JPS58215367A - dot printer - Google Patents

Abstract

PURPOSE:To increase the issuing speed of receipts by a method in which both printing for two lines of a receipt and printing for one line of journal paper are made within one cycle of a rotator in a dot printer for ECR. CONSTITUTION:A printing head 1 on a head base 4 is reciprocally moved under the quidance of a guide shaft 5 along a receipt paper 2 and a journal paper 3 by the rocking movement of a rocking lever 8 by the rotation of a rotary disc 6 with a cam groove 6b. In case where the same items are printed on the receipt paper 2 and the journal paper 3 within one cycle, printing is made on the receipt paper in the distance of HS-HT and also printing is made on the journal paper in the distance of HT-HU on the basis of position signals by a micro switch 14. When printing is performed only on the receipt paper, printing is made in the distance HS-HT and even in the distance of HV-HW in the return process, and printing for two lines is made within one cycle. Thus, when printing is performed only on the receipt paper, the printing speed is doubled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dot printer, and more particularly to a dot printer that prints on ECR receipt paper and journal paper.

Dot printers take advantage of the ability to freely print characters and symbols, and can print a large amount of information on receipt paper (receipts) and journal paper (recording paper).
It has come to be used as a printer for CR (electronic cash register).

However, in order to improve the performance of ECR, ECR preprinters are required to have a function that can quickly issue receipt paper to customers.

To explain the importance of this with reference to the printing example of receipt paper in FIG. 1, as shown in the figure, the store name stamp is stamped with a porous stamp, but the rest are printed with a dot printer. However, the items printed on receipt paper and journal paper are not all the same, and items with blank marks are generally printed only on receipt paper.

This does not mean that there are many items to be printed on receipt paper, but the performance of ECH is determined by the printer that can print receipt paper quickly.

To increase the speed of BCR receipt issuance,
A dot printer has a mechanism in which the print head prints while reciprocating along the receipt paper and journal paper.A pulse motor is used to drive the print head, and the print head prints on the receipt paper by reciprocating only within the range of the receipt paper. There are other methods, but the disadvantage of pulse motors is that they are expensive, including the control circuit.

There is also a method (bi-direction method) that uses a rotating disc cam or a rotating cylindrical cam to reciprocate the print head and print in both left and right directions, but this method increases the speed of printing on both receipt paper and journal paper, but In particular, it does not have a mechanism that can only print receipt paper quickly, and position detectors for printing in both left and right directions are placed in two places, making the printer expensive due to adjustment work and other disadvantages.

The present invention eliminates such drawbacks, and its purpose is to increase the printing speed of receipt paper without using an expensive pulse motor or a bidirectional printing method, and to achieve a simple and inexpensive structure. The objective is to provide a high-performance CR dot printer. The present invention will be described in detail below based on Examples.

2 and 3 show a plan view and a side cross section of an embodiment of the present invention, FIG. 4 shows a time chart of the printer, and FIG. 5 shows a time chart of printing.

In FIG. 2, a print head 1 installed on a head stand 4 is placed on a guide shaft 5 while facing receipt paper 2 and journal paper 3.
It moves back and forth in the direction of the arrow using as a guide. Cam groove 6b
The rotating disc 6b has a gear part 6α on its outer periphery, and meshes with the motor gear 12, rotating around the camshaft 7 as shown by the arrow B.
Rotate in the direction.

