JPS64319Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device, and more particularly to a paper feeding device for feeding roll paper.

For example, in a copying machine equipped with such a paper feeding device, when the original or the optical system reaches a predetermined position, the copy paper cutting device cuts the rolled copy paper fed from the paper feeding device into the desired position. At the same time as cutting the paper to length, the paper feeding operation of the paper feeding device is stopped. However, in such a copying machine, if there is a delay in the return of the cutting blade in the copy paper cutting device after the cutting operation, and if there is a delay in stopping the paper feeding operation in the paper feeding device, the leading edge of the copy paper will be cut off. If the blade protrudes beyond its original position and comes into contact with the cutting blade of the copy paper cutting device and bends, the copy paper may not be fed smoothly during the next copying process, leading to a paper jam.

An object of the present invention is to provide a paper feeding device that solves the above-mentioned technical problems and prevents paper jams.

The present invention provides a paper feed roller that is arranged on a conveyance path for rolled paper and is rotatable, and a paper feed roller that is arranged downstream of the paper feed roller in the conveyance path and includes a cutting device that cuts the rolled paper. In the apparatus, a driving force transmitting means for transmitting a rotational driving force in the paper feeding direction to a rotating shaft of the paper feeding roller, a driving force transmitting means interposed between the rotating shaft and the driving force transmitting means, and transmitting the driving force from the driving force transmitting means. a paper feed clutch capable of switching between a first state in which the driving force is transmitted to the rotary shaft and a second state in which the driving force is not transmitted to the rotary shaft and the rotary shaft is allowed to rotate in the opposite direction; They are supported in contact with each other and are urged in the opposite direction to the paper feeding direction by a spring biasing means, and when a force exceeding the force of the spring biasing means is applied by the rotation of the rotating shaft, it is rotated to a predetermined position. The cutting device includes a braking body that comes into contact with the stop member at the stop member to stop its rotation, and the paper feed roller is cut by the cutting device almost at the same time as the paper feed clutch enters the second state, thereby spring-loading the paper feed roller. This paper feeding device is characterized in that it is angularly displaced in the opposite direction to the paper feeding direction by force means to slightly return the paper that is upstream of the cutting device.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an electrostatic copying machine according to an embodiment of the present invention, and FIG. 2 is a simplified vertical sectional view of the electrostatic copying machine as seen from the front side. A roll of copy paper 4 on which a photoconductive film is formed is housed in the body 2 of this electrostatic copying machine. The rolled copy paper 4 is
A pair of paper feed rollers 10 and 12 feed paper from a guide plate 8 along a copy paper conveyance path 6 shown by a broken line, and the paper is guided to a copy paper cutting device 14 . This copy paper cutting device 14 includes a rotary blade 16 and a fixed blade 18, and the copy paper is cut by rotation of the rotary blade 16. A pair of conveyance rollers 17 and 19 provided on the downstream side of the cutting device 14 in the copy paper conveyance path 6
The copy paper is guided to a charging device 20 and an exposure area 22 in this order. In the charging device 20, a charge is applied to the photoconductive coating of the copy paper by corona discharge, and an electrostatic image corresponding to the image of the original is formed in the exposure area 22. The copy paper on which the electrostatic image has been formed is guided to a developing device 28 by a pair of transport rollers 24 and 26 provided on the downstream side of the exposure area 22 in the transport direction. In this developing device 28, the copy paper and the circumferential surface of a cylindrical holding member 32 that magnetically holds the powder toner 30 on the surface are moved at the same speed, and the powder toner 30 causes an electrostatic charge on the copy paper. The image becomes visible. The powder toner 30 is stored above the holding member 32 and the holding member 3
A toner replenishing machine 34 for replenishing the toner 2 is provided, and a guide roller 36 for guiding the copy paper is provided below the holding member 32. A pressure fixing device 38 is provided on the downstream side of the developing device 28 along the copy paper transport path 6. The copy paper developed in the developing device 28 passes between a pair of pressure rollers 40 and 42 of the pressure fixing device 38, thereby fixing the unfixed toner image on the copy paper. The fixed copy paper is discharged onto a copy tray 48 by a pair of discharge rollers 44, 46.

