JPS6247774B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device for manuscripts, paper, etc., which feeds sheets one by one by pressing a separation roller against a paper feeding member such as a paper feeding roller, and its object is to The purpose is to prevent local wear of the separation roller for preventing double feeding.

In conventional paper feeding devices, a separating roller that is in pressure contact with the paper feeding roller to prevent double feeding is constantly slowly rotated in the opposite direction to the paper feeding roller to prevent local wear of the separating roller. Rotation requires a large reduction ratio, which requires a mechanism, which has the drawback of making the structure complex and expensive.

The present invention utilizes the fact that the separating roller moves up and down (separating and pressing) depending on the thickness of the paper passing through it during paper feeding, and moves the lever attached to the shaft of the separating roller via a one-way clutch in the forward and reverse directions. sway to
By rotating the separating roller little by little in reverse through a one-way clutch, the mechanism is simplified and the drawbacks of the conventional mechanism are eliminated.

Next, embodiments of the present invention will be described in detail with reference to the attached FIGS. 1 to 13. In Figure 1, A
1 is an embodiment of the present invention, which is configured to be removably placed on the contact glass B ₁ of a well-known copying machine B, and A ₁ and A ₂ are stacked originals placed side by side at a predetermined interval. It is an automatic paper feeder, and has two master units A ₃ and A ₄ installed side by side, each of which contains an endless film with multiple titles written on it. Next, the stacked document automatic feeder will be explained. In Figure 2, 1 is the guide frame 1 on both sides.
Documents such as handprints are piled up on a document placing table having a structure. There is a through hole 1b in the middle part of the bottom surface, and the upper part of the auxiliary roller 2 protrudes slightly, and a pressing roller 5 whose upper end is pivotally connected to the tip of an arm 4 whose upper end is pivotally connected to the frame 3 is attached to the upper part by its own weight. It is placed.
Reference numeral 6 denotes an actuator for detecting a document, which is pivoted in the middle, and the right end projects above the through hole 1b when there is no deposited document, and the left end light shielding piece 6a descends to block light between the photo sensors 7. It's becoming like that.
A paper feeding member, for example, a paper feeding roller 8, is disposed at the bottom of the tip of the document table 1, and a separating roller 9, for example, a paper feeding roller 8, is disposed above the feeding roller 9, and a separation roller 9 is disposed above the feeding roller 9 to prevent double document feeding. A document guide 10 with a small coefficient of friction is provided, and the tip of a document holding arm 11 rotatably supported by the shaft of the pressing roller 5 is located near the tip of the document guide 10 to prevent the tip of the document from lifting due to curling or the like. are doing. 12 is a clutch mechanism for driving the paper feed roller 8. Two paper feed rollers 8
is attached to the rotating shaft 13 together with a spring clutch 14 as shown in FIGS.
Clutch lever 16 rotates only when solenoid 15 of No. 4 turns on, and spring clutch 14
The sleeve 14a of the rotary shaft 13 is engaged with the sleeve 14a of the rotary shaft 13, and is free with respect to the rotating shaft 13. Since its configuration is well known, the explanation will be omitted. Two sets of auxiliary rollers 2 are rotatably pivotally connected to a fixed shaft 17, and are connected to a paper feed roller 8.
are interlocked with each other by a belt 16, and are configured to rotate as a result of the rotation of the paper feed roller 8.

As shown in FIG. 5, the separation roller 9 for preventing double feeding is pressed forward at an angle θ to the vertical line of the center of the rotating shaft 13 of each paper feed roller 8, and its shaft 9a
is fitted into the long groove 18 of the frame 3, and can be moved up and down in the direction of the arrow, that is, separated from and pressed against the paper feed roller 8. A lever is connected to the end of the shaft 9a via a one-way clutch (not shown). 19 is provided, and is pulled counterclockwise by a spring 20, and an upper slope 19 which is a guided portion of the lever 19 is provided.
a is in contact with a guide member fixed to the main body, that is, the frame 3, for example, a guide pin 21. Therefore, when the document is fed between the paper feed roller 8 and the separation roller 9, the separation roller 9 slightly rises in the direction of the arrow in the long groove 18, and the guided portion, for example, the upper slope 19
a moves along the guide pin 21 and lever 19
rotates slightly counterclockwise. At this time, the separation roller 9 does not rotate due to the one-way clutch. When the document passes, the separation roller 9 is lowered by the thickness of the document, and at this time, the lever 19 rotates clockwise due to the contact between the upper slope 19a and the guide pin 21, and the separation roller 9 is also held together by the one-way clutch. and rotates clockwise. Therefore, the separation roller 9 rotates slightly clockwise each time a document passes, and the outer periphery of the separation roller 9, which is made of a rubber elastic material, is not locally worn and its durability is improved.

