JP2009123028A - Merchandise sales data processing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use receipt paper efficiently by issuing receipts having a small margin and a short overall length. <P>SOLUTION: A merchandise sales data processing apparatus comprises a receipt printer having a first printhead for printing one side of receipt paper 151 and a second printhead for printing the other side to print both sides of the receipt paper 151. The merchandise sales data processing apparatus executes, per transaction, merchandise sales data processing including the storage of transaction information 402 and the issuance of a receipt RT printed with the transaction information 402. In the process of issuing the receipt RT, the merchandise sales data processing apparatus drives the receipt printer in response to a declaration of completion of a single transaction to execute the process of printing fixed information 403 of predetermined print position and print length on the receipt paper 151 and the process of printing the transaction information 402 outside the print area of the fixed information 403 dividingly on both sides of the receipt paper 151 such that the receipt RT pertinent to the transaction has a minimum length. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a merchandise sales data processing apparatus (POS terminal) including a receipt printer capable of printing on both sides of a receipt sheet.

  In a store where a merchandise sales data processing apparatus (POS terminal) equipped with a receipt printer is installed, when a customer purchases a product, various items such as receipt date, issuer, address, amount of money, and details of the amount are printed. A receipt is issued. In the issued receipt, information is usually printed only on one side, but nothing is printed on the other side, and the back side of the receipt paper is not effectively utilized.

  In order to solve this problem, the back side of the receipt paper is effectively utilized by issuing a receipt using a POS terminal equipped with a receipt printer capable of printing on both sides of the receipt paper (for example, Cash registering machine described in Patent Document 1).

JP-A-11-328534

  The receipt generally serves as a receipt to prove that the customer has purchased the item. Therefore, the name of the store where the product was purchased and the payment amount paid at the store were usually printed on the surface of the receipt, and the person who picked up the receipt had a certain transaction at the store. Can understand.

  Here, a receipt issued from a receipt printer capable of printing on both sides will be considered. Normally, transaction information is printed on the surface of the receipt so that the transaction details can be understood, and the print length on the surface of the receipt is the number of items purchased by the customer. Will change accordingly. On the other hand, the transaction information is not normally printed on the back side of the receipt. For example, as shown in paragraph number 0019 of Patent Document 1, an advertisement whose printing position and printing length are predetermined is predetermined. Fixed information such as information is printed. For this reason, a receipt printer capable of printing on both sides issues a receipt having a blank portion where nothing is printed on either the front surface or the back surface. That is, it can be said that the receipt paper is wasted by an amount corresponding to the margin portion generated in the receipt and is not effectively used.

  An object of the present invention is to issue a receipt having a small margin and a reduced overall length, and to effectively use the receipt paper.

  A merchandise sales data processing apparatus according to the present invention is a merchandise sales data processing apparatus that executes merchandise sales data processing including storing transaction information for each transaction and issuing a receipt on which the transaction information is printed. A transport mechanism that transports the receipt paper in the length direction along a guide path that communicates with the discharge unit, and a first printing that performs printing on one surface of the receipt paper transported along the guide path A receipt printer comprising a head and a second print head for printing on the other surface; and a fixed printing position and printing length determined in advance by driving and controlling the receipt printer in response to a transaction end declaration. A process of printing information on the receipt paper, and the transaction information is distributed to one side and the other side of the receipt paper so that the receipt length of the one transaction is the shortest And means for executing a process of printing on a region other than the print area of the fixed information occupying the said receipt, and the.

  According to the present invention, the receipt printer is driven and controlled according to the declaration of the end of one transaction, and the fixed information whose printing position and printing length are determined in advance is printed on the receipt paper, and the receipt of the one transaction Since the transaction information is distributed to one side and the other side of the receipt paper so that the length is the shortest and printing is performed in an area other than the fixed information printing area in the receipt, the margin portion is A receipt with a reduced overall length can be issued to effectively use the receipt paper.

  An embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing an external appearance of the POS device 100. The POS device 100 is configured by connecting a receipt printer 107 to a POS terminal 101 through a connection cord 113 so as to allow data communication with each other.

  The POS terminal 101 includes an input unit for inputting information such as a product code for specifying a product and the number of products purchased by a customer, and RAM 203 serving as a storage unit stores transaction information generated based on the input product code. (See FIG. 3) Temporary storage processing, Receipt issuance processing (see FIG. 7) for issuing a receipt printed with this transaction information, Settlement processing based on this transaction information, A product sales data process including a process to transmit is executed. The POS terminal 101 includes a main body 102, an LCD display 104 serving as a cashier-side display unit, and a customer-side display unit 106.

  The main body 102 is configured by housing each part described later with reference to FIG. 3 in a rectangular parallelepiped housing 102a having flat surfaces facing the casher side and the customer side. The housing 102a has a shape slightly inclined toward the customer side, has a rectangular shape when viewed from the cashier side and the customer side, and has a parallelogram shape when viewed from the side surface. From the bottom surface of the housing 102a to the customer side, a plate-like leg portion 103 for allowing the main body 102 of the POS terminal 101 to be stably placed on the placement surface extends.

  The LCD display 104 is positioned on a plane facing the cashier side of the housing 102a of the main body 102 of the POS terminal 101. The LCD display 104 is arranged with a display surface for displaying various types of information facing the cashier side, and serves as an information output unit. Fulfill. On the display surface of the LCD display 104, a touch panel 105 serving as an information input unit for inputting information to the POS terminal 101 by touch designation is laminated. On the LCD display 104, operation input to the POS device 100 performed by the cashier at the time of accounting, such as product information that supports the input of the product code to the POS terminal 101 and a numeric keypad image that supports the number input to the POS terminal 101. Various types of information for supporting The cashier can input various types of information to the POS terminal 101 by performing touch designation from the touch panel 105 according to the information displayed on the LCD display 104.

  The customer-side display unit 106 is arranged in a state of protruding from the upper surface of the housing 102a of the main body 102 of the POS terminal 101, and is arranged with the display surface for displaying various information facing the customer side. The customer display unit 106 also serves as an information output unit.

  Although not shown in FIG. 1, a keyboard 211 (see FIG. 3) as an information input unit and a code scanner 212 (see FIG. 3) as a product code input unit are connected to the main body 102 of the POS terminal 101. . Therefore, the cashier can input various information to the POS terminal 101 using the keyboard 211. Further, the cashier can input a product code attached to a product (not shown) in the form of a code symbol into the POS terminal 101 using the code scanner 212.

