JPH03148672A - Original feeding and ejecting device for copying machine - Google Patents

Abstract

PURPOSE:To simultaneously satisfy the mutual demands of a feeding/ejecting device by transmitting small carrying force to an original from an endless belt when the original is fed to an transparent plate and transmitting the large carrying force from the endless belt when the original is ejected. CONSTITUTION:When the original is fed to the transparent plate 8, a pressing roller 170 is situated to an inactive position and the carrying force transmitted to the original from the endless belt 134 is small. Besides, even when the original abuts on an original position regulation member 168 which is situated to an obstructing position, the movement of the original is stopped without causing a wrinkle. When the original is ejected from the plate 8, the roller 170 is set to a pressing position and the carrying force transmitted to the original from the endless carrying belt becomes large. Besides, even when the carrying path of a conduct part 56 is curved, the original is surely ejected.

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 includes a document transport path and an original tg* transport mechanism for transporting the document through the document transport path. The document conveyance path has a main part extending on a transparent plate disposed on the upper surface of the copying machine housing, an introduction part located upstream of the main part, and a lead-out part located downstream of the main part. The document transport mechanism includes at least one endless transport belt having an active run passing through at least a main portion of the document transport path. In order to ensure that the original is fed to the desired position on the transparent plate with sufficient accuracy, there is a blocking position that protrudes at a predetermined portion near the downstream end of the main part of the original transport path to prevent the original from advancing, and the original transport path. Advantageously, a document position regulating member is also provided, which is selectively positioned at a non-blocking position that is retracted from near the downstream end of the main portion of the document and allows the document to advance.

When feeding a document to be copied onto a transparent plate, the document position regulating member is positioned at a blocking position to prevent the document from advancing at a required location, and the document transport mechanism moves the document from the introduction part of the document transport path to the main part. The leading edge of the document conveyed through the transparent plate is brought into contact with the document position regulating member in the blocking position, and the document is thus positioned at a desired position on the transparent plate with sufficient accuracy. When ejecting a document from above the transparent plate, the document position regulating member is positioned at a non-blocking position that allows the document to advance;
The original is ejected from the main part of the original transport path through the lead-out part by the original transport mechanism.

[Problems with conventional technology]

In the document feeding and ejecting device of the above-described configuration, when the document is fed onto the transparent plate and the leading edge of the document is brought into contact with the document position regulating member located at the blocking position, the document feeding and ejecting device is It is important that a relatively small conveying force be transmitted to the document from the endless conveying belt of the mechanism. If excessive conveyance force is transmitted to the document from the endless conveyance belt, the document will continue to advance even after the leading edge of the document has come into contact with the document position regulating member, which may cause wrinkles or other problems in the document. There is a possibility that a problem may occur. On the other hand, when a document is ejected from a transparent plate, a relatively large conveyance force is applied to the document from an endless conveyor belt in order to ensure that the document is ejected through a lead-out section that is often curved. It is important to ensure that the However, conventional document feeding and ejecting devices cannot satisfy both of these conflicting demands.

[Problem of invention]

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

[Means for solving the invention]

The gist of the solution of the present invention for solving the above technical problem is that the document position regulating member in the main part of the document conveyance path presses the back surface of the endless conveyance belt on the upstream side of the position where the document is prevented from advancing. A pressing roller is disposed so as to be movable between an active position where the surface of the endless conveyor belt is brought into contact with or close to the transparent plate and a non-active position where the pressure of the endless conveyor belt is released, and the document is fed onto the transparent plate. When the document position regulating member is positioned at the blocking position to eject the document from the transparent plate, the pressure roller is positioned at the non-operating position. The goal is to ensure that the company is positioned in the best possible position.

That is, according to the present invention, the main part extends on the transparent plate disposed on the upper surface of the copying machine housing, the introduction part located on the upstream side of the main part, and the lead-out part located on the downstream side of the main part. a document conveyance mechanism for conveying a document through the document conveyance path, the document conveyance mechanism including an endless conveyance belt of at least one body having an operative running portion passing through at least the main portion of the document conveyance path; A document position that is selectively positioned at a blocking position where the document protrudes near the downstream end of the main portion of the conveyance path to prevent the document from advancing, and a non-blocking position where the document retreats from near the downstream end of the main portion and allows the document to proceed. In the document feeding and ejecting device including a regulating member and a control means for controlling the operation of the document transporting mechanism and the positioning of the document position regulating member, the document transporting mechanism further includes a control means for controlling the operation of the document transporting mechanism and the positioning of the document position regulating member. an operating position in which the document position regulating member in the main portion of the body presses the back surface of the endless conveyor belt upstream of the position where it blocks the advance of the document to bring the surface of the endless conveyor belt into contact with or close to the transparent plate; a pressing roller mounted so as to be movable between a non-working position and a non-working position where the pressure on the endless conveyance belt is released; when the document position regulating member is positioned in the blocking position, the pressing roller is positioned in the non-working position; There is provided a document feeding and discharging device characterized in that, when the document position regulating member is positioned in the non-blocking position, the pressing roller is positioned in the operating position.

[Action of the invention]

In the document feeding and ejecting device of the present invention, when feeding the document onto the transparent plate, the pressure roller is positioned at a non-acting position, so that no pressure is applied to the endless conveyor belt, and therefore the endless conveyor belt is not pressed. The conveying force transmitted from the belt to the document is relatively small, and when the leading edge of the document comes into contact with the document position regulating member located at the blocking position, the movement of the document is stopped without creating wrinkles or the like in the document. On the other hand, when discharging the document from the transparent plate, the pressure roller is positioned at the operating position, and therefore a pressing action is applied to the endless conveyance belt, and therefore the conveyance force transmitted from the endless conveyance belt to the document is relatively large. The document is sufficiently and reliably ejected even when the ejecting section is cleaned.

[Preferred specific examples of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in further detail to the accompanying drawings, which illustrate an electrostatic copying machine having an 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.
The stationary support frame 10 attached to the upper surface of the copying machine housing 2 adjacent to one side edge and the active position (i.e., the first 1) and an inactive position exposing the transparent plate 8 (for example, as 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.
(i.e., the position shown in FIG. 2) and a non-active position that exposes the transparent plate 8 (for example, from the working position to
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 positioning the original to be copied on the transparent plate 8 using the original feeding and ejecting device 4, the original holding mechanism 6 is moved to the above-mentioned position as shown in Figure j1!1. The main frame 12 of the document feeding and ejecting device 4 is placed in 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) 2), as shown in FIG.
The main frame body 12 of the main frame 12 is placed in the non-operating position, and then the original is placed at a desired position on the transparent plate 8. After that, the original holding mechanism 6 is turned to the above-mentioned working position, and the document is placed on the transparent plate 8 and thereon. The placed original is covered by the original holding mechanism 6.

