JP2001088378A - Ink-jet printer for cash register - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink-jet printer for cash register which can print receipt printing information with a high quality at high speed and low noise. SOLUTION: In the ink-jet printer for cash register, a receipt paper 110 as a continuous form paper can be transferred along a paper transfer direction Xr by upstream side transfer rollers, and downstream side transfer rollers 52D and 55D. At the same time, ink dots are jetted to the lower receipt paper 110 from an ink-jet printing head 40 set to a printing position P1 in the middle of the transfer direction, so that receipt printing information can be printed to the paper. A distance from the printing position P1 to the downstream side transfer rollers 52D and 55D is selected to be not smaller than a length in the paper transfer direction Xr of a maximum logotype 115 included in the receipt printing information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink-jet printer for cash register which can print receipt print information on a receipt paper using an ink-jet print head.

[0002]

2. Description of the Related Art For example, an electronic cash register type merchandise sales data processing device used independently or as a terminal of a POS system (in this specification,
Hereinafter, it is simply referred to as a “register”. In), the merchandise purchased for the customer is registered, and the accounting process is performed on condition that the closing operation of the one transaction end declaration is performed. Receipt print information including registered merchandise information and account processing information is edited and printed on receipt paper by driving and controlling a cash register printer. Then, the cut receipt is issued and handed to the customer.

Conventionally, as a cash register printer, when a thermal printer is adopted, receipt paper (thermal paper) which is a consumable item is used.
Because of their high cost, printers employing a dot impact type print head using a needle are often used.

[0004]

In recent years, receipts have become more and more useful. For example, a customer may read receipt print information from a receipt and key-input the receipt print information to a home personal computer, or read and input the receipt print information using an OCR to manage a household account book. The same applies to slips. Therefore, clear and high-quality printing of receipt print information and slip information on receipts and slips has been strongly desired.

[0005] On the other hand, both the cashier and the customer have large noise when printing with the dot impact printer. That is, improvement in use environment is desired. In the conventional structure in which a printer including a paper transport mechanism is incorporated in the main body of the cash register, the cash register itself can be miniaturized by computerization, but the printer occupies a large space. It is a factor to prevent.

[0006] Further, there is an increasing demand for effective use (use) of a receipt handed to each customer for an advertisement medium of the store or the like. With the enhancement of the printing function, for example, a special sale product or a new arrival product is appealed as high-density character information or monochrome / color image information. For example, you want to print a logo to the full width of the receipt paper.

An object of the present invention is to provide an ink-jet printer for a cash register which can print high-quality, high-speed, low-noise receipt printing information on receipt paper by using an ink-jet printing head.

[0008]

If an ink jet print head is adopted, receipt print information can be printed on receipt paper with high image quality at high speed and with low noise. Also,
Since non-contact printing can be performed on both the receipt paper and the slip, it is possible to achieve high-speed printing of the receipt paper and the slip in the same printing area using the same ink jet print head and to achieve downsizing.

[0009] However, adoption of the ink jet print head requires ink drying time. In particular, it can be said that the ink drying time when printing the logo in the receipt print information should be considerably long because the logo is composed of graphic information of high-density ink dots. However, if the customer's receipt is to be printed after the customer's transaction, the printing speed must be reduced to ensure sufficient ink drying time for logo printing. In this case, the customer waiting time becomes long.

[0010] The present invention is designed to make it possible to exhibit the benefits of using an ink jet print head, to solve the disadvantages (securing the ink drying time) due to its adoption, and to shorten the customer waiting time. is there.

That is, according to the first aspect of the present invention, there is provided an ink jet print head which is capable of conveying a receipt sheet by an upstream conveying roller and a downstream conveying roller along a sheet conveying direction and is mounted at a printing position in the middle of the sheet conveying direction. Forming the receipt print information printable while jetting ink dots on the lower receipt paper, the distance from the printing position to the downstream transport roller is included in the receipt print information, and the paper transport direction of the logo printed on the receipt paper It is an ink-jet printer for cash register selected to be longer than the length.

In this invention, the continuous paper, that is, the receipt paper is transported in the paper transport direction by the upstream transport roller and the downstream transport roller. Then, the ink jet print head mounted at the print position in the middle of the paper transport direction is driven to print the receipt print information while jetting the ink dots on the lower receipt paper. After printing, the receipt paper portion is conveyed to a downstream conveyance roller and thereafter and cut by a cutter to issue a receipt.

