JPH0541020Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a type belt type printer used in calculators and the like, and particularly relates to an improvement of the mask member thereof.

[Conventional technology]

FIG. 3 is a plan view showing a typical type belt type printer. A pinion 4 is fitted to the output shaft 3 of a motor 2 supported by a frame 1. The rotation of the drive pulley 7 is transmitted through a pair of idle gears 5 and 6. Further, a selection lever 8 is rotatably disposed near the drive pulley 7, and when the claw portion 9 of the selection lever 8 fits into the drive pulley 7, the rotation of the drive pulley 7 is stopped. It is becoming more and more common. Further, an electromagnetic clutch 10 is disposed near the selection lever 8, and when the electromagnetic clutch 10 is turned on, the selection lever 8 rotates and the claw portion 9 fits into the drive pulley 7. It's becoming like that.

The drive pulley 7 faces one side of the frame 1, and the driven pulley 11 faces the other side of the frame 1. As shown in detail in FIG. 4, these drive pulley 7 and driven pulley 11 have a large number of printed characters 14,
A type belt 12 with 14... projecting at intervals.
is wound.

A platen 15 supported by the frame 1 is disposed in front of the type belt 12, and a desired type body 14 of the type belt 12 on the side of the platen 15 is placed inside the type belt 12.
A carriage 16 on which a hammer member 17 for pressing the hammer member 17 is mounted is movable in the lateral direction by a mechanism (not shown). Further, at the lower end of this carriage 16, when the desired type body 14 of the type belt 12 is pressed against the platen 15 by the hammer member 17, the type bodies 14 on both sides of the desired type body 14 are prevented from being printed. A pair of mask members 18, 1 for
8 is supported in a cantilevered manner so as to be positioned between the type belt 12 and the platen 15 with an interval of approximately one type body 14 left and right.

The carriage 16 is returned to its home position in a free state by a spring member 19. Further, paper S is supplied between the type belt 12 and the carriage 16 by a pinch roller 20 and a paper feed roller (not shown). Furthermore, the driven pulley 1
An ink roll 21 for applying ink to each type body 14 of the type belt 12 is disposed on the type belt 12 near the type belt 1 .

According to the above-described configuration, the rotation of the motor 2 is transmitted from the pinion 4 to the drive pulley 7 via the idle gears 5 and 6, causing the drive pulley 7 to rotate.
Correspondingly, the type belt 12 rotates together with the driven pulley 11. When the electromagnetic clutch 10 is turned on, the selection lever 8 rotates, and its pawl 9 engages with the drive pulley 7 to stop the rotation of the drive pulley 7 and stop the desired type 14 at a position facing the carriage 16. . Then, by driving the hammer member 17 in the carriage 16 and pressing the type 14 against the paper S facing in front of the platen 15, the ink applied to the type 14 is transferred to the paper S, completing the printing of the first digit. do. Next, the electromagnetic clutch 10
After the carriage 16 is carried up by turning off the
6 returns to home position. Then, the pinch roller 20 and the paper feed roller (not shown) feed the paper S.
is moved by one line and the next line is printed.

[Problems to be solved by the invention] By the way, when performing multicolor printing in the conventional printing having the above-described configuration, a plurality of ink rolls 21 are provided, and a specific color is selectively applied to the typeface 14 dedicated to each color. Even if an attempt is made to perform multi-color printing by applying ink, each mask member 18 comes into contact with the type 14 for any color, so when the type 14 comes into contact with the mask member 18, color mixing occurs from the mask member 18. When the ink is attached to the type body 14, color mixture of the inks occurs, and clear multicolor printing cannot be performed.

An object of the present invention is to overcome the problems of the conventional printers described above and to provide a printer that can perform clear multicolor printing.

[Means for solving problems]

The present invention consists of a platen that supports paper from the back, a type belt in which a plurality of type bodies are arranged to face the platen and protrude from the belt body at intervals, and a type belt that is attached to the back of the type belt. A printer comprising: a carriage equipped with a movably disposed hammer member for pressing a desired type body of a type belt against the platen; and a mask member supported by the carriage and positioned between the platen and the type belt. The mask member is arranged so that it can abut against the belt main body of the type belt without contacting the type bodies on both sides of the type body pressed against the paper on the platen so as to prevent the type bodies on both sides of the type body pressed against the paper from coming into contact with the paper. It is characterized by the fact that it is set up.

[Effect]

According to the present invention, the mask member does not contact the typeface but only the belt body, so the ink applied to the typeface does not adhere to the mask member, and therefore, the ink applied to the typeface does not adhere to the mask member. There is no risk of ink color mixing and clear multicolor printing can be performed.

〔Example〕

The present invention will be explained below with reference to embodiments shown in the drawings. Note that the same components as those of the conventional device described above are denoted by the same reference numerals in the drawings, and the explanation thereof will be omitted.