When taking out the original after the copying process is completed, press the original holding mechanism 6.
The construction of the illustrated document feeding and ejecting device 4 constructed in accordance with the present invention will now be described in detail.

To explain with reference to FIG. 3 together with FIGS. 1 and 2,
The illustrated document feeding and ejecting device 4 is as described above (
It includes a stationary support frame lO and a movable main frame 12.

As can be understood from FIG. The main frame body 1 is attached to the right end ms) in the figure.
2 is rotatably attached to this support frame 10.

The attachment method of the main frame 12 to the support frame IO will be explained with reference to FIGS. 4111 to 6 together with m3111. The main spindle 8 is rotatably mounted between the pair of upright walls 14a and 14b by bearing members 16a and 16b. On the other hand, the main frame body 12 has a pair of side plates 20a and 20b located at a predetermined interval in the width direction, and one end of the pair of side plates 20a and 20b is connected to the main shaft through the bearing members 16a and 16b. 18, and the main frame 12 is thus mounted on the support frame 10 so as to be pivotable about the central axis of the main shaft 18 extending along one side edge of the transparent plate 8. and the pair of upright walls 14a of the support frame l opening.
and 14b and the pair of side plates 20a of the main frame 12.
and 20b, the main frame 12 is forced into either the working position (i.e., the position shown in FIG. 1) or the non-working position (i.e., the position shown in FIG. 2). A mechanism for positioning and holding is provided as follows. Mainly referring to No. 411I, the pair of upright walls 14a and 14b of the support frame 10 are each formed with a short axis aB22 projecting outward in the lateral direction on the outer surface thereof. One end of a connecting arm 24 is rotatably connected to each of the connecting arms 24. 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 body 12 at intervals in the longitudinal direction, and the brackets 26 and 28 have a bracket extending between them. A rod 30 is attached.

The loft 30 is attached to the brackets 26 and 28 as desired, for example, by threading a nut 32 into male threads formed at both ends thereof extending through holes formed in the brackets 26 and 28. can do. 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 laterally outwardly projecting pin 38 is implanted in the free end of each of the above-mentioned connecting arms 24, and by inserting such a pin 38 into corresponding four parts formed in the block 34, The free end of the connecting arm 24 is pivotally connected to the block 34.

In the above-mentioned mechanism 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 12, 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. Because it is connected to the side plates 20a and 20b, the connecting arm 24 can also be pivoted between the position shown in solid lines in FIG. 4 and the position shown in two-dot chain lines. The pair of side plates 20a and 20b of the main frame body 12 pivot around the main shaft 18, while the connecting arm 2
4 pivots around the short shaft portion 22, which is displaced upward and to the right in FIG. 4 with respect to the main shaft 18. Therefore, as can be easily understood from FIG. and the block 34 whose position relative to the rod 30 is restrained 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 pivoted toward the non-operating position shown by the chain line.

Therefore, the bracket 26 and block 3
4, the coil spring 36 acts in the direction of increasing the distance between the block 34 and the bracket 26, and the coil spring 36 moves the main frame 12 from the operating position shown by the solid line in FIG. An elastic biasing force M1 is applied to the main frame 1 in a direction that causes the main frame 12 to pivot toward the non-acting position shown in FIG.
2. 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 above-mentioned elastic biasing force M1 caused by the coil spring 36, the main frame 12 is also affected by the weight of the main frame 12 and various components attached thereto (these will be mentioned later). As a result, the following forces also act. That is, as can be easily understood from FIG. 3, the weight W of the main frame 12 and the various components attached to it is equal to In the figure, counterclockwise (No. 411I)
moment) M2
=Wxl is applied to the main frame I2. This moment M2
decreases to M=WXJXCOSθ when the main frame 12 is rotated clockwise by an angle θ from the operating position to the non-operating position in FIG. That is, main frame body 1
2 gradually decreases as it is rotated clockwise in FIG. 3 from the working position to the non-working position.

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 (from the lower right in FIG. 4). The elastic biasing force M1 by the coil spring 36 that acts in the direction to rotate the main frame 12 counterclockwise in FIG. 3 (as seen from the lower right in FIG. 4) The moment M2 due to the weight W acting in the direction in which the main frame 12 is rotated (counterclockwise) is larger (Mll > Ml), and the main frame 12 is rotated from the working position to the non-working position in the 311I. direction(
When turning clockwise (as seen from the lower right in Fig. 4), the weight W
The degree of decrease in the moment M2 due to (1) is larger (If the main frame body I2 is turned from the working position to the non-working position by a predetermined angle θ2, which may be, for example, 50 to 60 degrees, lvL = Mx (= WXI Xcos t
), ), and when the main frame 12 is further turned toward the non-operating position beyond this angle θ, it is set so that M□>Mz. Because of this, when the main frame body 12 is turned from the working position to the non-working position beyond the above angle θ, - due to the elastic biasing force Ml (NL > Mt) by the coil spring 34. Forced into non-active position.

When the main frame body 12 is in the non-operating position shown by the two-dot chain line in FIG.
0, thus preventing the main frame 12 from further pivoting clockwise as viewed from the lower right side in FIG. 4 beyond the non-operating position. On the other hand, when the main frame body 12 is turned from the non-working position to the working position in a counterclockwise direction when viewed from the lower right in FIG. 4, beyond the above-mentioned angle θ,
The main frame 12 has a moment M2 (M2 > M
l) is forcibly positioned and held in the operating position.

Next, referring to FIGS. 1 to 3 and referring to the structure of the main frame 12 itself, the main frame 12 consists of a Board 42
and a lower plate 44 disposed at the lower edge 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
As will be explained later, receives the document discharged from the main frame 12. 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 regulating member 48 is fixed to the upper surface of the upper plate 42 in a position-adjustable manner by, for example, forming at least a portion of the regulating member 48 from a permanent magnet, and using the magnetic attraction force of the permanent magnet, any part of the upper surface of the upper plate 42 can be fixed. This can be achieved by, for example, fixing the regulating member 48 in position. Main frame body 1
The lower plate 44 defining the lower surface of the transparent plate 2 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 bay leading 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 lO, and the fRdh of the document transport path 50
The lead-out portion 56 is connected to the other end of the main frame 12, that is, the free end (third W
In J, it is defined in the left end part).

