KR100622363B1 - Medium conveying mechanism, medium conveying apparatus and medium conveying method - Google Patents

Abstract

The simple configuration provides a technique for reliably correcting the tilting of the media.

The resin roller 3 and the rubber roller 4 are supported on the same shaft 2. Compared with the rubber roller 4, the resin roller 3 is large in diameter and small in surface friction coefficient. The tip of the medium is aligned in such a manner that only the resin roller 3 contacts the medium. Subsequent conveyance becomes a form which makes the resin roller 3 and the rubber roller 4 contact a medium together by applying a larger pressure to the shaft 2 toward the pinch roller 6.

Description

MEDIUM CONVEYING MECHANISM, MEDIUM CONVEYING APPARATUS AND MEDIUM CONVEYING METHOD}

1 is a circuit configuration diagram of a bankbook and journal printer equipped with a media conveying apparatus according to the present embodiment.

Fig. 2 is a view for explaining the appearance and configuration of a bankbook / slip printer equipped with a medium conveying apparatus according to the present embodiment.

3 is a view for explaining the operation of the conveying system of the medium conveying mechanism according to the present embodiment (first operation).

4 is a view for explaining the operation of the conveying system of the medium conveying mechanism according to the present embodiment (second operation).

5 is a view showing a conveying roller supported on a shaft.

It is a figure which shows a conveyance mechanism and a stopper.

It is a figure explaining the support method of the shaft to which a conveyance roller is attached (the first of them).

It is a figure explaining the supporting method of the shaft to which a conveyance roller is attached (the 2nd).

It is a figure explaining the mechanism which transmits power to a shaft.

10 is a view showing a state in which a shaft to which a conveying roller is attached is supported.

It is a figure explaining the mechanism for applying pressure to the shaft to which a conveyance roller is attached.

It is a figure explaining the cam motor and its operation | movement for applying pressure to the shaft to which a conveyance roller is attached.

FIG. 13 is a view for explaining a lever through which power is transmitted from a cam motor (first of which).

FIG. 14 is a view for explaining a lever in which power is transmitted from a cam motor (second of which).

It is a figure explaining the pressurization relationship of the state of a cam motor and the shaft with which a conveyance roller is attached.

It is a figure which shows the specific example of the conveyance roller supported by the shaft.

It is a figure explaining the structure of the conveyance roller and its assembling method.

It is a figure explaining the inside of the assembled conveyance roller.

It is a figure explaining the arrangement | positioning of the sensor provided in the vicinity of a conveyance roller.

20 is a flowchart of media processing.

Fig. 21 is a diagram showing a conventional configuration for performing tip alignment of a medium and subsequent conveyance.

<Description of the symbols for the main parts of the drawings>

1: Printer

2: shaft

3: resin roller

4: rubber roller

5: leaf spring

6: pinch roller

7: conveying roller

8: medium

9: first sensor

10: conveying mechanism

11: stopper

13: second sensor

31: recess

32: convex

51: bearing

52: spring

53: pressure lever

54: cam motor

56: cam

57: Stepping Motor

58: lever

The present invention relates to a technique for conveying a medium along a conveyance path.

In a slip printer which uses a passbook, a slip, or the like as a medium to be printed, a mechanism is required to prevent the medium from being inserted inclined with respect to the printing head which prints at the time of printing and inclined with respect to the medium. Therefore, as a prior art, it is comprised including the polygon roller 100, the stopper 111, the conveyance roller 107, and the pinch roller 106 like FIG. 21, and is comprised by the polygon roller 100 and the stopper 111, and A printer having a mechanism using the transfer roller 107 and a pinch roller 106 opposed thereto is disclosed (for example, Patent Documents 1 and below). 2).

Patent Document 1: Japanese Patent No. 2888251

Patent Document 2: Japanese Patent No. 3349922

Referring to Fig. 21, a mechanism related to tip alignment and conveyance of a conventional printer will be described. As shown in Figs. 21A and 21B, when the front ends are aligned, the conveying roller 107 is retracted from the conveying path so as not to contact the medium, and in this state, the medium 108 is a polygonal roller. It is conveyed toward the stopper 111 by 100. The polygonal roller 100 is comprised from the flat part and the square part, and rotates to the arrow direction of a figure. A plurality of polygonal rollers 100 are arranged side by side in the crossing (width) direction of the conveyance direction of the medium 108. When the planar portion of one polygonal roller 100 faces the medium 108, the phases of each polygonal roller 100 are in such a way that each portion of the other polygonal roller 100 is in contact with the medium 108. Is changed.

