JPH0977389A - Document circulation transport device - Google Patents

Abstract

(57) An object of the present invention is to make the separating function operate properly without complicating the structure and to prevent problems such as paper feeding lack and stack feeding due to defective separation. A document circulating and conveying device is provided. SOLUTION: An original document separating means for separating the original documents placed on the original document placing part by a blowing action, and an original document separated by the original document separating means are fed to an exposure position and then placed on the original document placing part. Detects the original transport means for returning the document, the document partition plate that is set on the document stack placed on the document stacking unit, and detects the circulation of the document once, and the setting operation of the document partition plate on the document stack. In a document circulating / conveying apparatus having a partition member setting operation detecting section, a document partition plate height sensor S14 for detecting the document height by detecting the operating position of the partition member set on the document bundle. An air volume control means for controlling the air volume (blower motor rotation speed) of the document separating means based on the detection result of the document partition plate height sensor S14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document placed on a document placing portion, which is separated by a blowing action and fed one by one, and is discharged from the exposure position after the completion of exposure to the document placing portion. The present invention relates to a document circulating / conveying device such as a copying machine that is returned.

[0002]

2. Description of the Related Art In a conventional document circulating / conveying apparatus of this type, the separating function does not work properly depending on the type (thickness, size) and the number of documents in a document stack placed on a document placing section. Therefore, problems such as lack of paper feed and stack feeding have occurred due to poor separation. To deal with this bug,
Each time the original is fed, it is counted by the counting means, and it is determined whether the count value when the circulation of the original is detected by the partition member set on the original stack is larger or smaller than the set value. In some cases, the air flow rate for document separation is controlled based on the determination result.

[0003]

However, in such a conventional document circulating / conveying apparatus, the above-mentioned problem occurs when the number of documents is first counted. or,
However, instead of counting the number of originals, if a means for detecting the height of the original bundle is newly provided before the operation of feeding the originals, the structure becomes complicated.

The present invention provides a document circulating / conveying device in which the separating function works properly without complicating the structure, and problems such as lack of paper feed and stack feeding due to defective separation do not occur. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION According to the present invention, an original document placing portion for placing a bundle of original documents, and an original document separating device for separating the original documents placed on the original document placing portion into individual sheets by a blowing action. The document separated by the document separating means is fed to the exposure position, and is discharged from the exposure position after the exposure is finished and is returned to the document placing section, and the document is set on the document stack placed on the document placing section. A partition member for detecting the circulation of the original document, a partition member driving unit for driving the partition member to set it on the original stack, and a partition member setting operation for detecting the setting operation of the partition member on the original stack. An operation of the partition member in a state of being set on a stack of originals in a document circulating / conveying device including a detection unit and a document conveyance control device that controls a document conveyance unit based on a detection result of the partition member setting operation detection unit. Check position With the document height detection unit detecting the height of the document, and air volume control means for controlling the air volume of the document separating means based on a detection result of the document height detection unit and.

[0006]

1 is a block diagram showing an embodiment of a document circulating / conveying apparatus according to the present invention. In FIG.
Reference numeral 10 denotes a document circulating / conveying device that feeds a document placed on a document placing portion, which will be described later, for exposure and returns the document to the document placing portion after the exposure is completed. It is a contact glass for doing.

Reference numeral 11 denotes a document placing portion for placing a document bundle M (to be referred to as individual documents hereinafter also denoted by M) to be described later and automatically feeding the document. Reference numeral 12 denotes a rear end of the document bundle M. End plates 13 to be stopped are side guides for aligning and guiding both ends of the document stack M. S1 is a document presence / absence sensor, which detects the presence / absence of a document M on the document placing section 11. Reference numeral 14 denotes a document separating section to be described later for separating the document sheets M one by one, 30 is a document partitioning plate to be described later, and S2 is a document partitioning plate 30 set on the document placing section 11 and the document M is A partition plate set sensor for detecting that the document M has run out, and 40 is a paper feed belt described below for feeding the document M from the document placing section 11. Reference numeral 15 is a paper feed roller, which is used for contacting the document M fed by the paper feed belt 40 with the contact glass 5
Feed paper toward 0. 16a and 16b are intermediate conveying rollers, S3
Is an entrance sensor that detects the feeding of the document M, S4 and S5 are first and second transport sensors that detect the document M at each transport position, and S6 is a registration sensor. The original M that has passed these portions is fed onto the contact glass 50 by the conveyor belt 17 and exposed.

