JPH0636939Y2 - Serial printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a serial printer applied to a check writer or the like.

(Prior Art) A serial printer configured to print an amount of money, etc., in each digit by a single type wheel, prints the amount of money in multiple digits at the same time by arranging a plurality of type wheels in parallel corresponding to each digit. Compared with the parallel type printer, the size can be greatly reduced and the cost can be reduced.

As this serial printer, for example, one in which ink is applied to the characters on the peripheral surface of the character wheel when the character wheel is rotated in the character selection step and the reset step is known.

(Problems to be Solved by the Invention) In the serial printer, as shown in FIG. 5, depending on the positional relationship between the type wheel A, the ink roll B, and the printing plate C and the rotation direction of the type wheel A, before ink is applied, A type group that reaches the printing position (position facing the printing plate) is generated.

That is, when a character in this character group is selected, it reaches the printing position before the ink is applied to the ink roll B and printing is performed, and the printing is performed after a long time without printing. In that case, there is a problem in that when this type is first selected, unclear printing results.

In order to avoid such a problem, it is conceivable to provide a blank a at a position corresponding to the type group without arranging the type, but in this case, the interval between other type characters must be narrowed accordingly. If the diameter of the type wheel is set large instead of narrowing the interval between the type characters, it has been an obstacle to downsizing the serial printer.

Further, there is also known a serial printer in which an ink application step is provided before the type selection step, but there is a problem that it takes a long time to start the printing operation by the idle rotation.

Therefore, the present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is to effectively use the outer circumference of the type wheel even if the ink application process by idle rotation of the type wheel is eliminated. Therefore, it is an object of the present invention to provide a serial printer capable of always performing clear printing by always performing printing after applying ink from the first printing.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a type wheel in which characters are arranged at a predetermined pitch in the circumferential direction, and an ink coating method that applies ink to the characters in contact with the type wheel. Means, a stamper arranged so as to face the type wheel, a type wheel drive mechanism for driving the type wheel to perform a type selection operation, a printing operation, and a reset operation for returning to the initial position after the printing operation. In the serial printer provided, when the type wheel is at the initial position, first on the type wheel surface located upstream of the ink applying means and downstream of the printing plate with respect to the rotation direction of the type wheel. It is characterized in that it is configured by setting the type array so that the type that cannot be printed is positioned.

(Operation) In the present invention having the above configuration, the type wheel selected by the type wheel drive mechanism is selected by the type wheel drive mechanism to select the type and the first printing operation is performed by the ink applying means in the rotational direction of the type wheel. Since it is a typeface located on the downstream side and moves to the printing position (position facing the printing plate) after ink is applied,
It is possible to clearly print on the paper sent between the selected type and the printing plate. In the second and subsequent printing operations,
The printing characters arranged between the printing wheel surface facing the ink applying means and the printing wheel surface facing the printing plate are set by the ink applying means when returned to the initial position by the printing wheel driving mechanism after the first printing operation. Since the ink is applied, it is possible to print without any trouble even if selected later.

(Example) Below, this invention is demonstrated based on the Example shown in figure.

FIG. 1 shows an embodiment in which the serial printer of the present invention is applied to a check writer. In the figure, reference numeral 1 is a main body frame, which is an input section 2 including function keys such as numerical keys, issue keys, and memory keys, a display section 3 for displaying input numerical values, and a sheet P for checks and receipts. A space 4 for insertion and a printing unit 5 for printing input numerical values on the paper P are provided. The printing unit 5 is composed of a printing mechanism having a single type wheel and a paper feeding mechanism. Every time the digit is printed, the printing paper P is fed in the digit direction to print the amount of money for one line.

After the print data such as the amount of money is input from the input unit 2 with the paper P inserted in the gap 4, the display unit 3 confirms the print data and then the issuing key is pressed. Printing is performed every time. It should be noted that the paper P is fed in the digit direction indicated by the arrow for each digit printing.

FIG. 2 shows the internal structure of the printing unit 5 in detail.
In the figure, 6 is a horizontal substrate, 7 is a fixed frame which stands upright with respect to the horizontal substrate 6, and 8 is a swing frame. One end of the swing frame 8 is swingably supported by one end of the fixed frame 7 via a support shaft 9.

The oscillating frame 8 has a motor that constitutes a type wheel drive mechanism from its base end (one end) toward its free end (other end).
10, a gear transmission means 11, a type wheel 12 driven by the type wheel drive mechanism, and an ink roller 14 as an ink application means for contacting the type wheel 12 and applying ink. At a position directly below the type wheel 12, a print stand 15 is arranged so as to face the type of the type wheel 12 and is exposed from the window hole 13 of the horizontal substrate 6.

