JPS6219333B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device that separates and feeds a plurality of stacked sheets one by one, and particularly relates to a paper feeding device used in facsimile machines and copying machines.

For example, in facsimile machines, various types of paper feeding devices have been proposed for feeding multiple documents to be sent one by one to the reading section of the facsimile machine, one of which is the sheet feeding device. a separation roller that is rotationally driven in the sheet feeding direction; a feeding roller that is provided in a feeding path in front of the separation roller and that is rotationally driven in the sheet feeding direction; and a brake member that contacts the circumferential surface of the separation roller. including;
The feeding roller feeds the original to be transmitted between the separating roller and the brake member, and the brake member applies the original to the original to be transmitted, excluding the original closest to the separating roller among the originals to be transmitted. Therefore, there is known a paper feeding device configured to apply a braking action to prevent the document from passing, and to allow only the one document closest to the separation roller to pass through and be fed.

In the above-mentioned paper feeding device, if a paper jam occurs in the transmitted document held between the separating roller and the brake member, the relatively large friction between the transmitted document and the brake member will cause the paper jam to occur. A large amount of force is required to remove the transmitted document, and there is a risk that the transmitted document may be torn during removal.

Further, the brake member and the separation roller have a problem in that a predetermined coefficient of friction necessary for separating the sheets is impaired due to adhesion of paper dust and the like when separating the sheets.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in conventional paper feeding devices, and an object of the present invention is to provide an improved paper feeding device.

According to the present invention, the present invention provides a separating roller that is rotationally driven in the sheet feeding direction, and a feeding roller that is provided in a sheet feeding path in front of the separating roller and that is rotationally driven in the sheet feeding direction. and a brake plate movable between a brake application position where the brake plate contacts the circumferential surface of the separation roller, a brake non-application position where the brake plate is slightly separated from the separation roller, and a cleaning position where the brake plate is largely separated from the separation roller;
a drive device that drives the brake plate between the brake application position and the brake non-action position, and when cleaning the separation roller and the brake member, the brake member is moved to the cleaning position,
The drive is accomplished by a paper feeder configured to drive the brake member to the non-braking position in the event of a paper jam.

According to this configuration, when a paper jam occurs, the brake member is moved away from the separation roller to a non-braking position, so that the jammed sheet can be easily removed between the brake member and the separation roller. will be removed. Further, since the brake member can be separated from the separation roller by a large distance, cleaning of the brake member and removal of jammed sheets becomes easy.

The present invention will be described in detail below with reference to examples with reference to addition diagrams.

FIG. 1 is a perspective view of a facsimile machine equipped with a paper feeding device according to the present invention. The facsimile apparatus has a document placing table 1 of a paper feeding device in the front part, and the transmission documents placed on the document placing table 1 are fed into the apparatus one by one by the paper feeding device, Information is photoelectrically read when the document passes through a reading section 2 inside the device, and is then discharged from the document discharge port 3 to the outside of the device. The facsimile apparatus also has a recording paper stacker 4 for receiving received documents (recording paper). In FIG. 1, reference numeral 5 is an operation panel for controlling transmission and reception of the facsimile machine, and reference numeral 6 is a continuous automatic paper feeding button of the paper feeding device.

FIG. 2 is a side view showing the drive system of the paper feeding device according to the present invention. In FIG. 2, reference numeral 7 indicates an electric motor. The electric motor 7 has a rotating shaft 8 to which a sprocket 9 is fixed. An endless chain 10 is engaged with the sprocket 9, and this endless chain 10 is connected to the sprocket 9, a sprocket 12 fixedly supported on the roller drive shaft 11, and a shaft 17 fixedly planted on the side plate 28. It is spanned between the idle sprocket 18 which is rotatably supported, and is designed to constantly rotate in the direction of the arrow during sheet feeding operation. The reading section 2 is provided with two roller shafts 13 and 14, and each roller shaft is rotationally driven by a drive system of the facsimile body (not shown) via sprockets 15 and 16 fixed to the respective shafts. be done.

The roller shafts 13 and 14 are rollers 19 and 2, respectively.
These rollers 19 and 20 form a pair with rollers 23 and 24 attached to shafts 21 and 22, respectively, and when rotated counterclockwise in the figure, the transmitted document is moved to the right in the figure. It is designed to be transported in both directions. The original to be sent is exposed to the light source 25 while being transported as described above.
The transmission original is irradiated with a light beam emitted by the transmission original, and the light reflected on the original surface of the transmission original is detected by a light receiving element 26, whereby information on the transmission original is read photoelectrically. Further, the reading section 2 includes a photoelectric detector 27 for detecting passage of the transmitted original.
is provided.

