JPH053386B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shuttle type line printer device configured to change the traveling speed of a hammer bank in accordance with the content of a print mode command from a control section.

Recent shuttle-type line printers reflect the need for higher speeds, and have been designed to print kanji mode lines (lines that include at least one kanji character in the same line), which require a long time to print one line, and kanji mode lines (lines that include at least one kanji character in the same line), and ones that require a long time to print one line. Differentiate between printable alphanumeric and kana mode lines (lines that do not contain kanji in the same line, hereinafter referred to as ANK mode lines), and change the running speed (oscillation speed) of the hammer bank to correspond to the printing mode. In particular, research is being actively conducted to improve printing speed.

It is well known that a shuttle type line printer device is a printer device that performs printing while swinging a printing section called a hammer bank.
Note that this shuttle type line printer device short-circuits the swing stroke of the hammer bank.
There are many systems in which multiple printing hammers (not shown) equally share the printing of a row, and in this case, the swing stroke of the hammer bank is approximately 25 mm to 50 mm.
It will be set to a certain degree.

[Conventional technology]

The structure of a conventional shuttle type line printer device will be explained below based on FIGS. 3 and 4.

FIG. 3 is a schematic side view of a main part showing the structure of a conventional shuttle type line printer, and FIG. 4 is a diagram showing the locus of motion of a hammer bank installed in this shuttle type line printer.

As shown in FIG. 3, the printing system of the conventional shuttle type line printer device includes a hammer bank 3 that performs printing while swinging in the direction of arrow A-A' on a rail 2 provided on a shuttle table 1; The hammer bank 3 is configured by a linear motor 15 that drives the hammer bank 3. This linear motor 15 is composed of a moving coil 4, a permanent magnet 5, and a yoke 6, and by changing the direction of the current supplied to the moving coil 4, the hammer bank 3 is moved in the direction of arrow A or arrow A. ’ direction.

The control system that controls this printing system detects the position of the light source 7 attached to the hammer bank 3 so that the hammer bank 3, which performs printing while swinging (running) in the direction of arrow A, detects the position of the light source 7 attached to the hammer bank 3. A print area end sensor 8 that detects when printing has finished and exited the print area; and a control unit 10 that instructs the linear motor 15 to change the direction of the hammer bank 3 based on a signal from the print area end sensor 8. It is composed of:

Below, with this shuttle type line printer device, the Kanji mode line with slow printing speed and the fast printing speed
A printing control method when printing a mixture of ANK mode lines will be explained.

Figure 4 shows the printing speed with Kanji mode printing 11.
This is a diagram showing the motion locus of the hammer bank 3 when printing is performed in two ways in ANK mode printing 12. In the figure, 11 (indicated by a solid line) is the hammer bank 3 when printing a Kanji mode line. The motion trajectory of
12 (indicated by a broken line) is the motion trajectory of the hammer bank 3 when printing ANK mode lines, 13 (broken line) is the hunting phenomenon of the hammer bank 3 caused by a sudden change in speed gradient,
L is the printing area, C is the end point of the printing area (output point of the direction change command to the hammer bank 3), D is the direction change point of the hammer bank 3, and _l1 is the direction change area of the hammer bank (the point where the direction change command is output). (the region in which the hammer bank 3 travels due to inertia until it actually changes direction), V ₁ is Kanji mode printing 11
The running speed of hammer bank 3 when performing, V ₂ is
Hammer bank 3 when performing ANK mode printing 12
The running speed of each is shown respectively.

In the conventional shuttle type line printer device, the running speed of the hammer bank 3 is slow (indicated by V ₁ in the figure).
From Kanji mode printing 11 to ANK mode printing 12 where the hammer bank 3 has a fast running speed (indicated by V ₂ in the figure)
When switching to the linear motor 15, the hammer bank 3 is rapidly accelerated by increasing the amount of current supplied to the linear motor 15 and changing the acceleration gradient of the hammer bank 3 from θ to θ' as shown in FIG. We are hiring.

[Problem that the invention seeks to solve]

Conventional shuttle type line printer devices
As shown in the figure, when switching from Kanji mode printing 11 where the hammer bank 3 has a slow running speed to ANK mode printing 12 where the hammer bank 3 has a fast running speed, the speed gradient is increased (change the speed gradient θ to θ'). ) method is adopted. However, if this velocity gradient changes rapidly, a hunting phenomenon 13 as shown in FIG. 4 occurs.

