JPH0229028B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is detachably attached to an office machine such as a printer or typewriter, and is connected to the office machine by using the rotational force of a platen provided on the office machine side. The present invention relates to a paper sheet feeding device for feeding paper sheets.

[Technical background of the invention]

2. Description of the Related Art Printers, typewriters, and the like are configured such that a pinch roller is circumferentially attached to a platen, and by rotating the platen in the normal direction, a sheet of paper inserted between the platen and the pinch roller is sent in a predetermined direction.

This type of office machine is generally equipped with a paper feeder having a paper holding section, and the paper sheets stacked and held in the paper holding section are taken out one by one by a separation roller and placed between a platen and a pinch roller. However, while the sheet between the platen and the pinch roller is being fed in the specified direction, the next sheet is not fed from the sheet feeding device. There is a need to.

On the other hand, it is desired that the sheet feeding device is not provided with a drive source and that the sheet feeding device is made to use the rotational force of the platen on the office machine side to perform sheet feeding.

Therefore, when transmitting the rotational force of the platen to the separation roller on the sheet feeding device side, it is necessary to prevent the feeding operation by the platen and the sheet feeding operation by the separation roller from being performed at the same time.One way to do this is to reverse the platen. It has been proposed to transmit the rotational force to the separation roller only when the platen rotates, and to feed paper sheets between the platen and the pinch roller while rotating the platen in the opposite direction.

FIGS. 1 to 5 show examples of conventional devices developed based on this idea. In the figure, reference numeral 1 denotes a passive rotating body provided on the side of the sheet feeding device, which is driven in conjunction with the platen by a common drive source. Further, reference numeral 2 denotes a cam plate mounted on a shaft 3 common to the passive rotating body 1, and the rotational force of this cam plate 2 is transmitted to the separation roller on the sheet feeding device side. An engaging piece 4 is rotatably supported on the passive rotating body 1.

The cam plate 2 has an engagement recess 5 in a part thereof, and a swinging piece 6 is pivotally supported in the vicinity of the engagement recess 5 . The swinging piece 6 has one end brought into contact with the cam surface of the cam plate 2 by a spring 7, and the other end covers the engagement recess 5. Further, the engaging piece 4 has an engaging pin 8 at its rotating end, and the engaging pin 8 is supported by a spring 9.
is brought into contact with the cam surface or the outer surface of the swinging piece 6.

Therefore, in order to rotate the separation roller on the sheet feeding device side by the drive source for driving the platen on the office machine side, the passive rotating body 1 is first rotated in the direction of the arrow as shown in FIG. The rotational direction of the drive source at this time is the direction in which the platen is rotated in the opposite direction.

As the passive rotating body 1 rotates, the engagement pin 8
moves from the cam surface of the cam plate 2 to the outer surface of the rocking piece 6, and when the position of the engaging pin 8 exceeds the fulcrum position of the rocking piece 6, the pressing force of the engaging pin 8 by the spring 9 is applied to the spring 7.
By overcoming this, the swinging piece 6 swings as shown in FIG. 2, and the other end of the swinging piece 6 comes into contact with the cam surface.

When the passive rotating body 1 further rotates in the same direction and the engagement pin 8 moves from the swinging piece 6 to the cam surface as shown in FIG. 3, the swinging piece 6 is returned to its original position by the spring 7.

When the rotational direction of the drive source is changed and the passive rotating body 1 is slightly rotated in the opposite direction (the direction in which the platen is rotated forward), the engagement pin 8 is inserted into the engagement recess 5 of the cam plate 2 as shown in FIG. You will be depressed.

Next, when the rotational direction of the drive source is switched again and the passive rotating body 1 is returned to the initial rotational direction, the engaging pin 8 is engaged with the engaging recess 5 of the cam plate 2, as shown in FIG. The rotating body 1 and the cam plate 2 rotate together, the rotational force of the cam plate 2 is transmitted to the separation roller on the paper sheet feeding device side, and the rotation of the separation roller feeds the paper sheets to the office machine side. become.