3 to 19 show an embodiment of a paper feeder according to the present invention. As clearly shown in FIGS. 3, 8, and 9, the roller drive shaft 11 is connected to side plates 28,
It is rotatably supported by 29. A clutch 30 is provided on the roller drive shaft 11. This clutch 30 is connected to the roller drive shaft 1.
The disk cam 100 rotatably mounted on the drive shaft 11 is rotatably connected to the drive shaft 11,
It is integrated with the disk cam 100. Clutch 30 is
When one end of the lever 33 is engaged with the notch 32 provided in the clutch disk 31, the roller drive shaft 11 and the disk cam 100 are separated,
On the other hand, one end of the lever 33 is connected to the notch 3.
2, the roller drive shaft 11 and the disk cam 100 are connected as described above. The lever 33 is pivotally supported on a shaft 34 and connected at the other end to a plunger 36 of a first solenoid 35. When the first solenoid 35 is energized, the lever 33 is moved by the spring 37.
The spring 37 is rotated clockwise as seen in FIGS. 8 and 9 against the spring force to disengage it from the notch 32, whereas when the current is not energized, the spring 37
flexibly pressing one end of the lever 33 toward the circumferential surface of the clutch disk 31 by a spring force;
This moves it into a state where it can engage with the notch 32.

As clearly shown in FIGS. 3, 13, and 14, the roller drive shaft 11 is connected to the side plates 28, 29.
A sleeve 38 is rotatably supported between them.
A spring clutch 39 is provided between the sleeve 38 and the roller drive shaft 11.
The spring clutch 39 has a clutch sleeve 40 with ratchet teeth 41, and when a pawl 45 provided at one end of a lever 44 is engaged with one of the ratchet teeth 41, the clutch sleeve 40 rotation is prevented and the spring 42 does not wrap around the drive sleeve 43, thereby separating the roller drive shaft 11 and the sleeve 38, and the pawl 45 disengages from the engagement with the ratchet teeth 41; When the clutch sleeve 40 is allowed to freely rotate, the spring 42 wraps around the drive sleeve 43, thereby connecting the roller drive shaft 11 and the sleeve 38 to each other in a torque transmitting relationship. ing. The lever 44 is pivotally supported on a shaft 46 and is connected at the other end to a plunger 48 of a second solenoid 47. The second solenoid 47 moves the lever 44 to the thirteenth position when energized.
When viewed in the figure, the lever 44 is driven clockwise to disengage the pawl 45 from the ratchet tooth 41, whereas when the power is not energized, the lever 44 is driven counterclockwise to disengage the pawl 45 from the ratchet tooth 41. 41.

Further, another sleeve 50 is fitted around the outer periphery of the sleeve 38. A one-way clutch 51 is provided between the sleeves 38 and 50, and this one-way clutch 51 is connected to the sleeve 3.
8, only clockwise rotation as seen in FIG. 13 is transmitted to the sleeve 50, and when the sleeve 38 is at rest, the sleeve 50 is free to rotate in the clockwise direction as seen in FIG. I'm learning to forgive.

As best shown in FIGS. 3, 4, and 6, the sleeve 50 has a plurality of feed rollers 52, four in this embodiment, spaced apart from each other in the axial direction. It is held in a fixed state. Each of the paper feed rollers 52 passes through an opening 53 provided in the document mounting table 1, and a portion thereof passes through the opening 53 provided in the document mounting table 1.
It protrudes upward in the figure. The paper feed roller 52 may be made of rubber or a rubber-like product.

As shown in FIGS. 3 and 10 to 13, a separation roller drive shaft 54 is provided at a position on the advancing side of the roller drive shaft 11 in the document conveyance direction. The separation roller shaft 54 is rotatably supported by the side plates 28 and 29 below the document placement plate 1, and supports the sleeve 55 in a fixed state. Another sleeve 56 is fitted around the outer periphery of the sleeve 55, and a one-way clutch (not shown) is provided between this sleeve 56 and the sleeve 55. Similar to the one-way clutch 51, this one-way clutch transmits only the rotation of the sleeve 55 in the clockwise direction in FIG.
As seen in the figure, it is designed to allow free rotation in the clockwise direction. A sprocket 57 is integrally formed on the sleeve 55, and an endless chain 59 is stretched between the sprocket 57 and a sprocket 58 attached to the sleeve 38.

