JP2011073184A - Method of controlling conveyance of recording paper of printer, and printer - Google Patents

Abstract

Provided is a printer capable of checking a recording paper portion that is not exposed from a recording paper discharge port when the printer is in a standby state without changing an application program of a connected external device. It is in.
A printer includes a paper feed button. When the paper feed button 11 is operated in the standby state in which the recording paper 21 is positioned at the printing position A (step ST1), the recording paper 21 is predetermined from the printing position A to the downstream side in the recording paper transport direction. The paper is transported by a predetermined transport amount and discharged from the recording paper discharge port 6, and the preprint portion 23 is exposed to the outside from the recording paper discharge port 6 (step ST2). When the paper feed button 11 is operated again (step ST5), the recording paper 21 is transported by a predetermined transport amount upstream in the paper transport direction, positioned at the printing position A, and the printer 1 enters a standby state (step ST5). ST4).
[Selection] Figure 4

Description

  The present invention relates to a printer in which a recording sheet is positioned at a predetermined position on a recording sheet conveyance path after printing and is in a standby state. More specifically, the present invention relates to a recording paper conveyance control method for a printer and a printer that can check a recording paper portion that is not exposed from a recording paper discharge port when the printer is in a standby state.

  A printer that issues a receipt, a predetermined form, or the like performs printing while conveying a recording sheet along a recording sheet conveyance path that reaches a recording sheet discharge port via a printing position by a print head. When printing is completed, the printer positions the recording paper print start target position at the printing position on the recording paper conveyance path, and enters a standby state for the next printing. For example, in the printer described in Patent Document 1, when printing is completed, the cutting target position of the recording paper is positioned at the cutting position by the cutter on the recording paper conveyance path, and then the recording paper is positioned at the printing position. And enter a standby state.

  Here, some roll papers used for issuing receipts or predetermined forms include a preprint portion in which serial numbers and the like are previously printed on recording paper at regular intervals. When a receipt or the like is issued using such roll paper, print data is printed in a print area between adjacent preprint portions on the recording paper. Before issuing a receipt, if necessary, check the serial number of the preprinted part adjacent to the downstream side of the print area in the recording paper conveyance direction, and input it to the accounting processing device connected to the printer. It is like that.

JP 2007-320134 A

  The printer generally includes a paper feed button that feeds the recording paper toward the downstream side while being pressed. Therefore, an operator who issues a receipt using the above roll paper exposes the preprint portion from the recording paper discharge port by operating the paper feed button and feeding the recording paper in the standby state. Check the serial number.

  If the paper is fed to confirm the serial number, the recording paper moves from the printing position to the downstream side in the recording paper conveyance direction, so the recording paper is printed before the next receipt is issued. Must be repositioned into position. On the other hand, it is conceivable to send a command from the accounting processing device to the printer and transport the recording paper upstream to position the recording paper at the print position. Therefore, it is difficult to match the conveyance amount of the recording paper to be conveyed with the conveyance amount of the recording paper manually conveyed downstream by operating the paper feed button, and the recording paper cannot be accurately positioned at the printing position. In addition, it may be possible for the operator to position the recording paper at the printing position after confirming the serial number, but in this case as well, it is difficult to manually position the recording paper at the printing position manually.

  Therefore, in order to confirm the serial number, a first command is transmitted from the accounting processing apparatus to the printer, the recording paper is conveyed downstream from the printing position, and the preprint portion is exposed from the recording paper discharge port. Later, it is conceivable that a second command is transmitted from the accounting processing device to the printer, and the recording paper is conveyed upstream and positioned at the printing position. In this case, it is possible to accurately reposition the recording paper at the printing position, but there is a problem that the cost increases because the application program of the accounting processing apparatus must be changed.

  In view of the above, the problem of the present invention is that the recording paper portion that is not exposed from the recording paper discharge port when the printer is in a standby state without changing the application program of the connected external device. It is an object of the present invention to provide a recording paper conveyance control method for a printer and a printer capable of confirming the above.

In order to solve the above problems, a recording paper conveyance control method for a printer according to the present invention includes:
Print while conveying the recording paper along the recording paper conveyance path to the recording paper discharge port via the printing position by the print head,
When the printing is finished, the recording paper is positioned at a predetermined position on the recording paper conveyance path,
When the operation unit is operated, the recording paper is transported from the predetermined position to the downstream side in the recording paper transport direction until a predetermined transport amount is fed, and the transport state is reached.
When the operation unit is operated again, the recording paper is drawn by the predetermined transport amount upstream in the recording paper transport direction and returned to the state positioned at the predetermined position.

