JPH0799447B2 - Copier - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, and more particularly to an electrophotographic copying machine capable of double-sided copying and composite copying.

2. Description of the Related Art In recent years, copiers having various functions have been developed, which include double-sided copying in which both sides of a copy sheet are copied, different images on one side of the copy sheet (for example, a frame and characters in a frame). Synthetic copying is known in which copying is performed with different color toners. In order to execute this type of function, it is necessary to send the copy paper after copying once onto the intermediate tray and re-feed it, and in double-sided copying, the copy paper sent to the intermediate tray is inverted. There is a need.

Therefore, conventionally, as shown in, for example, Japanese Patent Application Laid-Open No. 58-35553, a path switching device for copying paper is provided at the place where it exits the fixing device so that the copying paper sent out from the fixing device is temporarily used for double-sided copying. There is provided a device which is fed into an upper reversing passage and is so-called switched back so as to be fed in an inverted state onto an intermediate tray.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the case of the above switchback method, it is necessary to dispose the reversing path in a direction orthogonal to the path of the copy paper conveying path, which deteriorates the space efficiency inside the copying machine and makes a copy. There is a problem in that a time loss occurs in the transportation of the paper and the copying speed decreases. Further, since the reversing passage is incorporated inside the copying machine, there is a problem in that if a paper jam occurs, the work of removing the jam will be very complicated.

Further, even if the reversing passage can be pulled out from the main body of the copying machine to remove the paper jam, separate pulling mechanisms and locking mechanisms are required for the intermediate tray and the reversing passage, which complicates the configuration and deteriorates operability. Have a point.

Therefore, a copying machine according to the present invention includes an intermediate tray and an intermediate tray extending from one end to the other end of the intermediate tray for reversing copy paper after copying and feeding it onto the intermediate tray. First conveying means installed immediately above, second conveying means for feeding the copied copy paper from the other end of the intermediate tray into the intermediate tray without reversing the copy paper, and copy paper sent on the intermediate tray And a support for supporting the intermediate tray, the first transporting means, the second transporting means, and the re-feeding means as an integral unit so as to be pulled out from the copying machine main body to the front side. Means and the first transporting means so that the first transporting means can be opened above the intermediate tray with the copy paper entrance side of the first transporting means serving as a fulcrum when the unit is pulled out from the copying machine main body. A connecting means that is rotatably connected to the first transfer means, and an engaging portion that is rotatably provided on the first conveying means and is provided on the copying machine main body when the unit is located inside the copying machine main body; A lock lever that engages with the front side and the back side and locks the unit, the copying machine main body, the intermediate tray, and the first conveying means at the same time.

Embodiment An embodiment of a copying machine according to the present invention will be described below with reference to the accompanying drawings.

[Overall Configuration of Copying Machine, See FIG. 1] First, the overall configuration of the copying machine will be described together with the copying operation.

This copying machine includes a copy paper storage section and a paper feed section in the lower section, an intermediate tray unit (A) directly above the copy paper storage section, an image forming section centered on the photosensitive drum (2) in the middle section, and an upper section. The optical system (1) is installed in the system, and double-sided copying and composite copying are possible by feeding the copied copy paper to the intermediate tray unit (A) and feeding it again.

The photosensitive drum (2) is rotatable in the direction of the arrow (a), and a charging charger (6), a magnetic brush type developing device (3), a transfer charger (5a), a separation charger (5b) are provided around the photosensitive drum (2). A blade type cleaning device (4) and an eraser lamp (7) are sequentially arranged. The photoconductor drum (2) is uniformly charged by the charger (6) as it rotates in the direction of the arrow (a), and is subjected to image exposure from the optical system (1) to form an electrostatic latent image. The latent image is developed into a toner image by the developing device (3).

The optical system (1) is shown below the platen glass (16) by an arrow (b).
Can be scanned in any direction and has a light source (10) and a movable mirror (11).
It is composed of a), (11b) and (11c), an imaging lens (12) and a fixed mirror (11d). The light source (10) and the movable mirror (11a) are (V / m) with respect to the peripheral velocity (V) of the photosensitive drum (2) (constant regardless of equal magnification or variable magnification).
(However, m: Copy magnification) moves integrally in the direction of arrow (b), and the movable mirrors (11b) and (11c) move in the direction of arrow (b) at the speed of (V / 2m). Moving.

On the other hand, the copy paper storage unit is composed of an upper elevator type storage unit (42) and a lower cassette type storage unit (43), both of which are rails (46), (47) and rails (48),
By (49), it can be pulled out from the main body of the copying machine to the front side. Copy paper in the storage section (42)
By the rotation of 8), the copy paper in the storage section (43) is selectively rotated by the rotation of the paper feed roller (19) so that either one of the separation rollers (20), (21), (22), (23 ), The paper is fed one by one, and the transport rollers (29), (30),
(31), (24), (25), (26), (32), (34) and (27), (28) are conveyed to the timing roller pair (13). The copy paper is temporarily stopped by the pair of timing rollers (13), then sent out to the transfer portion in synchronization with the image formed on the photosensitive drum (2), and discharged by the transfer charger (5a). While the toner image is transferred,
It is separated from the surface of the photoconductor drum (2) by the discharge of the separation charger (5b), and sent to the fixing device (9) by a conveyor belt (8) equipped with air suction means (8a).
The toner image is fused and fixed.

A lever (41) for switching the transfer path of the copy paper is installed between the conveying roller pair (14) and the discharge roller pair (15) provided immediately after the exit of the fixing device (9). If the copy paper is to be discharged as it is, the lever (41) is set to the state shown by the alternate long and short dash line in FIG. 1, and the fixing device (9) is set.
The copy paper sent from the tray is discharged onto the tray (36) from the discharge roller pair (15). Also, in the case of performing double-sided copying or composite copying (described in detail below), the lever (41) is set to the solid line state, and the copy paper is fed from the pair of transport rollers (35) through the guide plate (37). It is fed into the intermediate tray unit (A) described in detail below.

On the other hand, the residual toner is removed from the photosensitive drum (2) after the transfer by the cleaning device (4) and the residual charge is removed by the light irradiation of the eraser lamp (7) to prepare for the next copying.

[Intermediate Tray Unit, See FIGS. 1 to 3] Next, a schematic configuration of the intermediate tray unit (A) will be described.

