JPS63318535A - Document conveyer - Google Patents

Abstract

PURPOSE:To shorten the time when no processing document exists in a processing part by providing a control means which accelerates the speed of conveying documents at least at a time when no processing document exists in the processing part higher than the speed of conveying document in the middle of processing. CONSTITUTION:A copying machine main body 1 is provided with the control part 201. It sets the period from the time when a synchronizing sensor 85, which is provided on halfway a normal route from the document stacker 3 of a document conveyer 2 to the processing part 36, kicks the tip of a document to the time when exposure starts, and it sets the timing when a paper feed means 216 or 221 feeds a transfer sheet. The control part 201 speeds up the rotation of a main motor 100 and controls it so that the conveyance of documents when the platen glass (processing part) 36 is not processing documents can be accelerated higher than the conveyance of documents when the processing part is in the middle of processing. Thus all or some of the time apart from the document exposing time can be shortened.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention feeds a stack of originals stacked on an original stacker to a processing section one by one, and returns them to the original stacker after exposure processing, so that the stack of originals goes through one cycle. The present invention relates to a document conveying device that is capable of repeatedly feeding sheets and making copies of a portion of the document bundle each time it is circulated.

[Background of the invention]

In general, in this type of document transport device, the forward path that connects the document stuff car to the processing section and the paper ejection path that connects the processing section to the document stacker are often in a closed loop. The set original is reversed while passing through the forward path from the original stacker to the processing section, and is turned over again while passing through the paper ejection path from the processing section to the original stamper, returning to its original state. Therefore, a single-sided original, that is, the original with the original side facing up on the original stacker, will be turned with the original side facing down in the processing section.
Exposure processing can be performed as is, but in the case of a single-sided original,
When copying a document with its surface facing downward on the document stacker, the document sent to the processing section has the side to be copied facing upward, so it is necessary to further flip the document upside down. For this reason, in this type of apparatus, a reversal path is provided which draws a loop from the processing section and communicates with the upper part of the forward path. Therefore, when copying even-numbered pages of a 9-sided original, the original is fed unexposed from the original stacker to the processing section through the forward path, and then reversed from the processing section through the reversing path and fed to the processing section again. (2) The exposed document must also be reversed from the processing section through a reversing path, passed through the processing section again unexposed, and returned to the document stacker from the paper ejection path.

However, in the case of conventional devices, the document conveyance speed described in (1) and (2) above was performed at the same speed as the exposure processing speed in the processing section, so it took a very long time to copy one side of an even-numbered page of a double-sided document. It was supposed to take place. Therefore, the advantages of this type of apparatus, which would be very effective when a large number of originals and a large number of copies are to be made, cannot be fully utilized.

[Purpose of the invention]

This invention is intended to solve the above problem.

It is an object of the present invention to provide a document conveying device that can shorten the time during which there is no document being processed in a processing section.

[Structure of the invention]

In order to achieve the above object, the present invention provides a document feeder that feeds documents stacked on a document slider one by one to a processing section, processes the documents while moving them in the processing section, and discharges the documents. A control means is provided for making the document conveyance speed faster than the document conveyance speed during at least part of the time when there is no document being processed in the processing section, and It is configured to enable processing.

〔Example〕

Next, the present invention will be described based on embodiments shown in the accompanying drawings.

In FIG. 1, 1 is the main body of the copying machine, and 2 is a document conveying device. The document conveyance device 2 includes a document stumper 3 whose front part is curved, and a trailing edge regulating plate 5 is provided on the document stumper 3 for abutting the trailing edge of the document 4 when setting it.
and width regulating plates 6, 6 for regulating the width direction of the document 4.
' is provided. This trailing edge regulating plate 5 is at the detection position of the means (stack sensor) 27 for detecting the leading edge of the document 4 set on the document stacker 3 near the paper feed port! (Fixed position)
It has the ability to extrude up to The amount of movement of this trailing edge regulating plate 5 differs depending on the length of the document, so the amount of movement of the trailing edge regulating plate 5 is
As shown in the figure, the length of the document can be determined by detecting it with a movement amount detection sensor 501.

Further, the width regulating plates 6.6' are connected to racks 6b and 6b' which can alternately slide laterally across the pinion gear 6a on the lower surface of the document stacker 3, and are arranged in the center according to the width of the document. It is movable symmetrically. Since this width regulating plate 6.6' is manually adjusted to the width of the document, the horizontal size of the document can be determined by detecting its position with a position detection sensor 601 as shown in FIG.

7 is in the raised position when the document 4 moves forward due to the pushing action of the trailing edge regulating plate 5, and when the leading edge of the document reaches the detection position of the stack sensor 27.

