JPS62244825A - Copying machine - Google Patents

Abstract

PURPOSE:To enhance the copying efficiency of a copying machine capable of forming images on both surfaces of a copy sheet even when copy is made to only one surface of a copy sheet, by feeding a new copy sheet to the upstream end of a copy sheet conveying path through a copy sheet receiving and feeding means. CONSTITUTION:When copy sheets are fed from a copy sheet receiving and feeding means 90, a conveyance control means 578 is prevented from being located at a second position. Further, when a copy sheet supply means 548 feeds copy sheets, the conveyance control means 578 may be prevented from being located at the second position even though copy sheets are present in a feeding means 590. Further, the copy sheet receiving and feeding means 590 receives a copy sheet which is returned through a copy sheet returning, and serves to feed a copy sheet fed from the outside of the copying machine into the conveying path. Therefore, it is possible to use the above-mentioned copy sheet receiving and feeding means 90 for supplying a new copy sheet into the conveying path 588.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a copying machine, and more particularly to a copying machine capable of forming images on both sides of copy paper as necessary.

<Prior art> From the standpoint of saving copy paper and reducing the number of documents to be stored, it is sometimes desirable to form images on both sides of copy paper. Copying machines capable of forming images on both sides of a paper have been proposed and put into practical use.

A typical example of such a copying machine includes a housing, a photoreceptor disposed within the housing, an image forming means for forming an image on the photoreceptor, and an image forming means defined within the housing and arranged in the photoreceptor. a copy paper conveyance path extending through a transfer area where the image on the body is transferred to a sheet of copy paper; a copy paper supply means for feeding the sheet of copy paper to an upstream end of the copy paper conveyance path; The apparatus includes a copy paper return path defined within the housing, a conveyance control means disposed within the housing, and copy paper receiving and discharging means disposed within the housing. The conveyance control means has a first position for discharging the copy paper conveyed through the copy paper conveyance path out of the housing, and a first position for discharging the copy paper conveyed through the copy paper conveyance path to the copy paper return path. and a second position for guiding. The copy paper receiving and sending means receives the copy paper returned through the copy paper return path, and feeds the received copy paper to the upstream end of the copy paper transport path.

In such a copying machine, an image is formed on one side of the copy paper while the copy paper is fed from the copy paper supply means to the copy paper conveyance path and is conveyed through the copy paper conveyance path.

If it is desired to form an image on only one side of the copy paper, the above-mentioned copy paper with an image formed on one side is
Expelled from the housing. On the other hand, if it is desired to form an image on both sides of the copy paper, the copying machine with the image formed on one side is introduced into the copy paper return path, and the copy paper is received and delivered through the copy paper return path. means to be returned. Then, the copy paper is fed back to the copy paper transport path from the copy paper receiving and delivering means, and an image is formed on the other side of the copy paper while being conveyed again through the copy paper transport path. Thereafter, the copy paper with images formed on both sides is ejected from the housing.

<Problems with the Prior Art> However, the above-described conventional copying machine has the following problems to be solved.

First, when copy paper becomes jammed in the copy paper receiving and sending means disposed inside the housing, in order to remove the jammed copy paper, operations such as opening various parts of the housing are required. Therefore, it is not possible to remove the jammed copy paper and restart the copying operation sufficiently easily and quickly.

Second, it is generally desirable to form images on both sides of a copy sheet significantly less often than when it is desired to form an image on only one side of the sheet, and the operating time of the copier is much larger. In some areas, an image is formed on only one side of the copy paper. When an image is formed on only one side of the copy paper, the copy paper receiving and sending means does not perform any function.On the other hand, in order to improve copying efficiency,
It is desirable to selectively supply copy sheets of various sizes from a copy paper supply means to a copy paper conveyance path, but in order to do so, it is necessary to increase the number of copy paper supply means;
Larger copy machines and! ! ! ! Incurs construction costs.

Third, the configurations of the conveyance control means, the copy paper return path, and the copy paper receiving and sending means are relatively complex, and the manufacturing cost is relatively low. It is expensive.

<Object of the Invention> The main object of the present invention is to provide a system that, when copy paper becomes jammed in the copy paper receiving and sending means, allows the jammed copy paper to be removed easily and quickly and the copying operation to be resumed. When an image is to be formed on only one side of the copy paper, the copy paper receiving and sending means provided for forming images on both sides of the copy paper can be replaced with a new copy paper on which no images are formed on both sides of the copy paper. can be effectively used to feed the copy paper to the upstream end of the copy paper conveyance path, thus improving copying efficiency when forming an image on only one side of the copy paper without increasing the number of copy paper supply means. It is an object of the present invention to provide a new and improved copying machine capable of improving the quality of reproduction.

Another object of the present invention is to simplify the configuration of a conveyance control means, a copy paper return path, and a copy paper receiving and sending means for forming images on both sides of copy paper, thereby reducing manufacturing costs. , to provide a new and improved copying machine.

Other objects of the invention will become apparent from the subsequent description with reference to the accompanying drawings.

SUMMARY OF THE INVENTION According to the present invention, the copy paper receiving and delivering means includes a copy paper cradle removably mounted on the housing and projecting at least partially outside the housing, and the copy paper return path The copy paper returned through the housing is received into the copy paper cradle, and the sheet copy paper can also be loaded by a manual ring onto the copy paper cradle from outside the housing, thus achieving the above main purpose. A copying machine is provided.

Further, according to the present invention, there is provided a copying machine in which unique improvements are made to at least one of the conveyance control means, the copy paper return path, and the copy paper receiving and sending means, and thus the other objects mentioned above are achieved. Ru.

Other features and technical advantages of the present invention will become apparent from the following description with reference to the accompanying drawings.

<Preferred Specific Examples of the Invention> Hereinafter, an example of a copying machine configured according to the present invention will be described with reference to the accompanying drawings.

(7) First, an overview of the illustrated copying machine as a whole will be explained with reference to FIG. The copying machine shown in FIG. 1 includes a housing 502 having a substantially rectangular parallelepiped shape.

On the upper surface of this housing 502, there is a stationary transparent plate 504 on which a document to be copied (not shown) is placed, and a document that can be opened and closed to cover the transparent plate 504 and the document placed thereon. A pressing member 506 is provided.

A rotating drum 508 having a photoreceptor on its circumferential surface is rotatably mounted approximately in the center of the housing 502 . Rotating drum 508 driven to rotate in the direction indicated by arrow 510
Around the area, in order as viewed in the direction indicated by arrow 510, there are a charging area 512, an exposure area 514, a developing area 516, and a transfer area 518.
and a cleaning area 520 are defined. Charging range 5
12 is provided with a charging corona discharger 522, and a developing area 516 is provided with a developing device. ! ! 524 is arranged, and the transfer area 51
A transfer corona discharger 526 and a peeling corona discharger 528 are disposed at 8, and a cleaning device 532 having a residual toner removing blade 530 is disposed in the cleaning area 520.

An optical system, generally designated by the number 534, is disposed above the rotating drum 508. The optical system 534 includes a movable original illumination lamp 536, a first movable reflector 538, a second movable reflector 540, a third movable reflector 542, a stationary lens assembly 544, and a stationary reflector 546. . During scanning exposure, the movable original illumination lamp 536 and the first movable reflecting mirror 538 are moved substantially horizontally to the required position from the scanning exposure start position shown by the solid line. (for example, the maximum scanning exposure end position shown by the two-dot chain line) at the required speed V, and
The movable reflecting mirror 540 and the third movable reflecting mirror 542 are moved to a required position il substantially horizontally from the scanning exposure start position shown by the solid line.
! ! (For example, the maximum scanning exposure end position shown by the two-dot chain line) is moved at a speed of V/2, which is half of the above-mentioned required speed. At this time, the original placed on the transparent plate 504 is illuminated by the movable original illumination lamp 536, and the reflected light from the original is reflected from the first. Second and third movable reflector 538.5
40 and 542 to form a lens assembly 544.
The light is then reflected by a stationary reflecting mirror 546 and projected onto the photoreceptor in the exposure area 514.