The intermediate tray unit (A) includes a switching block (I),
It is composed of a transport block (II), a reversing block (III), an alignment tray, an intermediate tray block (IV), and a re-feeding block (V), and is an integrated unit as a whole, with both ends It is supported by rails (44) and (45) and can be pulled out from the main body of the copying machine to the front side, that is, in the direction orthogonal to the copying paper conveyance path, as shown in FIG. The reason why the unit (A) can be pulled out from the main body of the copying machine is to facilitate various types of maintenance and paper jam processing.

By the way, the switching block (I) is provided with a conveyance roller (50),
(51) and a switching lever (59). The block (I) may be provided on the copying machine main body side instead of being provided on the intermediate tray unit (A).

The transport block (II) has transport rollers (52), (53), (5
5), composed of guide plates (201), (202), (203), (204), and can be opened upward with the support shaft (95) as a fulcrum when the unit (A) is pulled out forward. It is said that. The reason why the block (II) can be opened upward is to facilitate paper jam processing in the unit (A).

The reversing block (III) includes reversing conveyance rollers (56), (5
7), which is composed of a reversing guide plate (93) and has a function of reversing the copy paper conveyed in the conveyance block (II) and feeding it to the intermediate tray (58).

Alignment, Intermediate tray block (IV)
8), slide rail (77), slide member (73), (7
9), regulating plates (62), (63), (64), (65) (see FIG. 5) and has a function of aligning the copy paper fed onto the intermediate tray (58).

The re-feeding block (V) includes a holder (66), a re-feeding roller (38), separation rollers (39) and (40), and a guide plate (88), which are aligned on the intermediate tray (58). It is for re-feeding the copied copy sheets one by one.

In reverse copying or composite copying, when any one of the copying modes is selected by pressing the selection key on the operation panel (not shown) in advance, the switching lever (41) causes the switching lever (41) to move to the first position.
The copy sheet, which has been switched to the position indicated by the solid line in the figure and has been copied on one side, is guided by the guide roller (35) from the pair of conveying rollers (35) and conveyed to the conveying rollers (50), (51).

The other switching lever (59) is rotatable around the shaft (85) as a fulcrum, and is set to the state shown by the solid line in Fig. 3 during reverse copying, and the copy paper is guided by the upper surface of the lever (59). 3 is fed to the transport block (II) and guided by the guide plates (201), (203) and (204), and is transported by the transport rollers (52), (53), (54) and (55) in FIG. The sheet is conveyed to the left in the middle, inverted by the reversing conveying rollers (56) and (57) and the reversing guide plate (93), and is fed onto the intermediate tray (58) with the copied surface facing up. Then, the sheets are aligned on the intermediate tray (58) by the aligning function described in detail below, and are re-fed one by one by rotation of the re-feeding roller (38) in the clockwise direction.

On the other hand, at the time of composite copying, the switching lever (59)
Is set in the state indicated by the alternate long and short dash line in FIG. 3, and the copy paper is guided by the lower surface of the lever (59) immediately after passing the conveying rollers (50) and (51), and is directly copied onto the intermediate tray (58). It is sent with the finished side down. Then, the sheets are aligned on the intermediate tray (58) by the aligning mechanism described in detail below, and are re-fed one by one by the clockwise rotation of the re-feeding roller (38) as in the case of the reverse copying.

The re-fed copy paper is conveyed to the timing roller pair (13) through the conveyance rollers (32), (33) and (34) while being separated by the separation rollers (39) and (40). Double-sided copying or composite copying is performed in the same manner as the copying step of.
The re-feed roller (38) is the support shaft (86) of the holder (66).
It can be swung by being positioned in three steps with the fulcrum as a fulcrum (see the one-dot chain line, dotted line, and solid line in FIG. 1), and when the copy paper is fed onto the intermediate tray (58), as described in detail below. It is located in the upper stage or the middle stage, and when re-feeding, presses the aligned copy sheets on the intermediate tray (58) with proper pressure.

[Unit Lock Mechanism, See FIG. 4] Next, the unit lock mechanism will be described. This lock mechanism locks the unit (A) in the main body of the copying machine, the transport block (II) to the unit (A), and the upper transport rollers (55) to the lower transport rollers (5).
This is to keep the pressed state against 4).

The axis (101) is the frame (106) of the transport block (II),
It is rotatably attached to the (107) in a penetrating state, and an operation lever (100) is fixed to the front end. Also, the axis (1
Lock levers (102) and (103) are fixed to the outside of the frame (106, (107) of (01), and one end of the torsion springs (104) and (105) wound around the shaft (101) is the lock lever. Engage with (102), (103), and the other end is the frame (106),
The shaft (101) is biased in the direction of the arrow (c) together with the levers (100), (102) and (103) by being locked by the (107). At this time, lock levers (102), (10
The protrusions (102a) and (103a) of 3) are the lock holes (116a) and (117a) of the protrusions (116) and (117) of the body frame of the copying machine.
Urgingly engages from below to lock the unit (A) with respect to the main body of the copying machine and prevent the transport block (II) from being opened upward. In order to integrate the transport block (II) with respect to the unit (A) in the pull-out direction, the end bent portions of the frames (106) and (107) are unit (A).
Of the frames (113) and (114) are abutted from inside, and the support shaft (95) (see FIG. 3) is connected to the frames (113) and (114) at the engagement and the other end. Has been achieved by

Therefore, the operation lever (100) is twisted in the direction opposite to the arrow (c) from the state shown in FIG.
The lock levers (102), (103) are disengaged from the lock holes (116a), (117a) of the protrusions (116), (117) by rotating them against the spring force of (5). With this, the unit (A) can be pulled out from the main body of the copying machine to the front side. At the same time, the lock of the transport block (II) is also released, and the transport block (II) can be opened upward with the support shaft (95) as a fulcrum. When the transfer block (II) is opened upward, the transfer block (II) is moved to the third position by a stopper member (not shown) provided on the unit (A) side.
It is designed so as to be prevented from swinging beyond the position indicated by the one-dot chain line in the figure. That is, this locking mechanism can lock the unit (A) and the transport block (II) by one mechanism.

By the way, the lower conveying roller (54) is attached to the frames (113) and (114) of the unit (A) through the bearings (111) and (112), and is driven by an unillustrated driving means (arrow (d)).
It can be rotationally driven in any direction. The bearings (108) and (109) at both ends of the upper carrying roller (55) play in guide holes (106a) and (107a) formed vertically in the frames (106) and (107) of the carrying block (II). When fitted, the coil springs (110) and (115) mounted on the outside of the frames (106) and (107) can move up and down and rotate freely, and the bearings (108) and (1
It is biased downward by engaging 09) from above. Therefore, the transport roller (55) is the transport block (II).
Is locked to the unit (A), the coil springs (110) and (115) are pressed against the lower conveying roller (54) with a certain appropriate pressure by the spring force of the coil springs (110) and (115) to convey the conveying roller (54).
The driven rotation is based on the rotation of. When the lock is released and the transport block (II) is opened, the coil spring (11
The spring forces of 0) and (115) cause the bearings (108) and (109) to contact the lower edges of the guide holes (106a) and (107a).
The pressure contact with the transport roller (54) is released.

