JPS6258908B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ECR printer that prints on receipt paper and journal paper that are juxtaposed.

Conventionally, ECR printers that print on receipt paper and journal paper placed side by side use the same type of journal printing type wheel as the receipt printing type wheel, even though the printed characters on the receipt paper and journal paper are often the same. The same characters were printed on journal paper and receipt paper, respectively.

The present invention takes into full consideration the characteristic of ECR printers that the characters printed on the receipt and journal are often the same, and enables journal printing by moving the type wheel for printing receipts. The purpose of this project is to enable the selection trigger electromagnet and type wheel of the journal printing device to be used in common with the receipt printing device, thereby significantly reducing the number of parts and providing an inexpensive ECR printer.

The present invention will be explained below using examples.

FIG. 1 is a front view showing an embodiment of the present invention.
1, 2, 6, and 7 represent printing means, 1 is a journal printing roller that prints on the recording paper 3 for journal printing, and a journal printing roller driving member 2.
driven by. Reference numeral 4 represents an ink roller that transfers ink to the typeface, and 5 represents an ink roller support member. Reference numeral 6 denotes a receipt printing roller that prints on the recording paper 8 for printing receipts, and is driven by a receipt printing roller drive member 7. Reference numeral 9 denotes a type wheel on which printed characters such as letters and symbols are arranged around the outer periphery, and the number of digits necessary for journal printing is arranged. 10 is type wheel 9
11 is a type wheel drive shaft that supports the type wheel shaft 10 and has a key groove in a part of the shaft. The key groove of the type wheel drive shaft 11 and the protrusion of the type wheel shaft 10 that engages with the key groove play the role of transmitting rotation in the circumferential direction and as a guide for sliding the type wheel shaft in the thrust direction. 12 is a slide lever for sliding the type wheel shaft 10;
3 to 16 are selection means necessary for waiting the desired type at the printing position; 13 is an electromagnetic coil;
4 is a selection lever, 15 is a selection lever return spring, 1
6 is a selection lever shaft. 17 to 22 are moving means for moving the selection lever 12 in the thrust direction of the type wheel shaft 10 (this is the same as the reciprocating mechanism of the printing head using a rotating disk of the printing head in Japanese Patent Laid-Open No. 53-63114, so a brief explanation will be provided). It is.

The driving force transmitted from the motor (not shown) is transmitted from the drive gear 17 to the transmission gear 18 by a gear, and the transmission gear 18 is provided with a grooved cam and is a part of the drive lever 21 that drives the slide lever 12. to engage the groove cam. The drive lever 21 operates using the drive lever shaft 20 as a fulcrum, engages with the slide lever shaft 22, and moves the slide lever 12. 23 and 24 are frames. Now that the configuration has been described above, the operation of one print cycle will be explained with reference to the timing chart shown in FIG. One printing cycle can be roughly divided into a type selection process, a receipt printing process, a journal printing process, and a reset process. In the type selection process, the type wheel 9 and the like are on standby on the journal side as shown in the figure, and when a print command is issued from the printer control section (not shown), the type wheel drive shaft 11 starts rotating. Accordingly, the selection means 13 to 16 operate so that the desired characters in each digit are aligned with the printing position, and the operation is completed when the type wheel drive shaft 11 stops. The above is the type selection process, and next, the receipt printing process will be explained. The printing process includes the steps of inking and printing the type, and the type to be printed aligned at the journal printing position (first printing position) is transferred directly to the receipt in the direction of arrow A by the moving means 17 to 22. Print position (second print position)
will be moved up to At this time, ink is transferred by the ink roller 4. At this time, the type wheel shaft 10, the slide lever 12, and the selection means 13 to 16 move together with the type wheel 9. When the movement is completed, the receipt printing roller 6 is rotated by the receipt printing roller drive member 7, and the printed characters are pressed through the receipt printing recording paper 8. Then, the ink transferred by the ink roller 4 is further transferred to the recording paper 8 for receipt printing. The above is the receipt printing process. Next is the journal printing process, in which the moving direction is in the direction of arrow B, and the remaining operations are the same as the receipt printing process. In the final reset process, when the type wheel drive shaft 11 rotates again, the type wheel 9 is stopped at the original standby position by the selection means 13 to 16, and the type wheel drive shaft 11 etc. are stopped by a stop signal from the printer control section. The printer stops, and the reset process and one printing cycle are completed.

As described above, according to the present invention, by taking advantage of the feature that printing on receipt paper and journal paper in an ECR printer is the same, and using selected type for both journal side printing and receipt side printing, In comparison, type wheel 9 is halved. As a result, the number of type wheel selection methods is halved, resulting in significant cost reductions and the ability to provide ECR printers at lower prices. Also, type wheel 9 and selection means 1
The fact that 3 to 16 is half the size of conventional printers has the effect of increasing the reliability of selected parts of the printer, reducing the burden of testing during the design stage, and improving ease of assembly. There is. In addition, conventionally, the receipt electromagnetic coil and the journal electromagnetic coil are energized at the same time, resulting in high power consumption, but according to the present invention, the electromagnetic coil is halved, so power consumption is halved, so power consumption is significantly reduced. It becomes less.

FIG. 3 is a diagram showing a second embodiment of the moving means, where 25 is a first plunger for moving from the journal to the receipt, 26 is a second plunger for moving from the receipt to the journal, and 27 is the first plunger 25. and second plunger 26
It is a common movable iron core, and a pin 29 is fixed to a part. Reference numeral 28 is a drive lever that engages with a fixed pin 29 and moves the fulcrum shaft 30 to the center of rotation. The moving method is as follows: When you want to move, you energize the first plunger 25, and the movable iron core 2 moves in the direction of arrow c.
7 moves to the receipt position of the drive lever 28, that is, the drive lever 28-1 is engaged as indicated by the dotted line.
Move up to. At this time, the current is turned off and a holding current is allowed to flow.Then, to move in the opposite direction, the holding current of the first plunger is first cut off, and then the holding current is turned on to the second plunger, and the subsequent steps are carried out in the same manner as described above.

In addition to the methods shown in the first and second embodiments, there are various possible moving means according to the present invention, and there are also various printing means and selection means.

As described above, the present invention provides low cost, high reliability,
This is an ECR printer that achieves low power consumption.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, in which 1 is a journal printing roller, 4 is an ink roller, 6 is a receipt printing roller, 9 is a type wheel, 10 is a type wheel shaft, 11 is a type wheel drive shaft, 12 1 is a slide lever, 13 to 16 are selection means, and 17 to 22 are moving means for moving the type wheel in the thrust direction. FIG. 2 is a timing chart showing an embodiment of the present invention. FIG. 3 shows a moving means according to another embodiment of the present invention.

Claims (1)

[Claims] 1. A type wheel having a plurality of characters, symbols, etc. on its outer periphery, a type wheel shaft to which a plurality of the type wheels are mounted, a selection means for selecting desired characters and symbols and aligning and stopping them at a first printing position; moving means for moving the type wheel selected by the selection means from a first printing position to a second printing position in the thrust direction of the type wheel shaft; 1. A printer comprising a printing means for printing at a printing position.