JP3140827B2 - Sheet separating apparatus and sheet separating method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to OA equipment and the like.
The present invention relates to a sheet separating apparatus and a sheet separating method for separating sheets one by one when conveying stacked sheets.

[0002]

2. Description of the Related Art Conventionally, at both ends of a sheet cassette in which sheets are stacked and stored, a corner at the tip of the uppermost sheet is pressed by a separation claw, and the uppermost sheet is forcibly forced by a call roller. 2. Description of the Related Art There is a sheet separating apparatus that stops feeding and following of a sheet below the next layer with a separation claw.

There is also a sheet separating apparatus in which the stacked sheets are suctioned one by one by a negative pressure generating mechanism and sent out.

Further, a reverse roller or a friction pad driven by a motor via a torque limiter is brought into contact with the feed roller, and only the paper contacting the feed roller is forcibly sent out by the feed roller, and the reverse roller or the friction roller is fed. There is a sheet separating apparatus in which, when a plurality of sheets overlap and advance between a pad and a feed roller, advance of a sheet below the next layer is stopped by a reverse roller or a friction pad.

[0005]

In the method of pressing the corners on both sides of the leading end of the paper sheet with the separation claw, the paper sheet fed by the call roller is disengaged from the separation claw by being bent by its own waist strength. Since the stiffness of the leaf differs depending on the paper quality and thickness, the leaf may be broken or torn by the separating claw depending on the type of the leaf, and the probability of occurrence of jam increases.

The method of sucking a sheet with a suction device has a high sheet separating performance. However, the necessity of a negative pressure generating mechanism increases the size of the apparatus and increases the cost. In addition, noise is generated due to the suction / exhaust action of the negative pressure generating mechanism, and the work of replacing the paper sheet is troublesome.

In the friction separation method using a reverse roller or a friction pad, the frictional force acting between the feed roller and the sheet is set to the highest value, and then the reverse force between the reverse roller or the friction pad and the sheet is set. It is necessary to set the frictional force acting on the paper to a value higher than the frictional force acting between the paper sheets, but these frictional forces vary depending on the temperature and humidity in the use environment, and also vary depending on the paper quality of the paper,
Furthermore, it changes depending on the adhesion of paper powder. Therefore,
It is difficult to reliably separate paper sheets.

[0008]

According to a first aspect of the present invention, there is provided a transport force generating mechanism having a rotating body that comes into contact with a paper sheet and a drive unit that drives the rotating body, and the paper sheet is attached to the rotating body. The transport stopping force generating mechanism that is pressed against
Ri Na more the vibration mechanism for transmitting the reciprocating movement, the paper sheet of paper
Energy or vibration input to the vibration mechanism according to the quality
The dynamic frequency is controlled .

According to a second aspect of the present invention, in the first aspect, the vibration mechanism is constituted by the elastic body and the electromechanical transducer.

According to a third aspect of the present invention, in the first aspect, 2
A vibration mechanism that generates ultrasonic vibration of 0 kHz or more or low frequency vibration of 500 Hz or less is used.

According to a fourth aspect of the present invention, in the second aspect, a roller having a hollow inside is used as the transport inhibiting force generating mechanism, and an electromechanical transducer as a vibration source is provided on the inner surface of the roller at a predetermined interval. It is affixed.

According to a fifth aspect of the present invention, there is provided a transport force generating mechanism having a rotating body that comes into contact with a sheet and a driving unit that drives the rotating body, and a transport inhibiting force that presses the sheet against the rotating body. This is a paper sheet separating method in which a mechanism and a vibration mechanism for transmitting reciprocating vibration to the conveyance inhibiting force generating mechanism are provided, and energy or a vibration frequency applied to the vibration mechanism is controlled.

According to a sixth aspect of the present invention, there is provided a conveying force generating mechanism having a rotating body that comes into contact with a sheet and a drive unit that drives the rotating body, and a conveying inhibiting force that presses the sheet against the rotating body. A mechanism, a vibration mechanism for transmitting reciprocating vibration to the transport inhibiting force generating mechanism, and a sheet detector provided downstream of the transport inhibiting force generating mechanism in the sheet transporting path. A sheet separating method in which the vibration generating action of the vibration mechanism is gradually activated from a certain state, and the vibration generating action of the vibration mechanism is returned to a constant state after the sheet detector outputs a sheet detection signal. .

