JP3325759B2 - Paper ejection 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 paper discharge device which is incorporated in, for example, a receipt or ticket issuing device and is used for discharging long recording paper such as a receipt or ticket.

[0002]

2. Description of the Related Art Conventionally, in a device for issuing a receipt, a ticket or the like, printing is performed on a long sheet, the sheet is discharged, and the sheet is cut when the printing is completed.

[0003] This type of issuing device includes a cash dispenser and an information terminal device.
3 (A) shows the appearance. Exterior case 3
In the front panel 304 of the printer 02, a sheet discharge port 306 is provided, and the long sheet 308 is discharged from the sheet discharge port 306 in accordance with a printing operation. The recipient can pick up and receive the sheet 308 discharged from the sheet discharge port 306 with a finger.

FIG. 23B shows the internal structure of the printer. In this printer device, a paper transport path 310 is formed from inside the outer case 302 to the paper discharge port 306. The paper transport path 310 includes a paper transport mechanism 312 and a printing mechanism 314.
And a cutter mechanism 316. The paper transport mechanism 312 is a unit that sends out the paper 308 in synchronization with printing. The paper transport mechanism 312 includes a pair of drive rollers 318 and 320, and each of the drive rollers 318 and
The paper 308 is guided and sandwiched between the sheets 20, and is sent out by its rotation in a pressed state. The printing mechanism 314
A print head 322 and a platen 324 are arranged with the paper transport path 310 interposed therebetween, and printing on the paper 308 is performed by driving the print head 322. The form of printing is paper 3
08, the ink ribbon is unnecessary when pressure-sensitive paper is used, and a coloring medium such as an ink ribbon is required when plain paper is used. Further, the cutter mechanism 316 constitutes an independent unit, and a cutter blade 326 that slides in a direction orthogonal to the transport direction of the sheet 308 is installed inside the unit. This cutter blade 326
Is driven by a sliding drive mechanism. In such a cutter mechanism 316, the sheet 308 being conveyed is cut when the cutter blade 326 slides downward in the drawing.

In such a printer, the paper 308
Is discharged from the paper discharge port 306 while being printed, and after the printing is completed, a predetermined amount of paper is continuously discharged and cut by sliding of the cutter blade 326.

When such a printer is used as a receipt or ticket issuing device, it is expected that the recipient will hold the end of the paper 308 to be sent out with a finger and wait for the completion of printing. It is also expected that the recipient will interfere with the ejection of paper 308. For example, FIG.
An example of a waiting state of the receiver's paper 308 is shown. That is, when the recipient grasps the discharged paper 308 and waits, the conveyance of the paper 308 is hindered, and the paper 308 on the paper conveyance path 310 is bent 328. Such bending of the paper 308 causes unnecessary stress in a direction opposite to the discharge direction of the paper 308. As a result, paper 3
08 is curved in a loop inside the printer apparatus, and a normal discharge operation cannot be performed, so that a jam occurs.

Next, FIG. 25A shows a case where the recipient tries to forcibly pull out the sheet 308 to be discharged. When a tension T is applied to the paper 308, the tension T applies an unnecessary load to the cutting edge of the cutter blade 326 in the cutting direction in a direction orthogonal to the sliding direction F.
When the load is extremely large, the cutting edge 330 of the cutter blade 326 is damaged as shown in FIG. And when the cutting edge 330 is bent,
Also, it becomes impossible to slide and the cutting operation is impaired.

Conventionally, in such a printer, measures have been taken to prevent a recipient from touching the paper 308 until printing or discharging of the paper 308 of a predetermined length is completed. For example, Japanese Utility Model Laid-Open No. 5-2976
There is No. 5 "Printer". In this printer, a cover having a depth corresponding to the length of the paper to be issued is attached to the paper discharge section, and the paper is guided into the cover so that the recipient does not touch the cover. Is to send out the paper.

[0009] Such means have the following problems. When the length of the paper 308 to be issued is changed because the cover protrudes from the printer, the cover itself may be damaged, and the size of the cover corresponds to the paper 308 to be issued. Therefore, a device having a size corresponding to that is required, which results in an increase in the size of the issuing device itself.

[0010] With respect to protective measures by such a cover,
A paper discharge device disclosed in Japanese Patent Application Laid-Open No. 1-181659 and US Pat. No. 5,215,393 has been proposed. Such a paper discharge device is designed to allow the recipient to receive the paper by slacking the paper in the printer until the printing operation is completed in the path on the paper discharging side so that the recipient cannot receive the paper. After cutting the paper, the paper is discharged from the discharge port.

By the way, in such a paper discharge device,
In the case where the receiver intentionally closes the sheet discharge port with a finger and waits, no measures are taken in Japanese Patent Application Laid-Open No. 1-181659, and if the sheet discharge is hindered, a jam occurs. Further, according to US Pat. No. 5,215,393, when paper discharge is obstructed by a discharge port, the paper discharge is abandoned, and the paper kept in the cover is guided downward by a roller. Discharging via another route instead of such a paper outlet has the problem that the recipient cannot receive the paper.

