JPH038273B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a belt-type printing device, and more particularly to a printing device in which a second printing hammer is used to print characters in missing characters.

(b) Prior Art and Problems Printing devices are known as output devices for electronic computers, and if a printing device that can be made relatively small and has a relatively high printing speed can be obtained. Belt type printing devices are widely used because of their advantages. This belt-type printing device rotates a steel endless belt equipped with type, and a group of printing hammers is installed in a direction parallel to the belt.The group of printing hammers is selectively driven to strike the type, and the type is printed via an ink ribbon. Type is printed onto printing paper. Generally, the hammer group is manufactured by dividing it into several blocks. However, if one hammer in the hammer group malfunctions for some reason, the printing of that digit will be defective, and in order to repair this defect, it will be necessary to replace the hammer group block containing the defective digit. . Not only does this replacement require a lot of man-hours, but it also has the disadvantage that the printing device cannot be used after the failure occurs until it is restored.

(c) Purpose of the Invention In view of the above-mentioned drawbacks of the conventional art, an object of the present invention is to provide a printing device that can continue printing by using a second hammer in place of the hammer that caused the problem. It is something.

(d) Structure of the Invention As shown in the figure, the printing device according to the present invention is a belt-type printing device equipped with a type belt 1 and a group of printing hammers 3, in which a second printing hammer 4 movable in the printing digit direction is provided. (Hereinafter, moving printing hammer 4
) is arranged alongside the regular printing hammer group 3, and a printing type character AB corresponding to the movable printing hammer 4 is attached to the type belt 1 side, and 1 is attached to the printing hammer group 3. When the movable printing hammer 4, which operates with a line delay, is operated, it is configured to execute an extra printing cycle for one line on the printing paper 7.

(e) Examples of the invention Examples of the invention will be described in detail below with reference to the drawings.

The figure is a schematic diagram of an embodiment of the printing apparatus of the present invention, in which 1 is a type belt, 2 is a belt drive pulley, 3 is a group of printing hammers, 4 is a movable printing hammer, 5 is a moving mechanism, and 6 is an ink ribbon. , 7 is a printing paper, 8 is a platen, 9 is an operation panel, 10 is a digit display, 11 is a hammer movement switch, 12 is a buffer register, and 13 is a control section.

The type belt 1 is wide as shown in the figure, and type characters indicated by A, B, etc. are arranged in two stages, and each character stage faces a movable printing hammer 4 and a group of printing hammers 3, respectively. are doing. The type belt 1 is rotatably moved in front of a group of printing hammers 3 and a movable printing hammer 4 by a belt drive pulley 2. Therefore, when the printing hammer 4 or 3 is operated at the printing timing, the printing paper 7 and the platen 8 are struck through the ink ribbon 6, and the desired characters are printed on the printing paper 7. When operating the printing device under normal conditions, only the printing hammer group 3 is used, and when the printing hammer group 3 is in trouble, the movable printing hammer 4 is used. This distinction between uses is made by the hammer moving switch 11, which is turned off during normal use. For example, 13 movable printing hammers 4 are provided so that one hammer corresponds to one hammer block, and these 13 movable printing hammer groups 4 are integrally moved in the printing digit direction (in the figure) by a moving mechanism 5. X direction). The controller 13 regulates the amount of movement of the moving mechanism 5. This movement amount can be set using the operation panel 9.
Do it above. In other words, when moving the movable printing hammer 4 to the 124th digit, press the digit designation button 10-1.
124 should be displayed on the digit display 10 and the hammer moving switch 11 should be turned on. Through the above operations, 124 digits 124 are stored in the buffer register 12, and the control section 13 reads this value and operates the moving mechanism 5 to move 4-12 in the movable printing hammer 4 by 4 digits. The moving mechanism 5 can be easily constructed by using, for example, a stepping motor. young
If there is a problem with the hammer at the 124th digit, use the process described above to specify the 124th digit and move the movable hammer 4. The 124th character of the buffer register 12 is used as the print character. The printing timing will be described below. The movable printing hammer 4 is activated when the line on which the printing hammer group 3 is activated is line-feeded, that is, when there is a delay of one line. Therefore, when skipping the printing paper 7 or changing the page, 1
This requires an extra print cycle for each line, which is managed by the control unit 13. In addition, the buffer register 12 mentioned above
124 stored in is cleared by turning the hammer movement switch 11 to "off".

(f) Effects of the Invention As explained in detail above, the printing device of the present invention is capable of immediately replacing the printing hammer and continuing the printing operation even if there is a problem with the printing hammer.
This provides many advantages when operating the printing device.

[Brief explanation of the drawing]

The figure is a perspective view showing a printing apparatus of the present invention. In the figure, 1 is a type belt, 3 is a group of printing hammers, 4 is a movable printing hammer, 5 is a moving mechanism, and 7
indicate printing paper.

Claims (1)

[Claims] 1. In a belt-type printing device equipped with a type belt 1 and a group of printing hammers 3, a second printing hammer 4 that is movable in the direction of the printing column is arranged alongside the group of printing hammers 3. At the same time, when a type corresponding to the second printing hammer 4 is provided on the type belt 1 side, and the second printing hammer 4, which operates one line behind the printing hammer group 3, is operated, A printing apparatus characterized in that a printing cycle for one extra line is executed on the printing paper 7.