1A and 1B show a first embodiment of the multicolor printing printer of the present invention, which is arranged inside a type belt 12 and presses desired type bodies 14 of the type belt 12 against a platen 15. A horizontal supporting portion 22 projecting forward is provided at the bottom of the carriage 16 on which the hammer member 17 is mounted. mask member 18A,
18A are spaced from side to side and protrude upwardly to bend.

The mask members 18A, 18A are connected to the type body 14 that is pressed against the platen 15 by the hammer member 17.
Belt bodies 13a, 13a interposed between the printed characters 14a, 14a and the printed characters 14 located on both sides of
Belt body 1
The width is slightly shorter than the length of 3a and 13a.

According to the above-described structure, when the hammer member 17 is biased from the state shown in FIG. The printed characters 14a, 14a are also pulled forward by the printed characters 14, but as shown in FIG. The printed characters 14 pushed by the hammer member 17 to the members 18A, 18A and the belt bodies 13a, 13a between the printed characters 14a, 14a.
are in pressure contact with each other, so that the printed characters 14a, 14a on both sides of the printed material 14 do not move further toward the platen 15. Therefore, these mask members 18A,
18a prevents the printed characters 14a, 14a from moving forward, and only desired printed characters 14 come into pressure contact with the platen 15, and printing can be performed on the paper S on the platen 15.

By the way, both the mask members 18A, 18A are in contact with the printed characters 14 and the belt bodies 13a, 13a between the printed characters 14a, 14a, so that the printed characters 14a, 14
Since the ink of the typeface 14 is prevented from adhering to both the mask members 18A, 18A.

As a result, color mixing of the ink on the type body 14 via the mask members 18, 18, as in the conventional system described above, is prevented, so that multicolor printing can be performed clearly.

2A and 2B show a second embodiment of the present invention, in which the type bodies 14 protruding from the type belt 12 are spaced apart from each other in the longitudinal direction of the belt body 13. Not only that, but also it is located inside of both end edges 23, 23 of the belt body 13 in the width direction of the belt body 13. On the other hand, a pair of horizontal supporting parts 22, 22 projecting forward are provided on the upper and lower parts of the carriage 16, and a front end of each supporting part 22 is located between the type belt 12 and the platen 15. A pair of mask members 18B, 18B are provided so as to protrude and bend toward the belt main body 13 side with an interval left and right.

Then, the mask members 18B, 18B, . . .
It is arranged so as to be able to come into contact with the belt main body 13 on both end sides of the belt 14a.

Therefore, even in such a configuration, the advance of the printed characters 14a, 14a located on both sides of the desired printed characters 14 is prevented, and the desired printed characters are printed without adhering the ink of the printed characters 14a to each mask member 18B. Since only the font 14 can be pressed against the platen 15, multicolor printing can be performed clearly without fear of color mixing.

In addition, in this embodiment, since the protruding length of the printed characters 14a, 14a can be made shorter than in the first embodiment, it is possible to more stably prevent erroneous printing due to the printed characters 14a.

The present invention is not limited to the embodiments described above, but can be modified in various ways.

[Effect of idea]

As explained above, according to the present invention, the mask member can prevent the advance of print bodies other than those to be printed without directly contacting them, so ink does not adhere to the mask member. Therefore, there is an effect that clear multicolor printing can be performed.

[Brief explanation of drawings]

1A and 1B are plan views of main parts showing a first embodiment of a printer according to the present invention, FIG. 2A is a front view of main parts showing a second embodiment of the present invention, and FIG. 2B is a FIG. 2 is a sectional view taken along the line -A in FIG. 2, FIG. 3 is a plan view of a general printer, and FIG. 4 is an enlarged perspective view of the main part of FIG. DESCRIPTION OF SYMBOLS 1... Frame, 2... Motor, 7... Drive pulley, 8... Selection lever, 10... Electromagnetic clutch, 11... Driven pulley, 12... Type belt,
13, 13a... Belt body, 14, 14a...
Typeface, 15...platen, 16...carriage, 17...hammer member, 18, 18A, 18B
...Mask parts.

Claims (1)

[Utility Model Claims] 1. A printer having a platen that supports paper from its back, a type belt arranged to face the platen and having a number of type bodies protruding from the belt body at intervals, a carriage movably arranged on the back of the type belt and carrying a hammer member that presses desired type bodies on the type belt against the platen, and a mask member supported by the carriage and positioned between the platen and the type belt, characterized in that the mask member is arranged so that it can abut against the belt body of the type belt without abutting against the type bodies on either side of the type body pressed against the paper on the platen so that the type bodies on either side do not come into contact with the paper. 2. A printer as described in Utility Model Claim 1, in which the mask member is arranged so that it can abut against the belt body between the type body pressed against the paper on the platen and the type bodies on either side of the type body. 3. A printer as described in claim 1 of the utility model registration, wherein the type is located inside both end lines of the belt body in the width direction of the belt body, and the mask member is disposed so as to be able to abut against the belt body on both ends in the width direction of the type located on both sides.