Further, in such a paper discharge device, for example, the path from the printing mechanism to the discharge side becomes long, and a roller is used to discharge the paper. Affect. That is, this type of device is installed both indoors and outdoors, and may be used under adverse conditions of high temperature and high humidity. Standard paper is used for the paper. Even if it is a standard paper, the paper is softened under high temperature and high humidity, or the paper is deformed by pressing of the roller surface at the portion gripped between the rollers in contact. The softened paper causes excessive friction between the paper and the roller or comes into close contact with the roller surface, making it difficult to convey the paper.
The paper having a press wrinkle on the roller surface is curved at the wrinkle portion, so that it is difficult to sandwich the paper between the rollers. Also,
Roll paper tends to have curl and press wrinkles, which hinders pinching between rollers. These can cause jams. In the case of Japanese Patent Application Laid-Open No. 1-181659, a drive lever is used to assist the biting of the sheet into the roller. However, the structure is complicated and causes a jam.

Therefore, the present inventor, when issuing a receipt or the like, keeps the paper being conveyed in a loop state and stores it inside the apparatus until printing is completed, finishes the printing operation, and finishes the paper cutting. Until then, a paper discharge device improved so that the recipient does not touch the paper is proposed.

However, roll paper is usually used in a paper discharge device for looping and storing paper to be discharged, and the curl of the roll paper becomes a problem. That is,
In a roll paper having a small diameter of 3.5 inches or less, since the winding diameter is small, the radius of curvature is small and the winding habit is remarkable accordingly. This is because the loop is stably formed when stored in the apparatus. . However, when the diameter of the roll paper is as large as about 8 inches, the winding habit is weak, the paper is transported in a straight state, and is gripped by the discharge roller. In such a sheet in a straight state, when a loop is formed, its curved portion becomes irregular, causing looseness on an unexpected transport path. As a result, if the looseness occurs in a place other than the paper storage portion, it causes a shift to a jam. The occurrence of such a jam becomes remarkable when the sheet is weakened in a high humidity state.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet discharging apparatus which stabilizes the formation of a loop in the pre-processing of sheet discharge and prevents the occurrence of a jam caused by the loop formation.

[0016]

As shown in FIGS. 1 to 16, a paper discharge device according to the present invention is provided on a printer mechanism (printer device 2) and discharges printed paper (20). A delivery device that transports paper
A stage (paper carrying mechanism 8), a discharge roller for discharging undergoing pre <br/> SL paper that will be conveyed by the conveying means to the sheet discharge port side (28, 30), the space portion in the vicinity of the discharge roller And a paper storage unit (3) for storing the paper to be discharged.
1) and when the paper is discharged, the discharge roller is rotated to
Make sure that the leading edge of the paper is not
After the paper is conveyed, the discharge roller is rotated reversely to
Forming a bend of the paper in the storage unit,
A loop of the paper is formed in the paper storage unit by conveyance.
And a control means (sheet discharge control unit 19) for performing the control. That is, by controlling the discharge roller holding the paper to be discharged to the reverse rotation state, the paper can be bent by the paper storage unit before discharge to generate an appropriate loop and stored. In addition, the paper discharge device of the present invention has the configuration shown in FIGS.
As illustrated in FIG. 16, a paper discharge device attached to a printer mechanism (printer device 2) for discharging printed paper, comprising a transport unit (paper transport mechanism 8) for transporting the paper (20), A discharge roller (28, 30) for receiving the sheet conveyed by the conveying means and discharging the sheet to the sheet discharge port (32), and a sheet provided near the discharge roller for storing the sheet to be discharged Storage unit (31)
When a paper sensor (36) for detecting the sheets discharged to said paper discharge port side through the discharge rollers, the paper
Time of ejection, when the paper is detected in the paper sensor,
Before the paper discharge port by sustained rotation before Symbol discharge roller
The paper is transported by an amount that does not discharge the paper
Stopping the discharge roller by, to grasp the pre SL Paper
Was by pre SL reverses the discharge roller to form the deflection of the paper into the paper stock portion to stop the discharge roller, before
The paper is stored in the paper storage unit by the paper transport of the transport means.
Control means for the loop formation (paper discharge control unit 19)
And characterized in that:

In the paper discharge device of the present invention, during the printing operation, the paper conveyed by the conveyance means reaches the discharge roller via the paper storage unit. The discharge roller receives the sheet and performs a discharge operation, and the discharged sheet is detected by a sheet sensor. A predetermined amount of paper is continuously discharged from the detection of the paper by the paper sensor, and when the predetermined amount of paper is discharged, the discharge roller is stopped. When the discharge roller is rotated backward from this point, the sheet is fed in a direction opposite to the discharge direction. At this time, the reverse feeding by the discharge roller causes the sheet to be transported in the tangential direction of the discharge roller, so that even in the case where the sheet has a curl, the sheet is bent in an appropriate curved direction, and as a result,
An appropriate flexure before the loop is formed in the paper storage unit, which is a precursor to the loop.