5111 along with FIG. Explaining with reference to FIG. 6 and FIG. 7-A, the introduction part 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 lO. between the lower guide plate 58 and the upper guide plate 60. 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 has a first portion 6 located on the upstream side.
It is divided into two parts: 2 and a second part 64 located on the downstream side. The first portion 62 of the upper guide plate 60 has both side edges thereof connected to the pair of upright walls 14a and 14b.
It is positioned in the required position by fixing it to the On the other hand, the second portion 64 of the upper guide plate 60 has a connecting piece 66 projecting upward from each side of the upstream end thereof, and is embedded in each of the inner surfaces of the pair of upright walls 14a and 14b. By being pivotally connected to a laterally inwardly projecting pin 68, the second AI! The position shown by the solid line in I, that is, the operating position that cooperates with the lower guide plate 58 to define the downstream part of the introduction part 54, and the position shown by the two-dot chain line in Figure F, that is, the downstream part of the introduction part 54. (See also FIGS. 5 and 6 in conjunction with FIG. A). As shown in FIG. 6, pins 70 are further planted on the inner surfaces of the pair of upright walls 14a and 14b, and each of the pins 70 and both sides of the second partial row 4 of the upper guide plate 60 A spring 74 is interposed between the protruding piece 72 formed on the edge. The spring 74 is shown in its operating position in the second portion 64 of the upper guide plate 60 shown by a solid line in FIG. 7-A and by a two-dot chain line in FIG. (In other words, the spring 74 has a so-called dead center state in which it is most compressed between the active position and the non-active 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 FIG. 5 and 611I together with FIG. Each of the connecting pieces 78 is rotatably 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 inward, and thus the lid member 76 Figure 5 and Fu A
It is mounted so as to be freely pivotable between a closed position shown by a solid line in the figure and a two-dot chain line in FIG. 6, and an open position shown by a solid line in FIG. 6 and a two-dot chain line in FIG. -Figure 5 and Fu AI
! In the closed position shown by the solid line in I and the two-dot chain line in Fig. 6, the free end of the lid member 76 (the left end in Fig. A)
is engaged with the upper surface of one end edge (the right end edge in FIG. 7-A) of the upper plate 42 of the main frame body 12. Accordingly, the lid member 76 is rotated clockwise in FIG. 611I by gripping the gripping portion 82 formed at its free end and rotating itself clockwise in FIG.
In addition to being placed in the open position shown by the two-dot chain line in the figure, the main frame 12 can also be placed in the non-operating position shown by the solid line in FIG. 2 and shown by the two-dot chain line in FIG. Since the lid member 76 is rotated clockwise in FIG. 7-A along with the top plate 42, it is placed in the open position shown by the solid line in FIG. 6 and shown by the two-dot chain line in FIG. 7-A. A hanging piece 84 is provided on the back surface of the lid member 76, and a hanging piece 84 is provided on the back side of the lid member 76, and
The upper surface of the portion 64 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 connected to the lid member. It is configured to be rotated in conjunction with 76. That is, when the lid member 76 is in the closed position shown by the solid line in FIG. A and shown by the two-dot chain line in FIG. Although the lid member 76 is positioned at the working position that defines the downstream part of the introduction part 54, the lid member 76 can be moved to the position shown in FIG. The 6th WJ is indicated by the dotted chain line.
When the lid member 76 is pivoted to the open position, the second portion 64 of the upper guide plate 60 is moved to the open position shown by the solid line in FIG. The downstream portion of the introduction portion 54 is released by pivoting to the non-operating position shown by . As shown above, the introduction section 54 of the document transport path 50
If a document jams downstream of the cover member 7,
6 itself or by moving the main frame 12 to the non-operating position, the downstream portion of the introduction section 54 of the document transport path 50 is opened, and the jammed document can be removed. It is clear that it can be easily extracted.

As shown in FIG. 1, FIG. 2, and FIG.
0 is attached. jl? - As clearly shown in Figure A, the upper surface of this document table 90Φ is connected to the document transport path 50 described above.
Manual document positioning following the upstream end of the introduction section 54 is provided on the guide surface 9.
2.

On the upper surface of the original platen 90, as will be mentioned later (manual original positioning is placed on the guide surface 92 and the introduction part 5 of the original transport path 50 is placed
A guide protrusion 96 is formed to regulate the position of one side edge of the document 94 (FIG. 1-A) inserted into the document 4, thereby regulating the position of the document 94 in the width direction.

The introduction section 54 of the document conveying path 50 described above further includes a main B, through which the original 94 inserted into the introduction section 54 passes.
a pair of introduction conveyance rollers 98 for conveying the document 94 to the introduction conveyance roller pair 98; and a first document that protrudes into the introduction section 54 downstream of the pair of introduction conveyance rollers 98 and can prevent the document 94 from advancing through the introduction section 54. A position regulating member 100 is provided.

To explain with reference to FIGS. 5, 6, 4A, and 7-8, originals 1 & 94 are conveyed through the document conveyance path 50 together with an endless conveyance belt, a document guide roller, etc., which will be explained later. The introduction conveyance p-ra pair 98 constituting the conveyance mechanism is a device composed of a driven roller 102 and a driven roller 104. Specifically, referring to FIG. and 14b, a support wheel 108 is provided by bearing members 106a and 106b.
is rotatably mounted, and at least one driven roller 102, in the case shown, four driven rollers 102 are mounted at intervals in the width direction on this support wheel 108.

Further, a suspension rod 110 extending in the width direction is rotatably mounted on the pair of upright walls 14a and 14b.