As best shown in FIGS. 3, 4, and 5, the sleeve 56 fixes a plurality of separating rollers 60, five in this embodiment, spaced apart from each other in the axial direction. It is being held in good condition. A portion of each of the separating rollers 60 projects upwardly in the drawing of the original placing table 1 through the opening 53 provided in the original placing table 1. The amount of protrusion may be approximately the same as that of the feeding roller 52, as shown in FIGS. 10 to 12.
Further, the separation roller 60 is made of rubber or a rubber-like product.

Further, on the document mounting table 1, FIGS. 4, 8,
As shown in FIG. 15, a guide member 61 is attached to prevent the transmitted original from entering below the original placing table 1. As shown in FIG.

As shown in FIGS. 3, 5, 8, and 10 to 12, the side plates 28 and 29 rotatably support a shaft 62 above the document table 1. The shaft 62 fixedly supports one end of a yoke-shaped support frame 64 by means of a screw 63.
One end of a polymer of a brake plate 65 and a leaf spring 66 made of a rubber material such as urethane rubber is attached to the other end of the support frame 64, and this polymer is attached to the brake plate at the other end. 65, it contacts the outer circumferential surface of the separating roller 60, and the other end and the circumferential surface of the separating roller 60 define a wedge-shaped space (see FIG. 15). In this embodiment, two brake plates 65 are provided, each in sliding contact with a corresponding separation roller 60. As shown in FIG. 15, a highly slippery layer 68 such as a fluorine resin layer is provided on the surface of the brake plate 65, except for the portion that contacts the separation roller 60. The brake plate 65 is flexibly pressed against the outer circumferential surface of the separating roller 60 by the leaf spring 66, and is also pressed against the outer circumferential surface of the separating roller 60 by a pressing rod 70 supported by a support case 69. It is flexibly pressed towards the surface. Pressing rod 70
is given a downward spring force in the figure by the spring force of a compression coil spring 73 provided between its flange portion 71 and a plug 72 screwed to the support case 69. This spring force is adjusted by adjusting the screwing amount of the plug 72.

Further, the support frame 64 has a stopper member 74 in front of the brake plate 65, in other words, at a position on the lag side in the document feeding direction. Stopper member 74
are provided on both outer sides of the brake plate 65, and their lower ends are located at the same position as the upper outer circumferential surface of the separation roller 60, or slightly below it, and are placed on the document mounting table 1. It is designed to allow only a few sheets of transmitted originals to pass through. Moreover, the shaft 6
2 has a guide piece 75 that prevents the transmitted original from being rolled up and guides the transmitted original to the reading section 2.

Further, a lever 7 is attached to one end of the shaft 62, as shown in FIGS. 3, 8, and 16 to 19.
6 is installed. The lever 76 is positioned between a pivoted position (braking position) as shown in FIGS. 8 and 18 and a pivoted position (cleaning position) as shown in FIGS. 16 and 17. It can be rotated in the two rotational positions described above by an elastic coil spring 79 installed between a pin 77 provided on the lever 76 and a pin 78 provided on the side plate 29. It is designed to be maintained in a stable state. The lever 76 is shown in FIGS.
When the support frame 64 is in the rotational position as shown in FIG. It is placed in the braking position where it is in contact with a surface. On the other hand, when the lever 76 is in the rotational position shown in FIGS. 16 and 17, the support frame 64 is flipped upward to the non-operating position, and the brake The plate 65 is located at a cleaning position far away from the circumferential surface of the separation roller 60. This cleaning position is used for cleaning and removing jammed transmission originals. The lever 76 also has an operating knob 80 at one end thereof. Further, the side plate 29 pivotally supports a lever 82 by means of a pin 81, as shown in FIGS. 18 and 19. The lever 82 is connected at one end to a plunger 84 of a solenoid 83, and when the solenoid 83 is not energized, the lever 82 is moved by the spring force of a telescopic coil spring 85 as shown in FIG. When the solenoid 83 is held at a position separated from the pin 81 and the solenoid 83 is energized, it rotates at a predetermined angle clockwise from the pin 81 as seen in FIG. degree, the other end engages with the operating knob 80 of the lever 76, the lever 76 is slightly lifted, and the shaft 62 is rotated counterclockwise as seen in FIG. 8 to remove the support. Lift up the frame 64 a little and remove the brake plate 6 supported by it.
5 is located at a brake non-applying position slightly separated from the separation roller 60. The solenoid 83 is energized when a paper jam is detected.