  According to the present invention, when an operation unit such as a paper feed button is operated in a standby state where the recording paper is positioned at a predetermined position on the recording paper conveyance path, the recording paper is conveyed in the recording paper conveyance direction by a predetermined conveyance amount. It will be in the delivery state conveyed to the downstream side. Accordingly, the downstream end portion of the recording paper in the recording paper conveyance direction can be exposed from the recording paper discharge port. When the paper feed button is operated again, the recording paper is pulled upward in the recording paper conveyance direction by a predetermined conveyance amount and returned to a state where it is accurately positioned at a predetermined position, and the printer returns to a standby state. Accordingly, it is possible to check the recording paper portion that is not exposed from the recording paper discharge port when the printer is in a standby state without changing the application program of the connected external device.

  In the present invention, the recording paper includes a preprint portion on which printing is performed at regular intervals. When the recording paper is in the delivery state, the preprint portion on the most downstream side in the recording paper transport direction is the preprint portion. It is desirable to expose from the recording paper outlet. In this way, by operating the paper feed button, the preprint portion can be exposed and confirmed from the recording paper discharge port. Further, by operating the paper feed button again after the confirmation of the preprint portion, it is possible to return the recording paper to the predetermined position.

  In the present invention, in order to return the recording paper to a predetermined position when printing by the next printing command is started, when the recording paper is received in the feeding state, the recording paper is recorded. It is desirable to draw back the predetermined transport amount upstream in the paper transport direction and return to the state positioned at the predetermined position.

  In the present invention, in order to automatically return the recording paper to a predetermined position, when the recording paper measures the elapsed time of the feeding state and the elapsed time exceeds a predetermined time. In this case, it is desirable that the recording paper is pulled by the predetermined transport amount upstream in the recording paper transport direction and returned to the state where it is positioned at the predetermined position.

  In the present invention, in order to return the recording paper to a predetermined position before the power is turned off, when the recording paper is in the feeding state, when the power-off command is received, the recording paper is moved upstream in the recording paper conveyance direction. It is desirable to pull back by the predetermined transport amount and return to the state positioned at the predetermined position.

  In the present invention, when the operation unit is operated for a predetermined reference time in a state where the recording sheet is positioned at the predetermined position, the recording sheet corresponds to the interval between the preprint portions. It is desirable to transport downstream by the transport amount. In this way, for example, the area of the recording paper used when issuing one receipt is transported downstream from the predetermined position, and the area of the recording paper used for issuing the next receipt is set at the predetermined position. Can be positioned.

  In the present invention, in order to change the predetermined transport amount to a desired value, when a transport amount setting command is received from an external device, the transport amount specified by the transport amount setting command is set as the predetermined transport amount. It is desirable.

Next, the printer of the present invention is
A recording paper transport path to the recording paper discharge port via the printing position by the print head;
Recording paper transport means for transporting the recording paper along the recording paper transport path;
A recording paper conveyance control means for positioning the recording paper at a predetermined position on the recording paper conveyance path when printing is completed;
An operation unit;
Determining means for determining whether or not the recording paper is in a delivery state in which the recording paper is conveyed by a predetermined conveyance amount downstream from the predetermined position in the recording paper conveyance direction;
When the operation unit is operated, the recording paper conveyance control means sends out the recording paper from the predetermined position to the downstream side in the recording paper conveyance direction by a predetermined conveyance amount when the recording paper is not in the delivery state. When the recording paper is in the feeding state, the recording paper is drawn by the predetermined transport amount upstream in the recording paper transport direction and positioned at the predetermined position.

  According to the present invention, when an operation unit such as a paper feed button is operated in a standby state in which the recording paper is positioned at a predetermined position, the recording paper is conveyed downstream in the recording paper conveyance direction by a predetermined conveyance amount. , It will be in the delivery state. Accordingly, the downstream end portion of the recording paper in the recording paper conveyance direction can be exposed from the recording paper discharge port. If the paper feed button is operated while the recording paper is being fed out, the recording paper is pulled upward in the recording paper transport direction by a predetermined transport amount and returned to a state where it has been accurately positioned, and the printer waits. Return to state. Accordingly, it is possible to check the recording paper portion that is not exposed from the recording paper discharge port when the printer is in a standby state without changing the application program of the connected external device.