In this way, the lower transport roller (54) is connected to the unit (A).
It is provided on the main body side in order to drive a driving force transmission mechanism (not shown) to the conveying roller (54) by a mechanism common to other driving members of the unit (A). If the carrying roller (54) is provided on the carrying block (II) side, it is necessary to set the driving mechanism of the carrying roller (54) to be separable from the driving mechanism provided in the unit (A). Because it will be. Along with this, a means for pressing the carrying roller (55) against the carrying roller (54) at an appropriate pressure is required. Therefore, the coil spring (11) serves as an elastic biasing means.
0), (115), and a lock mechanism stage for positioning and fixing the transport block (II) at a predetermined position.

[Copy Paper Alignment Mechanism, See FIGS. 5 to 8] Next, the copy paper (81) sent onto the intermediate tray (58).
The matching mechanism will be described.

In FIG. 5, the arrow (e) indicates that the copy paper is the intermediate tray (5
8) The direction in which the image is sent to the reverse copy holder, and the arrow (f) similarly indicates the direction in which the image is sent during composite copying. The arrow (g)
Indicates the re-feeding direction.

The four regulation plates align the copy paper (81), and the side regulation plate (62) can swing about the support shaft (68) as a fulcrum, and another side regulation plate (63). And tip regulation plate (64)
And the rear end regulating plate (65) are slide rails (72), (77)
It is installed via slide members (71), (73), (79) on the top, and each slide member (71), (73), (79) is driven by a stepping motor (not shown), It can be moved in the directions of arrows (g), (g '), (h), and (h'). Then, this movement amount is set to a predetermined value by controlling the rotation angle of the stepping motor.

As shown in FIG. 6, the tip regulation plate (64) is swingably attached to the slide plate (73) about the support shaft (74) and twisted around the support shaft (74). The slide member (73) is normally urged by the spring (75) in the direction of the arrow (i).
At the lower edge (73a) of the protrusion (see FIG. 7) of the intermediate tray (5
It is regulated to be perpendicular to 8). This tip regulation plate (64) is located at the position shown in FIG.
The leading edge of the copy paper (81) fed above is aligned. At the time of re-feeding, the slide member (73) moves in the direction of the arrow (g), and the lower end of the tip regulation plate (64) is supported by the stopper (78) as shown in FIG. With the shaft (74) as a fulcrum, it swings in the direction of the arrow (i ') against the spring force of the torsion spring (76) and the notch (88) of the guide plate (88).
It is possible to re-feed the copy paper (81) by retracting into a) and (88a).

The leading edge regulating plate (64) is provided at each position of the re-feeding position shown in FIG. 8, the leading edge aligning position shown in FIG. 7, and a temporary aligning position (differs depending on the copy paper size) at the time of composite copying, which will be described in detail below. It is movable, and its position control is such that the projection piece (73a) of the slide member (73) is the transmission type photo sensor (83) in the state shown in FIG.
It is based on what is detected in. Similarly, as for the position regulation of the trailing edge regulation plate (65), as shown in FIG. 6, the projection piece (79a) of the slide member (79) is a transmission type photosensor (8
It is performed based on what is detected in 4). The position control of the side part regulation plate (63) is also similar to the transmission type photo sensor (82).
This is performed based on the detection of the fixed position of the slide member (71) (see FIG. 18).

Further, as shown in FIG. 5, the side regulating plate (62) is connected to the solenoid (70) and also has a coil spring (6).
9) is pressed in the direction of the arrow (h), the solenoid (70) is normally turned off, and it is regulated by a stopper (not shown) and is in the dotted line position. When re-feeding, the holder (66) of the re-feeding roller (38) is ) Is abutted on the stopper (91) that is provided so as to project to the position indicated by the solid line. Further, when the solenoid (70) is turned on, the solenoid (70) swings against the spring force of the coil spring (69) about the support shaft (68) as a fulcrum to the position indicated by the alternate long and short dash line.

[Refeed Roller Swing Mechanism, See FIGS. 10 to 15] Next, the configuration and operation of the swing mechanism of the refeed roller (38) will be described.

As shown in FIG. 10, the refeed roller (38) is attached to the holder (6
The holder (66) is cantilevered by a support shaft (87) that is rotatably attached to the unit (6), and the holder (66) is a frame (11) of the unit (A).
3), (114) (see FIG. 4) are fixed at their rear ends to a spindle (86) rotatably mounted. The support shaft (86) is rotationally driven in the direction of the arrow (j) by a driving means (not shown), and this rotation is performed by the pulleys (126), (1) fixed to the support shafts (86), (87).
It is transmitted to the re-feeding roller (38) via a timing belt (128) stretched over the sheet 27). That is, the support shaft (86) is connected to the driving means of each conveying roller of the unit (A) by a clutch (not shown), and the re-feeding roller (38) is turned on only when the clutch is turned on at the re-feeding timing. It is rotationally driven in the direction of arrow (j).

A swing lever (145) is swingably attached to one end of the support shaft (86), and a shaft (145a) protruding from one end is attached to a holder (6).
The elongated hole (145b) formed at the other end is opposed to the projecting piece (66a) of 6) from below, and projects into the clutch plate (124) rotatably mounted on the support shaft (54a) of the conveying roller (54). Set pin (1
25) is loosely fitted. As shown in Fig. 12, the spindle (54
Another clutch plate (121) is fixed to the end of a), a kick spring (122) is wound around each boss part of the clutch plates (121) and (124), and further around the outer peripheral part thereof. Collar (12) having claws (129), (130), (131)
3) is installed. One end (122a) of the kick spring (122) is engaged with the collar (123), and the other end (122b) is engaged with the clutch plate (124). That is, when the kick spring (122) is free, the clutch plate (121),
Tighten the boss portion of (124) to rotate the support shaft (54a) in the direction of the arrow (d) from the clutch plate (121) to the clutch plate (124),
Transmit to color (123). On the other hand, when the rotation of the collar (123) is blocked by the lever (142) described below, the rotation in the direction of the arrow (d) transmitted from the support shaft (54a) to the clutch plate (121) is the kick spring. The clutch plate (121) slips and rotates with respect to the kick spring (122) by the action of rewinding the (122) and the clutch plate (12).
No rotational force is transmitted to 4).