  FIG. 2 is a schematic diagram showing an outline of the internal configuration of the receipt printer 107. The external configuration and internal configuration of the receipt printer 107 will be described with reference to FIGS. 1 and 2. The receipt printer 107 used in the present embodiment is a thermal printer provided with a line-type printing type thermal head in a printing unit for performing printing. The receipt printer 107 is configured by housing each part (see FIGS. 2 and 3) inside a substantially rectangular parallelepiped housing 108. A rear surface of the upper surface of the housing 108 is opened, and the opened portion is closed by a lid 109. The lid portion 109 is connected to the rear upper end of the opened portion of the housing 108, and is openable and closable with respect to the housing 108 so as to be opened upward with the connection location as a fulcrum. A power button 110 of the receipt printer 107 is positioned in front of the upper surface of the housing 108. A paper discharge port 111 serving as a paper discharge unit is formed between the rear end of the upper surface of the housing 108 on which the power button 110 is disposed and the front end of the lid portion 109 in a closed state. A receipt paper 151 (see FIG. 2) accommodated in the receipt printer 107 is discharged from the paper discharge port 111 as a receipt RT.

  A receipt paper 151 capable of printing on both sides is used for the receipt printer 107. Receipt paper 151 used in the present embodiment is formed by sequentially laminating a thermal layer that develops color when a predetermined applied energy is applied to each of both surfaces of a flat substrate, and a protective layer that protects the thermal layer. This is a heat-sensitive receipt paper. The receipt paper 151 is rotatably held by a paper holding unit 152 provided in the receipt printer 107 while being wound in a roll shape. Inside the receipt printer 107, a guide path 156 is formed from the paper holding unit 152 through the front surface printing unit 153, the back surface printing unit 154, and the cutter mechanism 155 to the paper discharge port 111. In the middle of the guide path 156, a front platen 153p, a back platen 154p, and a guide roller 158 that are rotated by a transport motor 214 (see FIG. 3) are arranged. The front platen 153p, the back platen 154p, and the guide roller 158 constitute a transport mechanism 160 that transports the receipt paper 151 along the guide path 156. The transport mechanism 160 transports the receipt paper 151 along the guide path 156 from the paper holding unit 152 on the upstream side of the guide path 156 toward the paper discharge port 111 on the downstream side of the guide path 156. In the middle of the guide path 156, a sensor unit 161 used for detecting the conveyance timing of the receipt paper 151 by the conveyance mechanism 160 is disposed. The sensor unit 161 transmits a detection signal when a position detection mark written on the receipt paper 151 is detected, and controls the control unit 215 (see FIG. 3) based on the detection signal generated from the sensor. And a circuit for transmitting information indicating the presence / absence of detection of the mark. A control unit 215 that controls each unit of the receipt printer 107 grasps the conveyance speed of the receipt paper 151 in accordance with information transmitted from the sensor unit 161, controls the conveyance motor 214, and rotates each roller constituting the conveyance mechanism 160. Adjust the moving speed.

  The surface printing unit 153 includes a surface platen 153p provided on the upper side in FIG. 2 of the guide path 156, and a surface thermal head 153s as a line-type first print head that is opposed to the surface platen 153p via the guide path 156. The predetermined matter is printed on one surface (front surface) of the receipt paper 151 conveyed along the guide path 156. The back surface printing unit 154 includes a back surface platen 154p provided below the guide path 156 in FIG. 2 and a back surface thermal head 154s as a line-type second print head that is in contact with the back surface platen 154p via the guide path 156. The predetermined matter is printed on the other surface (back surface) of the receipt paper 151 conveyed along the guide path 156. The surface thermal head 153s is disposed so as to contact the surface platen 153p with a predetermined pressure, and a plurality of heating resistors 153h are arranged in a line in the main scanning direction in a portion facing and contacting the surface platen 153p. It is equipped with. Similarly, the back thermal head 154s is disposed so as to abut on the back platen 154p with a predetermined pressure, and a plurality of heating resistors 154h are arranged in a line in the main scanning direction in a portion facing and contacting the back platen 154p. Prepared in an array. Both the front thermal head 153s and the rear thermal head 154s are configured so that a voltage from a power supply circuit (not shown) can be selectively applied to the heating resistors 153h and 154h arranged in a line in the line direction. .

  The cutter mechanism 155 is configured by combining a fixed blade 155a and a movable blade 155b. Each of the fixed blade 155a and the movable blade 155b has a plate-like plate shape with a blade portion on one side, and the two blades facing each other with the respective blade portions opposed to each other with the guide path 156 interposed therebetween. The receipt paper 151 transported along the guide path 156 is spaced between the sections so as to be inserted. The movable blade 155b slides in the extending direction of the blade provided to the fixed blade 155a by driving the cutter motor 214a (see FIG. 3), and cuts the receipt paper 151 inserted between the fixed blade 155a and the movable blade 155b. To do. That is, the cutter mechanism 155 is a mechanism for cutting the receipt paper 151. The receipt paper 151 cut by the cutter mechanism 155 is discharged as a receipt RT from the paper discharge port 111 in a state where the surface printed by the front thermal head 153s faces the front side of the receipt printer 107.

  FIG. 3 is a block diagram showing an electrical configuration of the POS device 100. The POS terminal 101 constituting the POS device 100 includes a CPU 202 that executes various arithmetic processes and centrally controls each unit. The CPU 202 is bus-connected to a RAM 203 that stores variable data in a rewritable manner and a ROM 204 that stores fixed data and holds the stored contents without power feeding. The CPU 202, the RAM 203, and the ROM 204 constitute an information processing unit 201 in the POS device 100 that executes information processing. The information processing unit 201 includes a clock circuit 205, a buzzer circuit 206, a communication interface 207, an external device interface 208, an FD drive 209, an HDD 210, an LCD display 104, a touch panel 105, and a customer side display via an input / output circuit (not shown). The unit 106, the keyboard 211, and the code scanner 212 are connected by a bus. The clock circuit 205 transmits the current time to the information processing unit 201. A non-volatile backup RAM 205a is connected to the clock circuit 205, and the current time stored in the clock circuit 205 is periodically backed up to the backup RAM 205a. The buzzer circuit 206 emits a predetermined buzzer sound under the control of the information processing unit 201. The communication interface 207 performs wired or wireless communication with other devices via a network (not shown). The external device interface 208 realizes data communication between the POS terminal 101 and another device connected to the POS terminal 101 via the connection cord 113. The FD drive 209 reads information stored in the FD in accordance with control by the information processing unit 201 in a state where the FD as an external storage medium is mounted.

  The HDD 210 connected by bus to the information processing unit 201 stores and saves various data files including an operating system, a driver, a program, a PLU file, and a format file F (see also FIG. 5) (except for the format file F). Not shown). The operation system provides common basic functions among various software executed by the information processing unit 201, such as information input / output and disk / memory address management. The driver is a collection of control programs for driving and controlling each unit constituting the POS terminal 101 and a device such as the receipt printer 107 connected to the POS terminal 101. The program includes processing contents for causing the POS device 100 to execute various processes including a merchandise sales data process (described above) and a receipt issue process (see FIG. 7). The PLU file stores product information such as product names and unit prices in association with product codes. The format file F stores a print format 301a (see FIG. 5) applied to transaction information printed on the receipt paper 151, and a print object 301b (see FIG. 5) constituting fixed information. The data structure of transaction information, fixed information, and format file F will be described later with reference to FIG.

