is exerted on the main frame 12 in a counterclockwise direction in FIG. 3 (counterclockwise when viewed from the lower right in FIG. 4). This moment }Mz decreases to M=WX 1 xcoSθ when the main frame body 12 is rotated clockwise by an angle θ from the working position to the non-working position in FIG. That is, as the main frame 12 is rotated clockwise in FIG. 3 from the working position to the non-working position, it gradually decreases. In the illustrated example, when the main frame 12 is in the operating position shown by the solid line in FIGS. 3 and 4, the main frame 12 is moved clockwise in FIG. 3 and from the lower right in FIG. 4. The above-mentioned elastic biasing force M by the coil spring 36 acts in the direction in which the coil spring 36 is intended to rotate clockwise as viewed.
1, the above moment M due to the weight W acting in the direction in which the main frame 12 is to be rotated counterclockwise in FIG. 3 (counterclockwise when viewed from the lower right in FIG. 4).
, is thicker < (M2 >M+), and the main frame body 12 is moved from the working position to the non-working position to the 3rd r! When turning the main frame clockwise (clockwise when viewed from the lower right in FIG. 4) at lJ, the degree of decrease in the moment M2 due to the weight W is greater than the degree of decrease in the elastic bias force M1, and the main frame A predetermined angle θ, which may be, for example, 50 to 60 degrees, directing the body 12 from the working position to the non-working position.
If you turn it by M+ =M* (=Wxj!x
cos θ, and when the main frame 12 is further rotated toward the non-operating position beyond this angle θ1, it is set such that Ml>M*. Therefore, when the main frame 12 is turned from the working position to the non-working position beyond the angle θ, the elastic biasing force Ml by the coil spring 34 (Ml > M2 causes the main frame 12 to become non-working). Forced into position.

When the main frame 12 is in the operating position shown by the two-dot chain line in FIG.
The main frame body 12 contacts the stop pieces 40 fixed to each of the pair of side plates 20a and 20b of 2, and thus the main frame body 12 moves beyond the above-mentioned non-operating position and further rotates clockwise when viewed from the lower right side in FIG. is prevented. On the other hand, when the main frame 12 is turned from the non-operating position to the operating position in the counterclockwise direction when viewed from the lower right in FIG. M, (M2
>Ml) forcibly positions and maintains the above-mentioned operating position.

Next, referring to FIGS. 1 to 3, the structure of the main frame l2 itself will be described. It has a plate 42 and a lower plate 44 disposed between the lower edges of the pair of side plates 20a and 20b. Top plate 42 defines a substantially flat document receiving surface 46 on the top surface of main frame 12 . This document receiving surface 46 receives a document discharged from within the main frame 12, as will be explained later. On the upper surface of the upper plate 42 that defines the document receiving surface 46, there is a regulating member 48 that regulates the front edge of the document discharged onto the document receiving surface 46 and aligns the discharged document. It is preferable that it is fixed so that its position can be adjusted accordingly. The fixing of the regulating member 48 to the upper surface of the upper plate 42 in an adjustable manner can be achieved by, for example, forming at least a portion of the regulating member 48 from a permanent magnet, and applying the magnetic attraction force of the permanent magnet to any part of the upper surface of the upper plate 42. This can be achieved by, for example, fixing the regulating member 48 at this position. Main frame body 12
The lower plate 44 defining the lower surface of the transparent plate 44 is located somewhat above and substantially parallel to the transparent plate 8 when the main frame 12 is positioned in the operating position as shown in FIG. A main portion 52 of the document conveyance path 50 is defined between the upper surface of the document conveyance path 50 and the upper surface of the document conveyance path 50 .

In addition to the main portion 52, the document conveyance path 50 includes an introduction portion 54 located upstream of the main portion 52, and a curved lead-out portion 56 that connects the main portion 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 located at the other end, that is, the free end (the free end) of the main frame 12. (left end in Figure 3).

Figure 5 along with Figure 3. Explaining with reference to FIG. 6 and FIG. 7-A, the introduction portion 54 of the document conveyance path 50 is located vertically opposite to each other between the pair of upright walls 14a and 14b of the support frame 10. The lower guide plate 58 and upper guide plate 6
It is defined between 0 and 0. The lower guide plate 58 is positioned at a predetermined position by fixing each of its side edges 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 desired position by fixing each of its side edges to the pair of upright walls 14a and 14b. On the other hand, the second portion 64 of the upper guide plate 60 has connecting pieces 66 projecting upward from each side of the upstream plate.
is pivotally connected to the bins 68 which are implanted in each of the inner surfaces of the pair of upright walls 14a and 14b and project laterally inward, so that the position shown by the solid line in FIG. 7-A,
That is, an active position that cooperates with the lower guide plate 58 to define the downstream part of the introduction part 54, and a non-operative position that shows the downstream part of the introduction part 54 as shown by the chain double-dashed line in FIG. 7-A. (Please also refer to FIGS. 5 and 6 along with FIG. 7-A). As shown in Figure 6,
Pins 70 are further implanted on the inner surfaces of the pair of upright walls 14a and 14b, and each of the pins 70 and the protruding pieces 72 formed on both side edges of the second portion 64 of the upper guide plate 60 A spring 74 is interposed between the two. It is closed. The spring 74 is shown in its active position in the second portion 64 of the upper guide plate 60 shown in solid lines in FIG. 7-A and in two-dot chain lines in FIG. elastically biased toward either the non-acting position shown by the dot-dashed line (in other words,
The spring 74 has a so-called dead center state in which it is most compressed between the working position and the non-working position.

Corresponding to the fact that the second portion 64 of the upper guide plate 60 is rotatably mounted, a lid member 76 that can be opened and closed is provided above the second portion 64 of the upper guide plate 60. There is. Referring to FIGS. 5 and 6 together with FIG. 7-A, each of both sides of one end portion (the right end portion in FIG. 7-A) of the lid member 76 is provided with a structure that projects downward. Connecting pieces 78 are provided, and each of the connecting pieces 78 is pivotally connected to a pin 80 that is implanted in each of the inner surfaces of the pair of upright walls 14a and 14b and projects laterally inwardly. The lid member 76 is shown in solid lines in FIGS. 5 and 7-A, in a closed position shown in dashed-double lines in FIG. 6, and in an open position as shown in solid lines in FIG. It is mounted so that it can rotate freely between the two. In the closed position shown by solid lines in FIGS. 5 and 7-A and shown by two-dot chain lines in FIG. 6, the free end of the lid member 76 (the left end in FIG. 7-A) The lid member 76 is locked to the upper surface of one edge of the upper plate 42 (the right edge in FIG. In addition to being brought into the open position shown by a solid line in FIG. 6 and shown by a two-dot chain line in FIG. 7-A by rotating the main frame 12 clockwise in FIG. Even if the lid member 76 is placed in the non-operating position shown by the two-dot chain line in FIG. 4, the lid member 76 is rotated clockwise in FIG. The cover member 76 is placed in the open position shown by a solid line in FIG. 6 and shown by a two-dot chain line in FIG. The upper surface is provided with an upright piece 86, and the depending piece 84 and the upright piece 86 are interconnected by a connecting piece 88, such as a wire, so that the second portion 64 of the upper guide plate 60 is interlocked with the lid member 76. That is, when the lid member 76 is in the closed position shown by the solid line in FIG. 7-A and shown by the two-dot chain line in FIG. The portion 64 cooperates with the lower guide plate 58 to guide the introduction portion 5.
However, by rotating the lid member 76 itself or by placing the main frame 12 in the non-operating position, the lid member 7
6 is placed in the open position shown by the two-dot chain line in FIG. 7-A and shown by the solid line in FIG. is pivoted to a non-operating position, shown in solid lines in FIG. 6 and shown in two-dot chain lines in FIG. As described above, if a document jams downstream of the introduction section 54 of the document transport path 50, the lid can be removed by rotating the lid member 76 itself or by placing the main frame 12 in the non-operating position. Once the member 76 is in the open position, the downstream portion of the introduction portion 54 of the document transport path 50 is opened.
Therefore, it will be clear that a jammed document can be easily removed.

