JPH02120050A - Dot line printer - Google Patents

Abstract

PURPOSE:To make a balance weight erazing vibration needless by performing printing simultaneously on both obverse and reverse surface of printing paper by a method wherein two hammer banks performing printing on the obverse and the reverse of the printing paper, and a driving mechanism with which two hammer banks are reciprocated parallel to each other by 180 deg. phase difference, are established. CONSTITUTION:A hammer bank 1, a platen 2, a hammer bank 3, and a platen 4 are so arranged as to be capable of printing on obverse and reverse surfaces of printing paper 5. Further, the hammer bank 1 and the hammer bank 3 are respectively connected to points of point symmetry to a rotary center of a crank arm 6 with links 7, 8. When the crank arm 6 is rotated within the shuttle motor 9, the hammer banks 1, 3 simultaneously perform printing on the obverse and the reverse of the printing paper 5 reciprocating laterally mutually by a 180 deg. phase difference. Therefore, saving of the printing paper and shortening of printing time can be performed. Further, by driving two hammer banks by a 180 deg. phase difference, the hammer banks can also serve as a balance weight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer device, and particularly to a dot line printer.

[Conventional technology]

Conventionally, this type of dot line printer has one hammer bank and a balancer that reciprocates in parallel with the hammer bank with a phase difference of 180 degrees to cancel out vibrations generated by the reciprocating movement of the hammer bank. had.

[Problem to be solved by the invention]

The conventional dot line printer described above has only one hammer bank, so it is not possible to print on the front and back sides of printing paper at the same time, and a counterweight is required to cancel the vibration caused by the reciprocating movement of the hammer bank. There was a drawback.

[Means to solve the problem]

The dot line printer of the present invention has two hammer banks that print on the front and back sides of printing paper, respectively, and a drive mechanism that reciprocates these two hammer banks in parallel with each other with a 180° phase difference. .

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a sectional view taken along line A--A in FIG. Hammer bank 1 and platen 2, as well as hammer bank 3 and platen 4, are arranged so as to be able to print on the front and back sides of printing paper 5, respectively. Also, hammer bank 1 and hammer bank 3
are connected by links 7 and 8 at points symmetrical to the center of rotation of the crank arm 6, respectively.

When the crank arm 6 is rotated by the shuttle motor 9, the hammer bank 1 and the hammer bank 3 are rotated by 180 degrees to each other.
While reciprocating in the left-right direction with a phase difference of , printing is simultaneously performed on the front and back sides of the printing paper 5, respectively.

〔Effect of the invention〕

As described above, the present invention has the advantage of being able to simultaneously print on the front and back sides of printing paper by printing with two hammer banks, saving printing paper and shortening printing time. Further, by driving the two hammer banks with a phase difference of 180°, there is an effect that they can also be used as a counterweight.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
It is a sectional view taken along the line AA in the figure. I... Hammer bank, 2... Platen, 3... Hammer bank, 4... Platen, 5... Print paper, 6... ... Crank arm, 7 ... Link, 8 ... Link, 10 ... Ink ribbon, 11 ... Ink ribbon. Agent Patent Attorney Susumu Uchihara Figure 2

Claims (1)

[Claims] A dot line printer that performs printing by reciprocating a hammer bank in which a large number of hammers are arranged horizontally with respect to printing paper in the horizontal direction, two hammer banks that print on the front and back sides of the paper; A dot line printer comprising: a drive mechanism that reciprocates two hammer banks in parallel with each other with a phase difference of 180°.