This gate member is lowered by a signal from the stack sensor 27 and placed on the document 4 by its own weight or by a spring. This gate member 7 has the function of holding down the document 4 to be fed by its own weight or a spring, and abutting the leading edge of the document that has passed through the processing section 8 and returned onto the document stacker 3 as described later.

It has a function to align the leading edge of restacked originals and to reliably distinguish between restacked originals and the original being fed.

However, in order to effectively exhibit these functions, in this embodiment, ribs 3a are provided protruding from the upper surface of the document stacker 3 at appropriate intervals along the paper feeding direction as shown in the second figure. A plurality of protrusions 7a are provided on the lower edge of the gate member 7 corresponding to the spaces between the ribs 3a, forming a so-called comb-teeth shape. That is.

By deforming the original on the original stacker 3 into a waveform as shown in FIG. This effectively prevents the tip from slipping under the gate.

The gate member 7 is formed into a U-shape in plan, and both sides 7b, 7c of the gate member 7 are provided with brackets 10, 10, 10, 10, 10, 10, 10, 10, 10, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11 of 11 of 11 that that a bracket 10. Shaft 1 rotatably mounted on the upper side of 10'
Left and right gate levers 1 with their proximal ends loosely attached to 1.
It is pivotally supported by the distal end of the bracket 10.12' and the distal end of an auxiliary lever 13.13' whose proximal end is pivoted on the underside of the bracket 10.10'. And gate lever 12゜12'
is an overhanging portion 12a at the upper part of the inner edge side.

123' is provided, and a push-up pin 14, 14' implanted in the shaft 11 corresponds to the lower surface of the push-up pin 123'.

This shaft 11 has a sector gear 1 fixed to its end.
5, the gate cam gear 16 meshes with a small gear 16' which is coaxial with the gate cam gear 16, and the gate cam gear 16 is linked to an output gear 17' of a gate drive source 17 which can be rotated in forward and reverse directions. Therefore, when the shaft 11 is driven by the gate drive source 17 and rotates clockwise, the push-up pins 14, 14' move the gate levers 12 and 12' to their overhanging portions 12a, 12a'.
4A to raise the gate member 7 as shown in FIG. 4A. In addition, when the shirt 11 is rotated counterclockwise in the raised position of the gate member 7 under the drive from the drive source 17, the gate lever 12.12' resting on the push-up pin 14.14' is moved. Rotate it downward.

The gate member 7 is lowered as shown in FIG. At this time, the push-up pins 14, 14' are designed to escape at an angle greater than the angle at which the gate member 7 hits the original on the original stacker 3. Therefore, the gate member is configured to hold down the original on the original stacker 3 by its own weight or by a spring.

Since the gate member 7 follows the auxiliary levers 13 and 13' when it moves up and down, the front surface of the gate remains substantially perpendicular to the upper surface of the document stacker 3. In other words, the gate member 7 allows the front surface of the gate to be placed at a substantially right angle to the originals, regardless of the number of originals.

The gate cam gear 16 is provided with a tongue piece 19 that blocks the detection sensor 18 at its initial position. The sensor 18 sets the home position of the gate cam gear 16 when the tongue piece 19 shuts off the drive source 17.
can be rotated in the correct direction by the required angle. In this case, it is preferable to use a pulse-controllable stamping motor as the drive source 17.

Reference numeral 20 denotes a push-out belt that pushes out the document at a fixed position to the paper feed position as described above, 21 a paper feed belt that sends out the document at the paper feed position from the bottom layer, and 22 a push belt that is in contact with the paper feed belt 21 to push out the document at the paper feed position. This is a stop roller that prevents the machine from moving. The paper feed belt 21 has an electromagnetic clutch 21a installed on its shaft.
and the main motor 1 via a one-way control means (not shown).
The belt is stretched between a drive shaft 23 connected to the drive shaft 23 and a driven wheel 23', and its upper belt surface slightly protrudes from the lip 3a of the document stacker 3.

The stop roller 22 is attached to a fixed shaft via a spring clutch 24. This spring clutch 24 is the fifth
As shown in FIG.
Spring boss 2'4d.

24d' to allow the stop roller 22 to rotate freely (driven rotation) relative to the fixed shaft, and when the clutch lever 25 is not acting on the protrusion 24b of the outer cylinder 24, the rotation of the stop roller 22 is restricted ( This clutch lever 25, which can be locked (locked), is pivotally supported in a hanging manner at the tip of an arm 26 fixed to the shaft 11 in a direction opposite to the push-up pin 14 of the gate lever.

Therefore, when the gate member 7 rises via the pin 14 due to the rotation of the shaft 11 as shown in FIG. 4A, the clutch lever 2
5 is lowered and pushes the protrusion 24b of the spring clutch 24 in the clockwise direction, while the gate member 7 is lowered and placed on the original 4 by rotating the shaft 11 in the opposite direction as shown in FIG.
The clutch lever 25 separates upward from the protrusion 24b of the spring clutch 24, and the spring clutch 24 returns to its original position by the action of the built-in spring, thereby regulating the rotation of the stop roller 22.