When the scanning exposure is completed, the movable original illumination lamp 536 and the first . Second and third reflecting mirrors 538, 540 and 54
2 is returned to the scanning exposure start position shown by the solid line.

At one end of the housing 502, that is, at the right end in FIG. One of several types of copy paper cassettes 550 containing sheets of copy paper of different sizes is selectively and removably attached to the cassette. The copy paper cassette 550 includes a box-shaped cassette main body 552 with an open top and a copy paper loading plate 553 swingably mounted inside the cassette main body 552. Copy paper skein.

A delivery roller 554 is provided for delivering copy sheets one by one from the tray 550. Copy paper sent out from a copy paper cassette 550 mounted on a cassette receiving section passes through a copy paper feed path 556 and is delivered to a copy paper transport path indicated by the number 558 as a whole.

The copy paper feed path 556 is defined by a guide plate 560 and a guide plate 562. The copy paper conveyance path 558 is
It extends substantially horizontally from the upstream end 564 to the downstream end 566 from right to left in FIG.

The copy paper conveyance path 558 includes a pair of conveyance rollers 568 whose two-pronged portion is the upstream end, a pair of guide plates 570, and the transfer area 5.
18 (i.e., rotating drum 508 and transfer corona discharger 5
26 and a peeling corona discharger 528), a conveyor belt mechanism 572, an inner book 574, and a pair of heating and fixing rollers 576 whose nip region is the downstream end. Note that a peeling member 5 is attached to the lower heating fixing roller 576.
77 is attached.

A conveyance control means 578 is disposed adjacent to the downstream end of the above-mentioned copy paper conveyance path 558. This conveyance control means 578 is selectively positioned at a first position shown by a two-dot chain line in FIG. 1 and a second position shown by a solid line. The transport control means 578 will be described in more detail later. Transport M
A copy paper ejection path 584 having an upper guide member 580 and an ejection roller 582 is provided downstream of the il1 means 578. A saucer 586 is detachably attached to the other end of the housing 502, that is, the left end in FIG.

Further, in association with the transport control means 578, there is provided a copy paper return path, generally designated by numeral 588. The copy paper return path 588 extends from the upstream end adjacent to the upstream end of the transport control means 578, passing below the copy paper transport path 558 from left to right in FIG. This copy paper return path 588 will also be described in detail later. As can be easily understood from FIG. 1, when the conveyance control means 578 is in the first position, the copy paper conveyance path 558 and the copy paper discharge path 584 are communicated with each other, and the conveyance control means 578 is in the position of -Wrestler Foot Temperature 2. Sometimes the copy paper transport path 558 and the copy paper return path 588
communicate with.

In the illustrated electrostatic copying machine, the copy paper return path 58
On the downstream side of the copy paper receiving and delivering means 590, there is provided a copy paper receiving and delivering means, which is indicated by the number 590 in its entirety. A copy paper delivery path, generally designated 592, is provided that extends to an upstream end 564 of transport path 558.

The copy paper receiving and sending means 590 is connected to the copy paper return path 58.
8, the received copy paper is sent through the copy paper delivery path 592 to the copy paper conveyance path 55.
8 to the upstream end 564 of 8.

Such copy paper receiving and sending means 590 will also be described later. Further, the copy paper delivery path 592 is defined by a pair of guide plates 594.

The operation of the illustrated copying machine as described above will be summarized as follows.

The rotating drum 508 is rotated in the direction indicated by an arrow 51O, and as the drum 508 rotates, a toner image is formed on the photoreceptor of the rotating drum 510 by the action of the image forming means. That is, in the charging area 512, the charging corona discharger 52
2, the surface of the photoreceptor with the rotating drum 508 is charged to a specific polarity, and in the exposure area 514, the light plate 504
The image of the original placed thereon is scanned and exposed onto the photoreceptor by the optical system 534, thus forming an electrostatic latent image on the photoreceptor. In the developing area 516, a developing device 524 applies toner to the electrostatic latent image on the photoreceptor to convert the electrostatic latent image into a toner image. The toner image formed on the photoreceptor is then transferred to transfer area 518. Transcription area 518
In this case, copy paper (
(Conveyance of the copy paper will be further described later) is brought into contact with the surface of the photoreceptor, and the toner image on the photoreceptor is transferred onto the copy paper by the action of the transfer corona discharger 526. Next, the copy paper is peeled off from the photoreceptor by the action of the peeling corona discharger 528. The peeled copy paper is conveyed to a pair of heat fixing rollers 576, and the toner image is fixed onto the copy paper as it passes through the pair of rollers 576. On the other hand, in the cleaning area 520, a residual toner blade 530
The residual toner is removed from the surface of the photoreceptor by this action.

The conveyance of copy paper will be explained as follows. First, the case where an image is formed on only one side of copy paper will be described. In this case, the conveyance control means 578 is positioned at the first position shown by the two-dot chain line. The copy paper introduced into the copy paper conveyance path 558 from the copy paper cassette 550 installed in the cassette receiving section is conveyed through the copy paper conveyance path 558. . During this time, a toner image is transferred to one side (i.e., the top side) of the copy paper in the transfer area 518, and the toner image is fixed onto one side of the copy paper by the action of the heated fixing roller pair 576, thus An image is formed. Next, the copy paper is guided from the copy paper conveyance path 558 by the conveyance control means 578, introduced into the copy paper discharge path 584, and ejected to the receiving tray 586 through the copy paper discharge path 584. A copy having an image formed on one side is thus obtained.

When forming images on both sides of copy paper, the transport control means 578 is first positioned at the second position shown by the solid line. Next, when the copying process is started, the copy paper conveying path 5 is transferred from the copy paper cassette 550 installed in the cassette receiver
The copy paper introduced into 58 is conveyed through a copy paper conveyance path 558. During this time, a toner image is transferred to one side (i.e., the top side) of the copy paper in the transfer area 518, and the toner image is fixed onto one side of the copy paper by the action of the heated fixing roller pair 576, thus An image is formed. The copy paper from the copy paper transport path 558 is guided by the transport control means 578 and introduced into the copy paper return path 588, and is passed through the copy paper return path 588 to the copy paper receiving and delivering means 590 as required. Accepted.

When the required number of copies are returned to the copy paper receiving and sending means 590 as described above, the conveyance control means 578 is returned to the first position. Thereafter, the copy paper received by the copy paper receiving and delivering means 590 is transferred to the copy paper delivery path 5.
92. The copy paper sent out to the copy paper delivery path 592 is advanced sheet by sheet through the copy paper delivery path 592, and is again supplied to the copy paper transport path 558.

As can be easily understood by referring to FIG. 1, the copy paper is conveyed through the copy paper return path 588 and the copy paper delivery path 592, so that the front and back sides of the copy paper are reversed, and one side on which an image has already been formed is turned over. The copy sheet is supplied to the copy paper conveyance path 558 with its face down. The copy paper is then conveyed through copy paper transport path 558. In this case,
A toner image is transferred to the other side, that is, the top surface, of the copy paper in the transfer area 518, and the toner image is fixed onto the copy paper by the action of the heat fixing roller pair 576, thus forming an image on the other side of the copy paper. It is formed. The copy paper is then transferred to the copy paper transport path 558.
is guided by the conveyance control means 578 from the copy paper ejection path 5
84 and passes through the copy paper discharge path 584 to the tray 5.
It is discharged at 86. In this way, a copy having images formed on both sides is obtained.