Large conveyance force is transmitted to the medium 108 when each part of the polygonal roller 100 is in contact (refer FIG. 21 (b)), and when the flat part opposes (refer FIG.21 (a)) It is small even if it is not delivered or delivered. Since a plurality of such rollers 100 are arranged in the width direction, the conveyance force is transmitted to the medium 108 at different timings in different places in the width direction. The part which contacted the stopper 111 is not conveyed earlier. Thereby, even if the medium 108 conveyed toward the stopper 111 by the polygon roller 100 is inclined, it is conveyed continuously even after contacting the stopper 111, and the front end contacts the stopper 111 as a whole. The slope progression is modified to be.

When the conveyance by the polygonal roller 100 which inclines advancing is corrected like this is complete | finished, as shown in FIG.21 (c), the conveyance roller 107 is returned to a conveyance path, and the stopper 111 is Retreat from the conveyance path. As a result, the medium 108 is in a state sandwiched between the conveying roller 107 and the pinch roller 106, and then conveyed by these rollers 106 and 107, and processing such as printing is performed.

The thickness of the medium inserted into the slip printer varies from, for example, having a thickness such as a bankbook to a single sheet of paper. In the above-described tip alignment mechanism, even when the tip alignment is performed by inserting a thin medium such as a sheet of paper, the media and the polygonal roller are not always in contact with each other. For this reason, the bending of the medium and the like can be avoided by applying the conveying force for a long time.

In the above-described slip printer, the polygonal roller is provided separately from the conveying roller. These can be retracted from the conveyance path together. For this reason, the structure is complicated. This hindered the downsizing of the slip printer.

It is an object of the present invention to provide a technique capable of reliably correcting the inclination of a medium with a simple configuration.

The media conveyance mechanism of the present invention includes one or more first rollers used for conveying the media, a plurality of second rollers having a larger diameter and a smaller surface friction coefficient at the portion in contact with the media than the first roller, and the first roller. And a shaft for supporting the roller and the second roller, and support means for movably supporting the shaft in a direction crossing the conveying direction of the medium.

On the other hand, it is preferable that the said 2nd roller is supported by the shaft via the elastic member. It is preferable that the elastic member is attached to the first roller so that the second roller is supported by the shaft via the first roller.

The media conveying apparatus of this invention is one or more 1st roller used for conveying a medium, the some 2nd roller with a small diameter, and the surface friction coefficient of the part which contact | connects a medium compared with a 1st roller, and a 1st A shaft supporting the second roller through the elastic member, support means for movably supporting the shaft in a direction crossing the direction in which the medium is conveyed, and against the first roller and the second roller, A third roller disposed, a pressurizing means capable of changing the pressure exerted toward the third roller along the crossing direction with respect to the shaft supported by the support means, and a control means for controlling the pressure applied to the pressurizing means. .

The media conveyance method of this invention prepares the 1 or more 1st roller used for conveyance of a media, and the some 2nd roller with a large surface friction coefficient of the part which contact | connects the said media compared with this 1st roller, and said 2nd By conveying the medium by a roller, the inclination of the medium is corrected by using a stopper for correcting the inclination of the medium, and the medium is conveyed by the first roller. Let's do it.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will now be described in detail with reference to the drawings.

1 is a circuit configuration diagram of a bankbook and journal printer equipped with a media conveying apparatus according to the present embodiment. The printer 1 uses a passbook, a slip, etc. as a medium to be printed, and the CPU 70, the ROM 71, the RAM 72, the reader / writer 74, and the interface 73 to which the reader / writer is connected. Image scanner 76, interface 75 to which this image scanner is connected, print head 78, print head driver 77 for driving the print head, communication interface 79, sensor driver 80, sensor The group 85, the operation unit 81, the motor drive unit 82, the motor group 86, the solenoid drive unit 83, the solenoid group 84, the MS unit 22 and the interface 87 to which the unit is connected It is configured to include.

The CPU 70 executes the control program stored in advance in the ROM 71 using the RAM 72 as a work, thereby controlling the entire bankbook / slip printer (hereinafter referred to as a "printer") 1. The ROM 71 also stores various control data in advance.