[0014]

According to the first aspect of the present invention, the sheet is conveyed by applying a conveying force from the rotating body of the conveying force generating mechanism to the stacked sheets, but a plurality of sheets are sent out in an overlapping manner. In this case, the following movement of the sheet below the next layer can be prevented by the transport inhibiting force generating mechanism, and at this time, by vibrating the transport inhibiting force generating mechanism by the vibration mechanism,
It is possible to suppress the transport inhibiting action of the transport inhibiting force generating mechanism, thereby setting the friction coefficient of the surface of the transport inhibiting force generating section to be high in advance, and vibrating the transport inhibiting force generating mechanism as necessary. In addition, paper sheets can be reliably separated according to changes in paper quality.

According to the second aspect of the invention, the vibration mechanism can be reduced in size and thickness by combining the elastic body and the electromechanical transducer.

According to the third aspect of the present invention, since the transport inhibiting force generating mechanism can be vibrated at a frequency of 20 kHz or more or 500 Hz or less, it is possible to suppress generation of noise due to the vibration.

According to the fourth aspect of the present invention, the structure can be simplified by arranging the vibration mechanism by utilizing the internal space of the roller as the conveyance inhibiting force generating mechanism, and the surface of the roller can be directly vibrated. Therefore, the control of the vibration can be facilitated, and accordingly, the control of the frictional force of the roller against the paper sheet can be facilitated, and the application range of the frictional force control can be expanded. .

According to the fifth aspect of the present invention, by controlling the energy or the vibration frequency applied to the electromechanical transducer, it is possible to change the transport inhibiting force of the transport inhibiting force generating mechanism without using a complicated control mechanism. As a result, the separating action of the paper sheet can be more effectively promoted.

According to the sixth aspect of the invention, the vibration generating action of the vibration mechanism is gradually activated from a constant state immediately after the start of sheet feeding, and the vibration mechanism is activated when the sheet detector detects the passage of the sheet. By returning the vibration generating action to a constant state, the transport inhibiting force of the transport inhibiting force generating mechanism can be changed over time, so that even if paper sheets of different paper quality are transported at random, Any paper sheet can be surely separated and conveyed at the time when the conveyance inhibiting force changes to the corresponding conveyance inhibiting force.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a paper feed cassette 1 is provided, although only a part is shown. The paper feed cassette 1 is provided with a bottom plate 2 to which a pad 3 is partially joined, which is urged upward by a spring 4 and can be raised and lowered. Many sheets 5 are stacked on the bottom plate 2. Further, a conveying force generating mechanism 7 having a feed roller 6 as a rotating body that is brought into contact with the tip of the uppermost sheet 5 on the bottom plate 2 and a drive unit (not shown) for driving the feed roller 6
And a friction pad 8 as a transport inhibiting force generating mechanism for pressing the sheet 5 against the feed roller 6.
The friction pad 8 is made of a material having a high coefficient of friction, such as polyurethane, for example. A mount 9 for holding the friction pad 8 is urged counterclockwise by a spring 10 to be rotatably held on a support shaft 11. ing. A vibration mechanism 12 as shown in FIG.
Is provided. That is, the vibration mechanism 12 includes an elastic body 13 formed of a metal material and a plurality of piezoelectric ceramics 14 and 15 as electromechanical transducers, and has a 20 k
The ultrasonic vibration of not less than Hz is transmitted to the friction pad 8. A plurality of protrusions 16 are formed on one surface of the elastic body 13 on the side of the friction pad 8 so as to be arranged in a comb shape. And the piezoelectric ceramics 14,
Numerals 15 are polarized and arranged alternately so that the polarization directions are opposite.