The extrusion belt 20 is formed of a perforated belt stretched between so-called half-moon rollers 28 and 29 whose outer periphery is partially cut out. This half-moon roller 28, as shown in FIG. 7, receives driving force from the main motor 100 through a one-turn spring clutch 30 in the same way as the paper feed belt 21.

In the one-turn spring clutch 30, the protrusion 30b provided on the outer cylindrical body 30a hits the tip of the clutch lever 31, which is rotatable in a seesaw shape around a shaft fulcrum 31' as shown in FIG. When the rotation of the body 30a is restricted, the clutch spring 30c built into the body 30a moves against the spring boss 30.
d, 30d' (see Figure 7) loosens and the main motor 1
While the driving force from 00 is disconnected, when the tip of the clutch lever 31 comes off the protrusion 30b of the outer cylinder 30a of the spring clutch 30 as shown in FIG. 8B, the clutch spring 30c moves to the spring boss 30d.

30d', the main motor 100
The drive from is transmitted to the half-moon roller 28.

The rear end side of the flange lever 31 is a gate cam gear 16.
The cylindrical portion 16a is pressed against the cylindrical portion 16a by the spring force of the tension spring 31a, and a cam-shaped portion 16b is formed on a part of the circumference of the cylindrical portion 16a.
is provided. Therefore, when the gate cam gear 16 is rotated by the operation of the gate drive source 17 and the cam-shaped portion 16b pushes down the rear end side of the clutch lever 31, its tip disengages from the protrusion 30b of the outer cylindrical body 30a of the spring clutch 30. It looks like this.

This rocking of the clutch lever 31 is performed in a rotation region of the gate cam gearwork 6 that is unrelated to the vertical drive of the gate member 7 when the gate member 7 is lowered. That is, as described above, the gate cam gear 16 has a home position (indicated by the symbol P in FIG. 8) determined by the initial position detection sensor 18 and the tongue piece 19, and rotates in a counterclockwise rotation range from that point P. S1 is used to move the gate member 7 up and down, and the rotation area St in the clockwise direction is used to swing the clutch lever 31. By the way, 9. Rotation area S of the gate cam gear 16 used for this swing! Now push up pin 1
4 escapes from the gate lever 12.

As mentioned above, the tip of the clutch lever 31 is connected to the outer cylinder body 3.
When the half-moon roller 28 comes off the protrusion 30b of 0a and the main motor 100 starts rotating, the gate cam gear 16 rotates counterclockwise due to the reverse rotation of the gate drive source 17, and the rear end side of the clutch lever 31 is rotated by the cam. shape 16
Off from b1. Since the tip of the protrusion 30b is returned by the spring 31a located close to the outer cylindrical body 30a of the spring clutch 30 that has passed, the outer cylindrical body 3Qa of the spring clutch that has rotated once along with the half-moon roller 28 Protrusion 30
b hits the tip of the clutch lever 31 again and disconnects the driving force from the main motor 100. Therefore, the half-moon roller 28 always makes one complete rotation and stops.

Further, as shown in FIG. 2, the extrusion belt 20 is provided in through holes 32 arranged side by side at a plurality of locations (three locations in the figure) on the original stamper 3. The peripheral edge of this through hole 32 is raised to the same height as the rib 3a on the document stacker 3, and the front side in the paper feeding direction (the part near the rear edge of the document) is designed to prevent the leading edge of the document from getting caught.
It is an inclined surface 32a. When the notches of the half-moon rollers 28 and 29 are on top as shown in FIG. It stands out when it becomes. In other words, the document 4 in the fixed position on the document stamper 3
is extruded by the friction of the extrusion bell (20) which protrudes from the through hole 32 by one rotation of the half-moon rollers 2B and 29. In this case.

Since the paper feed belt 21 is stationary due to the power from the main motor 100 being cut off by the action of the electromagnetic clutch 21a, the leading edge of the pushed out document is held at the two prongs of the paper feed belt 21 and the stop roller 22 ( It will cut into the draft at the cutting point).

Reference numeral 33 denotes a suction box provided to surround the extrusion belt 20 from the lower surface side of the document stacker 3, and the suction box 33 pushes one of the lowest sheets of documents into the through hole 32 by the suction action of its suction fan 34. It is configured so that the extrusion force of the extrusion belt 20 can be effectively exerted by adsorption in the gap between the extrusion belt 20 and the belt hole.