The reader / writer 74 communicates with the IC mounted on the IC card to read or record information. The image scanner 76 is for reading an image of a medium such as an inserted bankbook or slip. The CPU 70 controls the reader / writer 74 and the image scanner 76 through the interfaces 73 and 75. Printing to the medium is executed by driving the printing head 78 by the printing head driver 77.

The sensor group 85 is composed of various sensors mounted on the printer 1. Most of the sensors constituting the sensor group 85 are optical sensors having light emitting elements and light receiving elements. The sensors constituting the sensor group 85 are driven by the sensor drive unit 80, and the detection results by these sensors are notified to the CPU 70. The motor group 86 is composed of various motors mounted on the printer 1. These motors are driven by the motor drive 82. The solenoid group 84 is also comprised with the various solenoids mounted in the printer 1 similarly. These solenoids are driven by the solenoid drive section 83. The CPU 70 drives the motor constituting the motor group 86 and the solenoid constituting the solenoid group 84 through the motor driver 82 and the solenoid driver 83.

The operation part 81 is equipped with various switches etc. which a user makes an operation object, for example. The communication interface 79 is for communicating with a host computer, for example.

The external appearance of a bankbook and journal printer is shown to FIG. 2A, and the schematic sectional drawing is shown to FIG. 2B.

Inside the printer 1, as shown in Fig. 2B, the reader / writer 74, the MS unit 22, the conveyance mechanism 10, the print head 78, and the second conveyance mechanism 24 are shown. ), An image scanner 76 and an automatic page turning mechanism 26 are mounted.

The medium inserted from the insertion port shown in FIG. 2A is first conveyed by the conveyance mechanism 10. The conveyance mechanism 10 is a mechanism according to the present embodiment, and conveys for the purpose of tip alignment and printing of media such as bankbooks and slips. The media is conveyed toward the printing head 78 after the tips are aligned by the conveying mechanism 10 and then printed. The second conveyance mechanism 24 is a mechanism for conveying the medium toward the image scanner 25. The image scanner 76 is prepared to confirm the position at which printing should start on the medium or to check whether the page turning by the automatic page turning mechanism 26 has been properly performed.

As a result of the page turning, when the print end page becomes the next page, after the end of the processing, the start page and the start row data at the time of the next print are recorded in the magnetic stripe such as an account book by the MS unit 22. The MS unit 22 is operation controlled by a control program stored in the ROM 71.

3 and 4 are diagrams illustrating the operation of the conveyance system of the conveyance mechanism 10. This conveyance system is a part which concerns especially conveyance of a medium. This conveying system consists of the some conveyance roller 7 comprised by the shaft 2, the resin roller 3, and the rubber roller 4, the some leaf spring 5, and the some pinch roller 6. As shown in FIG. The leaf spring 5 is for supporting the resin roller 3 to the shaft 2.

The resin roller 3 of the conveyance roller 7 is a roller whose part which contacts a medium is resin. The rubber roller 4 is a roller in which the part which contacts a medium becomes an elastic body, such as rubber | gum, for example. Accordingly, the surface friction coefficient of the portion in contact with the medium is smaller than that of the rubber roller 4 on the resin roller 3 side.

The conveyance roller 7 has the disk shape as a whole. The pinch roller 6 is arrange | positioned so that the conveyance roller 7 may be opposed. As shown in FIG. 5, a total of six conveying rollers 7 are attached to the shaft 2.

Although it mentions later in detail, the shaft 2 is supported so that it can move to the direction which presses the conveyance roller 7 toward the pinch roller 6, and the pressure of 2 steps is applied in that direction. For convenience, a state in which a small pressure is applied is referred to as a depressurized state and a state in which a large pressure is applied to a pressurized state, respectively. The state shown in FIG.3 (a) is a pressure reduction state, and the state shown in FIG.3 (b) is a pressurized state.