In such a configuration, the voltage applied to the piezoelectric ceramics 14, 15 is a sine wave or a pulse wave having the same phase. In the case of a pulse wave, it is desirable to add an offset corresponding to the amplitude. By applying this voltage, the piezoelectric ceramics 14 expand and contract as shown in FIG. 3A, and the piezoelectric ceramics 14 contract as shown in FIG.
5 is repeated, whereby a standing wave is generated in the elastic body 13 which is bent in the thickness direction. That is, the friction pad 8 vibrates. At this time, by making the frequency for driving the piezoelectric ceramics 14 and 15 equal to the resonance frequency of the elastic body 13, the amount of vibration displacement can be increased.

When the paper sheets 5 stacked on the bottom plate 2 are conveyed, a feed roller 6 is driven by a motor to apply a conveying force to the paper sheets 5 from the feed roller 6.
When the sheets are sent out while overlapping, the following progress of the sheet 5 below the next layer can be prevented by the friction pad 8. At this time, as described above, the friction pad 8
When the vibration is transmitted to the friction pad 8, a slight vertical movement occurs on the friction pad 8, and the frictional force on the paper sheet 5 decreases.
In other words, it is possible to suppress the transport inhibiting action of the friction pad 8. Thereby, the friction coefficient of the friction pad 8 is set to a relatively high value, and the conveyance inhibiting action of the friction pad 8 is suppressed in accordance with the change of the paper quality, so that various kinds of paper sheets 5 can be reliably separated. can do. This could be confirmed by the following experiment. That is, as shown in FIG. 4, the friction pad 8 is joined to a table 17 on which the vibration mechanism 12 is provided, and the weight 18 is placed on the paper sheet 5 placed on the upper surface of the friction pad 8. Paper sheet 5 (135
When the force required to pull the high quality paper (k high quality paper) was measured, it was confirmed that the tensile force was smaller when vibration was applied to the friction pad 8 than when no vibration was applied.

The elastic body 13 and the piezoelectric ceramic 1
Combination of the vibration mechanisms 4 and 15 makes it possible to reduce the size and thickness of the vibration mechanism 12. Further, since the friction pad 8 can be vibrated at a frequency of 20 kHz or more, it is possible to suppress the generation of noise due to the vibration.

In order to change the vibration applied to the friction pad 8 in order to change the conveyance inhibiting force in accordance with the change in the paper quality of the paper sheet 5, the piezoelectric ceramics 14, 1
5, a method of controlling the energy applied to the piezoelectric ceramics 14, 15; a method of controlling the energy applied to the piezoelectric ceramics 14, 15;
There is a method of controlling the drive frequency for driving the drive 15. In the present embodiment, a method of controlling the driving frequency is used.

That is, transparent paper (hereinafter, referred to as OHP paper) 135 used for drawing paper, postcards, and overhead projectors 135 For each different paper such as high-quality paper and envelopes, and the thickness of these papers A table is created by experimentally obtaining a drive frequency at which the conveyance blocking force by the friction pad 8 becomes an optimum value each time the change is made, and a table or the like is input by a switch or the like according to the sheet type. When the sheet feeding operation was performed based on the table data called by the above, all the sheets could be reliably separated and fed. Further, when the number of fed sheets exceeds several thousand and the feed roller 6 and the friction pad 8 are contaminated with paper dust, the piezoelectric ceramic 1
When the drive frequencies of 4, 15 were set again, it was confirmed that each sheet was satisfactorily separated and fed.

The feed roller 6 depends on the type of the paper sheet 5.
In other words, the frictional force of the feed roller 6 with respect to the paper sheet affects the sheet feeding operation. Therefore, the feed roller 6 may be vibrated by the vibration mechanism 12.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted (the same applies hereinafter). FIG. 5 is a vertical sectional side view showing a part of the mounting table 9 when viewed from the sheet feeding direction. A vibration mechanism 19 is embedded in the mount 9.
The vibration mechanism 19 includes a plurality of thin flexible portions 21 formed on a metal member 20 and a bridge 22 which is an elastic body that deforms the flexible portions 21 and displaces the flexible portions 21 in a direction orthogonal to the sheet conveying direction.
Is formed on one side of the bridge 22 and the base portion 23 of the metal material 20.
Are fixed at both ends. And
The friction pads 8 are joined to the upper surface on both sides of the metal material 20 and the upper surface of the bridge 22.