Reference numeral 35 denotes a forward path for guiding the original sent out from the paper feed belt 21 onto the platen glass 36 of the copying machine 1, which serves as the processing section 8; The first reversing path 37, which is a reversing path for reversing after exposure, is used to reverse and correct the even-numbered pages of a double-sided document so that it faces the platen glass 36,
This is to enable the page order to be reversed and corrected again when the corrected and exposed original is returned to the original stamper 3, and the forward path 35 draws a loop upward from the same surface as the platen glass 36. It is designed to merge with the upper side of the.

38 is a conveyance roller provided in the middle of the forward path 35;
9 and 40 are conveyance rollers provided in the middle of the reversing path 37, and these conveyance rollers 38, 39, 40 are connected to the main motor 100 via a one-way control mechanism so that they can always rotate in the same feeding direction. ing.

Reference numeral 41 denotes a conveyor belt for conveying the original on the upper surface of the platen glass 36 in the forward and reverse directions.

The conveyor belt 41 is stretched between a first roller 42 on the paper feed side (inlet side) and a second roller 43 on the paper discharge side (exit side), which are connected to the main motor 100 via a forward/reverse switching means 101. It is set up. Thus, a tension roller 44 is pressed against the upper belt surface near the first roller 42, and the lower belt surface is brought into sliding contact with the platen glass 36 by a plurality of pressing rollers 45.

The first roller 42 and the second roller 43 are connected to each other by a timing belt 46 as shown in the first O diagram. In this case, the timing pulley 47 on the first roller 42 side is fixed to the first roller shaft 42a, and the timing pulley 48 on the second roller 43 side is attached to the second roller shaft 43a via a one-way clutch 49.

Therefore, the conveyor belt 41 moves in the forward direction (arrow in FIG. 10).
When the belt rotates, it runs by the driving force from the first roller 42, and at this time, the lower belt surface is on the slack side. In this case, the second roller 43 is connected to the one-way clutch 49
However, if the conveyor belt 41 slips with some object, such as the first roller 42, and the driving force is not sufficiently transmitted, the running speed of the belt 41 decreases. In this case, the second roller 43 becomes the driving side due to the locking action of the one-way clutch 49, so that the conveyor belt 41 can be driven.

Further, when the conveyor belt 41 is rotated in a direction opposite to the above direction (counterclockwise direction), the one-way clutch 49 is locked and the second roller 43 becomes the driving side of the conveyor belt 41. That is, the *transport belt 41 may run with the first roller 42 on the driving side, or may run with the second roller 43 on the driving side. This is particularly effective when synchronized exposure is performed while the original is being fed on the platen glass.

Reference numeral 50 denotes a document stopper provided at the paper discharge side end of the platen glass 36, and as shown in FIG. The solenoid 53 connected to the other end of the operating lever 51 and a spring 51' opposing the solenoid 51 allow the operating lever 51 to move in and out of the platen glass 36. This document stopper 50 is RD
In the F mode, the solenoid 53 is energized,
Slide down from the platen glass 36 and open the ADF (SD
In the F) mode, it protrudes above the platen glass 36.

Reference numeral 54 denotes an exposure optical system installed below the platen glass 36 of the copying machine main body l, and the exposure optical system 54 is an RDF
In the ADF (SDF) mode, the appropriate position on the platen glass 36 near the paper feed side remains stationary as a fixed exposure position 541).
) mode, the platen glass 36 is configured to be able to move back and forth with a suitable position near the sheet discharge side set as a starting position 54p' for moving exposure.

Reference numeral 55 indicates a paper discharge guide plate continuous to the exit side of the platen glass 36, and 56 indicates a paper discharge belt. The paper ejection belt 56
is pivotally supported immediately after the original stamper 3, and the main motor 1
00 and upper and lower end rollers 5B and 59. A roller group consisting of auxiliary rollers 60 and 61 supported near the paper ejection guide plate 55 is stretched so as to wrap around the rear side of the document stacker 3 in a C-shape, and is conveyed by the rotation of the drive roller 57. The document sent out from the belt 41 can be conveyed in the paper ejection direction.

upper and lower end rollers 5B of the paper ejection belt 56;
Reference numeral 59 denotes two parallel horizontal grooves 63 and 64 provided in both side skeletons 62 and 62 constituting the document transport section 2 as shown in the twelfth figure.
The upper moving bodies 65, 65 and the lower moving bodies 66, 66, which are slidably held via roller members, are mounted on shafts, respectively, and each moving body 65, 66 is attached to the skeletons 62, 62 on both sides. Sprockets (can be replaced with wire pulleys) 67.
It is connected via attachments 70 and 71 to the upper and lower sides of a chain (wire) 69 stretched between 67', 68 and 68'. and.

One of the sprockets 67 is connected to a chain drive source 72 which can be reciprocated in forward and reverse directions via an intermediate gear 72', as shown in FIG. Therefore, when the chain 69 runs with forward and reverse rotation of the chain drive source 72, the upper end roller 58 and the lower end roller 59 move oppositely to each other, and the paper ejection belt 56 always maintains its belt tension. It is designed to be able to move forward and backward in a constant state.