Figure 1. As shown in FIG. 2 and FIG. 7-A, in the illustrated example, a document 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 this document table 90 has a document manual positioning guide surface 92 that continues to the upstream end of the introduction section 54 of the document transport path 50 described above.
stipulates.

On the upper surface of the document table 90, the introduction section 5 of the document conveyance path 50 is placed on a document manual positioning guide surface 92, as will be described later.
A guide protrusion 96 is formed to restrict the position of one side edge of the original 94 (FIG. 7-A) inserted into the original 4, and thus to restrict the position of the original 94 in the width direction.

The introducing portion 54 of the document conveying path 50 described above further includes a pair of introducing conveying rollers 98 for conveying the original 94 inserted into the introducing portion 54 to the main portion 52 through the introducing portion 54, and a pair of introducing conveying rollers 98. A first document position regulating member 100 that protrudes into the introducing portion 54 and can prevent the document 94 from advancing through the introducing portion 54 is disposed downstream of the first document position regulating member 100 .

Referring to FIGS. 5, 6, 7-A, and 7-B, the document 94 is conveyed through the document conveyance path 50 together with an endless conveyance belt, a document guide roller, etc., which will be explained later. A pair of introduction conveyance rollers 9 constitutes a document conveyance mechanism for
8 is separated from a driven roller 102 and a driven roller 104.

Particularly referring to FIG. 5, a bearing member 106 is provided between the pair of upright walls 14a and 14b of the support frame 10.
A support shaft 108 is rotatably mounted by a and 106b, and at least one driven roller 102 (in the illustrated case, four driven rollers 102) is mounted at intervals in the width direction.

Further, 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) that protrude in the upstream direction are fixed to each of the vicinity of both ends of the suspension rod 110, and a support shaft 114 is connected between the brackets 112. is rotatably mounted. The driven roller 10 is attached to this support shaft 114.
At least one driven roller 104, in the illustrated case, four driven rollers 104, which cooperate with the driven roller 2, are mounted at intervals in the width direction.

An arm 116 is attached to one end of the suspension rod 110, that is, the end that protrudes laterally outward through the upright wall 14b.
is fixed, and at the free end of this arm 116,
An output end of a solenoid 118 fixed to the outer surface of the upright wall 14b is rotatably connected. Figures 5 and 7-A
As can be seen from the figure, the driven roller 102 always projects downward into the introduction section 54 of the document transport 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 in which the solenoid 118 is deenergized, the driven roller 104 is located at a non-operating position spaced apart from the driven roller 102 and below the lower guide plate 58. However, when the solenoid 118 is energized, the suspension rod 1
10 is pivoted in the direction shown by the arrow 122 in FIG. 5, and the driven roller 104 then passes upwardly through the opening 123 formed in the lower guide plate 58 and into the document transport path 50, as shown in FIG. 7-B. The driven roller 10 protrudes into the introduction part 54 of the
2, and the document transport path 50
If the original 94 is inserted into the introduction section 54 of the roller 102, the original 94 is nipped between the driven roller 102 and the driven roller 102.

Of course, by moving the driven roller 104, the driven roller 102 and the driven roller 104 are moved along the document conveyance path 50.
Alternatively, if desired, the driven roller 102 or both driven roller 102 and slave roller 104 may be moved. The driving roller 102 and the driven roller 104 are connected to the introduction section 5 of the document conveyance path 50.
They can also be brought into contact with or close to each other in 4. Fifth
As clearly shown in the figure, at one end of the support shaft 108 on which the driven roller 102 is mounted, that is, the end projecting laterally outwardly through the upright wall 14a, a toothed belt wheel 124 is provided. is installed. The toothed belt pulley 124 is connected via a timing belt 126 to an appropriate drive source (see FIG. 11) such as an electric motor disposed within the support frame pair 1O. When the drive source is energized, the support shaft 108 and the driven roller 102 attached thereto are rotated in the direction shown by the arrow 128, so that the driven roller 104 is positioned in the operating position shown in FIG. 7-B. driven roller 102 and slave roller 10
The document 94 nipped between the two is moved forward through the introduction section 54 of the document conveyance path 50 and sent to the main section 52 .

In the specific example shown in the figure, at least one first document position regulating member 100 is fixed to the suspension rod 110, as shown in FIG. It is composed of four fixed protruding pieces. Since the first document position regulating member 100 in the illustrated example is fixed to the suspension rod 110, it is moved integrally with the slave roller 104 of the introduction conveyance roller pair 98 by the solenoid 11B. When solenoid 118 is deenergized (therefore, driven roller 104
is in the non-operating position), the free end of the first document position regulating member 100 is inserted into the opening formed in the lower guide plate 58, as shown in FIGS. 5 and 7-A. 130 into the introduction section 54 of the document transport path 50, further crosses the introduction section 54 and enters the opening 132 formed in the second portion 64 of the upper guide plate 60, thus the document transport path 5
It is positioned at a blocking position that prevents the document 94 from advancing through the introduction section 54 of 0. On the other hand, when the solenoid 118 is energized (therefore, the driven roller 104 is positioned at the operating position), the free end of the first document position regulating member 100 is moved as shown in FIG. 7-B. It is retracted from the introduction portion 54 of the path 50 and located below the lower guide plate 58, and thus positioned at a non-blocking position that allows the document 94 to proceed through the introduction portion 54 of the document conveyance path 50.