As shown in FIG. 10, the means for activating the clutch means is a solenoid (140) mounted on a mounting plate (141).
And lever (142). The lever (142) is swingably attached to the support shaft (144), and is constantly urged in the direction of arrow (k) by the spring force of the torsion spring (143) wound around the lever (142). 10 The position is restricted to the solid line in the figure. Also, the lever (142) has a solenoid (14
It is connected to the plunger (140a) of (0), and when it is turned on, the plunger (140a) retracts and swings to the position indicated by the alternate long and short dash line. The tip of the lever (142) is located on the rotation locus of the claws (129), (130), (131) of the collar (123), and as shown in FIG. 12, the lever (142) is at the solid line position. When set, the claws (129), (131) can come into contact with each other, and when set in the alternate long and short dash line position, the claws (130) can come into contact with each other.

Here, the operation of the clutch means, the swing lever (145) and the position of the re-feeding roller (38) associated therewith will be described separately for the upper stage, the middle stage and the lower stage.

Upper position (one-dot chain line position in FIG. 11) The solenoid (140) is turned off, and the claw portion (129) of the collar (123) is in contact with the lever (142) in the direction of the arrow (d). At this time, the collar (123) is in a rotation-stopped state, and even if the transport roller (54) is rotationally driven in the direction of the arrow (d), the rotation is not transmitted to the clutch plate (124), The swing lever (145) has a pin (12
In 5), it is held at the position (B) shown by the alternate long and short dash line in FIG. Then, the holder (66) is lifted by the shaft (145a) of the swing lever (145) and swings upward with the support shaft (86) as a fulcrum, and the re-feed roller (38) is one point in FIG. It is located in the upper part shown by the chain line. Copy paper for double-sided copying (81)
When the sheet is fed from the reversing block (III) onto the intermediate tray (58), the sheet re-feeding roller (38) is set on this upper stage (see FIG. 13).

Middle position (dotted line position in FIG. 11) When the solenoid (140) is turned on while the transport roller (54) is rotationally driven in the direction of arrow (d), the pawl (129) causes the lever (142) to move. Is released from contact with. At this time, the kick spring (122) engages the clutch plate (12
Tighten the bosses of 1) and (124) to attach the clutch plate (124),
The collar (123) co-rotates in the direction of the arrow (d), and the other claw (130) abuts the lever (142) to prevent the collar (123) from rotating and also the clutch plate (124). It will be stopped. That is, the collar (123), the clutch plate (1
24) rotates in the direction of the arrow (d) from the claw portion (129) by an angle corresponding to the protruding interval of the claw portion (130), and the swing lever (145).
Together with the pin (125) swings in the direction opposite to the arrow (j) and is held at the position (C) shown by the dotted line in FIG. The holder (66) also swings downward in conjunction with the shaft (145a), and the re-feed roller (38) is positioned in the middle stage shown by the dotted line in FIG. At the time of composite copying, the copy paper (81) is the conveyance roller (50),
When the paper is fed from the (51) onto the intermediate tray (58), the re-feed roller (38) is set in this middle stage (see FIG. 14). In this way, the refeed roller (38) and the holder (66)
Is set in the middle stage so that when the copy paper (81) aligned on the intermediate tray (58) is conveyed to the refeed position, the tip of the copy paper (81) curls upward and pops out. This is to prevent the re-feed roller (38) and the holder (66).

Lower position (solid line position in FIG. 11) When the solenoid (140) is turned off in the above state, the claw portion (130) is released from contact with the lever (142). At this time, the clutch plate (124) and the collar (123) co-rotate in the direction of the arrow (d) due to the tightening force of the kick spring (122) until the other claw (131) contacts the lever (142), and shakes. The moving lever (145) swings together with the pin (125) in the direction opposite to the arrow (j) and is held at the position (D) shown by the solid line in FIG. At this time, swing lever (14
The shaft (145a) of 5) moves below the protrusion (66a) of the holder (66), and the refeed roller (38) is under its own weight in the tray (58).
Press on top. The re-feed roller (38) is set to this lower position when the copy paper (81) is aligned and re-fed on the intermediate tray (58), and the re-feed roller (38) is set. ) Is pressed against the copy paper (81) aligned on the intermediate tray (58) by its own weight and is re-fed one by one by rotation in the direction of the arrow (j) (first). (See Figure 15). That is,
The pressure required for re-feeding is obtained by the weight of the re-feeding roller (38). If necessary, the re-feeding roller (38) is urged downward by a spring or the like to apply re-feeding pressure. You may.

[Alignment Operation of Copy Paper, See FIG. 18 to FIG. 27] Here, the alignment operation of the copy paper (81) on the intermediate tray (58) will be described according to the copying procedure.

Alignment during double-sided copying: (a) First, select the required size of the copy papers stored in the copy paper storage units (42) and (43).

(B) Set the copy mode to the double-sided copy mode.

Here, the switching levers (41) and (59) (see FIG. 1) are switched to the positions indicated by solid lines.

The regulation plates (63), (64), (65) are moved to a solid line position shown in FIGS. 16 to 18 by a stepping motor and stand by.
This standby position is a position slightly wider than the selected copy paper size. That is, the leading edge regulation plate (64) stands by at a position slightly closer to the re-feeding direction [arrow (g)] than the contact points of the reverse conveyance rollers (56) and (57). This is the reverse transport roller (5
When the rear end of the copy paper (81) fed onto the intermediate tray (58) at 6) and (57) leaves the contact points of the reversing conveyance rollers (56) and (57), the tip regulation plate (64) is reached. This is to prevent riding up. The rear end regulation plate (65) stands by at a position separated by a length (B) from the standby position of the front end regulation plate (64). This length (B) is slightly larger than the selected copy paper size. As shown in FIG. 16, the side regulating plate (63) stands by at a position slightly wider than the reference transport position (X ₂ ) of the copy paper (81). In this way, the side regulating plate (63) is made to stand by at the retracted position from the transport reference position (X ₂ ) because the outer diameter of each transport roller in the axial direction becomes longer as the transport path of the copy paper (81) becomes longer. This is because there is a risk that the copying paper (81) may be conveyed in a skewed state due to an error in the conveying speed in the width direction due to variations in pressure contact force and the like. Further, the other side regulating plate (62) waits in a state where the solenoid (70) is turned off and the coil spring (69) presses the side regulating plate (62) in the direction of the arrow (h), and swings to the solid line position (Fig. 18). reference).