The original is inserted from the original insertion slot 54 along the original insertion cursor 52 provided at the top of the machine 2, passes through a pair of upper and lower transport rollers 56, 58, 60, and 62 along the original transport path 50, and then passes through the scanning window 64. The document passes through the top, passes through a pair of upper and lower transport rollers 66 and 68, and is discharged to the document receiver 70. The original is in scanning window 6
4, the image of the document is focused by optical system 72 onto the copy paper in exposure area 22. In the optical system 72 , light from an exposure lamp 76 including a reflecting mirror 74 is irradiated toward the scanning window 64 , and reflected light from the original passes through the reflecting mirror 78 , an in-mirror lens 80 , and a reflecting mirror 82 to the exposure area 22 . is irradiated. This exposure amount is adjusted by operating a dial 84 provided on the front of the body 2.

Drive conveyance rollers 56, 60, and 66 for conveying documents are respectively pivotally supported on the upper part of the body 2. When copying a single original, the first
As shown in the figure, a manual document feed assembly 86 is attached to the upper part of the machine body 2. In this installed state, directly above the driving conveyance rollers 56, 60, 66,
Driven conveying rollers 58, 62, and 68 are positioned in contact with and driven by the driving conveying rollers 56, 60, and 66, respectively, thereby forming a document conveying path 50. When it is desired to make multiple copies from a single document, by setting a counter dial 88 provided on the front of the machine body 2 to a predetermined number of copies, the set number of copies will be made as described later.

If it is desired to automatically copy a plurality of documents, an automatic document feed assembly (not shown) is mounted on the top of the machine body 2 in place of the manual document feed assembly 86.

A power switch 92 is provided on the front of the body 2. The pilot lamp 336 lights up when the power is turned on to indicate that the power has been turned on and instructs the insertion of a document, and also blinks to indicate that there is a paper jam in the document or roll copy paper 4 or that the roll copy paper 4 is running out. Show that.

FIG. 3 is a simplified vertical cross-sectional view of the copying machine seen from behind. By turning on the power switch 92,
The motor 96 (see FIG. 2) is constantly rotated. A sprocket 98, 1 is attached to the rotating shaft of this motor 96.
00 is provided coaxially. One sprocket 9
The guide roller 36, the conveyance roller 26, the conveyance roller 17, and the paper feed roller 10 are rotationally driven by the chain 102 around which the conveyance roller 8 is wound. A chain 104 wrapped around the other sprocket 100 drives the discharge roller 44 and the pressure roller 40 to rotate. Rotating shaft 206 of paper feed roller 10
A paper feed clutch 106 is interposed between the sprocket 202 (shown in the sixth figure) and the sprocket 202 (shown in the sixth figure) around which the chain 102 is wound. Chain 102 is
It is wound around the input side of an electromagnetic clutch 108 which is capable of three states: forward rotation, reverse rotation, and disconnection. A chain 110 wrapped around the output side of the electromagnetic clutch 108 rotates the driving conveyor rollers 56, 60, 66. In its forward rotation state, the electromagnetic clutch 108 transmits the rotational torque of the chain 102 to the chain 110 in the forward direction indicated by the arrow. The document is thereby transported in the copy exposure direction 112 at a relatively low speed. In the reversed state, chain 10
The rotational torque of 2 is transmitted in the opposite direction to the chain 110 via the electromagnetic clutch 108, and the document is returned at a relatively high speed in the opposite direction of the copy exposure operation direction 112. In the disconnected state, the rotational torque of chain 102 is not transmitted to chain 110. Drive conveyance rollers 56, 60, which convey the original;
66 is rotated at the same circumferential speed. Copy paper conveyance path 6
The paper feed roller 10, conveyance rollers 17, 26, guide roller 36, pressure roller 40, and ejection roller 44 that convey the copy paper 4 along are also rotated so that their circumferential speeds are the same as the exposure speed. .

4 is a plan view of a portion of the machine body 2 with the manual document feed assembly 86 removed from the machine body 2, and FIG. 5 is a bottom view of the manual document feed assembly 86. The scanning window 64 is provided with a transparent glass plate 114. At the top of the machine body 2, between the conveyance rollers 56 and 60 and between the conveyance rollers 60 and 6
Guide plates 116 and 118 are provided between the two.
The manual document feed assembly 86 is provided with a pressure bonding plate 120 for sandwiching the document between the driven conveyance rollers 58 and 62 and the guide plate 116. Similarly, a pressure bonding plate 122 is placed between the conveyance rollers 62 and 68.
is provided. Original manual feed assembly 86
is attached to the machine body 2, the driving conveyance roller 5
8, 62, 68 are individually driven by the corresponding drive conveyance rollers 56,
60 and 66, respectively.

