JPH0570944U - Impact dot line printer - Google Patents

Abstract

(57) [Summary] [Object] The present invention has an object to obtain an impact dot line printer which does not require a counter balancer and can perform simultaneous printing of 2 to 4 lines. [Structure] Belt 1 suspended on a pair of rotating drums 2 and 3
Two hammer banks 4 and 5 each provided with a plurality of print belts along the print line are mounted at opposite positions of
Reciprocate both hammer banks in opposite directions.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an impact dot line printer capable of simultaneously printing 2 to 4 lines.

[0002]

[Prior Art]

 The conventional impact dot line printer prints by reciprocating (shuttle operation) a hammer bank equipped with multiple print heads along the print line. Generally, the first line is printed during the forward run. The next second line is printed when returning. In order to speed up this printing speed, it has been proposed to print two lines simultaneously. However, the conventional method is to print two lines simultaneously by arranging the print head pins in a staggered manner and electrically controlling the print head. I am trying to do it. However, this method has a design limit on the density of the print head pins, complicated control circuits and software for printing small characters, heavy hammer banks, and heavy counter balancers. Since it does not occur, the inertia becomes large, and there is a problem that the anti-vibration device needs to be devised.

[0003]

[Problems to be solved by the device]

 The present invention has a simpler configuration and software than the conventional method of printing two lines at the same time, and can print two lines at the same time without providing a counter balancer, and further prints three or four lines simultaneously. It is intended to provide a structure of an impact dot line printer that enables the above.

[0004]

[Means for Solving the Problems]

 Two hammer banks equipped with a plurality of print heads are installed along the print line at opposite positions of a belt suspended on a pair of rotating drums, and both hammer banks are reciprocally moved in opposite directions to each other. It is an impact dot line printer characterized by printing two to four lines at the same time by a print head provided in a hammer bank.

[Action]

 By simultaneously operating the print heads provided in each hammer bank, the print head of one hammer bank simultaneously prints the first line, and the other hammer bank simultaneously prints the second line, doubling the printing speed. If the print heads are arranged in a staggered manner and two lines are printed by one hammer bank, the conventional method can be used together to print three lines or four lines at the same time. Since one hammer bank serves as the counter balancer of the other hammer bank, there is an advantage that the counter balancer can be omitted.

[0005]

【Example】

 FIG. 1 is an enlarged side view of an embodiment of the present invention, and FIG. 2 is a front view of the embodiment of the present invention. 1 is a belt suspended on a pair of rotating drums 2 and 3, and 4 and 5 are opposed to the belt 1. The hammer banks 6-1, 6-2, 6-3, 6-4 mounted at the positions are repulsion springs for reducing the thrust required for deceleration at the end of each swing stroke of the hammer banks 4, 5. 7 is a platen, and hammer banks 4 and 5 are driven by a voice coil motor (VCM). In the embodiment, a plurality of print heads 4a and 5a are arranged in parallel in the hammer banks 4 and 5 along the print line, and the print pins 4b and 5b are provided in a row. With the above-described structure, the reciprocating motion of one hammer bank causes the other hammer bank to reciprocate in the opposite direction, thereby simultaneously printing the two lines by simultaneously operating the print heads 4a and 5a. If the print pins 4b and 5b are arranged in a zigzag pattern, two lines can be printed with one hammer bank as in the conventional case, which makes the software complicated, but it is also possible to print three or four lines. is there.

[0006]

[Effect of the device]

 According to the present invention, as described above, it is possible to simultaneously print two to four lines at the same time, so that the printing speed can be increased, and one hammer bank has a counter balancer function of the other hammer bank. Therefore, it is not necessary to provide a counter balancer as in the conventional case, and it is possible to provide a compact impact dot line printer for high-speed printing.

[Brief description of drawings]

FIG. 1 is an enlarged side view of an embodiment of the present invention.

FIG. 2 is a front view of an embodiment of the present invention.

[Explanation of symbols]

 1 Belt 2, 3 Rotating Drum 4, 5 Hammer Bank 6-1, 6-2, 6-3, 6-4 Repulsion Spring 7 Platen

Claims (1)

[Scope of utility model registration request] 2. Two hammer banks equipped with a plurality of print heads are mounted along a print line at opposite positions of a belt suspended on a pair of rotating drums, and both hammer banks reciprocate in opposite directions. The impact dot line printer is characterized in that 2 to 4 lines are simultaneously printed by a printing hammer provided in each hammer bank.