The resin roller 3 is larger in diameter than the rubber roller 4. As a result, in the reduced pressure state, as shown in FIG. 3A, only the resin roller 3 is in contact with the pinch roller 6. The resin roller 3 is supported by the shaft 2 via the leaf spring 5. Accordingly, in the pressurized state, as shown in FIG. 3B, the length between the shaft 2 of the resin roller 3 and the pinch roller 6 becomes short, and the resin roller 3 and the rubber roller ( 4) All are in contact with the pinch roller 6. Since the surface friction coefficient of the rubber roller 4 is larger than that of the resin roller 3, when the rubber roller 4 is in contact with the pinch roller 6, the conveyance force of the whole conveying roller 7 is Only the resin roller 3 becomes very large compared with the case where it is in contact with the pinch roller 6. According to this preferred embodiment, the conveying force by the conveying roller 7 can be greatly changed by the pressure applied to the shaft 2. In addition, the difference d of the radius of the resin roller 3 and the rubber roller 4 is d = 0.3-0.5 mm, for example.

Next, a series of operation | movement of the conveyance system from the front-end alignment of a medium to subsequent conveyance is further demonstrated with reference to another figure.

Fig. 4A shows a case where a medium is inserted. As seen from the insertion opening of the medium 8, in front of the conveyance mechanism 10, the 1st sensor 9 for detecting that the medium 8 is inserted is provided. The stopper 11 and the 2nd sensor 13 are provided in the inside of the conveyance mechanism 10 from the insertion opening of the medium 8. 6 shows a relationship between the transport mechanism and the stopper according to the present embodiment. In FIG. 4A, when the sensor 9 detects the insertion of the medium 8, the conveying roller 7 of the conveying mechanism 10 starts to rotate. At this time, it is in a reduced pressure state. The pinch roller 6 rotates by rotation of the conveyance roller 7. Both the first and second sensors 9, 13 are, for example, optical sensors that make up the sensor group 85.

When conveyed by the conveyance mechanism 10 in a pressure-reduced state, as shown in FIG.4 (b), relatively weak conveyance force is applied to the medium 8 by the resin roller 3. As shown in FIG. 5, several conveying rollers 7 are attached to the shaft 2. Thereby, the conveyance force toward the stopper 11 is applied to the other part in the width direction of the medium 8, respectively. For this reason, only the part in which the tip of the conveyance direction does not contact the stopper 11 among the other parts of the width direction is conveyed. As a result, when the medium 8 is inclined, the inclination progression is corrected so that the entire tip thereof contacts the stopper 11. Since the resin roller 3 is in the form of suppressing the medium 8 while applying a weak conveying force during the correction of such inclination progression, that is, during the tip alignment, even if a part of the medium 8 is bent, It is possible to avoid the occurrence of the inclined progression by the elastic force thereby.

Such tip alignment is realized by continuously conveying the predetermined time after detecting the medium 8 by the second sensor 13. After such tip alignment, as shown in Fig. 4C, the depressurized state is shifted to the pressurized state, and suction for printing to the medium 8 is started. By moving to a pressurized state, a strong conveying force, in particular, by the rubber roller 4 is applied to the medium 8. At this time, the stopper 11 is in a retracted state on the conveying path. Such retraction is realized by, for example, driving the solenoids 84a constituting the solenoid group 84 by the solenoid drive unit 83. When the driving is stopped, the stopper 11 returns to the conveying path.

According to this embodiment, the resin roller 3 for tip alignment is attached to the same shaft 2 as the rubber roller 4 for subsequent conveyance. For this reason, compared with the case where these are separately attached to a movable shaft (refer FIG. 21), a mechanical structure becomes much simpler and the structure can be arrange | positioned in a smaller space.

The said reduced pressure state and a pressurized state are implement | achieved as follows.

As shown in FIG. 7, bearings 51 are attached to both ends of the shaft 2. The shaft 2 is pivotally supported by the two bearings 51. A circular hole 55 is formed in the bearing 51 as shown in FIG. 8A, and the bearing is attached to the shaft 2 by inserting the end of the shaft 2 into the circular hole 55. do.

The convex part 32 is formed in the bearing 51, as shown to FIG. 8 (a) and (b). Each bearing 51 moves along the recessed part 31 by inserting the two convex parts 32 into the two recessed parts 31 provided in the frame, for example, as shown in Fig. 8C. Possibly attached. A spring 52 is attached to the bearing 51. The spring 52 is for applying the conveying roller 7 to the pinch roller 6 side via the shaft 2.

As shown in FIG. 9, a pulley is attached to one end of the shaft 2 via a universal joint. Power is transmitted from the conveying motor constituting the motor group 86 to the pulley. By such power transmission, the shaft 2 is rotated. The motor can rotate in either direction. 10 shows a state in which the shaft 2 is attached to the printer 1.