Also, Fig. 3, Fig. 8, Fig. 9, Fig. 10 to Fig. 1
As shown in FIG. 2, the side plates 28 and 29 rotatably support a shaft 86 above the document table 1 and at a position on the lag side of the shaft 62 in the document feeding direction. The shaft 86 engages a bracket 88 provided at one end of the presser plate 87 with an elongated hole 89 extending vertically in the figure, and swingably supports the presser plate 87. Further, the shaft 86 supports one end of a drive lever 90 in a fixed state with a screw 91. . The other end of the drive lever 90 engages in a hole 93 in an elastic bracket 92 provided near the other end of the holding plate 87. The presser plate 87 faces the paper feed roller 52, and its tip extends to the separation roller 60 and has a comb-teeth shape, of which the three comb-teeth 94 located in the center are Both sides of the brake plate 65 face the outer circumferential surface of the separation roller 60 on which the brake plate 65 is not in sliding contact (see FIG. 5).
Also, the comb teeth 95 on both outer sides are connected to the stopper member 7.
It is located on the outer side of 4. Further, the presser plate 87 is provided with a lever member 96 on its lower bottom surface along each of the comb teeth. The rail members 96 are located on both sides of the paper feed roller 52, as shown in FIG. Incidentally, as shown in FIG. 7, this lever member 96 may be formed integrally with the pressing plate 87 by press-molding the pressure plate 87. Further, the presser plate 87 has an inclined plate 97 on the one end side thereof.

The shaft 86 carries one end of a lever 98 at one end thereof, as best seen in FIGS. 3, 8 and 9. The lever 98 has a cam follower 99 at its other end, and the cam follower 99 is pressed against a disc cam 100 attached to the roller drive shaft 11 by the force of a spring 101. The spring 101 is connected to the lever 98
It is attached between a pin 102 attached to the side plate 28 and a pin 103 attached to the side plate 28.
The lever 33 is located in the notch 32 of the clutch disc 31.
When the cam follower 99 is engaged with the top portion 100a of the disk cam 100, as shown in FIG. It is held in the raised position as shown in the figure. On the other hand, when the lever 33 is disengaged from the notch 32 and the disk cam 100 follows the roller drive shaft 11 and rotates clockwise as seen in FIG. 100b, the shaft 86 is rotated clockwise as viewed in FIG. 9, and the presser plate 87 is lowered to the lowered position as shown in FIG. 11. . When the press plate 87 is in the lowered position as shown in FIG. 11, the press plate 87 contacts the upper circumferential surface of the separation roller 60 at the tip of the lever member 96. The disk cam 100 lowers the presser plate 87 to the lowered position as described above until the original to be transmitted, which is abutting against the stopper member 74 at its leading edge, is sandwiched between the separation roller 60 and the brake 65. It is designed to allow Specifically, the cam edge of the disc cam 100 is
If the height of the sent originals stacked on top of each other is high,
The presser plate 87 is configured to press the document bundle for a long time, and when the pressure is low, the presser plate 87 can press the document bundle for a short time. This short period of time is a period of time during which at least the last sheet of the document to be sent is fed until its leading edge is nipped between the separation roller 60 and the brake plate 65.

The paper feeding device constructed as described above operates as follows. When setting the transmission document D on the document table 1 before operating the continuous automatic paper feed button 6, the lever 33 engages with the notch 32 of the clutch disk 31, as shown in FIG. In addition, the cam follower 99 engages with the top portion 100a of the disk cam 100 to hold the presser plate 87 in the raised position as shown in FIGS. 10 and 12. Therefore, at this time, it is possible to pass a plurality of transmission documents D between the document placement table 1 and the presser plate 87 and place them on the document placement table 1 with their leading edges abutting the stopper member 74. .