[Problems with background technology]

As described above, in conventional devices that feed paper sheets using a drive source for driving the platen on the office machine side, the separation roller is rotated only when the platen is rotated in the reverse direction. It requires a complicated mechanism that combines the plate 2, the engagement piece 4, the swinging piece 6, etc., and the rotation direction of the drive source must be changed many times, and the control on the office machine side to control the drive source is required. There was a problem that made the system complicated.

Furthermore, it is necessary to replenish the sheet feeding device with sheets while the separating roller is separated from the surface of the sheet, but this operation also has to be performed as a separate operation, which is troublesome.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and its purpose is to feed paper sheets by transmitting the rotational force of the platen on the office machine side to the separation roller with an extremely simple configuration, and to feed paper sheets. It is an object of the present invention to provide a sheet feeding device that does not require troublesome operations when replenishing or the like.

[Summary of the invention]

The paper sheet feeding device according to the present invention is configured such that a pinch roller is placed in circumferential contact with a platen and the platen is rotated in the forward direction so that the paper sheet inserted between the platen and the pinch roller is fed in a predetermined direction. A main body of a feeding device is detachably attached to an office machine, and the main body of the feeding device is provided with a paper sheet holding section that is provided on the main body of the feeding device. a separation roller that rotates in a predetermined direction to supply the paper sheet at the end position between the platen and the pinch roller; a rotation lever rotatably provided on the supply device main body;
A pair of actuating rotors are provided on both left and right sides of the separation roller so as to rotate coaxially and integrally with the separation roller and are pivotally supported by the rotary lever; a pair of left guide pulleys disposed on both sides; and a pair disposed on both sides of the right operating rotating body, at least one of which rotates integrally with one of the pair of left guide pulleys. the right guide pulley,
A drive pulley is provided to be rotatable as the platen rotates, and this drive pulley is wound around a pair of guide pulleys on either the right or left side and an operating rotating body on either the right or left side of the platen. an endless belt for transmitting rotation, which transmits the rotation to a pair of guide pulleys on the right or left side, and which uses its tension to separate the separation roller from the paper sheets when the platen rotates in the forward direction, and the other pair of guide pulleys; An endless belt wound around the other working rotating body, a one-way clutch to which the rotation of the platen is transmitted via either the right or left guide pulley, and the one-way clutch is activated only when the platen is rotated in the opposite direction. The crank mechanism includes a crank mechanism whose rotation is transmitted through the crank mechanism, which brings the separation roller into contact with the paper sheet, and allows the separation roller to feed the paper sheet toward the platen. This will be explained with reference to the principle diagram in Fig. 6. In the figure, reference numeral A indicates a separation roller, and on both left and right sides of this separation roller A, a pair of actuating rotating bodies B and C are coaxially rotated integrally. is provided, and the rotating lever D
It is pivoted on. A pair of left guide pulleys E and F are provided on both sides of the left operating rotating body B, and a pair of right guide pulleys G and H are provided on both sides of the right operating rotating body C. Of these guide pulleys E, F, G, and H, E and G or F and H are configured to rotate together.
An endless belt K for rotation transmission is wound around a drive pulley J that rotates with the rotation of one of the right and left guide pulleys, for example, the left guide pulleys E and F, the left operating rotating body B, and the platen I. On the other hand, for example, an endless belt L is wound around the right guide pulleys G, H and the right operating rotating body C. When the platen I rotates forward (indicated by the solid line arrow in the figure), the rotation transmission endless belt K and the endless belt L rotate in the direction shown by the solid line arrow, thereby causing the pair of actuating rotating bodies B, C. Rotate the rotation lever D to remove the separation roller A.
pull it away from the paper sheet. Furthermore, when the platen I rotates in the opposite direction (in the direction shown by the dotted chain arrow in the figure), the rotation transmission endless belt K and the endless belt L rotate in the direction shown by the dotted chain arrow, thereby causing the pair of operations to occur. By rotating the rotating bodies B and C and rotating the rotating lever D using a one-way clutch and crank mechanism, the separation roller A is brought into contact with the paper sheet, allowing the separation roller A to feed the paper toward the platen I. The configuration is as follows.