  When the POS terminal 101 is activated, the information processing unit 201 copies all or part of various files such as an operating system, a driver, a program, a PLU file, and a format file F stored in the HDD 210 to the RAM 203. The various processes executed by the system 201 are accelerated. The information processing unit 201 executes various processes in accordance with descriptions of the operating system, driver, and program. The PLU file is used when executing merchandise sales data processing executed by the information processing unit 201. The format file F is used when the information processing unit 201 executes a receipt issuing process.

  The receipt printer 107 constituting the POS device 100 includes a CPU, a ROM, and a RAM, and a control unit 215 that drives and controls each unit. The control unit 215 includes a front surface thermal head 153 s, a back surface thermal head 154 s, a sensor unit 161, a conveyance motor 214, a cutter motor 214 a, an external device interface 216, and an image memory 217 via an input / output circuit (not shown). Each has a bus connection. The conveyance motor 214 serves as a drive source for driving the conveyance mechanism 160 disposed inside the receipt printer 107. As an example, a stepping motor capable of rotating the rollers constituting the transport mechanism 160 in both forward and reverse directions can be employed as the transport motor 214. The cutter motor 214 a serves as a drive source for moving the movable blade 155 b constituting the cutter mechanism 155 to cut the receipt paper 151. The external device interface 216 realizes data communication between the receipt printer 107 and another device connected to the receipt printer 107 via the connection cord 113. The image memory 217 is connected to the control unit 215 by a bus. The image memory 217 stores rewritable print data printed by the front thermal head 153s and the rear thermal head 154s. The control unit 215 develops output information to be printed and output on the receipt paper 151 in the image memory 217 as print data composed of print dots arranged in a grid, and stores the print data in the image memory 217. To do. The print data developed in the image memory 217 is taken out line by line and printed on the receipt paper 151 by the front thermal head 153s and the rear thermal head 154s. In the present embodiment, a line memory applied to each of the front surface printing unit 153 and the back surface printing unit 154 can be employed as the image memory 217.

  As described above, the POS terminal 101 and the receipt printer 107 constituting the POS device 100 are connected to each other via the connection cord 113 so that data communication is possible. Then, the information processing unit 201 executes the receipt issuing process (see FIG. 7), and the control unit 215 outputs the surface thermal head 153s together with the output information to be printed on the receipt paper 151 and output to the receipt printer 107. Then, control signals for driving and controlling the respective parts including the front platen 153p, the back thermal head 154s, the back platen 154p, the cutter mechanism 155, and the guide roller 158 are sent to the receipt printer 107 to issue a receipt RT. The control unit 215 of the receipt printer 107 develops and stores the output information transmitted from the information processing unit 201 of the POS terminal 101 in the image memory 217 as print data. When the control unit 215 of the receipt printer 107 receives a control signal transmitted from the information processing unit 201 of the POS terminal 101, the control unit 215 controls each unit provided in the receipt printer 107 according to the received control signal, and controls the receipt paper 151. The print data developed in the image memory 217 is printed, the receipt paper 151 printed by the cutter mechanism 155 is cut, and the receipt paper 151 cut from the paper discharge port 111 is discharged as a receipt RT.

  FIG. 4 is a schematic diagram showing a data flow until output information is printed on both sides of the receipt paper 151. The POS device 100 having the above configuration executes product sales data processing (described above) based on the product code input from the code scanner 212 as the product code input unit for each transaction. Then, the POS device 100 drives and controls the receipt printer 107 according to the end declaration of one transaction input from the keyboard 211 or the touch panel 105 so that the receipt RT issued from the receipt printer 107 has the shortest length. Then, a receipt issuance process (see FIG. 7) is executed in which output information 401 composed of transaction information 402 and fixed information 403 is printed on both sides of receipt paper 151 and discharged as receipt RT. The transaction information 402 includes information related to the product purchased by the customer, such as a product code, a product name, an item, a unit price, and a purchase score of the product purchased by the customer. The transaction information 402 is printed on the receipt paper 151 and appears on the receipt RT, so that the person viewing the receipt RT can grasp the transaction content. Each item included in the transaction information 402 is based on information corresponding to the input product code acquired from the PLU file by the information processing unit 201 of the POS terminal 101, or numerical information input from the touch panel 105 or the keyboard 211. Generated and temporarily stored in the RAM 203. The fixed information 403 includes customer information such as advertisement information, store information about the store, current point information indicating the acquisition status of the privilege points that have been granted to the customer, and a predetermined message display directed to the customer from the store. Are constituted by each item printed on the receipt paper 151 regardless of the number of items of the purchased goods. This fixed information 403 has a printing position and printing length determined in advance, and is printed at a predetermined position on the receipt paper 151 in each transaction. Each item constituting the fixed information 403 is classified in advance into front surface fixed information 403a printed on the front surface of the receipt paper 151 and back surface fixed information 403b printed on the back surface of the receipt paper 151. Each item constituting the fixed information 403 is stored in advance in a format file F (see FIG. 5) stored in the HDD 210.

  FIG. 5 is a schematic diagram showing the data structure of the format file F. As shown in FIG. FIG. 6 is a schematic diagram showing an example of a receipt RT on which output information 401 reflecting the contents of the format file F shown in FIG. 5 is printed. The format file F stored in the HDD 210 is printed on the receipt paper 151 as the element OBJ which constitutes the print format 301a for causing the transaction information 402 to appear as the element OBJ printed on the receipt paper 151 and the fixed information 403. The print object 301b is stored. Both the print format 301 a and the print object 301 b are configured by various setting items including data contents 302, a surface definition 303, and the number of lines 304. The data content 302 is data that is the basis of the element OBJ printed on the receipt paper 151. When the data content 302 is printed on the receipt paper 151, the data content 302 occupies a predetermined length in the length direction of the receipt paper 151. The figure and the character string are printed in full in the width direction. The side definition 303 defines whether the transaction information 402 and the print object 301b after applying the print format 301a are to be printed on the front side or the back side of the receipt paper 151. The number of lines 304 indicates the size of the receipt paper 151 in the row direction when the transaction information 402 to which the print format 301a is applied and the print object 301b constituting the fixed information 403 are printed on the receipt paper 151. The line height defined by the height of the character string printed on the receipt paper 151 is taken as one unit. The print format 301 a and the print object 301 b included in the format file F can be set to arbitrary values by an operation input from an information input unit such as the touch panel 105 or the keyboard 211. This setting is realized by a setting program stored in the HDD 210.