As shown in FIG. 11, a pressing lever 53 for pressing the spring 52 from the upper side is disposed above the spring 52 attached to each bearing 51. These two pressing levers 53 are supported by the shaft 53a, whereby the pressing levers are rotated about the shaft 53a.

Pressing the spring 32 by the lever 53 is performed using the cam motor 54 shown in FIGS. 12A to 12C as a power source. The cam motor 54 attaches the cam 56 to the rotating shaft of the stepping motor 57. As shown in FIG. 6 and FIG. 13A, the cam motor is disposed near one end of the shaft 2.

The lever 58 is disposed in contact with the cam 56. The lever 58 is pivotally supported by the shaft 59, and rotates about the shaft 59 as shown in FIGS. 13B and 13C as the cam 56 rotates.

The lever 58 is provided with the projection 58a as shown to Fig.13 (a) and FIG.14 (b). The end of the projection 58a is located below the end of the lever 53, as shown in Fig. 14B. The end is an end on the side where the spring 32 is not seen in the shaft 53a.

The state shown in FIG. 14B is, for example, the cam motor 54 from FIG. 12B and FIG. 13B from the state shown in FIG. 12C and FIG. 13C. When transitioned to the state shown in FIG. 9, that is, the cam motor 54 is rotated 180 ° clockwise from the initial position. When the cam motor 54 is in the state shown in FIG. 12 (c) and FIG. 13 (c), the side in contact with the cam 56 of the lever 58 is lifted by the cam 56, The projection 58a raises the lever 53. For this reason, the lever 53 rotates around the shaft 53a in the direction which presses the spring 52. FIG. As a result, the shaft 2 is rotated downward by the lever 53 via the spring 52 and the bearing 51, that is, the conveying roller 7 is pressed against the pinch roller 6. Such a pressurized state is a pressurized state, and the non-pressurized state is a reduced pressure state. FIG. 15 has shown the state of the lever 53 when the cam roller 54 is in the state shown to FIG. 12 (a) and FIG. 13 (b). The transition from the pressurized state to the depressurized state is performed by rotating the cam motor 54 in a counterclockwise direction by 180 °, and from the state shown in Figs. 12C and 13C, Figs. 12B and 12C. It returns by returning to the state shown in FIG.13 (b).

FIG. 16: is a figure which shows the specific example of the conveyance roller 7 supported by the shaft 2. As shown in FIG. 17 (a) and 17 (b) are diagrams for describing the configuration and the assembling method of the conveying roller 7.

As shown to Fig.17 (a) and (b), the inside of the resin roller 3 is ring shape of the circular hole part 3a. The rubber roller 4 is comprised with the support part 4a in which the shaft 2 is inserted, and the five leaf springs 5 shown in FIG.4 (a)-(c) in total.

A projection is provided at the end of the leaf spring 5. The conveyance roller 7 is assembled by inserting the projection into the circular hole 3a of the resin roller 3. When the projection is inserted into the other side of the circular hole 3a, the projection works from the outside of the circular hole 3a, so that the resin roller 3 is supported so as not to be separated from the rubber roller 4.

FIG. 18A is a view of the transport roller 7 viewed from the resin roller 3 side. FIG. 18B is a cross-sectional view when the conveying roller 7 is cut along the line B-B shown in FIG. 18A.

As shown in FIG. 18B, the leaf spring 5 is shaped to protrude outward from one point of the rubber roller 4. For this reason, the rubber roller 4 is supported by the leaf spring 5 in the state movable in the radial direction. Therefore, when it moves to a pressurized state from a reduced pressure state, it will change from the state shown to Fig.3 (a) to the state shown to Fig.3 (b).

In addition, in the present Example, although the resin roller 3 is supported by the rubber roller 4 by the leaf spring 5, you may support using the elastic member other than that. For example, rubber may be employed as the elastic member. The resin roller 3 may not be supported by the rubber roller 4 but may be separately supported by the shaft 2.

