JPH10100492A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent lateral shift of a slip without sacrifice of the inserting/ setting performance thereof with respect to a slip receiver. SOLUTION: A frictional member 21 having high frictional resistance is provided at a position where the rear surface of a slit being inserted and set on a slip receiver 17 touches the surface 2a of the frictional member 21 in order to prevent lateral shift of the slip even when a print head is moved at the time of printing. Consequently, rib for preventing lateral shift can be eliminated from the slip receiver 17 side without sacrifice of the inserting/setting performance of the slip with respect to the slip receiver 17. The frictional member 21 for regulating the movement of such a slip is disposed at a position deviated from the roll paper carrying path on the side for feeding the roll paper to a platen. Since the roll paper being carried on the surface of the platen is not carried on the surface 21a of the frictional member 21 at the time of printing, carrying performance of the roll paper is not damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer having a slip printing function as well as a receipt / journal printing function.

[0002]

2. Description of the Related Art Conventionally, as a printer for printing a slip,
There are printers that also serve as receipt / journal printers used in POS terminals of ECR (electronic cash register) and POS (point of sale information) systems. In this case, as the print head, generally, a serial print head of a wire dot type for copying and printing slips and performing printing while moving in the row direction is used. Unlike the case of printing on receipt paper or journal paper using roll paper, the slip printing requires a special slip holding mechanism in order to use cut slip (single cut) slip paper as the target paper to be printed. .

An example of a receipt / journal printer provided with a slip holding mechanism and a slip printing function will be described with reference to FIG. The printer 1 includes a printing unit 4 including a platen 2 having a long platen surface 2a formed in a row direction (a direction perpendicular to the paper surface) and having a vertical surface, and a print head 3 opposed to the platen surface 2a. . The print head 3 has a wire dot structure, and is a serial print head that prints while moving in the row direction along the platen surface 2a. The printer 1
Is formed with a holding portion 7 for holding a roll body 6 of roll paper 5 which is a receipt paper or a journal paper. A transport guide 8 for guiding the roll paper 5 pulled out from the roll body 6 of the holding unit 7 toward the platen surface 2a of the printing unit 4 is formed in an appropriate shape.
On the upper side, a pair of rollers including a driving roller 9 for conveying the roll paper 5 on the platen surface 2a and a driven roller 10 is provided. Thus, the roll paper 5 is subjected to a printing operation by the print head 3 while being conveyed on the platen surface 2a by the driving roller 9 and the driven roller 10, so that the receipt content or the journal content is printed.

At this time, the width of the supply guide port 11 at the position just before the platen surface 2a in the transport guide 8 is regulated so that one sheet of paper can pass through the supply guide port 11 so that A paper guide 12 for securely guiding the roll paper 5 fed from the printer to the platen surface 2a without floating is attached to a part of the printer base 13. The paper guide 12 is, for example, a sheet, and the roll paper 5 is moved from the transport guide 8 side to the platen surface 2a.
In order to improve the operability when the paper guide 12 is pulled out and set to the side, the upper side of the paper guide 12 is swingable about the fulcrum 14 at the lower side, and the paper guide 12 is conveyed by a weak spring 15 so as to fulfill the above-mentioned regulating action. It is urged to the guide 8 side.

Further, below the printing unit 4, a slip receiving base 17 for positioning and supporting the lower end of the slip paper 16 manually inserted from above through the printing unit 4 is attached to the printer base 13. By driving the printing unit 4 in a state where the slip paper 16 manually inserted through the printing unit 4 is positioned and supported by the slip receiving table 17, predetermined contents are printed at predetermined positions of the slip paper 16. In the example of the printer 1, for example, only one total amount is printed as one authentication line on the slip sheet 16 in a restaurant. Since the printing position on the slip sheet 16 is fixed, the slip tray 17 is provided with a rib as shown in FIG. 4 or the like so that the slip sheet 16 does not shift left and right as the print head 3 moves when printing on the slip sheet 16. 18 are formed in two places to narrow the slip insertion path, and to increase the amount of protrusion of the ribs 18 to forcibly bend a part of the slip paper 16 as shown in FIG.