On the side walls 130, 132 of the body 2, pins 134, 136 having horizontal axes are provided to protrude inwardly in front of the driving conveyance roller 66 in the copy exposure operation direction 112. At the front end of the manual document feed assembly 86 in the copy exposure operation direction 112,
Locking pieces 138 and 140 are provided in a protruding manner. A notch 142 opened below the locking pieces 138, 140,
144 is locked to the pins 134 and 136, and the manual document feed assembly 86 is removably attached to the body 2. In addition, the manual document feed assembly 86 is rotatable around the axes of the pins 134 and 136, and maintains the state shown in the second figure in the attached state. Also, manual feed assembly 86 for originals.
When rotated counterclockwise in FIG. 2 around the axes of pins 134 and 136, the pair of conveyor rollers
6, 58, 60, 62, 66, and 68 are separated and opened.

A first detection means S1 for detecting the trailing edge of the document is provided immediately in front of the conveyance rollers 56 and 58 in the copy exposure operation direction 112. The second detection means S2 for detecting the leading edge of the document is located in front of the first detection means S1 in the copying exposure operation direction 112 and located in front of the conveyance roller 60,
It is provided rearward and close to 62. The first detection means S1 includes a light emitting element 146 provided in the manual document feed assembly 86 and a light emitting element 14 thereof.
6, the light receiving element 148 provided in the fuselage 2
It consists of The second detection means S2 similarly includes a light emitting element 150 and a light emitting element 152 corresponding to the light emitting element 150.

Referring again to FIG. 2, in the copy paper transport path 6, between the transport rollers 17, 19 and the charging device 20, there is a third detection means S for detecting the leading edge of the copy paper 4.
3 is provided. Exposure area 22 and conveyance roller 26
A fourth detection means S4 for detecting the trailing edge of the copy paper 4 is provided between the copy paper 4 and the copy paper 4. Near the rear end of the guide plate 8 in the conveyance direction, a fifth detection means S5 for detecting the end of the copy paper 4 is provided.

Along the copy paper conveyance path 6, paper feed rollers 10,1
2 to the conveyance rollers 17, 19, the distance from the conveyance rollers 17, 19 to the conveyance rollers 24, 26, the distance from the conveyance rollers 24, 26 to the holding member 32 and the guide roller 36, the holding member 32 and the guide roller 36 The distance from the cutting device 1 to the pressure rollers 40, 42 and the distance from the pressure rollers 40, 42 to the discharge rollers 44, 46
4 is shorter than the distance 1 from the cutting position P1 to the third detection means S3. The distance 2 between the first and second detection means S1, S2 is equal to the distance 1 from the cutting position P1 to the third detection means S3 (1
=2). Further, the distance 3 from the second detection means S2 to the conveyance rollers 66, 68 is greater than the distance 4 between the third and fourth detection means S3, S4. The distance 7 between the second detection means S2 and the scanning window 64 is chosen to be the same as the distance 8 between the third detection means S3 and the exposure area 22. Fifth detection means S5
The distance 9 from 9 to the cutting position P1 along the copy paper transport path 6 is the distance from the paper feed rollers 10, 12 to the transport rollers 17, 19,
the distance from the conveying rollers 24, 26 to the holding member 32 and the guide roller 36, the distance from the holding member 32 and the guiding roller 36 to the pressure rollers 40, 42, and the pressure rollers 40, 42. From the discharge roller 44,
greater than or equal to each distance up to 46. Fifth
The distance 10 from the detection means S5 to the paper feed rollers 10, 12 is the distance 10 from the cutting position P1 to the conveyance rollers 17, 12,
The distance to 19 is greater than or equal to 11 (10≧11).

FIG. 6 is a detailed perspective view of the vicinity of the paper feed clutch 106 shown in FIG. 3, and FIG. 7 is a sectional view taken along a vertical plane including the axis of the paper feed roller 10 shown in FIG. The paper feeding device 200 includes a paper feeding roller 10,
A sprocket 202 as a driving force transmission means,
It includes a paper feed clutch 106, a brake body 204, and a spring biasing means 254. The paper feed roller 10 is attached to a side wall 132 of the machine body 2 in a paper feed direction 2 of the rolled copy paper 4.
08 and the opposite direction.
Sprocket 202, paper feed clutch 106,
The braking body 204 refers to the rotating shaft 20 of the paper feed roller 10.
6 is provided on the outer side of the side wall 132.