The movement mechanism of the paper ejection belt 56 is configured as a movement control mechanism of the trailing edge regulating plate 5 against which the trailing edge of the document is abutted when setting the document on the document stacker 3. The upper end roller 58 is attached to the upper moving body 65.
It is installed to cover the front of the Therefore, after setting the document on the document stacker -3 so as to abut against the trailing edge regulating plate 5, the chain drive source 72 is connected to the upper moving body 65.
When the rear end regulating plate 5 is driven to move forward, the rear end regulating plate 5 moves forward while pushing out the document. This rear end regulating plate 5
The lower edge of the document stacker 3 has a convex portion 5 that can fit into a shallow concave concave concave portion 3b parallel to the paper feeding direction provided on the rear upper surface of the document stacker 3.
a is provided to prevent the document to be pushed out from slipping under the trailing edge regulating plate 5.

Reference numeral 73 denotes a home position sensor for the rear end regulating plate 5, and the sensor 73 determines the position where the blocking member 74 provided on the attachment 70 connected to the upper side of the chain 69 is detected as the home position of the rear end regulating plate 5. This home position is a position where the rear end of the maximum size document (for example, A3 size) can be brought into contact with the document, and as shown in FIG. 27 and the control unit 721 receives the detection signal.

After a certain pulse, the chain drive source 72 is stopped.

Control is performed so that the positions are set as advance points 5p+ and 5pz-5pn (varies depending on the document size) and are moved backward. In this case, the control unit 721 controls the movement it from the home position 5p to the advance points 5p+, 5pz-5pn.
Based on the document size (!Iia length in the feeding direction) determined by the signal from the detection means 50-1, the trailing edge regulating plate 5 is moved from the front of the gate member 7 by the corresponding size, that is, until the leading edge of the document passes through the gate member 7. The originals are re-stacked after they have been returned to the original stuff car after being recirculated. This is to minimize the amount of advance of the trailing edge regulation Vi5 during paper refeeding.

Reference numerals 75 and 76 denote presser rollers that come into contact with the paper ejection belt 56 from the outside of the paper ejection guide plate 55 through through holes at positions corresponding to the auxiliary rollers 60 and 61.

Reference numeral 77 denotes a ceiling guide plate whose base end is hinged to the upper rear ends of the both side skeletons 62 of the main body 2, and 78 refers to the upper surface of the upper belt portion of the paper ejection belt 56 attached to the upper stage moving body 65 on which the tensigine roller 58 is mounted. A paper discharge log guide plate 79 facing the paper discharge log guide plate 78 with a slight gap is a presser roller that contacts the paper discharge belt 56 through a through hole from the upper surface of the paper discharge log guide plate 78. The ceiling guide plate 77 is provided with a plurality of ribs 80 facing in the paper ejection direction on its lower surface, which serves as a guide surface, so as to be able to impart directionality to the original.

A concave groove 81 provided on the upper edge of the upwardly inclined rear plate of the paper ejection log guide plate 78 is fitted into the rib 80 in an irregular manner, and the document that has advanced along the guide surface of the ceiling guide plate 77 is guided to the paper ejection log guide plate 78. and the paper discharge belt 56.

Reference numeral 82 denotes a switching claw provided in the middle of the paper ejection guide plate 55 for switching the processed original between a circulating paper ejection path A that leads to the original stamper 3 and an external paper ejection path B that leads to the paper ejection tray 83 outside the machine. , the switching pawl 82 is movable to open the external paper ejection path B when the trailing end regulating plate 5 returns to the home position, and opens the circulating paper ejecting route A when the trailing end regulating plate 5 is not at the home position. It is movable so that it can be opened. This switching action may be accomplished using a solenoid or other suitable mechanical mechanism.

Reference numeral 84 denotes a manual feed plate whose proximal end is hingedly connected to the top surface of the top end of the ceiling guide plate 77. Usually, the manual feed plate 84 is
As shown in the figure, it is folded so as to overlap the top surface of the ceiling guide vi77, and can be unfolded to cover the document stacker 3 using the hinge joint as a fulcrum when feeding documents one by one in SDF mode. . When unfolded, the tip of the two-manual feed plate 84 reaches near the paper feed belt 21. Also 1
The manual feed plate 84 has a mark indicating the size of the document to be fed on the top surface when unfolded, so that the document insertion position can be known. Furthermore, it is convenient to configure so that an SDF actuator (not shown) is turned on when the manual feed plate 84 is unfolded.