Therefore, with an extremely simple configuration, paper sheets can be fed by transmitting the rotational force of the platen to the separation roller, and the separation roller is pressed against the surface of the paper sheet only when the platen is rotating in the opposite direction. Therefore, even when replenishing paper sheets or the like, there is no need to separate the separation roller from the surface of the paper sheets. Operating rotating bodies are provided on both the left and right sides of the separation roller, and the endless belt for rotation transmission and the endless belt transmit the rotation of the platen, so that the contact with the paper surface is even, and the paper feeding operation can be carried out smoothly. It becomes possible.

[Embodiments of the invention]

7 to 11 show an embodiment of the present invention, and FIG. 7 shows a state in which a sheet feeding device 12 is mounted on the top surface of an office machine 11 such as a printer or a typewriter. Paper sheet feeding device 12 is office machine 1
It is detachable from 1. In addition, FIG. 8 associates the paper sheet feeding device 12 with the office machine 11 side,
FIG. 2 is a longitudinal cross-sectional view with one (front side) side plate omitted.

As shown in FIG. 8, the office machine 11 has a platen 1
3. A pinch roller 14 surrounding this, and a paper guide 15 disposed along the outer periphery of the platen 13.
and a motor 16 for driving the platen.

On the other hand, the sheet feeding device 12 is provided with a detachable mounting base 18 at the bottom of the feeding device main body 17.

A platen gear 20 and a platen pulley 21 are attached to a shaft 19 of the platen 13, and a motor pulley 22 on the motor 16 side is configured to drive the platen pulley 21 via a belt 23.

The mounting base 18 of the paper sheet feeding device 12 is mounted on the office machine 11 by placing the legs 24 provided on the front left and right sides (only one side is shown) on the platen shaft 19. 24 has a pair of upper and lower transmission gears 2.
5 and 26 are provided to mesh the lower transmission gear 26 with the platen gear 20.

Further, a passive gear 27 and a timing pulley 28 serving as a driving pulley are coaxially provided at the lower part of one side plate of the supply device main body 17, and the passive gear 27 is meshed with the transmission gear 25. Furthermore, one side plate has a pair of timing pulleys 2 at the front and rear as left guide pulleys.
9a and 30a, and a timing pulley 31a is provided at the rear. Similarly, the other side plate (not shown) is also provided with timing pulleys 29b, 30b and a timing pulley 31b as a pair of right guide pulleys. The timing pulley 29b is configured to rotate together with the timing pulley 29a. Further, rotary levers 32a and 32b are provided on the left and right side plates (only one side is shown) of the supply device main body 17, respectively, as shown in FIG. supported. A pair of left and right separation rollers 34 and a pair of left and right timing pulleys 35a and 35b as actuating rotors are integrally attached to the roller shaft 33, respectively. A timing belt 36a as an endless belt for rotation transmission is wrapped around these timing pulleys 28, 29a, 35a, 30a, and 31a, and a rotation transmission mechanism 37 is constituted together with the transmission gears 25 and 26. A timing belt 36b as an endless belt is wrapped around 29b, 35b, 30b, and 31b. In addition, 38a, 38b, 39 in the figure
a and 39b are stoppers for controlling the rotation range of the rotation levers 32a and 32b. Also, the 8th
In the figure, reference numerals 40 and 41 are guide rollers that are in contact with the back surface of the timing belt 36a and guide the belt 36a, and 42 is a tension roller that is pressed against the back surface of the belt 36a by the elasticity of a spring 43. The timing pulley 30a has a small gear 4.
4 are integrally provided. The apparatus main body 1 is located below the timing pulley 30a.
A crankshaft 45 that is pivotally supported between the left and right side plates of 7 is disposed. At both ends of the crankshaft 45, a ninth
As shown in the figure, disc-shaped cranks 46a and 46b are integrally attached, and one end of the crankshaft 45 has a one-way clutch 4 equipped with a large-diameter reduction gear 47.
8 is provided. Then, the reduction gear 47 is meshed with the small gear 44, and the timing pulley 30a
is configured to transmit the rotation of the clutch to the one-way clutch 48. The one-way clutch 48 is configured to transmit the rotational force to both cranks 46a, 46b when rotating counterclockwise in FIG. 8, but not when rotating clockwise. Further, one end of the brake lever 49 is attached to a spring 50 on the outer periphery of one crank 46a, as shown in FIG.
are brought into contact by the elasticity of

