JPS628963A - Copy machine - Google Patents

Abstract

PURPOSE:To simplify the paper re-feeding structure by providing a leading edge limiting board for positioning the leading edge in re-feeding direction of copied paper fed into an intermediate tray in double side copying retractably from the re-feed path when re-feeding the paper. CONSTITUTION:Copied paper is carried through carrying rollers 50, 51 into the intermediate tray 58 and fed again through rotation of re-feed roller 38. the intermediate tray 58 is provided with four limiting boards 62-65 for matching the copy papers. Here, a leading edge limiting board 64 for positioning the leading edge of copy paper in re-feeding direction is fixed rollably around the shaft 74 against a slide member 73 movable on a slide rail 77. When feeding the paper again, the lower end of said board 64 will contact against a stopper 78 through motion of sliding member 73 in the direction (d) to roll said board 64 forward against the energizing force and retract below the guide board 88 thus to enable re-feeding of paper.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a copying machine, and more particularly, to a copying machine, copy sheets are sequentially stacked on an intermediate tray installed in the main body of the copying machine, and then the paper is re-fed. Regarding copying machines.

Traditional beads! In recent years, copying machines with various functions have been developed, including double-sided copying, which copies on both the front and back sides of copy paper, and copying different images (for example, a frame and text inside the frame) or different colors on one side of copy paper. Synthetic copying is known, in which copies are made using toner. In order to perform this type of function, it is necessary to once feed the copy paper after copying into an intermediate tray and then re-feed the copy paper. In this case, it is necessary to accurately align the copy paper fed onto the intermediate tray to the paper refeeding position and to open a refeed path for the copy paper.

Therefore, conventionally, when refeeding paper, the leading edge of the intermediate tray is lifted higher than the leading edge regulating means of the copy paper.

However, since the intermediate tray is a relatively large member, not only a large mechanism is required to swing it, but also a large swing space is required, and the copying machine itself However, there is a problem in that it leads to an increase in size.

In order to solve the above problems, the copying machine according to the present invention has the following features:
The leading end regulating plate for positioning the leading end in the re-feeding direction of the copy paper fed onto the intermediate tray is retracted from the re-feeding path of the copy paper during re-feeding.

Hereinafter, one embodiment of a copying machine according to the present invention will be described with reference to the accompanying drawings.

[Total nine-unit configuration of copying machine, see FIG. 1] First, the overall configuration of this copying machine will be explained together with the copying operation.

This copying machine has a copy paper storage section and a paper feed section in the lower part, an intermediate tray unit (A) directly above the copy paper storage part, and an image forming part centered on the photoreceptor drum (2) in the middle part. , an optical system (1) is installed in the upper part, and by sending the copy paper after copying to the intermediate tray unit (A') and refeeding it,
Double-sided copying and composite copying are possible.

The photosensitive drum (2) is rotatable in the direction of arrow (a), and around it are a charging charger (6), a magnetic brush type developing device (3), a transfer charger (5a), and a separation charger (5b). , blade-type cleaning device (4)
, eraser lamps (7) are arranged in sequence. As the photosensitive drum (2) rotates in the direction of the arrow (a), it is uniformly charged by the charger (6), receives image exposure (L) from the optical system (1), and forms an electrostatic latent image. This electrostatic latent image is developed into a toner image by a developing device (3).

The optical system (1) is located below the document platen glass (16) with an arrow (1).
1), and is composed of a light source (10), movable mirrors (lla), (llb), (llc), an imaging lens (12), and a fixed mirror (lld). The light source (lO) and movable mirror (Ha) are (V/m) (where m: copy magnification ) moves integrally in the direction of arrow (b), moving the movable mirror (ll
b), (Ilc) move integrally in the direction of arrow (b) at a speed of (V/2m).

On the other hand, the copy paper storage section consists of an elevator-type storage section (42) on the -L stage and a cassette-type storage section (43) on the lower stage, both of which have rails (46), (47) and rails (48). , (49) allows it to be pulled out from the main body of the copying machine to the front side. Copy paper in the storage section (42) is fed by the rotation of the paper feed roller (18), and copy paper in the storage section (43) is fed by the rotation of the paper feed roller (19). From this, either one of them can be selectively used as a sorting roller (2G), -
(21), ・(22).

(23), the sheets are separated and fed one by one, and the conveyor rollers (
29), (30), (31), (24), (25
), (26), (32), ・(34) and (2
7) and (28), it is transported to the timing table-ra pair CI'3). After the copy paper is temporarily stopped by a pair of timing rollers (13), it is sent to the transfer section in synchronization with the image formed on the photoreceptor drum (2), and the copy paper is transferred to the transfer section by the discharge of the transfer charger (5a). The toner image is transferred and separated from the surface of the photoreceptor drum (2) by discharge of a separation channeler (5b), and transferred to a fixing device (9) by a conveyor belt (8) equipped with an air suction means (8a).
, where the toner image is melted and fixed. □ A transport row provided immediately after the exit of this fixing device (9).

A lever (41) is installed between the pair of rollers (14) and the pair of discharge rollers (15) for switching the conveyance path of the copy paper. If the copy paper is to be ejected as is, the lever (41) is set to the state shown by the dashed line in FIG.
15) to a tray (36). Also, when performing double-sided copying or composite copying (described in detail below)
In this case, the lever (41) is set to the state shown by the solid line, and the copy paper is moved from the pair of transport rollers (35) to the guide plate (37).
and into the intermediate tray unit (A) which will be described in detail below.

On the other hand, residual toner is removed from the photoreceptor drum (2) after transfer by a cleaning device (4), and an eraser lamp (7) removes residual toner from the photoreceptor drum (2).
) The residual charge is removed by light irradiation, and the paper is prepared for the next copying.

[Intermediate tray unit, see FIGS. 1 to 3] Next, the schematic structure of the intermediate tray unit (A) will be described.