  The transaction information 402 and the print object 301b after the application of the print format 301a are printed on the front and back surfaces of the receipt paper 151 according to the arrangement order in the format file F in the receipt issuing process, and the element OBJ is displayed on the receipt paper 151. Appears as. In the example shown in FIG. 5, the format file F is applied to the transaction information 402 of the number of items n, and the receipt information sheet 402 is displayed as an element OBJ that appears as an item display (see FIG. 6) for the print length 2n lines. A print format 301a to be output to 151 and a plurality of print objects 301b appearing as elements OBJ with a fixed print length corresponding to the number of lines defined in the format file F on the receipt paper 151 are stored in the order shown in FIG. Yes. Therefore, when the POS device 100 reflects the format file F in the output information and prints on the receipt paper 151, the both sides of the receipt paper 151 are in the order stored in the format file F as shown in FIG. Each element OBJ appears.

  Returning to the description based on FIG. The output information 401 composed of the transaction information 402 and the fixed information 403 is printed by the front surface output information 404 printed by the front surface thermal head 153s and the back surface thermal head 154s based on the number of print lines of the output information 401. And output to the receipt printer 107 respectively. In the receipt printer 107, the front surface output information 404 is developed as the front surface print data 406 in the image memory 217 and then printed on the front surface of the receipt paper 151 by the front surface thermal head 153 s, and the back surface output information 405 is stored in the image memory 217. Is printed on the back surface of the receipt paper 151 by the back surface thermal head 154s.

  FIG. 7 is a flowchart showing the flow of receipt issuing processing. The information processing unit 201 executes product sales data processing based on the product code input from the code scanner 212, generates transaction information 402 (see FIG. 4) based on the product code, and the transaction information 402 and the touch panel 105. And the payment amount of the customer input from the keyboard 211 is stored in the RAM 203. If it is determined that a transaction end declaration is input from the touch panel 105 or the keyboard 211 in a state where the transaction information 402 and the payment amount are stored in the RAM 203, the information processing unit 201 calculates a subtotal amount calculated based on the transaction information 402. Settlement processing is started, and receipt issuance processing is started.

  When the receipt issuing process is started, the information processing unit 201 acquires information on the print object 301b stored in the format file F, and stores the surface fixing information 403a (see FIG. 4) printed on the surface of the receipt paper 151. The printing length L1 and the printing length L2 of the back surface fixing information 403b (see FIG. 4) printed on the back surface of the receipt paper 151 are calculated (step S101). More specifically, in step S101, the information processing unit 201 obtains the surface fixing information 403a to be printed on the surface of the receipt paper 151 with the surface definition 303 of the print object 301b included in the format file F being “table”. The constituent print objects 301b are extracted, and the total number of lines 304 (see FIG. 5) in the extracted print objects 301b is set to L1. Similarly, in step S101, the information processing unit 201 prints the back surface fixed information 403b that is printed on the back surface of the receipt paper 151 with the surface definition 303 “back” in the print object 301b included in the format file F. The object 301b is extracted, and the total number of lines 304 in the extracted print object 301b is L2.

  As a subsequent process, the information processing unit 201 applies the print format 301 a stored in the format file F to the transaction information 402 stored in the RAM 203 and the transaction information 402 is printed on the receipt paper 151. Is calculated (step S102). In the present embodiment, the number of lines 304 (see FIG. 5) is used as a reference unit for obtaining the print length of various information printed on the receipt paper 151. The transaction information 402 includes information related to the product purchased by the customer. Therefore, the information processing unit 201 counts the number of items n included in the transaction information 402, and uses this n and the number of lines 304 included in the print format 301a in the format file F (see FIG. 5) to determine the transaction. The number of lines La (n) is calculated as the print length occupied by n item displays (see FIG. 6) that appear when the information 402 is printed on the receipt paper 151.

  As a subsequent process, the information processing unit 201 distributes the output information 401 including the transaction information 402 and the fixed information 403 to each of the front surface output information 404 and the back surface output information 405 so that the receipt RT has the shortest length ( Step S103). More specifically, the information processing unit 201 distributes the print object 301b constituting the front surface fixing information 403a to the front surface output information 404 and the print object 301b constituting the back surface fixing information 403b to the back surface output information 405, respectively. Data having a print length corresponding to the number of lines (La (n) + ΔL) / 2 from the rear end side of the transaction information 402 is distributed to the back surface output information 405, and the remaining transaction information 402 is distributed to the front surface output information 404 (however, ΔL is a difference between the printing length L1 of the front surface fixing information 403a and the printing length L2 of the back surface fixing information 403b, and ΔL = L1−L2. At this time, the value of the number of lines (La (n) + ΔL) / 2 is rounded to an integer so that the contents printed on the front and back surfaces of the receipt paper 151 are not cut in the middle of the line. That is, the output information 401 printed on the receipt paper 151 by the receipt printer 107 is a part of the transaction information 402 and the surface fixing information 403a according to the print format 301a and the number of lines 304 of the print object 301b stored in the format file F. And the backside output information 405 including the remaining part of the transaction information 402 and the backside fixed information 403b.

  As a subsequent process, the information processing unit 201 transmits the front surface output information 404 and the back surface output information 405 generated in step S103 to the receipt printer 107, and the receipt printer 107 outputs the front surface output information 404 and the back surface output information 405 to the receipt paper 151. Is printed (step S104), and the receipt issuing process is terminated.

  When the receipt printer 107 receives the front surface output information 404 and the back surface output information 405 to be transmitted, the front surface print data 406 and the back surface print data 407 are developed and stored in the image memory 217 (see FIG. 4), and the front surface print data 406 is stored. Printing is performed on the front surface of the receipt paper 151 by the front surface thermal head 153s of the front surface printing unit 153, and the back surface print data 407 is printed on the back surface of the receipt paper 151 by the back surface thermal head 154s of the back surface printing unit 154. In the receipt printer 107, the front thermal head 153s constituting the front surface printing unit 153 and the rear thermal head 154s constituting the rear surface printing unit 154 face each other at the same position on the guide path 156 due to structural restrictions. It is not arranged (see FIG. 2). Therefore, the receipt printer 107 drives and controls the conveyance motor 214 and drives the conveyance mechanism 160 to convey the receipt paper 151 in the upstream direction (so-called back feed) and the downstream direction of the guide path 156 and on the receipt paper 151. Control is performed to adjust the printing position so as not to create a blank at the downstream end of the receipt paper 151. After printing on both sides of the receipt paper 151, the control unit 215 of the receipt printer 107 drives the transport mechanism 160 to position the printing end of the receipt paper 151 printed on both sides in the cutter mechanism 155, and then for the cutter. The motor 214a is driven and controlled to operate the cutter mechanism 155 to cut the receipt paper 151, and the transport mechanism 160 is driven to discharge the receipt paper 151 cut from the paper discharge port 111 as a receipt RT.