The timing pulleys 29a and 29b are supported by a shaft 51 supported between the left and right side plates, and are configured to rotate together as described above.
A sheet receiving roller 52 is integrally attached to this shaft 51, and a one-way clutch 53 is provided at one end of the same shaft 51. This one-way clutch 53 transmits the rotational force of the timing pulley 29a counterclockwise in FIG. 8 to the sheet receiving roller 52 via the shaft 51.
The configuration is such that no transmission occurs when the timing pulley 29a rotates clockwise.

Furthermore, cassette loading grooves 54 are provided on the inner surfaces of the left and right side plates (only one side is shown) of the feeding device main body 17, and paper sheet holding cassettes 55 as sheet holding portions are mounted in both loading grooves 54 relative to the feeding device main body 17. It is loaded from above at a slightly backward angle.

The paper holding cassette 55 has a paper mounting plate 56 placed therein, and the upper edge of the paper mounting plate 56 is rotatably supported inside the cassette 55. Paper sheets 57 of a predetermined size are stacked and held on this sheet placement plate 56. In addition, the paper sheet placement plate 5
6 has its lower end urged outward by a spring 58 from the lower surface side, and the maximum amount of rotation in the urging direction is such that the uppermost surface of the sheets 57 stacked and held comes into contact with the stopper 59. It is configured to be restricted by

The rotating levers 32a, 32b and the sheet holding cassette 55 move the separation roller 34 to the uppermost sheet 5 position by rotating the rotating levers 32a, 32b.
The relationship is such that it can be brought into selective contact with the lower surface of 7. And each rotation lever 32a, 32b is
The separation roller 34 is constantly urged in a direction to separate it from the surface of the sheet 57 by return springs 60a and 60b, respectively, and is held in contact with the stoppers 38a and 38b. Further, each of the cranks 46a, 46
b, one end of the connecting pieces 61a, 61b is pivotally supported at a position deviated from the center of rotation by a certain amount, and each connecting piece 61
Pressure springs 62a, 62b made of tension coil springs are stretched between the other ends of the cranks 46a, 46b. The pressure contact springs 62a, 62b have the rotary levers 32a, 32b on the stopper 38a, 38b side, and the connecting piece 6
The levers 1a and 61b are adjusted so that they have approximately the free length (in terms of tension) when they are closest to the rotating levers 32a and 32b. And connecting pieces 61a, 61b
As the cranks 46a and 46b rotate (counterclockwise rotation in FIG. 8), the rotating lever 32
As the distance from a and 32b increases, the pressure contact spring 62
a, 62b increases, and the return spring 60
a, 60b, rotate the rotating levers 32a, 32b toward the stoppers 39a, 39b, and the connecting piece 6
The separation roller 34 is configured to be brought into pressure contact with the surface of the sheet 57 while the cranks 1a, 61b are moving within a certain range (that is, while the cranks 46a, 46b are moving within a certain range each rotation).

Further, in a position in front of the cassette loading groove 54, a stocker 63 is provided for receiving processed paper sheets 57 sent out from the office machine 11 side.
The sheet receiving roller 52 is located at a lower position of this stocker 63, and the receiving pinch roller 6
It surrounds 4.