FIG. 6 shows another embodiment of the separation roller, in which the shaft 22a of the separation roller 22 is pivotally connected to the tip of an L-shaped link 24 whose intermediate portion is pivotally connected by a pivot pin 23, and the link 24 is supported by a spring 25. The tension separation roller 22 is pressed against the paper feed roller 8 in the counterclockwise direction.
A lever 26 is provided on the shaft 22a of the separation roller 22 via a one-way clutch (not shown), and a guided portion, for example, a diagonal groove 26a upward to the left, is formed in the upper part of the lever 26, and a guide fixed to the main body, that is, the frame 3, is formed. A member, for example a guide pin 27, is fitted therein. Therefore, the document is transferred to the paper feed roller 8 and separation roller 22.
When the separation roller 22 is fed in between, the separation roller 22 rises slightly,
The lever 26 also rises, and the diagonal groove 26a contacts the guide pin 27 and rotates slightly counterclockwise. At this time, the separation roller 22 does not rotate due to the one-way clutch. When the document passes, the separation roller 22 is lowered by the thickness of the document, and at this time the lever 26 is rotated clockwise, and the separation roller 22 is also rotated clockwise together by the one-way clutch. Therefore, the separation roller 22 rotates slightly clockwise each time the document passes, and local wear on the outer periphery of the separation roller 22 can be prevented.

FIG. 7 shows a device that simultaneously adjusts the widths of each pair of guide frames 1a of the above-mentioned two sets of document mounting tables 1, and the right and left sides of the two sets of guide frames 1a are adjusted with racks 28, 2.
9, and is engaged with a pinion 30 that is pivotally connected to a shaft fixed at the center of both document mounting tables 1. Therefore, when the width of the pair of guide frames 1a is adjusted by sliding one of the guide frames 1a of one of the two document placement tables 1, the width of the pair of guide frames 1a is adjusted.
The pair of guide frames 1a are also automatically adjusted to have similar widths. The aforementioned paper feed roller 8
Conveyance rollers 31 and 32 are disposed in front of the conveyance rollers 31 and 32, and a turn roller 33 is disposed in front of the conveyance rollers 31 and 32. A photo sensor 3 is disposed on the side of the conveyance path in front of the turn roller 33.
4, a jam detection sensor 36 is provided at the middle side of the guide plate 35 of the turn roller 33. An endless belt 37 is disposed following the turn roller 33, a driving roller 38 is disposed in front, and one end of a document stopper 39 is pivotally attached to the lower part of the tip, and when the solenoid is turned on, the tip rises and reaches the endless belt 37. They are starting to touch each other. 40, 41, 42, 43 are paper ejection rollers, 44
is a paper ejection tray and 45 is a paper ejection guide.