In such a configuration, the laminated piezoelectric element 2
The voltage applied to 4 is a sine wave or a pulse wave having the same phase. In the case of a pulse wave, it is desirable to add an offset corresponding to the amplitude. By applying this voltage, FIG.
When the laminated piezoelectric element 24 contracts as shown in FIG. 6A, the bridge 22 is displaced rightward, and when the laminated piezoelectric element 24 contracts as shown in FIG. By repeating this operation, the friction pad 8 is vibrated to reduce the conveyance inhibiting force on the sheet. In this embodiment, the driving frequency of the laminated piezoelectric element 24 is set to 80 Hz, which is equal to the resonance frequency of the bridge 22. According to our experiments, 50
If the frequency is lower than 0 Hz, the person does not feel too noisy, so the resonance frequency is set to 500H as in this embodiment.
It is desirable to make z or less. Further, the laminated piezoelectric element 24
By changing the driving voltage (energy), the vibration applied to the friction pad 8 can be changed to change the conveyance inhibiting force on the paper sheet.

[0029]

[0030]

Furthermore, a third embodiment of the present invention will be described with reference to FIGS. 7-9. Reference numeral 28 denotes a paper feed cassette. The paper feed cassette 28 is provided with a bottom plate 2 which is pushed up by a lever 29 so as to be able to move up and down, and a large number of paper sheets 5 are stacked on the bottom plate 2. Reference numeral 30 denotes a transport force generating mechanism. The conveyance force generating mechanism 30 includes a pickup arm 31 rotatably held and a pickup arm 3
A feed roller 32, which is a rotatable body rotatably held at the center of rotation of one, a call roller 33 rotatably held at a free play end of the pickup arm 31, and an end of the shaft of the feed roller 32; Gears 34 and 35 fixed to the end of the shaft of the call roller 33, and an idler gear 36 meshed with the gears 34 and 35 and rotatably held by the pickup arm 31. The feed roller 32
Is driven by a motor, and the rotation of the feed roller 32 is transmitted to the call roller 33 via a gear 34, an idler gear 36, and a gear 35. Further, a reverse roller 37 serving as a transport inhibiting force generating mechanism is provided, and the reverse roller 37 is pressed against the feed roller 32 by a pressing arm 39 urged by a spring 38.

The feed roller 32 has a diameter of 25 mm, and its outer periphery is formed of a material having a high friction coefficient such as rubber. The reverse roller 37 also has a diameter of 2
The outer circumference is made of a material such as urethane rubber having a high friction coefficient, but its friction coefficient is different from that of the reverse roller 37.

As shown in FIGS. 8 and 9 , a vibration mechanism 40 is provided inside the reverse roller 37. The vibration mechanism 40 includes a cylindrical elastic body 41 formed of a spring plate having a thickness of 0.2 mm and joined to the inner peripheral surface of the reverse roller 37, and a plurality of elastic bodies joined to the inner surface of the elastic body 41. It consists of piezoelectric ceramics 14 and 15. A hollow shaft 4 connected to a motor via a torque limiter (not shown) is provided at the center of the reverse roller 37.
2 are fixedly fitted, and the piezoelectric ceramics 14, 1
5 is connected to a hole 44 formed in the shaft 42.
Through the shaft 42. Further, a plurality of terminals (not shown) connected to each cord 43 are arranged on the outer periphery of the end of the shaft 42, and brushes (not shown) contacting these terminals are provided by being connected to a power supply. ing. That is, it is configured such that a voltage is applied to the piezoelectric ceramics 14 and 15 via these brushes, terminals and cords 43.

In such a configuration, the voltage applied to the piezoelectric ceramics 14, 15 is a sine wave or a pulse wave having the same phase. In the case of a pulse wave, it is desirable to add an offset corresponding to the amplitude. The application of this voltage causes a standing wave to bend in the thickness direction of the elastic body 41, and the outer periphery of the reverse roller 37 vibrates. At this time, the frequency for driving the piezoelectric ceramics 14 and 15 is
23 kHz, which is equal to the resonance frequency of No. 1. Thereby, generation of noise can be prevented.