The intermediate tray unit (A) includes a switching block (,1), a transport block (11), a reversing block (Ill), an alignment block (m), and a paper refeeding block (
V) and an integrated unit as a whole.
It is supported by rails (44) and (45) at both ends, and is pulled out from the copying machine body toward the front, that is, in a direction perpendicular to the copy paper transport path, as shown in Figure 2. It is considered possible. The reason why this unit (A) can be pulled out from the main body of the copying machine is to facilitate various types of maintenance, facilitate paper jam removal, and the like.

By the way, the switching block (1) is the conveyor roller (50).
, (51), and a switching lever (59). Note that this block (I) is an intermediate tray unit (
It may be provided on the copying machine main body side without providing it in A).

The transport block (I l) has transport rollers (52) and (53).
), (55), guide plate (201), (202), <
203) and (204), and the unit (A
) can be opened upward using the support shaft (95) as a fulcrum when it is pulled out forward. This block (
1) can be opened upwards in order to facilitate the handling of paper jams within the unit (A).

The reversing block (II+) has reversing conveyance rollers (56), (
57) and a reversing guide plate (93), which has the function of reversing the copy paper conveyed within the conveying block (l l) and feeding it onto the intermediate tray (58).

Alignment, intermediate tray block (1■)
8), slide rail (77), slide member (73)
.

(79), regulation plate (62), (63), (64), (6
5) (see Figure 5), with an intermediate tray (58
) has the function of aligning the copy paper fed onto the top.

The paper refeeding block (V) includes a holder (66), a paper refeeding port (38), sorting rollers (39), (40), and a guide plate (
88) for refeeding copy sheets aligned to the intermediate tray (58)-L one by one.

For reverse copying and composite copying, when one of the copy modes is selected by pressing the selection key on the operation panel (not shown) in advance, the switching lever (41) moves to the solid line in FIG. The copy paper, which has been switched to the position and has been copied on one side, is guided by a guide plate (37) from a pair of transport rollers (35) and transported to transport rollers (50) and (51).

The other switching lever (59) is rotatable around the shaft (85), and during reverse copying, it is set to the state shown by the solid line in Figure 3, and the copy paper is moved to the lever (59).
It is guided by the upper surface of the conveyor block (1) and
The transport rollers (!12), (53), (54) are guided by the guide plates (201), (203), (204).
, (55) to the left in FIG. 3, and is reversed by the reversing transport rollers (56), (57) and the reversing guide plate (93), and placed on the intermediate tray (58) J with the copied side facing up. Sent to the second. Then, the sheets are aligned on the intermediate tray (58) by the aligning mechanism described in detail below, and then
) is re-fed one by one by clockwise rotation.

On the other hand, during composite copying, the switching levers (5,
9) is set in the state shown by the dashed-dotted line in FIG.
) and is sent with the copied side facing down. Then, the sheets are aligned on the intermediate tray (58) by the aligning mechanism described in detail below, and the paper re-feeding roller (38) is aligned as in the case of reverse copying.
) is re-fed one by one by clockwise rotation.

The re-fed copy paper is separated by rollers (39) and (40).
While being handled by the conveyance rollers (32), (33),
(34) and is conveyed to the timing roller pair (13), whereupon double-sided copying or composite copying is performed in the same manner as in the normal copying process. Note that the paper refeed roller (38) is positioned and swingable in three stages using the support shaft (86) of the holder (66) as a fulcrum (dotted chain line and double dotted line in FIG. 1).

Solid line Sanho) 1. When the copy paper is fed onto the intermediate tray (58), it is placed in the upper or middle stage, as described in detail below, and when it is re-fed, it is aligned on the intermediate tray (58).
It is designed so that it can be pressed with the appropriate pressure onto the copy paper that has been prepared. , [Unit lock mechanism, see FIG. 4 1 Next, the unit lock mechanism will be explained.

The locking mechanism locks the unit (A) inside the copying machine body, locks the transport block (II) to the unit (A), and locks the upper transport roller (55) to the lower transport roller (54). ) to maintain the pressure contact state.

The shaft (101) is connected to the frame 1 of the conveyor block (11). (+
06).

(+07) so as to be rotatable in a penetrating state, and an operating lever (100) is fixed to the front end. Also,
Lock levers (+02) and (103) are fixed to the outside of the frames (+06) and (+07) of the shaft (+01), and a torsion spring (+04) is wound around the shaft (+01).
One end of (+05) is this lock lever (+02), (
103), and the other end is engaged with the frame (106), (1
07), the shaft (toe) moves along with the levers (+00), (+02), and (+03) along with the arrows (
C) is biased in the direction. At this time, lock lever (
102), (103) protrusion (102a), (10
3a) is the protruding piece (116) of the body frame of the copying machine, (
+17) lock hole (lI6a).

(II7a) from below, locking the unit (A) to the copying machine body and simultaneously
I) is prevented from opening upward. In order to integrate the transport block (II) with the unit (A) in the pull-out direction, the bent end portions of the frame (+06) and (+07) are connected to the frame 1-(+13) of the unit (A).
, (+14) is brought into contact with the inside of the frame (+13), and at the other end of the engagement here, the support shaft (95X, see Figure 3) is connected to the frame (+13),
(114).

Therefore, the operating lever (100) is flipped from the state shown in FIG. 4 in the direction opposite to the arrow (c) (104);
By rotating the lock levers (+02) and (+03) against the spring force of (105), the protrusions (+16)
, (+17) lock hole (l]6a), (II7a
), and the unit (A) can now be pulled out from the copying machine main body to the front side. At the same time, the transport block (II) is also unlocked, and the transport block (l) can be opened upward using the support shaft (95) as a fulcrum. In addition, the transport block (11
) is opened to one side, a stopper member (not shown) provided on the unit (A) side prevents the unit (A) from swinging beyond the position indicated by the dashed dotted line in FIG. , this locking mechanism is connected to the unit (Δ
) and the transport block (11) can be locked.