In FIG. 8, reference numerals 65 and 66 are a supply paper guide and a receiving paper guide provided at the lower part of the supply device main body 17, and the supply paper guide 65 is used to collect paper sheets taken out by the separation roller 34. 57 between the platen 13 and the pinch roller 14 on the office machine 11 side, and the receiving paper guide 66 guides the processed paper sheets 57 sent out from the office machine 11 side to the paper sheet receiving roller 52. and the receiving pinch roller 64 from below. Further, at the lower end of the back plate of the stocker 63, a single sheet insertion guide 67 is provided which leads from the inside of the stocker 63 to the paper supply guide 65.
is provided.

Next, the operation will be explained.

First, paper sheets 57 of a certain size are loaded into the paper sheet holding cassette 5.
5 on the paper sheet mounting plate 56, and the paper cassette 5
5 into the cassette loading groove 54 to obtain the state shown in FIG.

Therefore, when a predetermined operation for feeding paper sheets 57 is performed, the motor 16 on the office machine 11 side is activated to rotate the platen 13 in the reverse direction (counterclockwise rotation in FIG. 8). The rotational force of the platen gear 20 is then transmitted to the passive gear 27 via the transmission gears 26 and 25 in sequence. Further, the timing pulley 30 is connected via the timing belt 36a.
Rotate a, 35a, 29a clockwise in the figure,
The rotational force of timing pulley 30a is transmitted to cranks 46a and 46b via one-way clutch 48. At this time, timing pulleys 29a and 29b
Since the timing pulley 29a rotates integrally with the timing pulley 29b, the timing pulley 29b also rotates, and this rotation is transmitted to the timing pulley 3 via the endless belt 36b and the timing pulley 30b.
5b.

As a result, the cranks 46a and 46b rotate clockwise in the figure, but this rotation is caused by the pressure contact spring 62.
The signal is transmitted to the rotating levers 32a, 32b via a, 62b, and the rotating levers 32a, 32b rotate from the stoppers 38a, 38b side to the stoppers 39a, 39b side. Then, the separation roller 34 comes into pressure contact with the surface of the uppermost paper sheet 57 as shown in FIG.
3 and the pinch roller 14. At that time, the timing belts 36a and 36
The tension of b is applied to the left and right timing pulleys 35.
Since it acts on both the left and right sides of the separation roller 34 via a and 35b, the separation roller 34 comes into even contact with the sheet 57. Note that at this time, platen 1
3 rotates in the opposite direction, the paper sheet 57 supplied from above is not drawn between the platen 13 and the pinch roller 14, and the lower end of the paper sheet 57 contacts the platen 13 and the pinch roller 14. held in a fixed position.

On the other hand, after the cranks 46a and 46b stretch the pressure springs 62a and 62b to the longest length,
Due to the elasticity stored in these springs 62a and 62b, they rapidly rotate in the same direction, and these springs 62a and 62b rotate rapidly in the same direction.
As the elastic force of a and 62b decreases, the rotating lever 3
2a, 32b are returned to the stoppers 38a, 38b by return springs 60a, 60b.

At this time, the power supply to the motor 16 is stopped, but
The cranks 46a, 46b are press-contact springs 62a, 62
It does not stay at the position where b is the shortest length, but rotates a predetermined amount by its own inertia. Therefore, the rotating levers 32a, 32b are again moved to the stoppers 39a, 3.
The separating roller 34 is rotated slightly in the direction 9b, and the separating roller 34 is held in a position where it is in light contact with the upper end of the sheet 57 that has been sent out. Here, as shown in FIG. 11, the lower end of the paper sheet 57 is brought into contact with the platen 13 and the pinch roller 14, and the upper end is brought into contact with the separating roller 34, so that the paper sheet 57 is prevented from returning upward, and the center part is slightly It is flexed and held in a state with an elastic force that extends up and down.

Next, when processing is performed on the paper sheet 57, for example, an operation to start printing is performed, the motor 16 is driven in the direction of forward rotation of the platen 13, and the rotational force of the platen 13 is transferred to the transmission gears 26, 25 and the passive gear 27. It is transmitted to the timing pulleys 29a, 35a, 30a via the timing belt 36a, further transmitted to the timing pulley 29b via the timing pulley 29a, and transmitted to the timing pulley 30b, via the timing belt 36b.
35b.