Then, the reverse feeding operation of the discharge roller is performed only for a predetermined amount of discharge, and the discharge roller is stopped.
From this point, the printing operation is restarted, and the paper is transported by the transport rollers. As a result, the paper causes an appropriate loop in the paper storage.

Further, in the paper discharging apparatus according to the present invention, the control means keeps driving the discharge roller after the paper is detected by the paper sensor and before the paper is discharged to the paper discharging port. After the discharge of the sheet is continued and the sheet is discharged by a predetermined amount of print lines, the discharge roller is stopped to cause the discharge roller to grip the sheet, and then the discharge roller is printed by the predetermined amount. After forming the bending of the paper on the paper storage unit side by reversing the paper by reversing the line, the discharge roller is stopped, the paper is gripped by the discharge roller, and the printing is performed together with the printing. The sheet is conveyed by the conveying unit to form a loop in the sheet storage unit.

In such a discharging operation, the discharge amount and the reverse feed amount of the paper are linked to the printing operation and correspond to a predetermined amount of printing lines, so that a uniform paper discharging operation can be performed. it can.

Further, in the paper discharge device of the present invention, when the discharge roller is rotated in reverse to reversely feed the paper, the paper discharge device is provided with reverse feed prevention means for preventing the movement of the paper toward the transport means. I do. With this configuration, it is possible to cause the sheet to bend at the loop forming portion when the sheet is fed backward by the reverse rotation of the discharge roller.

Further, the paper discharge device of the present invention, the discharge roller is constituted by at least a pair of rollers, this
One roller of these rollers is the center of rotation of the other roller.
By displacing the center of rotation of the roller toward the transport side of the sheet, the sandwiching angle of the sheet formed by each roller surface of the roller is enlarged. By doing so, the tangential direction of the discharge roller is directed toward the paper storage unit. Therefore, when the discharge roller is rotated in the reverse direction, the paper is reversely fed toward the paper storage unit, which is the tangential direction of the discharge roller. . Therefore, the bending of the sheet is formed toward the sheet storage section, and the looped portion of the sheet can be guided to the sheet storage section.

Further, the back-feed prevention means is constituted by the conveyance roller to be stopped. By doing so, the conveyance roller is in a stopped state at the time of the reverse rotation operation of the discharge roller, so that the reverse feeding of the paper can be prevented, and the fluctuation and deviation between the printing lines can be prevented.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

FIG. 1 is a first embodiment of a sheet discharging device according to the present invention, and shows an outline of an issuing device used for issuing a receipt, a ticket, and the like. The issuing device includes a printer device 2, a cutter device 4, and a paper discharge device 6.

The printer 2 is provided with a paper transport mechanism 8 for transporting print paper and a printing mechanism 10. The paper transport mechanism 8 includes transport rollers 12 and 14, and the transport roller 12 Rotational force is transmitted from a motor 15 as a means via a gear mechanism. The rotation of the motor 15 is controlled by the paper transport control unit 162 of the printer control unit 16. Roll paper 22 is supplied to the transport rollers 12 and 14 as paper 20 to be printed. Further, the printing mechanism 10 is provided with a print head 17 and a platen 18. A print control unit 164 is provided as control means of the printer device 2.

The cutter device 4 is means for cutting the paper 20 after printing, and the cutter blade 24 is driven by a motor 26. The motor 26 has a cutter controller 166.
, The vertical movement of the cutter blade 24 is controlled.

The paper discharge device 6 is means for discharging the paper 20 conveyed from the cutter device 4 side.
Discharge rollers 28 and 30 are provided between the side plates 27 provided at regular intervals, and a looped sheet 20 to be discharged is formed between the discharge rollers 28 and 30 and the transport rollers 12 and 14. A paper storage unit 31 for storing is provided. A paper discharge path 34 is formed between the discharge rollers 28 and 30 and the paper discharge port 32.
Is provided with a paper sensor 36 as means for detecting the arrival or presence of the leading end of the paper 20. Discharge roller 28
, A rotational force is transmitted from a motor 38 as a driving means through a gear mechanism and a torque limiter 40. The rotation of the motor 38 is controlled by the sheet discharge control unit 19.

Next, the printer device 2, the cutter device 4, and the sheet discharge device 6 will be described with reference to FIG. Paper 20
Is transported by the transport rollers 12 and 14 of the paper transport mechanism 8 and guided between the print head 17 of the print mechanism 10 and the platen 18 via the paper transport path 39. The printing operation on the paper 20 is performed in synchronization with the paper transport by the transport rollers 12 and 14.

The paper 20 conveyed together with the printing is conveyed to the paper discharge device 6 through the cutter device 4, and the cutter device 4 has a passage hole 4 through which the paper 20 passes.
2, 44 are formed.

