JPH0538819A - Air brush device for image drawing - Google Patents

Abstract

PURPOSE:To provide an air brush device for image drawing, which can create a correct color gradation without applying an adjusting means for feeding air pressure. CONSTITUTION:Three shelf members 1 are tiltably supported by a box shaped movable body A in a stair state with hinges 3 as supports, and an air brush unit for which a plurality of air brushs for image drawing are arranged for each color is loaded on each shelf member 1. The other ends of respective shelf members 1 are commonly supported by a movable plate 4, and the movable plate 4 is suspended on the movable body side by a leaf spring 8, and all the shelf members are integrated by inserting the leading end of an operation lever 10 in a plurality of positioning holes 4a which are provided on the movable plate 4, and thus the shelf members 1 can be set a horizontal position or a position with a required tilted angle. When ink jetting is performed with the air brush unit at a horizontal position, gradation expression for 1 dot (picture element) is made by using a plurality of air brushes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing air brush device used in an automatic drawing device or the like.

[0002]

2. Description of the Related Art In an automatic drawing apparatus developed as a full-color image printing system for printing a super-large screen with a large number of fine pixels, an ink jet type pen is used as an ink jet type pen by a negative pressure generated by air jetting. An air brush is used that draws ink from the ink and ejects it.

[0003]

In the above air brush, a means for controlling the air pressure supplied to the air brush to adjust the ink ejection amount is applied as a means for creating the color gradation of ink. It is difficult for this adjusting means to finely adjust the air pressure, and since the injection pressure at the air injection port is likely to change due to fluid friction in the supply path, it is difficult to obtain a color gradation adapted to the supply air pressure.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drawing air brush device capable of producing an appropriate color gradation without applying a supply air pressure adjusting means.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a plurality of air brush units, each of which is composed of a plurality of air brushes arranged in a horizontal row for each color, are supported on a moving body in a stepwise manner and tiltably. It is characterized by that.

[0006]

In the drawing air brush device having the above-described structure, the proper color gradation is created by ejecting the ink while the air brush unit is horizontal or inclined.

When the air brush unit is in the horizontal state, one line of print is obtained even if there are a plurality of air brushes, but a desired color gradation can be obtained depending on the number of air brushes ejecting ink. For example, one gradation of dots (pixels) is printed by one airbrush, and 15 gradations of dots is printed by 15 airbrushes.

On the other hand, when the air brush unit is tilted, one air brush prints one line, but the desired color can be obtained by ejecting ink from a plurality of air brushes and adjusting the tilt angle. Gradation can be obtained.

[0009]

1 to 7 show a preferred embodiment of the present invention. In the figure, A is a box-shaped moving body, and in this box-shaped moving body A, three shelf board members 1 are arranged stepwise. One end of each shelf board member 1 is a moving body A.
Is rotatably supported on the side plate 2 via a hinge 3, and the other end of each shelf plate member 1 is rotatably supported on a movable plate 4 via a support shaft 5. The upper end of the movable plate 4 is suspended by the winding plate spring 8 of the roll 7 provided on the upper plate 6 of the moving body, and a plurality of holes 4a for movable positioning are provided at required portions thereof. The other side plate 9 of the moving body A is provided with an operation lever 10 through which a guide hole 9a is passed from the outside, and the movable plate 4 is manually operated to move the lever tip to any one of the holes 4a on the movable plate side. By inserting, the three shelf board members 1 supported in stages can be set and supported at a horizontal position or an inclined position having a required inclination angle.

On each of the shelf members 1, 12 to 12 are provided.
Fifteen drawing air brushes 11 are provided in a horizontal row,
The upper stage is a blue air brush unit, the interruption is a red air brush unit, and the lower stage is a yellow air brush unit.

The moving body A is arranged in an automatic drawing apparatus as shown in FIG. In the figure, 12 is a sheet member forming a print screen, 13 is a sheet member unwinding roll, 14 is a winding roll, 15 is a platen, 16
Is a platen drive motor, 17 is a pinch roll, 18 is a guide roll, 19 is a backing member for the sheet member, and the moving body A is in front of the sheet member 12 and moves in the width direction (X-axis direction) of the sheet member. Arranged freely. FIG. 2 shows an example of the support means for the moving body A. In the figure, 20 is a track rail, 21 is a support base for a moving body, 22 is a rail for guiding the moving body on the base in the Z-axis direction (direction facing the sheet member), and 24 is a Z-axis distance scale. Reference numerals 25, 25 are operation knobs that also function as stoppers in the Z-axis direction of the moving body, and a timing belt (not shown) for connecting the base 21 and moving the moving body A in the track rail 20. Is provided. FIG. 5 shows a state in which ink is ejected from the air brush 11 to the sheet member 12 while the moving body A is moving.

Next, a color gradation method created by using the drawing air brush unit of the moving body A will be described with reference to FIGS.
Will be described. The color gradation method includes a density gradation method and an area gradation method.