Therefore, the above-described configuration and operation of the illustrated copying machine do not constitute novel features improved according to the present invention, but merely represent an example of a copying machine to which the present invention can be applied. Therefore, detailed explanations regarding these will be omitted in this specification.

1' and 1 to 1, with reference to FIG. 2 as well as FIG.
78 includes a plate member 596 for guiding the sheet of copy paper as required. A front board and a rear board (none of which are shown) are arranged at intervals in the housing 502 of the copying machine in the front and rear direction (in the direction perpendicular to the plane of the paper in FIG. 1, and in the direction from the lower right to the upper left in FIG. 2). It is set up. A support shaft 598 is rotatably mounted between the front board and the rear board, and a plurality of plate members 596 are fixed to the support shaft 598 at intervals in the front-rear direction, that is, in the width direction. Each plate member 596 has a substantially triangular shape, and as described later, the upper edge 60
0a and the leading edge 600b act as guide surfaces. In association with these plate members 596, a plate member turning means 602 is provided which turns the plate members 596 to control the conveyance of the copy paper.

The illustrated plate member turning means 602 includes a lever member 606 and an electromagnetic lever 608. One end of the lever member 606 is fixed to one end extending forward of the support shaft 598, and the other end is the output end 608 of the electromagnetic solenoid 608.
a via a pin member so that a lever member 606 (described later) is allowed to rotate, and this output end 608a is fitted to connect the main body of the electromagnetic solenoid 608 and the lever member 60.
A coil spring 612 is interposed between the coil springs 6 and 6. Therefore,
When the electromagnetic solenoid 608 is deenergized, each plate member 596 is positioned in the first position shown by the two-dot chain line in FIGS. 1 and 2 by the action of the coil spring 612. , as shown in FIG. is rotated counterclockwise in FIGS. 1 and 2 integrally with the support shaft 598 through the
It is located in the second position shown in solid lines in FIGS. 1 and 2.

An upper guide member 580 and a discharge roller 582 defining a copy paper discharge path 584 are arranged above the conveyance control means 578. In the specific example, a pair of heat fixing rollers 576
A plurality of upper guide members 580 are disposed on the downstream side, and each of the plurality of upper guide members 580 is arranged between adjacent plate members 596 in the width direction (in the direction perpendicular to the plane of the paper in FIG. 1). , from the lower right to the upper left in FIG. 2). Further, mainly referring to FIG. 1, the discharge outlet roller 582 is disposed on the downstream side of the upper guide member 580. A rotating shaft 616 that rotates in a predetermined direction is disposed above the rear portion of the plate member 596, and a plurality of discharge rollers 582 are mounted on the rotating shaft 616 at intervals in the front-rear direction. Multiple discharge rollers 582
In the specific example, each is provided corresponding to each plate member 596.

Because of this configuration, as can be understood from FIG. 1, when the plate members 596 are in the first position, the J edge 600a of each plate member 596 is substantially horizontally aligned with the heat fixing roller pair. IP exit crawler 5 extending toward the vicinity of the nip of 576 and corresponding to the rear part of 8 & 600 above.
82 is brought into contact.

Therefore, the copy paper discharged from the heat fixing roller pair 576 is attached to the upper edge 600a of the plate member 596 and the upper guide member 58.
0, is guided by the upper edge 600a of the plate member 596, and is further conveyed to the downstream side, where the discharge roller 582 and the plate member 59
6 is discharged out of the housing by the cooperation of the upper edge 600a. On the other hand, when the plate member 596 is in the second position, the front end of the upper edge 600a of each plate member 59G passes through the copy paper discharge path 584 and is located between the upper guide members 580, and the copy paper discharge path 584 is virtually occluded. Therefore, the copy paper discharged from the heat-fixing roller pair 576 is not conveyed to the copy paper discharge path 584, but is guided by a portion of the upper guide member 580 and the front edge 600b of the plate member 596, and is guided to the copy paper return route. Introduced in 588.

As described above, the transport control means 578 with the above configuration
In a copying machine equipped with a relatively hour wheel configuration, the copy paper conveyed through the copy paper transport path 558 can be selectively ejected from the housing 502 or introduced into the copy paper return path 588. can.

Referring again to FIGS. 1 and 2, the configuration of the copy paper return path 588 will be further described. In a specific example,
The copy paper return path 588 extends below the copy paper transport diameter 'et 558 and the copy paper delivery path 592 from left to right in FIG.
0b and a protrusion 614 provided on the bottom wall 618 of the housing 502, and the other side is defined by a guide plate 620,
Return roller 622, guide plate 624, and return roller 626
defined by. To explain further, the housing 502 of the copying machine has a bottom wall 628, and a front board and a rear board (neither of which are shown) are attached to the top surface of the bottom wall 62B at intervals in the front-rear direction. The above-mentioned components are arranged between the rear substrate and the rear substrate. In the specific example b, a copy paper return path 588 is provided on the upper surface of the bottom wall 628 in the front and rear direction, that is, a copy paper return path 588 is provided.
A plurality of protrusions 614 are provided at intervals in the width direction, and these protrusions 614 are integrally formed with a bottom wall 628 made of synthetic resin. These protrusions 614
Each of these extends from the left end in FIG. 1 of the housing 502 to the right end in FIG. 1, and is disposed corresponding to each plate member 596 of the transport control means 578. Each protrusion 614 has a left protruding horizontal portion 630a, a left inclined portion 630b, from left to right in FIGS.
, intermediate horizontal part 630C1 right inclined part 630d, right protruding horizontal short part 630C1 right inclined short part 630f and right step part 630g
(FIG. 1, FIG. 2), the left protruding horizontal portion 630
The upper edge of a extends substantially horizontally from the left end of the housing 502 to the right in FIG. 1, and a plate member 596 of the conveyance control means 578 is disposed above the upper edge. The upper edge of the left inclined portion 630b is inclined downwardly toward the right in FIG. 1 from the right end of the left protruding horizontal portion 630a. The upper edge of the left inclined portion 630b cooperates with the front edge 600b of the plate member 596 in the second position to define a substantially continuous arcuate guide surface. In addition, the intermediate horizontal portion 63
The upper edge of 0C extends substantially horizontally to the right in FIG. 1 from the right end of the left inclined portion 630b. Right inclined part 630d
The upper edge of the intermediate horizontal portion 630c is inclined upwardly toward the right in FIG. 1 from the right end of the intermediate horizontal portion 630c. Further, the upper edge of the right protruding horizontal short portion 630c extends substantially horizontally to the right in FIG. 1 from the right end of the right inclined portion 630d. A return roller 632 (FIG. 1), which will be described later, is brought into contact with the upper edge of the right protruding horizontal short portion 630e. The upper edge of the right inclined short portion 630r extends downwardly from the right end of the stone protruding water bath short portion 630e toward the right in FIG. Further, the right step portion 630g is provided at the right end of the right inclined end portion 630f, and its upper edge extends substantially horizontally from the right end of the right inclined end portion 630f to the right end of the housing 502.

Such right end portion 630g defines a receptacle for receiving copy paper receiving and delivering means 690, which is formed in right wall 634 of housing 502, as seen in FIGS. It is removably attached to the receiving part through the opening 636.