Since the distance from the printing position to the downstream transport roller is selected to be longer than the length of the logo included in the receipt print information in the paper transport direction, for example, the next customer immediately follows the receipt print of the current customer. A logo to be printed can be printed on the receipt and can be kept waiting between the printing position and the downstream transport roller.

Therefore, it is possible to print the receipt print information on the receipt paper at high quality and at a high speed with low noise, and to properly and sufficiently secure the ink drying time, so that a beautiful receipt free of ink stains printed with various logos is issued. it can.

[0015] Further, the invention according to claim 2 is characterized in that the logo printed on the receipt for the current customer is the receipt for the current customer after the printing of the receipt print information of the previous customer and before the commencement of product registration for the current customer. This is an ink-jet printer for cash register formed to be able to print on paper.

In this invention, the logo to be printed on the receipt for the next customer is printed on the receipt paper for the next customer from the time when the receipt printing of the current customer is completed to the time when the receipt printing of the next customer transaction data is possible. The semi-dry ink (logo) printed in this way is waited (within a distance) between the printing position selected to be longer than the length of the logo included in the receipt print information in the paper transport direction and the downstream transport roller. You.

Therefore, in addition to providing the same operation and effect as in the case of the first aspect of the present invention, the receipt can be printed only by printing receipt print information (character information) except the logo printed on the customer receipt this time. Because it can be issued, the waiting time until the receipt of the customer's receipt this time can be greatly reduced. In addition, the receipt printing information (excluding logo) of the second customer can be printed immediately (sequential printing method) as the transaction procedure progresses, so it is stored in a buffer and printed at once when all the receipt printing information is completed The buffer can be omitted as compared with the case of the above-described method, and the speeding up of printing can be promoted from this point as well.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

The ink-jet printer 20 for a cash register includes:
As shown in FIGS. 1 to 5, the upstream transport roller (52U,
55U) and the downstream transport rollers (52D, 55D) can transport the receipt paper 110, which is continuous paper, along the paper transport (Xr) direction and at the printing position P1 in the middle of the paper transport direction.
The inkjet print head 40 attached to the printer prints receipt print information while jetting ink dots onto the lower receipt paper 110, and the distance from the print position P1 to the downstream transport rollers (52D, 55D) is used for receipt print. The maximum logo (115) included in the information is selected to be longer than the length in the paper transport (Xr) direction.

In the case of this embodiment, the printer 20 is connected to the electronic cash register (register) 10 shown in FIG. 1 via a cable 10C, and prints receipt print information associated with merchandise registration and accounting processing on the receipt (110). And the slip information is printed on the slip 120.

This electronic cash register 10 has the structure shown in FIG.
The control unit (CPU 1) shown in FIG.
1, ROM 12, RAM 13), HDD 18, keyboard 14, scanner 15, and cashier display 16A.
And a display 16 including a customer display 16B and an automatic release type drawer 17 are connected. 1
Reference numeral 9 denotes a printer driver (interface).

The drive control unit 80 of the printer 20
As shown in FIG. 6, a control unit 81 including an MPU and the like, a memory 82, a display unit 83 shown in FIG. 1, a button (switch)
The printer includes a unit 84, a motor driving unit 85, a sensor unit 86, and a cutter unit 38, and controls each of the information received from the electronic cash register 10 to drive the inkjet print head 40 to print the information on each of the sheets (110, 120). 88
Is an interface.

As shown in FIG. 1, the printer 20 is provided with a roll paper accommodating section 27 on the rear side of the printer main body 21 (upper body 23, lower body 25) and a slip insertion section (slip discharge section) on the front side. ) 25S and a receipt issuing section 25R.

The slip 120 is the slip insertion unit 2 in FIG.
5S is inserted through the gap 25H between the upper body 23 and the lower body 25, and while the slip information is being printed, the leading end side thereof is temporarily held on the upper lid 24 covering the opening of the roll paper storage unit 27, and the slip is discharged after the printing is completed. It is discharged from the section 25S. That is, the cashier can handle the receipt (110) and the slip 120 on the spot (front side).