As shown in FIG. 3, the characters 12a are arranged on the peripheral surface of the type wheel 12 at a predetermined pitch in the circumferential direction, and the arrangement order is as follows. That is, when the type wheel 12 is reset by the type wheel drive mechanism and returned to the initial position, it is between the type wheel surface facing the ink roller 14 and the type wheel surface facing the stamp 15 (the rotation direction of the type wheel 12). On the other hand, on the upstream side of the ink roller 14 and on the downstream side of the printing plate 15, the printable characters 12a 'that cannot be printed first are arranged, and at other places, other printable characters except these print characters are arranged. It is configured to be. When printing sequentially from the upper digit (monetary unit mark “¥”), the characters that cannot be printed first are tamper-proof end marks “*”, commas “,” and numbers “0”. 12a ', and other characters such as numbers "1-9" and currency unit mark "¥"
There is 12a. When printing from the lower digit "tampering prevention end mark" * "), there are type characters 12a 'such as the currency unit mark" \ ", comma", ", etc. that cannot be printed first. There are tampering prevention end marks "*", numbers "1 to 9", and other types of characters 12a.

The type wheel drive mechanism is configured as follows. That is, as shown in FIG.
The gear 19 at the final stage is made up of 6,17,18,19, and is equipped with a support shaft 20 coaxially with the type wheel 12. The type wheel 12 is integrally provided with a ratchet wheel 21, and the engaging recess 21a formed on the inner peripheral surface of the ratchet wheel 21 has an engaging projection of an elastic engaging body 22 provided integrally with the gear 19. 22a is inserted.

Further, teeth 21b are formed on the outer periphery of the ratchet wheel 21 in correspondence with each type of character, and one of the teeth 21b is projected outward in the radial direction to determine the initial position of the type wheel 12. To form a reference tooth 21c. As shown in FIG. 4, the ratchet wheel 21 has a locking lever 23
Is designed to be engaged and disengaged. The locking lever 23 is locked to the teeth 21b of the ratchet wheel 21 when the suction operation is performed by the solenoid 24 (see broken line in FIG. 4), and is disengaged from the ratchet wheel 21 when the suction operation is not performed by the solenoid 24 (see FIG. 4). See the solid line).
On the other hand, the reference tooth 21c of the ratchet wheel 21 is the solenoid 2
Even when 4 is turned off and the suction operation is not performed, the height is formed so that it can be locked by the locking lever 23, and the reference tooth 21c is used in the reset operation for returning the type wheel 12 to the initial position.
The type wheel 12 is stopped at the position where the locking lever 23 is engaged with the initial position. Therefore, when the type selection process is performed from the initial position, the protrusion 18b at the inner peripheral predetermined position of the annular recess 18a formed on the side surface of the gear 18 that rotates at a rotation ratio of 1/3 with respect to the gear 19 is engaged. By abutting against the end 23a of the stop lever 23, the locking lever 23 is pushed up against the holding member 23 ', and the locking lever 2 is pushed from the reference tooth 21c of the ratchet wheel 21.
3 is disengaged, whereby the type wheel 12 is selectively rotated. Therefore, when the locking lever 23 is disengaged from the ratchet wheel 21, the rotation is transmitted from the motor 10 to the gears 16, 17, 18 and 19 of the gear transmission means 11, and the locking convex portion 22a.
The rotation is transmitted from the gear 19 to the type wheel 12 through the locking (fitting) of the locking recess 21a. When the locking lever 23 is locked to the ratchet wheel 21, the type wheel 12 remains stopped, and the locking projection 22a is locked by the rotation of the gear 19 and the locking recess 21a.
The gear 19 slips and rotates with respect to the type wheel 12.

The support shaft 25 supporting the gear 18 has a cam member 26 coaxially with the gear 18.
(See FIG. 2) is fixed. This cam member 26 is
Although not shown in detail, one rotation consists of three parts, a character selection process part, a printing process part, and a reset process part, and one rotation is performed for printing one digit. In the printing process portion, the swing frame 8 is swung by the cooperation of the cam floor 27 provided on the fixed frame 7.

As shown in FIG. 4, a detection disk 28 that rotates integrally with the type wheel 12 is fixed to one end of a support shaft 20 that supports the type wheel 12 and the ratchet wheel 21. Slits 28a are formed on the detection disk 28 in correspondence with the characters arranged on the character wheel 12, and light passing through the slits 28a is detected by a photo sensor 29.

The output of the photo sensor 29 (position signal for detecting the position of the print character) is input to the control unit 30 (see FIG. 4). Control unit
In addition to the photo sensor 29, 30 receives a signal from the input section 2 to display the display section 3, the motor 10 of the type wheel drive mechanism, and the solenoid 24.
The drive signal is output to.