In the specific example, the plurality of protrusions 614 are further configured as follows. Referring to FIG. 1, a guide plate 620 is disposed opposite the front edge 600b of the plate member 596 and the left inclined portion 630b of the protrusion 614. Further, a guide plate 620 is provided above the intermediate horizontal portion 630c and the right inclined portion 630d of the protrusion 614.
is installed. Furthermore, a rotating shaft 638 extending in the width direction is disposed between the guide plates 620 and 624, and a plurality of return rollers 622 are attached to the rotating shaft 638. Each of the plurality of return rollers 622 is connected to the rotating shaft 6.
38 axially spaced apart from each other on the bottom wall 628 (Fig. 2).
The rotating shaft 638 is rotationally driven in a predetermined direction, so that each return roller 622 cooperates with the corresponding protrusion 614 to return the copy paper to the right in FIG. In addition, the guide plate 624
A rotating shaft 640 extending in the width direction is disposed above the rotating shaft 640, and a plurality of return rollers 626 are attached to the rotating shaft 640. Each of the plurality of return rollers 626 is also attached to each of the protrusions 614 at intervals in the axial direction of the rotating shaft 640 (FIG. 2).The rotating shaft 640 is rotated in a predetermined direction. Rotationally driven, each return roller 626 thus cooperates with a corresponding protrusion 626 to return the copy paper. still,
In the specific example, in order for the return roller 626 to cooperate with the protrusion 614, an opening (not shown) through which the lower part of the return roller 626 can protrude downward is provided in a portion of the guide plate 624 corresponding to the return roller 626. It is formed.

Furthermore, as will be described in detail later, a return roller 628 that is rotated in a predetermined direction is provided corresponding to each of the right protruding short portions 630a of the protrusion 614 (see also FIG. 4). . Each return roller 628 also cooperates with the corresponding protrusion 614 to return the copy paper.

Therefore, as can be understood from FIG. , right inclined part 630d, right protruding horizontal short part 6
The other side (upper side) is defined by a guide plate 620, a return roller 622, a guide plate 624, a return roller 626, and a return roller 632. Therefore, when the plate member 596 of the conveyance control means 578 is positioned at the second position, the copy paper discharged from the heat fixing roller pair 576 is guided to the front edge 600b of the plate member 596, as described above. and is introduced into the copy paper return path 588. The copy paper introduced in this way is conveyed to the return roller 622 through between the protrusion 614 and the guide plate 620, and due to the cooperative action of the return roller 622 and the protrusion 614, the protrusion 614 and the guide plate
24 and is conveyed to the return roller 626.

Furthermore, this copy paper is conveyed to the return roller 632 through the space between the protrusion 614 and the guide plate 624 by the cooperative action of the return roller 626 and the protrusion 614, and then conveyed to the return roller 632.
By the cooperative action of the protrusions 614 and 614, the copy sheet is received as required by the copy paper receiving and delivering means 590, which will be described later.

In the copying machine configured as described above, at least a portion of the copy paper return path 588 is defined by the protrusion 6]4 formed integrally with the bottom wall 62B made of synthetic resin. In particular, the structure of the portion related to the copy paper return path 588 can be significantly simplified, and manufacturing costs can be reduced.

Copy Receiving and Delivering Means Next, referring to FIG. 3 in conjunction with FIG. 1, the structure of the illustrated copy paper receiving and discharging means 590 will be described. Copy paper receiving and delivering means 590, which is detachably attached to housing 502, includes a box-shaped frame 642 with an open top. The front part of the bottom wall 644 of the frame body 642 is made to protrude more downwardly than the rear part, thereby defining an accommodation space to be described later in the lower front part of the frame body 642. A receiving plate 646 is disposed at the front inside the frame 642. Protrusions 648a and 648b that protrude upward are integrally provided at both ends of the rear end of the receiving plate 646, and these protrusions 648a and 648b connect to the side wall 652 of the frame 642 via the bin members 650a and 650b, respectively. and 654
It is attached so that it can rotate freely. Therefore, the receiving plate 646 can freely swing between the position shown by the two-dot chain line in FIG. 1 and the solid line in FIG. 3, and the position shown by the solid line in FIG. 1 and the two-dot chain line in FIG. be. In conjunction with the receiving plate 646, a stop block 656 is fixed to the upper surface of the front end of the bottom wall 644. The stop block 656 acts on the lower surface of the front end of the receiving plate 646 so that the receiving plate 646 moves counterclockwise in FIGS. 1 and 3 beyond the receiving position shown by the two-dot chain line in FIG. Reliably prevent turning in any direction. Therefore, the receiving plate 646 is normally held securely in the receiving position by its own weight. When in such a received position, the backing plate 646 defines a substantially continuous plane with the rear portion of the bottom wall 644 of the frame 642;
46 and the rear upper surface of the bottom wall 644 (therefore, the receiving plate 646
The rear portion of the bottom wall 644 constitutes a copy paper holder), in which copy paper is received as described later, or the copy paper is loaded manually. An accommodation space is defined below the receiving plate 646 as shown in FIGS. 1 and 3, and this allows a receiving plate lifting means 658, which will be described later, etc. to be provided below the receiving plate 646. Ru.

The illustrated receiving plate lifting means 658 includes a pair of lifting members and a means for positioning the lifting members, such as a stepping motor 662. The frame body 6 is mounted on the front upper surface of the bottom wall 644 of the frame body 642.
42 width direction (direction perpendicular to the page in Figure 1, 3rd direction)
A pair of support plackets 664a and 664b are provided at intervals from the bottom right to the top left in the figure. The support shaft 6 is located between the support brackets 664a and 664b.
66 is rotatably attached to the support shaft 666, and a pair of rising members 668a and 668 are spaced apart from each other in the axial direction.
b is fixed. The rising members 668a and 668b have a substantially elliptical shape, and one end thereof is fixed to the support shaft 666. The support shaft 666 is a support bracket 664b
It penetrates through and protrudes upward to the left in FIG. 3, and a stepping motor 662 is attached to the protruding end.

Accordingly, the rotation of the stepping motor 662 positions the raising members 668a and 668b in the non-operating position shown by the dashed double-dashed line in FIG. 1 and by the solid line in FIG.
In the inactive position, the raising members 668a and 668b
(extends toward the rear end of the frame 642) and the rising member 6
68a and 668b are located below and apart from the receiving plate 646, and the receiving plate 646 is brought into the receiving position by abutting the front end of the receiving plate 646 against the stop block 656. On the other hand, due to the rotation of the stepping motor 662, the lifting member 6
68a and 668b are shown in solid lines in FIG. 1 and shown in double-dashed lines in FIG.
Only 8a is located at the operating position (shown by a two-dot chain line).
In the active position, the raising members 668a and 668b extend upwardly of the frame 642) and the raising members 668a and 668b extend upwardly of the frame 642.
The other end portions a and 668b act on the lower surface of the receiving plate 646, causing it to pivot clockwise in FIGS. 1 and 3 about the bin members 650a and 650b, such that the front portion of the receiving plate 646 It is raised as shown by the solid line in FIG. 1 and as shown by the two-dot chain line in FIG.

(A pair of width regulating members 670a and 670b are provided on the upper surface of the receiving plate 646, which is mounted so as to be able to rise freely, so as to be movable in the width direction. In the specific example, the width regulating members 67
0a and 670b have an abbreviated vertical section, and the receiving plate 64
6 and the base 672a and 672b contacting the upper surface of the base 6
It has restriction portions 674a and 674b extending upward from 72a and 672b. Bin members 676a and 676b that protrude downward are fixed to the lower surfaces of the bases 672a and 672b of the width regulating members 670a and 670b, respectively. On the other hand, a pair of elongated holes 678 (only one is shown in FIG. 3) are formed in the receiving plate 646 and extend in the width direction, and the bin members 676a and 676b can freely slide along the elongated holes 678 within the elongated holes 678. has been accepted.

The receiving plate 646 is further provided with a moving means 680 for moving the pair of width regulating members 674a and 674b. In the specific example, the moving means 680 includes a stepping motor 682 and a pair of moving members 684a and 68.
4b.