[0006]

However, according to the conventional slip holding mechanism, the presence of the ribs 18 causes the slip sheet 16 to be closed.
Can be prevented, but since the ribs 18 protrude in the slip insertion path, the slip becomes a resistance when the slip paper 16 is inserted and set in the slip receiving table 17, and it is difficult to insert and set. In particular, the slip sheet 16 is not limited to one sheet, but may be a thick sheet spelled out with five or six sheets. Is extremely difficult to set, and may not be set.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a printer provided with a slip holding mechanism which can prevent slippage of slip sheets without impairing the ability to insert slip sheets on a slip tray. .

[0008]

According to the first aspect of the present invention,
A printing unit including a platen and a serial type print head that prints while moving in opposition to the platen; printing on roll paper conveyed on the platen; and a slip inserted and set in a slip receiving tray through the printing unit In a printer for selectively performing printing on paper by commonly using the printing unit, the slip sheet that is deviated from the roll paper transport path on the supply side of the roll paper to the platen and is inserted and set in the slip tray. A friction member having a high frictional resistance was provided at a position where the back surface was in contact with the surface.

Therefore, the back side of the slip sheet inserted and set into the slip receiving tray through the printing section is in contact with the surface of the friction member having a high frictional resistance, so that the slip sheet is moved by the friction member even when the print head moves during printing. Is regulated to prevent lateral displacement, and printing can be performed at a desired position. Therefore, there is no need to form a rib or the like on the slip receiving side to prevent lateral displacement, and a simple planar shape may be used.
The insertion setting of the slip sheet into the slip tray is not impaired. Since the surface of the friction member having a high frictional resistance that regulates the movement of the slip sheet is disposed at a position off the roll paper transport path on the side of the roll paper supply to the platen, the surface of the friction member is positioned on the platen surface during printing. Is not conveyed through the surface of the friction member having a high frictional resistance, and the conveyance of the roll paper is not impaired.

According to a second aspect of the present invention, in the first aspect of the present invention, the platen surface projects to the print head side by a small amount from the surface of the friction member. Here, the “trace amount” means that the platen surface and the surface of the friction member are almost the same surface, but at least the extent that the surface of the friction member does not protrude toward the print head from the platen surface. . Therefore, since the surface side of the friction member does not form a step protruding from the platen surface, the slip sheet can be inserted and set smoothly as it is when the slip sheet is inserted and set on the slip receiving table along the platen surface. At the same time, since the surface of the friction member is substantially not flush with the platen surface and is almost flush with the platen surface, there is no inconvenience that the back side of the slip sheet does not contact and the side slip prevention function is not exhibited.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The same parts as those shown in FIGS. 3 to 5 are denoted by the same reference numerals, and description thereof will be omitted.
In the present embodiment, the surface of the paper guide 12 (the
A friction sheet 21 formed of a material having high frictional resistance and serving as a friction member is attached to the surface facing the surface 7. Therefore, the friction sheet 21 is on the supply side of the roll paper 5 with respect to the platen 2, deviates from the transport path of the roll paper 5, and the back surface of the slip paper 16 inserted and set in the slip receiving table 17 is in contact with the front surface 21 a. It is located at the location. As the friction sheet 21, for example, a rubber sheet obtained by increasing the frictional resistance by reducing the rubber hardness is used. The positional relationship between the surface 21a of the friction sheet 21 and the platen surface 2a is almost the same, but at least the platen surface 2a is set so as to protrude more toward the print head 3 than the surface 21a. Have been. For this reason, the friction sheet 21 is formed as thin as possible. Further, the rib 18 is omitted on the slip receiving table 17 side.

In such a configuration, the slip sheet 16 inserted and set in the slip receiving table 17 through the printing unit 4 is held with its back surface in contact with the front surface 21a of the friction sheet 21 having high frictional resistance. In this case, even if the print head 3 moves left and right, the slip sheet 16 is restricted in movement by the friction sheet 21 so that lateral slippage is prevented, and printing can be performed at a desired position. Therefore,
There is no need to form a rib 18 or the like on the slip receiving table 17 side to prevent lateral displacement, and a simple planar shape may be used. Therefore, the insert setting of the slip sheet 16 into the slip receiving table 17 is not impaired. The friction sheet 21 having a high frictional resistance is on the side of the roll paper 5 supplied to the platen 2 and
, The roll paper 5 conveyed on the platen surface 2a during printing is not conveyed through the front surface 21a of the friction sheet 21. The transportability of No. 5 is not impaired. That is, the provision of the friction sheet 21 does not impair the function as a receipt / journal printer. Further, since the surface 21a side of the friction sheet 21 does not form a step protruding from the platen surface 2a, the slip sheet 16 is inserted and set smoothly as it is when the slip sheet 16 is inserted and set on the slip receiving table 17 along the platen surface 2a. be able to. At the same time, the front surface 21a of the friction sheet 21 is not so much retracted from the print head 3 side as compared with the platen surface 2a and is almost flush with the platen surface 2a. There is no inconvenience that the side slip prevention function is not exhibited because the back surface does not contact the friction sheet 21.