Brackets) 112 (only one of which is shown in No. 51!I) that protrude in the upstream direction are fixed to each of the vicinity of both ends of this suspension rod 110, and between these brackets 112 a support wheel 114 is fixed. is rotatably mounted. At least one driven roller 104 (in the illustrated case, four driven rollers 104 at intervals in the width direction) is mounted on this support shaft 114 to cooperate with the driven roller 102. One end of the suspension rod 110, that is, the upright wall 14b
Arm 1 is attached to the edge that protrudes laterally outward through the
16 is fixed, and the free end of this arm 116 has a solenoid 118 fixed to the outer surface of the upright wall 14b.
The output ends of the two are rotatably connected. Figures 5 and 7
- As can be seen from FIG.
0 and protrudes downward into the introduction g54 of the document conveyance path 50. However, in a normal state, that is, when the solenoid 118 is deenergized, the driven roller 104 is spaced apart from the driven roller 102 and protrudes downward. It is located at a non-operating position below the guide plate 58. However, when solenoid 118 is energized, suspension rod 110 is pivoted in the direction indicated by arrow 122 in FIG.
In this way, the driven roller 104 passes through the opening 123 formed in the lower guide plate 58 and projects upward into the introduction aB54 of the document conveyance path 50, as shown in FIG. 7-B, and comes into contact with or approaches the driven roller 102. When the actuating position is reached and the original 94 is inserted into the introduction B54 of the original conveying path 50, the original 1194 caught between it and the driven roller 102 is nipped. Of course, instead of moving the driven roller 104 so that the driven roller 102 and the driven roller 104 are in contact with or close to each other in the introduction portion 54 of the document transport path 50, if desired, the driven roller 102 may be moved. The driven roller 102 and the driven roller 104 can be brought into contact or close to each other in the introduction section 5-4 of the document conveyance path 50 by moving the driven roller 102 and the driven roller 104, or by moving both the driven roller 102 and the driven roller 104. . As clearly shown in FIG.
2 is attached to one end of the support shaft 10B, that is, the end that protrudes laterally outward through the upright wall 14a.
A toothed belt wheel 124 is attached. 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 10. When the drive source is energized, the support shaft 108 and the driven roller 102 attached thereto are rotated in the direction shown by arrow 128,
Therefore, if the driven roller 104 is positioned at the operating position shown in FIG. It is advanced through the introduction section 54 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. The first document position regulating member 100 in the illustrated example is fixed to the suspension rod 110 and is therefore moved integrally with the driven 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 130 formed in the lower guide plate 58, as shown in FIG. 5 and FIG. Guide the document transport path 50 through! 54 and further traverses the introduction section 54 and enters the opening 132 formed in the second portion 64 of the upper guide plate 60, thus preventing the document 94 from advancing through the introduction section 54 of the document transport path 50. is positioned in a blocking position. 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 aligned with the document conveyance path as shown in FIG. 50 and is located below the lower guide plate 58, and is thus positioned at a non-blocking position that allows the document 94 to proceed through the introduction section 54 of the document transport path 50.

The illustrated document feeding and discharging device [4 further transports the document carried into the main section 52 from the introduction section 54 of the document transport path 50 through the main section 52, as shown in FIG. At least a body (in the illustrated case, four endless conveyor belts arranged at intervals in the width direction) 13 for conveying the document from the main part 52 through the curved lead-out part 56 and ejecting it to the document receiving surface 46
4 (see also FIGS. 5 and 8).

As shown in FIG. 5, four rollers 136 are mounted on the main shaft 18 at intervals in the width direction. on the other hand,
j! As shown in Fig. 8 and No. 10-AwJ (main frame 1
2 (i.e., the left end in FIG. 3), the pair of side plates 20a and 20bfi of the main frame 12
Support shafts 138 and 140 are rotatably mounted on the lll. Four rollers 142 (one of which is shown in FIGS. 8 and 10-A) are attached to the support shaft 138 at intervals in the width direction, and the support shaft 14
0 also has four rollers 144 spaced apart in the width direction.
(only one of which is shown in FIGS. 8 and 10-A) is installed. Each of the four endless belts 134 has a third t! As can be easily understood from I, the rollers 136 mounted on the main shaft 18, the rollers 142 mounted on the support shaft 138, and the rollers 144 mounted on the support shaft 140 are wound around each other. an operating running portion 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 main shaft 18 to the rollers 142 mounted on the support shaft 138; Continuing from this operational traveling section, the curvature of the document conveyance path 50 is extended from the roller 142 attached to the support shaft 138 to the roller 144 attached to the support wheel 140.
a working run extending through 56 and further a support wheel 1;
40 and a non-active running section extending between the upper plate 42 and the lower plate 44 from a roller 144 mounted on the main shaft 18 to a roller 136 mounted on the main shaft 18. No. 5111 and No. 7-A
As shown in the figure, a guide rod 146 is rotatably mounted adjacent to the main shaft 18 and between a pair of side plates 20a and 20b of the main frame 12. The guide rods 146 guide each of the endless conveyor belts 134 and the rollers 136
The wrapping of the endless conveyor belt 134 over the belt ensures sufficient contact. In addition, as shown in Figure jK8 and Figure 10-A, the main frame 1
A support rod 14 is provided between the pair of side plates 20a and 20b of 2.
B is attached to the support rod 148, and four support arms 150 (FIGS. 8 and 10) are mounted on the support rod 148 at intervals in the width direction.
- only one of which is shown in Figure A) is rotatably mounted. A tension setting roller 152 that acts on each of the endless conveyor belts 134 to set the tension of each of the endless conveyor belts 134 to a desired value is rotatably provided at each free end of the support T-mem 150. is installed on. The tension of each of the endless conveyor belts 134 is determined by the tension applied to the stationary member 153 of the adjustment screw 154 that passes through the protrusion formed on the support arm 150 and is screwed into the stationary member 153 located below. By adjusting the degree of threading and suitably adjusting the angular position of each of the support T-arms 150, and therefore the position of the tension setting roller 152, the desired value can be set. Here, referring again to FIG. 5, one end of the main shaft 18,
That is, a toothed belt pulley 156 is attached to the end portion that penetrates the side plate 20a and projects laterally outward, and a support wheel 108 is attached to which the driven roller 102 of the introduction conveyance roller pair 98 described above is attached. In addition to the toothed belt pulley 124, a toothed belt pulley 158 is attached to one end, that is, the end that extends laterally outward through the upright wall 14a.

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 conveyor 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 pressing pieces 166 is elastically biased downward by the elastic biasing action of the leaf spring 1640, protrudes downward through the opening formed in the lower plate 44, and presses the back surface of each of the endless conveyor bells 134 to create an endless The surface of the conveyor belt 1340 is brought into contact with or close to the surface of the transparent plate 80, 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, the endless conveyor belt is brought into contact with or close to the surface of the transparent plate 80. 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 protrudes near the downstream end of the main portion 952 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 pressing roller 170 can press the back surface of each endless conveying belt 134 to bring the surface of each endless conveying belt 134 into contact with or close to the surface of the transparent plate 8.

To explain with reference to FIG. 8 and FIG. 10-A, a suspension rod 1 is connected to a pair of side plates 20a and 20b of the main frame 12
72 is rotatably mounted.