The illustrated document feeding and ejecting device 4 further conveys the document carried into the main section 52 from the introduction section 54 of the document conveying path 50 through the main section 52, as shown in FIG. 52 through the curved lead-out portion 56 and discharged onto the document receiving surface 46, at least one (in the case shown in the figure, four endless conveyance bells) disposed at intervals in the width direction}1
34 (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 FIG. 8 and FIG. 10-A, at the free end of the main frame 12 (that is, the left end in FIG. 3), a support shaft is provided between the pair of side plates 20a and 2Ob of the main frame 12. 138 and 140 are rotatably mounted. Four rollers 142 are mounted on the support shaft 138 at intervals in the width direction.
(only one of which is shown in FIGS. 8 and 10-A) is mounted on the support shaft 140, and four rollers 144 (an eighth (Only one of them is shown in the figure and Figure 10-A)
is installed. And the above four endless belts 13
As can be easily understood from FIG.
8, each of the rollers 142 attached to the support shaft 138, and each of the rollers 144 attached to the support shaft 140.
an active running section extending through the main portion 52 of the document transport path 50 (and thus under the lower plate 44) from each of the rollers 136 mounted on the support shaft 138 to the roller 142 mounted on the support shaft 138; Subsequently, the rollers 142 mounted on the support shaft 138 to the roller 1 mounted on the support shaft 140
44 through the curved outlet 56 of the document transport path 50, and further between the upper plate 42 and the lower plate 44 from the roller 144 mounted on the support shaft 140 to the roller 136 mounted on the main shaft 18. and an inactive run extending through the. As shown in FIGS. 5 and 7-A, a pair of side plates 20a and 2 of the main frame 12 are adjacent to the main shaft 18.
A guide rod 146 is rotatably mounted between Ob. This guide rod 146 is connected to the endless conveyor belt 134.
to ensure sufficient winding contact of the endless conveyor belt 134 with the rollers 136. Also,
As shown in FIGS. 8 and 10-A, the support shaft 138
A support rod 148 is attached between the pair of side plates 20a and 2Ob of the main frame 12 adjacent to the support rods 140 and 140, and four support arms 150 (FIG. 8) are attached to the support rod 148 at intervals in the width direction. (only one of which is shown in FIG. 10-A) are rotatably mounted. The free end of each of the support arms 150 acts on each of the endless conveyor belts 134, and the endless conveyor belts 13
A tension setting roller 152 is rotatably mounted to set the tension of each of the four parts to a desired value. The tension of each of the endless conveyor belts 134 is determined by the threading of the adjusting screw 154 into the stationary member 153, which passes through the protrusion formed on the support arm 150 and is screwed into the stationary member 153 located below. Adjust the degree of support arm 150
By appropriately adjusting the angular position of each tension setting roller 152, the tension setting roller 152 can be set to a desired value. Referring again to FIG. 5, a toothed belt pulley 156 is attached to one end of the main shaft 18, that is, the end that passes through the side plate 20a and projects laterally outward. The introduction conveyance roller pair 98 mentioned above
In addition to the toothed belt wheel 124, one end of the support shaft 108 on which the driven roller 102 is attached, that is, the end that protrudes laterally outward through the upright wall 14a, is provided with teeth. A belt wheel 158 is attached.

The toothed belt wheel 156 and the toothed belt wheel 158
A timing belt 160 is wound around the belt. As described above, it is clear that the main shaft 18 is connected to the support shaft 108, and is therefore connected to a suitable drive source such as an electric motor (see FIG. 11) via the support shaft 108. Dew.

When the drive source is energized, the support shaft 108 is rotated in the direction shown by the arrow 128 as described above, and therefore the main shaft 18 and the roller 136 attached thereto are also rotated in the direction shown by the arrow 128, thus rotating the endless conveying belt. 134 is arrow 128
It is moved in the direction shown by.

In the illustrated example, as further illustrated in FIG.
Four blocks 162 (as shown in FIG. (only one of which is shown) are fixed. A leaf spring 164 is fixed to each of the blocks 162, and a hemispherical pressing piece 166 is fixed to the free end of each of the leaf springs 164. Each of the suppressing pieces 166 is elastically biased downward by the elastic biasing action of the leaf spring 164, projects downward through an opening formed in the lower plate 44, and presses the back surface of each of the endless conveyor belts 134. The surface of the endless conveyance belt 134 is brought into contact with or close to the surface of the transparent plate 8, so that when a document (not shown in FIG. 3) is present approximately in the middle of the main portion 52 of the document conveyance path 50, Each surface of the endless conveyor belt 134 is pressed against the document.

The main portion 52 of the document conveyance path 50 further includes a document conveyance path 50.
A second document position regulating member 168 that protrudes near the downstream end of the main portion 52 and can prevent the document from advancing through the main portion 52; and the second document position regulating member 168 prevents the document from advancing. A pressing roller 170 is provided at a position slightly upstream from the position where the belt is moved, and is capable of pressing the back surface of each of the endless conveying belts 134 to bring the surface of each of the endless conveying belts 134 into contact with or close to the surface of the transparent plate 8. There is.

Figures 8 and 10-AI! 1, a suspension rod 172 is rotatably mounted between a pair of side plates 20a and 2Ob of the main frame 12.

In the illustrated example, the second document position regulating member 168 is composed of one (or a plurality of protruding pieces fixed at intervals in the width direction) fixed to the suspension rod 172. has been done.

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 this connecting piece 174. When the solenoid 176 is de-energized, the second document position regulating member 168 passes through the opening 178 formed in the lower plate 44 as shown by the solid line in FIG. 8 and FIG. 134 into the main portion 52 of the document transport path 50, and thus the main portion 52
is positioned in a blocking position to prevent the document from advancing through the document. As shown in FIG. 10-A, the position where the second document position regulating member 168 blocks the advance of the document is near the front edge of the transparent plate 8 (i.e., the left edge in FIG. 10-A). is important. On the other hand, when the solenoid 176 is energized, the suspension rod 172 is pivoted in the direction shown by the arrow 180, and the second document position regulating member 168 is moved to the position shown in FIG. 10-A.
As shown by the dotted chain line, it is retracted from the main portion 52 of the document transport path 50 and positioned at a non-blocking position where the document is allowed to advance.

Four support arms 182 are also fixed to the suspension rod 172 at intervals in the width direction (three of which are shown in FIG. 8), and each of the support arms 182 The above-mentioned suppression roller 170 is rotatably mounted on the holder. Therefore, the pressing roller 170 in the illustrated example is moved together with the second document position regulating member 168 by the action of the solenoid 176. When the solenoid 176 is deenergized (therefore, when the second document position regulating member 168 is positioned at the blocking position), each of the pressure rollers 170 is moved by the solid line in FIGS. 8 and 10-A. As shown, it is located above the lower plate 44, and is therefore positioned at a non-active position where it does not act on the endless conveyor belt 134.

On the other hand, the solenoid 176 is energized (therefore, the second document position regulating member 168 is positioned at the non-blocking position).
Then, each of the pressing rollers 170 projects downward through an opening 184 formed in the lower plate 44 as shown by the two-dot chain line in FIG. 10-A, and presses the back surface of the endless conveyor belt 134, thus The surface of the endless conveying belt 134 is brought into contact with or close to the surface of the transparent plate 8, and the main portion 52 of the document conveying path 50 is brought into contact with or close to the surface of the transparent plate 8.
If a document (not shown in FIGS. 8 and 10-A) is present at the downstream end of the conveyor belt 134, each surface of the endless conveyor belt 134 is pressed against the document.