By the way, the lower transport roller (54) is the unit (A).
Bearing (II+) on frame (+13), (+14)
, (+12), and can be rotated in the direction of arrow (d) by a drive means (not shown). The upper transport roller (55) has bearings (+08) at both ends, (10
9) is the frame (+06) of the transport prowler (11),
Guide hole (106a) formed perpendicularly to (107)
, (+07a) can move up and down and rotate freely by being loosely fitted into the frame (+06).

A coil spring (110) installed on the outside of (107),
(+15) is urged downward by engaging with the bearings (108) and (109) from above. Therefore, the conveyance roller (55) is connected to the coil spring (110) when the conveyance block (1) is locked to the unit (AI).

The spring force of (115) presses against the lower conveyance roller (54) with a certain appropriate pressure, and the conveyor roller (54) is driven to rotate based on the rotation of the conveyance roller (54). When the lock is released and the transport block (I+) is opened, the coil spring (110).

Bearing (10g) with spring force of (115), (109)
comes into contact with the lower edges of the guide holes (106a) and (107a), and the pressure contact with the conveyance roller (54) is released.

In this way, the lower transport roller (54) is connected to the unit (A
) is provided on the main body side so that a driving force transmission mechanism (not shown) to the conveying roller (54) is driven by a mechanism common to other driving members of the unit (A). If the conveyance roller (54) is provided on the conveyance block (II) side, it is necessary to set its drive mechanism to be separable from the drive mechanism provided in the unit (A). This is because the configuration becomes complicated. In addition, along with this, a means for pressing the conveyance roller (55) against the conveyance roller (54) with appropriate pressure is required, and therefore, coil springs (110), (+15), conveyance block ( A locking mechanism stage is installed to position and fix 1) in a predetermined position.

[Copy paper alignment mechanism, see FIGS. 5 to 8] Next, a description will be given of the alignment mechanism for copy paper (81) fed into the intermediate tray (58)l.

In FIG. 5, arrow (e) indicates that the copy paper is in the intermediate tray (5).
8) Direction sent to l: when copying in reverse, arrow (f)
Similarly, indicates the direction in which the composite copy is sent, and the arrow (
g) indicates the paper refeed direction.

There are four regulation plates that align the copy paper (81).
The side regulation plate (62) can swing around the support shaft (68), and the other side regulation plate (63), the tip regulation plate (64), and the rear regulation plate (65) are connected to the slide rail. (
Slide members (71), (73) on top of 72), (77)
, (79), each slide member (71)
, (73), and (79) are driven by a stepping motor (not shown), arrows (g) and (g'
), (h), and (h') directions. This amount of movement is set to a predetermined value by controlling the rotation angle of the stepping motor.

As shown in FIG. 6, the tip regulating plate (64) is attached to the slide member (73) so as to be able to swing about a support shaft (74), and has a torsion wound around the support shaft (74). It is biased in the direction of arrow (i) by a spring (75), and is normally regulated to be perpendicular to the intermediate tray (58) by the protruding lower edge (73aX, see Figure 7) of the slide member (73). ing. This leading edge regulating plate (64) aligns the leading edge of the copy paper (81) fed into the intermediate tray (58)l at the position shown in FIG. When refeeding paper, the slide member (
73) moves in the direction of arrow (g), and as shown in FIG. 8, the lower end of the tip regulating plate (64) comes into contact with the stopper (78), so that the torsion spring (
It swings in the direction of the arrow (io) against the spring force of 76) and retreats into the notch (88a), (g8a) of the guide plate (88), making it possible to refeed the copy paper (81). shall be.

The leading edge regulating plate (64) is placed at each position: the paper refeeding position shown in Figure 8, the leading edge alignment position shown in Figure 7, and the temporary alignment position for composite copying (which differs depending on the copy paper size) as detailed below. It is movable, and its position is controlled based on the projection (73a) of the slide member (73) being detected by the transmission photosensor (83) in the state shown in FIG. Similarly, the position of the rear end regulating plate (65) is also controlled based on the fact that the protrusion (79a) of the slide member (79) is detected by the transmission photosensor (84), as shown in FIG. It will be done. Similarly, the position of the side regulating plate (63) is controlled by the sliding member (
71) based on detecting the fixed position.

Further, as shown in FIG. 5, the side regulating plate (62) is connected to the solenoid (70) and is pressed in the direction of arrow (h) by a coil spring (69). 70) is turned off and is regulated by a stopper (not shown) to the dotted line position, and when refeeding paper, the refeed roller (38)
It comes into contact with a stopper (91) protruding from the holder (66) and is set at the solid line position. Also, solenoid (70)
When turned on, it swings about the support shaft (68) to the dashed-dotted line position against the spring force of the coil spring (69).

[Paper re-feed roller swinging mechanism, see FIGS. 10 to 15] Next, the structure and operation of the swing mechanism for the paper re-feed roller (38) will be described.

As shown in FIG. 10, the paper refeed roller (38) is supported by a cantilever on a support shaft (87) rotatably attached to a holder (66), and the holder (66) is attached to the frame (A) of the unit (A).
+13) and (114) (see Fig. 4), and is fixed at the rear end to the support shaft (86). Support shaft (8
6) is rotationally driven in the direction of arrow (j) by a drive means (not shown), and this rotation is caused by a timing belt (128) stretched around pulleys (12B) and (127) fixed to support shafts (86) and (87). ) to the refeed roller (38). That is, the support shaft (86) is connected to the driving means of each transport roller of the unit (A) by a clutch (not shown), and this clutch is turned on only at the paper refeed timing, so that the paper refeed roller (38) is activated. Arrow (rotating part □ in direction D)
be moved.