When the continuous automatic paper feed button 6 is operated after the setting of the transmission document D as described above is completed, the first and second solenoids 35 and 47 are energized. When the first solenoid 35 is energized, the lever 33 rotates clockwise as viewed in FIG. As a result, the clutch 30 is engaged, and the rotation of the normally rotating roller drive shaft 11 is transmitted to the disc cam 100. As a result, the disk cam 100 rotates clockwise as seen in FIG. 9, and the cam follower 99 moves to the top portion 100a.
It comes to engage with the bottom portion 100b further apart. As a result, the presser plate 87 is momentarily lowered to the lowered position as shown in FIG. At this time, the presser plate 87 is pressed against the upper circumferential surface of the separation roller 60 with its comb tooth portion 94, and also presses the transmission document D against the feeding roller 52 at the rear end side.
When the number of originals to be sent on the original platen 1 decreases, the 6th
As shown in the figure, the presser plate 87 is attached to the feeding roller 5.
2, the portion that engages with the paper feed roller 52 is slightly raised from the upper circumferential surface of the paper feed roller 52, and each lever member 9
6 is located between the respective feeding rollers 52, and forms the transmitted document to make it strong, and also improves the strength of the transmitted document D.
Apply gentle pressure to the Furthermore, as described above, when the second solenoid 47 is energized,
The lever 44 rotates clockwise as seen in FIG.
The pawl 45 is disengaged from the ratchet teeth 41 provided on the clutch sleeve 40, the spring clutch 39 is engaged, and the rotation of the roller drive shaft 11 is transmitted to the sleeve 38. sleeve 3
The rotation of the clutch 51 and the sleeve 50 on the one hand
It is transmitted to the paper feed roller 52 via the sprocket 58, the endless chain 59, the sprocket 57, and the sleeves 55, 56 to the separation roller 60. Rotate. The paper feed roller 52 and separation roller 60, which rotate simultaneously, transport the transmission document D, which is pressed against it by the presser plate 87, to the right as seen in FIG. As a result, the transmitted document D collides with the stopper member 74 as shown in FIG. The distal edge thereof is inserted into the wedge-shaped space 67 defined by the plate 65. At this time, the leading edge of the transmitted document curls upward as shown in the figure.
This is prevented by the comb teeth portion 94 of the presser plate 87,
The leading edge of the transmitted document enters the inner part of the wedge-shaped space 67 correctly. Furthermore, even if the leading edge of the document to be transmitted moves diagonally upward in the wedge-shaped space 67, the leading edge collides with the highly slippery layer 68, and is guided by this to descend downward in the figure. You can now enter the inner part of the screen correctly.

Therefore, among the several sheets of transmission documents that have been fed into the wedge-shaped space 67, all documents other than the lowest transmission document are stopped at that position due to the friction between them and the brake plate 65, and the lowest transmission document As the separation roller 60 rotates, only the paper is conveyed to the right in the figure, and the roller 1 of the reading section 2 shown in FIG.
9 and 23, and is further conveyed to the right in the figure. It should be noted that when the transmitted document collides with the brake plate 65, the brake is applied to the transmitted document to temporarily stop it, albeit for a moment. At this time, if the document to be transmitted is continuously forcibly fed out by the feeding roller 52 with a strong feeding force, wrinkles will occur in the document to be transmitted, especially when there are few documents D to be transmitted on the document tray 1. As shown in FIG. 6, the presser plate 87 lightly presses the original to be sent against the feeding roller 52 in a slightly raised state.
The feeding roller 52 does not act to forcibly send out the original to be transmitted, so even if the original to be transmitted collides with the brake plate and is temporarily stopped as described above, the original to be transmitted will not be wrinkled. Furthermore, when the leading edge of the transmitted document is caught between the separation roller 60 and the brake 65 and is conveyed by the separation roller 60,
The shaft 86 is rotated counterclockwise in FIG. 9 by the disk cam 100, which continues to rotate, and the holding plate 87 is moved from the lowered position shown in FIG. 11 to the lower position shown in FIG. The document to be sent will now be raised to the raised position as shown in
The pressure towards 2 will be released.
In this embodiment, the presser plate 87 in the lowered position is lifted in the following manner. That is, when the shaft 86 rotates counterclockwise as seen in FIG. 11, the lever 90 rotates accordingly, and the entire presser plate 87 rotates counterclockwise around the shaft 86. It is lifted away from the separation roller 60. Then, the tip of the presser plate 87 comes into contact with the lower edge of the frame 64. This time, the presser plate 87 rotates clockwise as seen in FIG. As shown in FIG. 12, it appears to be lifted horizontally upwards in the figure.

The leading edge of the separated sheet of transmission document passes through the detector 27 of the reading unit 2, and when this is detected by the detector 27, the drive to the rollers 19 and 20 (see Figure 2) is stopped. Therefore, the transmitted document is temporarily stopped at that position, and at this time, the energization of the first and second solenoids 35 and 47 is also stopped. This causes the lever 44 to rotate counterclockwise as viewed in FIG. 13, so that the pawl 45 engages one of the ratchet teeth 41 on the clutch sleeve 40 and disengages the spring clutch 37. Also lever 3
3 rotates counterclockwise as viewed in FIG. When the preparations on the receiving side of the facsimile machine are completed, the driving of the rollers 19 and 20 is released, and they rotate counterclockwise as viewed in FIG. 2 again. As a result, rollers 19 and 2
0 rotates and conveys the transmission original to the right in the figure. At this time, the information of the transmitted document is photoelectrically read by the light source 25 and the light receiving element 26. Incidentally, at this time, the feeding roller 52 and the separating roller 60 rotate freely as the original to be transmitted is carried out. Further, the lever 33 engages with the notch 32 of the clutch disc 31, thereby disengaging the clutch 30 and stopping the rotation of the disc cam 100. As a result, the cam follower 99 is again connected to the top portion 100 of the disk cam 100, as shown in FIG.
a to hold the presser plate 87 in the raised position as shown in FIGS. 10 and 12.