Next, Fig. 8, Fig. 9, Fig. 10-A and Fig. 10-
To explain with reference to Figure B, in the illustrated example,
The curved lead-out portion 56 of the document conveyance path 50 is defined by a guide plate 186 having an arcuate cross section and fixed between the free ends of the pair of side plates 20a and 20b of the main frame 12. As clearly shown in FIG. 10-A, the guide plate 186 is located opposite the rollers 142 and 144 around which the endless conveyance belt 134 is wound, and is located opposite to the rollers 142 and 144 around which the endless conveyance belt 134 is wound. The manuscript carried out from the section 52 (Fig. 8,
(not shown in FIGS. 9 and 10-A) is guided upward and the original receiving surface 4 is defined by the upper surface of the upper plate 42.
Lead to 6. The curved guide portion 56 of the document transport path 50 includes an upstream document lead-out roller 18 that is brought into contact with or close to the surface of the endless transport belt 134 at a position opposite to the roller 142.
8 and the endless conveyor belt 1 at a position facing the roller 144.
A downstream document lead-out roller 190 that is brought into contact with or close to the surface of the document 34 is disposed. Regarding the mounting method of the upstream document guide roller 188 and the downstream document guide roller 190, as shown in FIGS. A suspension rod 192 is rotatably mounted. Support arms 194 extending downward are fixed to both ends of the suspension rod 192, and a support shaft 196 is rotatably mounted between the support arms 194. Four upstream original guide rollers 188 are mounted on this support shaft 196 at intervals in the width direction. Further, support arms 198 are rotatably attached to both ends of the suspension rod 192, and a support shaft 200 is rotatably attached between the support arms 198. Four downstream document guide rollers 190 are mounted on this support shaft 200 at intervals in the width direction. A spring 202 is interposed between each support arm 194 and each support arm 198.

The spring 202 elastically biases the suspension rod 192 and the support arm 194 fixed thereto in a counterclockwise direction when viewed from the lower right in FIG.
Each of the upstream document lead-out rollers 188 mounted on the curved lead-out portion 5 passes through an opening 204 formed in the guide plate 186.
6 and is brought into elastic contact with the surface of the endless conveyor belt 134. At the same time, the spring 202 elastically biases the support arm 198 clockwise when viewed from the lower right side in FIG. It projects into the curved outlet 56 through an opening 206 shaped like , 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 moved from the active position to the non-active position, the upstream document guide roller is moved against the elastic biasing action of the spring 202.
In order to automatically position the roller 188 and the downstream document lead-out roller 190 from the active position where they contact the surface of the endless conveyor belt 134 to the non-operative position where they are separated from the surface of the endless conveyor belt 134, the following steps are taken. A mechanism is attached.

Referring to FIGS. 8 and 9, a projecting piece 208 is fixed to one end of the suspension rod 192, that is, the end projecting laterally outward through the side plate 20b.
A bottle 210 is embedded in this protruding piece 208. On the other hand, a bracket 212 and a pin 214 are fixed to the outer surface of the side plate 20b.
4 supports the sliding piece 216 so as to be slidable in the vertical direction. 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 the brackets 220
An interlocking piece 222 is swingably supported on each of 2-0. Each end of the interlocking piece 222 is connected to the support arm 1.
94 and the other end is connected to a support arm 198.

In such a mechanism, when the main frame body 12 is placed at the operating position, the lower end of the sliding piece 216 that protrudes through the bracket 212 comes into contact with the upper surface of the copying machine housing 2, thereby causing the sliding piece to 216 is maintained in the state shown in FIGS. 8, 9, and 10-A. However, as shown in FIG. 101B, when the main frame 12 is lifted from the working position to the non-working position, the spring 21
8 causes the sliding piece 216 to move downward to a position where the upper end of the elongated slot 224 formed therein abuts the pin 214. In this way, the protrusion 226 formed on the sliding piece 216 can be attached to the bottle 2.
10, thereby causing the suspension rod 192 and the support arm 194 to reach the 10th-AI! I and 10-B, the upstream document lead-out roller is rotated clockwise in FIGS.
The roller 188 is spaced from the surface of the endless conveyor belt 134 and retracted behind the guide plate 186 to a non-active position shown in FIG. 10-B. At the same time, the pivoting movement of the support arm 194 as described above causes the interlocking piece 222 to swing counterclockwise when viewed from above in FIG.
is rotated counterclockwise in FIGS. 10-A and 10-1B, and thus the downstream document lead-out roller 190 is also separated from the surface of the endless conveyor belt 134 and retreated to the back of the guide plate 186. - Inactive position as shown in Figure B. As described above, if a document jams in the curved guide portion 56 of the document conveyance path 50, simply lifting the main frame 12 from the operating position to the non-operating position will clear the upstream document guide roller. roller 188 and downstream document guide roller 190 are the first
It is automatically positioned in the non-active position shown in Figure 0-B, so that jammed documents can be removed very easily.

The illustrated document feeding and ejecting device 4 is further provided with various detectors as described below, which constitute part of the control means for controlling the operation of its various structural elements.

To explain with reference to FIG. 5, the amount of rotation of the support shaft 108,
Therefore, the introduction conveyance roller pair 98 and the endless conveyance belt 134
An actuation amount detector 228 is provided to detect the amount of driving. The actuation amount detector 228 is positioned so as to straddle a detection plate 230 attached to one end of the support shaft 108 that penetrates the upright wall 14a and projects laterally outward. It is monitored by optical detector 232. The detection target plate 230 has a plurality of notches 234 formed at intervals in the circumferential direction on its peripheral edge, and the optical detector 232 has a light emitting element located on one side of the detection target plate 230. It has a light receiving element located on the opposite side of the detection target plate 230. When the detection target plate 230 is rotated in accordance with the rotation of the support shaft 108, the light beam from the light emitting element of the optical detector 232 is received every time the notch 234 of the detection target plate 230 passes the optical detector 232. The light is received by the element, and thus the optical detector 232 generates a pulsed signal. Therefore, by counting the pulse-like signals generated by the optical detector 232, it is possible to detect the amount of rotation of the support shaft 108, and therefore the amount of drive or operation of the pair of introduction conveyance rollers 98 and the endless conveyance belt 134. can.

Further, as shown in FIGS. 3, 5, 6, and 7-A, the first document position regulating member 100 in the introduction section 54 of the document transport path 50 prevents the document from advancing. A first document detector 236 is provided to detect a document upstream of the position. In the illustrated example, the first document detector 236 is located below the lower guide plate 58 defining the introduction section 54 of the document transport path 50 and above the second portion 64 of the upper guide plate 60. 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 are composed of an optical detector having a light emitting element and a light receiving element arranged. , the introduction [54] is monitored upstream of the blocking position where the first document position regulating member 100 blocks the advance of the document when it is in the blocking position, and the document passing therethrough is detected.

Furthermore, the jia figure. Figure 8. Figure 9 and 10-A
As shown in the figure, a second document detector 242 is provided to detect the document at the curved lead-out portion 56 of the document conveyance path 50. In the illustrated example, the second document detector 242 includes a microswitch 244 disposed on the back side of the guide plate 186 and an actuation piece 246 for the microswitch 244. Support arm 1 mentioned above
The actuating piece 246 is rotatably attached to a pin 248 implanted in one side of the guide plate 186, and the actuating piece 246 projects into the curved lead-out portion 56 through an opening 250 formed in the guide plate 186. 244 actuators 252 located opposite to each other. The actuating piece 246 is normally maintained in the state shown in FIG. 10-A, but when a document moving through the curved guide portion 56 comes into contact with the sensing portion, the actuating piece 246 changes as shown in FIG. 10-A. When rotated counterclockwise, the actuating section becomes the actuator 2 of the microswitch 244.
52, thus toggling the microswitch 244.