A swing lever (145) is swingably attached to one end of the support shaft (86), and a shaft (145a) protruding from one end faces the protrusion (66a) of the holder (66) from below, The long hole (145b) formed at the other end is connected to the conveyance roller (54).
A clutch plate (1) rotatably attached to a support shaft (54a) of
24), a protruding pin (125) is loosely fitted. As shown in FIG. 12, another clutch plate (121) is fixed to the end of the support shaft (54a), and is a clutch plate (12+).

A kick spring (122) is attached to each boss part of (124).
is wound around the outer periphery of the claw portion (129), (
130).

A collar (123) with (1,31) is attached. One end (122a) of the kick spring (122) engages with the collar (123), and the other end (122b) engages with the clutch plate (124). That is, when the kick spring 022) is in a free state, the clutch plate (121),
Tighten the boss part (124) to transmit the rotation of the support shaft (54a) in the direction of arrow (d) from the clutch plate (121) to the clutch plate (124) and the collar (123). on the other hand,
The collar (123) is the lever (142) described below.
When the rotation is prevented at , the rotation in the direction of arrow (d) transmitted from the support shaft (54a) to the clutch plate (+21) acts in the direction of rewinding the kick spring (+22),
The clutch plate (+21) slips and rotates with respect to the kick spring (122), and no rotational force is transmitted to the clutch plate (+24).

As shown in Fig. 10, the means for operating the clutch means described above is mounted on a solenoid (+41) attached to the plate (+41).
140) and a lever (+42).

The lever (+42) is swingably attached to the support shaft (144), is always biased in the direction of arrow (k) by the spring force of the torsion spring (+43) wound at the bottom, and is stopped by a stopper (not shown). It is regulated at the position shown by the solid line in Figure 10. In addition, the lever (142) is the solenoid (+40) plant gear (14).
0a), and when turned on, the plunger (140a
) moves back, causing it to swing to the position indicated by the dashed-dotted line. The tip of the lever (+42) is connected to the claw part (1) of the collar (+23).
29), (130), (131), and as shown in FIG. 12, when the lever (142) is set to the solid line position, the claws (+29), (13]
) can come into contact with it, and when it is set at the dashed-dotted line position, the claw part (13(1)) can come into contact with it.

Here, the operations of the clutch means, the swing lever (+45), and the associated positions of the paper refeed roller (38) will be explained by dividing them into the first stage, middle stage, and bottom stage.

■The solenoid (140) is turned off at the stage position (-, dotted chain line position in Fig. 11), and the claw portion (12) of the collar (123) is turned off.
9) It is in contact with the culver (142) from the direction of arrow (1).At this time, the collar (+23) is in a state of being prevented from rotating, and it is in contact with the culver (142) from the direction of arrow (1).
) direction, the rotation is caused by the clutch plate (1
24), and the swing lever (145)
is the pin (125) shown by the dashed line in Figure 11 (B)
is held in position. Then, the holder (66) is lifted by the shaft (145a) of the swinging lever (+45) and swings in one direction -1 using the support shaft (86) as a fulcrum, and the paper refeed roller (38) is moved as shown in FIG. It is located on the second level indicated by the dashed line in the middle. When the copy paper (81) is fed from the reversing block (Ill) onto the intermediate tray (58) during double-sided copying, the paper refeed roller (38) is set on this upper stage (see FIG. 13).

=19- ■Middle stage position (dotted line position in Figure 11) When the solenoid (140) is turned on while the conveyance roller (54) is rotationally driven in the direction of arrow (d), the claw portion (+29) is released from contact with the lever (+42). At this time, the kick spring (122) tightens the boss parts of the clutch plates (121) and (+24), the clutch plate (+24) and the collar (123) co-rotate in the direction of arrow (d), and the other claw parts ( +30) is the lever (142)
By coming into contact with this, the collar (123) is prevented from rotating, and the clutch plate (124) is also prevented from rotating.

That is, the collar (123) and the clutch plate (124) rotate in the direction of arrow (d) by an angle corresponding to the protruding distance from the claw part (129) to the claw part (130), and the swing lever (145) rotates in the direction of the arrow (d). The holder (66) also swings downward in conjunction with the shaft (145a) and is held in the position (C) shown by the dotted line in FIG. However, the paper refeed roller (38) is located at the middle stage shown by the dotted line in FIG. When the paper is fed, the refeed roller (38) is set in the middle stage (No. 14-20 = see the figure).In this way, the paper refeed roller (38) and holder (66) are set in the middle stage. is the middle tray (58
) to prevent the leading edge of the copy paper (81) from curling upward and popping out when the copy paper (81) is conveyed to the paper re-feeding position. )
This is to prevent this.

■Lower position (solid line position in Figure 11) When the solenoid (140) is turned off in the state of ■,
The claw portion (130) is released from contact with the lever (+42). At this time, the kick spring (122) is tightened by the force that causes the lever (14) to tighten the other claw (+31).
2) until it touches the clutch plate (124) and collar (1).
2a) co-rotates in the direction of arrow (d), and the swing lever (14
5) is swung together with the pin (125) in the direction opposite to the arrow (D) and is held at the position (D) shown by the solid line in FIG. 1.1.

At this time, the shaft (145a) of the swing lever (145) moves below the protrusion (66a) of the holder (66), and the paper refeed roller (38) is pressed against the tray (58) by its own weight. . The paper refeed roller (38) is set to this lower position when the copy paper (81) is aligned in the intermediate tray (58) and refeed is performed. The -ra (38) presses against the copy paper (81) -1- aligned with the intermediate tray (58) I- by its own weight, and rotates in the direction of arrow (j) to transfer one copy paper (81). Saitsu re-feeding series (1st
(See Figure 5). In other words, the pressure required for refeeding is equal to the pressure required for refeeding [1-
If necessary, the paper refeed roller (38) may be urged downward by a spring or the like to apply paper refeed pressure.

[Copy paper alignment operation, see FIGS. 16 to 18] Here, the alignment operation of the copy paper (81) on the intermediate tray (58) will be explained according to the copying procedure.