In FIG. 2 to FIG.
Is transported in the paper transport direction Xr by the paper transport rollers 52U and 55U disposed upstream (upper in FIG. 2 and right in FIG. 4) of the print area Ap shown in FIG.
And paper transport rollers 52D and 55D disposed on the downstream side (the lower side in FIG. 2 and the left side in FIG. 4).

Upstream paper transport rollers 52U and 55
Since U does not contact the printing surface (upper surface) of the receipt paper 110, it is formed of one roller element (52U / 55U) provided at the center in the left-right direction of each shaft 51U / 53U. In addition, a structure in which a plurality (two or more) of roller elements are arranged on each shaft 51U / 53U may be adopted.

The downstream paper transport rollers 52D and 55
D can come into contact with the printing surface (upper surface) of the receipt paper 110. Therefore, each of the two roller elements 52EDL.
55EDL, 52EDR and 55EDR.

That is, allowance for arrangement, receipt paper 1
3 and the character string (character information) 114 of FIG. 3 included in the receipt print information, the ink dries quickly, but the logo mark (logo) 115 composed of an image having a high ink dot density is determined due to the relationship between the ink composition 10 and the properties of the ink and the transport speed. In consideration of the possibility that ink drying will be delayed, two inner roller elements 52EDL / 55EDL / 52EDR / 52EDL / 52EDR / 55EDL / 55EDL of each paper transport roller 52D / 55D that are separated in the receipt paper width (110W) direction.
The inner space Wr of 55 EDR shown in FIG. 2 is arranged on each of the shafts 51D and 53D as exceeding the logo mark width 115W in the receipt print information printed on the receipt paper 110.

For example, when the transport speed is very high, the inner two roller elements 52EDL / 55EDL,
The inner space Wr between 52EDR and 55EDR is set to the character string 11 in the receipt print information printed on the receipt paper 110.
More than four rollers may be provided on each of the shafts 51D and 53D, and three or more paper transport rollers may be further provided in the paper transport direction Xr.

Each of the paper transport rollers 52U and 55
U, 52D / 55D (52EDL / 55EDL, 52E
DR / 55EDR) is arranged such that the non-printing surface (lower surface) 111 of the receipt paper 110 faces the ink jet print head 40 and can contact the print guide surface 29 shown in FIG. The print guide surface 29 is actually longer in the left-right direction than the left-right size shown in FIG. 4 and is also used as a paper guide when the receipt paper 110 is inserted. In this sense, it can be said that it is a sheet insertion guide surface.

Further, the upstream paper transport roller 52U.
55U and the downstream paper transport rollers 52D and 55D (5
2EDL.55EDL, 52EDR.55EDR) are formed so that the receipt paper 110 can be conveyed while applying tension in the paper conveyance direction Xr.

That is, the downstream paper transport roller 52D
The 55D peripheral speed is the upstream paper transport roller 52
It is slightly faster than the peripheral speed of U · 55U.
Further, when the tension of the downstream paper transport rollers 52D and 55D is out of the predetermined range, the tension can be returned to the predetermined range by a sliding action of a one-way clutch (not shown). Therefore, the receipt paper 110 can be conveyed without slack or unevenness.
Even if it is not in contact with 0, high quality and clear printing can be performed.

Here, in order to respond to the request to print the maximum logo (115) shown by the solid line in FIG. 3 to the full width of the receipt paper 110 as shown by the two-dot chain line in FIG. The distance from the printing position P1 shown in FIG. 5 to the downstream-side transport rollers (52D, 55D) is determined by the paper transport (X) of the maximum logo (115) included in the receipt print information.
It is selected to be longer than the length in the r) direction. 38C is a cutter that forms a part of the cutter unit 38.

That is, the paper guide surface (29) from the intersection point Qp (printing position) of the line segment P1-0 and the receipt paper 110 to the intersection point (roller contact position) of the line segment Pr-O in FIG.
Is longer than the length (dimension) of the maximum logo (115) in the paper transport (Xr) direction. Therefore, even if the logo width is equal to or larger than the roller-to-roller dimension (Wr) in FIG. 2, the printed logo (115) is not transferred to the downstream transport rollers 52D (52EDL, 52EDR) and 55D (5D).
5EDL, 55EDR).

Therefore, not only is the receipt paper 110 not stained with ink, but also the downstream transport roller 52D
(52EDL, 52EDR), 55D (55EDL, 5
Since no ink adheres to 5EDR), the next receipt paper is not stained.