Next, the master unit shown in FIGS. 8 to 12 will be explained. 50 is a box-shaped case,
A transparent plate 51 is fixed to the bottom. 5
2 is an endless master film, and the inside has various titles 52a corresponding to multiple types of slips.
are sequentially printed in the rotational direction, transparent portions 52b are formed in the portions of the slip where variation information is required, and other portions are printed in white. Guide rollers 53, 54, 55, and 56 are disposed at the four internal corners of the case 50, and a drive shaft 57 is inserted into the vertical guide groove 75a of the side plate 75 from above from above the master film 52 stretched on the guide rollers. A pressure roller 58 is fitted into the horizontal guide groove 75b of the side plate 75, which is fitted and held in place by the split pin 49, and is fixed in place with a screw to press the master film 52. A tension spring 59 is attached to the tension spring 59. 60 is a motor fixed to the side plate 75, a gear 61 on the motor output shaft and a gear 62 on the drive shaft 57 mesh with each other, and a brake drum 63 is fixed on the motor shaft protruding on the opposite side from the motor output shaft. A brake band 64 is stretched around the outer periphery with a spring 65. A stopper angle 66 is provided near the guide roller 55, and the end surface of the master film 52 comes into contact with it to prevent it from bending inward. Downstream is a photo sensor 6
7 is arranged so that a mark 52c for determining the stop position formed at one end of the master film 52 passes through. The mark 52c has two or three lengths, and determines the home position (start position) and the reset position for skipping unnecessary titles 52a. Detection of this reset position by the photo sensor 67 can be arbitrarily selected using a changeover switch or the like. Reference numeral 70 denotes a display sheet displaying fluctuation information. A thin display film made of white vinyl chloride or the like is laminated on the information writing side of a rectangular substrate made of magnetic rubber. The sheet is inserted through the upper insertion hole 50d of the case 50, and is inserted into the guide groove 71. It is bent horizontally along the lower curved guide 72 and is located above the master film 52 between the guide rollers 55 and 56. At the top of this horizontally bent display sheet, a holding plate 73 made of magnetic material is fixed to a side plate 75, so that the horizontal part of the display sheet 70 is attracted to the holding plate 73 by its magnetic force.
It is designed so that it does not come into contact with the master film 52. 74 is a connector for electrical system connection.

Next, the effect will be explained. Copy machine B power supply
When ON, the master films 52 of the two unit masters A ₃ and A ₄ stop at the home position, and the first title 52a is displayed on the transparent plate 5 of the case 50.
1 is located at the top. Further, the solenoid 15 of the clutch mechanism 12 is turned on, and the paper feed roller 8 and the rotating shaft 13 are free. On the other hand, various handprints are piled up one after another from below on the document mounting tables 1 of the two sets of automatic document feeders A ₁ and A ₂ . Further, a display sheet 70 containing fluctuation information is inserted through the insertion hole 50d of the case 50. Next, when the print button of copying machine B is turned on, the motors (not shown) of the automatic document feeders A ₁ and A ₂ rotate, and the solenoid 15 is turned off at a predetermined timing, so that the paper feed roller 8 The auxiliary roller 2 rotates, and the auxiliary roller 2 reliably feeds the lowest document between the paper feed roller 8 and the separation roller 9. Each time a document passes through this space, double feeding is prevented, and
The separation roller 9 rotates slightly counterclockwise, renewing its contact with the paper feed roller 8 and preventing local wear. For example, 50 originals will rotate about 1/4 of a turn. Next, when the tip is bitten by the conveyance rollers 31 and 32 and reaches the position of the photo sensor 34, the solenoid 15 is activated by the detection signal from the photo sensor.
Since this is set to ON, feeding of the next original will be stopped. Since everything other than the feed roller 8 and the auxiliary roller 2 rotates in conjunction with the motor, the original is then conveyed by the turn roller 33 and the endless belt 37, and placed on the contact glass B ₁ of the copying machine B with the original display side facing down. When the document is placed and comes in front of the stopper 39, the motor is turned off, and almost at the same time, the stopper 39 comes into contact with the endless belt 37 by turning on a solenoid (not shown), and the document hits the stopper 39 and stops. The endless belt 37 continued to move for a short while due to the inertia of the motor.
During this time, the skew in the manuscript is corrected. Next, exposure of copying machine B is started. When the first exposure is completed, the master film 52 is advanced to the next title 52a and stopped, and exposure is performed. In this way, various titles 52a are copied to a specific document, and several types of necessary slips are automatically copied. During this time, when copying a slip that requires fluctuation information, the transparent portion 52b of the master film 52 is positioned on the horizontal portion of the display sheet 70, and the display sheet 70
When copying a slip that does not require variation information, the white part of the master film 52 is positioned in the horizontal part of the display sheet 70, so that the variation information is not copied. At this time, the master film 52 does not come into contact with the horizontal portion of the display sheet 70. When the desired number of copies have been completed, the master film 52 is reset and returns to the home position, the solenoid of the stopper 39 is de-energized and released, and the motor is turned on.
The original is guided to a paper discharge guide 45 by paper discharge rollers 40 , 41 , 42 , and 43 and is discharged to a paper discharge tray 44 . Solenoid 15 operates in parallel with paper ejection.
Turn OFF, and repeat the above operation until there are no more originals left.