On the other hand, the re-feeding roller (38) is set to the upper position shown in FIG. 13, and is retracted upward so as not to interfere with the feeding of the copy paper (81) from the reversing transport rollers (56) and (57). ing.

(C) Next, the number of copies is set.

The steps (a), (b) and (c) may be performed randomly.

(D) Operate (turn on) the print switch.

A. The copy paper fed from the copy paper storage unit (42) or (43) is copied on one side according to the above-mentioned copying process, and is transferred by the transfer block (II) as shown by arrow (e) in FIG. Then, after the detection sensor (60) is turned on, it is inverted by the conveyance rollers (56) and (57) and fed onto the intermediate tray (58) with the copied surface facing upward.

I. The solenoid (70) is turned on immediately before the leading edge of the copy sheet (81) reaches the intermediate tray (58) by a delay timer based on the ON signal of the sensor (60), and the side regulation plate (62).
Oscillates slightly outside the reference transport position (X ₁ ) in the direction of the arrow (h '). The side regulation plate (62) is retracted to a position slightly wider than the transport reference position (X ₁ ) in order to deal with the skew feeding of the copy paper (81) as described above.

C. When the rear end of the copy paper (81) is completely conveyed onto the intermediate tray (58), the solenoid (70) is turned off, and the side regulating plate (62) moves to the coil spring (69) (see FIG. 5). Spring force first
Swing to the position shown by the solid line in Figs. 16 and 18. At this time, the copy paper (81) fed onto the intermediate tray (58) is preliminarily aligned while being in contact with the other side regulating plate (63).

D. The steps A, B, and C are repeated until the number of copy sheets (81) for which the number of copies is set is fed onto the intermediate tray (58). The part restriction plate (62) swings to preliminarily align the copy paper (81) with the other side part restriction plate (63) (see FIGS. 24 and 25).
See figure). The alignments here are preliminary to ensure the final alignments that will be made later.

E. When the copy sheets (81) for the number of copies are fed onto the intermediate tray (58), the solenoid (70) is turned on and the side regulating plate (62) swings outward as shown by the alternate long and short dash line.

F. In this state, the copy paper (81) is displaced from the conveyance reference positions (X ₁ ) and (X ₂ ) in the width direction, so that the side regulating plate (63) is moved to the reference position (X ₂ ) (No. (See Figure 26). At this time, a moving speed of about 30 mm / sec or less is suitable.

G. In this case, several sheets are conveyed reference position in the inertial force of the upper part of the copy paper (81) (X ₁₎ from the arrow (h ') shifted in the direction (see FIG. 26). In order to align it, the solenoid (70) is repeatedly turned on and off a plurality of times, and the side regulating plate (62) is swung a plurality of times to complete the alignment of the copy paper (81). . In this step, the solenoid (70) is in the ON state and moves to the next step.

Ku. The solenoid (140) (see FIG. 18) is turned on twice, the re-feeding roller (38) is positioned at the lower stage, and pressed against the copy paper (81) by its own weight (see FIGS. 15 and 22). ).

K. Next, the solenoid (70) is turned off. The side regulating plate (62) swings inward by the spring force of the coil spring (69), but comes into contact with the stopper (91) (see FIG. 10) projecting from the holder (66) and the transport reference position. It is set in the vertical direction at (X ₁ ) (see Figs. 23 and 27). This is to prevent the skew of the copy paper (81) at the time of re-feeding.

Co. At the same time, by moving the slide member (73) to the state shown in FIG. 8, the tip regulation plate (64) swings in the arrow (i ′) with the support shaft (74) as a fulcrum, and the guide plate (88) moves. Evacuate into the notch (88c). This is to prevent the leading edge regulation plate (64) from interfering with the refeeding of the copy paper (81).

Service. When the above operation is completed, it is displayed on the operation panel of the copying machine main body that double-sided copying is possible. Also,
The switching lever (41) is switched to the position indicated by the alternate long and short dash line in FIG.

(E) Operate (turn on) the print switch.

A. A main motor (not shown) is activated to rotationally drive the respective conveying rollers and the like in the copying machine body.

I. A clutch (not shown) of the shaft (86) (see FIG. 10) is turned on, and the re-feed roller (38) is rotationally driven in the arrow (j) direction.

C. Since the coefficient of friction between the re-feed roller (38) and the copy paper (81) is higher than the coefficient of friction between copy papers, the uppermost layer 1
Only the copy paper (81) is re-fed and the separation roller (3
9), (40) are handled one by one.

D. After that, the copy paper (81) is fed to the transport rollers (32), (3
3), (34) (Refer to Fig. 1) Timing roller pair (1
After being conveyed to 3), the toner image is transferred to the back side and fixed by the fixing device (9), then guided by the pair of discharge rollers (15) by the switching lever (41) and discharged onto the tray (36). .

Alignment at the time of composite copying: (a) The size of the copy paper is selected in the same manner as in (a) above.

(B) Set the copy mode to the composite copy mode.

The switching levers (41) and (59) are switched to the positions indicated by the solid lines in FIG.

The regulation plates (63) and (64) are moved by the stepping motor to the solid line positions shown in FIGS. 19 and 20, and stand by. The trailing edge regulating plate (65) stands by at a position slightly opposite to the re-feeding direction [arrow (g)] from the contact points of the conveying rollers (50) and (51). This occurs when the trailing edge of the copy paper (81) fed onto the intermediate tray (58) by the transport rollers (50) and (51) leaves the contact points of the transport rollers (50) and (51). This is to prevent the rider from riding on the end regulating plate (65).
The front end regulation plate (64) stands by at a position separated by a length (B) from the standby position of the rear end regulation plate (65). This length (B) is slightly larger than the selected copy paper size. Further, the solenoid (70) is turned off by the side regulating plate (62) and is pressed by the coil spring (69) in the direction of the arrow (h) and stands by in a state of swinging to the solid line position (see FIG. 18). ).

On the other hand, the re-feed roller (38) is set at the middle position shown in FIG. 14, and is retracted to a position where it does not hinder the conveyance of the copy paper (81) on the intermediate tray (58) described below. .

(C) Next, the number of copies is set.

Note that steps (a), (b), and (c) may be performed randomly as in the above procedure.

(D) Operate (turn on) the print switch.

A. The copy paper which has been subjected to the first copy on one side is conveyed as shown by the arrow (f) in FIG. 20, and after the detection sensor (61) is turned on, it is copied from the conveyance rollers (50) and (51). The paper is fed face down on the intermediate tray (58).