  In the present invention, the recording paper includes a preprint portion that is printed at regular intervals, and the predetermined transport amount is determined so that the recording paper is discharged when the recording paper is positioned at the predetermined position. It is desirable that the preprint portion adjacent to the upstream side of the exit in the recording paper conveyance direction has a conveyance amount necessary to be exposed from the recording paper discharge port. In this way, by operating the paper feed button, the preprint portion can be exposed and confirmed from the recording paper discharge port. Further, by operating the paper feed button again after the confirmation of the preprint portion, it is possible to return the recording paper to the predetermined position.

  In the present invention, in order to return the recording paper to a predetermined position at the time when printing by the next printing command is started, the recording paper conveyance control means receives the printing command, and the recording paper is sent out by the sending out. In the case of the state, it is desirable that the recording paper is pulled by the predetermined transport amount upstream in the recording paper transport direction and positioned at the predetermined position.

  In the present invention, in order to automatically return the recording paper to a predetermined position, the recording paper has an elapsed time measuring unit that measures an elapsed time of the feeding state, and the recording paper conveyance control unit includes: When the elapsed time exceeds a predetermined time, it is desirable that the recording paper is drawn by the predetermined conveyance amount upstream in the recording paper conveyance direction and positioned at the predetermined position.

  In the present invention, in order to return the recording paper to a predetermined position before the power is turned off, the recording paper transport control means receives the power-off command, and when the recording paper is in the delivery state, It is desirable that the recording paper is pulled by the predetermined conveyance amount upstream in the recording paper conveyance direction and positioned at the predetermined position.

  In the present invention, positioning state determination means for determining whether or not the recording paper is positioned at the predetermined position, and operation time determination for detecting whether or not the operation unit has been operated for a predetermined reference time. And the recording paper transport control means moves the recording paper when the operation unit is operated for a predetermined reference time when the recording paper is positioned at the predetermined position. It is desirable that the sheet is conveyed downstream by a conveyance amount corresponding to the interval between the preprint portions. In this way, for example, the area of the recording paper used when issuing one receipt is transported downstream from the predetermined position, and the area of the recording paper used for issuing the next receipt is set at the predetermined position. Can be positioned.

  In the present invention, in order to change the predetermined transport amount to a desired value, when the recording paper transport control unit receives a transport amount setting command from an external device, the transport amount specified by the transport amount setting command Is preferably set as the predetermined transport amount.

  According to the present invention, when the paper feed button is operated in a standby state where the recording paper is positioned at a predetermined position on the recording paper conveyance path, the recording paper is moved downstream in the recording paper conveyance direction by a predetermined conveyance amount. The transported state is reached. Accordingly, the downstream end portion of the recording paper in the recording paper conveyance direction can be exposed from the recording paper discharge port. When the paper feed button is operated again, the recording paper is pulled upward in the recording paper conveyance direction by a predetermined conveyance amount and returned to a state where it is accurately positioned at a predetermined position, and the printer returns to a standby state. Accordingly, it is possible to check the recording paper portion that is not exposed from the recording paper discharge port when the printer is in a standby state without changing the application program of the connected external device.

1 is an external perspective view of a printer to which the present invention is applied. FIG. 2 is an explanatory diagram illustrating a schematic configuration of a main part of a printer. It is a schematic block diagram which shows the control system of a printer. 6 is a flowchart illustrating a recording paper transport operation.

  Embodiments of a printer to which the present invention is applied will be described below with reference to the drawings.

(printer)
FIG. 1 is an external perspective view of a printer to which the present invention is applied. The printer 1 prints print data on a long recording paper 21 fed out from the roll paper 2 and is connected to an accounting processing device (external device) to issue a receipt or the like. The printer 1 includes a rectangular parallelepiped-shaped printer case 3. The upper surface portion of the printer case 3 has a front opening / closing lid 4 that rotates around the front edge portion and opens and closes, and a rear edge portion. A rear opening / closing lid 5 that is pivoted to open and close is attached. A rectangular recording paper discharge port 6 having a predetermined width is formed between the front opening / closing lid 4 and the rear opening / closing lid 5, and the front opening / closing lid 4 and the rear opening / closing lid are on the right side of the recording paper discharge port 6. An open / close button 7 for opening / closing 5 is provided. When the opening / closing button 7 is pushed downward, the front opening / closing lid 4 and the rear opening / closing lid 5 are unlocked, and the front opening / closing lid 4 and the rear opening / closing lid 5 are rotated upward by a biasing force such as a spring force. Opened. As a result, the roll paper storage unit 8 (see FIG. 2) configured in the printer case 3 is opened, and the roll paper 2 can be loaded into the roll paper storage unit 8.