In connection with this, in this embodiment,
The control unit 81 receives the receipt print information (ST1 in FIG. 7).
If it is 0 (YES), the receipt print information is temporarily stored in the memory (ST11). Note that the logo (115) in the receipt print information may be set and stored in the printer 20 from the beginning, and may be constructed such that character information and the like can be received from the cashier 10 side.

Thereafter, the receipt paper 110 is conveyed so that the current customer's portion is at the printing position P1 (ST12), and the ink jet print head 40 is driven to drive the character information (11).
4) is printed (YES in ST13 and ST14). After all the information is completed (YES in ST15), cutting is performed by the cutter (38) (ST16), and the receipt is discharged (ST17). That is, a customer receipt is issued this time.

On this receipt for the customer, the logo (115) that has been printed after the receipt for the customer is printed. That is, the logo printing time is not the printing waiting time for the customer this time.

That is, following the printing of the present customer receipt, the controller 81 prints the next customer's logo (115) while transporting the receipt paper 110 in the paper transport direction (ST18 in FIG. 8) (ST19). , STE YE
S, YES in ST21). In this way, the preprinted logo is transferred from the printing position P1 to the downstream transport roller 52.
D (52EDL, 52EDR), 55D (55EDL,
Until 55 EDR), the apparatus is on standby in a natural ink drying state.

On the other hand, the slip transport device 60 for transporting the slip 120 includes slip transport rollers 62U and 65U arranged downstream of the print area Ap shown in FIG. 2 (upstream in the receipt paper 110). And slip transport rollers 62D and 65D disposed on the upstream side (downstream side of the receipt paper 110).

Each of these slip transport rollers 62U and 65
U, 62D and 65D are paper transport rollers 52U and 55U, 52D and 55D constituting the paper transport device 50, respectively.
(52EUL / 55EUL, 52EDR / 55EDR)
It is arranged in the space. Non-continuous paper (slip 120) whose rigidity is often greater than the rigidity of receipt paper 110,
This is to ensure more reliable and stable transport.

Upstream slip transport rollers 62D and 65
D denotes two rollers distributed in the left and right directions of the shafts 61D and 63D at an inner interval Ws shown in FIG. 2 in order to prevent contact with the printing surface (upper surface) of the receipt paper 110. Element 62EDL / 65EDL, 62ED
R.65EDR.

Similarly, the downstream slip transport roller 62
U · 65U is used to ensure the secure conveyance of the voucher 120 having a high rigidity and the printing surface (upper surface) of the receipt paper 110.
The two roller elements 62EUL are spaced apart (distributed and arranged in the left-right direction) with an inner space Ws in the left-right direction of the shafts 61U and 63U in order to prevent contact with the shafts 61U and 63U.
65EUL, 62EUR and 65EUR.

Further, the downstream slip transport rollers 62U.
65U (62EUL / 65EUL, 62EUR / 65E
UR) and upstream slip transport rollers 62D and 65D (6
2EDL / 65EDL, 62EDR / 65EDR) are formed so as to be conveyable while applying tension to the form 120 in the form conveyance direction (Xs1, Xs2). A tension is applied when the slip information is transported in the normal transport direction Xs1 for printing on the slip 120.

That is, the downstream slip transport roller 62U
・ 65 U peripheral speed is the upstream slip transport roller 62
The speed is slightly higher than the peripheral speed of D · 65D.
The symbols U (upstream) and D (downstream) attached to each transport roller (roller element) are defined with respect to the transport direction Xr of the receipt paper 110 as described above. Accordingly, in the case of the slip 120, reference numerals D (upstream) and U (downstream) are given.

The downstream slip transport roller 62U
In the case of 65U, when the tension applied to the slip 120 is out of the predetermined range, the tension of the one-way clutch (spring clutch) can be returned to the predetermined range by the sliding action (the tension is maintained within the predetermined range). . Therefore,
Even a slip 120 having higher rigidity than the receipt paper 110 can be conveyed without slack or unevenness, so that high-quality and clear printing can be performed without contacting the inkjet print head 40.

Each slip transport roller 62U / 65
U, 62D and 62D, two inner roller elements 62 separated in the receipt paper width direction 110W shown in FIGS.
EUL / 65EUL, 62EUR / 65EUR, 62E
The inner space Ws of DL / 65EDL / 62EDR / 65EDR shown in FIG. 2 is arranged on each of the shafts 61U / 63U, 61D / 63D as exceeding the receipt paper width 110W. Therefore, the innermost 2 of each roller element
One does not directly contact the receipt paper 110. That is, the user does not touch the printed receipt print information (semi-dry ink).