The paper feed clutch 106 includes a rotating body 210 fixed to a rotating shaft 206, a clutch body 214 surrounding a cylindrical portion 212 of the rotating body 210 while allowing rotation of the rotating body 210, and a disc portion of the rotating body 210. 216
It includes a disc-shaped armature 218 that can be freely moved toward and away from the rotary shaft 206 and is loosely fitted to the rotating shaft 206. The clutch body 214 is connected to the side wall 132 via a connecting rod 220.
It is hardened. The clutch body 214 also has an armature 218 with respect to the disk portion 216 of the rotating body 210.
and an electromagnetic coil 222 located on the opposite side.

The sprocket 202 is loosely fitted onto the rotating shaft 206 and is interposed between the side wall 132 and the paper feed clutch 106. An armature 218 is interposed between the sprocket 202 and the disk portion 216 of the paper feed clutch 106, and the armature 218 is connected to the spring 22.
4 to the boss 226 of the sprocket 202. The armature 218 is biased by a spring 224 in a direction away from the disc portion 216 of the rotating body 210 .

Referring also to FIG. 8, the brake body 204 includes a drum 230, a band-shaped pressing member 232, and a tightening member 234. The drum 230 includes a cylindrical portion 236 fitted to the rotating shaft 206 and a cylindrical portion 23.
A pair of flanges 237, 23 formed at both ends of 6
It consists of 8. The tightening member 234 is attached to the drum 2
30, and a pair of cylindrical portions 240 that surround almost the entire circumference of the cylindrical portion 236; It is formed from sandwiching portions 242 and 244. A pressing member 232 is interposed between the cylindrical portion 236 of the drum 230 and the outer surrounding portion 240 of the tightening member 234. This pressure contact member 232
is made of a resilient, flexible material such as felt.

In the tightening member 234, the clamping portion 24
A pair of through holes 246 and 248 are bored in the holes 2 and 244. The clamping portions 242 and 244 have through-holes 24
The screw member 250 inserted through the screw member 6, 248 and the nut 251 screwed into the screw member 250 can move toward and away from each other, and in the close state, the pressure contact member 232 is pressed against the cylindrical portion 236 of the drum 230. As a result, the braking body 204 is
06 comes into frictional contact. Due to the frictional force in this frictional contact, the brake body 204 can rotate as the rotating shaft 206 rotates in the paper feeding direction 208.

The spring biasing means 254 is a helical spring,
One end thereof is the clamping portion 24 of the tightening member 234.
4, and the other end is locked to a rod-shaped body 256 that is fixed to the side plate 132 and has a horizontal axis. As a result, the brake body 204 is spring-biased in a direction opposite to the paper feeding direction 208. In relation to the spring biasing means 254, the side wall 132 has a stop located below the clamping portion 244 of the tightening member 234 for limiting the amount of rotation of the brake body 204 in the sheet feeding direction 208 to a predetermined amount of rotation. Member 257 is fixed.

The operation of the copying machine when making a single copy will be explained with reference to FIG. When the power switch 92 is turned on to perform copying, the motor 96 is activated. Further, when the pilot lamp 336 is turned on and the number of copies (single number) is set by operating the counter dial 88, the electromagnetic clutch 10
8 is rotated in the normal direction.

When a document is inserted from the document insertion slot 54 along a document insertion cursor 52 provided at the top of the machine body 2, the document is conveyed in the copy exposure operation direction 112 by conveyance rollers 58, 56. At this time, the length of the document is assumed to be greater than the distance 5 (=1+4) from the cutting position P1 to the fourth detection means S4. When the leading edge of the document is detected by the first detection means S1, the pilot lamp 336 is turned off. At this time, the paper feed clutch 106, the charging device 2
0, exposure lamp 76 is not activated.

When the original is further conveyed in the copying exposure operation direction 112 and its leading edge is detected by the second detection means S2, the electromagnetic clutch 108 stops normal rotation.
As a result, the movement of the original in the copy exposure operation direction 112 is stopped, and the front edge of the original is detected by the second detection means S2.
It remains stopped at the position. At this time, since the document is greater than the distance 2, the document remains detected by the first detection means S1. The charging device 20, the exposure lamp 76, and the paper feed clutch 106 are activated by the document detection by the first detection means S1 and the second detection means S2.