In the present embodiment, a friction sheet 21 made of a thin rubber sheet is used as a friction member, and is adhered to the surface of the paper guide 12. May be attached to the surface of the paper guide 12 as a friction member. Further, in the present embodiment, the friction member is provided as the friction sheet 21, but the paper guide 12 itself may be used as the friction member so that at least the surface side of the paper guide 12 has a high frictional resistance. For example, even if a thin iron plate is used as the paper guide 12 and its surface is roughened to increase the frictional resistance of the surface, the surface of the paper guide 12 is coated with a resin (including spraying, painting, etc.) to reduce the frictional resistance of the surface. For example, a method of increasing the height may be used.

Further, the positional relationship between the platen surface 2a and the surface 21a of the friction sheet 21 is not necessarily limited to the positional relationship in the vertical direction as shown in the embodiment, and for example, the platen surface 2a is slightly inclined. In this case, the surface 21a may be set so as to take a position in which the surface 21a is slightly withdrawn in the direction of the inclined surface.

[0015]

According to the first aspect of the present invention, there is provided a printing unit including a platen and a serial type print head which prints while moving in opposition to the platen. In a printer for selectively performing printing and printing on a slip sheet inserted and set in a slip receiving tray through the printing section, the printing section is shared, a transport path of the roll paper on the roll paper supply side with respect to the platen A slip member having a high frictional resistance is provided at a position where the back side of the slip sheet to be inserted and set in the slip tray is in contact with the front surface, so that the slip sheet moves even when the print head moves during printing. Can be regulated, and the lateral displacement can be prevented,
Therefore, there is no need to form a rib or the like on the slip receiving side to prevent lateral slippage, without impairing the ability to insert slip sheets into the slip receiving stand, and to provide a friction member having a high frictional resistance to the platen. Since the roll paper is located off the roll paper transport path on the roll paper supply side, the roll paper transported on the platen surface during printing will not be transported through the surface of the friction member. In addition, the inconvenience of impairing the transportability of the roll paper can be avoided.

According to the second aspect of the present invention, in the first aspect of the present invention, since the platen surface protrudes by a small amount from the surface of the friction member toward the print head, the surface side of the friction member protrudes from the platen surface. Since the slip step is not formed, the slip sheet can be inserted and set smoothly when inserting and setting the slip sheet on the slip tray along the platen surface, and at the same time, the surface of the friction member is not much Since they are almost the same side without being retracted,
It is also possible to avoid such a disadvantage that the back side of the slip sheet does not come into contact with the slip sheet and the side slip prevention function is not exhibited.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a slip holding mechanism according to an embodiment of the present invention.

FIG. 2 is a schematic side view illustrating a configuration of a printer.

FIG. 3 is a schematic side view showing the configuration of a conventional printer.

FIG. 4 is a perspective view showing a slip receiving stand.

FIG. 5 is a plan view showing a slip holding mechanism.

[Explanation of symbols]

 2 Platen 2a Platen surface 3 Print head 4 Printing unit 5 Roll paper 16 Slip paper 17 Slip tray 21 Friction member 21a Surface

Claims (2)

[Claims] 1. A printing unit comprising a platen and a serial type print head for printing while moving in opposition to the platen, wherein printing is performed on roll paper conveyed on the platen and the slip is passed through the printing unit to a slip receiving table. In a printer for selectively performing printing on a slip sheet inserted and set by sharing the printing unit, the roll paper feed path with respect to the platen deviates from the transport path of the roll paper and is inserted into the slip tray. A friction member having a high frictional resistance is provided at a position where the back side of the slip sheet is in contact with the front side. 2. The printer according to claim 1, wherein the platen surface protrudes by a small amount from the surface of the friction member toward the print head.