Reference numeral 18 is a reverse entrance roller, 19 is a switchback roller, S7 and S8 are first and second reverse sensors for detecting the original M at each position of the reverse path, 20 is a reverse discharge roller, and 21 is a discharge paper. Roller and S9 are paper ejection sensors. Exposed original M
The sheet is discharged onto the document M in the document placing section 11 by the sheet discharge roller 21 through a reverse path including the reverse inlet roller 18, the switchback roller 19, and the reverse sheet discharge roller 20.

Reference numeral 22 denotes an entrance gate claw which is operated when the document M is manually inserted, and S10 detects the document M at this time S.
ADF (semi-automatic paper feed) sensor, 23 is right turn roller, 24
Is a registration gate claw, 25 is a SADF branching claw for switching the document M between automatic paper ejection and semi-automatic paper ejection, 26 is a double-sided branch claw, 27
Is a SADF paper ejection roller, S11 is a SADF paper ejection sensor, S12 is a partition plate return position sensor, which will be described later, S13 is a document size sensor, and SW is a reversing unit cover switch.

FIG. 2 is a perspective view showing the document partition plate 30 and its drive section, and FIG. 3 is an operation explanatory view of the document partition plate 30. In FIGS. 2 and 3, 30 is a document partition plate (partition member)
So, normally, the partition plate solenoid (partition member drive part) 31
Is turned on, and as shown by the solid line in FIG. 3, the springs 32 and 33 move the rail 34 to the return position on the left side in the figure to raise the leading end of the document stack M (not shown). It can be placed on the placing section 11. Reference numeral 35 is a magnet that holds the document partition plate 30 at the return position, and S12 is a partition plate return position sensor that detects that the document partition plate 30 is at its raised position. When the document stack M is placed on the document stacking section 11 and a start key (not shown) is turned on, the partition plate solenoid 31 is turned off to resist the springs 32 and 33 so as to press the document stack M against the upper surface thereof. And moves to the right in the figure along the rail 34, and after the state shown by the chain double-dashed line in FIG. 3, the tip portion is naturally lowered to the state shown by the broken line. S2 is the partition plate setting sensor described above, which together with the partition plate return position sensor S12 forms a partition member setting operation detecting section. When the originals M are sequentially fed while the original partition plate 30 is pressed against the original stack M placed on the original placing portion 11, the original partition plate 30 is moved to the highest position when the original stack M makes one cycle. The lower level is reached and the partition plate set sensor S2 detects this.

Reference numeral S14 denotes a document partition plate height sensor (document height detection unit), which includes a light emitting unit and a document partition plate 30 by the light.
And a received light amount detection unit that detects the light amount of the reflected light reflected from the reflection part A. The detection value detected by the document partition plate height sensor S14 is converted into document partition plate height data (a value relating to the height of the document stack M) by an ADF control unit 60 described later. As described above, the height of the document stack M can be detected prior to the sheet feeding without complicating the configuration only by additionally installing the document partition plate height sensor S14.