As shown in FIG.
The light from the light source 541 of the exposure optical system 54 is irradiated onto the document fed from the document stacker 3 and sent onto the platen glass 36 via the forward path 35, and the reflected light is sent to the photoreceptor via a mirror. The drum 211 is irradiated. Around the flame drum 211, a charger 212. Developing device 213.
A paper feeding means 21 that includes a transfer device 214 and a cleaning box 215 and feeds a transfer sheet from a sheet storage container between the photosensitive drum 211 and the transfer device 214.
6a to 216C, a fixing device 217 for fixing the developer to the sheet after transfer is provided. The copy sheet obtained by transferring the original information by the transfer device 214 is sent to the final processing unit 300 when only one-sided copying is required, and when the back side also needs to be copied (double-sided copying).
are stored in a sheet stunker 220 provided below the photoreceptor drum 211 from a branch point 219 provided in the middle of the path 218 toward the final processing section 300 with the copy side facing upward. The single-sided copy sheet accommodated in the sheet stuff car 220 is fed out from the bottom by the paper feeding means 221, and is supplied to the transfer device 214 with the back blank side facing the photoreceptor drum 211 side, and after two-sided copying, the fixing device 217
The data is then sent to the final processing unit 300.

This final processing section 300 includes a lower tray 301 having punching means for making binding holes in copy sheets and binding means using staples.

An upper tray (offset tray) 302 that does not have such means is provided. When the final processing mode is selected, the copy sheet is stored in the lower tray 301, and when 1 is not selected, the copy sheet is stored in the upper tray 302 via the branch point 303. provides a means for stacking and storing copy sheets by shifting them alternately by a certain amount for each page, so that the subsequent sorting work is facilitated.

The copying machine main body 1 is provided with a synchronization sensor 85 provided in the middle of the forward path 35 that communicates from the document stacker 3 of the document conveyance device 2 to the processing section 8. The timing from when the leading edge of the document kicks a synchronization sensor 85 until the start of exposure, when the transfer sheet is Paper feeding means 216 or 221
A control unit 2 for setting the timing for feeding paper, etc.
01 is provided. Further, the control unit 201 controls the conveyance speed of the document to be faster than the conveyance speed of the document being processed during at least part of the time when there is no document being processed on the platen glass (processing portion) 36 . Here, the time during which there is no original being processed means (a) when copying the side of the original facing upward on the original stacker, such as copying a single-sided original or copying odd-numbered pages of a double-sided original; The time it takes for the leading edge of the document to kick the synchronization sensor 85 on the forward path 35 from the stacker 3;
(b) The time it takes for a processed original to be ejected from the time when the trailing edge of the original comes out from the processing unit 8 to the original stacker 3; When copying the side of the original that is
(a) Time required for feeding the original from the stacker 3 through the forward path 35 to the processing section 8 without exposure.

(bl) From the processing unit 8 through the reverse path 37 to the forward path 3
(C) Time until the leading edge of the document kicks the synchronization sensor 85 provided in the middle of step 5, (C) Time until the processed document passes from the processing section 8 through the reversing path 37 to pass through the processing section 8 unexposed, (d) This refers to the time from when the trailing edge of the document comes out from the processing section 8 to when the document is discharged to the document stacker 3 through the paper discharge path.

The control during the above time is such that the control unit 201 accelerates the rotational speed of the main motor (using a DC motor) 100, and the paper feed belt 21 connected to this. Conveyance roller 381 on the forward path 35 Conveyance roller 39.40 on the reverse path 37
This is done by increasing the rotational speed of the conveyor belt 41 on the platen glass 36, but using a plurality of motors, the above ■-(a), (b), and ■-(a) to (d) It may be configured to speed up only part of the time.

In the embodiment described above, the originals are stacked with the copy side facing up, aligned in page order from the top, and set with the rear ends abutting against the rear edge regulating plate 5 at the home position. After regulating the width direction with the width regulating plate 6.6', turn on the RDF mode button and select the following modes: 1-sided original - 1-sided copy, 1-sided original - 2-sided copy, 2-sided original - 1-sided copy, and 2-sided original 1-screen copy. After selecting and inputting the number of copies to be made, turn on the copy button. As a result, the gate drive source 17 that drives the gate member 7 is activated, and the gate member 7 is raised to a position where the stacked documents can sufficiently enter therebeneath.

Next, the chain drive source 72 is driven, and the trailing end regulating plate 5 moves forward to push out the document in the paper feeding direction so that it passes under the gate member 7. Then, when the leading edge of the document is detected by the stack sensor 27.

The drive source 17 operates to lower the gate member 7. At this time, the pin 14 installed on the shaft 11 supporting the gate lever 12 rotates to a position sufficiently away from the gate lever 12. Therefore, regardless of the amount of documents, the gate member 7 can always press the top surface of the document downward by its own weight or by a spring.

Further, the lower edge of the gate member 7 has a comb-like shape,
Coupled with the upper surface rib 3a of the original stamper 3, the original is pressed against the paper feed belt 21 while forming a waveform.