[Means to solve the problem]

As shown in FIGS. 1 and 2, in the shuttle-type line printer device of the present invention, when the hammer bank 3, which performs printing while swinging on the shuttle table 1, runs at a low speed, the hammer bank 3 moves at a low speed. The hammer bank 3 is commanded to change direction based on the signal from the print area end sensor 8 which operates when the print area end point C is reached, and when the hammer bank 3 is run at high speed, the hammer bank 3 is It is configured to command the hammer bank 3 to change direction based on a signal from the ANK printing direction change point sensor 9 which is activated when the printer passes the printing area end point C and reaches the high speed printing command point C'. ing.

[Effect]

In this shuttle type line printer device, when the hammer bank 3 is run at a low speed, the hammer bank 3 is commanded to change direction when the hammer bank 3 reaches the printing area end point C, and the hammer bank 3 is
When running at high speed, the hammer bank 3 is commanded to change direction when it passes the printing area end point C and reaches the high speed printing command point C'. Since the control method is such that the acceleration gradient θ ₁ when running at low speed and the acceleration gradient θ ₂ when running the hammer bank 3 at high speed are equal to each other, Kanji mode printing 11 to ANK mode printing The hunting phenomenon does not occur when transitioning to 12.

〔Example〕

The present invention will be described in detail below based on Examples.

FIG. 1 is a schematic side view of main parts showing an embodiment of a shuttle type line printer device according to the present invention, and FIG.
The figure shows the locus of motion of the hammer bank installed in this shuttle type line printer device.
The same parts as in FIGS. 3 and 4 are given the same reference numerals.

As shown in FIGS. 1 and 2, the shuttle type line printer device according to the present invention has a hammer bank 3 that performs printing while swinging on a rail 2 provided on a shuttle table 1 in the direction of arrow A-A'. and a linear motor 15 that drives the hammer bank 3 in the direction of arrow A-A′ based on a command from the control unit 10.
The hammer bank 3 reaches the printing area end point C shown in FIG.
Printing area end sensor 8 that operates when reaching
Then, when the hammer bank 3 passes the printing area end point C and reaches the high-speed printing command point C' shown in FIG. 2, the direction change point sensor 9 for ANK printing is activated.
It is equipped with.

The printing area end sensor 8 and the ANK printing direction change sensor 9 are optical sensors that are activated by the incident light beam emitted from the light source 7 attached to the hammer bank 3 side.

The operation of the shuttle type line printer according to the present invention will be described below with reference to FIG.

FIG. 2 is a diagram showing the locus of motion of the hammer bank installed in the shuttle type line printer device of the present invention, in which a is a locus of the hammer bank when printing in the standard mode, and b is a diagram of the locus of the hammer bank when printing in the standard mode. c is a trajectory diagram of the hammer bank when performing only 11, c is a diagram of the trajectory of the hammer bank when transitioning from kanji mode printing 11 to ANK mode printing 12, d is a diagram of the trajectory of the hammer bank when performing only ANK mode printing 12 , e shows a locus diagram of the hammer bank when transitioning from ANK mode printing 12 to Kanji mode printing 11, respectively.

The locus of motion of the hammer bank 3 will be explained in each case based on FIGS. 2a, b, c, d, and e.

FIG. 2a is a diagram showing the motion locus of the hammer bank 3 when printing in the standard mode, in which the hammer bank 3 travels in the printing area L at a predetermined speed and reaches the printing area end point C. Reduce speed and turn around at turning point D. Note that the hammer bank 3 is decelerated at the printing area end point C because the printing area end sensor 8 is activated when the hammer bank 3 reaches the printing area ending point C, and the linear motor 1 is
5 (see FIG. 1), the direction change command for the hammer bank 3 is output. Even after the direction change command is issued from the control unit 10, the hammer bank 3 moves by _l1 due to inertia and reaches the direction change point D during low-speed printing.
You will have to turn around.

Figure 2b shows kanji mode printing 11 with slow running speed.
This is a movement locus diagram of the hammer bank 3 when performing only the above-mentioned operation, and the movement locus of the hammer bank 3 at this time is the same as that in FIG. 2a.

Figure 2c shows kanji mode printing 1, which was problematic in the past.
1 to ANK mode printing 12, the shuttle type line printer device according to the present invention changes the printing mode from Kanji mode printing 11 to ANK mode printing 12.
When shifting to ANK mode printing 12, even if the printing area end sensor 8 detects that the hammer bank 3 has reached the printing area end point C, the controller 1
0 ignores this, and the hammer bank is activated based on the signal from the direction change point sensor 9 for ANK printing, which operates when the hammer bank 3 passes the printing area end point C and reaches the high-speed printing command point C'. 3, a direction change command is output.