When the paper feed clutch 106 is activated, that is, the electromagnetic coil 222 is energized, the armature 218 is attracted to the disc portion 216 of the rotating body 210 against the spring force of the spring 224, and the driving force from the sprocket 202 is applied. The signal is transmitted to the rotating shaft 206 of the paper feed roller 10. As the rotation shaft 206 rotates, the copy paper 4 begins to be conveyed by the paper feed roller 10. At this time, in the brake body 204, as shown in FIG.
is angularly displaced against the spring force of the spring biasing means 254 due to the frictional force between it and the cylindrical portion 236, and at a position where the frictional force and the spring force of the spring biasing means 254 are balanced, the angle is displaced. Displacement is stopped. In this way, the rotating shaft 206 of the paper feed roller 10 is connected to the pressing member 232.
The paper feeding roller 10 is rotated in the paper feeding direction 208 by the rotational movement against the frictional force in the paper feeding direction 208 . In this manner, the copy paper 4 is conveyed along the copy paper conveyance path 6 by the rotation of the paper feed roller 10 and the conveyance rollers 17 and 19.

When the leading edge of the copy paper 4 is detected by the third detection means S3, the electromagnetic clutch 108 rotates in the normal direction and conveyance of the original in the copy exposure operation direction 112 is restarted. At this time, the copy paper 4 and the original are transported with their leading edges aligned and at the same exposure speed.

The leading edge of the copy paper is further conveyed to the fourth detection means S.
4, charging device 20 and exposure lamp 76 remain activated. Further, the copy paper cutting device 14 is disabled, and the copy paper 4 and original document continue to be conveyed. At this time, an electrostatic image corresponding to the image of the original is formed on the surface of the copy paper 4 in the exposure area 22.

When the trailing edge of the document passes the first detection means S1, the copy paper cutting device 14 is activated to cut the copy paper 4. The length of the copy paper cut at this time is determined by the following reason:
(a), (b), and (c) are the same length as the manuscript. (a)
When the front edge of the original is at the second detection means S2, the front edge of the copy paper reaches the third detection means S3, so that the original and the copy paper run simultaneously and at the same exposure speed. (b) Cutting the copy paper when the trailing edge of the original reaches the first output means S1. (c) Distance 1=
Must be 2.

At the same time that the copy sheet cutting device 14 is activated, the paper feed clutch 106 in the paper feed device 200 is disabled, ie, the power to the electromagnetic coil 222 is cut off. As a result, the armature 218 is moved by the spring force of the spring 224 to the disk portion 2 of the rotating body 210.
16, and the driving force from the sprocket 202 to the rotating shaft 206 of the paper feed roller 10 is cut off. By stopping the rotation of the rotating shaft 206, the conveyance of the copy paper 4 by the paper feed roller 10 is stopped. At this time, in the brake body 204, as shown in FIG. 9, the tightening member 234 is
Due to the spring force of the spring biasing means 254, the paper feed direction 2
08 and is rotated in the opposite direction. As a result, the paper feed roller 10 is rotated in the opposite direction to the paper feed direction 208,
The leading edge 4a of the copy paper 4 fed in the next copying process is moved back from the cutting position P1 of the copy paper cutting device 14. At this time, the amount of rotation of the paper feed roller 10 in the opposite direction is
06 and the spring force of the spring biasing means 254 are balanced, the leading end 4a of the copy paper 4 will not be moved back excessively. Furthermore, the stop member 257 prevents an increase in the amount of rotation that may occur due to changes in the spring biasing means 254 over time. As a result, the leading edge 4a of the copy paper 4 to be fed in the next copying process is aligned with the paper feed direction 2 on the paper feed roller 10.
Due to the delay in stopping the rotation operation in step 08, it is prevented from protruding beyond the cutting position P1 as shown in FIG. 9. Therefore, as shown by the imaginary line in FIG. 92, even if there is a delay in the return of the rotary blade 16 after the cutting operation in the copy paper cutting device 14, the protruding portion at the leading end 4a of the copy paper 4 will be removed by the rotary blade. 16 and will not bend.

At the same time that the trailing edge of the original reaches the second detecting means S2, the trailing edge of the copy sheet having the same length as the original reaches the third detecting means S3. At this time, the electromagnetic clutch 10
8 is maintained in a normal rotation state, and at this time, the paper feed roller 10 is not activated.