When the sheets 5 stacked on the bottom plate 2 are conveyed, a call roller 33 and a feed roller 32 are driven by a motor.
To apply a conveying force to the paper sheet 5, but when a plurality of paper sheets 5 are sent out in an overlapped manner,
Can be prevented by the reverse roller 37 rotating in the opposite direction (clockwise direction in FIG. 7 ) to the transport direction of the paper sheet 5. At this time, when the vibration is transmitted to the reverse roller 37 as described above, the frictional force on the paper sheet 5 decreases. In other words, it is possible to suppress the transport inhibiting action of the reverse roller 37. Thereby, the friction coefficient of the reverse roller 37 is set to a relatively high value,
By suppressing the conveyance inhibiting action of the reverse roller 37 in accordance with the change in the paper quality, it is possible to reliably separate many types of paper sheets 5.

Furthermore, the fourth embodiment of the present invention will be described with reference to FIG. 1 0. In the present embodiment, a sheet detector 45 is provided near the downstream side of the reverse roller 37 in the configuration of the third embodiment, and the vibration generating action of the vibration mechanism 40 in the reverse roller 37 immediately after the start of sheet feeding. This is a sheet separating method in which the sheet is gradually activated from a constant state, and the vibration generating action of the vibration mechanism 40 is returned to a constant state after the sheet detector 45 outputs a sheet detection signal.

That is, in a normal state in which the pickup arm 31 is located above and the call roller 33 is separated from the sheet 5, when a paper feed start signal is input, the call roller 33, the feed roller 32, and the reverse roller 37 And the pickup arm 31 is moved down by a drive mechanism (not shown) to bring the call roller 33 into contact with the uppermost sheet 5. At this point, the vibration mechanism 40 is kept in a state of not vibrating. When the paper sheet 5 on the bottom plate 2 reaches the contact portion between the feed roller 32 and the reverse roller 37, the vibration mechanism 40 is vibrated with a small vibration, and the vibration generating action of the vibration mechanism 40 is activated with time thereafter. . This change is desirably made continuously. During this time, the reverse roller 37 for the sheet 5 is
Is large immediately after the start of sheet feeding, but gradually decreases. Here, since the friction coefficient of the reverse roller 37 is set to a value higher than that of the conventional roller, the sheet transporting force by the reverse roller 37 is higher than the sheet transporting force by the calling roller 33 and the feed roller 32. When the leading end of the sheet 5 reaches the reverse roller 37, non-feeding is likely to occur, or only one sheet 5 is separated. At this point, as described above, when the vibration generating action of the vibration mechanism 40 is gradually activated, the conveyance inhibiting force of the reverse roller 37 is gradually reduced, and the conveying force of the paper sheet 5 exceeds the conveying inhibiting force with time. As a result, the sheets 5 are surely separated one by one and pass between the feed roller 32 and the reverse roller 37 unless they bear a very strong static electricity. Then, when the sheet detector 45 detects the passage of the sheet 5, the vibration generating action of the vibration mechanism 40 is returned to a constant state (stop state), and the pickup arm 31 is rotated upward to call the call roller. 3
3 is released from the sheet 5 on the bottom plate 2, the call roller 33, the feed roller 32, and the reverse roller 37 are stopped, and the apparatus stands by for the next sheet feeding operation.

As described above, according to the present embodiment, an optimum condition is obtained in the process of changing the separation condition from a state in which non-feeding is likely to occur to a state in which double feeding is caused by controlling the conveyance inhibiting force of the reverse roller 37. You can look for separation conditions,
The paper sheet 5 of any paper quality can be reliably separated and conveyed without causing the operator to perform complicated operations.

In order to confirm the effect of the present embodiment, a paper-passing test was performed using drawing paper, OHP paper, and 135k high-quality paper that were randomly stacked.
It is confirmed that the probability of occurrence of a jam is considerably reduced as compared with the conventional separation mechanism even at the time when a jam occurs in the conventional case, even when the feeding roller 33, the feed roller 32, and the reverse roller 37 are contaminated with paper dust.