In the illustrated example, the second document position regulating member 168 is a protruding piece (or a plurality of protruding pieces fixed at intervals in the width direction) fixed to the suspension rod 172. A connecting piece 174 is further fixed to the upper surface of the suspension rod 172, and this connecting piece 1
An output end of a solenoid 176 fixed at a predetermined position in the main frame 12 is rotatably connected to 74 . jl2
When the solenoid 176 is deenergized, the document position regulating member 168 passes between the endless conveyor belts 134 through an opening 178 formed in the lower plate 44, as shown by solid lines in FIGS. 8 and 10-A. It protrudes into the main portion 52 of the document transport path 50 at a position where it is positioned at a blocking position to prevent the document from advancing through the main portion 52 . As shown in FIG. 40-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 rotated in the direction shown by the arrow 180, and the second document position regulating member 168 is moved along the document conveyance path 50 as shown by the two-dot chain line at No. 10-A11I. It is retracted from the main 8852 and positioned in a non-blocking position that allows the document 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-described pressure 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 1? As shown by the solid line in the figure, it is located above the lower plate 44, and is therefore positioned at a non-acting 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. The surface of the conveyor belt 134 is covered with a transparent plate 80.
The main portion 885 of the document conveyance path 50 is brought into contact with or close to the surface.
If there is a document (not shown in FIG. 8 and FIG. 10-A) at the downstream end of the endless conveyor belt 134
Press the surface of each onto the document.

Next, j181!1. jf! 9, 10-A, and 10-8, in the illustrated example, the curved lead-out portion 56 of the document conveyance path 50 is formed by the pair of side plates 20a and 20b of the main frame 12. The cross section fixed between the free ends of is defined by an arcuate guide plate 186. As clearly shown in No. 10-A11I, the guide plate 186 is positioned opposite to the rollers 142 and 144 around which the endless conveyance belt 134 is wound, and serves as a main part of the document conveyance path 50. A document (not shown in FIGS. 8, 9, and 10-A) carried out from 52 is guided upward to a document receiving surface 46 defined by the upper surface of upper plate 42. The **leading-out portion 56 of the document transport path 50 includes an upstream document lead-out roller 18B that contacts or approaches the surface of the endless transport belt 1340 at a position facing the roller 142, and an endless transport belt 1340 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 is provided. The upstream document outlet-5188 and the downstream document outlet-51
90, as shown in FIGS. 8 and 9, a pair of side plates 2-Oa and 20 of the main frame 12 are attached.
A suspension rod 192 is rotatably mounted between the free ends of b. 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 19G 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 18B 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 1340. At the same time, the spring 202 elastically biases the support arm 198 clockwise when viewed from the lower right side in FIG. It protrudes into the curved lead-out portion 56 through the opening 206 , and is brought into elastic contact with the surface of the endless conveyor belt 134 .

In the specific example shown, when the main frame 12 is further moved from the active position to the non-active position, the upstream document lead-out roller 188 and the downstream side In order to automatically position the document guide roller 190 from an active position in which it contacts the surface of the endless conveyance belt 134 to a non-operational position where it is separated from the surface of the endless conveyance belt 134, the following mechanism is provided.

Referring to FIG. 8111 and FIG. 9, 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. A bottle 210 is installed in the piece 208. On the other hand, a bracket 212 and a bottle 214 are fixed to the outer surface of the side plate 20b, and a sliding piece 216 is supported by the bracket 212 and bottle 214 so as to be slidable in the vertical direction. The upper end of the sliding piece 216 and the bracket 212
A coil spring 218 that elastically biases the sliding piece 216 downward is stretched between the sliding piece 216 and the sliding piece 216. Further, a pair of brackets 220 are fixed to the main frame body 12, and an interlocking piece 222 is swingably supported on each of the brackets 220. Each end of the interlocking piece 222 is connected to a support arm 194, and the other end is connected to a support T-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. 10-8, 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 bottle 214. In this way, the protrusion H226 formed on the sliding piece 216
10, thereby causing the suspension rod 192 and support arm 194 to pivot clockwise in FIGS.
88 is separated from the surface of the endless conveyor belt 1340 and retracted to the back of the guide plate 186 to be in the non-operating position shown in FIG. 10-8. 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. 8, thereby causing the support arm 198 to swing as shown in FIGS. 10-8, and the downstream document lead-out roller 190 is also separated from the surface of the endless conveyor belt 134 and placed behind the back of the guide plate 186, to the inactive position shown in FIG. 10-8. Therefore, if a document jams in the bay guide portion 56 of the document transport path 50, the upstream document can be guided out by simply lifting the main frame 12 from the working position to the non-working position. The roller 188 and the downstream document lead-out roller 19G are the 10th-
Bt! It is automatically positioned in the inactive position shown at I, so that jammed documents can be removed very easily.

The illustrated document feeding and ejecting device 4 is further provided with the following various detectors forming part of the control means for controlling the operation of its various components.

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 consists of an optical detector 232. The plate to be detected 230 has a plurality of notches 234 formed at intervals in the circumferential direction on its periphery, and the optical detector 232 is connected to a light emitting element located on one side of the plate to be detected 230. and a light receiving element located on the opposite side of the detection 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. .

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 fine feed path 50 prevents the document from advancing. A first document detector 236 is provided to detect a document upstream of the position where the document is detected. 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. It is composed of an optical detector having a light emitting element and a light receiving element disposed, and through an opening 238 formed in the lower guide plate 58 and an opening 240 formed in the second part 64 of the upper guide plate 60, When the first document position regulating member 100 is at the blocking position, the introducing section 54 is monitored upstream of the blocking position where the advance of the document is blocked, and the document passing therethrough is detected.

Furthermore, No. 31!1. 81st! I, Figures 9 and 10-A
As shown in the figure, the original is detected at the curved guide portion 56 of the original transport path 50! Two document detectors 242 are provided. 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
An actuating piece 246 rotatably attached to a pin 248 implanted in one side of the guide plate 186 is connected to a sensing portion and a micro switch 244 that protrude into the curved lead-out portion 56 through an opening 250 formed in the guide plate 186. It has an actuating part located opposite to the actuator 252 of. 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. As shown by the solid line in FIG. 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. When I is placed in the open position shown by the two-dot chain line, the protruding piece 258 separates from the actuator 256, thereby placing it in the second state, that is, the closed state. Further, even if the lid member 76 itself is operated to move to the open position when the main frame body 12 is positioned at the operating position, the protruding piece 258 is detached from the actuator 256, thereby returning to the second state, that is, the operating element 256. Forced to close.

Next, with reference 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 and effect of the document feeding and discharging device 40 as described above will be explained. I will summarize and explain.

(1) Manual document positioning to document feeding: (I-i)
Preparation operation: When the document feeding and ejecting device 4 is used to semi-automatically feed and eject a document, 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 jll state, that is, the open state, and its output signal becomes "L". At this time, the electrostatic copying machine main body and the document feeding and ejecting device 4
If there is no abnormality such as a copy paper jam in the electrostatic copying machine main body or a document jam in the document feeding and ejecting device 4 as mentioned later, the main control means of the electrostatic copying machine main body (not shown) to normal signal rH
J 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, and from the output terminal Q of the flip-flop FF2 in the reset state, the original is not detected and the output signal is “L”.
A signal "H" is supplied from the document detector 236 of the document detector 236 to the respective controllers A1 through the inverter IN2, and thus a signal rHJ is generated at the output end of the controller A1, and this signal rHJ indicates that the preparation for document feeding and ejection is complete. The lamp L1 is turned on.