Note that "the innermost two" means each innermost one in the left-right direction even if there are four or more roller elements for each one axis, for example.

Here, each paper transport roller 52U / 5
5U, 52D / 55D and each slip transport roller 62U /
As shown in FIG. 4, the vertical positional relationship between the receipt paper 110 and the receipt paper 110 above the receipt paper 110 that can be transported in the paper transport direction Xr.
Slip 1 while maintaining a certain clearance Csr with the upper surface of the
20 has been selected to be transportable.

That is, in addition to the planar separation shown in FIG.
Further, by establishing the vertical separation (Csr) shown in FIG. 4, each slip transport roller 62D, 65D, 62D
U ・ 65U and each paper transport roller 52D ・ 55D, 5
Interference with 2U / 55U can be reliably avoided even in the vertical direction.

Thus, not only is the printing surface (upper surface) of the receipt paper 110 not stained, but also the same printing area A
The two types of papers (110, 120) can be taken into p, and the slip transport rollers 62D, 65D, 62U, 65U can be arranged at positions outside the receipt paper transport area (110W), and the slip 120 is reversibly transported. Sometimes, each slip transport roller 62D / 65D, 62U / 65U does not transport the receipt paper 110.

In relation to this, the ink-jet characteristics of the ink-jet print head 40 are such that the clearance Chs (for example, 1.0 m) between the tip (lower surface) of the ink-jet print head 40 and the upper surface (print surface) of the slip 120 shown in FIG.
m) is ensured, and the printing quality may be selected so as to be able to maintain a constant printing quality within a vertical distance at least equivalent to a slip thickness of 120 t (for example, 0.09 mm). In this embodiment, the clearance Csr is set. Therefore, slip thickness 120
Clearance Csr corresponding to t (for example, 0.42 mm)
The print quality is selected so as to be able to maintain a constant print quality within the vertical distance to which is added. The thickness 11 of the receipt paper 110
0t is, for example, 0.08 mm.

That is, the upper surface (printing surface) of the receipt paper 110 and the lower surface (non-printing surface) of the voucher 120 can be reliably held in a non-contact state, and the voucher 12 can be held even if the clearance Csr is interposed.
Since the printing quality of the receipt paper 110 and the printing quality of the receipt paper 110 can be kept constant, the receipt surface 110 of the high-quality printing and the slip 120 can be issued and discharged without the printing surface of the receipt paper 110 being rubbed by the slip 120.

The ink jet print head 40 can reciprocate in the left and right direction (in the direction perpendicular to the paper surface in FIG. 4) along the guide rod 31 by the carrier moving mechanism 30 (guide rod 31, carrier 32) shown in FIG. is there. The carrier 32 includes an inkjet print head 40.
An ink cassette 45 for supplying ink to the printer is detachably provided.

Further, each slip transport roller 62D / 65D, 62U / 65U constituting the slip transport apparatus 60 is
It is formed so that it can be transported in reverse. That is, the slip 120 is
The paper can be forward-conveyed in the normal conveyance direction Xs1 opposite to the paper conveyance direction Xr, and after printing, the same reverse conveyance direction Xs2 as the paper conveyance direction Xr.
Can be transported in reverse.

More specifically, the slip transport roller 62U on the downstream side (upstream in the receipt transport direction Xr) in the forward transport.
The peripheral speed of 65U is faster than the peripheral speed of the slip transport rollers 62D and 65D on the upstream side (downstream in the receipt transport direction Xr) and the slip transport rollers 62U and 65U on the downstream side.
Can hold the tension in the slip paper feeding direction (Xs1, Xs2) within a certain range, and the downstream slip transport rollers 62U and 65U can be separated from a gear (planetary gear) as a driving source during reverse transport. ing.

In this embodiment, if the tension in the slip paper feeding direction applied to the slip 120 via a one-way clutch (spring clutch) including a sliding mechanism exceeds the predetermined range, the downstream slip transport rollers 62U and 65U are used. Idling due to sliding action. The one-way clutch may be incorporated in the downstream slip transport rollers 62U and 65U.