  FIG. 8 is an explanatory diagram showing an example of a receipt RT issued by the POS device 100. The POS device 100 that executes the receipt issuing process drives and controls the receipt printer 107 in accordance with a transaction end declaration input from the keyboard 211 or the touch panel 105, and the printing position and printing length are determined in advance. Processing for printing the fixed information 403 on the receipt paper 151, and the fixed information occupying the receipt RT by distributing the transaction information 402 to the front and back surfaces of the receipt paper 151 so that the length of the receipt RT of the one transaction is the shortest Since the processing for printing in the area other than the printing area 403 is executed, a receipt RT with a small margin W and a reduced overall length can be issued to effectively use the receipt paper 151. In the POS terminal 101 according to the present embodiment, a line memory can be adopted as the image memory 217. Therefore, the structure of the data input / output circuit constituting the front surface printing unit 153 and the back surface printing unit 154 is not complicated. Further, the manufacturing unit price of the entire POS device 100 can be suppressed.

  As an example, FIG. 8 shows a case where a receipt RT printed with transaction information 402 with the number of purchased items n = 4 is issued using the POS device 100. As illustrated in FIG. 8, the information processing unit 201 executes a receipt issuing process, and the line number L1 = 19 lines that is the print length of the front surface fixing information 403a and the line number L2 that is the print length of the back surface fixing information 403b. = 15 rows are calculated (step S101 in FIG. 7), and the print format 301a is applied to the transaction information 402, and the transaction information 402 is printed on the receipt paper 151 and appears as an item display. (N) = 2 × 4 = 8 is calculated (step S102 in FIG. 7). Then, the information processing unit 201 distributes the transaction information 402 for the number of lines (La (n) + ΔL) ÷ 2 = 6 lines from the rear end side to the back side of the receipt paper 151, and sets the print length to two lines. The remaining transaction information 402 is distributed to the surface of the receipt paper 151 (step S103 in FIG. 7). As a result, the front surface of the receipt RT discharged from the receipt printer 107 is printed with the front surface fixing information 403a and the transaction information 402 for two lines in print length, and the back surface of the receipt RT is printed with the rear surface fixing information 403b. The transaction information 402 for six lines is printed in length, and the print lengths of the front and back surfaces of the receipt RT are both 21 lines. In this way, by using the POS device 100 of the present embodiment, a receipt with a small margin W generated when a transaction RT 402 is printed on the surface and a receipt RT is issued (FIG. 8A). RT is issued from the receipt printer 107 (FIG. 8B).

  As shown in FIG. 8B, a partition line S is printed between the back surface fixing information 403b printed on the back surface of the receipt paper 151 and the transaction information 402, and the issued receipt RT is picked up. The portion printed below the partition line S may be shown to the person to be printed on the surface of the receipt RT.

  Next, another embodiment will be described with reference to FIGS. In this case, the same parts as those in the embodiment described with reference to FIGS. 1 to 8 are denoted by the same reference numerals, and the description thereof is also omitted.

  FIG. 9 is a schematic diagram showing a data flow until the output information 401 is printed on both sides of the receipt paper 151 in the POS device 100 of the present embodiment. In the POS apparatus 100 according to the present embodiment, output information 401 including transaction information 402 and fixed information 403 is transmitted to the receipt printer 107 as it is, and is developed as print data 408 in the image memory 217 by the receipt printer 107. After being stored, the print data 408 is divided into front surface print data 406 and back surface print data 407 by the control unit 215, and the front surface print data 406 is printed on the front surface of the receipt paper 151 by driving control of the front surface thermal head 153s. A receipt RT is issued by printing the print data 407 on the back surface of the receipt paper 151 by driving control of the back surface thermal head 154s.

  FIG. 10 is a flowchart showing the flow of receipt issue processing in the present embodiment. When the information processing unit 201 of the present embodiment starts the receipt issuing process, the information processing unit 201 applies the print format 301a stored in the format file F to the transaction information 402, and the receipt printer 107 transmits the transaction information 402 to the receipt paper. In step S201, the output information 401 including the transaction information 402 and the fixed information 403 is transmitted to the receipt printer 107 (step S202). Upon receipt of the output information 401 to be transmitted, the receipt printer 107 expands and stores the print data 408 in the image memory 217 (see FIG. 9).

  FIG. 11 is a schematic diagram illustrating a data configuration of print data 408 stored in the image memory 217. In the present embodiment, a RAM capable of storing a print image to be printed on the receipt paper 151 is employed as the image memory 217. The image memory 217 according to the present embodiment stores print data 408 developed based on the output information 401. At least the surface fixing information 403a printed on the surface of the receipt paper 151 among the fixed information 403, The transaction information 402 and the back information fixed information 403b printed on the back surface of the receipt paper 151 in the fixed information 403 are stored in a distinguishable manner. The front surface fixing information 403a, the transaction information 402, and the back surface fixing information 403b developed as print data 408 in the image memory 217 are all composed of printing dots arranged in a grid pattern. By referring to the contents of the print data 408 stored in 217, the print length in the sheet length direction when each of the front surface fixing information 403a, the transaction information 402, and the back surface fixing information 403b is printed on the receipt paper 151 is determined. I can grasp it. In the present embodiment, the print length when the transaction information 402 or the fixed information 403 is printed on the receipt paper 151 is calculated based on the actual length in consideration of the number of dots or the resolution (dpi).

  Returning to the description based on FIG. As processing subsequent to step S202, the information processing unit 201 transmits a print data division command for dividing the print data 408 stored in the image memory 217 into the front surface print data 406 and the back surface print data 407 to the receipt printer 107. (Step S203). Upon receiving the print data division command transmitted from the POS terminal 101, the control unit 215 of the receipt printer 107 receives the print data 408 composed of grid-like print dots stored in the image memory 217 on the receipt paper 151. The length in the direction of the paper length when printed is grasped, and half of the print data 408 stored in the image memory 217 is assigned as the front print data 406 and the remaining half is assigned as the back print data 407. To do. More specifically, the control unit 215 of the receipt printer 107 according to the present embodiment includes the print length Y1 of the surface fixing information 403a, the print length Ya of the transaction information 402, and the print length Ya stored in the image memory 217 as the print data 408. The print length Y2 of the back surface fixed information 403b is grasped, and the print length (Ya- (Y1-Y2)) from the top of the print data 408 expanded from the front surface fixed information 403a and the print data 408 expanded from the transaction information 402 is displayed. ÷ Only print data 408 of 2 is extracted and stored in the image memory 217 as surface print data 406. Similarly, the control unit 215 of the receipt printer 107 subtracts the amount applied to the front surface print data 406 from the print data 408 expanded from the back surface fixed information 403b and the print data 408 expanded from the transaction information 402. The data 408 is extracted and stored in the image memory 217 as back side print data 407 (see FIG. 11 for Y1, Y2, and Ya). The control unit 215 of the receipt printer 107 distributes the print data 408 to the front surface print data 406 and the back surface print data 407, and the print data 408 in the print data 408 serving as a boundary for dividing the front surface print data 406 and the back surface print data 407 is used. It is determined whether or not one line (horizontal direction in FIG. 11) is composed of dots that are not applied. When it is determined that a part of the dots to be applied is included, the control unit 215 of the receipt printer 107 prints characters and graphics printed on the receipt paper 151 when the print data 408 is divided before and after the determined line. Therefore, the print data 408 is not divided by the line, and the same determination is performed for the line next to the determined line. When the control unit 215 of the receipt printer 107 determines that one line in the print data 408 to be determined is configured by dots that are not applied, the print data 408 is before and after the determined line. Since the characters and graphics to be printed on the receipt paper 151 are not divided even if they are divided, the print data 408 is divided into the front surface print data 406 and the back surface print data 407 with the determined line as a boundary.