(1-11) Manual document positioning: After the lamp Ll is turned on, the document 94 to be copied (Figure F) is manually placed on the guide surface 92 of the document table 90, and then Manuscript 940 Guide one edge draft 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 thus the front edge of the document 94 is positioned at the blocking position as shown in FIG.
Bring it into contact with or close to 00.

As a result, the first document detector 236 detects the document 94 and generates an end signal for manual document positioning, that is, the output signal becomes rHJ. Therefore, the signal supplied from the first document detector 236 to the computer AI through the inverter IN2 becomes "L", and the lamp L1 is turned off. When the document 94 is fed and the trailing edge of the document 94 passes the current position of the first document detector 236, the light is turned on again).

(I-iii) Start of document feeding: When the output signal of the first document detector 236 becomes "H" as described above, the signal "H"
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 producing a signal rHJ at the output of the computer A2, and this output signal rHJ is supplied to the computer A3. Further, the AND gate A3 is also supplied with the signal rHJ from the delay circuit D1 after a predetermined delay time set by the delay circuit D1 has elapsed, and the AND gate A3 generates an output signal "H" at its output terminal. This output signal rH,,1 is supplied to the AND gate A4 via the OR gate 01.
The signal "HJ" is also supplied from the output terminal Q of the flip-flop FF4 which is in the reset state, and thus the signal "rHJ" is generated at the output terminal of the AND gate A4.
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 input end of the flip-flop FF5), the flip-flop FF5 is set. 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 flip-flop FF4 in the reset state is also supplied to the AND gate A5. This signal "H" is supplied to the solenoid 118 to energize the solenoid 118. Thus, when solenoid 118 is energized, No. Bl!
As shown in I, the driven roller 10 of the introduction conveyance roller pair 98
4 is positioned at the operating position and the pair of introduction conveyance rollers 98 nip the original 94, and the first original position regulating member 100 is positioned at the non-blocking position where the original 94 is allowed to advance.

At the same time, the signal rHJ from the output terminal Q of the flip-flop FF5 is also supplied to the OR game) 02, and then after a predetermined delay time set by the delay circuit D2, is supplied to the ANTO game) A6, and thus the output of the ANTO game) A6. A signal "H" is generated at the end, and this signal rHJ 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 original 94 is conveyed through the introduction section 54 and main section 52 of the original photographing and transporting path 50 .

(II) Original feeding start to original feeding stop knee (IF-i)
) Detection action of the operating amount detector 228: When the drive source is energized as described above and the driving of the introduction conveyance roller pair 98 and the endless conveyance belt 134 is started, as can be understood from FIG. Actuation amount detector 228 rotating together with 108
According to the rotation amount of the detected plate 2300, the operating amount detector 22
Eight optical detectors 232 sequentially generate pulsed signals and supply the pulsed signals to document feed counter C1 and document feed counter C2.

(IF-ii) Detection of operation error due to insufficient number of originals or manual positioning of originals: The original feeding counter C1 starts counting from the time when the drive source is energized and feeding of the original 94 is started as described above. and its first output end Xt is connected to the introduction conveyor 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" when the actuation amount corresponding to the conveyance of the
This output signal rHJ 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 Hara [9
4 is no longer detected and the output signal returns to "L", this output signal "L" is converted to rHJ by the inverter IN2 and supplied to the input end of the flip-flop FF2. Therefore, the signal r)[4 is supplied to both the input terminal CP and the input terminal of the flip-flop FF2, and 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. is generated. This signal rHJ is supplied to the flip-flop FF5 via the OR gate 03, and also to the OR gate 04.
is supplied to flip-flop FF6 via When a document jam occurrence signal or a document jam occurrence signal to be mentioned later is generated, the document feed counter C1 is always put into the deenergized state regardless of whether it is in the energized state or in the deenergized state.) At the same time, the document feeding counter C1 Also, the document jam occurrence signal rHJ generated at the output terminal Q of the flip-prop FF2 is supplied to the lamp L2 that indicates the occurrence of a document jam and turns on this lamp L2. The clear signal is supplied to the main control means of the electrostatic copying machine to stop or disable the operation of the electrostatic copying machine itself.

(If-iii) Deenergization of solenoid 118: Above (
The feeding of the original 94 is started as described in I-ii), the original 94 continues to be fed normally, and when the trailing edge of the original 94 passes the detection position of the first original detector 236, the first The original 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 "H" to "L". Thus, this signal “L
" is converted to "H" by the inverter IN2 and is supplied to the computer (game) AT. 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, a signal "H" is generated at the output terminal of the AND gate AV.
H'' is supplied to the input terminal PR of the flip-flop FF4, and the flip-flop FF4 is set. Thus, the flip-flop FF supplied to the AND gate A5
The output end Q of No. 4 changes from "H" to [LJ, thereby deenergizing the solenoid 118, returning the driven roller 104 of the introduction conveyance roller pair 98 to the non-operating position, and moving the first document position regulating member 100. Returned to blocking position.

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

(II-iv) Detection of a document jam until the document record passes the first document detector 236: The second output end y8 of the document feeding counter C1 is connected to the introduction conveyance roller pair 98 and the endless The output signal is output when the conveyance bell) 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). It generates "H" and supplies this output signal rHJ to AND gate A8. At this point, the trailing edge of the document 94 is located at the first document detector 236.
If the first document detector 236 continues to detect the document 94 and generates its output signal rHJ due to a jam in the document 94 until it passes the detection position of In this case, the flip-flop FF5 is set and a signal "H" is generated at its output terminal Q.
Since the flip-flop FF4 is in the reset state and the signal rHJ is generated at its output terminal Q, the ant game
A signal "H" is generated at the output terminal of ) A5, and this signal rHJ is supplied to analogue game ) A8. Therefore, the AND gate A8 generates a signal "H" at its output terminal, and supplies this signal rHJ to the input terminal PR of the slip prop FF2 via the OR gate 05. Thus,
Flip-flop FF2 is set, and a document jam occurrence signal, that is, a signal "H" is generated at its output terminal Q.