Furthermore, as shown in FIGS. 3, 5, and 7-A, a main frame position detector 254 is provided. In the illustrated example, the main frame position detector 254 is composed of a microswitch having an actuator 256. The main frame body position detector 254 detects the rear edge of the lid member 76 when the main frame body 12 is positioned at the operating position and the lid member 76 is placed in the closed position, as shown by the solid line in FIG. 7-A. The actuator 25 is
6 is pressed, thus forcing it into the first or open condition. On the other hand, the main frame body 12 is positioned at the non-operating position shown in FIG. 2, and accordingly, the lid member 76 is shown by a solid line in FIG. 6 and at two points ms! in FIG. 7-A. When the actuator is placed in the open position shown by , the protruding piece 258 is removed from the actuator 256, thereby placing the actuator in the second or closed position. Moreover, when the main frame body 12 is positioned at the operating position,
Even if the lid member 76 itself is operated to bring it to the open position, the protrusion piece 258 separates from the actuator 256, thereby bringing it to the second state, that is, the closed state.

Next, with reference also to FIG. 11, which shows a control circuit diagram constituting the control means together with the various detectors 228, 236, 242, and 254 described above, the operation of the document supplying and discharging device 4 as described above will be explained. I will summarize and demystify the effects.

(1) Manual positioning of original or start of original loading; (1-i)
Preparation operation: When feeding and ejecting documents semi-automatically using the document feeding and ejecting device 4, the main frame 12 is positioned at the operating position as shown in FIGS. 1 and 3. At the same time, the lid member 76 is moved to the closed position.

As a result, the main frame position detector 254 enters the first state, that is, the open state, and its output signal becomes "L". and,
At this time, if there is an abnormality in the electrostatic copying machine main body and document feeding/ejecting device 4, such as a copy paper jam in the electrostatic copying machine main body or a document jamming in the document feeding/ejecting device 4, as will be mentioned later. If it has not occurred, a normal signal r is sent from the main control means (1!l not shown) of the electrostatic copying machine main body.
HJ is supplied to the AND gate A1, and from the output terminal Q of the flip-flop FFI in the reset state, from the main frame body position detector 254 through the inverter IN1,
Output terminal Q of flip-flop FF2 in reset state
From the first document detector 236, which does not detect a document and the output signal is "L", through the inverter IN2,
A signal "H" is supplied to each AND gate A1, and thus a signal rHJ is output to the output terminal of the AND gate A1.
This signal rHJ is supplied to the lamp L1 indicating completion of document feeding and ejection preparation, and the lamp L1 is turned on.

(I-■) Manual document positioning: After lamp L1 is lit, the document 94 (7th position) to be copied is
- A) is manually placed on the manual document positioning guide surface 92 of the document table 90, and then one edge of the document 94 is placed on the guide guide surface 96.
The original 94 is moved forward while the original 94 is in contact with the original 94.
The front part of the first document position regulating member 1 is partially inserted into the introduction part 54 of the document conveyance path 50, and the front edge of the document 94 is positioned at the blocking position as shown in FIG. 71A.
Bring it into contact with or close to 00.

Then, the first document detector 236 detects the document 94 and generates a document manual positioning end signal, that is, the output signal becomes rHJ. 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. When the trailing edge of the original 94 passes through the exposed position of the first original detector 236, the light is turned on again).

(J-iii) Start of document feeding; When the output signal of the first document detector 236 becomes "H" as described above, the signal "H" is
and is supplied to the delay circuit D1. At this time, since the flip-flop FF3 is in the reset state, the signal "H" is also sent from the output terminal Q of the flip-flop FF3 to the AND gate A2.
'' is supplied, thus a signal "H" is generated at the output terminal of AND gate A2, and this output signal rHJ is supplied to AND gate A3. Further, the AND game A3 is also supplied with the signal "H" from the delay circuit D1 after a predetermined delay time set by the delay circuit D1 has elapsed, and thus the AND game A3 produces an output signal "H" at its output terminal. . This output signal rHJ is supplied to the AND gate A4 via the gate 01. Also, the output terminal Q of the flip-flop FF4 in the reset state is connected to the AND gate A4.
A signal “H” is also supplied from the AND gate A.
A signal "H" is generated at the output end of 4, and such signal "H"
is supplied to the input terminal CP of the flip-flop FF5.

In this way, since the normal signal rHJ continues to be supplied from the main control means of the electrostatic copying machine main body (therefore, the input signal "H" exists at the manual terminal D of the 7 flip-flop FF5),
Flip-flop FF5 is set and a signal rHJ is applied to its output terminal Q. This signal "H" is supplied to the AND gate A5, and the signal "H" from the output terminal Q of the 7-rip, 7-lop FF4 in the reset state is also supplied to the AND gate A5.
5, thus producing a signal "H" at the output terminal of the AND gate A5, and this signal "H" is supplied to the solenoid 11.
8 and energizes the solenoid 118. When the solenoid 118 is energized in this way, the slave roller 104 of the introduction conveyance roller pair 98 is positioned at the operating position, and the introduction conveyance roller pair 98 moves the document 94 as shown in FIG. 7-B.
At the same time, the first document position regulating member 100 is positioned at a non-blocking position where the document 94 is allowed to advance.

At the same time, the signal "H" from the output terminal Q of the flip-flop FF5 is also supplied to the OR gate 02, and then, after a predetermined delay time set by the delay circuit D2, is supplied to the AND gate A6, and thus the output terminal of the AND gate A6. A signal "H" is generated, and this signal "H" is supplied to the drive source to energize the drive source. When the drive source is energized in this way, the introduction conveyance roller pair 98 and the endless conveyance belt 1
34 is driven, and thus feeding of the original 94 is started.
The document 94 is conveyed through the introduction section 54 and main section 52 of the document conveyance path 50 .

(n) Start of original document feeding to stop of document feeding; (n-i) Detection action of actuation amount detector 228; As described above, the drive source is energized, and the pair of introduction conveyance rollers 98 and the endless conveyance belt 13 are energized.
4 starts, as can be understood from FIG.
The optical detector 232 of the actuation amount detector 228 sequentially generates pulse-like signals in accordance with the amount of rotation of the detected plate 230 of the actuation amount detector 228 that rotates together with the support shaft 108. The signal is supplied to the original feeding counter C1 and the original feeding counter C2.

(II-ii) Detection of insufficient number of documents or manual document positioning operation error; The document feeding counter C1 starts counting from the time when the drive source is energized and feeding of the document 94 is started as described above. , its first output end Xi is connected to the introduction conveyance roller pair 98
and the document 94 by a distance corresponding to the minimum document size in the conveyance direction necessary for the endless conveyor belt 134 to normally convey the document.
The output signal becomes "H" at the point in time when the actuating amount corresponding to the conveyance of the
This output signal “H” is sent to the flip-flop FF.
2 input terminal CP. At this point, the first document detector 236 is detected because the dimension of the document 94 in the conveyance direction is shorter than the minimum document dimension, or because the manually positioned document 94 is immediately pulled out manually. Already manuscript 9
4 is no longer detected and its output signal has returned to "L", this output signal "L" is converted to "H" by inverter IN2 and input terminal D of flip-flop FF2.
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 document jam occurrence signal, that is, the signal "H" is supplied to the output terminal Q of the flip-flop FF2. He is given a life warning. This signal "H" is supplied to flip-flop FF5 via OR gate 03 and to flip-flop FF6 via OR gate 04, clearing 7' flip-flops FF5 and FF6, thus deenergizing the drive source. At the same time, the solenoids 118 and 176 are energized or deenergized when the document jam occurrence signal or the document jam occurrence signal mentioned later is generated. (Regardless of the situation, the patient is always forced to be emasculated.) 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 that indicates the occurrence of a document jam, and lights up this lamp L2. It is supplied as a clear signal to the main control means to stop or disable the operation of the electrostatic copying machine itself.