  The recording paper 21 of the roll paper 2 loaded in the roll paper storage unit 8 includes a preprint portion 23 on which printing such as a serial number 22 is performed in advance at regular intervals, and print data for issuing a receipt. Is printed in a print area 24 between adjacent preprint portions 23 on the recording paper 21. Here, before issuing a receipt, the store clerk who performs the check in the store confirms the serial number 22 preprinted on the leading end side of the recording paper 21 with respect to the printing area 24 as necessary. Is input to the accounting processing device 9 connected to the printer 1. Rectangular black marks 25 are provided on the back surface of the recording paper 21 at regular intervals. Each black mark 25 is located on the back side of each preprint portion 23.

  A concave portion 10 that is recessed to the rear side is formed in the central portion of the front portion of the printer case 3. An end surface facing upward is formed in the lower portion of the recess 10, and a paper feed button (operation unit) 11 is provided on this end surface. A power switch 12 is provided at the lower end portion of the front surface portion of the printer case 3.

  FIG. 2 is an explanatory diagram illustrating a schematic configuration of a main part of the printer 1. The printer 1 includes a recording paper transport path 13 from the roll paper storage unit 8 loaded with the roll paper 2 to the recording paper discharge port 6, and a recording paper transport mechanism that transports the recording paper 21 along the recording paper transport path 13. 14 is provided. The recording paper conveyance path 13 extends from the upstream side in the recording paper conveyance direction so as to pass through the printing position A by the print head 15 and the cutting position B by the auto cutter 16 in this order. The printing position A is defined by the platen 20. The recording paper transport mechanism 14 includes a driving roller 17a, a driven roller 17b disposed at a position facing the driving roller 17a, and a motor 18 that rotationally drives the driving roller 17a. The recording paper transport mechanism 14 is also driven by the operation of the paper feed button 11.

  The print head 15 is a serial impact dot matrix (SIDM) print head that prints by applying a recording wire to an ink ribbon (not shown) and causing the ink of the ink ribbon to adhere to the recording paper 21. The recording paper 21 passing through the printing position A is conveyed by a driving roller 17 a and a driven roller 17 b that are rotationally driven by a motor 18, and printing is performed by a printing head 15 that faces the platen 20. A photo sensor 19 for detecting a black mark 25 provided on the back side of the recording paper 21 is disposed at a paper detection position C upstream of the printing position A in the recording paper conveyance direction.

  When the roll paper 2 is loaded into the roll paper storage unit 8, the printer 1 conveys the recording paper 21 along the recording paper conveyance path 13 to the printing position A. When the black mark 25 is detected at the paper detection position C, the printer 1 transports the recording paper 21 downstream from that time by a predetermined first transport amount and positions the recording paper 21 at the print position A. More specifically, the printer 1 sets the print start target position 24a between the preprint portion 23 on the most downstream side of the recording paper 21 and the print region 24 adjacent on the upstream side of the preprint portion 23 as the print position A. Match. As a result, the printer 1 enters a standby state waiting for a print command.

  When receiving the print command from the accounting processing device 9, the printer performs printing while transporting the recording paper 21 along the recording paper transport path 13 toward the downstream side in the recording paper transport direction. When printing is completed, the recording paper 21 is positioned at the cutting position B and cut. More specifically, the printer 1 conveys the recording paper 21 to the downstream side in the recording paper conveyance direction by a predetermined second conveyance amount from the time when the black mark 25 is detected, so that the print area on which printing has been performed. The cutting target position 24b between the print area 24 and the preprinted part adjacent to the upstream side of the printing area 24 is made coincident with the cutting position B, and then the recording paper 21 is cut.