The stepping motor 682 is mounted as required on the lower surface of the receiving plate 646, and a pinion 686 is fixed to its output shaft. A pair of moving members 684a and 684b are arranged on both sides of the pinion 686. One movable member 684a is attached to the lower surface of one side of the receiving plate 646 by a guide member (not shown) so as to be movable in the width direction in relation to the width regulating member 670a. A rack portion 688a is formed on the rear surface of the inner end of the moving member 684a, and the rack portion 688a is engaged with one side of the pinion 686. A protruding end of a bottle member 676a that protrudes downwardly through the aperture is connected to the bottle member 676a. In addition, the other moving member 684b
is attached to the lower surface of the other side of the receiving plate 646 by a guide member (not shown) so as to be movable in the width direction in relation to the width regulating member 670b. A rank portion 688b is formed on the front surface of the inner end of the moving member 684b, and the rack portion 688b is engaged with the other side of the pinion 686, and a rack portion 688b is formed at the outer end of the rack portion 688b. A protruding end of a protruding pin member 676b is connected to the lower part. As described above, the action of the stepping motor 682 causes the pinion 686 to move in the direction indicated by the arrow 690 in FIG.
(or 692), one moving member 684a is moved to the lower right (or upper left) in FIG. 3, and the other moving member 684b is moved to the upper left (or right) in FIG. Thus, the pair of width regulating members 670a and 670b are moved outward (or inward) in the width direction, and the gap between them becomes larger (or smaller).

Note that the copying machine to which the above-described copy paper receiving and sending means 590 is applied is such that the widthwise position of the copy paper conveyed through the copy paper conveyance path 558 is related to the widthwise center of the photoreceptor on the rotating drum 508. At least it is of the type that should be regulated.

Therefore, the receiving plate 646 is provided with a pair of width regulating members 674a and 674b. However, in the case of a type of copying machine in which the widthwise position of the copy paper conveyed through the copy paper conveyance path 558 is regulated in relation to one side edge in the width direction of the photoreceptor on the rotating drum 508, the receiving plate 646 It is sufficient to provide only one width regulating member.

Copy paper receiving and delivering means 590 as such is mounted to housing 502 as shown in FIGS. 1 and 2. That is, the front part of the frame 642 is connected to the right wall 6 of the housing 502.
housing 502 through an opening 636 formed in 36.
insert the front wall 694 into the stepped portion 630 of the protrusion 614.
The frame body 64 is brought into contact with the left end abutment surface of
2 is the receiving portion of the housing 502 (the stepped portion 6 of the protrusion 614).
(specified by 30g).

In this installed state, as can be seen from FIG. 1, the rear part of the frame 642 projects outward from the right wall 634 of the housing 502. Therefore, if a paper jam occurs in the copy paper receiving and discharging means 590 when receiving or discharging copy paper, the jammed paper can be easily removed through the opening 636 formed in the right wall 634 of the housing 502. (Removal of this jammed paper is made easier by disengaging frame 642 from housing 502).

The illustrated copy paper receiving and delivering means 590 further includes a copy paper feed roller 696 for delivering the copy paper. As shown in FIG. 1, the feed roller 696 is mounted on a rotating shaft 698 rotatably disposed above the receiving portion in the housing 502. As shown in FIG. The feeding roller 696 is located above the receiving plate 646 when the frame body 642 is detachably attached to the housing 502. Therefore, the frame body 642 is detachably attached to the lifting member 66 of the receiving plate lifting means 658.
When 8a and 668b are placed in the operating position, the receiving plate 6
46 is raised, and its upper surface (or the copy paper if there is copy paper on the receiving plate 646) is pressed against the feed roller 696. In order to keep the pressing force on the feeding roller 696 constant, the raising members 668a and 66
Preferably, 8b is formed from a somewhat elastic material.

In connection with the above-described copy paper receiving and sending means 590, the copy paper sending path 592 further includes a copy paper double feeding prevention means 70.
0 is placed. Referring to FIG. 4 together with FIG. 1,
The illustrated copy paper double feeding prevention means 700 includes a roller 702 that rotates in a predetermined direction and a friction pad 704 that cooperates with the roller 702 to prevent copy paper from being double fed.
04, a friction pad positioning means 706 is attached. In the specific example, a rotary shaft 708 extending in the width direction of the above-mentioned path 592, that is, in a direction perpendicular to the plane of the paper in FIG. The rotating shaft 70 that is attached to the
One roller 702 is attached to the axial center of the roller 8. Further, the friction pad positioning means 706 is a shaft member 7
A swing support member 712 rotatably mounted via 10
The friction pad 704 is provided at one end of this swing support member 712. Friction pad 704 can be formed from a material with a high coefficient of friction, such as a woven fabric. The other end of the swing support member 712 is connected to the connecting door 1
4 to the output end of the electromagnetic solenoid 716. With this configuration, the electromagnetic solenoid 716
is deenergized, the swing support member 712 is in the angular position shown by the dashed double-dashed line in FIGS. 1 and 4 by a spring member 7 (not shown), and the friction pad 704 is
02 (position W!, indicated by the two-dot chain line in FIGS. 1 and 4).

On the other hand, when the electromagnetic solenoid 716 is energized, the pivot support member 712 is pivoted about the shaft member 710 in the direction shown by the arrow 718 (FIG. 4) via the connecting rod 714, and the friction pad 704 is rotated as shown in FIG. It is positioned at the operating position shown by the solid line in FIG. 4 and is pressed against the circumferential surface of the roller 702.

In a specific example, as shown in FIG.
The above-mentioned return roller 632 is attached to the rotating shaft 708 on which the
is installed. To explain further, the copy paper return path 5
A plurality of return rollers 6 defining the upper side of the downstream end of 88
32 are mounted on both sides of the rotation shaft 708 at a location where the roller 702 is mounted at a predetermined interval. That is, these return rollers 632 are connected to the projections 614 provided on the bottom wall 628.
More specifically, it is arranged corresponding to the right protruding horizontal short portion 630c (FIG. 2). The outer diameter of each return roller 632 is substantially the same as the outer diameter of roller 702, but the width of each of them is less than the width of roller 702.

Therefore, each return roller 632 acts on the upper surface of the copy paper being returned through the copy paper return path 588 and cooperates with the right protruding horizontal short portion 630C to direct the copy paper towards the collar, paper receiving and delivering means 590. and send it back.

On the other hand, the roller 702 located between the protrusions 614 hardly acts on the copy paper returned through the copy paper return path 588, but acts on the lower surface of the copy paper sent out from the copy paper receiving and sending means 590 to make a copy. It acts to transport the paper toward the paper transport path 558.

In the illustrated copying machine, since a return roller 632 that defines a part of the copy paper return path 588 is attached to the rotating shaft 708 on which the roller 702 of the copy paper double feeding prevention means 700 is attached, the copy paper The configuration of the return path 588 can be simplified. Also, in relation to the above,
Since the return roller 632 is arranged corresponding to the protrusion 614 and the roller 702 is arranged between the protrusions 614, the double feeding prevention function of the roller 702 and the friction pad 704 is not degraded.