As mentioned above, when the push-up pin 14 is sufficiently far away from the gate lever 12, the gate cam gear 16 is connected to the drive source 1.
7, and the half-moon roller 28,
29 is connected to the main motor 100 and the extrusion bell) 20 is run, the original is transferred to the paper feed belt 21 and the stop roller 2.
It is pushed out towards the nip with 2. At this time, the paper feed belt 21 remains unrotated due to the action of the electromagnetic clutch 21a, so the pushed-out document enters the model between the nip between the paper feed belt 21 and the stop roller 22 than the lower layer. Stop.

Next, at t, the electromagnetic clutch 21a is turned on, and the paper feed belt 21 rotates in the paper feeding direction. At this time, the stop roller 22 in contact with the paper feed belt 21 is maintained in a non-rotating state, so the bottom layer of the document is sent out by the paper feed belt 21, and the second and subsequent documents are transferred to the stop roller. 22 to prevent one double feed. When the paper feed belt 21 rotates, the extrusion belt 20 also starts in synchronization, and during one rotation it attracts and separates only the bottom document sheet from the stack of documents stacked above it, and in the paper feed direction. It acts to push it towards. In other words, the double feeding prevention function of the stop roller 22 is further improved.

Thereafter, the trailing edge regulating plate 5 is retreated from the gate member 7 to approximately the size of the document.

Further, a sheet of original sent out by the paper feed belt 21 enters the forward path 35, is nipped by the conveyance roller 38 on the way, and is directed between the platen glass 36 and the conveyance bell 1-41 at a synchronous exposure speed. transported by After the leading edge of the document crosses the synchronization sensor 85 provided in the middle of the forward path 35 (directly below the conveyance roller 38) and after the timing for each size (
The larger size is longer (the size is determined by detecting the stop position of the rear end regulating plate), and the electromagnetic clutch 21a is turned off.

The original transported by the transport roller 38 is transferred to the transport belt 41.
While being transported over the platen glass 36 at a synchronous exposure speed, the light is exposed by the optical system 54 located at a fixed exposure position. The original after exposure processing moves upward along the paper ejection guide plate 55, and is moved up by the paper ejection heald 56 and the presser rollers 73 and 7 that are in pressure contact with the paper ejection heald 56.
4, exits to the upper surface side of the paper ejection belt 56, moves forward on the guide surface of the ceiling guide plate 77, is exclusively placed under the paper ejection log guide plate 78, and comes into contact with the paper ejection belt 56. The document passes between the document presser roller 79 and the document stacker 3 and is discharged.

In this way, the originals discharged onto the original stamper 3 collide with the gate member 7 and are aligned for the next feeding. In this case, since the lower edge of the gate member 7 has a comb-like shape, the document is prevented from slipping under the gate member.

The document conveyance operation is repeated with the feed timing and synchronized conveyance speed determined for each copy size and copy magnification until there is no document under the gate member, and the stack sensor 27 detects that there is no document under the gate. When it is detected that the last document has been ejected by the second paper ejection sensor 86b, the gate member 7 is raised again and the stacked document is sent out by the trailing edge regulating plate 5, and the above-mentioned process is continued until the set number of copies is completed. The operation is repeated, and when the set number of copies is completed and this is detected by the second paper discharge sensor 86b, the trailing edge regulating plate 5 returns to its home position and prepares for the ninth operation.

During operation, the main body control section 201 controls the main motor 100 to increase its rotational speed during a time when there is no document being processed on the platen glass 36.

The above operation is performed when starting in the single-sided copy mode of a single-sided original, but when starting with double-sided copying of a single-sided original, first, the original set on the original stacker is unexposed and rotated once, and the number of sheets is counted. It is determined whether the number is an odd number or an odd number. In this case, the number of sheets is counted by the forward route 35.
The counting counter (
(not shown). As a result, if the number of original sheets is 4, for example, the copying machine main body 1 copies the fourth and final page sent from the original transport device 2 to the platen glass 36, and then stacks them on the sheet stacker 220 and Paper is fed from the stacker 220, the third page is copied, and the paper is ejected. In the same way, repeat 2nd page, then 1st page, but if the number of sheets is 3, the third and final page is copied and immediately ejected, the second page is copied and sent to the staff car.

This is because the paper is fed from the 8 stacker, the first page is copied, and the paper is ejected, and the operation on the main body side is determined by even and odd numbers. In this operation, the main body control unit 201
When there is no document being processed on the platen glass 36, the paper feed belt 20. The rotational speed of the main motor 100 that drives the conveyance roller 38 on the forward path 35 and the conveyance belt 41 on the platen glass is controlled to be higher than that during synchronous exposure.

Furthermore, when starting in the single-sided copy mode for a double-sided original, ■- After stopping the original fed onto the three surfaces of the seismic platen glass, ■ reversing the transport belt 41 and sending the original to the reversing path 37.