I. The solenoid (70) is turned on immediately before the leading edge of the copy sheet (81) reaches the intermediate tray (58) by the delay timer based on the ON signal of the sensor (61), and the side regulating plate (62) is indicated by the arrow ( It swings in the h ') direction slightly outside the reference transport position (X ₁ ).

C. When the rear end of the copy paper (81) is completely conveyed onto the intermediate tray (58), the solenoid (70) is turned off, and the side regulating plate (62) moves to the coil spring (69) (see FIG. 5). Spring force first
19 Swing to the solid line position in the figure. At this time, the copy paper (81) fed onto the intermediate tray (58) is preliminarily aligned while being in contact with the other side regulating plate (63).

D. The steps A, B, and C are repeated until the number of copy sheets (81) for which the number of copies is set is fed onto the intermediate tray (58). The part restriction plate (62) swings to preliminarily align the copy paper (81) with the other side part restriction plate (63) (see FIGS. 24 and 25).
See figure). The alignments here are preliminary to ensure the final alignments that will be made later.

E. When the copy sheets (81) for the number of copies are fed onto the intermediate tray (58), the stepping motor is activated and the regulation plates (64) and (65) are moved forward (arrow (g) while maintaining the interval (B)). ] To the refeed position. As a result, the copy paper (81) is conveyed to the re-feed position on the intermediate tray (58).

F. Here, the solenoid (70) is turned on, and the side regulating plate (62) is swung outward as shown by the alternate long and short dash line.

G. In this state, the copy paper (81) is displaced from the conveyance reference positions (X ₁ ) and (X ₂ ) in the width direction, so that the side regulating plate (63) is moved to the reference position (X ₂ ) (No. (See Figure 26). At this time, a moving speed of about 30 mm / sec or less is suitable.

Ku. At this time, some of the upper parts of the copy paper (81) are displaced in the direction of the arrow (h ') from the reference transport position (X ₁ ) by the inertial force as described above (see FIG. 26). In order to align it, the solenoid (70) is repeatedly turned on and off a plurality of times, the side regulating plate (62) is swung a plurality of times, and the copy paper (81) is moved.
Perfect the alignment of. In this step, the solenoid (70) is in the ON state and the process proceeds to the next step.

K. The solenoid (140) (see FIG. 10) is turned on once, the re-feed roller (38) is positioned at the lower stage, and is pressed onto the copy paper (81) by its own weight (see FIGS. 15 and 22). ).

Co. Next, the solenoid (70) is turned off. -
(D) The process is the same as that of (-), the side regulating plate (62) contacts the stopper (91) of the holder (66) and is set in the vertical direction at the transport reference position (X ₁ ) (23rd). (See Fig. 27).

Service. At the same time, the tip regulation plate (64) is retracted into the notch (88a) of the guide plate (88) as in the case of-(d)-.

Shi. When the above operation is completed, a message that composite copying is possible is displayed on the operation panel of the copying machine main body. Also,
The switching lever (41) is switched to the position indicated by the alternate long and short dash line in FIG.

(E) Turn on the print switch.

Each of the steps (-e) a, a, c, and d is executed, and composite copying is performed by superimposing it on the copied surface.

In the above alignment method, each time the copy paper (81) is fed onto the intermediate tray (58) one by one, it is moved to a position displaced in the width direction from the transport reference positions (X ₁ ) and (X ₂ ). Then, preliminary alignment is performed, and after a predetermined number of copy papers (81) have been fed, the copy papers (81) are moved to the transport reference positions (X ₁ ) and (X ₂ ) to perform realignment. Therefore, the alignment becomes reliable and accurate, and refeed failure does not occur.

If a friction member such as rubber is provided on the bottom of the side regulating plate (63), the copy paper (81) fed onto the intermediate tray (58) can be prevented from being displaced and a more reliable alignment can be achieved. It can be carried out.

[Electrification removal mechanism for copy paper, Fig. 10, Fig. 28 to Fig. 30] By the way, the copy paper (81) fed into the intermediate tray unit (A) has a discharge phenomenon caused by the separation charger (5b) and an alignment phenomenon. When the toner image is fixed by the fixing device (9) in the previous step, the toner image is heated to remove water and easily charged. In particular, during double-sided copying, since the transport distance is long [passes through the transport block (II)], it is actually charged. The charged copying papers (81) are mutually attracted by each other, and when re-fed, many sheets are re-fed at one time or skewed.

Therefore, it is necessary to install a charge eliminating mechanism in the intermediate tray unit (A) to eliminate charge from the copy paper (81). The static elimination is preferably performed immediately before the copy paper (81) is sent onto the intermediate tray (58). Before that, for example, when it is carried to the unit (A), the carrying rollers (52), (53), (5
This is because they are charged when passing through 4) and (55). In addition, even when the paper is re-fed, it is necessary to remove the charge because it is charged by the friction between the copy sheets (81) when the paper is re-fed.

Specifically, as shown in FIG. 10, a guide plate (133) having a static eliminating brush (135) at its tip is rotatably attached to a spindle (86) and wound around the spindle (86). Torsion spring (13
It is always urged upward in 4) and positioned by the stopper (136) attached to the frame (114) of the unit (A). In addition, above the guide plate (133), the holder (6
A pressing member (132) protruding from the support member 6 extends and is pressed by the pressing member (132) as the re-feeding roller (38) and the holder (66) swing downward, and the spindle (86). ) As a fulcrum and swings downward.

FIG. 28 shows the case where the re-feed roller (38) is set in the upper stage, that is, when the copy paper (81) is fed to the intermediate tray (58) during double-sided copying. At this time, the guide plate (13
The position of 3) is regulated by the stopper (136) and is set on the upper stage similar to the re-feeding roller (38). Then, the copy paper (81) is sent from the transfer rollers (56) and (57) onto the intermediate tray (58) while being in contact with the charge removal brush (135), and the charge is removed (see FIG. 13).

FIG. 29 shows the case where the re-feeding roller (38) is set in the middle stage, that is, when the copy paper (81) is fed onto the intermediate tray (58) during composite copying. At this time, the guide plate (133) is pressed by the pressing member (132) provided on the holder (66) and set in the same middle stage as the re-feeding roller (38) (see FIG. 14). At this time, the guide plate (133) functions as a guide for the copy paper (81) like the holder (66) and the re-feed roller (38) as described later.

FIG. 30 shows the case where the re-feed roller (38) is set in the lower stage, that is, when the copy sheet (81) is re-fed. At this time,
The guide plate (133) is pressed by the pressing member (132) and set in the lower stage like the re-feeding roller (38). Then, the copy paper (81) is re-fed without being in contact with the charge removal brush (135), and the charge is removed (see FIG. 15).