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

(n-v) Generation of a copying process start signal; The third output terminal z1 of the document feeding counter C1 is configured so that even if the conveyance of the document 94 is stopped, the document 9
the second document position regulating member 16 whose front edge of No. 4 is in the blocking position;
8 (FIGS. 3, 8, and 10-A) when the introduction conveyance roller pair 98 and the endless conveyance belt 134 are driven by a sufficient amount of operation to convey the document 94 to a position where it can reach the For example, the output signal rHJ is generated at the time when 60 pulse-like signals have been counted. This output signal "HJ" is supplied to the main control means of the electrostatic copying machine itself as a copy process start signal via the OR gate 06. Then, in response to this copy process start signal, the electrostatic copy machine itself performs the required (Therefore, in order to start the required copying process by the electrostatic copying machine itself, a copy start switch P S -jl!, which is equipped on the electrostatic copying machine itself! 1 and 2) is started. (No need to operate one)

(II-vi) Document feeding stop: The fourth output terminal α□ of the document feeding counter C1 is connected to the second document position regulating member 1 where the front 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 68 (FIGS. 3, 8, and 10-A). The output signal rHJ is generated at a time point (for example, when 63 pulse-like signals are counted). This output signal “H”
is supplied to slip prop FF5 via OR gate 03 to clear slip prop 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 894 continues to move forward due to coasting after the feeding is stopped, and its leading edge reaches the second document position regulating member 168 (FIGS. 3, 8, and 10-A) which is in the blocking position. It will stop when it makes contact.

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 document position regulating member 168 of J2 can 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.

(111) Start of original ejection to end of original ejection; (nl-i
) Start of original discharge: 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 outputs a deactivation signal. "H"
generate. This inactivation signal "H" is the number of copies that the pulse-like copy number signal "H" generated by the main control means each time a copying process is performed (for example, at the end of an exposure process) matches the set number of copies. It disappears at the time when only 1 is generated, that is, it becomes the operation start signal rLJ. In this way, the above signal “L
' is converted into rHJ by inverter IN3 and supplied to A9. Further, since the copy number signal rHJ is in the form of a pulse, it disappears immediately, that is, becomes the signal rlJ, and this signal rlJ is also converted to "H" 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, 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 point, the output signal of the first document detector 236 is "L", and this output signal rlJ is converted to "H" by the inverter IN2, and the AND gate A
At the same time, the signal "H" from the output terminal Q of the set flip-flop FF5 is also supplied to the terminal gate A7, and therefore the signal "H" is generated at the output terminal of the anti-gate AV. The signal "H" is supplied to the flip-flop FF4, and the flip-flop F
I'm setting F4. Therefore, the flip-flop F
A signal rHJ is supplied from the output terminal Q of F4 to the input terminal of flip-flop FF6.

Therefore, when the signal rHJ is supplied to the input terminal CP of the flip-flop FF6 as described above, the flip-flop FF6 is set and the signal "H" is generated at its output terminal 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 analog game (AIO). This AND gate ALU is also supplied with a signal rHJ from the second output terminal y of a document ejection counter C2, which will be explained later, and thus a signal "H" is generated at the output terminal of the AND gate A10. . This signal "H" is sent to solenoid 176, thus energizing solenoid 176. When solenoid 176 is energized, jl! 10-AI! As shown by the two-dot chain line in l, the document position regulating member 168 of the screen 2 is aligned with the document 9.
The pressing roller 170 is positioned at the non-blocking position that allows the movement of the roller 4, and the pressing roller 170 is positioned at the operating position.

The signal "H" from the output terminal Q of the set flip-flop FF6 is also supplied to the OR gate 02, and therefore, after the predetermined delay time set by the delay circuit D2 has elapsed, a signal is sent to the output terminal of the flip-flop A6. rHJ is generated, and this signal "H" is supplied to the drive source to energize the drive source. Then, the endless conveyance belt 1340 starts working together with the introduction conveyance roller pair 98, and the discharge of the original 94 is started, and the original [94] passes from the main part 52 of the original conveyance path 50 to the original guide W656 to the original receiving surface 4G ( Figure 1).

(III-ii) Start of counting by the document ejection counter C2: When the drive source is energized as described above, (II-i)
), the optical detector 232 of the actuation quantity detector 228 begins to sequentially generate pulsed signals. At the same time, since the flip-prop FF6 is set, the signal supplied from its output terminal Q to the document ejection counter C2 becomes "L", thereby causing the document ejection counter C2 to become "L".
2 starts counting pulsed signals from the optical detector 232 of the actuation amount detector 228.

(In-iii) The leading edge of the document is the second document detector 242
Document jam detection until reaching: The first output end x2 of the document ejection counter C2 detects when the leading edge of the document 94 that has started to be ejected 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 sufficient distance (
For example, when 20 pulse-like signals are counted, an output signal "H" is generated, and this output signal "H" is
l Supply to 1. 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 INS, and the output signal is converted to "H" by the AND gate A11. is supplied to. Therefore, a signal rHJ is generated at the output terminal of the gate A11, and this signal r
Flip flop FF2 via HJ (or game) 05
is supplied to the input end PR of. As a result, the flip-flop FF2 is set, and a document jam occurrence signal, that is, a signal rHJ is generated at its output terminal Q. When such a document jam occurrence signal is generated, the same operation as described in (ni) above is performed.

(III-iv) Deenergizing the solenoid 176: The second output terminal y2 of the document ejection counter C2 is normally connected to the signal “H”.
'' is generated, but when the document is ejected by a distance corresponding to the maximum dimension in the conveyance 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 rHJ is set to "L". When the signal at the second output terminal y2 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.

(III-v) Stopping document ejection: The third output terminal α of the document discharge counter C2.

Even if the original 94 has the maximum dimension in the conveyance direction, the original 94 that has started to be ejected can be sufficiently placed on the original receiving surface 4.
The output signal "H" is generated at the time when the endless conveyor belt 134 is driven by the amount of operation required to discharge 6 pulses (for example, at the time when 130 pulse signals are counted). This output signal rHJ
is supplied to flip-flop FF6 via OR gate 04, and clears flip-flop FF6. In this way, the signal at the output terminal Q of flip-flop FF6 becomes “L”.
'', the drive source is deenergized, and the driving of the endless conveyance belt 134 together with the introduction conveyance roller pair 98 is stopped.

(DI-vi) Original jam detection until the trailing edge of the original passes the second original detector 242: The third output terminal α of the original ejection counter C2 generates the output signal rHJ. At this point, the trailing edge of the document 94 is detected by the document detector 2 at jI2.
Because the original 94 jams before passing the detection position of 42, the second original detector 242 continues to detect the original 94 (in other words, it does not yet detect the trailing edge of the original II 94). If the output signal “H” continues to be generated,
This output signal "rH" continues to be supplied to the AND gate A12. On the other hand, the above (m-v) is determined by the output signal rHJ generated by the third output terminal α of the document ejection counter C2.
When the flip-flop FF6 is cleared as described in , an output signal “H” is output to the output terminal Q of the flip-flop FF6.
" is generated.