  When the cutting of the recording paper 21 is completed, the printer 1 positions the recording paper 21 at the printing position A again and enters a standby state. In other words, the printer 1 transports the recording paper 21 to the upstream side in the recording paper transport direction by a predetermined third transport amount from the end of cutting, so that the preprint portion 23 that has newly become the most downstream side of the recording paper 21. And the print start target position between the adjacent print area 24 on the upstream side of the preprint portion 23 and the print position A.

(Control system)
FIG. 3 is a schematic block diagram showing a control system of the printer 1. The control system of the printer 1 is mainly configured by a control unit 30 including a CPU, a ROM, a RAM, and the like. The control unit 30 is connected to the accounting processing device 9 and controls each unit of the printer 1 based on a command such as a print command received from the accounting processing device 9. A paper feed button 11 and a photo sensor 19 are connected to the input side of the control unit 30. A print head 15, an auto cutter 16, a motor 18 of the recording paper transport mechanism 14, and the like are connected to the output side of the control unit 30 via a driver (not shown). Upon receiving the print command from the accounting processing device 9, the control unit 30 drives the motor 18 of the recording paper transport mechanism 14 to transport the recording paper 21 fed out from the roll paper 2 along the recording paper transport path 13. Then, printing is performed by the print head 15 at the printing position A. After that, the cutting by the auto cutter 16 is performed at the cutting position B.

  When printing and cutting are completed, the control unit 30 positions the recording paper 21 at the printing position A on the recording paper transport path 13 and transports the recording paper by a predetermined transport amount based on the operation of the paper feed button 11 or the like. Recording paper conveyance control means 31 for determining, and determination means 32 for determining whether or not the recording paper 21 is in a delivery state in which the recording paper 21 has been conveyed by a predetermined conveyance amount downstream in the recording paper conveyance direction.

  When the paper feed button 11 is operated, the recording paper transport control means 31 is not in the delivery state (when the recording paper 21 is not transported from the printing position A downstream in the recording paper transport direction by a predetermined transport amount). In this case, the recording paper 21 is sent out from the printing position A to the downstream side in the recording paper conveyance direction by a predetermined conveyance amount to be in a delivery state. On the other hand, when the recording paper 21 is in the delivery state (when the recording paper 21 is transported by a predetermined transport amount downstream from the printing position A in the recording paper transport direction), the recording paper 21 is moved upstream in the recording paper transport direction. A predetermined transport amount is pulled in and positioned at the printing position A. Here, when the recording paper 21 is positioned at the printing position A, the predetermined transport amount is that of the preprint portion 23 adjacent to the upstream side of the recording paper discharge port 6 in the recording paper transport direction in the recording paper 21. The serial number 22 is a conveyance amount necessary to be exposed to the outside from the recording paper discharge port 6. Accordingly, when the recording paper 21 is sent out, the serial number 22 on the most downstream side in the recording paper conveyance direction of the recording paper 21 is exposed from the recording paper discharge port 6.

  Further, the recording paper conveyance control means 31 is configured to convey the recording paper 21 to the upstream side in the recording paper conveyance direction when the recording paper 21 is sent out when the control unit 30 receives a print command from the accounting apparatus 9. It is pulled in by the amount and positioned at the printing position A.

  Further, when receiving the transport amount setting command from the accounting processing device 9, the recording paper transport control means 31 sets the transport amount specified by the transport amount setting command as the predetermined transport amount.

  The determination unit 32 stores and holds a flag for determining the conveyance state of the recording paper 21. When the paper feed button 11 is operated, the recording paper conveyance control unit 31 moves the recording paper 21 from the printing position A to a predetermined value. This flag is set when the conveyance amount is conveyed downstream in the recording sheet conveyance direction. Further, when the recording paper transport control means 31 transports the recording paper 21 by a predetermined transport amount upward in the recording paper transport direction in the state where the flag is set, the flag is turned down. The determination unit 32 grasps the position of the recording paper 21 on the recording paper conveyance path 13 based on the detected black mark position, so that the recording paper 21 moves downstream from the printing position A in the recording paper conveyance direction. It can also be determined whether or not it is in a state where it is transported by a predetermined transport amount.

(Recording paper transport operation)
FIG. 4 is a flowchart of the recording paper transport operation when checking the preprint portion of the recording paper in the standby state. The diagram on the right side of the flowchart shows the recording paper conveyance state at the corresponding step.