  As a subsequent process, the information processing unit 201 transmits a print command for printing on the receipt paper 151 to the receipt printer 107 (step S204), and ends the receipt issuing process, as in the above-described embodiment. Upon receiving a print command from the POS terminal 101, the control unit 215 of the receipt printer 107 cuts the printing end of the receipt paper 151 printed on both sides, and discharges the cut receipt paper 151 as a receipt RT.

  Similarly to the POS device 100 of the embodiment described above with reference to FIGS. 1 to 8, the receipt POS with a small margin W and a reduced overall length is also issued by the POS device 100 of the present embodiment. As a result, the consumption of the receipt paper 151 is eliminated, and the receipt paper 151 can be used effectively.

  In the POS device 100 according to the present embodiment, the process of allocating the print data 408 to the front surface print data 406 and the back surface print data 407 is performed by the control unit 215 of the receipt printer 107. However, as another embodiment, After the information processing unit 201 of the POS terminal 101 acquires the print data 408 in the image memory 217 provided in the receipt printer 107 and grasps the print length of the print data 408 acquired by the information processing unit 201, the information of the POS terminal 101 is obtained. The processing unit 201 designates the respective print lengths after the print data 408 developed from the transaction information 402 is divided into the front side print data 406 and the back side print data 407, and transmits a print data division command to the receipt printer 107. You may make it do. As yet another embodiment, the information processing unit 201 of the POS terminal 101 expands and stores the front surface fixing information 403 a, the transaction information 402, and the back surface fixing information 403 b in the RAM 203 with the print data 408, and the print data 408 stored in the RAM 203. Is divided into front surface print data 406 and back surface print data 407 based on the print length, and the divided front surface print data 406 and back surface print data 407 are transmitted to the receipt printer 107, from the front surface thermal head 153s of the receipt printer 107. The front side print data 406 may be printed on the front side of the receipt paper 151, and the back side print data 407 may be printed on the back side of the receipt paper 151 from the back side thermal head 154 s of the receipt printer 107.

  Next, still another embodiment will be described with reference to FIGS. In this case, the same parts as those in the embodiment described with reference to FIGS. 1 to 8 are denoted by the same reference numerals, and the description thereof is also omitted.

  FIG. 12 is a schematic diagram showing an outline of the internal configuration of the receipt printer 107 in the present embodiment. FIG. 13 is a schematic diagram showing an example of a receipt RT issued without performing backfeed when the receipt printer 107 shown in FIG. 12 performs printing on both sides of the receipt paper 151. The front surface printing unit 153 according to the present embodiment is disposed on the downstream side of the guide path 156 with respect to the back surface printing unit 154. The position of the heating resistor 153 h of the front thermal head 153 s constituting the front surface printing unit 153 and the heating resistor 154 h of the rear thermal head 154 s constituting the rear surface printing unit 154 are a distance on the guide path 156 by Δx. is seperated. In other words, the front surface print position J where the front surface thermal head 153s prints on the front surface of the receipt paper 151 and the back surface print position K where the back surface thermal head 154s prints on the back surface of the receipt paper 151 are the guide path 156. They are spaced apart by a separation distance Δx. Therefore, when the control unit 215 of the receipt printer 107 prints on both sides of the receipt paper 151, the receipt paper 151 is conveyed upstream (so-called back feed) to the front and back of printing on the front surface of the receipt paper 151. When the position adjustment for aligning with the leading edge of printing is not performed, the POS device 100 has a margin area V having a distance Δx in the paper length direction at the leading edge of the back surface of the receipt paper 151 as shown in FIG. The received receipt RT is issued. The POS device 100 according to the present embodiment prints in the blank area V that may occur in the receipt RT because the front surface thermal head 153s and the back surface thermal head 154s are separated from each other, thereby wasting consumption of the receipt paper 151. This is intended to effectively use the receipt paper 151.

  FIG. 14 is a schematic diagram showing the data structure of the format file F of the present embodiment. The print object 301b stored in the format file F includes a head object 301c. The head object 301c forms part of the back surface fixed information 403b. The leading object 301c is configured to include a predetermined message and a blank line, and is printed on the back surface of the receipt paper 151 by the back surface thermal head 154s, and in the leading region from the leading end of the receipt RT to a position separated by Δx upstream. This is the fixed top information HDR to be printed (see FIG. 17). In the format file F, the number of lines 304 of the first object 301c is stored such that the size of the receipt paper 151 in the line direction when the first object 301c is printed on the receipt paper 151 is Δx. Has been.

  In addition, among the print objects 301b stored in the receipt paper 151, the current point display object 301d to be printed on the back surface of the receipt paper 151 following the head object 301c is displayed in the merchandise sales data processing apparatus (see FIG. 15). The value of the customer's current accumulated points calculated in the point calculation process (step S16-3 in FIG. 15) is reflected.

  FIG. 15 is a flowchart showing a flow of merchandise sales data processing performed in the POS device 100 of the present embodiment. The information processing unit 201 of the POS terminal 101 is on standby for determining whether or not a product code has been input by an input operation from the code scanner 212, the keyboard 211, and the touch panel 105 (step S11). When the input of the product code is determined (Y in step S11), the information processing unit 201 of the POS terminal 101 executes a search process for acquiring product information such as a product name and a unit price corresponding to the input product code from the PLU file. (Step S12), transaction information is generated based on the input product code and the acquired product information, and a product information registration process for temporarily storing it in the RAM 203 (see FIG. 3) is executed (Step S13).