First and second guide plates 46 and 48 are provided between the side plates 27 of the sheet discharge device 6 as means for guiding the sheet 20. The guide plate 46 has a chevron shape, a horizontal portion 50 is formed at an intermediate portion, and inclined portions 52 and 54 are formed before and after the horizontal portion 50.
In FIG. 8, inclined portions 58 and 60 are formed around the curved portion 56.

The inclined portion 52 of the guide plate 46 functions as an introduction portion for guiding the sheet 20 to be conveyed to the horizontal portion 50 side. In order to further enhance the function as this introduction portion, the inclined portion 52 is provided on the upper surface side of the inclined portion 52. Are guide pieces 62 as auxiliary guide means.
Is attached to the upright wall 64 of the sheet discharging device 6, and bridges the sheet conveying path 39 between the sheet discharging device 6 and the cutter device 4.

Then, a space surrounded by the horizontal portion 50 of the guide plate 46, the inclined portion 60 of the guide plate 48, the side plate 27 and the upright wall 64 is formed, and the paper 20 being printed is curved and temporarily stored. A paper storage unit 31 is formed.

The inclined portions 54 of the guide plates 46, 48
Numerals 58 are arranged in parallel, and the parallel space forms the paper discharge path 34 that descends obliquely from the paper conveyance path 39 set horizontally. The end of the sheet discharge path 34 is the sheet discharge port 32.

A drive shaft 6 which receives a rotational force from a motor 38 via a torque limiter 40 is provided on a rear surface of the guide plate 46.
8. A support shaft 70 is provided on the back side of the guide plate 48. The arrangement relationship between the drive shaft 68 and the support shaft 70 is as follows.
The support shaft 70 is disposed with the paper discharge path 34 interposed therebetween, and is displaced toward the paper discharge port 32 with respect to the drive shaft 68. The support shaft 70 is elastically supported by the guide plate 48. This support structure will be described later.

A drive shaft 68 is mounted between the side plates 27 by bearings 69. The drive shaft 68 has a pair of first discharge rollers 28 as shown in FIGS.
Are mounted at regular intervals in the width direction of the paper 20, and a pair of second discharge rollers 30 elastically in contact with the discharge rollers 28 are rotatably supported on the support shaft 70. In order to bring the respective roller surfaces of the respective discharge rollers 28 and 30 into contact with each other, a window 76 for projecting the discharge roller 30 is provided on the guide plate 48, and the discharge roller 28 is provided on the guide plate 46.
Window portions 78 for projecting are formed. That is, the roller surfaces of the discharge rollers 28 and 30 projecting through the windows 76 and 78 are in contact with each other. A motor 38 is connected to the drive shaft 68 via a torque limiter 40 serving as a discharge buffering means for buffering paper discharge. That is, the torque of the motor 38 is transmitted from the drive shaft 68 to the discharge roller 28 via the torque limiter 40. Therefore, the paper 20 is transferred to each of the discharge rollers 28, 3
0 and is conveyed to the paper discharge path 34 in a pressure contact state.

A paper sensor 36 is provided in the paper discharge path 34 as means for detecting that the leading end of the paper 20 has arrived. This paper sensor 36 is installed on the back side of a guide plate 48 and its detection surface is guided by a guide. It is directed from the window 82 of the plate 48 to the sheet discharge path 34. This paper sensor 36
For example, it is constituted by optical detection means, includes a light emitting element and a light receiving element, and outputs light from the light emitting element to the paper discharge path 34.
, And the presence or absence of the reflected light can be detected by receiving the reflected light from the paper 20 with the light receiving element.

Next, FIG. 5 shows a support structure of the driven discharge roller 30. An appropriate pressure contact state is required between the discharge rollers 28 and 30 in order to feed the paper 20 by pressure.
Therefore, an elastic metal shaft is used for the support shaft 70 of the discharge roller 30.
A locking piece formed by cutting and raising from the guide plate 48 to movably insert the support shaft 70 from the groove 84 of the bearing 83 while movably inserting the support shaft 70 from the groove 84 of the bearing 83 formed in the bearing 83. 86.
As a result, the discharge roller 28 comes into contact with the discharge roller 30 in a press-contact state, and the discharge roller 30 elastically moves within the range in which the support shaft 70 is allowed to move in the bearing portion 83 in accordance with the sheet 20 to be discharged. Can be moved.

FIG. 6 shows a specific example of the structure of the torque limiter 40. Drive shaft 68 of discharge roller 28
Are supported on the side plate 27 via a bearing 69, and the side plate 2
7 project outside. A clutch 88 is fixed to the drive shaft 68. The clutch portion 88 includes a small-diameter portion 90 and a flange portion 92, and a gear 94 is rotatably provided on the small-diameter portion 90. This gear 94 has
A concave portion 96 is formed in the axial direction.
A coil spring 10 for pressing the gear 94 against the wall surface of the flange portion 92 is provided between the clutch 6 and the disk-shaped spring receiver 98 fixed to the small-diameter portion 90 of the clutch portion 88.
0 is inserted. A slip member 102 is attached to the flange portion 92 of the clutch portion 88, and a ring-shaped contact portion 104 formed on the gear 94 by pressure from the coil spring 100 is pressed against the slip member 102. .

