JP2702396B2 - Paper transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying apparatus capable of reversing the conveying direction of a single sheet in a forward or reverse direction and discharging the sheet to the same conveying outlet.

[0002]

2. Description of the Related Art FIG. 5 is a front view showing an operation state of an example of a conventional sheet conveying apparatus, FIG. 6 is a front view showing another operation state of the example of FIG. 5, and FIG. It is a front view which shows another operation state.

A conventional sheet conveying apparatus capable of reversing the conveying direction of a single sheet in the forward or reverse direction and discharging the same to the same conveying outlet is, as shown in FIG. (Large-diameter grip roller) 50 and this large-diameter roller 5
Rollers 3 to 5 which contact the outer periphery of the sheet 0 and convey the sheet 40 with the large-diameter roller 50 sandwiched therebetween, and rollers 6 which convey the sheet 40 conveyed to the conveyance inlet 30 to the position of the roller 3. And 7, guides 13 and 14 for guiding the paper sheet 40 at this time, and a guide such that the paper sheet 40 conveyed between the large-diameter roller 50 and the guide 14 is conveyed along the large-diameter roller 50. A guide 15 that guides the sheet 40 conveyed between the large-diameter roller 50 and the guide 15 toward the junction 31, and sandwiches the sheet 40 conveyed to the junction 31. Conveying belts 11 and 12 that convey toward the conveying outlet 32, rollers 7 and 9 that wind and drive the conveying belt 11, rollers 8 and 10 that wind and drive the conveying belt 12, and a tip of a guide 13 And the large-diameter roller 50 Provided by the sensor to a gate 17 which is biased toward the guide 14 by a spring 18, provided between the low <br/> La 4 and the roller 5 for detecting the passage of a paper sheet 40 22 and 23, sensors 24 and 25 provided at positions where the conveyor belts 11 and 12 come into contact with each other to detect the passage of the paper sheet 40, and a large-diameter roller 50
A motor 54 for driving the rotation of the motor 5, a timing pulley 51 mounted on the shaft of the large-diameter roller 50, and a motor 5
A timing pulley 52 attached to the shaft 4; and a timing belt 53 wound around the timing pulley 51 and the timing pulley 52 and transmitting the rotation of the motor 54 to the large-diameter roller 50.

[0004] The operation of the paper sheet transport apparatus configured as described above is performed when the paper sheet 40 is transported in the forward direction, that is, when the paper sheet 40 is transported in the forward direction.
The paper sheet 40 (arrow C) conveyed to the conveyance inlet 30 is directly transferred along the guides 14 and 15 to the large-diameter roller 50.
Transport outlet 32 by passing through a confluence 3 1 is conveyed around the
When discharged, as shown in FIG. 5, and conveys the paper sheet 40 which has been conveyed to the transfer inlet 30, by Russia over La 6 and 7 to the position of the roller 3 while pressing down the front end of the gate 17, the motor 54 The large-diameter roller 50 and the large-diameter roller 50 rotating in the direction of arrow G by the (rotation direction arrow K)
The roller 3 is rotated along the guide A by the roller 3 and is conveyed along the guide 14 to the position of the roller 4. Subsequently, the roller 4 (rotational arrow A) and the large-diameter roller 50 are moved along the guide 15 by the roller 5. And the roller 5 (rotational direction arrow A) and the large-diameter roller 50 join the lower part of the guide 16 and the conveyor belt 12 at the junction 3
Convey to 1 Sheet 4 conveyed to junction 31
0 is transported to the transport outlet 32 while being sandwiched between the transport belts 11 and 12, and is discharged outside (arrow D).

When the paper sheet 40 is transported in the reverse direction, that is, in the direction of returning to the gate 17, the transport outlet 32
As shown in FIG. 6, when the leading end of the paper sheet 40 reaches the sensors 22 and 23 and the sensors 22 and 23 detect it, the rotation of the motor 54 is stopped. Thereby, the large-diameter roller 50 and the rollers 3 to
5 also stops, and the conveyance of the paper sheet 40 is interrupted.

Subsequently, as shown in FIG. 7, the rotation direction of the large-diameter roller 50 is reversed by rotating the motor 54 in the direction of arrow M (the direction of arrow H), and the large-diameter roller 50 and the rollers 4 and 3 (rotation) are rotated. Paper sheet 40 with direction arrow B)
To the gate 17. The paper sheet 40 that has reached the position of the gate 17 passes through the space between the gate 17 and the upper part of the guide 16 and is transported to the confluence point 31.
The sheet is nipped between 1 and 12 to be conveyed toward the conveyance outlet 32 and discharged outside (arrow D).

At this time, the sensors 24 and 25
When the passage of the trailing edge is detected, the rotation of the motor 54 is stopped, and then the motor 54 is again rotated in the direction of arrow K (see FIG. 5) to prepare for the conveyance of the next sheet.