(II-iii) Deenergization of solenoid 118; above (1-
When the feeding of the original 94 is started as described in iii), the original 94 continues to be fed normally, and the trailing edge of the original 94 passes the detection position of the first original detector 236, the first original is detected. The detector 236 no longer detects the original 94 and generates an original introduction completion signal, that is, the output signal of the first original detector 236 returns from rHJ to "L". Thus, this signal "L"
is converted to "H" by inverter IN2, and A? is supplied to At this time, since the signal rHJ is also supplied to the AND gate A7 from the output terminal Q of the set flip-flop FF5, the signal rHJ is sent to the output terminal of the AND gate AV, and this signal "H
” is supplied to the input terminal PR of the flip-flop FF4,
Flip-flop FF4 is set. Thus,
Flip-flop FF4 supplied to AND gate A5
The output end Q changes from "HJ" to "L", thereby deenergizing the renoid 118, returning the driven roller 104 of the introduction conveyance roller pair 98 to the non-operating position, and preventing the first document position regulating member 100. returned to position.

Further, when the output signal of the first document detector 236 returns from "H" to "L", the lamp L1 is lit again (therefore, it is displayed that it is possible to manually position the next document). ).

(II-iv) Document jam detection until the edge of the document passes the first document detector 236; and output at the time when the endless conveyor belt 134 is driven by an operating amount corresponding to conveying the document 94 by a distance corresponding to the maximum dimension in the conveyance direction of the document that can be manually positioned (for example, at the time when 55 pulse signals are counted) A signal "H" is generated, and this output signal rHJ is supplied to the AND game A8.

At this point, the first document detector 236 detects the document 94 due to the document 94 jamming before the trailing edge of the document 94 passes the detection position of the first document detector 236. If the output signal rHJ continues to be generated, the flip-flop FF5 is set and the signal rHJ is generated at its output terminal Q, and the flip-flop FF4 is in the reset state and its output signal rHJ is generated. Since the signal rHJ is generated at the output terminal Q, the AND game}
A signal "H" is generated at the output terminal of A5, and this signal rHJ is supplied to AND game A8. Therefore, AND gate A8 produces a signal "H" at its output terminal,
This signal "H" is supplied to the input terminal PR of the flip-flop FF2 via the OR gate 05. As a result, flip-flop FF2 is set, and a document jam occurrence signal, ie, signal rHJ, is generated at its output terminal Q.

When such a document jam occurrence signal is generated, the operation described in (II-ii) above is performed.

(I[-v) Generation of a copying process start signal; Even if the conveyance of the original 94 is stopped, the third output terminal 2 of the original feeding counter C1 is output in front of the original 94 as mentioned later. The document 94 is moved to a position where the edge can reach the second document position regulating member 168 (FIG. 3, FIG. 8, and FIG. 10-A) whose edge is in the blocking position.
A pair of conveying rollers 98 are introduced by an amount of operation sufficient to convey the
At the time when the endless conveyor belt 134 is driven (for example, when 60 pulse signals are counted), an output signal "H" is generated. This output signal "H" is supplied via the OR gate 06 to the main control means of the electrostatic copying machine itself as a copying process start signal. Then, in response to this copying process start signal, the required copying process by the electrostatic copying machine itself is started (therefore, in order to start the required copying process by the electrostatic copying machine itself, the electrostatic copying machine itself is There is no need to operate the equipped copy start switch PS (FIGS. 1 and 2).

(n-vi) Document feeding stop; The fourth output end α1 of the document feeding counter C1 is connected to 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 were driven by the amount of operation necessary to convey the original document 94 until it reached a position slightly before the document 68 (FIGS. 3, 8, and 10-A). At a time point (for example, when 63 pulse-like signals have been counted), the output signal rHJ is monitored. This output signal “H”
is supplied to flip-flop FF5 through OR gate 03 to clear flip-flop FF5, thus deenergizing 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 original document 94 is stopped. However, the document 94 continues to move forward due to coasting after the feeding is stopped, and the second document position regulating member 168 whose leading edge is in the blocking position (FIGS. 3, 8, and 10-AI!l) It will stop when it comes into contact with.

If desired, instead of energizing the drive source by the output signal rHJ generated by the fourth output terminal α1 of the document feeding counter C1, for example, the second document position regulating member 168 may be used.
An additional document detector is disposed slightly before the position where the document 94 is blocked from proceeding, and this document detector
When the leading edge of the front edge is detected, the driving source may be de-energized in response to this detection.

(II[) Start of original ejection to end of original ejection; (III-
i) Start of document ejection; When the required copying process by the electrostatic copying machine itself is started by the copying process start signal as explained in (II-v) above, the main control means of the electrostatic copying machine itself is deactivated. Signal rHJ
generate. The inactivation signal r}{J is the number by which the pulse-like copy number signal rHJ generated by the main control means each time the copying process is performed (for example, at the end of the exposure process) matches the set number of copies. It disappears at the time when only 1 is generated, that is, the production start signal becomes "L". Then, the signal "L" is converted into rHJ by the inverter IN3 and supplied to the AND gate A9. In addition, the above-mentioned copy number signal r
Since HJ is in the form of a pulse, it disappears immediately, i.e., the signal becomes "L".
This signal "L" is also converted to rHJ by the inverter IN4 and supplied to the AND gate A9. Therefore, when the copying process is performed the number of times that matches the set number of copies,
AND gate A9 produces a signal "H" at its output terminal,
This signal rHJ is input to the input terminal CP of flip-flop FF6.
supply to.

On the other hand, at this point, the first document detector "L" is converted to rHJ by the inverter IN2 and is supplied to the AND gate A7, and the signal "L" from the output terminal Q of the set flip-flop FF5 is "H" is also supplied to the AND gate AV, so the signal "H" is output to the output terminal of the AND gate A7, and the signal rH
J is supplied to flip-flop FF4 to set flip-flop FF4. Therefore, a signal "H" is supplied from the output terminal Q of the flip-flop FF4 to the input terminal D of the seven flip-flop FF6.

Therefore, as described above, when the signal "H" is supplied to the input terminal CP of the flip-flop FF6, the flip-flop FF6 is set and the signal "H" is generated at its output terminal Q. 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 AIO. This AND gate AIO is also supplied with a signal rHJ from a second output terminal y of a document ejection counter C2, which will be described later, so that the signal rHJ is produced at the output terminal of the AND gate AIO. This signal "H" is sent to solenoid 176, thus energizing solenoid 176. When the solenoid 176 is energized, the 10th-AI! As shown by the two-dot chain line in 1, the second document position regulating member 168
is positioned in an unobstructed position that allows the progression of the
Pressure roller 170 is positioned in the active position.