In such a torque limiter 40, the torque of the motor 38 is transmitted from the gear on the rotating shaft side of the motor 38 to the gear 94. Normally, coil spring 1
00, the gear 94 and the clutch portion 88 are in frictional engagement, and as a result, the rotation of the gear 94 causes the drive shaft 68 to rotate.
Is transmitted to

However, when a force for preventing rotation is applied to the drive shaft 68 through the discharge roller 28, the stopping force is applied by the pressure of the coil spring 100, the clutch portion 88 and the gear 9.
If the friction force of the gear 94 exceeds the frictional force with the contact portion 104, the gear 94 enters the idle state, and the transmission of the rotational force to the drive shaft 68 is blocked. As a result, the sheet 20 is discharged by the discharge rollers 28 and 30.
Will stop discharging. That is, when the discharge of the paper 20 is obstructed, the stress is transmitted through the paper 20 to the drive shaft 68.
, The gear 94 idles.

Next, FIG. 7 shows a configuration of a control device which forms the printer control unit 16 and the sheet discharge control unit 19. The control unit is provided with a control unit 110 as a unit for controlling each of sheet conveyance, printing, sheet cutting, and sheet discharge. In this embodiment, paper printing and paper discharging are controlled by a single control unit 110.

The control unit 110 is constituted by, for example, a microcomputer in order to cooperate with the host computer 112 and execute various controls. The microprocessor (MPU) 114 as a central processing unit
Various controls and calculations, such as sheet transport control, print control, sheet cutting control, and sheet discharge control, are performed according to the program. The MPU 114 includes a timer 116 as a means for performing time setting and time control.

A ROM 118 and a RAM 120 are provided as main storage means for storing control programs executed by the MPU 114 and data during control or calculation. The ROM 118 is a read-only memory having a control program, a table, and the like, and the RAM 120 is an occasional write memory for storing data and the like in the course of calculation. Although not shown, a storage medium such as a flexible disk may be used instead of the RAM 120 as the auxiliary storage means. In addition, a storage unit attached to the host computer 112 can also be used as an auxiliary storage unit of the control unit 110.

The control section 110 has an input / output unit (I / O) 1 as an input / output means for taking in various input data from the host computer 112 and taking out the control output of the control section 110 to the host computer 112.
22 are provided. This I / O 122 is connected to MPU1
14, and linked to the ROM 118 and the RAM 120 via a bus. A switch or the like for inputting an online operation command from the host computer 112 to the I / O 122 via the switch or the like is connected to the I / O 122.
The description is omitted because it has no direct relation to the sheet discharge control in the present invention.

The I / O 122 includes first, second, third, fourth, and fifth drivers 124, 125, 126, 128, and 1 as means for extracting a control output.
30 are connected. A driver 124 for driving the paper transport mechanism 8 with respect to the printer device 2; a driver 125 for driving the printing mechanism 10;
A driver 126 is a drive output unit for supplying a drive output to the cutter device 4, a driver 128 is a drive output unit for taking out a drive output of the motor 38 for discharging a sheet, and a driver 130 displays an error on a display 132. This is a drive output unit for extracting a display drive output.

Next, the respective operations of paper transport, printing, paper cutting and paper discharging in the issuing device will be described.

FIG. 8 and FIG. 9 show programs showing the respective operations of paper transport, printing, paper cutting and paper discharging.
“a” indicates a connector, and FIGS. 10 to 16 show a state in which the sheet 20 is discharged.

After the power is supplied to the control unit 110 or the reset switch is pressed to reset the control unit 110 and initialize the control unit 110, the printing operation is performed together with the paper conveyance. In step S1, one line is printed.
In step S2, one line of paper is fed. FIG.
Indicates that a printing operation is being performed. The paper 20 reaches the discharge rollers 28 and 30 by such printing and paper feeding.
When the motor 38 rotates in step S3, the discharge rollers 2
The sheet 20 is sandwiched between the sheets 8 and 30 and discharged to the sheet discharge path 34. In step S4, it is determined whether or not the detection is performed by the paper sensor 36.
Steps S1 to S4 are repeated, and after the sheet is detected, the process proceeds to step S5. In step S5, it is determined whether the printing of the i-th row, which is the predetermined row, is completed, and steps S1 to S5 are repeated until the printing of the i-th row is completed.
The process proceeds to step S6 to stop the motor 38. Here, the i-th row is the number of printing lines after the paper 20 is detected by the paper sensor 36, and
Is set within the range not discharged from The setting of such a range is to prevent the recipient from touching the paper 20 in the discharge mode. Thereafter, the printing operation is stopped in step S7, and the transport roller 14 is stopped by stopping the motor 15 in step S8.
Move to FIG. 11 shows this state.

In step S9, the motor 38 is rotated in the reverse direction, and the reverse operation is continued until the paper 20 for the i-th row is reversely fed in step S10. When the reverse feed for i rows is completed in step S10, the process proceeds to step S11,
The motor 38 is stopped. With such an operation, a bending preparation operation is performed as an all-stage operation of the loop in the paper storage unit 31. FIG. 12 shows this state.

In step S12, it is determined whether or not n lines have been printed on the sheet 20 by continuing the printing operation. This determination continues after printing one line in step S13 and feeding one line of paper in step S14 until printing of n lines is completed. As a result, the paper storage unit 31
Then, the paper 20 is looped, and the paper 20 is temporarily stored. FIG. 13 shows the state.

After the n-line printing is completed, the process proceeds to step S15, in which the sheet feeding for m lines is completed, and the sheet is cut in step S16. FIG. 14 shows a paper cut upon completion of printing. After this paper cut, step S1
At 7, the motor 38 is rotated to discharge the paper. The rotation of the motor 38 is continued until a predetermined time elapses in step S18, and after the elapse of the predetermined time, the process proceeds to step S19 to stop the motor 38. As a result, as shown in FIGS. 15 and 16, the sheet is discharged.

Then, the cut paper 20 is issued as a receipt or a ticket to the recipient as a plurality of paper pieces. FIG.
The positional relationship between printing and paper cutting is shown.

The reason why the loop of the paper 20 is properly performed in the paper storage unit 31 in the discharge of the paper is that the paper 20 is transferred to the paper storage unit 3 by the reverse rotation of the motor 38.
1, the sheet 20 is bent in the upward direction of the horizontal portion 50 of the guide plate 46, so that the paper 20 is bent in the reverse direction in the tangential direction of the discharge roller 28. On the other hand, by causing a deflection that promotes looping. By such forced bending, the paper 20 can be formed into a loop regardless of the form of the curl of the paper 20 due to the unwinding of the roll paper 22, that is, regardless of the diameter of the roll paper 22. .

By the way, in this paper discharge device 6,
As the discharge rollers 28 and 30, rollers having a relatively large diameter are used, and as shown in FIG. 18A, the arrangement relationship of the discharge rollers 28 and 30 is such that the central axis thereof is inclined by an angle θ1. Let me. As a result, the discharge roller 2
The opening angle formed by the tangent lines L1 and L2 of 8, 30 is θ2. That is, when the diameters of the discharge rollers 28 and 30 are the same and the inclination angle θ1 is 45 °, the opening angle θ
2 is 90 °.

FIG. 18B shows discharge rollers 28 and 30.
Are set at the same position in the horizontal direction. In this case, the opening angle θ3 formed by the tangents L1 and L2 is 4
5 °, and the opening angles θ2, θ of the discharge rollers 28, 30
3 means that the opening angle is widened by displacing the position of the central axis, that is, by setting the discharge roller 28 forward (θ2> θ3).

By arranging the discharge rollers 28 and 30 in this manner, in the paper discharge device of the present invention, the paper discharge device shown in FIG.
As shown in FIG. 8C, when the curved paper 20 indicated by a two-dot chain line is transported due to the curl of the roll paper 22,
The leading end can be effectively guided between the discharge rollers 28 and 30. In particular, since the discharge roller 28 rotates in the direction indicated by the arrow P (that is, clockwise) and the discharge roller 30 correspondingly rotates in the direction indicated by the arrow Q, the sheet 20 whose leading end contacts the discharge roller 30 Is guided to the discharge roller 28 side by the discharge roller 30. The rotation of the discharge rollers 28 and 30 and the opening angle θ2 of the two together cause the sheet 20 to be guided between the discharge rollers 28 and 30 and to be reliably moved to the sheet discharge path 34 side without causing a jam. Can be discharged.

Further, depending on the arrangement of the discharge rollers 28 and 30, the tangential direction of the discharge rollers 28 and 30 is
When the discharge rollers 28 and 30 are reversed,
The paper 20 is fed back toward the paper storage unit 31 of the guide plate 46, which is the tangential direction of the discharge rollers 28 and 30. Therefore, the bending of the paper 20 is formed toward the paper storage unit 31, and the looped portion of the paper 20 can be reliably guided to the paper storage unit 31.

Next, FIG. 19 shows a case where the sheet discharge is hindered, for example, the sheet discharge port 32 is closed, and FIG. 20 shows the operation thereof. In step S31, for example, when the sheet discharge port 32 is closed and the conveyance of the sheet 20, that is, the discharge of the sheet 20, is prevented, as shown in step S32, the stress acting on the sheet 20 acts on the torque limiter 40. , The torque limiter 40 becomes idle and the discharge rollers 28
Rotation stops. As a result, the discharge of the paper 20 stops. Then, as shown in step S33, when the discharge inhibition of the sheet 20 is released, the release of the stress acts on the torque limiter 40, and as shown in step S34, the state again shifts to the rotation transmitting state, and as shown in step S35. , Paper 20
Is discharged normally.

By providing such a torque limiter 40, a driving force which does not affect the printing accuracy of the printer device 2 can be set on the discharge roller 28 side. Moreover, when the supply speed from the printer device 2 and the paper discharge speed do not match, the discharge force can be absorbed by the torque limiter 40, and the occurrence of a jam can be prevented.

Next, FIG. 21 shows a second embodiment of the paper discharge device of the present invention. In this paper discharge device, the position of the paper sensor 36 is set to the position on the paper discharge port 32 side,
That is, it may be arranged at a position separated from the discharge rollers 28 and 30 by i-line printing, which is the reverse feed amount. With this setting, the sheet 20 can be ejected by the sheet sensor 36 by a length that takes into account the amount of deflection, and reverse feeding can be performed from this point.

FIG. 22 shows the operation in that case, and the connector a leads to a in FIG. In the operation in this case, sheet detection is performed through steps S1 to S4 '. By this paper detection, the paper feed for the reverse feed has been completed, and the motor 38 is stopped in step S5 '. The printing operation is stopped in step S6 ', the motor 15 is stopped in step S7', and the motor 38 is reversed in step S8 '. The reverse feed of the sheet 20 in the above embodiment is performed, and this reverse feed is continued until the reverse feed for i rows is completed in step S9 '. Then, in step S10 ', the motor 38
Is stopped, and the process reaches step S12 in FIG. The following operation is as shown in FIG.

As described above, by setting the position of the sheet sensor 36, the control of the sheet feeding for the i-th row can be simplified, and the sheet feeding for uniform bending can be stably performed.

In the above embodiment, when the paper is fed in reverse, the printing operation is stopped and the transport roller is stopped, and the paper is stopped by the stopped transport roller to stop the paper from moving in the reverse direction. By using such a structure, a deflection is induced to guide a loop formed on a sheet to a predetermined position. However, the present invention is limited to a method in which a conveyance roller is used as a means for stopping the reverse transfer of the sheet. Not something. As the stopping means other than the transport roller, a configuration may be used on the assumption that the transport roller is driven. For example, a stopper member that applies a load to the paper that can stop reverse transport of the paper to the paper transport path May be provided. Similarly, it is possible to cause the sheet to bend, thereby guiding the looping position. As another method, if the reverse feed amount on the discharge roller side is set to be relatively large with respect to the transport amount of the transport roller, that is, the feed amount, the sheet can be bent.

[0065]

As described above, according to the present invention,
The following effects can be obtained. a. It is possible to reliably and smoothly convey the paper that has been deformed due to the curl in the case of using roll paper, the paper that has been deformed due to the pressure contact with the rollers on the conveyance means, or the paper that has been softened by moisture absorption, and perform stable paper discharge. Conventional jam occurrence can be reliably prevented. b. Installed in cash dispensers, information terminal devices, etc. in unmanned stores, it is possible to discharge paper with high reliability. c. It can be used because paper that has been deformed due to curl in the case of using roll paper, deformation due to pressure contact with the rollers on the transport unit, or paper that has been softened by moisture absorption can be transported reliably and smoothly, and can be discharged stably. The range of types of roll paper can be expanded, and costs can be reduced. d. When a sheet is reversely fed by installing a reverse-feed prevention means for preventing the sheet from being reversely fed to the transport roller side,
It is possible to promote the looping of the paper in the paper storage unit and prevent the occurrence of a jam. e. By displacing one of the rollers constituting the discharge roller to the paper discharge port side to increase the pinching angle of the sheet to be discharged, the discharge roller can easily and reliably pinch the sheet to be discharged. In addition, the loop portion of the sheet can be guided to the sheet storage section, and a stable storage state can be realized. f. If the reverse feed prevention means is realized by stopping the transport roller, it is not necessary to take any special means, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a sheet discharge device of the present invention.

FIG. 2 is a cross-sectional view illustrating a sheet discharging device.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a cutaway perspective view showing a paper storage unit and a discharge roller.

FIG. 5 is a diagram illustrating an elastic support structure of a discharge roller.

FIG. 6 is a longitudinal sectional view showing a torque limiter.

FIG. 7 is a block diagram illustrating a control device of the sheet discharging device.

FIG. 8 is a flowchart showing a control program for printing and paper discharge.

FIG. 9 is a flowchart illustrating a control program for printing and paper discharge.

FIG. 10 is a cross-sectional view illustrating the operation of the paper discharge device during printing.

FIG. 11 is a cross-sectional view of a sheet discharging device during sheet conveyance during printing.

FIG. 12 is a cross-sectional view of the sheet discharging device illustrating the reverse feeding of the sheet.

FIG. 13 is a cross-sectional view of the paper discharge device showing a paper storage state during printing.

FIG. 14 is a cross-sectional view of the sheet discharging device showing cutting of the sheet when printing is completed.

FIG. 15 is a cross-sectional view of the sheet discharging device showing sheet discharging.

FIG. 16 is a cross-sectional view of the sheet discharging device showing a completed state of sheet discharging.

FIG. 17 is a plan view showing conveyance, printing, and cutting on a sheet.

FIGS. 18A and 18B show the arrangement of discharge rollers and the biting of a sheet into the discharge rollers, FIG. 18A shows the arrangement of discharge rollers, and FIG. 18B shows the arrangement of other discharge rollers;
FIG. 4C is a diagram illustrating a form in which the paper bites into the discharge roller.

FIG. 19 is a cross-sectional view of the sheet discharge device showing a state in which sheet discharge is inhibited.

FIG. 20 is a flowchart illustrating an operation when sheet discharge is prevented.

FIG. 21 is a cross-sectional view illustrating a second embodiment of the paper discharge device of the present invention.

FIG. 22 is a flowchart showing an operation of the sheet discharging device shown in FIG. 21.

23A and 23B show a conventional printer device, in which FIG. 23A is a perspective view and FIG. 23B is a cross-sectional view showing the internal structure.

FIG. 24 is a cross-sectional view showing a case where a sheet to be discharged is picked up and is on standby.

25A is a cross-sectional view illustrating cutting of a sheet to be discharged, and FIG. 25A is a cross-sectional view illustrating a case where tension is applied to the sheet to be discharged; FIG. It is a figure showing a deformation.

[Explanation of symbols]

 Reference Signs List 2 printer device (printer mechanism) 8 paper transport mechanism (transport means) 12, 14 transport roller 19 discharge control section (control means) 20 paper 28, 30 discharge roller 31 paper storage section 32 paper discharge port 36 paper sensor

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 23/188 B41J 11/66 B41J 15/04

Claims (6)

(57) [Claims] 1. A paper discharge device for discharging the printed sheet is attached to the printer mechanism, and conveying means for conveying the sheet, the paper discharge port side to receive the paper that will be conveyed by the conveying means a discharge roller for discharging, provided in the space portion in the vicinity of the discharge roller, and the sheet storage portion storing the paper to be discharged, when the paper discharge, the paper is pre-rotates the discharge rollers
The paper was conveyed to such an extent that it was not discharged to the paper discharge port.
Then, the discharge roller is rotated in the reverse direction, and the paper is stored in the paper storage unit.
Form the paper deflection, and the paper is conveyed by the conveyance means.
Control means for forming a paper loop in a paper storage unit . 2. A paper discharge device attached to a printer mechanism for discharging printed paper, comprising: transport means for transporting the paper; and receiving the paper transported by the transport means to a paper discharge port side. A discharge roller for discharging, a paper storage unit provided near the discharge roller for storing the paper to be discharged, and detecting the paper discharged through the discharge roller to the paper discharge port side and the paper sensor, when the sheet discharge, and the paper on the paper sensor has been detected
Come, the paper discharge port by sustained rotation before Symbol discharge roller
The paper is discharged by an amount that does not discharge the paper
Is conveyed to stop the discharge roller, thereby stopping the discharge roller to form a deflection before Symbol by reversing the previous SL discharge roller which has gripped the sheet the sheet to the sheet storage portion side, said conveying means Forward to the paper storage section
A sheet discharging device comprising: a control unit configured to form a loop of a recording sheet . 3. The control means, after the sheet is detected by the sheet sensor, before discharging the sheet to the sheet discharge port, continues driving the discharge roller to continuously discharge the sheet, After discharging the paper for a predetermined amount of printing lines,
The discharge roller is stopped to cause the discharge roller to grip the sheet, and then the discharge roller is reversed by the predetermined amount of printing lines to reversely feed the sheet, thereby causing the sheet to move toward the sheet storage unit side. After the bending of the paper is formed, the discharge roller is stopped, the paper is gripped by the discharge roller, and the paper is conveyed by the conveyance means together with the printing to form a loop in the paper storage unit. 3. The sheet discharging device according to claim 2, wherein Wherein when causing the reverse feed the paper by reversing the discharge roller, according to claim 1 or 2, wherein further comprising a reverse feed preventing means for preventing movement of the sheet to the conveying means side Paper ejection device. Wherein said discharge roller is constituted by at least a pair of rollers, the center of rotation of one roller of these rollers
By displacing the rotation center of the other roller toward the paper transport side, the roller is formed on each roller surface of the roller.
Paper discharge device according to claim 1 or 2, wherein the obtained by enlarging the pinching angle of that paper. 6. The sheet discharging device according to claim 4, wherein said reverse feed preventing means is constituted by a conveying roller to be stopped.