The paper sheet detector 45 in this embodiment is not specially provided for controlling the vibration mechanism 40, but is provided for detecting passage of the paper sheet 5 and executing other control. This is a diversion of a conventional photosensor.

[0041] Further, the fifth embodiment of the present invention will be described with reference to FIG 1. In the present embodiment, a pull-out roller 46 and a sheet detector 47 are provided downstream of the sheet detector 45 in the configuration of the fourth embodiment.
7, a plunger of a solenoid 48 driven by a sheet detection signal is connected to a pressing arm 39. Note that the paper sheet detector 47 is not specially provided for controlling the solenoid 48, but uses a conventional photosensor provided for detecting passage of the paper sheet 5 and performing other control. It was done.

The operation of this embodiment will be described with reference to FIG.
Only different points from the fourth embodiment will be described. That is, when the paper sheet 5 that has passed between the feed roller 32 and the reverse roller 37 reaches the pull-out roller 46, the paper sheet 5 is reliably separated into one sheet. Immediately after that, when the leading end of the paper sheet 5 is detected by the paper sheet detector 47, the solenoid 48 is excited to rotate the pressing arm 39, so that the reverse roller 37 for the paper sheet 5 contacting the feed roller 32 is rotated. Can be released. This can extend the period during which the reverse roller 37 reduces the dirt frictional force due to the paper dust, and therefore,
Further, even if the number of fed sheets increases, the sheet 5 can be reliably separated.

[0043]

According to the first aspect of the present invention, there is provided a transport force generating mechanism having a rotating body that comes into contact with a paper sheet and a drive unit that drives the rotating body, and a transport block that presses the paper sheet against the rotating body. a force generating mechanism, Ri Na more the vibration mechanism transmitting the reciprocal vibration in the transportation blocking force generating mechanism, wherein in response to paper quality of the paper sheet
Control energy or vibration frequency input to vibration mechanism
Since the way, the next layer in the case is to convey the paper sheet by applying a conveying force from the rotation of the conveying force generating mechanism laminated paper sheet, fed by overlapping a plurality of paper sheets The follow-up progress of the following sheet can be prevented by the transport inhibiting force generating mechanism. At this time, the transport inhibiting action by the transport inhibiting force generating mechanism is suppressed by vibrating the transport inhibiting force generating mechanism by the vibration mechanism. This makes it possible to set the friction coefficient of the surface of the conveyance-preventing force generator in advance to a high value, and to vibrate the conveyance-preventing force generating mechanism as necessary to ensure that the paper sheet responds to changes in paper quality. Has the effect of being able to be separated into

According to the second aspect of the present invention, since the vibration mechanism is constituted by the elastic body and the electromechanical transducer in the first aspect, the vibration mechanism can be reduced in size and thickness.

According to a third aspect of the present invention, in the first aspect, 2
Since the vibration mechanism that generates the ultrasonic vibration of 0 kHz or more or the low frequency vibration of 500 Hz or less is used, it is possible to suppress the generation of noise due to the vibration.

According to a fourth aspect of the present invention, in the second aspect, a roller having a hollow inside is used as the transport inhibiting force generating mechanism, and an electromechanical transducer as a vibration source is provided on the inner surface of the roller at a predetermined interval. Since it is attached, the structure can be simplified by arranging a vibration mechanism using the internal space of the roller, and the vibration of the roller can be controlled easily because the roller surface can be directly vibrated. Accordingly, it is possible to easily control the frictional force of the roller with respect to the paper sheet, and further, it is possible to expand the application range of the frictional force control.

According to a fifth aspect of the present invention, there is provided a conveying force generating mechanism having a rotating body that comes into contact with a paper sheet and a drive unit that drives the rotating body, and a conveying inhibiting force that presses the paper sheet against the rotating body. A mechanism and a vibration mechanism for transmitting reciprocating vibration to the conveyance stopping force generating mechanism are provided to control the energy or vibration frequency applied to the vibration mechanism, so that the conveyance stopping force can be controlled without using a complicated control mechanism. The conveyance inhibiting force of the generating mechanism can be changed, thereby having an effect that the sheet separating action can be more effectively promoted.