As can be understood from FIG. 1, the above-mentioned copy paper receiving and sending means 590 receives the copy paper returned through the copy paper return path 588 into a copy paper holder (the front part of which is defined by the receiving plate 646, and the rear part of which is defined by the receiving plate 646). defined by the rear portion of the bottom wall 644 of the frame 642), and further allows for manual loading of sheet copy paper into the copy paper cradle through the opening 636 from outside the housing 502. I can do it. That is, when copying is performed on both sides of a copy paper, as will be described later, the copy paper receiving and sending means 590 receives the copy paper returned through the copy paper return path 588 as required, and then returns the copy paper to the copy paper return path 588. The copy paper is fed into the copy paper transport path 558 in the opposite direction to the copy paper return direction through 588. In order to ensure that the copy paper returned through the copy paper return path 588 is received within the frame 642 as required, in the specific example, a recess 720 is provided in the upper part of the front wall 694 of the frame 642 through which the copy paper passes. is formed. Additionally, the upper end of the rear wall 722 (FIG. 1) of the frame 642 projects slightly forwardly so that the copy paper does not protrude outward from the rear end of the frame 642 when received into the frame 642. Preferably, a protruding wall 724 (FIGS. 1 and 3) is provided. In addition, when manually loading copy paper, a frame body 6 protruding to the right from the right wall 634 of the housing 502 is provided.
The copy paper can be loaded as desired by inserting the copy paper into the frame 642 through the rear top surface of the copy paper holder and positioning it as desired on the copy paper holder. The copy paper receiving and delivering means 590 then feeds the manually loaded copy paper to the copy paper transport path 558.

Next, referring mainly to FIG. 5, the control system of the illustrated copying machine will be explained. The illustrated copying machine includes control means 726 for controlling the various elements of the copying machine as described above. And in relation to the control means 726,
The copying machine is equipped with a tH')4 handler 28 as shown in FIG. That is, the operation panel 728 includes a copy start button 7301, a copy number display section 732, a clear button 734 for returning the copying machine to its initial state, a manual switch means 736 for copy paper size selection, and a manual selection switch means 73.
8 and copy mode selection switch means 740. The illustrated copy paper size selection manual switch means 736 includes:
3 switches 742. '744 and 746. The switch 742 is for setting the interval between the width regulating members 674a and 674b in the copy paper receiving and sending means 590 to, for example, JISAJ size.
4 sets the above-mentioned interval to, for example, JTSBA size, and switch 746 sets the above-mentioned interval to JIS size, for example.
This is set to Bs size. Furthermore, the manual selection switch means 738 includes two switches 748 and 750, associated with each of which are associated indicator lamps 752 and 754, respectively. The switch 748 is connected to the copy paper supply means 5 located on the upper side.
The switch 750 is for feeding the copy paper from the copy paper receiving and sending means 590 located at the lower side.
This is for feeding copy paper from. Furthermore, the copy mode selection switch means 740 includes two switches 7
56 and 758, and these switches 756 and 75
8, indicator lamps 760 and 762 are provided, respectively. Switch 756 sets the copy mode to single-sided copying, and switch 758 sets the copy mode to double-sided copying. Copy start button 7 above
30, the signals from the clear button 734, the copy paper size selection manual switch means 736, the manual selection switch means 738, and the copy mode selection switch means 740 are transmitted to the control means 7.
26. The control means 726 controls the electromagnetic solenoids 608 and 716 based on the various signals described above.
, stepping motors 662 and 682, and indicator lamps 752, 754° 760 and 762 are controlled as follows. Further, the control means 726 of the specific example is configured such that the return prevention means 76 is configured such that the copy paper can be manually loaded onto the copy paper holder of the copy paper receiving and sending means 590.
Contains 4.

Next, referring mainly to FIGS. 1, 3, and 5,
The illustrated copying machine mainly includes copy paper receiving and delivering means 590
Outline the effects of.

In the case of single-sided copying, press switch 756 twice to set the copy mode to single-sided copying. Thus, switch 7
Based on the signal from 56, control means 726 sets the single-sided copy mode and lights lamp 760 to indicate this.

In single-sided copying, if the user desires to supply copy paper from the copy paper supply means 548, the switch 748 is pressed. Then, based on the signal from the switch 748, the control means 726 allows paper to be fed from the copy paper supply means 548, and lights up the lamp 752 to indicate this fact. Next, when the copy start button 730 is pressed, the copying process of the copying machine is started, and the copy paper is transferred from the copy paper cassette 550 to the copy paper transport path 558 by the action of the delivery roller 554.
will be sent to.

On the other hand, when it is desired to supply copy paper from the copy paper receiving and sending means 590 (for example, when it is desired to copy on copy paper of a different size from the copy paper stored in the copy paper cassette 550), the switch 750 is turned on. Press. Then, the control means 726 allows paper to be fed from the copy paper receiving and sending means 590 and lights up the lamp 754 to indicate this.Next, the manual switch means 736 for copy paper size selection is operated to start copying. The interval between the width regulating members 674a and 674b in the paper receiving and sending means 590 is set to a desired interval. That is, for example, if you wish to copy on JISA4 size (or JISBA size, JIS B S size) copy paper, press switch 742 (or 744° 746). In this way, switch 742 (or 744, 7
46), the control means 726 controls the operation of the stepping motor 682 as required. The stepping motor 682 causes the pinion 686 to move in the direction of the arrow 690 (
or when rotated in the direction indicated by 692, the moving member 68
4a and 684b and bin members 676a and 676b
The pair of width regulating members 674a and 674b are moved outward (or inward) in the width direction to increase (or decrease) the distance between them, and thus the width regulating members 674a and 674b are moved outward (or inward) in the width direction, and thus the width regulating members 674a and 674b are moved outward (or inward) in the width direction. Copy paper receiving and delivering means 5 is positioned at a position corresponding to the size of the paper.
Copy paper is loaded into the frame 642 of 90 as required. Such copy paper loading is accomplished by positioning the copy paper as desired on the copy paper cradle through the rear upper surface of the frame 642 projecting from the housing 502, as described above. When loading copy paper, use the receiving plate lifter fi65 B.
The rising members 668a and 668b are in the non-operating position and the receiving plate 646 is held in the receiving position, and the width gauge members 674a and 6
Since the spacers 74b are set at predetermined intervals, the above-mentioned copy paper can be easily loaded. Thereafter, when the copy start button 730 is pressed, the receiving plate 646 is raised as required to start the copying process. That is, based on a signal from the copy start button 730, the control means 726 energizes the stepping motor 662 to rotate the support shaft 666 substantially 90 degrees. Thus, the rising members 668a and 66
8b is located at the operating position and raises the front portion of the receiving plate 646, causing the copy paper on the receiving plate 646 to be pressed against the feeding roller 696. Thereafter, when the feed roller 696 is rotated, the copy paper is fed from the frame 642 to the copy paper delivery path 592 by the action of the feed roller 696 . and,
The thus fed copy sheets are fed one by one toward the copy paper transport path 558 under the double feed prevention action of the copy paper double feed prevention means 706. Note that the electromagnetic solenoid 716 of the double feeding prevention means 706 is energized by pressing the copy start button 730. In this way, the pivot support member 712 moves as shown by the arrow 718
(FIG. 4), the friction pad 704 is positioned at the operating position and acts on the roller 702, and in this state the copy paper is conveyed between the roller 702 and the friction pad 704.

If you want double-sided copying instead of single-sided copying, press switch 7.
Press 58 to set the copy mode to double-sided copy. Thus, based on the signal from the switch 758, the control means 7
26 is set to the double-sided copy mode ffE, and the lamp 762 is turned on to indicate this. That is, the control means 726 controls the electromagnetic solenoid 60 based on the signal from the switch 758.
8 is energized. When the electromagnetic solenoid 608 is energized,
1, the plate member 596 of the passage control means 578 is rotated about the support shaft 598 and positioned at the second position,
Copy paper is allowed to be returned through a copy paper return path 588.