[0008]

The above-described conventional paper sheet transport apparatus can discharge the paper to the same transport outlet while transporting the paper sheet in the forward direction and the reverse direction. This makes it possible to align the front and back of a paper sheet with mixed front and back.However, since the large-diameter roller is driven by a motor via a timing pulley and a timing belt, many parts are required, and the apparatus is also difficult. It has the disadvantage of becoming larger. In addition, when reversing the transport direction of the paper sheet, a component having a large inertia must be stopped and driven in the opposite direction.

[0009]

According to a first aspect of the present invention, there is provided a paper sheet transporting apparatus comprising: an annular vibrating portion formed of piezoelectric ceramics and having an inner peripheral portion having an electrode composed of a plurality of electrode groups; A plurality of rollers that rotate as a unit, the electrodes of the vibrating section have a plurality of groups of electrodes that are a group of the same number of a plurality of equally divided electrode sections. The electrode portions are sequentially arranged one by one, and a sine wave signal whose phase is sequentially shifted by the same angle in the same direction is sequentially input to each set of the electrode groups, so that the circumference of the vibrating portion is changed. Control to generate a bending vibration that progresses in one of the directions and change the direction in which the phase of the sine wave signal is shifted, thereby reversing the rotation direction of the roller and setting the paper transport direction to the forward direction or the reverse direction. And to perform A device comprising: a rotation speed detection unit that detects the rotation speed of a roller; and a control unit that controls a rotation speed of the roller by controlling a sine wave voltage applied to an electrode group of a vibrating unit based on information from the rotation speed detection unit. It is.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a front view showing an operation state of the embodiment of FIG. 1, and FIG.
FIG. 4 is a front view showing another operation state of the embodiment of FIG. 1, and FIG. 4 is a front view showing still another operation state of the embodiment of FIG.

In FIG. 1, a vibrating portion 1 is formed of a piezoelectric ceramic and has an annular shape, and is a group (group) of individual electrodes 2a to 2d equally divided on an inner peripheral surface.
A plurality of electrode groups 2A to 2D (the whole is referred to as an electrode 2, and each of the electrode groups 2A to 2D
d). This electrode group 2A-2
By inputting a sine wave signal whose phase is sequentially shifted by the same angle to D, a bending vibration (referred to as a traveling wave) traveling in one circumferential direction of the vibrating portion 1 is generated. Can be. The rollers 3 to 5 have the same configuration and function as the roller of the conventional example in FIG. 5 and are in contact with the outer periphery of the vibrating section 1. The roller 3 is provided with a rotation number detecting unit 19, and the roller 3 detected by the rotation number detecting unit 19 is provided.
Is transmitted to the control unit 20. The control unit 20 controls a sine wave signal applied to the electrode 2 via the driver 21 based on information from the rotation speed detection unit 19. Components other than those described above, that is, rollers 6 to 10,
Conveyor belts 11 and 12, guides 13 to 16, gate 1
7, the spring 18, and the sensors 22 to 25 are the same as the conventional example of FIG.

The four electrode groups 2A to 2D provided on the inner peripheral surface of the vibrating part 1 form a group consisting of the corresponding electrode parts 2a to 2d.
When a sine wave signal having a phase that differs by degrees is given via the driver 21, a bending vibration (a traveling wave) that travels in one direction is generated on the outer periphery of the vibration unit 1. The rollers 3 to 5 are rotated by the traveling wave, so that the paper sheet 40 conveyed between the vibrating unit 1 and the rollers 3 to 5 rotates in the rotation direction of the rollers 3 to 5,
That is, the traveling wave is sent in the traveling direction.

Next, the operation of the paper sheet transport apparatus configured as described above will be described.

When the paper sheet 40 is transported in the forward direction, that is, the paper sheet 4 that has been transported to the transport entrance 30 (arrow C).
0 is conveyed around the vibrating section 1 along the guides 14 and 15 as it is to pass through the junction 30 and is discharged to the conveyance outlet 32, as shown in FIG. Rollers 6 and 7 for transporting paper sheet 40
Roller 3 while pushing down the tip of gate 17
To the position. At this time, for the electrode groups 2A to 2D provided on the inner peripheral surface of the vibrating part 1, the electrode groups 2A: sinwt, 2B: coswt, 2C: -sinwt,
When a sine wave signal having a phase of D: -coswt is sequentially shifted by 90 degrees is given, a traveling wave indicated by an arrow E is generated on the outer periphery of the vibrating portion 1. Since the rollers 3 to 5 rotate in the direction of arrow A due to this traveling wave, the paper sheet 40 conveyed to the position of the roller 3 is sequentially conveyed along the guides 14 and 15 and sent to the junction 31. Paper 4 sent to the junction 31
0 is conveyed toward the conveyance outlet 32 while being pinched by the conveyance belts 11 and 12, and is discharged outside (arrow D).

When the paper sheet 40 is transported in the reverse direction, that is, transported in the direction of returning to the gate 17, the transport outlet 32
3, when the tip of the paper sheet 40 reaches the sensors 22 and 23 and the sensors 22 and 23 detect it, a sine wave signal for each of the electrode groups 2A to 2D is output as shown in FIG. Stop supplying. As a result, the generation of the traveling wave of the vibration unit 1 is stopped, the rotation of the rollers 3 to 5 is also stopped, and the conveyance of the paper sheet 40 is interrupted.