FIG. 19: is a figure explaining the arrangement | positioning of the sensor provided in the vicinity of the conveyance roller 7. As shown in FIG. As shown in FIG. 19, the four first sensors 9 indicated by 9a-9d are arrange | positioned so that the shaft 2 may line up in the longitudinal direction. A total of eight second sensors 13 are arranged at 13a to 13h in a side by side manner along the longitudinal direction thereof. The first sensors 9a to 9d are used to detect the insertion of the medium 8, and the second sensors 13a to 13h are used to determine the timing for terminating the end alignment.

Fig. 20 is a flowchart of the media processing, showing the flow of processing executed by inserting the media from the insertion opening. The above processing is implemented by the CPU 70 shown in FIG. 1 executing a control program stored in the ROM 71. Hereinafter, with reference to the flowchart of FIG. 20, the process which CPU70 performs in order to perform front-end alignment of the medium 8 and conveyance after that is demonstrated in detail.

First, in step S1, one of the first sensors 9a to 9d waits to detect the medium 8. If any of these sensors senses the medium 8, the process proceeds to step S2. The sensing of the medium 8 by the first sensor 9 is made by blocking the light incident on the light receiving element by the medium 8.

In step S2, the motor drive unit 82 is instructed to rotate the transport motor constituting the motor group 86 in the forward direction, for example. As a result, when the medium 8 starts to be conveyed in the suction direction, the flow advances to step S3 to determine whether any two of the second sensors 13 have sensed the medium 8. If the two or more second sensors 13 do not sense the medium 8, the determination goes to NO and returns to the step S2 above to continue conveying the medium 8. If not, the determination goes to YES and proceeds to step S4.

In step S4, the medium 8 is provided by the distance from the position at which the second sensor 13 senses the medium 8 to the stopper 11 (denoted as "theoretical distance" in the figure) and the predetermined distance α. During the time for conveying, the conveying roller is rotated and then stopped. By rotating the conveying roller during such time, the inclination progression is corrected because the front end of the medium 8 to which the conveying force is applied by the resin roller 3 contacts the stopper 11. Thereafter, the flow advances to step S5.

In step S5, the cam motor 54 in the state shown in FIG. 12B is rotated to the state shown in FIG. The conveyance toward the discharge direction of (8) is started. In the next step S6, wait until all of the second sensors 13 do not sense the medium 8. If all of the front end of the medium 8 has passed to the discharge side at the position sensed by the second sensor 13, none of the second sensors 13 will detect the medium 8, so the flow advances to step S7. do.

In step S7, the conveyance motor is rotated so that the medium 8 stops at the position where the tip is gripped by the conveying roller 7 and the pinch roller 6. In the next step S8, the medium 8 is conveyed in the suction direction by rotating the conveying motor in the reverse direction. After that, the flow advances to step S9 to determine whether any two of the second sensors 13 have sensed the medium 8. If the two or more second sensors 13 do not sense the medium 8, the determination is NO, and the flow returns to step S8 to continue conveying the medium 8. If not, the determination goes to YES and proceeds to step S10.

In step S10, it is determined whether the amount of deviation of the timing at which the second sensor 13 has sensed the medium 8, respectively, is less than or equal to a predetermined value in the positional relationship therebetween. If the amount of deviation is less than or equal to the predetermined value, the determination is YES, and the process proceeds to step S11, and since the inclination of the medium 8 is within the allowable range, the process for printing the medium 8 is continued. After executing the processing, the series of processing ends. If not, the determination is made to NO, and the flow proceeds to step S12, whereby the carrier motor is rotated in the reverse direction to discharge the medium 8 out of the device, return it, and request a reset. The series of processing then ends. On the other hand, the request for resetting is made by, for example, displaying a message for notifying the display device (not shown).

As described above, in this embodiment, after the tip alignment is performed, it is checked whether the inclination of the medium 8 is within the allowable range, and when it is confirmed that the inclination of the medium is not within the allowable range, the device 8 is mounted. It's about to drain out immediately. Accordingly, even if the tip alignment is performed, problems such as jams are reliably avoided by conveying the medium 8 in the suction direction in which the tilting is not within the allowable range.

In addition, the Example to which this invention is applied is not limited to what was mentioned above, It can be variously modified.

(Book 1)

At least one first roller used for conveying the medium,

A plurality of second rollers having a diameter larger than that of the first roller and having a small surface friction coefficient at a portion in contact with the medium;

A shaft supporting the first roller and the second roller;

And support means for movably supporting the shaft in a direction crossing the conveying direction of the medium.