  First, it is assumed that the printer 1 is in a standby state and the recording paper 21 is positioned at the printing position A. In addition, the store clerk operating the accounting processing device 9 is required to check the serial number 22 printed on the preprint portion 23 of the recording paper 21 and input it to the accounting processing device 9 before issuing a receipt. It is assumed that

  Here, in the standby state in which the recording paper 21 is positioned at the printing position A, the serial number 22 is positioned on the recording paper transport path 13 as shown in the drawing of the standby state. It is not exposed and cannot be confirmed from the outside of the printer case 3.

  When the store clerk presses the paper feed button 11 (step ST1), the recording paper transport control means 31 sends the recording paper 21 by a predetermined transport amount downstream in the recording paper transport direction. That is, the recording paper 21 is sent out (step ST2). When the recording paper is transported downstream in the recording paper transport direction by the recording paper transport control means 31, the determination means 32 determines that the recording paper 21 is in the delivery state and sets a flag. In a state in which the recording paper 21 is conveyed downstream in the recording paper conveyance direction by a predetermined conveyance amount, the preprint portion 23 on which the serial number 22 is printed is transferred from the recording paper discharge port 6 to the printer as shown in the figure of step ST2. It is exposed outside the case 3. Therefore, the store clerk can confirm the serial number 22.

  Next, when the control unit 30 receives a print command from the accounting apparatus 9 (step ST3), the recording paper conveyance control unit 31 checks the flag of the determination unit 32. That is, it is confirmed whether or not the recording paper 21 is in the delivery state. In step ST3, since the flag of the determination unit 32 is set and it is determined that the recording paper 21 is in the delivery state, the recording paper conveyance control unit 31 sets the recording paper 21 upstream in the recording paper conveyance direction. Only the transport amount is drawn and positioned at the printing position A (step ST4). When the recording paper transport control means 31 transports the recording paper 21 by a predetermined transport amount upward in the recording paper transport direction, the determination means 32 determines that the recording paper 21 is not in the delivery state and turns off the flag. As a result, the printer 1 returns to the standby state. Therefore, after that, printing according to the print command received in step ST5 is performed.

  In step ST3, when the paper feed button 11 is operated without the control unit 30 receiving a print command from the accounting processing device 9 (step ST5), the recording paper conveyance control unit 31 sets the flag of the determination unit 32. Check. That is, it is confirmed whether or not the recording paper 21 is in the delivery state. In step ST5, since the flag of the determination unit 32 is set and it is determined that the recording paper 21 is in the delivery state, the recording paper conveyance control unit 31 sets the recording paper 21 upstream in the recording paper conveyance direction. Only the transport amount is drawn and positioned at the printing position A (step ST4). When the recording paper transport control means 31 transports the recording paper 21 by a predetermined transport amount upward in the recording paper transport direction, the determination means 32 determines that the recording paper 21 is not in the delivery state and turns off the flag. As a result, the printer 1 returns to the standby state.

  In the standby state, when the control unit 30 receives a print command from the accounting processing device 9, the flag of the determination unit 32 is turned down, and it is determined that the recording paper 21 is not in the delivery state. Therefore, printing by the print command is immediately started without performing the recording paper transport operation as in step ST4.

(effect)
According to this example, when the paper feed button 11 is operated in the standby state where the recording paper 21 is positioned at the printing position A, the recording paper 21 is sent out downstream in the recording paper transport direction, and the recording paper The serial number 22 of the 21 preprint portion 23 is exposed from the recording paper discharge port 6. When the paper feed button 11 is operated again, the recording paper 21 is drawn to the upstream side in the recording paper conveyance direction and returns to the state where it is accurately positioned at the printing position A, and the printer 1 returns to the standby state. Therefore, without changing the application program of the accounting processing apparatus 9 connected, when the printer 1 is in the standby state, the portion of the recording paper 21 that is not exposed from the recording paper discharge port 6 is confirmed. Can do.

  Further, in this example, when the paper feed button 11 is operated and the recording paper 21 is sent out, the print command is issued when the serial number 22 of the preprint portion 23 of the recording paper 21 is exposed from the recording paper discharge port 6. Upon receipt, the recording paper 21 is drawn upstream in the recording paper conveyance direction and returned to the state positioned at the printing position A, and the printer 1 returns to the standby state. As a result, since the recording paper 21 is always positioned at the printing position A at the start of printing, it is possible to avoid printing at a position outside the printing area 24.