That is, the slip 120 is transferred to each of the slip transport rollers 62D and 65D, 62U and 65 on the upstream and downstream sides.
During the period of engagement with U, the peripheral speed of the downstream slip transport rollers 62U and 65U is changed to the upstream slip transport roller 6U.
Since the peripheral speed is higher than the peripheral speed of 2D / 65D, tension is applied to the slip 120 in the slip sheet feeding direction, and the downstream slip transport rollers 62U and 65U maintain the tension within a certain range. Therefore, printing can be performed in a state where there is no slack due to the constant tension, so that the printing quality can be further improved.

Further, at the time of reverse transport, the downstream slip transport rollers 62U and 65U are separated from the driving source and become rotatable (ST15), so that the peripheral speed difference does not adversely affect the slip 120. Therefore, the receipt (11
0) issuance section 25R and slip insertion section (slip discharge section) 25S.
Can be arranged in the same direction, so that handling is extremely easy and work efficiency can be improved.

In the ink jet printer for cash register 20 of this embodiment, the upper cover 24 shown in FIG. 1 is opened, and then the roll paper storage section 27 stores the rail paper 110R shown in FIG. Then, while pulling out the receipt paper 110 from the roll paper 110R with a curl, the leading end thereof is directed downward, passed between the upstream paper transport rollers 52U and 55U of the paper transport device 50, and further pressed.

The leading end thereof slides on the print guide surface (sheet insertion guide surface) 29 with the downward direction, and the downstream side paper transport roller 52D (52EDL / 52ED) disposed below.
R) and 55D (55DEL / 55EDR), and goes out of the receipt issuing unit 25R in FIG. The part that has come out is cut off with a cutter and removed. That is, the receipt paper 110 can be set in the paper transport device 50. The upper lid 24 is closed.

Thus, the receipt paper 11 which is continuous paper
0 is the paper transport roller (upstream transport roller) 52U / 55U on the upstream side (for example, the depth side) and the paper transport roller (downstream transport roller) 52 on the downstream side (front side).
D and 55D can be conveyed to the inkjet print head 40 side in the paper conveyance direction Xr. The receipt paper 110 is conveyed while applying tension. Since the lower surface thereof is in contact with the print guide surface 29, it can be transported without slack.

Therefore, the electronic cash register 10
When the receipt print information including the registered product data and the like is received from the printer (YES in ST10 of FIG. 7), the control unit 81 controls the ink jet print head 4 positioned in the print area Ap.
0 is driven to print the receipt print information (character information) (ST11 to ST13). After printing (YES in ST14, YES in ST15), the receipt paper 11
0 is conveyed to the downstream side, cut (ST16), and becomes a receipt (ST17). Thereafter, a logo for the next customer is printed (YES in ST18 to ST21 in FIG. 8).

Here, even while the receipt paper 110 is being transported, each of the slip transport rollers 62U, 65U and 6U
Two roller elements 62EUL, 62EUR · 65 each having 2D · 65D separated in the direction of receipt paper width 110W.
EUL, 65EUR and 62EDL, 62EDR.6
Since 5EDL and 65EDR are arranged on the same shaft 61/63, each slip transport roller 62U (62E) is used.
UL, 62EUR) / 65U (65EUL, 65EU)
R) and 62D (62EDL, 62EDR) ・ 65D
(65DEL, 65EDR) and each paper transport roller 5
2U, 55U and 52D (52EDL, 52EDR)
-Plane interference with 55D (55EDL, 55EDR) can be avoided.

That is, two types of paper (110, 120) can be taken in the same print area Ap, and the slip transport rollers 62U (62EUL, 62EUR) and 65U (65E).
UL, 65EUR) and 62D (62EDL, 62E)
DR) / 65D (65DEL, 65EDR) can be arranged at a position outside the receipt paper transport area (110W).
In addition, each slip transport roller 62U (62EUL, 62E
EUR) 65U (65EUL, 65EUR) and 6
2D (62EDL, 62EDR) ・ 65D (65DE
L, 65EDR) is the lower receipt paper 1 when the slip is transported.
10 is not transported.

On the other hand, in order to print the slip information on the slip 120 which is a non-continuous paper, the slip 120 is used as a flat guide with the slip inserting portion 25S shown in FIG.
In the slip transport direction (forward transport direction Xs
Push into 1). The left side of the slip 120 in FIG. 1 may be left protruding to the left of the printer main body 21.