Next, switch 748 is pressed. Thus, as described above, the control means 726 controls the copy paper supply means 548.
The paper feed is permitted, and the lamp 752 is turned on to indicate this. At this time, when the switch 750 is pressed instead of the switch 748, the control means 726 allows the paper to be fed from the copy paper receiving and sending means 590, and the lamp 7 is turned on.
At the same time, the return prevention means 764 of the control means 726 generates a return prevention signal, and based on the return prevention signal, the electromagnetic solenoid 60 is activated.
8 is deenergized and the lamp 762 is turned off. When the electromagnetic solenoid 60B is deenergized, the transport control jil1 means
The plate member 596 of 578 is returned to the first position to ensure that the copy paper is not returned through the copy paper return path 558.

Next, when the copy start button 730 is pressed, the copying process of the copying machine is started. When the copying process is started, if the switch 748 is pressed in advance (copy paper supply means 54
8), the copy paper is fed from the copy paper cassette 550 to the copy paper conveyance path 558 by the action of the delivery roller 554, and the copy paper is transferred from the copy paper conveyance path 558 to the conveyance control means 578. The copy paper is inserted into the plate member 596 and introduced into the copy paper return path 588. On the other hand, when the switch 75G is pressed in advance (when paper feeding from the copy paper receiving and sending means 590 is allowed), the copy paper is sent from within the frame 642 to the copy paper transport path 558 by the action of the feeding roller 696. (only when there is copy paper on the copy paper holder), and the copy paper is ejected out of the housing 502 through the copy paper transport path 558 and the copy paper discharge path 584.

The copy paper is supplied from the copy paper supply means 548 to the copy paper return path 5.
The copy paper introduced at 88 passes through a copy paper return path 588 and is received by copy paper receiving and delivering means 590 . When a copy sheet is received, the lifting members 668a and 668b of the receiving plate lifting means 658 are in the non-operating position and the receiving plate 646 is held in the receiving position, and therefore,
The copy paper passes through a recess 720 formed in the front wall 694 of the frame 642 and is received onto the copy paper holder.

Once accepted, the control means 726 then controls the operation of the stepping motor 682 to reciprocate the width regulating members 674a and 674b in the width direction. That is, first, the stepping motor 682 moves the pinion 686 in the direction of the arrow 6.
The width regulating member 674 is rotated in the direction indicated by 92 (Fig. 3).
a and 674b inward in the width direction to align the widthwise position of the copy paper on the copy paper holder, and then
6 in the direction shown by arrow 690 (FIG. 3) to move width regulating members 674a and 674b in the width direction. Then, when the copy paper is received as required, the control means 7
26 deenergizes the electromagnetic solenoid 608. Thus,
The plate member 596 of the conveyance control means 578 is positioned at the first position.

Thereafter, when the copy start button 730 is pressed again to copy the other side of the copy paper, the copying process is restarted and the receiving plate 646 of the copy paper receiving and delivering means 590 is raised as required. That is, the control means 726 controls the stepping motor 6 based on a signal from the copy start button 730.
62 to rotate support shaft 666 substantially 90 degrees.

Then, in the same way as described above, the raising members 668a and 668b are located in the operating position to raise the front part of the receiving plate 646, and the copy paper on the receiving plate 646 is moved to the feeding roller 696.
Press it down. Thereafter, when the feeding roller 696 is rotated, the copy paper is fed from the frame 642 to the copy paper delivery path 592 by the action of the feeding roller 696. At this time, as can be understood from FIG. 1, the copy paper is passed through the copy paper return path 558 in the opposite direction to the direction in which the copy paper is returned, and through the copy paper transport path 558 with the side on which the image is formed facing down. The copy paper is then fed to the copy paper delivery path 592. Then, the copy paper thus fed is transferred to the copy paper double feed prevention means 7.
The electromagnetic solenoid 716 of the double-feed prevention mechanism 706 is activated by the copy start button 730 in order to copy on the other side. ).

In the copying machine described above, the copy paper receiving and sending means 5
When supplying copy paper from 90, the conveyance control means 578
If desired, the copy paper supply means 548
Even when copy paper is present in the copy paper receiving and sending means 590 at the start of supply in the case of supplying copy paper from
Similarly, the transport control means 578 can be configured such that it is never positioned in the second position.

In the copying machine described above, the copy paper receiving and sending means 5
90 not only receives the copy paper returned through the copy paper return path 588 and feeds the copy paper to the copy paper transport path 558, but also allows copy paper to be loaded from outside the housing 502, and this loaded It also functions to feed the copied paper to the copy paper transport path 558. Therefore, this copy paper receiving and delivering means 590 can be effectively used to supply new copy paper to the copy paper transport diameter 6558, and therefore, without increasing the number of copy paper supply means 548, the copy paper Copying efficiency can be improved when an image is formed on one side of paper.

[Brief explanation of drawings]

FIG. 1 is a simplified sectional view showing a specific example of a copying machine constructed according to the present invention. 2 is a partial perspective view showing a copy paper return path of the copying machine shown in FIG. 1; FIG. FIG. 3 is a partially cutaway perspective view of the copy paper receiving and delivering means of the copying machine shown in FIG. 1; FIG. 4 is a partial perspective view showing copy paper double feeding prevention means of the copying machine of FIG. 1. FIG. 5 is a schematic plan view showing a part of the control system of the copying machine shown in FIG. 1 in a simplified manner. 6 is a front view showing a part of the operation panel of the copying machine shown in FIG. 1; FIG. 502... Housing 508... Rotating drum 518... Transfer area 522... Charging corona discharger 524... Developing device 534... Optical system 548... Copy paper supply means 558... Copy paper transport path 578...Transport control means 588...Copy paper return path 590...Copy paper receiving and sending means 642...Frame 646...Receiving plate 700...Copy paper mold prevention means 726...Control means 728...Operation panel Patent applicant Sanda Kogyo Co., Ltd. Agent Patent attorney Hisashi Ono Net amount Patent attorney Tadashi Kishimoto Figure 5 Figure 6

Claims (1)