  Furthermore, in this example, when the recording paper conveyance control means 31 receives the conveyance amount setting command from the accounting processing device 9, it sets the conveyance amount specified by the conveyance amount setting command as the predetermined conveyance amount. As a result, the predetermined transport amount can be set to a desired value, so that receipts can be issued using various roll papers 2 with different serial number 22 printing positions.

[Modification 1]
In the above-described embodiment, the control unit 30 further includes elapsed time measuring means for measuring the elapsed time of the recording paper 21 being sent out, and the recording paper transport control means 31 is configured so that the elapsed time is a predetermined time. In the case where the recording paper 21 is exceeded, the recording paper 21 may be transported by a predetermined transport amount upstream in the recording paper transport direction and positioned at the printing position A. In this way, even if the paper feed button 11 is operated to confirm the preprint portion 23 and the user forgets to operate the paper feed button 11 again, the recording paper 21 is automatically printed at the printing position. Positioned at A, the printer 1 returns to the standby state.

[Modification 2]
In the above embodiment, when the recording paper transport control means 31 receives the power-off command from the accounting processing device 9, when the recording paper 21 is in the delivery state, the recording paper 21 is moved upstream in the recording paper transport direction. A predetermined conveyance amount may be conveyed and positioned at the printing position A. In this way, when the power is turned off, the recording paper 21 is positioned at the printing position A, and the printer 1 is in a standby state. As a result, since the recording paper 21 is positioned at the printing position A when the power is turned on, printing is not performed at a position outside the printing area 24 at the first printing after the power is turned on. The power-off command may be a signal from a power-off soft switch provided in the printer 1.

[Modification 3]
In the above embodiment, the control unit 30 further includes positioning state determination means for determining whether or not the recording paper 21 is positioned at the printing position A and the paper feed button 11 over a predetermined reference time. An operation time determination unit that detects whether or not an operation has been performed, and the recording paper conveyance control unit 31 is configured such that when the recording paper 21 is positioned at the printing position A, the paper feed button 11 is set in a predetermined reference time. The recording paper 21 may be transported downstream by a transport amount corresponding to the interval between the preprint portions 23. In this way, the area of the recording paper 21 used when issuing one receipt is conveyed downstream from the printing position A, and the area of the recording paper 21 used for issuing the next receipt is printed. It can be positioned at position A. In this case, the positioning state determination unit can determine that the state in which the determination unit 32 tilts the flag is the state in which the recording paper 21 is positioned at the printing position A.

(Other embodiments)
In the above embodiment, the printer 1 performs printing with a serial impact dot matrix (SIDM) print head. However, the printer 1 may perform printing with an inkjet head. Moreover, you may print by a thermal head. When the print head is a thermal head, a platen roller driven by a motor is disposed at a position facing the print head as a recording paper transport mechanism, and the recording paper is transported while being pressed against the print head by the platen roller.

  Further, the printer 1 prints on the roll paper 2, but prints on fanfold paper folded at a perforation position attached every fixed length, or on a single sheet. Also good.

1. Printer, 2. Roll paper, 3. Printer case, 4. Front open / close lid, 5. Rear open / close lid, 6. Recording paper outlet, 7. Open / close button, 8. Roll paper storage, 9. Accounting processing. Device 10. Recess, 11. Paper feed button (operation unit) 12. Power switch 13. Recording paper transport path 14. Recording paper transport mechanism 15. Print head 16. Auto cutter 17a Drive roller 17b · Followed roller, 18 · Motor, 19 · Photo sensor, 20 · Platen, 21 · Recording paper, 22 · Serial number, 23 · Preprint part, 24 · Print area, 24a · Print start target position, 24b · Cutting target Position, 25 · black mark, 30 · control unit, 31 · recording paper conveyance control means, 32 · determination means, A · printing position, B · cutting position, C · paper detection position

Claims (14)