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

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

Here, the switching levers (41), (59) (first
(see figure) is switched to the solid line position.

The regulating plates (63), (64), and (65) are shown in Figs.
It is moved by a stepping motor to the position shown in the solid line in Figure 8 and is on standby. This standby position is a position slightly wider than the selected copy paper size. That is, the leading edge regulating plate (64) waits slightly closer to the paper refeeding direction [arrow (g)] than the contact points of the reversing conveyance rollers (56) and (57). This is carried out by the intermediate tray (5) using the reversing conveyance rollers (56) and (57).
8) This is to prevent the rear end of the copy paper (81) fed upward from riding on the leading edge regulating plate (64) when it leaves the contact point of the reversing conveyance rollers (56) and (57).

The rear end regulating plate (65) waits at a position separated by a length B) from the waiting position of the leading end regulating plate (64). This length R
) is slightly larger than the selected copy paper size. As shown in FIG. 16, the side regulating plate (63) waits at a position slightly wider than the transport reference position (X,) of the copy paper (81). In this way, the reason why the side regulating plate (63) is made to wait at the retracted position from the transport reference position (X2) is because when the transport path of the copy paper (81) becomes long, the outer diameter of each transport roller in the axial direction This is based on the fact that an error in the conveying speed occurs in the width direction due to variations in the pressure contact force, and there is a possibility that the copy paper (81) is conveyed in a skewed state. In addition, the solenoid (70) is turned off and the other side regulating plate (62) is pressed in the direction of the arrow (h) by the coil spring (69), and stands by in a state where it swings to the solid line position (Fig. 18). reference).

On the other hand, the paper refeed roller (38) is set at the upper position shown in FIG.
) is retracted upward so as not to obstruct the feeding of the copy paper (81) from ).

(c) Next, set the number of copies.

Note that 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 section (42) or (43) is copied on one side according to the above-mentioned copying process,
The solid line in FIG. 18 (
After being transported as shown in e) and turning on the detection sensor (6o), it is reversed by transport rollers (58) and (57) and sent onto the intermediate tray (58) with the copied side facing upward.

b. Based on the on signal of the sensor (60), the solenoid (70) is turned on by the delay timer just before the leading edge of the copy paper (81) reaches the intermediate tray (58), and the side regulating plate (62) is turned on. , the transport reference position (Xl) in the direction of the arrow (ho)
It swings slightly outward. The reason why the side regulating plate (62) is retracted to a position slightly wider than the transport reference position (Xl) is to cope with the skew of the copy paper (81) as described above.

When the rear end of the copy paper (81) is completely conveyed to the intermediate tray (58), the solenoid (70) is turned off, and the side regulating plate (62) is moved by the coil spring (69) (see Fig. 5). ) is swung to the position indicated 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 in a state in which it is in contact with the other side regulating plate (63).

Hereinafter, steps A, B, and A are repeated until copy sheets (81) for the number of set copy plates are fed onto the intermediate tray (58), and each time a sheet of copy paper (81) is fed. The side regulating plate (62) swings and the copy paper (81)
) to the other side regulating plate (63) side (
(See Figures 24 and 25). The matching here is preliminary to ensure the final matching that will be performed later.

E, copy paper (81) for the number of copies is placed in the intermediate tray (58)
When sent upward, the solenoid (70) is turned on,
The side regulating plate (62) swings outward as shown by the dashed line.

In this state, the copy paper (81) is shifted from the transport reference position (x, ), (xp) in the width direction, so
Move the side regulating plate (63) to the normal position (X2) (see Fig. 26). The moving speed at this time is 30mm/s
A speed of about ec or lower is appropriate.

At this time, some of the copy sheets (81) are shifted in the direction of the arrow (ho) from the transport reference position (Xl) due to inertia (see FIG. 26). To align it, turn the solenoid (70) on and off multiple times and swing the side regulation plate (62) multiple times to ensure perfect alignment of the copy paper (81). do. In this process, the solenoid (
70) moves to the next step in the on state.

and connect the solenoid (+40) (see Figure 18) to 2.
The paper refeeding roller (38) is positioned at the lower stage and is brought into pressure contact with the copy paper (81) by its own weight (see FIGS. 15 and 22).

(9) Next, turn off the solenoid (70). The side regulating plate (62) swings inward due to the spring force of the coil spring (69), but a stopper (91) protruding from the holder (66) (
(see FIG. 10) and is set in the vertical direction at the transport reference position (X+) (see FIGS. 23 and 27). This is to prevent the copy paper (81) from being skewed during refeeding.

At the same time, by moving the slide member (73) to the state shown in FIG.
4) as a fulcrum in the direction of the arrow (i゛), and the guide plate (88)
Retract into the notch (88c). This is copy paper (8
This is to prevent the leading edge regulating plate (64) from interfering with paper refeeding in step 1).

When the above-mentioned operations are completed, a message indicating that double-sided copying is possible is displayed on the operation panel of the main body of the copying machine.

Also, the switching lever (41) is switched to the position indicated by the dashed dot line in FIG.

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

A. The main motor (not shown) is started and rotates each conveyance roller, etc. within the main body of the copying machine.

A clutch (not shown) of the four axes (86) (see FIG. 10) is turned on, and the paper refeed roller (38) is rotationally driven in the direction of arrow (j).

First, since the coefficient of friction between the paper refeed roller (38) and the copy paper (81) is higher than the coefficient of friction between the copy papers, only the topmost copy paper (81) is re-fed. , and are separated one by one by separation rollers (39) and (40).

After that, the copy paper (81) is transferred to the conveyor roller (32).

(33), (34M, see Figure 1) to the timing roller pair (13), and the toner image is transferred to the back side and fixed by the fixing device (9).
) to the ejection roller pair (15), and the tray (36)
is discharged to the top.

■Adjustment during composite copying: (a) Select the copy paper size in the same manner as in ■-(a) above.