Then, on condition that the leading end of the slip 120 is confirmed (detected), the controller 81 drives the planetary gear mechanism to move the planetary gears to the downstream slip transport rollers 62U.6.
5U, and the downstream slip transport roller 62U
65U is made to be rotatable and rotated forward together with the upstream slip transport rollers 62D and 65D. As a result, the inserted slip 120 can be forward-transported toward the inkjet print head 40 (forward transport direction Xs1).

When the leading end of the slip 120 is engaged with the downstream slip transport rollers 62U and 65U, tension is applied to the slip 120 in the slip transport direction (Xs1). At this stage, the ink jet print head 40 is driven, and the slip information is printed. The slip 120 is also line-fed during printing,
The sheet is conveyed in the normal conveying direction, and a part thereof is temporarily held on the upper lid 24 in FIG.

When printing is completed, the slip transport rollers 62U / 65U, 62D / 65D once stopped are reversed. After printing, the slip 120 can be reversely transported in the reverse transport direction Xs2. The lower surface of the slip 120 being transported does not contact the upper surface of the receipt paper 110 below.

Then, during the reverse transport, the rotation of the downstream slip transport rollers 62U and 65U is stopped to make them idle, and
The occurrence of a jam due to a peripheral speed difference between the upstream slip transport rollers 62D and 65D is prevented.

Therefore, thereafter, the slip 120 on which the slip information is printed by reversely transporting the slip 120 in the reverse transport direction Xs2 only by the upstream slip transport rollers 62D and 65D is transferred to the slip discharge unit 25S (original position). Let it drain. When the discharge is completed, each roller is stopped.

According to this embodiment, the receipt paper 110 is transported by the upstream transport rollers (52U, 55U).
And the downstream-side transport rollers (52D, 55D) can be transported along the paper transport (Xr) direction and are mounted at the print position P1 in the middle of the paper transport direction.
Receipt print information can be printed using 0, print position P1
Since the distance from to the downstream transport roller (52D, 55D) is included in the receipt print information and is selected to be equal to or greater than the length of the logo (115) printed on the receipt paper in the paper transport direction, the receipt paper 110 In addition to being able to print high-quality, high-speed, low-noise receipt printing information and skillfully and sufficiently securing the ink drying time, it is possible to issue a beautiful receipt free of ink stains printed with various logos.

The logo (115) to be printed on the receipt for the current customer is formed so that it can be printed on the receipt paper for the current customer after the printing of the receipt print information of the previous customer and before the registration of the product for the current customer is started. The receipt can be issued simply by printing the receipt print information (character information) excluding the printed logo on the customer receipt this time, greatly reducing the waiting time for the customer to receive the receipt this time. it can. In addition, the receipt printing information (excluding logo) of the second customer can be printed immediately (sequential printing method) as the transaction procedure progresses, so it is stored in a buffer and printed at once when all the receipt printing information is completed As compared with the case of the method in which the printing is performed, the buffer can be omitted, and from this point, the printing can be speeded up.

Further, it is possible to issue a receipt (110) in which receipt print information is printed at a high speed in the same print area Ap by using the same ink jet print head 40, and to print the slip information on the slip 120 at a high speed. In addition, various print target information including high-density character strings 114 and graphic information (115) can be printed with high image quality and a quiet printing operation can be performed. Also, the receipt (110) and the printed slip 120 can be obtained at the same location (25R, 25S), so that the handling is simple.

Further, both slip transport rollers 62D and 6D
5D, 62U and 65U are both paper transport rollers 52D.
Since it is arranged between 55D, 52U and 55U, the distance between both slip transport rollers 62D and 65D, 62U and 65U can be reduced. In addition, printing on the slip 120 is performed when the slip 120 includes both slip transport rollers 62D and 65D,
Since this is executed when the contact is made with (engaged with) 62U / 65U, the non-printable area (margin) on the slip 120 can be reduced. In addition, since the printer 20 can be constructed as a single unit, it is effective in reducing the size of the entire cash register.