(Supplementary Note 2)

The medium conveyance mechanism according to note 1, wherein the second roller is supported by the shaft via an elastic member.

(Supplementary Note 3)

The said 2nd roller is supported by the said shaft via the said 1st roller by attaching the said elastic member to the said 1st roller, The medium conveyance mechanism of the note 2 characterized by the above-mentioned.

(Appendix 4)

At least one first roller used for conveying the medium,

A plurality of second rollers having a diameter larger than that of the first roller and having a small surface friction coefficient at a portion in contact with the medium;

A shaft supporting the first roller and supporting the second roller through an elastic member;

Support means for movably supporting the shaft in a direction crossing the direction in which the medium is conveyed;

A third roller disposed to face the first roller and the second roller,

Pressurizing means capable of changing the pressure exerted toward the third roller along the crossing direction with respect to the shaft supported by the support means;

And a control means for controlling the pressure to be applied to the pressurizing means.

(Appendix 5)

The control means is adapted to apply pressure to the shaft by the pressing means to contact only the second roller with the medium when correcting the tilting of the medium by the stopper for correcting the tilting of the medium. The medium conveyance apparatus as described in the appendix 4 characterized by the above-mentioned.

(Supplementary Note 6)

Inclination progress detection means for detecting inclination progression of the medium,

And the control means causes the inclination progress detecting means to execute either of stopping the conveyance of the medium and discharging the medium when the inclination progress detecting means detects the inclination progress of the medium whose inclination progress is corrected by the stopper. The medium conveyance apparatus as described in the appendix 4 or 5.

(Appendix 7)

One or more first rollers used for conveying the medium and a plurality of second rollers having a small surface friction coefficient of the portion in contact with the medium as compared with the first roller are prepared.

Inclination progress correction of the medium using the stopper for tilt progress correction of the medium is carried out by conveying the medium by the second roller,

The medium conveyance method characterized by conveying by the said 1st roller the said medium in which the inclination advancing was corrected by the conveyance using the said 2nd roller.

The present invention supports a plurality of second rollers larger in diameter than the first rollers and the first rollers, and having a small surface friction coefficient at the portion contacting the medium on the same shaft. Thus, even if the pressure applied to the medium against the shaft is the same, the conveying force applied to the medium is different when the second roller is brought into contact with the medium and when the first and second rollers are brought into contact with the medium together. The case where only the second roller is in contact is smaller than the case where both rollers are in contact with each other. For this reason, an appropriate conveyance force can be applied to a medium according to a situation. As a result, the tip alignment of the medium (correction of inclination of the slant) and subsequent conveyance can also be appropriately performed by using a roller supported on the same shaft, compared with the case of performing these by a roller supported on a separate shaft. The configuration is very simple. By simplifying the configuration, miniaturization is also facilitated.

Claims (5)

At least one first roller used for conveying the medium, A plurality of second rollers having a diameter larger than that of the first roller, and having a small surface friction coefficient at a portion contacting the medium; A shaft supporting the first roller and the second roller; Support means for movably supporting the shaft in a direction crossing the conveying direction of the medium And a medium conveying mechanism. The medium conveyance mechanism of Claim 1 in which the said 2nd roller is supported by the said elastic member via the elastic member. 3. The medium conveyance mechanism of claim 2, wherein the elastic member is attached to the first roller, and the second roller is supported by the shaft via the first roller. At least one first roller used for conveying the medium, A plurality of second rollers having a diameter larger than that of the first roller and having a small surface friction coefficient at a portion in contact with the medium; A shaft supporting the first roller and supporting the second roller via an elastic member; Support means for movably supporting the shaft in a direction crossing the direction in which the medium is conveyed; A third roller disposed to face the first roller and the second roller; Pressurizing means capable of changing the pressure exerted toward the third roller along the crossing direction with respect to the shaft supported by the support means; Control means for controlling the pressure to be applied to the pressurizing means A medium conveying apparatus, comprising a. Preparing one or more first rollers used for conveying the medium, and a plurality of second rollers having a large surface friction coefficient of a portion in contact with the medium as compared with the first roller; Correcting the inclination of the medium by using the stopper for correcting the inclination of the medium by conveying the medium by the second roller; Conveying, by the first roller, the medium whose tilting is corrected by the conveying using the second roller; Media conveyance method comprising a.

Images