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

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

The regulating plates (63) and (64) are moved by a stepping motor to the solid line positions shown in FIGS. 19 and 20 and are on standby. The rear end regulating plate (65) is connected to the conveying rollers (50) and (51).
Wait in a direction slightly opposite to the paper refeed direction [arrow (g)] than the contact point. This is the transport roller (50), (51
) is fed onto the intermediate tray (58).
1) This is to prevent the rear end from riding on the rear end regulating plate (65) when it leaves the contact point of the conveyance rollers (50) and (5+). The leading end regulating plate (64) waits at a position separated by a length (B) from the waiting position of the rear end regulating plate (65). This length B) is slightly larger than the selected copy paper size. In addition, the side regulation plate (62
), the solenoid (70) is turned off and the coil spring (69
) in the direction of arrow (h), and waits in a state where it swings to the solid line position (see Fig. 18).

On the other hand, the paper refeed roller (38) is set at the middle position shown in FIG. 14, and is retracted to a position where it does not interfere with the conveyance of the copy paper (81) on the intermediate tray (58), which will be explained below. .

(c) Next, set the number of copies.

Note that (a), (b), (c
) can be done randomly.

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

71 The copy paper that has been copied for the first time on one side is conveyed as shown by the arrow (f) in FIG. ) is fed into the intermediate tray (58)-H with the copied side facing down.

b. Based on the on signal of the sensor (61), the solenoid (70) is turned on by the delay timer just before the leading edge of the copy paper (81) reaches the intermediate tray (58), and the side regulating plate (62) is turned on. Transfer reference position (X,) in the direction of arrow (h')
It swings slightly outward.

one, the rear end of the copy paper (81) is in the intermediate tray (58) J-,
When it is completely conveyed, the solenoid (70) is turned off,
The side regulation plate (62) is a coil spring (see 69X diagram 5)
It swings to the solid line position in Fig. 19 by the spring force. At this time, the copy paper (81) fed onto the intermediate tray (58)
are preliminarily aligned in a state where they are in contact with the other side regulating plate (63).

The steps of 1, 1, 2 and 2 are repeated until the set copy paper (81) with the number of copies is fed onto the intermediate tray (58), and one copy paper (81) is fed. The side regulating plate (62) swings every time the copy paper (81
) to the other side regulating plate (63) side (
(See Figures 24 and 25). The matching here is preliminary to ensure the final matching that will be performed later.

E, copy paper (81) for the number of copies is placed in the intermediate tray (511).
)''-, the stepping motor is activated and the regulating plates (64) and (65) move forward [arrow (g)] to the refeeding position while maintaining the interval (B).

As a result, the copy paper (81) is conveyed to the paper re-feeding position by the intermediate tray (58)-J:.

Now, the solenoid (70) is turned on and the side regulating plate (62) is swung outward as shown by the dashed line.

G. In this state, the copy paper (8I) is shifted from the transport reference positions (XI) and (X2) in the width direction, so move the side regulating plate (63) to the transport reference position (x2) ( (See Figure 26). The moving speed at this time is 30mm/s
A speed of about ee or less is appropriate.

At this time, some of the four copy sheets (81) are shifted in the direction of the arrow (h'') from the transport reference position (Xl) due to inertia as described above (see Fig. 26). In order to align the copy paper (81), the solenoid (70) is turned on and off multiple times, and the side regulating plate (62) is swung multiple times to perfect the alignment of the copy paper (81). The solenoid (70) moves to the next step in the on state.

KE, set the solenoid (+40) (see Figure 1θ) to 1
The paper refeeding roller (38) is positioned at the lower stage and is brought into pressure contact with the copy paper (81) by its own weight (see FIGS. 15 and 22).

30 Next, turn off the solenoid (70). Said ■−(
The process is similar to d) -, and the side regulating plate (62) comes into contact with the stopper (9I) of the holder (66) and is set in the vertical direction at the transport reference position (Xl) (FIG. 23).

(See Figure 27).

At the same time, install the tip regulating plate (
64) is retracted into the notch (88a) of the guide plate (88).

When the operations 91 and above are completed, a message indicating that composite copying is possible is displayed on the operation panel of the main body of the copying machine. Also,
The switching lever (41) is switched to the position indicated by the dashed line in FIG.

(e) Turn on the print switch.

The above-mentioned steps ①-(e) ②, ②, and ② are executed, and composite copying is performed by overlapping the copied surface.

In the above alignment method, each sheet of copy paper (81) is fed onto the intermediate tray (58) one by one at a position shifted in the width direction from the transport reference position (X+) and (X2). After preliminary alignment is carried out at
, ), (X 2) and perform realignment. Therefore,
Matching becomes reliable and accurate, and re-feeding failures do not occur.

In addition, if a friction member such as rubber is provided at the bottom of the side regulating plate (63), it is possible to prevent the copy paper (81) fed onto the intermediate tray (58) from shifting, and to achieve more reliable alignment. It can be carried out. Further, the leading end regulating plate (64) is configured to swing and retreat from the +1 paper feed path of the copy paper (81) when refeeding, but the guide plate (88) functions at this time of retreat. It may also serve as

[Static charge removal mechanism for copy paper, Fig. 10, Fig. 31 to Fig. 30]
By the way, the copy paper (81) fed into the intermediate tray unit 1-(A) is caused by the discharge phenomenon caused by the transfer charger (5a) and the separation charger (5b), or by the fixing device (9) which is a pre-alignment process. When it is fixed into a toner image, it is heated and loses moisture, making it susceptible to being charged. In particular, during double-sided copying, the conveyance distance is long (passing through the conveyance block (11)), and as a practical matter, the sheet is charged. The charged copy paper (81) exerts an attractive force on each other, and when re-feeding, many sheets may be re-fed at once.
It goes diagonally.