The signal "H" from the output terminal Q of the set flip-flop FF6 is also supplied to the gate 02, and therefore, after the predetermined delay time set by the delay circuit D2 has elapsed, the signal "H" is sent to the output terminal of the AND gate A6. is generated, and this signal "H" is supplied to the drive source to energize the drive source.

As a result, the driving of the endless conveyor belt 134 together with the introduction conveyance roller pair 98 is started, and the discharge of the document 94 is started, and the document 94 is passed from the main portion 52 of the document conveyance path 50 through the curved lead-out portion 56 to the document receiving surface 46 ( Figure 1).

(■1■) Start of counting by the document ejection counter C2; When the drive source is energized as described above, the operation amount detector 228 optically detects the count as described in (IF-i) above. Vessel 2
32 begins to generate pulsed signals one after another. At the same time, since the flip-flop FF6 is set, the signal supplied from its output terminal Q to the document ejection counter C2 becomes rlJ, so that the document ejection counter C2 is activated by the optical detection of the operation amount detector 228. The pulse-like signals from the device 232 begin to be counted.

(I [I-iii) The leading edge of the document is located at the second document detector 24
Document jam detection until the document jam reaches the second document detector 242; the first output end x2 of the document discharge counter C2 detects when the leading edge of the document 94 that has started to be discharged reaches the detection position of the second document detector 242. When the endless conveyor belt 134 is driven by the amount of operation corresponding to conveying the document 94 a distance sufficient to convey the document 94 (for example, when 20 pulse signals have been counted), the output signal rHJ is generated, and the output signal rHJ is generated. AND game the output signal rHJ}
Supply All. At this point, the leading edge of document 94 is at the second
The original 94 is detected before reaching the detection position of the original detector 242.
The second document detector 242
If the document 94 has not been detected yet, 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 the output signal is converted to "H" by the AND gate A11. is supplied to. Therefore, a signal "H" is generated at the output terminal of AND gate A11, and this signal "H" is generated at the output terminal of AND gate A11.
'' is supplied to the input terminal PR of the flip-flop FF2 via the agate 05. As a result, flip-flop FF2 is set, and a document jam occurrence signal, ie, signal rHJ, is generated at its output terminal Q. When such a document jam occurrence signal is generated, the operation described in (II-ii) above is performed.

(II[-iv) Deenergization of the solenoid 176; The second output terminal y2 of the document ejection counter C2 is normally connected to the signal rH.
J is produced, but at the time when the document is ejected by a distance corresponding to the maximum dimension of the document in the conveying direction, and the endless conveyor belt 134 is driven by an amount of operation corresponding to conveying the document (
For example, when 55 pulse-like signals are counted), the signal "H" is made to become "L". When the signal at the second output terminal y of the document ejection counter C2 becomes "L", the solenoid 1
76 is deenergized, and thus the second document position regulating member 168 is returned to the blocking position and the pressing roller 170 is returned to the non-operating position as shown by the solid line in FIG. 10-A.

(ml-v) Stop document ejection; The third output terminal α2 of the document ejection counter C2 is configured to fully collect the document 94 that has started to be ejected even if the document 94 has the maximum dimension in the conveyance direction. At the point in time when the endless conveyor belt 134 is driven by the amount of operation that allows the discharge to be discharged onto the receiving surface 46 (for example, at the time when 130 pulse-shaped signals are counted), the output signal "H" is detected. This output signal "H" is supplied to the flip-flop FF6 via the OR gate 04, and clears the flip-flop FF6. Thus,
The signal at the output end Q of the flip-flop FF6 becomes rl,J, the drive source is deenergized, and the driving of the endless conveyance belt 134 together with the introduction conveyance roller pair 98 is stopped.

(II[-vi) The trailing edge of the document is the second document detector 242
Detection of original jam until the trailing edge of the original 94 reaches the second original detector 2 at the time when the third output terminal α2 of the original ejection counter C2 generates the output signal rHJ.
Because the document 94 jams before passing the detection position 42, the second document detector 242 continues to detect the document 94 (in other words, it does not yet detect the trailing edge of the document 94). If the output signal "H" continues to be generated, this output signal rHJ continues to be supplied to the AND game AI2. On the other hand, the third output terminal α of the document ejection counter C2
The above (III-v
), when the flip-flop FF6 is cleared as described in ), the output signal "
H" is given a life warning.

As a result, the original discharge counter C2 is cleared and the output signal "H" is supplied to the AND gate A12, so that a signal "H" is generated at the output terminal of the AND gate A12. This signal rHJ is set in flip-flop FF2 via OR gate 05, and thus a document jam occurrence signal, rHJ, is generated at the output terminal Q of flip-flop FF2. When such a document jam occurrence signal is generated, the operation described in (n-ii) above is performed.

(IV) When the next original is manually positioned before the start of original ejection; As mentioned in (I[1iv) above, when the trailing edge of the original 94 passes the detection position of the first original detector 236, The output signal of the first document detector 236 becomes rlJ. However, as described in (I-■) above, if the next document 94 is manually positioned as desired before ejection of the document 94 is started as explained in (II-i) above, As a result, the output signal of the first document detector 236 becomes rHJ again.

Then, this output signal rHJ is applied to the flip-flop FF3.
is supplied to

In such a state, as mentioned in (III-i) above, the main control means of the electrostatic copying machine itself issues an operation start signal by performing the copying process a number of times that match the set number of copies for the original document 94. When rlJ is activated, 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 generating the signal rHJ at its output terminal Q. The signal rHJ outputted to the output terminal Q of the flip-flop FF3 is supplied to the AND gate A4 via the gate 01. Furthermore, when the operation start signal "L" is generated, as mentioned in (III-i) above, the flip-flop FF4 is cleared, and therefore the signal rHJ is generated at the output terminal Q of the flip-flop FF4. This signal rHJ is also supplied to the AND gate 4. Therefore, a signal "H" is output to the output terminal of the AND game A4 and supplied to the input terminal CP of the flip-flop FF5, thereby setting the flip-flop FF5. The feeding of the next document 94 is then initiated as mentioned in (1-iii) above, and this is also followed by a procedure substantially identical to that described for the previous document 94. be done.

On the other hand, the signal rHJ applied to the output terminal Q of the flip-flop FF3 is also supplied to the AND gate A13. Further, the signal "H" is also supplied to the AND gate 13 from the output terminal Q of the flip-flop FFI which has been reset, and therefore the signal "H" is output to the output of the AND gate A13, and the signal "H" is supplied to the output terminal of the AND gate A13. It is supplied as a copying process start signal to the main control means of the electrostatic copying machine itself. Therefore, the copying process for the next document 94 by the electrostatic copying machine main body is started at this point. However, if desired, as in the case of original document 94, the third
It is also possible to start the copying process for the next document 94 by the electrostatic copying machine main body in response to the output signal "H" output from the output terminal 21 of the electrostatic copying machine.