Further, the upstream paper transport roller 52U
55U and the downstream-side paper transport rollers 52D and 55D are configured to apply a tension in the paper transport direction Xr to the receipt paper 110 and to apply the tension to the non-printing surface 111 of the receipt paper 110.
Can be conveyed from the upstream side to the downstream side while making contact with the print guide surface 29 disposed opposite to the ink jet print head 40.
The distance (Chs + slip thickness + Csr) between the paper and the printing surface of the receipt paper 110 can be kept constant, and the receipt paper 1
Since there is no slack in 10, the printing quality can be further improved.

[0077]

According to the first aspect of the present invention, the ink-jet printing mounted on the printing position in the middle of the paper transport direction, wherein the receipt paper can be transported along the paper transport direction by the upstream transport roller and the downstream transport roller. It is possible to print the receipt print information using the head, and since the distance from the printing position to the downstream transport roller is selected to be longer than the length of the logo printed on the receipt paper in the paper transport direction, the receipt is an inkjet printer for cash register. In addition to being able to print high-quality, high-speed, low-noise receipt printing information on paper, the ink drying time can be skillfully and sufficiently secured, so that a beautiful receipt free of ink stains printed with various logos can be issued.

According to the second aspect of the present invention, the logo printed on the receipt for the current customer is the same as the receipt paper for the current customer after the printing of the receipt print information of the previous customer and before the commencement of product registration for the current customer. Since it is formed so as to be printable, the same effect as in the case of the first aspect of the invention can be obtained, and further, receipt print information (character information) other than the printed logo is printed on the customer receipt this time. Since the receipt can be issued only by itself, the waiting time for the customer to receive the receipt can be greatly reduced. In addition, the receipt printing information (excluding logo) of the second customer can be printed immediately (sequential printing method) as the transaction procedure progresses,
The buffer can be omitted as compared with the case where all the receipt print information is stored in the buffer and all the receipt print information is printed all at once, and the speeding up of printing can be promoted also from this point.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view for explaining a sheet transport device and a slip transport device.

FIG. 3 is a plan view for explaining a print mode of receipt print information on a receipt sheet.

FIG. 4 is a side view for explaining a sheet transport device and a slip transport device.

FIG. 5 is a side view for explaining a relationship between a printing position and a distance between a downstream paper transport roller and a logo.

FIG. 6 is a block diagram for explaining a drive control unit and a registration control unit.

FIG. 7 is a flowchart (1) for explaining the operation of the printer.

FIG. 8 is a flowchart (2) for explaining the operation of the printer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Electronic cash register 20 Cash register inkjet printer 21 Printer main body 27 Roll paper accommodation part 30 Carrier moving mechanism 32 Carrier 40 Inkjet print head (print head) 45 Ink cassette 50 Paper transport device 52U, 55U Paper transport roller (upstream transport roller) ) 52D, 55D Paper transport roller (downstream transport roller) 60 Chit transport device 62, 65 Chit transport roller 110R Roll paper 110 Receipt paper 112W Receipt paper width 115 Logo mark (logo) 115W Logo mark width 120 Chit Xr Paper transport Direction Xs1 Forward transport direction Xs2 Reverse transport direction

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Hiroaki Katahira, Inventor Hiroto Katahira 570, Ohi-machi, Oni-cho, Tataoka-gun Shizuoka Tec Co., Ltd. Kazumi Kotani (72) Inventor Kazumi Kotani 570, Ohi-cho, Oni-cho, Taga-gun, Shizuoka Prefecture F-term (reference) 2C056 EA16 HA29 HA33 2C058 AB08 AB18 AC07 AD05 AE02 AE04 AE09 AF06 AF20 AF23 GA11 2C060 BA09 BB04 BB13 BC03 BC04 BC12 BC15 BC22 BC23 3E042 BA07 CE02 CE04

Claims (2)

[Claims] An ink dot is printed on a receipt paper below an ink jet print head mounted at a printing position in a middle of the paper conveyance direction, wherein the receipt paper can be conveyed in a paper conveyance direction by an upstream conveyance roller and a downstream conveyance roller. The receipt print information is formed so that it can be printed while jetting, and the distance from the print position to the downstream transport roller is included in the receipt print information and is selected to be longer than the length of the logo printed on the receipt paper in the paper transport direction. Inkjet printer for cash register. 2. The logo to be printed on the receipt for the customer this time is formed so that it can be printed on the receipt paper for the customer this time after the printing of the receipt print information of the customer before and before the registration of the product for the customer this time starts. The ink-jet printer for cash register according to claim 1, wherein