Therefore, it is necessary to install a static elimination mechanism within the intermediate tray unit (A) to eliminate static electricity from the copy paper (81). It is preferable that the static electricity be removed immediately before the copy paper (81) is fed into the intermediate tray (58)-1-. Before that, for example, the unit (
'A) When carried out, the carrying roller (52)
, (53), (54), (55), etc., it becomes electrically charged. Further, since the copy sheets (81) become charged due to friction between them when the sheets are re-fed, it is necessary to remove the static electricity.

Specifically, as shown in FIG.
A stopper (+1) is attached to the frame (+14) of the unit (A) and is constantly biased upward by a torsion spring (+34) wound around the support shaft (86).
36). In addition, the guide plate (+3
3) Above there is a presser member (1) protruding from the holder (66).
32) extends, and a refeed roller (38) and a holder (6
6) is pressed by the holding member (+32) and swings downward about the support shaft (86) as a fulcrum.

FIG. 28 shows the case when the paper refeed roller (38) is set in the - stage, that is, when the copy paper (81) is fed into the intermediate tray (58) during double-sided copying. At this time, the position of the guide plate (133) is regulated by the stopper (+36), and is set at the same stage as the paper refeed roller (38). And the copy paper (81) is a static elimination blank (135)
The paper is sent onto the intermediate tray (58) from the transport rollers (56) and (57) while being in contact with the paper, and is neutralized (see FIG. 13).

FIG. 29 shows a case where the paper refeed roller (38) is set in the middle stage, that is, when the copy paper (81) is fed into the intermediate tray (58) l during composite copying. At this time, the guide plate (H3) is attached to the holding member (1,
32) and set in the same middle stage as the paper refeed roller (38) (see FIG. 14). At this time, the guide plate (+33) functions as a guide for the copy paper (81) in the same way as the holder (66) and the paper refeed roller (38), as will be described later.

FIG. 30 shows the state when the paper refeeding roller (38) is set at the lower stage, that is, when copying paper (81) is being refeeded.

At this time, the guide plate (133) is
) and set on the lower stage in the same way as the paper refeed roller (38). Then, the copy paper (81) is
35), the paper is re-fed while being in contact with the
(See Figure 5).

[Copy paper guide mechanism, see Figures 31 to 36] Copy paper (8
In case 1), there is a great risk of curling due to the heat effect during fixing.

When a large number of -1-curled copy sheets (81) are fed into the intermediate tray (58) J-, as shown in FIG. )
, the height of (65) is higher than E),
When the next copy paper (81) is fed in, the copy paper (81) gets on the regulation plate (65) as shown in FIG. 32. It is possible to regulate by setting the regulation plate (65) high, but in this case, the intermediate tray unit (A)
This is not desirable as the height of the area increases.

Therefore, as shown in FIG. 33 and FIG.
) and (65). In this case, the height B) of the guide member (92) is the regulation plate (64),
(65) is lower than the height E) of the guide member (92).
The distance (D) between the regulation plates (64) and (65) is set relatively narrow. This reliably prevents the copy paper (81) from riding on the regulation plates (64) and (65). Moreover, the reason why the interval (D) is narrowed is that if it is widened, the copy paper (81) deforms as shown by the two-dot chain line as shown in FIG. )
, (J5).

In addition, FIG. 33 shows the regulation plate (64) during double-sided copying,
(65), the regulating plates (64) and (65) have moved in the direction of the arrow (go) from the position shown in Fig. 33 during composite copying, and the regulating plates (64) crosses the guide member (92) 17, and the fed copy paper (
81) is prevented from getting on the regulating plate (64).

On the other hand, when feeding a long size copy paper (81) to the intermediate tray (58) J- during composite copying (see Fig. 14), the leading edge regulating plate (64) is positioned in front of the guide member (92). Therefore, the leading end of the curled copy paper (81) cannot be guided by the guide portion (92). Therefore, as mentioned above, the paper refeed roller (38), holder (66), and guide plate (+33) are set in the middle stage to guide the leading edge of the copy paper (81) and prevent it from running over the leading edge regulating plate (64). This is how it is regulated.

Note that if the guide member (92) is extended to the installation position of the paper refeed 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 paper refeeding direction, the transport roller (56)
), (57), the copy paper (81) comes into contact with the guide member (92). Further, the guide member (92) is connected to the frame (+0
6), (+07), and is attached to the transport block (I l
) is pulled upward when it is released, and at this time, it is necessary not to interfere with the conveying rollers (54) provided on the frames (113) and (114) of the unit (A).
It cannot be extended in the paper refeeding direction [arrow (g)] from the position shown in the figure.・Furthermore, for copy paper (81) that is curled upward in a direction perpendicular to the conveyance direction, as shown in FIG. This is taken care of by bending the copy paper (81) upwardly to prevent it from riding over the side regulating plates (62), (63).

Further, the guide plate (133) has a function of preventing the side portions of the copy paper (8I) from floating up on both sides during paper refeeding. That is, in this embodiment, the paper refeed roller (38) suppresses only the central portion of the copy paper (81), so that the copy paper (81), which is curled upward in the width direction, has both sides lifted up. If you refeed the paper in this state, it may cause skewed feeding or paper jams. Therefore, when refeeding paper, not only the paper refeed roller (38) and boulder (66) but also the guide plate (133) are positioned at the lower stage, and the holder (66) and guide plate (+33) ) are guided from above (see Figure 30).

[Alignment assisting mechanism during composite copying, see FIGS. 37 to 40] During composite copying, as shown in FIG. 50) and (51) onto the intermediate tray (58). When a large number of sheets of specially curled copy paper (81) are fed in, the trailing edge is lifted above the contact point between the transport rollers (50) and (51), and the next copy paper (81) fed in is jammed. This will result in

Therefore, in this embodiment, the conveyance roller (50) is connected to the support shaft (50).
0a) at predetermined intervals, and a plurality of elastic blades (96) (three in this example) were installed at arbitrary positions on the support shaft (50a). This elastic blade (
96) are attached to the outside of the trailing edge regulating plate (65) at a position where they can come into contact with both sides of the copy paper (81) being conveyed, and are arranged at equal intervals in the circumferential direction and in contact with the conveying roller (50). It is inclined in the direction of the rotation [arrow (m)].