FIG. 4 is a simplified sectional view of the document separating section 14, and FIG. 5 is a plan view of the document separating section 14. 40 in FIGS.
Is a paper feed belt, which has a belt vacuum hole 41,
It is driven by the paper feed belt drive roller 42, and the leading end side of the document stack M on the document placing portion 11 is placed thereon, and the lowermost original M is fed sequentially. 43 is a feed belt auxiliary roller. Reference numeral 44 denotes a vacuum duct, which is provided with a vacuum window 45, is blown by an intake blower (not shown) and is actuated to suck air, and sucks the document M through the belt vacuum hole 41 and sucks the document M onto the sheet feeding belt 40. A separation air duct 46 is provided with an air nozzle 47 directed toward the leading end of the document M at the bottom, and is blown by a blower (not shown) to blow air to blow air to the leading end of the document M. On the other hand, the vacuum duct 44 has its upper surface bent in the vicinity of the vacuum window 45 facing the leading end of the document stack M, and bends and guides the paper feed belt 40. Paper feed belt 4 as a whole
Apart from 0, the lowermost original M receives a large amount of air blown out from the air nozzle 47, and the original M is separated sheet by sheet.

FIG. 6 is a block diagram of a control circuit of the document circulating / conveying apparatus. In FIG. 6, 60 is ADF (automatic paper feed)
A control plate (ADF control unit) 61 is a main control plate (main control unit) that controls basic operations such as feeding and discharging, and 62 is a harness relay plate. The ADF control plate 60 serves as a document feeding control device that controls the document feeding means based on the detection results of the partition plate set sensor S2 and the partition plate return position sensor S12 (partitioning member detection unit). BM is a blower motor that introduces intake air to the vacuum duct 44, and drives the intake blower and the blower blower coaxially. Reference numeral 63 is a blower motor control plate (blower motor control unit). DC
Is a DC power supply, M1 is a feed motor, M2 is a feed motor, M3 is a reverse motor, SOLa is a feed solenoid, SOLb is a double-sided branch solenoid, SOLc is a SADF branch solenoid, SOLd is a shutter solenoid, SOLe is an inlet gate solenoid, S
OLf is a resist gate solenoid, SWa is a lift switch, and 64 is a display board.

The blower motor control unit 63 is an ADF control unit.
60 to 3 bit digital output signal (SPD3 SPD2 SPD
1) receives and controls the speed of the blower motor BM. FIG. 7 is a diagram showing the correspondence between the digital output signal and the rotation speed of the blower motor BM. In FIG. 7, L is a low level bit signal, H
Indicates a high level bit signal. Figure 8 shows blower motor BM
6 is a flowchart showing the rotation speed control of the ADF control unit 60.

When the document stack M is placed on the document stacking section 11 and a start key (not shown) is turned on, the partition plate solenoid 31 is turned off and the document partition plate 30 is lowered and pushed onto the upper surface of the document stack M. Applied. The document partition plate height sensor S14 detects the light amount of the reflected light reflected from the document partition plate 30 prior to feeding the document M, and the detected value is detected by the ADF control unit 60 as the document partition plate height (document stack M Height) data is converted (S1). If the partition sensor S12 is on (S
2) Return to the main routine (not shown). When the partition plate return sensor S12 is off and the document partition plate height is less than the height level value 40 (S3), the rotation speed of the blower motor BM is set to 3000 rpm (S4), and the process returns to the main routine. . Similarly, if 40 or more and less than 80 (S5), 3500 rpm (S6), 80 or more 1
When less than 20, (S7), 4000 rpm (S8),
When 120 or more and less than 160 (S9), 4500r
pm (S10), when 160 or more and less than 200 (S
11) 5000 rpm (S12), 240 over 200
If less than (S13), to 6000 rpm (S14), 2
When it is 40 or more (S13), 7000 rpm (S1
5), each is set and returns to the main routine.
The ADF control unit 60 serves as the above-described document feeding control device, and controls the air flow rate of the document separating unit 14 based on the detection result of the document partition plate height sensor S14 (document height detecting unit). Make a means.

Thus, the blower motor BM is set at each rotation speed in correspondence with the document partition plate height data, so that the document M can be reliably separated at the height of the document stack M with an appropriate air volume. It will be possible. Therefore, problems such as paper feeding failure and stack feeding due to poor separation do not occur.