  As a subsequent process, the information processing unit 201 of the POS terminal 101 waits for a product code input end declaration input from the touch panel 105 or the keyboard 211 (step S14). When the product code input end declaration is input, the information processing unit 201 of the POS terminal 101 executes a point calculation process as a subsequent process (step S16). If it is determined that a new product code is input instead of a product code input end declaration (N in step S14, Y in S15), the information processing unit 201 of the POS terminal 101 returns the process to step S12 to newly Based on the input product code, search processing (step S12) and product information registration processing (step S13) are executed.

  Details of the point calculation process (step S16) will be described. The information processing unit 201 of the POS terminal 101 determines whether or not the member code is stored in the RAM 203 (step S16-1). The member code is code information for specifying a customer stored in advance in a storage medium such as a magnetic card or IC card owned by the customer, and the information processing unit 201 of the POS terminal 101 performs point calculation processing (step S16). Is read by a reading device (not shown) such as a magnetic card reader or IC card reader connected to the POS terminal 101 and stored in the RAM 203 until a product code input end declaration is input. It should be. For this reason, in the POS terminal 101 of this embodiment, a reader such as a magnetic card reader or an IC card reader needs to be connected to the information processing unit 201. If the information processing unit 201 of the POS terminal 101 determines that the member code is not stored in the RAM 203 (N in step S16-1), the processing of steps S16-2 and S16-3 described below is performed. The point calculation process (step S16) is finished without any processing, and the process proceeds to step S17. On the other hand, if the information processing unit 201 of the POS terminal 101 determines that the member code is stored in the RAM 203 (Y in step S16-1), the accumulated point information stored corresponding to the member code is displayed. The acquisition process is executed (step S16-2). The process of acquiring the accumulated point information is performed when the storage medium is a magnetic card that does not store the accumulated point information but stores only the member code, and the IC card that stores the accumulated point information and the member code. The processing contents differ depending on the case. When the storage medium is a magnetic card, the information processing unit 201 of the POS terminal 101 transmits a member code to a headquarter server (not shown) connected to the network via the communication interface 207 (see FIG. 3), and corresponds to the member code. The POS terminal 101 acquires the accumulated point information transmitted from the headquarter server by having the accumulated point information stored in the headquarter server transmitted. On the other hand, when the storage medium is an IC card, the information processing unit 201 of the POS terminal 101 can directly access the accumulated point information recorded in the IC card. As processing subsequent to the acquisition of the accumulated point information in this way, the information processing unit 201 of the POS terminal 101 calculates a privilege point given to the current accounting transaction based on the transaction information temporarily stored in the RAM 203. (Step S16-3), the point calculation process is terminated.

  The information processing unit 201 of the POS terminal 101 executes the above point calculation process (step S16 (steps S16-1 to S16-3)), thereby accumulating the bonus points given in the current accounting transaction. You will know the point.

  As processing subsequent to step S16, the information processing unit 201 of the POS terminal 101 waits for input of a transaction end declaration from the touch panel 105 or keyboard 211 specified together with the input of the customer's payment amount (step S17). When an end declaration is input (Y in step S17), a settlement process for performing settlement for the subtotal amount calculated based on the transaction information stored in the RAM 203 is executed (step S18), and a merchandise sales data process is performed. Exit. The settlement process includes a receipt issuance process and a cumulative point update process. The flow of the receipt issuing process in the POS device 100 according to the present embodiment will be described later with reference to FIG. 16, but information related to the customer accumulated points calculated in the point calculation process (step S 16) is printed on the receipt paper 151.

  The update process is a process of updating the accumulated point information given to the customer by adding the privilege points newly given to the customer by the current accounting transaction. When the storage medium is a magnetic card, the information processing unit 201 of the POS terminal 101 transmits the benefit points calculated this time to the headquarter server as an update process. When the headquarters server receives the privilege points, the headquarters server updates the received privilege points with the accumulated point information. On the other hand, when the storage medium is an IC card, the information processing unit 201 of the POS terminal 101 is stored in the IC card as an update process in addition to the process of transmitting the current privilege point to the headquarter server. Update accumulated point information.

  If the information processing unit 201 of the POS terminal 101 determines in step S16-1 that the member code is not stored in the RAM 203, the information processing unit 201 of the POS terminal 101 displays information related to privilege points in the receipt issuing process. Printing is not performed on the receipt paper 151, and update processing is not performed.

  FIG. 16 is a flowchart showing the flow of receipt issue processing in the POS device 100 of the present embodiment. FIG. 17 is an explanatory diagram showing an example of the receipt paper 151 in a state where printing is performed by the receipt issuing process performed in the POS device 100 of the present embodiment. When starting the receipt issuing process, the information processing unit 201 of the POS terminal 101 prints the printing length L1 of the front surface fixing information 403a and the back surface fixing information 403b as in the embodiment described above with reference to FIGS. The length L2 is calculated (step S301), the print length when the transaction information 402 is printed on the receipt paper 151 is calculated (step S302), and the output information 401 including the transaction information 402 and the fixed information 403 is output to the receipt RT. It distributes to each of the front surface output information 404 and the back surface output information 405 so that the length becomes the shortest (step S303).

  As the subsequent processing, the information processing unit 201 of the POS terminal 101 prints from the front end of the receipt paper 151 as a part of the front side of the data row of the back surface output information 405 distributed in step S303, and starts fixed information HDR. The data of the head object 301c appearing as “is moved to the end of the back surface output information 405 (step S304). The data moved to the end of the back surface output information 405 is printed on the receipt paper 151 and becomes part of the print contents of the receipt RT issued in the next transaction.

  As a subsequent process, the information processing unit 201 of the POS terminal 101 branches the process depending on whether or not the printing process to be performed is performed for the first time after the receipt sheet 151 wound around the sheet holding unit 152 is set (step S1). S305). If the printing process to be performed is performed for the first time after the receipt paper 151 is set (Y in step S305), nothing is printed on the front end side of the back surface of the receipt paper 151. Therefore, the information processing unit 201 of the POS terminal 101 transmits the leading object 301c (step S306), drives the conveyance mechanism 160 to position the leading edge of the receipt paper 151 at the back surface printing position K, and then starts the leading edge from the back surface printing unit 154. A control command for printing the object 301c is transmitted to the receipt printer 107 (step S307). As a result, as shown in FIG. 17A, the leading fixed information HDR occupying the size of Δx as the print length is printed on the leading end side of the back surface of the receipt paper 151. As a subsequent process, the information processing unit 201 of the POS terminal 101 transmits the front surface output information 404 and the rear surface output information 405 to the receipt printer 107 in the same manner as the above-described embodiment based on FIGS. The printing is performed on both sides (step S308), and the receipt issuing process is terminated.