[Claims] 1. A housing, a photoreceptor disposed within the housing, an image forming means for forming an image on the photoreceptor, and an image forming means defined within the housing and on the photoreceptor. a copy paper transport path extending through a transfer area in which an image of the image is transferred to a sheet of copy paper; a copy paper return path defined within the housing;
a conveyance control means selectively positioned at a first position for discharging the copy paper conveyed through the copy paper conveyance path out of the housing and a second position for guiding the copy paper to the copy paper return path; Disposed adjacent to the downstream end of the copy paper return path, capable of receiving copy paper returned through the copy paper return path, and in a direction opposite to the direction of copy paper return through the copy paper return path. In a copying machine, the copy paper receiving and delivering means is capable of feeding a sheet of copy paper to an upstream end of the copy paper transport path; the copy paper receiving and delivering means is detachably attached to the housing. a copy paper cradle mounted and at least partially projecting outside the housing, wherein copy paper returned through the copy paper return path is received in the copy paper cradle and also extends outside the housing. A copying machine characterized in that a sheet of copy paper can be manually loaded onto the copy paper holder. 2. The copy paper receiving and delivering means includes a copy paper feed roller rotatably mounted above the copy paper holder and selectively rotated, and the copy paper holder is detachable from the housing. The copy paper receiving and discharging means further comprises: a freely mounted frame; and a receiving plate mounted on the frame such that it can rise freely from a receiving position spaced downwardly from the copy paper feeding roller; 2. The copying machine according to claim 1, further comprising receiving plate lifting means for selectively raising the receiving plate to press the copy paper on the receiving plate against the feeding roller. 3. The copying machine according to claim 2, wherein the receiving plate lifting means is attached to the frame. 4. The receiving plate raising means includes a lifting member mounted so as to be movable between a non-operating position for bringing the receiving plate into the receiving position and an active position for raising the receiving plate, and a raising member for moving the raising member into the non-operating position. 4. A copying machine as claimed in claim 3, comprising a position and a lifting member positioning means for selectively positioning the operative position. 5. Claim 2, wherein at least one width regulating member is mounted on the upper surface of the receiving plate so as to be movable in the width direction.
The copying machine according to any one of items 1 to 4. 6. The copying machine according to claim 5, wherein a pair of width regulating members are mounted on the upper surface of the receiving plate so as to be movable in the width direction. 7. The copying machine according to claim 5 or 6, wherein the copy paper holder is equipped with a moving means for moving the width regulating member in the width direction. 8. The copying machine according to claim 7, wherein the moving means is mounted on the lower surface of the receiving plate. 9. Claim 7 or 8, comprising a manual switch means for selecting copy paper size, and a control means for operating the moving means in response to manual operation of the manual switch means.
Copying machine mentioned in section. 10. A copy paper delivery path extending from the copy paper receiving and delivery means to an upstream end of the copy paper transport path is disposed within the housing, and a copy paper delivery path is provided in the copy paper delivery path to prevent copy paper double feeding. A copying machine according to any one of claims 1 to 9, further comprising means. 11. The copy paper double feeding prevention means has a rotating shaft rotatably mounted, a roller mounted on the rotating shaft, an active position pressed by the roller, and a non-active position separated from the roller. The friction pad is made of a material having a high coefficient of friction and is mounted so as to be movable between the friction pads, and a friction pad positioning means for selectively positioning the friction pad in the working position and the non-working position. , a copying machine according to any one of claims 1 to 10. 12. The copy paper return path extends below the copy paper transport path and the copy paper delivery path, and the rotating shaft of the double feed prevention means includes a top surface of the copy paper at the downstream end of the copy paper return path. 12. The copying machine according to claim 11, wherein a plurality of return rollers are mounted at intervals in the width direction. 13. The housing includes a synthetic resin bottom wall, and a plurality of protrusions are integrally formed on the upper surface of the bottom wall at intervals in the width direction, defining the lower side of at least a portion of the copy paper return path. each of the plurality of return rollers is arranged corresponding to each of the plurality of protrusions, and the copy paper is returned by cooperation of the return roller and the protrusion. A copying machine according to claim 12. 14. The conveyance control means includes a plurality of plate members disposed at intervals in the width direction, and when the plate members are positioned at the first position, the copies conveyed through the copy paper conveyance path When the paper is guided by the upper edge of the plate member and ejected out of the housing, and the plate member is positioned in the second position, the copy paper conveyed through the copy paper transport path is placed in front of the plate member. The copying machine according to any one of claims 1 to 13, wherein the copy paper is guided to the copy paper return path by being guided by an edge. 15. Inside the housing, a rotating shaft is rotatably mounted above the plate member, and a plurality of discharges are mounted on the rotating shaft at intervals in the width direction corresponding to each of the plate members. When a roller is provided and the plate member is positioned in the first position, the copy paper conveyed through the copy paper transport path is transported by the cooperation of the discharge roller and the upper edge of the plate member. 15. The copying machine according to claim 14, wherein the copying machine is discharged from the housing. 16. Copy paper supplying means for supplying a sheet of copy paper to the upstream end of the copy paper conveyance path, a copy paper supplying operation to the copy paper conveyance path by the copy paper supply means, and receiving and sending out of the copy paper. a manual selection switch means for selectively permitting either a copy paper feeding action to the copy paper transport path by the means; and a manual selection switch means for selectively allowing a copy paper feeding action to the copy paper transport path by the copy paper supply means; , when the transport control means is selectively positioned in the first position and the second position, the copy paper receiving and delivering means does not allow copying onto the copy paper transport path. Any one of claims 1 to 15, further comprising return prevention means for preventing the conveyance control means from being positioned at the second position when the paper feeding action is permitted. Copying machine described in . 17. a housing, a photoreceptor disposed within the housing, and an image forming means for forming an image on the photoreceptor;
a copy paper transport path defined within the housing and extending through a transfer area where the image on the photoreceptor is transferred to a sheet of copy paper; a copy paper return path defined within the housing; and the copy paper a conveyance control means selectively positioned at a first position for discharging the copy paper conveyed through the conveyance path out of the housing and a second position for guiding the copy paper to the copy paper return path; and the copy paper Disposed adjacent to the downstream end of the copy paper return path, capable of receiving the copy paper returned through the copy paper return route, and feeding the copy paper to the upstream end of the copy paper transport path through the copy paper delivery route. In a copying machine, the copy paper receiving and discharging means is provided with: a rotary shaft rotatably mounted in the copy paper discharging path; a roller mounted on the rotary shaft; a friction pad made of a material having a high coefficient of friction and mounted so as to be movable between a working position where the roller is pressed and a non-working position separated from the roller; friction pad positioning means for selectively positioning the copy sheet, the copy paper return path extending below the copy paper transport path and the copy paper delivery path; A copying apparatus characterized in that a plurality of return rollers that act on the upper surface of the copy paper at the downstream end of the copy paper return path are mounted on the rotating shaft of the prevention means at intervals in the width direction. Machine. 18. The housing includes a synthetic resin bottom wall, and a plurality of protrusions are integrally formed on the upper surface of the bottom wall at intervals in the width direction to define the lower side of at least a portion of the copy paper return path. each of the plurality of return rollers is arranged corresponding to each of the plurality of protrusions, and the copy paper is returned by cooperation of the return roller and the protrusion. A copying machine according to claim 17. 19. a housing, a photoreceptor disposed within the housing, and an image forming means for forming an image on the photoreceptor;
a copy paper transport path defined within the housing and extending through a transfer area where the image on the photoreceptor is transferred to a sheet of copy paper; a copy paper return path defined within the housing; and the copy paper a conveyance control means selectively positioned at a first position for discharging the copy paper conveyed through the conveyance path out of the housing and a second position for guiding the copy paper to the copy paper return path; and the copy paper A copying machine disposed adjacent to the downstream end of the copy paper return path, capable of receiving copy paper returned through the copy paper return route, and capable of feeding the copy paper to the upstream end of the copy paper transport path. In a copying machine, the conveyance control means includes a plurality of plate members arranged at intervals in the width direction, and when the plate members are positioned at the first position, , the copy paper conveyed through the copy paper conveyance path is guided by the upper edge of the plate member and discharged out of the housing, and when the plate member is positioned at the second position, the copy paper is conveyed through the copy paper conveyance path. A copying machine characterized in that the transported copy paper is guided by the front edge of the plate member and led to the copy paper return path. 20. Inside the housing, a rotating shaft is rotatably mounted above the plate member, and a plurality of discharges are mounted on the rotating shaft at intervals in the width direction corresponding to each of the plate members. When a roller is provided and the plate member is positioned in the first position, the copy paper conveyed through the copy paper transport path is transported by the cooperation of the discharge roller and the upper edge of the plate member. 20. The copying machine according to claim 19, wherein the copying machine is discharged from the housing. 21. A housing, a photoreceptor disposed within the housing, and an image forming means for forming an image on the photoreceptor;
a copy paper transport path defined within the housing and extending through a transfer area where the image on the photoreceptor is transferred to a sheet of copy paper; and a copy paper transport path defined within the housing and at a downstream end of the copy paper transport path. a copy paper return path extending below the copy paper transport path from an upstream end located adjacent thereto; and a first position for discharging the copy paper conveyed through the copy paper transport path out of the housing. and a second position for directing the copy paper return path to the copy paper return path; In a copying machine comprising copy paper receiving and delivering means capable of receiving copy paper and feeding the copy paper to an upstream end of the copy paper transport path; the housing including a bottom wall made of synthetic resin; , a copying machine characterized in that a plurality of protrusions defining the lower side of at least a portion of the copy paper return path are integrally formed on the upper surface of the bottom wall at intervals in the width direction. .