As a result, the document discharge counter C2 is cliffed and the output signal rHJ is supplied to the AND gate Al2, so that the signal rHJ is generated at the output terminal of the AND gate A12. The signal rHJ is set in the flip-flop FF2 via the OR game 05, and a document jam occurrence signal, ie, rHJ, is generated at the output terminal Q of the flip-flop FF2. When such a document jam occurrence signal is generated, the operation described in (II-i) above is performed.

(rV) When the next original is manually positioned before the start of original ejection: As mentioned in (If-iv) above, when the trailing edge of the original 14 passes the detection position of the first original detector 236, 1
The output signal of the original document detector 236 becomes "L". However, if the next document 94 is manually positioned as per the director before the ejection of the document 94 is started as explained in (III-i) above, then as mentioned in (I-■) above, Then, the output signal of the first document detector 23G becomes "
It becomes "H".

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 "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 generating a signal "H" at its output terminal Q. The signal rHJ generated at the output terminal Q of the flip-flop FF3 is supplied to the AND gate A4 via the OR gate Ol. 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 "HJ" is generated at the output terminal Q of the flip-flop FF4. , this signal rHJ is also supplied to the ant gate 4. Therefore, the signal rHJ is supplied to the output terminal of the ant gate A4.
is generated and supplied to the input terminal CP of the flip-flop FF5, and the flip-flop FF5 is set. The feeding of the next document 94 is then initiated as mentioned in (I-jii) 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 generated at the output terminal Q of the flip-flop FF3 is also supplied to the AND gate A13. Further, the signal rHJ is also supplied to the ant gate 13 from the output terminal Q of the flip-flop FFI which has been reset, and therefore the signal rHJ is generated at the output of the AND gate A13, and is passed through the OR gate 06 as a copying process start signal. It is supplied to the main control means of the electrostatographic 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 of the next document 94 by the electrostatic copying machine main body in response to the output signal "H" generated by the output terminal Z1 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 (see FIG. 3) is lifted.

5111, Figures 1 and 4A) to the open position, and if there is a jammed document, remove it. 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 open state, and its output signal is " Thus, the document jam occurrence signal as described above is eliminated.

(Vl) When placing the original on the transparent plate 8 manually: When placing the original on the transparent plate 8 by manual operation without using the original feeding and ejecting device 4 (When placing the original to be copied on the transparent plate 8 by manual operation)
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-active position as shown in FIG. As a result, the main frame position detector 254 enters the second state, that is, the open state, and its output signal becomes rHJ, and this signal "H" is supplied to the input terminal CL of the flip-flop FFI, thereby causing the flip-flop FF1 is cleared. Then, the signal "L" is supplied to the Nant gate Nl from the output terminal Q of the flip-flop FF4 in the reset state, and the signal rl is supplied from the output terminal of the OR gate 06.
.

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. Thereafter, a copying process start switch PS (FIGS. 1 and 2) provided on the electrostatic copying machine main body is pressed, thus starting the copying process by the electrostatic copying machine main body. In this way, the main control means of the electrostatic copying machine main body generates a deactivation signal rHJ, and this signal "H" is supplied to the input terminal CP of the flip-flop FFI, and the input terminal CP of the flip-flop FFI is
FI is set. Therefore, the flip-flop FFI
A signal "HJ" is generated at the output terminal Q of the flip-flop FFI, which lights up the lamp L3 indicating that there is an original manually placed on the transparent plate 8. The signal rHJ is also supplied to the input terminal CL of the flip-flop FF5 via the OR gate 03 to reset the flip-flop FF5, so that even if another document is manually positioned in the document feeder and ejector I4, the solenoid 118 And the drive source is not energized.The lighted lamp L3 is turned off when the flip-flop FFI is reset by returning the main frame 12 to the operating position shown at 1t!I.

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

[Brief explanation of the drawing]

FIG. 1 shows an electrostatic copying machine equipped with an original feeding and ejecting device configured according to the present invention, with the main frame of the original feeding and ejecting device in an active position, and the original holding mechanism in a non-active position. The slope view shown in the state where it is positioned. FIG. 2 shows 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 similar to . FIG. 1 is a sectional view of the document feeding and ejecting device shown in FIG. 1. 3 and 4 to 6111 are partial perspective views showing a part of the document feeding and discharging device shown in FIG. Fig. 111I is a partial sectional view showing a part of the document feeding and ejecting device shown in Fig. 111I. j1 Fu Bl! I indicates that document feeding has started! ? - 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 discharging 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. 10-8 is a partial sectional view similar to Fig. 10-A, showing a state in which the main frame body 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 10. Stationary support frame 12. Main frame 4B. Document receiving surface 50. Document transport. Path 52...Main part 54 of the document conveyance path...Introduction part 56 of the document conveyance path...Wave/mountain lead-out part 90 of the document conveyance path...Document table 98...Introduction conveyance U-RA pair 100...First Original position regulating member 134...Endless conveyor belt 16B...Second original position regulating member 170...Press roller 18B...Upstream original leading roller 190...Downstream side 1i1 leading roller 228...Operation amount detector 236 ...First document detector 242...Second document detector 254...Main frame body position detector

Claims (1)

[Claims] 1. A main part extending on a transparent plate disposed on the upper surface of the copying machine housing, an introduction part located on the upstream side of the main part, and a lead-out part located on the downstream side of the main part. a document transport mechanism for transporting a document through the document transport path, the document transport mechanism including at least one endless transport belt having an operative running portion passing through at least the main portion of the document transport path; A document that is selectively positioned at a blocking position where the document protrudes near the downstream end of the main portion of the document transport path to prevent the document from advancing, and a non-blocking position where it retreats from near the downstream end of the main portion and allows the document to proceed. In the document feeding and ejecting device including a position regulating member, and a control means for controlling the operation of the document transport mechanism and the positioning of the document position regulating member, the document transport mechanism further comprises: a position regulating member; an operating position where the document position regulating member presses the back surface of the endless conveyor belt to bring the surface of the endless conveyor belt into contact with or close to the transparent plate on the upstream side of the position where the document position regulating member blocks the advance of the document in the main portion of the path; and a non-working position for releasing pressure on the endless conveyor belt, the pressing roller being positioned in the non-working position when the document position regulating member is positioned in the blocking position. and the pressing roller is positioned at the operating position when the document position regulating member is positioned at the non-blocking position. 2. The document feeding and discharging device according to claim 1, wherein the document position regulating member and the pressing roller are moved as a unit.