Then, the rear end of the transmitted document passes through the detector 27, and when it is detected by the detector 27, the first and second solenoids 35 and 47 are energized again, and from then on, the document mounting table 1 The above-described operation is repeated until all of the above transmission originals are fed.

If a paper jam is detected because the detector 27 does not detect the passage of the transmitted document within a predetermined time,
The solenoid 83 is energized, the lever 82 is rotated clockwise from the position shown in FIG. 18 to the position shown in FIG. 19, and the lever 76 and shaft 62 are rotated. Then, the brake plate 65 is lifted together with the support case 69, and it is slightly separated from the separation roller 60 and moved to the brake non-action position. As a result, the original document jammed between the separating roller 60 and the brake plate 65 can be easily removed from between the two. That is, when a paper jam is detected, the lever 76 is rotated to the position shown by the solid line in FIG. Also, when cleaning the brake plate 65 and separation roller 60,
As shown by the broken line in FIG. 19, the operating knob 80 is rotated by hand to greatly raise the brake plate 65 via the shaft 62 and the support frame 64 to the cleaning position. Even in the unlikely event that it is difficult to remove the paper with just a slight separation during the paper jam, the brake plate 65 is swung up to the position shown by the broken line in FIG. 19 (cleaning position).

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a facsimile device equipped with a paper feeding device according to the present invention, FIG. 2 is a schematic side view showing the paper feeding device and the drive system of the facsimile device, and FIG. A plan view showing the main parts of one embodiment of the paper feeding device (this third
4 is a plan view showing the roller arrangement portion; FIGS. 5 and 6 are sectional views taken along lines - and - in FIG. 3, respectively; FIG. 7 is a sectional view corresponding to the sectional view taken along the line - in FIG. 3 showing another embodiment of the presser plate, and FIG. a perspective view showing the brake plate in the braking position;
9 and 10 are sectional views taken along the lines - and - in FIG. 3, respectively; FIG. 11 is a sectional view showing another state of the portion shown in FIG. 10; and FIGS. 12 and 13. , Fig. 14 corresponds to the lines XII-XII in Fig. 3, respectively.
15 is an enlarged vertical sectional view showing the separation roller, brake plate, and stopper member, and FIG. 16 is a cross-sectional view taken along the lines shown in FIG. 3 with the brake plate placed in the cleaning position. 17 is a perspective view of the main parts showing the state during disassembly and cleaning, and FIGS. 18 and 19 are left side views of FIG.
The figure is an operational diagram for explaining a state in which the brake plate is moved to a brake non-action position and a cleaning position. DESCRIPTION OF SYMBOLS 1... Document placement table, 2... Reading unit, 7... Electric motor, 11... Roller drive shaft, 30... Clutch, 39... Spring clutch, 52... Feeding roller, 60... Separation roller, 65 ... Brake plate, 74 ... Stopper member, 76, 82 ... Lever, 83 ... Solenoid, 87 ... Holding plate, 86
... shaft, 98 ... lever, 99 ... cam follower, 100 ... disc cam.

Claims (1)

[Scope of Claims] 1. A separation roller 60 that is rotationally driven in the sheet feeding direction; and a feeding roller 52 that is provided in a sheet feeding path in front of the separation roller 60 and that is rotationally driven in the sheet feeding direction. and a brake application position where the brake is in contact with the circumferential surface of the separation roller 60, a brake non-application position where it is slightly separated from the circumference of the separation roller 60, and a cleaning position where it is largely separated from the circumference of the separation roller 60, respectively. The brake member 65 includes a movable brake member 65, and a drive device 64, 76, 80, 82, 83 that drives the brake member 65 between the brake application position and the brake non-action position, and the brake member 65 includes: A paper feeding device characterized in that it is moved to the cleaning position during cleaning, and moved to the brake non-action position by the drive device when a paper jam occurs.