(V) Processing of jammed originals; When the original jam occurrence signal as described above is generated, the main frame 12 is lifted from the working position to the non-working position, or the lid member 76 (third r!A .5, 6, and 7 = A) to the open position, and remove the jammed original if it exists. When the main frame 12 is lifted from the active position to the non-active position or the lid member 76 is placed in the open position, the main frame position detector 254 enters the second state, that is, the closed state, and its output signal becomes rHJ. Thus, the document jam occurrence signal as described above is eliminated.

(VI) When placing the original on the transparent plate 8 manually; When positioning the original to be copied on the transparent plate 8 by manual operation without using the original feeding and ejecting device 4 (
For example, when the original to be copied is thick such as a book, or relatively rigid such as cardboard or a metal plate, the main frame 12 is placed in the non-operating position as shown in FIG. As a result, the main frame body position detector 254 enters the second state, that is, the closed state, and its output signal becomes "H", and this signal "H" is supplied to the manual terminal CL of the flip-flop FFI, thereby causing the flip-flop to flip. Frotub FF1 is cleared. Then, the signal "L" is supplied to the NAND game }Nl from the output terminal Q of the flip-flop FF4 in the reset state, and the signal "L" is supplied from the output terminal of the OR gate 06.
'' is supplied, and therefore a signal ``H'' is generated at the output terminal of the NAND game }Nl, and this signal ``H'' is supplied to the input terminal D of the cleared flip-flop FFI.

Next, the document is manually positioned directly on the transparent plate 8 as desired, and the document holding mechanism 6 is brought into the operating position shown in FIG. After that, the copying process start switch PS (Fig. 1 and 21!I) installed in the electrostatic copying machine main body is activated.
is pressed, thus starting the copying process by the electrostatic copying machine main body. Then, the main control means of the electrostatic copying machine main body generates a deactivation signal "H", and this signal rHJ is supplied to the input terminal CP of the flip-flop FFI, thereby setting the flip-flop FFI. Therefore, the flip-flop F
A signal rHJ is generated at the output terminal Q of the FI, and a lamp L3 that indicates the presence of a document manually placed on the transparent plate 8 is turned on. flip flop FF
The signal rHJ generated at the output terminal Q of I is the OR gate 0
3 to the input terminal CL of the flip-flop FF5 to reset the flip-flop FF5, so that the solenoid 118 and the drive source are energized even if another document is manually positioned in the document feeding and ejecting device 4. It will not be done. The lit lamp L3 is turned off when the seven flip-flops FFI are reset by returning the main frame 12 to the operating position shown in FIG.

Although one specific example of the document feeding and ejecting device constructed according to the present invention has been described above in detail with reference to the accompanying drawings, the present invention is not limited to such specific example.
It is needless to say that various modifications and variations can be made without departing from the scope of the invention.

[Brief explanation of the drawing]

FIG. 1 shows an electrostatic copying machine equipped with an original feeding and ejecting device constructed in accordance with the present invention, with the main frame of the original feeding and ejecting device positioned at the active position and the document holding mechanism at the non-active position. A slope view shown in a positioned state. FIG. 2 is similar to FIG. 1, showing the electrostatic copying machine shown in FIG. 1 with the main frame of the document feeding and ejecting device in the non-active position and the document holding mechanism in the working position. slope view. FIG. 3 is a sectional view of the document feeding and ejecting device shown in FIG. 1. 4th rI! J to 6rlIJ are partial perspective views showing a part of the document feeding and discharging device shown in FIG. 1; FIG. 7-A is a partial sectional view showing a part of the document feeding and ejecting device shown in FIG. Figure 7-B shows the state in which document feeding has started.
A partial sectional view similar to figure A. FIG. 8 is a partial perspective view showing a part of the document feeding and discharging device shown in FIG. 1. FIG. 9 is a partially cutaway side view of the document feeding and ejecting device shown in FIG. 1; FIG. 10-A is a partial cross-sectional view showing a part of the document feeding and ejecting device shown in FIG. 1. FIG. 10-B is a partial 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 ejecting device shown in FIG. 1; 2. Copy machine housing 4. Document feeding and ejection device 6. Document holding mechanism 8. Transparent plate 1 0 ・ ・ 12 ・ ・ 46 ・ ・ 50 ・ ・ 52 ・ ・ 54 ・ ・ 56 ・ ・ 90 ・・ 98 ・ 100 ・ 134 ・ 168 ・ 170 ・ 188 ・ 190 ・ 228 ・ 236 ・ Stationary support frame Main frame Original receiving surface Original transport path Main part of the original transport path Introduction part of the original transport path Curved derivation of the original transport path Pair of document tray introduction conveyance rollers, first document position regulating member, endless conveyance belt, second document position regulating member, pressing roller, upstream document guide roller, downstream document guide port -ra, operation amount detection・First document detector 242 ・・Second document detector 254 ・・Main frame body position detector

Claims (1)

[Scope of Claims] 1. Centering on an axis extending along one side edge of a transparent plate disposed on the upper surface of the copying machine housing, there are an active position that covers the transparent plate and a non-active position that exposes the transparent plate. a main frame mounted so as to be rotatable between positions, and a main part defined between a lower surface of the main frame and the transparent plate when the main frame is positioned at the operating position; a document transport path having an introduction section located upstream of the main section and a lead-out section located downstream of the main section; a document transport mechanism for transporting the document through the document transport path; and the document transport mechanism. A control means for controlling the operation of the document feeder and ejector, wherein the control means is in a first state when the main frame is in the active position, and the main frame is in the non-active position. a main frame position detector that is in a second state when the main frame position detector is in the second state; and when the main frame position detector is in the second state, operation of the document transport mechanism is disabled;
At least a portion of the document transport path is configured to be openable for processing a jammed document, and the at least part of the document transport path is configured to be openable for handling a jammed document, and when the main frame is in the operating position, A document feeding and ejecting device characterized in that the main frame position detector is switched to the second state even if the main frame body position detector is opened. 2. The document feeding and discharging device according to claim 1, wherein the at least part of the document conveyance path is at least downstream of the introduction section. 3. A stationary support frame is provided on the upper surface of the copying machine housing adjacent to the transparent plate, the main frame is rotatably attached to the stationary support frame, and the document transport 3. A document feeding and ejecting device according to claim 2, wherein said introduction portion of said section is defined in said stationary support frame. 4. The introduction portion of the document conveyance path is defined between a lower guide plate and an upper guide plate that are located opposite to each other in the vertical direction, and at least the downstream portion of the upper guide plate is in contact with the lower guide plate. The upper guide plate is mounted on the stationary support frame so as to be rotatable between an active position that defines the introduction part and a non-operative position that opens at least a downstream part of the introduction part. A lid member located above at least a downstream portion of the upper guide plate is attached to be openable and closable, and when the lid member is opened, at least the downstream portion of the upper guide plate is pivoted to the non-operating position. The document feeding and ejecting device described in Section 1. 5. The free end of the lid member is locked to the upper surface of the main frame, and when the main frame is moved from the working position to the non-working position, movement of the main frame is transmitted to the lid member. The main frame position detector is disposed in relation to the lid member, and is switched to the second state when the lid member is opened. The document feeding and ejecting device according to item 4.