[0017]

According to the present invention, since the height of the original is detected by detecting the operating position of the partition member set on the original stack of the original placing portion, the structure is not complicated. Since the air volume of the document separating means for separating the documents in the document stacking section one by one is controlled based on the detection result, the air volume for separation is determined according to the height of the document stack. By setting in advance properly, it becomes possible to reliably separate the originals with an appropriate air volume at the height of the original stack, and problems such as paper feeding failure and stack feeding may occur due to poor separation. Disappear.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a document circulating / conveying apparatus according to the present invention.

FIG. 2 is a perspective view showing a document partition plate and a drive unit thereof.

FIG. 3 is an operation explanatory diagram of a document partition plate.

FIG. 4 is a simplified cross-sectional view of a document separating portion.

FIG. 5 is a plan view of a document separating section.

FIG. 6 is a block diagram of a control circuit of the document circulating / conveying apparatus.

FIG. 7 is a diagram showing a correspondence between a digital output signal and a rotation speed of a blower motor.

FIG. 8 is a flowchart showing a rotation speed control of a blower motor.

[Explanation of symbols]

10 Document Circulation Conveying Device 11 Document Placement Part 12 End Plate 13 Side Guide 14 Document Separation Part 15 Paper Feed Rollers 16a, 16b Intermediate Conveying Roller 17 Conveying Belt 18 Reversing Inlet Roller 19 Switchback Roller 20 Reversing Discharging Roller 21 Discharging Roller 22 Entrance gate claw 23 Right turn roller 24 Registration gate claw 25 SADF branching claw 26 Double-sided branching claw 27 SADF paper ejection roller 30 Original partition plate 31 Partition plate solenoid (partitioning member drive part) 32, 33 Spring 34 Rail 35 Magnet 40 Paper feeding Belt 41 Belt vacuum hole 42 Feed belt drive roller 43 Feed belt auxiliary roller 44 Vacuum duct 45 Vacuum window 46 Separation air duct 47 Air nozzle 50 Contact glass 60 ADF control plate (ADF control part) 61 Main control plate (main control part) 62 Harness relay plate 63 Blower motor control plate (Blower motor control unit) 64 Table Display plate M Document stack (original) S1 Document presence / absence sensor S2 Partition plate set sensor (partitioning member setting operation detection unit) S3 Entrance sensor S4 1st transport sensor S5 2nd transport sensor S6 Registration sensor S7 1st reversing sensor S8 1st 2 Reversing sensor S9 Paper ejection sensor S10 SADF sensor S11 SADF Paper ejection sensor S12 Partition plate return position sensor (partitioning member set movement detection part) S13 Original size sensor S14 Original partition plate height sensor (original height detection part) BM Blower Motor SW Reverse cover switch DC DC power supply M1 Feed motor M2 Feed motor M3 Reverse motor SOLa Feed solenoid SOLb Double side branch solenoid SOLc SADF Branch solenoid SOLd Shatter solenoid Sole Inlet gate solenoid SOLf Registration gate solenoid SWa Lift switch

Claims (1)

[Claims] 1. A document placing section for placing a stack of documents, a document separating means for separating the documents placed on the document placing section by sheet by a blowing action, and a document separated by the document separating means. Is conveyed to the exposure position, and is discharged from the exposure position after the exposure is finished and is returned to the document placing part, and it is detected that the document is circulated once set on the document stack placed on the document placing part. Partition member, a partition member driving unit that drives the partition member to set it on the original stack, a partition member setting operation detection unit that detects the setting operation of the partition member on the original stack, and a partition member setting operation In a document circulating / conveying device equipped with a document conveying control device for controlling a document conveying means based on the detection result of a detecting section, the moving position of the partition member in the state of being set on a document stack is detected to detect the document height. Detect Document height detector,
A document circulating / conveying apparatus, comprising: an air volume control unit that controls an air volume of the document separating unit based on a detection result of the document height detecting unit.