Print while conveying the recording paper along the recording paper conveyance path to the recording paper discharge port via the printing position by the print head,
When the printing is finished, the recording paper is positioned at a predetermined position on the recording paper conveyance path,
When the operation unit is operated, the recording paper is transported from the predetermined position to the downstream side in the recording paper transport direction until a predetermined transport amount is fed, and the transport state is reached.
When the operation unit is operated again, the recording paper conveyance control of the printer is characterized in that the recording paper is drawn by the predetermined conveyance amount upstream in the recording paper conveyance direction and returned to the state positioned at the predetermined position. Method. The recording paper includes a preprinted portion that is printed at regular intervals,
2. The recording paper transport control method for a printer according to claim 1, wherein when the recording paper is in the delivery state, the preprint portion on the most downstream side in the recording paper transport direction is exposed from the recording paper discharge port.   The printing apparatus according to claim 1, wherein when the recording paper is in the delivery state and receives a print command, the recording paper is drawn by the predetermined transport amount upstream in the recording paper transport direction and returned to the state positioned at the predetermined position. Item 3. A recording paper conveyance control method for a printer according to Item 1 or 2. The recording paper measures the elapsed time of the delivery state,
When the elapsed time exceeds a predetermined time, the recording paper is drawn by the predetermined conveyance amount upstream in the recording paper conveyance direction and returned to the state positioned at the predetermined position. A recording paper conveyance control method for a printer according to claim 1 or 2.   When the recording paper is in the delivery state and receiving a power-off command, the recording paper is pulled by the predetermined transport amount upstream in the recording paper transport direction and returned to the state positioned at the predetermined position. A recording paper conveyance control method for a printer according to claim 1 or 2.   In a state where the recording sheet is positioned at the predetermined position, when the operation unit is operated for a predetermined reference time, the recording sheet is moved downstream by a conveyance amount corresponding to the interval between the preprint portions. The recording paper conveyance control method for a printer according to claim 2, wherein the recording paper conveyance control method is performed to the side.   7. The method according to claim 1, wherein when a transport amount setting command is received from an external device, the transport amount specified by the transport amount setting command is set as the predetermined transport amount. The recording paper conveyance control method of the printer as described. A recording paper transport path to the recording paper discharge port via the printing position by the print head;
Recording paper transport means for transporting the recording paper along the recording paper transport path;
A recording paper conveyance control means for positioning the recording paper at a predetermined position on the recording paper conveyance path when printing is completed;
An operation unit;
Determining means for determining whether or not the recording paper is in a delivery state in which the recording paper is conveyed by a predetermined conveyance amount downstream from the predetermined position in the recording paper conveyance direction;
When the operation unit is operated, the recording paper conveyance control means sends out the recording paper from the predetermined position to the downstream side in the recording paper conveyance direction by a predetermined conveyance amount when the recording paper is not in the delivery state. The printer is characterized in that when the recording paper is in the feeding state and the recording paper is in the feeding state, the recording paper is pulled by the predetermined transport amount upstream in the recording paper transport direction and positioned at the predetermined position. The recording paper includes a preprinted portion that is printed at regular intervals,
The predetermined transport amount is such that when the recording paper is positioned at the predetermined position, the preprint portion adjacent to the upstream side of the recording paper discharge port in the recording paper transport direction is separated from the recording paper discharge port. The printer according to claim 8, wherein the conveyance amount is necessary for exposure.   When the recording paper transport control means receives the print command, when the recording paper is in the delivery state, the recording paper transport controller pulls the recording paper upstream by the predetermined transport amount in the recording paper transport direction and positions it at the predetermined position. The printer according to claim 8, wherein the printer is a printer. The recording paper has elapsed time measuring means for measuring the elapsed time of the delivery state,
When the elapsed time exceeds a predetermined time, the recording paper transport control means pulls the recording paper upstream by the predetermined transport amount in the recording paper transport direction and positions the recording paper at the predetermined position. The printer according to claim 8 or 9, characterized by the above.   When the recording paper conveyance control means receives the power-off command, when the recording paper is in the delivery state, the recording paper conveyance control means draws the recording paper upstream in the recording paper conveyance direction by the predetermined conveyance amount to the predetermined position. The printer according to claim 8 or 9, wherein positioning is performed. Positioning state determining means for determining whether or not the recording paper is positioned at the predetermined position;
Operation time determination means for detecting whether or not the operation unit has been operated over a predetermined reference time;
In the case where the recording paper is positioned at the predetermined position and the operation unit is operated for a predetermined reference time, the recording paper conveyance control means moves the recording paper between the preprint portions. The printer according to claim 9, wherein the printer is transported to the downstream side by a transport amount corresponding to.   14. The recording paper conveyance control unit, when receiving a conveyance amount setting command from an external device, sets the conveyance amount specified by the conveyance amount setting command as the predetermined conveyance amount. A printer according to any one of the above.

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