In addition, the length I7) of the elastic blade (96) is the conveyance roller (
50) is longer than the radius (R) of the rear end regulating plate (
65) and the length G) are set to overlap (see Fig. 38).

Therefore, the elastic blade (96) rotates in the direction of the arrow (m) together with the transport roller (50), and as shown in FIG. Prevents the conveyance path from being blocked.

[Relationship between the reversing conveyance rollers (5B), (57) and the reversing guide plate (93), see Fig. 9] During double-sided copying, the copy paper (81) is transferred to the intermediate tray (5).
8) Reversing conveyance roller (5
6) , (57) and the reversing guide plate (93) must be configured to reliably reverse stiff copy paper such as thick paper, loose copy paper such as thin paper, or curled copy paper. No. Then, the reversing conveyance roller (56
), (57) diameter (Dυ, (Dt) and reversal guide plate (
93) and the distance between the contact points (I
After experimenting with various settings for 7), the following points were found.

(a) If the inter-roller pressure M(L) is short, in order to reverse stiff copy paper, the roller diameter (D) and guide radius (R) must be adjusted.
must become larger.

(b) Furthermore, if the inter-roller pressure #(I,) is short, the number of locations for installing the conveyance rollers up to the conveyance rollers (54) and (55) increases, leading to an increase in costs. Therefore, from a cost standpoint, the longer the distance between the rollers (■,), the better. However, a minimum size copy paper length is required.

(c) Larger guide radius (R) and roller diameter (Dt) are preferable for reversing copy paper. However, when it becomes excessive,
Unit (A) becomes larger.

(d) In a configuration like this unit (A) in which the copy paper is reversed immediately before feeding it into the intermediate tray (58), the reversing conveyance rollers (56) and (57) are the refeed rollers (38).
It is necessary to install the reversing conveyance rollers (56) and (57) between the unit ( A)
must be arranged in such a way that compactness can be achieved. For this purpose, a reversing transport roller (56) is used.

The diameters (D, ) and (Dt) of (57), especially the diameter (D, ) of the lower reversing conveyance roller (57), are preferably as small as possible.

In view of the above points, and considering smooth reversal of copy paper, miniaturization of unit (A), etc., roller diameter (D,) ≦
It is preferable to set the roller diameter (D , ) to satisfy the condition of roller radius (D , / 2 )≦guide radius (R), and this embodiment is configured in this way.

=43- Effects of the Invention As detailed above, in the present invention, the leading edge regulating plate for positioning the leading edge of the copy paper fed onto the intermediate tray in the re-feeding direction is fixed to Because it is retracted from the paper refeed path 2, it is only necessary to move the leading end regulating plate of the copy paper, which is a relatively small member, and the moving mechanism is simpler than the conventional one in which the intermediate tray is swung. The copying machine itself can be made smaller, requiring less space for movement.

[Brief explanation of the drawing]

The drawings show an embodiment of a copying machine according to the present invention, in which FIG. 1 is an overall configuration diagram, FIG. 2 is a perspective view of the unit when it is pulled out, and FIG. 3 is an internal configuration diagram of the unit. FIG. 4 is a perspective view of the locking mechanism, FIG. 5 is an exploded perspective view of the alignment mechanism and paper refeeding mechanism, and FIG. 6 is a perspective view of the regulating plate attachment section. FIGS. 7 and 8 are explanatory views of the operation of the tip regulating plate. FIG. 9 is a front view illustrating the relationship between the paper refeeding section and the conveying rollers of the reversing block. Figure 10 shows the paper refeed roller rocker 44.
= A perspective view of the moving mechanism, FIG. 11 is an explanatory diagram of the operation of the refeeding roller swinging mechanism, FIG. 12 is a sectional view of the clutch means, and FIGS. 13, 14, and 15 are the refeeding roller, etc. FIG. 16 to 23 are for explaining the operation of the alignment mechanism, and FIG. 16 is a plan view during reverse copying, and
Figure 7 is a front view of Figure 16, Figure 18 is a side view of Figure 16, Figure 19 is a plan view during composite copying, Figure 20 is a front view of Figure 19, and Figure 21 is a paper refeed. 22 is a front view of FIG. 21, and FIG. 23 is a side view of FIG. 21. FIG. 24, FIG. 25, FIG. 26, and FIG. 27 are all explanatory diagrams of the copy sheet alignment operation. FIG. 28, FIG. 29, and FIG. 30 are explanatory diagrams of the operations of the paper refeed roller and the static elimination brush. 31 to 36 are for explaining the copy paper guide mechanism.
Figures 2 and 33 are front views, Figures 34, 35, and 36.
The figure is a side view. 37 to 40 show the copy paper feeding portion during composite copying, FIG. 37 is a side view, FIG. 38 is a sectional view, and FIGS. 39 and 40 are operation explanatory diagrams. (38)・Refeed roller, (58)・Intermediate tray,
(64)・-Tip regulation plate, (73)・Slide member,
(74)...Spindle, (76)...Torsion spring, (77
)・・Slide rail, (88)・Guide plate. Patent Applicant Minolta Camera Co., Ltd. Agent Patent Attorney Aobai Ao and 2 others Figure 24, 825, 28, 29

Claims (1)

[Scope of Claims] 1. In a copying machine in which copy paper after copying is sequentially stacked on an intermediate tray installed in the copying machine main body and then re-fed, the copy paper fed onto the intermediate tray is A copying machine characterized in that a leading edge regulating plate for positioning a leading edge in a paper refeeding direction is retracted from above a copy paper refeeding path during paper refeeding.