Subsequently, as shown in FIG. 4, for the electrode groups 2A to 2D of the vibrating part 1, the electrode groups 2A: sinwt, 2B: -coswt, 2C: -sinwt, 2C:
D: A sinusoidal signal having a phase of coswt sequentially shifted by -90 degrees is provided. As a result, a traveling wave indicated by an arrow F is generated on the outer periphery of the vibrating section 1, and the traveling waves cause the rollers 3 to 5 to rotate in the direction of the arrow B to convey the paper sheet 40 toward the gate 17. The paper sheet 40 reaching the position of the gate 17 is the gate 1
The paper is conveyed to the junction 31 through the space between the guide 7 and the guide 16, further conveyed to the conveyance outlet 32 by being nipped by the conveyance belts 11 and 12, and discharged outside (arrow D).

At this time, the sensors 24 and 25
When it detects that the rear end has passed, the supply of the sine wave signal to the electrode groups 2A to 2D is stopped, and then the electrode groups 2A to 2D are returned to the same state as in FIG. 2A: sinwt, 2B: coswt, 2C: -sinwt, 2
D: A sine wave signal of -coswt is given. As a result, a traveling wave indicated by an arrow E (see FIG. 2) is generated on the outer periphery of the vibrating unit 1, and the rollers 3 to 5 rotate in the direction of the arrow A to prepare for the conveyance of the next sheet.

In the above-described operation, a paper jam may occur when the rotation speed of the rollers 3 to 5 does not match the transport speed of another transport unit. To avoid this, as shown in FIG. The rotation speed detection unit 19 is attached to the roller 3, and a sine wave signal applied to the electrode 2 via the driver 21 is controlled by the control unit 20 based on information on the rotation speed of the roller 3 detected by the rotation speed detection unit 19. Like that. This makes it possible to match the rotation speed of the rollers 3 to 5 with the transport speed of another transport unit, thereby preventing the occurrence of a paper jam.

In this manner, in this embodiment, the sheet can be discharged to the same conveyance outlet while being conveyed in the forward and reverse directions. Although the front and back of the folded paper sheet can be aligned, the number of parts can be reduced and the apparatus can be downsized because a large-diameter roller, a timing pulley, a timing belt, and a motor are not used. Further, when reversing the transport direction of the paper sheet, it is not necessary to stop and restart the parts having large inertia, so that it is possible to respond at a high speed and improve the processing capacity.

[0021]

As described above, the paper sheet transporting device of the present invention has an annular shape formed of piezoelectric ceramics on its inner peripheral surface as a main member for transporting the paper sheet. A vibrating part provided with a plurality of divided electrode groups is provided, and a sine wave signal whose phase is sequentially shifted by the same angle is sequentially applied to this electrode group to advance the vibrating part in one circumferential direction. By generating the waves, there is an effect that the number of components can be reduced and the device can be downsized. Also,
When the transport direction of the paper sheet is reversed, it is not necessary to stop and restart the parts having a large inertia, so that it is possible to respond at a high speed and to improve the processing ability.

[Brief description of the drawings]

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

FIG. 2 is a front view showing an operation state of the embodiment of FIG. 1;

FIG. 3 is a front view showing another operation state of the embodiment of FIG. 1;

FIG. 4 is a front view showing still another operation state of the embodiment of FIG. 1;

FIG. 5 is a front view showing an operation state of an example of a conventional paper sheet transport apparatus.

FIG. 6 is a front view showing another operation state of the example of FIG. 5;

FIG. 7 is a front view showing still another operation state of the example of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration part 2 Electrode 3-10 Roller 11 ・ 12 Conveyor belt 13-16 Guide 17 Gate 18 Spring 19 Rotation speed detector 20 Control part 21 Driver 22-25 Sensor 30 Conveying inlet 31 Confluence point 32 Conveying outlet 40 Paper leaf 50 Large Diameter roller 51 ・ 52 Timing pulley 53 Timing belt 54 Motor

Claims (1)

(57) [Claims] And 1. A vibrating portion of the annular having an electrode composed of a plurality of sets of electrode groups on the peripheral portion is formed of a piezoelectric ceramic, a plurality of rollers rotating in contact with the vibrating portion, the b
A rotation number detecting unit for detecting the rotation number of the roller , wherein the electrodes of the vibrating unit are divided into a plurality of equally divided electrode units.
Has a plurality of sets of electrode groups are Group, each electrode of each electrode group are sequentially arranged one by one, the phase each sequentially same angle with respect to each set of electrode groups Only by inputting a sine wave signal shifted in the same direction, a bending vibration that proceeds in one circumferential direction of the vibrating portion is generated, and the roller is shifted by changing a direction in which the phase of the sine wave signal is shifted. the direction of rotation is reversed have line control for the reversing direction of the sheet with a forward or reverse direction of the rotation
According to the information from the number detection unit, the electrode group of the vibration unit
Control the given sine wave signal to increase the number of rotations of the roller.
A sheet transport device, comprising controlling .