Further, 35 is a holder for holding the ink roller 14, and a handle 35a is provided at one end thereof. 36 is the holder 35
This is a spring plate that biases the ink roller 14 toward the type wheel 12 side via.

Next, the operation of the above embodiment will be described.

When print data such as the amount to be printed is input from the input unit 2, the control unit 30 operates the display unit 3 to display the input print data, while the motor 10 and the solenoid 24 operate based on the print data. That is, the motor 10 operates to start the type selection process first. In this type selection process, the type wheel 12 is rotated integrally with the gear 19, a signal is output from the photosensor 29 to the control unit 30 as the type wheel 12 rotates, and the type 12a contacts the ink roller 14. Then, when the type wheel 12 has rotated to a position where a predetermined type character, for example, the character type 12a of the “¥” mark, faces the stamp 15, the solenoid 24 operates and the locking lever 23 is sucked. As a result, the locking lever 23 locks the ratchet wheel 21 and stops the type wheel 12. Next, in the printing step, at this time, the locking convex portion 22a is disengaged from the locking concave portion 21a, and the gear
19 slip-rotates with respect to the type wheel 12. The oscillating frame 8 is produced by the synergistic action of the cam member 26 and the cam floor 27.
Is rotated to the horizontal substrate 6 side to perform the printing operation, and the paper P
The "\" mark is printed on. When this printing operation is completed, the locking lever 23 is disengaged from the ratchet wheel 21 by the solenoid OFF signal. After that, in the reset process,
The type wheel 12 is rotated to the initial position, and at the same time, the engaging projection 22a is fitted into the engaging recess 21a, and the correspondence between the type wheel 12 and the gear 19 is also returned to the initial state. When the type wheel 12 returns to the initial position, since the type 12a 'that cannot be printed first is in contact with the ink roller 14 and the ink is applied, the type 12a' is selected and printed in the next type selection process. It is possible to print without any trouble even when moving to the process. The number following the currency unit mark “¥” is also printed on the paper P by repeating the same operation.

As described above, in this embodiment, the type 12a ′ that cannot be printed first at the initial position is arranged on the upstream side of the ink roll 14 and on the downstream side of the printing plate 15 with respect to the rotation direction of the type wheel. Since the print character array is configured, clear printing can always be performed from the first printing without the need for an ink application step by idle rotation before the printing step.

The type wheel drive mechanism is not limited to that shown in the present embodiment, and in short, performs a type selection operation, a printing operation, and a reset operation for returning the type wheel to the initial position after the printing operation. All you need to do is to be able to do so.

(Effects of the Invention) The present invention has the above-described configuration and operation. When the type wheel is in the initial position, the type that cannot be printed first is the upstream side of the ink applying means with respect to the rotation direction of the type wheel. By setting the type array so that it is located on the surface of the type wheel located on the downstream side of the printing plate, it is possible to use the outer circumference of the type wheel effectively and always perform clear printing without the ink application process by idle rotation. The effect of being able to do is obtained.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment in which one embodiment of a serial printer according to the present invention is applied to a check writer,
The figure is a partially omitted side cross-sectional view of the printing section of the same embodiment, FIG. 3 is a schematic side view showing the arrangement of the characters of the type wheel of the same embodiment, and FIG. 4 is a side view of the same embodiment. [Fig. 3] is a schematic side view showing a conventional technique. Explanation of code 5 …… Printing part, 12 …… Type ring 12a ′ …… Type that cannot be printed first 14 …… Ink application means (ink roller) 15 …… Stand, 10 …… Motor 11 …… Gear transmission means , 16 ~ 19 ... Gear 21 ... Ratchet wheel 22 ... Elastic locking body, 23 ... Locking lever 24 ... Solenoid, 26 ... Cam member 27 ... Cam floor, 28 ... Detection disk 29 ... Photo sensor , 30 …… Control unit

Claims (1)

[Scope of utility model registration request] 1. A type wheel in which a plurality of characters are arranged in a circumferential direction at a predetermined pitch, an ink applying means for applying ink to the type character in contact with the type wheel, and arranged so as to face the type wheel. A print stand and a type selection operation by driving the type wheel,
In a serial printer including a printing operation and a type wheel drive mechanism for performing a reset operation for returning to the initial position after the printing operation, when the type wheel is at the initial position, the ink applying means is arranged in the rotational direction of the type wheel. The serial printer is characterized in that the type array is set so that the type that cannot be printed first is positioned on the type wheel surface located on the upstream side of the printing plate and on the downstream side of the stamp.