1) Density gradation method With the density gradation method using a plurality of air brushes, printing can be performed by the following two methods. Single method (Fig. 6) This method uses multiple air brushes of each color and one air brush prints one line. The printing speed is about 1 / n (n is the number of air brushes) faster than that of one air brush. However, it is sensitive to the variation of n air brushes and it is easy to form a striped pattern.
It is necessary to accurately adjust the ink density of the brush in advance. Multi method (Fig. 7) 1 dot gradation expression is performed using multiple air brushes. For example, with 15 air brush units,
One gradation of dots is printed by one airbrush and one
Five air gradations are printed by 15 air brushes. The print speed is inferior to the single method. Gap adjustment for each air brush is adjusted to the same depth.

2) Area gradation method Printing is performed by the area gradation method using a plurality of air brushes. Calculating the time required to print 1 dot, the minimum open time (ink jet type) to obtain the maximum density with the current air brush is about 2 mm · sec (when the pitch is 2 mm), which is the processing time of the CPU. The time required for one dot of one air brush is 1.5 mm · sec, and 3.5 mm · sec in total. For this reason, the area gradation method does not require a dynamic range of density, so that the printing speed can be increased. Incidentally, in the density gradation method, the time required for one dot of one air brush is 7 mm · sec, which is about twice as long as in the area gradation method.

Next, the configuration of each part of the automatic drawing apparatus other than the drawing air brush apparatus will be described with reference to FIGS.

The unwinding roll 13 shown in FIG. 4 has a width of about 4 m.
Wide sheet member (synthetic resin sheet with woven cloth)
It is a long roll corresponding to, and since it becomes a considerable weight when the sheet member is wound, a lift mechanism by power is required.

8 to 10 show the power lift mechanism. In the figure, reference numeral 26 is a raw material roll. The roll 26 rolls the sheet material 12 into the unwind roll 13 placed on the carriage 27, and then the carriage 27 is mounted on the chain lifter B installed on the left and right of the machine body 28. Get closer. The chain 29 of the chain lifter B is equipped with a pedestal 30. The pedestal 30 is positioned at the same height as the carriage 27, and the unwind roll 13 on the carriage 27 is moved.
The air cylinder member 31 provided on the pedestal 30 side is operated to press the shaft of the unwinding roll 13 with the lock plate 32,
Next, the chain 29 is driven by starting the stepping motor 33, the unwinding roll 13 is provided on the machine body 28 side and lifted to a fixed position where it hits the bearing 34, and the shaft of the roll 13 is sandwiched between the pedestal 30 and the bearing 34. The unwind roll is then set in place.

Since the screen sheet member 12 used in the above automatic drawing apparatus is made of a special material and is a relatively expensive sheet material, it is desirable to use the non-printed area as small as possible.

11 and 12 show a joint C for a sheet member used for that purpose. The joint C is composed of a belt 35 having a predetermined length, a hook 36 attached to one end thereof, and a clip 37 attached to the other end. The clip 37 is formed by assembling a spring 37c on the pinching pieces 37b, 37b having the pin 37a as a pivot.

The joint C is the sheet member 1 pulled out from the unwinding roll 13 at the start of drawing printing.
When fixing 2 to the take-up roll 14, the take-up roll 14
In the hole of the receiving portion 38 provided in the stepped concave portion of the hook 36
Is inserted, and the edge of the sheet member 12 is clamped by the clip 37. As a result, as shown in FIG.
It is possible to eliminate the waste of the sheet member that hits the non-printing area between the roll and the take-up roll 14.

[0021]

As described above, according to the present invention,
Since a plurality of air brush units, each of which is formed by arranging a plurality of air brushes for each color in a horizontal row, are tiltably supported by the moving body, without using a means for adjusting the air pressure supplied to the air brushes, It is possible to create an appropriate color gradation.

[Brief description of drawings]

FIG. 1 is a rear view of an air brush device for drawing showing an embodiment of the present invention.

FIG. 2 is a perspective view of an air brush device for drawing.

FIG. 3 is a side view of the air brush.

FIG. 4 is an arrangement configuration diagram of an air brush device.

FIG. 5 is a plan view of an air brush unit that ejects ink onto a sheet member.

FIG. 6 is an explanatory diagram of a case where an air brush unit is tilted to create a color gradation.

FIG. 7 is an explanatory diagram of a case where a color gradation is created by horizontally setting an air brush unit.

FIG. 8 is an explanatory diagram of a work for lifting the take-up roll to the upper part of the machine body.

FIG. 9 is a perspective view of a chain lifter for lifting a winding roll.

FIG. 10 is an enlarged side view of a portion of the lifter.

FIG. 11 is a perspective view showing a state where the sheet member joint is mounted on the winding roll.

FIG. 12 is a side view of the seat member joint in a used state.

[Explanation of symbols]

 A moving body 1 shelf plate member 3 hinge 4 movable plate 5 spindle 7 roll 8 leaf spring 10 operating lever 11 drawing air brush 12 sheet member 13 unwinding roll 14 winding roll 15 platen 17 pinch roll 18 guide roll 20 track Rails 21 Mobile support bases 22 Guide rails

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location 9012-2C B41J 3/04 103 X

Claims (1)

[Claims] 1. A plurality of air brush units, each of which is formed by arranging a plurality of air brushes for each color in a horizontal row,
An air brush device for drawing, which is supported by a movable body in a stepwise manner and tiltably.