In this way, by delaying the output point of the direction change command to the hammer bank 3 by α from the printing area end point C and moving it to the high speed printing command point C', the direction change point D during low speed printing was changed from the previous time. The hammer bank 3, which was changing direction, will now change direction at the high-speed printing direction change point D'. For this reason, the printing mode is changed from Kanji mode printing 11 to
The run-up distance of the hammer bank 3 when shifting to the ANK mode printing 12 becomes longer from l ₁ to l ₂ and its acceleration gradient θ ₂ becomes equal to the acceleration gradient θ ₁ in the case of the Kanji mode printing 11. In this way, Kanji mode printing 1
1, and the acceleration gradient θ ₂ when transitioning from Kanji mode printing 11 to ANK mode printing ₁₂ are equal to each other, then from Kanji mode printing 11 to
When shifting to ANK mode printing 12, hunting phenomenon 13 (see FIG. 4) does not occur.

Figure 2 d shows the hammerbank running at a high speed.
This is a trajectory diagram of the hammer bank 3 when ANK mode printing 12 is performed continuously, and at this time, the speed V ₂ of the hammer bank 3 traveling in the printing area L is the hammer bank 3 when performing Kanji mode printing 11. speed of
Since it is faster than V ₁ , printing is performed at high speed.

Figure 2 e shows ANK mode printing 12 for high-speed printing.
In this case, when the hammer bank 3 changes direction and reaches the printing area L, the area _{l2 is long, so when the hammer bank 3} reaches the printing area L. is decelerated to the traveling speed V ₁ when performing kanji mode printing 11 with a margin.

Although the above explanation is for only the left side of the shuttle type line printer, this shuttle type line printer has a left-right symmetrical structure.

As described above, the shuttle type line printer device according to the present invention is configured such that the acceleration gradients (θ ₁ and θ ₂ ) when performing Kanji mode printing 11 and when performing ANK mode printing 12 are equal to each other. Therefore, no hunting phenomenon occurs when changing the print mode, so high-speed printing can be performed in a stable state.

〔Effect of the invention〕

As is clear from the above description, the shuttle type line printer device according to the present invention is configured so that the acceleration gradient when printing in Kanji mode and the acceleration gradient when printing in ANK mode are equal to each other. Since the hunting phenomenon does not occur when changing the print mode, high-speed printing can be performed in an extremely stable state.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of main parts showing an embodiment of a shuttle type line printer device according to the present invention, and FIG.
The figure is a diagram showing a motion trajectory of a hammer bank installed in a shuttle type line printer device according to the present invention.
FIG. 3 is a schematic side view of a main part showing the structure of a conventional shuttle type line printer, and FIG. 4 is a diagram showing a locus of motion of a hammer bank installed in the conventional shuttle type line printer. In the figure, 1 is a shuttle base, 2 is a rail, 3 is a hammer bank, 4 is a moving coil, 5 is a permanent magnet, 6 is a yoke, 7 is a light source, 8 is a printing area end sensor, 9
is the direction change point sensor for ANK printing, 10 is the control unit, 11 is Kanji mode printing, 12 is ANK mode printing, 13 is the hunting phenomenon, 15 is the linear motor, L is the printing area, C is the printing area end point, C' is the high-speed printing command point, D is the direction change point of the hammer bank, D' is the direction change point of the hammer bank when performing high-speed printing, V ₁ is the traveling speed of the hammer bank when performing Kanji mode printing, and V ₂ is the direction change point of the hammer bank. The traveling speed of the hammer bank when printing in ANK mode, l ₁ is the direction change area of the hammer bank when printing in Kanji mode (the distance traveled by the hammer bank due to inertia before changing direction), l ₂ shows the direction change area of the hammer bank when performing ANK mode printing and when changing the printing mode, and θ, θ ₁ , θ ₂ , and θ′ indicate the acceleration gradient of the hammer bank, respectively.

Claims (1)

[Scope of Claims] 1. A shuttle-type line printer device that performs printing while swinging a hammer bank 3 whose running speed changes in two ways: low-speed running and high-speed running, which swings on a shuttle base 1. When the hammer bank 3 is run at a low speed, the hammer bank 3 is moved in a direction based on a signal from the print area end sensor 8 which is activated when the hammer bank 3 reaches the print area end point c. When a change is commanded and the hammer bank 3 is run at high speed, the direction change for ANK printing is activated when the hammer bank 3 passes the printing area end point c and reaches the high speed printing command point C'. A shuttle type line printer device characterized in that it is configured to instruct a hammer bank 3 to change direction based on a signal from a point sensor 9.