[Copy Paper Guide Mechanism, See FIGS. 31 to 36] The copy paper (81) which has been once fixed by the fixing device (9) is likely to be curled due to the thermal influence at the time of fixing. .

Then, the curled copy paper (8
When a large number of 1) are fed in, the height (C) of the copy paper (81) becomes higher than the height (E) of the regulation plates (64) and (65) as shown in FIG. When the next copy paper (81) is fed, the copy paper (81) rides on the regulation plate (65) as shown in FIG. It is possible to regulate by setting the regulation plate (65) high, but this is not preferable because the height of the intermediate tray unit (A) becomes high.

Therefore, as shown in FIGS. 33 and 34, the guide member (9
2) Above the intermediate tray (58), the regulation plates (64), (65)
It was installed in the direction intersecting with. In this case, the guide member (9
The height (B) of 2) is the height (E) of the regulation plates (64) and (65).
Lower than the guide member (92) and the regulation plates (64), (65)
The distance (D) between and is set to be relatively narrow. This reliably prevents the copy paper (81) from riding on the regulation plates (64) and (65). Moreover, when the distance (D) is made narrower by increasing it, as shown in FIG.
This is because the copy paper (81) may run on the regulation plates (64) and (65) due to the deformation indicated by the two-dot chain line in 1).

Fig. 33 shows the restriction plates (64), (6
Although the position of 5) is shown in the figure, the restriction plates (64) and (65) are moved in the direction of the arrow (g ') from the position of FIG. Crosses the guide member (92), and the leading end of the fed copy paper (81) is prevented from riding on the regulation plate (64).

On the other hand, when feeding a long size copy paper (81) onto the intermediate tray (58) during composite copying (see FIG. 14), the front end regulation plate (64) is positioned in front of the guide member (92). Therefore, the leading end portion of the upper curled copy paper (81) cannot be guided by the guide member (92). Therefore, as described above, the re-feeding roller (38), the holder (66) and the guide plate (133) are set in the middle stage to guide the leading end portion of the copy paper (81) and do not ride on the leading end regulating plate (64). Are regulated as follows.

If the guide member (92) extends to the installation position of the sheet re-feeding roller (38), the guide by the holder (66) or the like becomes unnecessary. However, if the guide member (92) is made too long in the re-feeding direction, the conveyance rollers (56) and (57) will be used during double-sided copying.
There is a problem that the copy paper (81) fed from the sheet comes into contact with the guide member (92). The guide member (92) is attached to the frames (106) and (107) of the transfer block (II), and is pulled upward when the transfer block (II) is opened, and at this time, the frame (113) of the unit (A). ), (1
It is necessary not to interfere with the conveying roller (54) provided in 14), so that the re-feeding direction [arrow (g)] from the position shown in FIG.
Cannot be extended to.

Furthermore, for copy paper (81) that has been curled upward in the direction orthogonal to the transport direction, bend the upper parts of the side regulating plates (62) and (63) inward as shown in FIG. The curled copy paper (81) is handled by the side regulation plate (62),
We are careful not to get over (63).

When re-feeding the paper, the guide plate (133)
It has a function to prevent the side part of 1) from floating upward. That is, in this embodiment, since the re-feed roller (38) presses only the central portion of the copy paper (81), both sides of the copy paper (81) that is curled upward in the width direction are lifted. Therefore, if the paper is re-fed in this state, it may cause skew or paper jam. Therefore, at the time of re-feeding, not only the re-feeding roller (38) and the holder (66) but also the guide plate (133) are positioned in the lower stage, and the holder (66) and the guide plate (133) are used to make a copy paper (81 ) Is guided from above on both sides (see Fig. 30).

[Alignment Correction Mechanism During Synthetic Copy, See FIG. 37 to FIG. 40] During synthetic copy, the copy paper (81) is guided by the guide plate (97) as shown in FIG. Five
It is fed onto the intermediate tray (58) at 0) and (51).
At this time, if a large number of curled copy papers (81) are fed, the trailing edge is lifted above the contact points of the transport rollers (50), (51), and the next fed copy paper (81) is jammed. Will occur.

Therefore, in this embodiment, the conveyance roller (50) is connected to the support shaft (50
Install at a predetermined interval at multiple points in a), and
A plurality of sheets (3 in this embodiment) at arbitrary points on the support shaft (50a).
Elastic blades (96) were attached. This elastic blade (96)
Is attached to a position outside the trailing edge regulating plate (65) so as to be able to contact both sides of the copy paper (81) being conveyed, and the conveying roller (50) is rotated at equal intervals in the circumferential direction. It is inclined in the direction of supplementing the direction [arrow (m)]. The length (L) of the elastic blade (96) is the radius (R) of the transport roller (50).
The length is longer than that of the rear end regulating plate (65) and overlaps with the rear end regulating plate (65) by a length (G) (see FIG. 38).

Therefore, the elastic blade (96) rotates in the direction of the arrow (m) together with the conveying roller (50), and presses the rear end of the copy paper (81) which is about to be lifted by the upper curl, as shown in FIG. Prevents the conveying path from being blocked.

[Reverse conveying rollers (56), (57) and reverse guide plate (93)
Relationship, see FIG. 9] When copying on both sides, copy paper (81) to intermediate tray (58)
Reversing conveyance roller (56) that reverses just before sending it up,
(57) and the reversal guide plate (93) must be constructed so as to be able to reliably reverse a stiff copy paper such as thick paper and a stiff copy paper such as thin paper or a curled copy paper. Then, the diameters (D ₁ ) and (D ₂ ) of the reverse conveying rollers (56) and (57), the radius (R) of the reverse guide plate (93), the conveying rollers (54) and (55), and the reverse conveying roller ( 56),
As a result of conducting experiments by setting various distances (L) between contacts of (57), the following points of caution were found.

(A) When the distance (L) between the rollers is short, in order to turn over the strong copy paper, the roller diameter (D) and the guide radius (R) are required.
Must grow.

(B) In addition, when the distance (L) between the rollers is short, the number of places where the transport rollers are set up to the transport rollers (54) and (55) is increased, resulting in an increase in cost. Therefore, it is preferable that the distance (L) between the rollers is long in terms of cost. However, a minimum size copy paper length is required.

(C) Larger guide radius (R) and roller diameter (D ₁ ) are preferable for reversing copy paper. However, if it becomes too large, the unit (A) becomes large.