  Upon receipt of the front surface output information 404 and the rear surface output information 405 transmitted in step S308 during the receipt issuance process performed by the POS device 100, the receipt printer 107 according to the present embodiment drives the conveyance mechanism 160 to guide the receipt. The receipt paper 151 on the path 156 is transported from the upstream side to the downstream side, in which printing on the front surface of the receipt paper 151 by the front thermal head 153s and printing on the back surface of the receipt paper 151 by the back thermal head 154s. And simultaneously. Here, since the front surface printing position J and the back surface printing position K are separated by Δx, the information processing unit 201 of the POS terminal 101 is connected to the receipt printer 107 as shown in FIG. In the middle of transporting the receipt paper on the guide path 156 from the upstream side to the downstream side by driving 160, it is synchronized with the printing on the front surface of the receipt paper 151 by the surface thermal head 153s, and on the back surface of the receipt paper 151. A command for driving the receipt printer 107 is transmitted so that the back surface thermal head 154s prints the content upstream of the printing position where the front surface thermal head 153s is printing in the printed back surface output information 405 by a separation distance Δx. Since the data for the separation distance Δx from the head of the back surface output information 405 has moved to the end side of the back surface output information 405, the receipt printer 107 simultaneously outputs the surface output information 404 on the surface of the receipt paper 151. The leading fixed information HDR appearing on the leading end side of the receipt paper 151 issued at the time of the next accounting transaction is printed on the end side of the back surface of the receipt paper 151.

  On the other hand, if the printing process to be performed in step S305 is not performed for the first time after the receipt paper 151 is set (N in step S305), the information processing unit 201 of the POS terminal 101 does not execute the processes in steps S306 and S307. The process of S308 is executed. However, in the receipt issuance process performed in the previous merchandise sales data process, the top fixed information HDR has already been printed on the leading end side of the back side of the receipt paper 151, so it is necessary to perform the processes of steps S306 and S307 in the first place. Absent. That is, a part of the back surface output information 405 is also printed in the margin area V of the receipt RT that is generated because the front surface printing position J and the back surface printing position K are separated by the distance Δx. Become.

  Similarly to the POS apparatus 100 of the above-described embodiment, the POS apparatus 100 of the present embodiment also issues a receipt RT with a reduced margin and a reduced overall length. Effective use of the paper 151 can be achieved. Furthermore, according to the POS device 100 of the present embodiment, the back surface thermal head 154s in the previous transaction is located in the margin area V that occurs because the front surface print position J and the back surface print position K are separated. In the receipt issuing process, the receipt fixed sheet HDR is used because the fixed header information HDR printed by the above is printed and used as part of the print contents of the receipt RT issued in the current transaction. There is no need to control the transport mechanism 160 that feeds back to the upstream side, the time until the receipt RT is issued can be shortened, and the entire accounting work performed using the POS device 100 can be shortened. .

  In the POS device 100 according to the present embodiment, the case where the front thermal head 153s is arranged on the downstream side of the guide path 156 with respect to the rear thermal head 154s is shown. However, the front thermal head 153s is the rear thermal head. Needless to say, the receipt paper 151 can be effectively used by printing in advance on the blank area V even when it is arranged upstream of the guide path 156 with respect to 154s. The head fixed information HDR printed in advance for the margin area V is the print data positioned at the head of the back surface print data 407 output on the back surface of the receipt paper 151 among the print data expanded in the image memory 217. By moving to the end of the print data 407, printing may be performed downstream from the cutting position of the receipt paper 151. Furthermore, the receipt issuing process shown in the present embodiment may be performed not by the information processing unit 201 of the POS terminal 101 but by the control unit 215 of the receipt printer 107.

It is a perspective view which shows the external appearance of a POS apparatus. It is a schematic diagram which shows the outline of an internal structure of a receipt printer. It is a block diagram which shows the electric constitution of a POS apparatus. It is a schematic diagram which shows the data flow until output information is printed on both surfaces of a receipt paper. It is a schematic diagram which shows the data structure of a format file. It is a schematic diagram which shows an example of the receipt on which the output information reflecting the content of the format file was printed. It is a flowchart which shows the flow of a receipt issue process. It is explanatory drawing which shows an example of the receipt issued by a POS apparatus. It is a schematic diagram which shows the data flow until output information is printed on both surfaces of a receipt paper. It is a flowchart which shows the flow of a receipt issue process. It is a schematic diagram which shows the data structure of the print data memorize | stored in an image memory. It is a schematic diagram which shows the outline of an internal structure of a receipt printer. FIG. 5 is a schematic diagram illustrating an example of a receipt issued without performing backfeed when a receipt printer performs printing on both sides of a receipt sheet. It is a schematic diagram which shows the data structure of a format file. It is a flowchart which shows the flow of a merchandise sales data process. It is a flowchart which shows the flow of a receipt issue process. It is explanatory drawing which shows an example of the receipt paper in the state printed by the receipt issuing process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... POS apparatus (commodity sales data processing apparatus), 107 ... Receipt printer, 111 ... Paper discharge port (paper discharge part), 151 ... Receipt paper, 152 ... Paper holding part, 153s ... Surface thermal head (1st print head) 154 s ... back side thermal head (second print head), 156 ... guide path, 160 ... transport mechanism, 217 ... image memory, 401 ... output information, 402 ... transaction information, 403 ... fixed information, RT ... receipt, Δx ... separation distance

Claims (4)

In a merchandise sales data processing apparatus that executes merchandise sales data processing including storage of transaction information for each transaction and issuance of a receipt printed with the transaction information.
Printing on one side of the receipt paper transported along the guide path, and a transport mechanism for transporting the receipt paper in the length direction along the guide path communicating between the paper holding unit and the paper discharge unit A receipt printer comprising: a first print head for performing printing and a second print head for performing printing on the other surface;
The receipt printer is driven and controlled in accordance with the declaration of the end of one transaction, and the fixed information whose printing position and print length are determined in advance is printed on the receipt paper, and the receipt length of the one transaction is the shortest. Means for distributing the transaction information to one side and the other side of the receipt paper so as to be printed on an area other than the printing area of the fixed information occupied in the receipt;
A product sales data processing device comprising: By distributing the transaction information to one side and the other side of the receipt paper based on the number of print lines of the transaction information, the receipt length of one transaction is minimized.
The merchandise sales data processing apparatus according to claim 1. An image memory for developing and storing print data for one transaction printed by the first print head and the second print head;
By allocating half of the print data developed in the image memory to printing by the first print head and allocating the other half to printing by the second print head, the length of a receipt for one transaction is minimized. To
The merchandise sales data processing apparatus according to claim 1. The first print head and the second print head are arranged with the printing positions spaced apart from each other on the upstream side in the conveyance direction of the receipt paper in the guide path;
Fixed information that is printed last on the receipt paper by the print head whose upstream position is arranged according to the declaration of the end of one transaction is fixed information that occupies the top position of the receipt for the next transaction To use,
The merchandise sales data processing apparatus according to any one of claims 1 to 3, wherein

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