As shown in Fig. 13, the copies are reduced so that two sheets can fit into A5 size, and since there is a perforation in the center, this can be separated to make A6 size, which is the slip size.

When there are no originals left on the original platen 1, the upper end of the original detection actuator 6 rotates upward, blocking the photo sensor 7 and detecting the absence of originals.After the last original has been ejected, the entire original is removed. stop operating.

Also, if you are using two sets and only one side runs out of documents, the solenoid 15 of the clutch mechanism 12 on that side will remain ON due to detection by the actuator 6, and the paper feed roller 8 will not rotate, and the paper feed roller 8 will no longer rotate. The paper feed roller rotates only on one side and repeats a predetermined operation.
By controlling the paper feed rollers independently in this manner, wear of the paper feed roller 8 and separation roller 9 is prevented.

According to the present invention, in the paper feeding device which feeds one sheet by pressing the separation roller against the paper feeding member,
A lever is attached to the shaft to which the separating roller is fixed via a one-way clutch, and the guided portion of the lever is slidably pressed against a guide member fixed to the main body, and the guided portion is pressed against the guide member fixed to the main body. The lever is formed to swing in the forward and reverse directions as the separation roller separates from and presses against the paper feeding member each time the paper passes between the member and the separation roller. By swinging in the direction, the separation roller is rotated little by little in the opposite direction via the one-way clutch, which simplifies the low-speed rotation mechanism to prevent local wear of the separation roller. This has the advantage that it can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention installed in a copying machine, FIG. 2 is a partially cutaway front view of the automatic stacked document feeder shown in FIG. 1, and FIG. An enlarged front sectional view of the paper feed roller and auxiliary roller shown in the figure.
FIG. 4 is a perspective view of the paper feed roller section, FIG. 5 is a front view of the first embodiment of the separation roller section, FIG. 6 is a front view of the second embodiment of the separation roller section, and FIG. 7 is a front view of the separation roller section of the second embodiment. Figure 8 is a front sectional view of the master unit, Figure 9 is a side view of Figure 8, Figure 10 is a perspective view of the endless film used in the master unit, and Figure 11 is a display sheet. Front view, 1st
Figure 2 is a perspective view of the end of the endless film drive shaft.
FIG. 13 is a plan view of copy paper copied by the apparatus of the present invention. 8... Paper feeding member (paper feeding roller), 9... Separation roller, 9a... Shaft, 18... Long groove, 19... Lever, 19
a... Upper slope, 20... Spring, 21... Guide member (guide pin), 22... Separation roller, 22a
...Axis, 23...Pivot pin, 24...L-shaped link, 25
...Spring, 26...Lever, 27...Guide member (guide pin), 26a...Diagonal groove.

Claims (1)

[Scope of Claims] 1. In a paper feeding device that feeds sheets one by one by pressing separation rollers 9, 22 against the paper feeding member 8, a shaft 9a to which the separation rollers 9, 22 are fixed; 2
The levers 19 and 26 are connected to 2a via a one-way clutch.
The guided parts 19a, 26a of the lever are slidably pressed against the guide members 21, 27 fixed to the main body, and the guided parts are inserted between the paper feeding member 8 and the separation rollers 9, 22 during paper feeding. The levers 19 and 26 are formed so as to swing in the forward and reverse directions as the separation rollers 9 and 22 are separated from and pressed into contact with the paper feed member 8 each time the paper passes through. - A paper feeding device in which the separation rollers 9 and 22 are driven to rotate little by little in the opposite direction via the one-way clutch by swinging in the opposite direction.