The original is turned over in a somersault shape, and the final page is exposed on the platen glass 36 by the fixed optical system 54. After the exposure is completed, the conveyor belt 41 is reversed again, the original is passed through the reversing path 37 again, the page order is corrected, the other page side is exposed on the platen glass 36, and the original is transferred to the original stacker 3. Put this back ~
Repeating the operation in (2), in this case the copying machine main unit ejects paper after each page is copied. This completes the single-sided copying of the double-sided original. In this case, 1 main body control unit 201
When copying even-numbered pages of a double-sided original (the side facing down on the original stamper), move from the original stacker 3 to the forward path 3.
5 to the platen glass 36 unexposed, from the platen glass 36 to the reversing path 37, and the time until the leading edge of the original kicks the synchronization sensor 85 provided in the middle of the forward path 35, and the processed original is transferred from the platen glass 36 to the reversing path. 37 to the platen glass 36 without exposure.

During the time until the paper is ejected from the platen glass 36 to the document stacker 3 through the paper ejection path, the paper feed belt 20. The rotational speed of the main motor 100 that drives the conveyance roller 38° on the forward path 35, the conveyance roller 39, 40 on the reverse path 37, and the conveyance belt 41 on the platen glass 36 is controlled to be higher than the synchronous exposure speed. However, odd-numbered pages are controlled in the same way as single-sided copying of a single-sided original.

Furthermore, when starting in the double-sided copy mode for a single-sided original, when the above-mentioned item (■) is activated, the original is returned to the original stacker 3 without being exposed, and only the even-numbered pages are copied in the - cycle, and the odd-numbered pages are copied in the second cycle. , it goes without saying that the 9-inversion operation is not necessary when copying this odd-numbered page. Of course, on the copying machine main body 1 side, even-numbered pages of copy paper are fed into the stacker, and odd-numbered pages are fed from the stacker.The main body control unit 201 controls the above-mentioned double-sided original in the same way as when making a single-sided copy. .

〔Effect of the invention〕

As explained above, the present invention provides a document transport device that feeds documents stacked on a document stacker one by one to a processing section, processes the documents while moving them in the processing section, and discharges the documents. This is because the present invention is characterized in that it includes a control means that makes the document conveyance speed faster than the document conveyance speed during at least part of the time when there is no document being processed.

All or part of the time other than the time of exposing the original can be shortened. Therefore, the present invention has an excellent effect in that it is possible to improve the efficiency of copying work, especially for nine-sided originals.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a front sectional view of the main body of the document conveying device, Fig. 2 is a perspective view showing the document stacker and paper feeding mechanism, and Fig. 3 is a gate member holding the document on the stacker. Explanatory diagram showing the deformed state of the inserted original, Figure 4A
, B is an explanatory diagram showing the operating state of the gate member, FIG. 5 is a partially cutaway front view of the spring clutch provided on the stop roller shaft, FIG. 6 is a side sectional view of the same, and FIG. 7 is the downward rotation of the half-moon roller. A perspective view of the control mechanism, Figures 8A and B are explanatory diagrams of the operating state of the same rotation control mechanism, Figures 9A and B are explanatory diagrams of the operating state of the extrusion belt (half-moon roller), and Figure 10 is an illustration of the operating state of the extrusion belt (half-moon roller). FIG. 11 is a perspective view of the drive system of the belt, FIG. 11 is a perspective view of the operating mechanism of the document stopper, FIG. 12 is a perspective view of the rear side of the document stacker,
FIG. 13 is a perspective view schematically showing the drive mechanism of the paper ejection belt and rear end regulating plate, FIG. 14 is an explanatory diagram of the control system of the document conveying device, and FIG. 15 is the configuration of the main body of the copying machine and its control. It is an explanatory diagram of a system. - Copying machine main body 2 - Original transport device 3 - Original stacker 36 - Platen glass 100 - Main motor (DC motor used) 201
- Control means patent Applicant Konishiroku Photo Industry Co., Ltd. Figure 2 Figure 3 Figure 4 (A) (B) Figure 5 Figure 6 Figure 7 Figure 8 (B) Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 15, 201

Claims (2)

[Claims] (1) In a document transport device that can feed documents stacked on a document stacker one by one to a processing section, process the documents while moving them in the processing section, and eject the documents, the document being processed is transferred to the processing section. 1. A document conveying device comprising: a control means for making a document conveying speed faster during at least part of the non-existing time than the document conveying speed during processing. (2) the time required for the control by the control means to send the document from the document stacker to the processing section through the forward path;
The document conveying device according to claim 1, wherein the time taken from the processing section to feed the document through the reversing path to the processing section again is all or part of the time taken from the processing section until the document is discharged to the document stacker.