Then, the paper sheet 57, which was in a waiting state with its lower end in contact with the platen 13 and the pinch roller 14, is drawn between the platen 13 and the pinch roller 14 at the same time as the platen 13 starts rotating.
3, the paper is fed along the paper guide 15 so as to wrap around the outer periphery of the platen 13.

Further, since the timing pulley 30a at this time rotates in the opposite direction to the one-way clutch 48, no rotational force is transmitted to the cranks 46a, 46b. and timing belt 36a
and 36b start running, the rotating lever 32
a, 32b are timing belts 36a, 36b
Due to the tension of , and the return springs 60a, 60b, the separation roller 34 is immediately returned to the stoppers 38a, 38b, and the separation roller 34 is separated from the surface of the sheet 57. Therefore, even though the rotation direction of the separation roller 34 is opposite to the sheet feeding direction, the next sheet 57
is not supplied during forward rotation of the platen 13.

On the other hand, the paper sheet 57 processed in the office machine 11 is guided between the paper sheet receiving roller 52 and the receiving pinch roller 64 through the receiving paper guide 64; Since the rotational force from the platen 13 side is transmitted via the one-way clutch 53, and the direction of rotation is to send the paper sheets 57 upward, the paper sheets 57 are sent out from the office machine 11 side through the receiving paper guide 64. The paper sheet 57 that has been removed is drawn between the paper sheet receiving roller 52 and the receiving pinch roller 64, is sent upward, and is stored in the stocker 63.

Therefore, according to the sheet feeding device configured in this way, the separation roller 34 can be selectively moved by rotating the timing pulleys 35a, 36b and the rotation levers 32a, 32b via the timing belts 36a, 36b. Since the platen 13 can be brought into pressure contact with the surface of the paper sheet 57, the rotational force can be transmitted to the separation roller 34 even when the platen 13 rotates in any direction. By adopting such a configuration, a complicated mechanism as shown in FIGS. 1 to 5 becomes unnecessary, and a simple configuration can be achieved. By applying the tension of the timing belts 36a and 36b to both the left and right sides of the separation roller 34, it becomes possible to make even contact between the separation roller 34 and the sheet 57, thereby facilitating sheet handling. can. Furthermore, since the separation roller 34 does not come into pressure contact with the surface of the paper sheet 57 unless the platen 13 is rotated in the reverse direction, the separation roller 34 must be separately pulled out and inserted when the paper sheet holding cassette 55 is to be replenished. This can be done easily without any release operation.

〔Effect of the invention〕

The paper sheet feeding device according to the present invention is configured such that a pinch roller is placed in circumferential contact with a platen and the platen is rotated in the forward direction so that the paper sheet inserted between the platen and the pinch roller is fed in a predetermined direction. A main body of a feeding device is provided which is detachably attached to an office machine, and the main body of the feeding device is pressed against the surface of the outermost sheet of a plurality of sheets stacked and held in a sheet holding section. A separation roller is provided that rotates in a predetermined direction to feed the paper sheet at the end position between the platen and the pinch roller, a rotary lever is rotatably provided on the main body of the feeding device, and the separation roller A pair of actuating rotors are provided on both left and right sides of the separation roller, and a pair of actuating rotors are provided on both sides of the left actuating rotor. a pair of right guide pulleys, at least one of which is provided to rotate integrally with either one of the pair of left guide pulleys, on both sides of the right operating rotating body; A drive pulley is provided that can rotate as the platen rotates, and an endless belt for transmitting rotation is wound around the drive pulley, a pair of guide pulleys on either the right or left side, and an operating rotating body on either the right or left side. The rotation of the rotary platen is transmitted to a pair of guide pulleys on the right or left side, and when the platen rotates in the forward direction, the tension pulls the separation roller away from the paper sheet, and when the platen rotates in the reverse direction, the separation roller is separated from the sheet. It has a configuration in which an endless belt is wound around the other pair of guide pulleys and the other operating rotary body, which allows the sheet to be brought into contact with the sheet and fed in the direction of the platen by a separation roller.