Even when the copy paper is further conveyed and its rear end reaches the fourth detection means S4, the electromagnetic latch 108 continues to rotate normally. Therefore, the document continues to be conveyed further in the copying exposure operation direction 112, passes through conveyance rollers 66 and 68, and is discharged to the document receiver 70. The copy paper continues to be transported along the copy paper transport path 6 and is discharged onto the copy receiver 48, thus completing the copying. The stop member 257 described above may be omitted.

As another embodiment of the present invention, a paper feeding device having such a configuration may be provided in connection with, for example, a printing device other than a copying machine.

As described above, according to the present invention, the paper feed clutch does not transmit the driving force from the driving force transmitting means to the rotating shaft, and the rotating shaft allows rotational movement in the direction opposite to the rotation by the driving force transmitting means. Almost at the same time as the second state is reached, the paper roll is cut by a cutting device, and a braking body is supported in frictional contact with this rotating shaft, and the braking body is fed by a spring biasing means. Since the spring is biased in the direction opposite to the paper direction, the paper cut by the cutting device is angularly displaced in the direction opposite to the paper feeding direction, so that the paper upstream of the cutting device is aligned with the paper feeding direction. is moved back slightly in the opposite direction. Therefore,
This prevents the front edge of the paper from folding in the cutting device. Therefore, paper is fed smoothly in the next paper feeding process. This prevents paper jams.

Moreover, with the present invention, the paper located upstream of the cutting device is reliably returned after cutting.
Prevention of paper jams is reliably achieved.

Furthermore, in the present invention, the distance that the paper upstream of the cutting device is returned after cutting is always almost constant, thereby achieving the excellent effect that the length of the paper to be cut is accurate.

Furthermore, according to the present invention, unnecessary noise is not generated, vibration is not generated, and furthermore, the paper feed clutch transmits the driving force from the drive force transmission means to the rotating shaft of the paper feed roller. No load fluctuation occurs in this state, and in this way it is possible to stably and smoothly feed paper having a desired length.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an electrostatic copying machine according to an embodiment of the present invention, Fig. 2 is a simplified vertical sectional view of the copying machine shown in Fig. 4 is a plan view of a portion of the machine body 2 with the manual document feed assembly 86 removed from the machine body 2; FIG. 5 is a bottom view of the manual document feed assembly 86. 6 are specific perspective views of the vicinity of the paper feed clutch 106 shown in FIG.
The figure is a sectional view taken along a vertical plane including the axis of the paper feed roller 10 shown in FIG. 6, FIG. 8 is an exploded perspective view of the brake body 204 shown in FIGS. 6 and 7, and FIG. FIG. 2 is a front view of the vicinity of a paper feed roller 10 and a copy paper cutting device 14; 4...Rolled copy paper, 10...Paper feed roller, 10
6... Paper feed clutch, 202... Sprocket, 20
4... Braking body, 206... Rotating shaft, 254... Spring biasing means.

Claims (1)

[Claims for Utility Model Registration] A rotatable paper feed roller disposed on a conveyance path for rolled paper; and a cutting device disposed downstream of the paper feed roller in the conveyance path for cutting the rolled paper. A sheet feeding device comprising: a driving force transmitting means for transmitting a rotational driving force in the sheet feeding direction to a rotating shaft of the sheet feeding roller; a driving force transmitting means interposed between the rotating shaft and the driving force transmitting means, and a driving force transmitting means for transmitting rotational driving force in the sheet feeding direction to a rotating shaft of the paper feeding roller; a paper feed clutch capable of switching between a first state in which the driving force of the rotational shaft is transmitted to the rotational shaft and a second state in which the driving force is not transmitted to the rotational shaft and the rotational movement of the rotational shaft in the opposite direction is allowed; It is supported by a rotating shaft in frictional contact and is urged in a direction opposite to the paper feeding direction by a spring biasing means, and rotates when a force exceeding the force of the spring biasing means is applied by rotation of the rotating shaft. includes a braking body that abuts against a stop member at a predetermined position to stop its rotation, and cuts the paper by the cutting device almost at the same time as the paper feed clutch enters the second state, thereby stopping the paper feed. A paper feeding device characterized in that a roller is angularly displaced in a direction opposite to the paper feeding direction by a spring biasing means to slightly return paper located upstream of a cutting device.