According to a sixth aspect of the present invention, there is provided a conveying force generating mechanism having a rotating body which comes into contact with a sheet and a driving unit for driving the rotating body, and a conveying inhibiting force for pressing the sheet against the rotating body. A mechanism, a vibration mechanism for transmitting reciprocating vibration to the transport inhibiting force generating mechanism, and a sheet detector provided downstream of the transport inhibiting force generating mechanism in the sheet transporting path. The vibration generating action of the vibration mechanism is gradually activated from a constant state, and the vibration generating action of the vibration mechanism is returned to a constant state after the sheet detector outputs a sheet detection signal. The transport inhibiting force of the inhibiting force generating mechanism can be changed, so that even if paper sheets of different paper quality are randomly transported, any paper sheet is changed at the time when the transport inhibiting force changes according to the paper sheet. Be sure to separate and transport With the possible effect.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a front view of a vibration mechanism.

FIG. 3 is a front view showing the operation of the vibration mechanism.

FIG. 4 is a front view showing a state in which the effect of the vibration mechanism is tested.

FIG. 5 is a vertical side view of a vibration mechanism according to a second embodiment of the present invention.

FIG. 6 is a side view showing the operation of the vibration mechanism.

FIG. 7 is a front view showing a third embodiment of the present invention.

FIG. 8 is a vertical sectional front view of a reverse roller .

9 is a longitudinal side sectional view of the reverse roller.

FIG. 10 is a front view showing a fourth embodiment of the present invention .

FIG. 11 is a front view showing a fifth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 5 paper sheet 6 rotating body 7 conveyance force generation mechanism 8 conveyance prevention force generation mechanism 12 vibration mechanism 13 elastic body 14, 15 electromechanical conversion element 19 vibration mechanism 22 elastic body 24 electromechanical conversion element 30 conveyance force generation mechanism 32 rotator 37 Conveyance inhibiting force generation mechanism 40 Vibration mechanism 41 Elastic body 45 Sheet detector

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shunichi Ando 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (56) References JP-A-4-201933 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 1/00-3/68

Claims (6)

(57) [Claims] 1. A transport force generating mechanism having a rotating body that comes into contact with a sheet and a drive unit that drives the rotating body, a transport inhibiting force generating mechanism that presses the paper sheet against the rotating body, and the transport vibration mechanism for transmitting the reciprocating movement in the blocking force generating mechanism and Ri more <br/> name to put into the vibrating mechanism according to the paper quality of the paper sheet
A sheet separating apparatus wherein energy or vibration frequency is controlled . 2. The sheet separating apparatus according to claim 1, wherein a vibration mechanism is constituted by the elastic body and the electromechanical transducer. 3. Ultrasonic vibration of 20 kHz or more or 500
2. The sheet separating apparatus according to claim 1, wherein a vibration mechanism that generates a low-frequency vibration of less than Hz is used. 4. A roller having a hollow inside as a conveyance inhibiting force generating mechanism, wherein an electromechanical transducer is attached to an inner surface of the roller at a predetermined interval.
The paper sheet separating device according to claim 1. 5. A conveying force generating mechanism having a rotating body that comes into contact with a sheet and a driving unit that drives the rotating body, a conveying inhibiting force generating mechanism that presses the sheet against the rotating body, and the conveying mechanism. A sheet separating method, comprising: providing a vibrating mechanism for transmitting reciprocating vibration to a blocking force generating mechanism, and controlling energy or vibration frequency applied to the vibrating mechanism. 6. A conveying force generating mechanism having a rotating body that comes into contact with a sheet and a driving unit that drives the rotating body, a conveying inhibiting force generating mechanism that presses the sheet against the rotating body, and the conveying mechanism. A vibration mechanism for transmitting reciprocating vibration to the stopping force generating mechanism; and a sheet detector provided downstream of the conveying stopping force generating mechanism in the sheet conveying path, wherein the vibration mechanism vibrates immediately after the start of sheet feeding. A sheet separating method, wherein the generating operation is gradually activated from a constant state, and the vibration generating operation of the vibration mechanism is returned to a constant state after the sheet detector outputs a sheet detecting signal.