Therefore, with an extremely simple configuration, the rotational force of the platen can be transmitted to the separation roller to feed the paper sheets, and the separation roller is pressed against the surface of the paper sheets only when the platen rotates in the reverse direction. There is no need to remove the separation roller from the surface of the paper when replenishing paper sheets, etc., and a pair of actuating rotating bodies are provided on the left and right sides of the separation roller, and an endless belt for rotation transmission and an endless belt. Since the tension is applied to both sides of the separation roller through this actuating rotating body, the separation roller comes into even contact with the paper sheets, which has great effects such as facilitating paper sheet handling. be.

[Brief explanation of drawings]

Figures 1 to 5 are plan views showing the conventional example, Figure 6 is a diagram showing the principle of the present invention, and Figures 7 to 1.
Fig. 1 shows one embodiment of the present invention, Fig. 7 is a perspective view showing a state in which a paper sheet feeding device is attached to an office machine, and Fig. 8 is a longitudinal section showing the paper sheet feeding device in relation to the office machine. 9 is a schematic perspective view showing the relationship between the rotary lever and the crank; FIG. 10 is a partial vertical cross-sectional view showing the separation roller in pressure contact with the uppermost sheet to take out the sheet; FIG. FIG. 11 is a diagram showing a state in which the separation roller, which has been separated by the inertial force of the crank, is again lightly abutted against the upper end of the sheet. 11... Office machine, 12... Paper sheet feeding device, 13
...Platen, 14...Pinch roller, 28...
Timing pulley (drive pulley), 29a, 30
a...Timing pulley (1 pair of left guide pulleys), 29b, 30b...Timing pulley (1 pair)
Pair of right guide pulleys), 32a, 32b...Rotating lever, 34...Separation roller, 35a, 35b
...timing pulley (a pair of left and right operating rotating bodies),
36a...Timing belt (endless belt for rotation transmission), 36b...Timing belt (endless belt), 55...Paper holding cassette (paper sheet holding section),
57...Paper leaf.

Claims (1)

[Claims] 1. Freely attached to and removed from an office machine configured so that a pinch roller is circumferentially attached to the platen and paper sheets inserted between the platen and the pinch roller are fed in a predetermined direction by rotating the platen in the normal direction. A feeding device main body attached to the main body of the feeding device and rotating in a predetermined direction by pressing against the surface of the paper sheet at the end position among the plurality of paper sheets stacked and held in a paper sheet holding section provided on the feeding device main body. a separation roller that feeds the paper sheet at the endmost position between the platen and the pinch roller; a rotary lever rotatably provided on the main body of the feeding device; and separation rollers on both left and right sides of the separation roller. a pair of actuating rotors which are provided to rotate coaxially and integrally with the rotary lever and are pivotally supported by the rotary lever, and a pair of left side actuating rotors disposed on both sides of the left actuating rotor of the pair of actuating rotors. a guide pulley, a pair of right guide pulleys disposed on both sides of the right operating rotary body so that at least one of them rotates integrally with one of the pair of left guide pulleys; A drive pulley is provided to be rotatable as the platen rotates, and this drive pulley is wound around a pair of guide pulleys on either the right or left side and an actuating rotating body on either the right or left side to control the rotation of the platen. Alternatively, there is an endless belt for transmitting rotation that transmits the information to the pair of guide pulleys on the left side and separates the separation roller from the paper sheet by its tension when the platen rotates in the forward direction, and the other pair of guide pulleys and the other pair of guide pulleys. An endless belt wound around a rotating body, and a one-way clutch that transmits the rotation of the platen through a guide pulley on either the right or left side.
A crank mechanism is provided, in which rotation is transmitted through the one-way clutch only when the platen is rotated in the reverse direction, bringing the separation roller into contact with the paper sheet and allowing the separation roller to feed the paper sheet toward the platen. A paper sheet feeding device characterized by: