JPH0539958U - Printer - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a printing device that does not cause wrinkles or slack on paper. A controller 31 rotates a motor 70 when the paper is fed to the platen 25 and a pin tractor 29 to convey the leading edge of the slip 30 to a position slightly over the paper cutter 48. 70 is reversed to drive the pin tractor 29 in the reverse direction, and the leading edge of the paper is returned to the paper cutter unit 48.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printing device.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, in a printing device such as a credit transaction processing device, for example, in a slip paper feeding device, a slip paper is conveyed by a platen and a tractor.

[0003]

[Problems to be solved by the device]

 However, when the slip paper is cueed using the above-mentioned feeding device, there is a risk that the slip paper may be wrinkled or slack due to the difference in the transport amount between the platen and the tractor.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a printing apparatus that does not cause wrinkles or slack on paper.

[0005]

[Means for Solving the Problems]

 To achieve this object, the printing apparatus of the present invention comprises a motor, a platen driven by the motor to convey a sheet, and a one-way clutch for transmitting to the platen only when the motor rotates in one direction. And a tractor that is driven by the motor to convey the paper together with the platen, and when the paper is cued, the motor is rotated in one direction to drive the platen and the tractor to move the leading edge of the paper to the cued position. And a control means for rotating the motor in the other direction to drive only the tractor in the reverse direction to return the leading edge of the paper to the indexing position. .

[0006]

[Action]

 In the printing apparatus of the present invention having the above-mentioned configuration, the control means rotates the motor when the paper is cueed to drive the platen and the tractor to convey the leading edge of the paper to a position slightly above the cueed position. Then, the motor is rotated in the reverse direction to drive the tractor in the reverse direction and return the leading edge of the paper to the indexing position. When the paper is conveyed in the reverse direction, the platen is not rotated and only the tractor is rotated, so that wrinkles and slack of the paper between the platen and the tractor are extended.

[0007]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In this embodiment, the case where the present invention is applied to the credit transaction processing device 11 will be described.

As shown in FIGS. 2 and 3, the credit transaction processing apparatus 11 of the present embodiment mainly includes a card reader unit 12 for reading data stored in a credit card and the like, and a keyboard for inputting various data. 18, a modem 40, an automatic dialing device 41, a printer 21 as a printing device for printing on a slip, a control unit 31 as a control means for controlling the entire device, and a storage for storing various data and the like. The unit 80 and the display unit 20 are connected, and the modem 40 and the automatic dialing device 41 are connected to the external central processing unit 42 via a telephone line T.

A card insertion portion 16 for inserting a credit card is provided in front of the apparatus (on the right side in FIG. 3), and the card inserted from here is the feed rollers 14a, 14b, 14c and the pressing rollers 15a, 15b, 15c. Is configured to be conveyed to the rear of the apparatus along the card conveyance path 17, and a reading head 13 for reading the data stored in the credit card is provided between the feed rollers 14b and 14c. ing. The card reader unit 12 is configured with the above configuration.

The printer 21 includes a platen 25, a paper pressing roller 26, a carriage 23 that linearly moves in parallel with the platen 25, a dot print head 22 mounted on the carriage 23, and a ribbon cassette 24.

As shown in FIGS. 4 and 5, the paper cassette 28 is detachably attached to the main body device, and the paper cassette lower 33 and the paper cassette rotatably supported by the paper cassette lower 33. It consists of the top 32. A rib 32a, which is a guide for the paper, is attached to the paper cassette 32. Further, inside the pin tractor 29, a tractor drive shaft 38 and a tractor guide shaft 39 for holding and guiding the pin tractor 29, a slip guide plate 34 for guiding the slip 30, and a tension spring 36 when the slip 30 is lost. A lever 35 that is pulled and slides to the left is provided.

A PE sensor 46 is provided on the right end of the lever 35, which means that the slip 30 is present when the PE sensor 46 is pushed by the lever 35, and the lever 35 is located on the left side. When the PE sensor 46 is released after moving to the position, the slip is controlled to be detected. The paper path sensor 45 is attached to the same switch holder 47 as the PE sensor 46, and is located just below the platen 25 to detect the leading edge of the slip 30.

A sheet feeding drive device will be described with reference to FIG. 6. A pinion gear 71 provided on a shaft of a motor 70 is engaged with a first idle gear pulley 72, and a first idle gear pulley 72 and a second idle gear pulley 77 are provided. Are connected by a first timing belt 73, and the first idle gear pulley 72 and the platen pulley 75 are connected by a second timing belt 74. Further, the second idle gear pulley 77 and the tractor gear 76 provided on the tractor drive shaft 38 are engaged with each other. A one-way clutch 78 is fitted to the platen pulley 75, and the shaft of the platen 25 is inserted into the inner diameter portion of the platen pulley 75 so that the driving force is transmitted from the platen pulley 75 to the platen 25 only in the counterclockwise direction.

When the slip 30 is sent in the forward direction, the rotational driving force of the motor 70 is transmitted from the pinion gear 71 to the first idle gear pulley 72, and further to the second idle gear pulley 77 by the first timing belt 73. It is transmitted to the platen pulley 75 by the second timing belt 74. The rotational driving force of the second idle gear pulley 77 is transmitted to the tractor gear 76. Rotation of the platen pulley 75 in the counterclockwise direction rotates the platen 25, and rotation of the tractor gear 76 rotates the tractor drive shaft 38 in the clockwise direction. When the slip sheet is returned in the reverse direction, the motor 70 rotates in the reverse direction and the tractor drive shaft 38 rotates counterclockwise, but the drive force is not transmitted to the platen 25.

Next, the operation will be described.

When the credit card is inserted into the card insertion portion 16, a sensor (not shown) reads it, the feeding rollers 14a to 14c and the holding rollers 15a to 15c convey the card, and the reading head 13 stores it in the credit card. The read data is read.

The modem 40 and the automatic dialing device 41 are connected to the external central processing unit 42, and further, the contents of the transaction by the credit card and the like are inputted from the keyboard unit 18 while observing the display unit 20, and the communication data and the keyboards 18, 19 are inputted. The processing result obtained from the data input from the printer is sent to the printer 21.

Then, the slip 30 in the paper cassette 28 is sent to the printer 21 by the pin tractor 29, the platen 25 and the paper pressing roller 26, and is mounted on the carriage 23 which linearly moves in parallel with the platen 25 in the printer 21. The dot print head 22 prints the transaction processing result on the slip 30 fed so as to be wound around the outer periphery of the platen 25 from above the ribbon pulled out from the ribbon cassette 24. Then, the printed and output slip 30 is cut from the perforations to complete the operation.

When the slip 30 is exhausted, the lever 35 is pulled to the left by the pulling spring 36, so that the PE sensor 46 is released and it is detected that the slip 30 is exhausted. When the slip 30 is lost, the rear end of the paper cassette 28 is lifted and removed from the apparatus main body. Then, after removing the paper cassette 28 from the apparatus main body, the paper cassette upper 32 is rotated and opened, a new slip 30 is loaded, the leading edge of the paper is set on the pin tractor 29, and the paper is again mounted on the apparatus main body.

Next, the cue 30 will be described with reference to the flowchart of FIG. 1 and FIGS.

By pressing a set key (not shown) on the keyboard 18 (step S1, hereinafter simply referred to as S1 and the same applies to the other steps), the motor 70 starts rotating in the clock direction (S2), and the tractor gear 76 is started. The tractor drive shaft 38 rotates clockwise with the rotation of the. At the same time, the platen pulley 75 rotates counterclockwise to rotate the platen 25. The slip 30 is sent toward the printer 21 by the rotation of both of them, and the feed amount at this time is increased by 10 to 20% in the platen as compared with the tractor.

The leading edge of the sheet 30 is inserted below the platen 25, the leading edge of the slip 30 is sandwiched between the platen 25 and the paper pressing roller 26, and is further fed. The tip of 30 is sensed (S3). Since the forward feed amount of the sheet 30 after the paper path sensor 45 is detected is set by the pulse number of the motor 70, the sheet 30 is fed accordingly (S4). At this time, the leading edge of the sheet 30 is fed slightly above the paper cutter 48 (FIG. 5).

Subsequently, the motor 70 rotates counterclockwise and sends the slip 30 in the reverse direction by a certain number of pulses (S5). During this reverse feed, the platen 25 is not driven and is returned by only the feed force of the tractor 29. The reason for such forward / reverse feeding is that when the paper is first fed in the forward direction, after the leading edge of the voucher 30 has passed through the paper pressing roller 26, the voucher 30 is pushed up in a narrow gap, so that the voucher 30 is wrinkled. This is because the paper is slightly lifted from the platen 25 and the amount of paper feed after passing the paper pressing roller 26 is reduced. In the final reverse feeding, the platen 25 is not driven, and only the tractor 29 works to pull back the sheet 30 so that the slip 30 is wrinkled, and the slip amount of the slip 30 closely adheres to the platen 25, the initial feeding amount of the slip 30 is increased. That is, the amount of heading is accurately determined. After the head start, the paper is cut by the operator's hand every time one form is printed, and since the platen is accelerated compared to the tractor, the paper does not float or wrinkle.

As is clear from the above description, in the credit transaction processing device 11 of the present embodiment, it is possible to eliminate the floating and wrinkles of the slip 30 with respect to the platen 25 and set an accurate heading amount. .

The present invention is not limited to the embodiments described in detail above, and modifications can be made without departing from the spirit of the invention. In the present embodiment, the heading method has been described for the printing device mounted on the credit transaction processing device, but it is of course possible to employ it for a general printer.

[0027]

[Effect of the device]

 As is clear from the above description, the printing apparatus of the present invention does not cause wrinkles or slack in the paper.

[Brief description of drawings]

FIG. 1 is a flow chart in the case of removing the beginning of a sheet.

FIG. 2 is a block diagram showing an electrical configuration of a credit transaction processing device.

FIG. 3 is a cross-sectional view of a credit transaction processing device.

FIG. 4 is a configuration diagram of the inside of a paper cassette.

FIG. 5 is a configuration diagram of the inside of a paper cassette.

FIG. 6 is a configuration diagram of a paper feed drive unit.

[Explanation of symbols]

 21 printer 25 platen 29 pin tractor 31 control unit 78 one-way clutch 48 paper cutter unit

Claims (1)

[Scope of utility model registration request] 1. A motor, a platen driven by the motor to convey a sheet, a one-way clutch for transmitting to the platen only when the motor rotates in one direction, a motor driven by the motor, and a platen together with the platen. A tractor that conveys the paper, and when the paper is cueed, the platen and the tractor are driven by rotating the motor in one direction to convey the leading edge of the paper to a position slightly beyond the cueed position, and A printing device, comprising: a control unit configured to rotate the motor in the other direction to drive only the tractor in the reverse direction to return the leading end of the paper to the indexing position.