The swing lever 8 has a guide rail (α) that engages with the cam groove 6b.
10, and a guide shaft +b that engages with the guiding groove 4a of the head stand.
111 is provided with a foot, which is pivotally supported by the fulcrum shaft 9,
When the guide shaft fα110 rotates, the guide shaft fα110 swings following the cam groove 6b, causing the head stand 4 to reciprocate. In addition, control (
As No. 5, a protrusion 6C is provided on the outer periphery of the rotating disk 6,
The microswitch 14 for the position detection signal is resistant to I. Further, as a detector for a timing signal for energization of the print head, a timing signal is generated by a combination of a slit $i15 having an f1 slit and a 7-oto sensor 16 which is directly connected to @l of the motor 1:3. Next, to explain in detail the reciprocating movement of the print head l and the j-th rotation of the print head 1 using the time chart of the printer shown in Fig. 4, the print head 1 rotates one rotation (360 degrees At 111J (cam rotation angle), there is a mark 41 stock (the process in which the 1fj-shaped head moves #IFIJ from receipt paper to journal tuna) and a return process (the head moves to journal paper or C] rental paper - "culm") .And, during the printing process,
There is an equidistant transfer section of ~to printing φ1 shouting 11 (it, -;~IT) and journal printing 4 circles (HT, HU),
In the return process, there is a symbol (7) 14i character H,,! ',
;tJ(HV-HW) t7) I made a song of ``Iζ1-Nikamu groove 6b'' that can be called % and get 1 out of 1.

When a print command signal is input to the dot printer fL, the motor is energized and starts rotating, and at the same time a timing signal is generated from the 7-point sensor 16. Further rotation causes the microswitch 14 to generate a position detection signal. This position detection signal is used as the printing start signal, and the place where it matches the rising edge of the timing signal is determined as the receipt printing printing start position TS.The positions of TT, TU, TV, and TV are determined by the number of timing signals. is determined in advance and used as the printing timing for each sheet of paper.

The paper feeding operation (mechanism and method are omitted) is performed as shown in FR1, F'J, and F'R2 after printing on each paper.

For more details, use the time chart printed in Figure 5.
Regarding printing on each type of paper, the term C is the same for receipt paper and journal paper.'' In this example, the print head is in the printing process circle, and the item C is the same for receipt paper and journal paper. This shows the normal printing timing of printing on HS and HT (bl) and on journal paper between HT and I(H. The D section is an example when printing only on receipt paper. Printing during HT is the same as usual, but printing is also performed during the XOi return process between HV and HW, making it possible to print two lines within one cycle.

FIG. 6 is a schematic view showing another embodiment of the present invention, in which the rotation of the cylindrical grooved cam 17 causes the print head 18 to reciprocate in the direction of the arrow. As in the previous embodiment, the cylindrical groove cam has an equidistant movement section for printing on receipt paper and journal paper in the printing process, and an equidistant movement area for printing on receipt paper in the return process. The groove shape is such that two lines of receipt paper and one line of journal paper can be printed in one cycle in which the cylindrical grooved cam 17 rotates and the print head 18 reciprocates once. It is.

As explained above, the present invention provides a dot printer for cash registers that has a print head that reciprocates by a rotating cam member and prints on receipt paper or journal paper, in which two lines are printed within one cycle of the rotating cam member. Since it is a dot printer configured to print on receipt paper and one line of journal paper, the printing speed when printing only on receipt paper is twice that of normal printing. It is possible to provide a dot printer with a simple structure and at low cost.

The present invention can also be applied to a printer that combines slip paper (card paper) and journal paper.

[Brief explanation of the drawing]

Figure 1 is an example of printing on receipt paper. FIGS. 2 and 3 are a plan view and a side sectional view of an embodiment of the present invention. FIG. 4 is a time chart diagram of the printer. Figure 5 is a printing time chart. FIG. 6 shows a schematic diagram of another embodiment of the invention. 1 is the print head 2 is the receipt paper 3 is journal paper 4 is head stand 6 is the rotating disk 17 is the cylindrical groove cam and above Applicant: Shinshu Seiki Co., Ltd. Over 10 patent attorneys

Claims (1)

[Scope of Claims] A dot printer for a cash register that has a print head that reciprocates in the direction of the printing digit by a rotating cam member and prints on receipt paper or journal paper, in which two lines are printed within one cycle of the rotating cam member. A dot printer characterized in that it is configured to print one line of receipt paper and one line of journal paper. (The dot printer according to claim 1, characterized in that a rotary disk provided with a grooved cam is used as the 21-rotation cam part.) The dot printer is characterized in that a cylindrical grooved cam is used as the 131-rotation cam part. A dot printer according to claim 1.