(D) In a configuration such as this unit (A) that reverses the copy paper immediately before sending it to the intermediate tray (58), the reverse conveyance rollers (56) and (57) include the re-feed roller (38) and the separation roller ( It is inevitable that it is installed between 39) and (40), and the reverse conveyance rollers (56) and (57) do not interfere with the copy paper at the time of re-feeding, and the unit (A) is compact. Must be arranged so that the For that purpose, the diameters (D ₁ ) of the reverse conveyance rollers (56) and (57),
(D _2), in particular the diameter of the lower transport rollers (57) (D ₂₎ as much as possible towards the small diameter is preferred.

In view of the above considerations, the copy paper smooth inversion, considering miniaturization of the unit (A), the roller diameter (D ₂₎ ≦ roller diameter (D ₁₎ roller radius (D _1/2) ≦ guide radius It is preferable to set so as to satisfy the condition (R), and the present embodiment is configured in this way.

EFFECTS OF THE INVENTION As described in detail above, according to the present invention, the intermediate tray and the copy sheet after copying are installed right above the intermediate tray from one end to the other end of the intermediate tray for feeding the copy paper onto the intermediate tray. The first transporting means, the second transporting means for feeding the copied copy paper from the other end of the intermediate tray into the intermediate tray without reversing the copy paper, and the re-feeding of the copy paper sent on the intermediate tray. And a supporting means for supporting the intermediate tray, the first transporting means, the second transporting means and the re-feeding means as an integral unit so as to be pulled out from the copying machine main body to the front side, The first conveying means is rotatable with respect to the intermediate tray so that the first conveying means can be opened above the intermediate tray with the copy paper entrance side of the first conveying means as a fulcrum in a state where the first conveying means is pulled out from the copying machine main body. And a coupling means that is rotatably provided on the first conveying means and that is provided on the copying machine main body when the unit is located inside the copying machine main body and a front side and a back side of the unit. Since the structure is provided with the lock lever that engages with each other and locks the unit and the copying machine main body and the intermediate tray and the first conveying means at the same time, the space inside the copying machine is smaller than that of the conventional switchback system. The sheets can be efficiently put together, the transport time of the copy sheets can be shortened, and even if a paper jam occurs in the reversing unit or the like, the paper jam processing can be easily performed by pulling out the unit. Further, since the first conveying means is provided right above the intermediate tray and the intermediate tray can be pulled out to the front side of the copying machine main body, the copying machine itself can be made compact.

Moreover, since the first conveying means can be opened above the intermediate tray with the entrance side of the copy paper as a fulcrum, that is, the space on the entrance side of the copy paper can be accurately positioned, so that the paper jam at this portion occurs. When the unit itself is pulled out, the first conveying means is also pulled out at the same time, and the operability is good.

Further, since the unit is engaged and fixed on the front side and the back side of the copying machine main body by the lock lever, there is no rattling in the copying machine main body.

Further, the lock of the unit to the main body of the copying machine and the lock of the unit to the unit of the first conveying means can be used together, and the structure is further simplified and the operability is excellent. .

[Brief description of drawings]

The drawings show an embodiment of a copying machine according to the present invention. FIG. 1 is an overall configuration diagram, FIG. 2 is a perspective view of a unit in a pulled-out state, and FIG. 3 is an internal configuration diagram of the unit. FIG. 4 is a perspective view of the lock mechanism, FIG. 5 is an exploded perspective view of the aligning mechanism and the sheet re-feeding mechanism, and FIG. 6 is a perspective view of the restriction plate attachment portion. 7 and 8 are operation explanatory views of the tip regulating plate. FIG. 9 is a front view for explaining the relationship between the re-feeding unit and the conveyance rollers of the reversing block. FIG. 10 is a perspective view of the re-feed roller swing mechanism, and FIG. 11 is an operation explanatory view of the re-feed roller swing mechanism.
FIG. 12 is a sectional view of the clutch means, FIG. 13, FIG. 14, and FIG.
The figure is a diagram for explaining the operation of the re-feed roller and the like. 16 to
FIG. 23 is for explaining the operation of the alignment mechanism. FIG. 16 is a plan view at the time of reverse copying, FIG. 17 is a front view of FIG. 16, and FIG.
Figure is a side view of Figure 16, Figure 19 is a plan view of composite copying,
Figure 20 is a front view of Figure 19, Figure 21 is a plan view of refeeding,
22 is a front view of FIG. 21, and FIG. 23 is a side view of FIG. 24, 25, 26, and 27 are all explanatory views of the copy sheet aligning operation. 28, 29, and 30 are operation explanatory views of the re-feeding roller and the static elimination brush. 31 to 36 are for explaining the copy paper guide mechanism,
Figures 31, 32 and 33 are front views, 34, 35 and
Figure 36 is a side view. Figures 37 to 40 show the copy paper feeding portion during composite copying. Figure 37 is a side view and
FIG. 38 is a sectional view, and FIGS. 39 and 40 are operation explanatory views. (A) ... intermediate tray unit, (I) ... switching block, (II) ... transport block, (III) ... reversing block, (IV) ... alignment, intermediate tray block, (V) ...
… Refeeding block, (38) …… Refeeding roller, (44),
(45) …… rail, (58) …… intermediate tray, (81) ……
Copy paper, (100) …… Operation lever, (101) …… Axis, (10
2), (103) …… Lock lever, (102a), (103a)…
… Protrusion, (104), (105) …… Torsion spring, (106),
(107) ... frame, (113), (114) ... frame, (116), (117) ... protrusion, (116a), (117a) ...
… Lock holes,

Claims (1)

[Claims] 1. An intermediate tray, a first conveying means installed immediately above the intermediate tray from one end to the other end of the intermediate tray for reversing and feeding the copied copy paper onto the intermediate tray. Second transporting means for feeding the copy paper from the other end of the intermediate tray into the intermediate tray without reversing the copy paper, and refeeding means for re-feeding the copy paper sent on the intermediate tray, Supporting means for supporting the intermediate tray, the first transporting means, the second transporting means and the re-feeding means as an integral unit so as to be able to be pulled out from the copying machine main body to the front side, and in a state where the unit is pulled out from the copying machine main body. Connecting means for rotatably connecting the first conveying means to the intermediate tray so that the first conveying means can be opened above the intermediate tray with the copy paper entrance side of the first conveying means as a fulcrum; When the unit is located in the main body of the copying machine, the engaging portion provided in the main body of the copying machine is rotatably provided on the conveying means, and the front side and the back side of the unit are engaged with each other. And a lock lever that locks the intermediate tray and the first transporting unit at the same time.