JPS61177249A - Printer - Google Patents

Abstract

PURPOSE:To enable a printing to be conducted with high adhesion and clear contrast as well as at high speed even when using a non-plane formed piece to be printed, by engaging slidably a sliding portion through elastic bodies forcing the work portions of the tip ends of hollow poppet valve formed dot elements in the direction of separation thereof. CONSTITUTION:Plural dot elements 1 provided with springs 8 are arranged in line on a rectangle frame 20, and the upper portion 20B thereof contains an ink branch pipe 25 and also connected to a rod 11 of an air cylinder 10 mounted on an outer frame 21. The rectangle frame 20 is so designed as to slide longitudinally along with the guide in the outer frame 21. Ink 13 is discharged on the front surfaces of the work portions and turns to discharge ink 14 before the work portions of the dot elements are brought into contact with the piece to be printed. Subsequently, the dot elements come near to the piece to be printed and in pressure contact therewith, which causes discharge ink to be pressed in the center thereof by the fronts of the work portions of the dot elements to form ring-shaped banks on the outer circumferences thereof. Thus, the contrast of the printing results in being improved. This printer is particularly available for iron/steel or metal product such as a heat rolling coil or a cold rolling coil applied with rust-proofing oil.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing device, and more particularly to a dot printing device that can easily print not only on flat surfaces but also on curved surfaces.

The present invention also relates to a printing device capable of simultaneously printing in multiple colors.

- [Prior art and its moving points] Traditionally, handwriting with a brush or the like is used as a starting point, and printing using a stencil or a handwritten y, -xy drafter is also performed.

In addition, printing devices have also appeared in which a plurality of dot nozzles are lined up, each dot nozzle is selectively activated, and printing is performed by ejecting ink Y at the same time.

On the contrary, it goes without saying that handwriting is extremely inefficient and the printing is unclear, and when using a stencil, the printing is clear but not only is it difficult to follow the unevenness of the surface of the printed object, but the efficiency is no different from handwriting. The stencil itself had to be replaced when the characters changed, and the worker's hands were likely to get dirty, and the burden on the worker was sometimes greater than handwriting.

Is it the operator who prints with the X-Y drafter? Although it is not necessary,
- The printing speed was slow due to the brush writing, and there were problems such as the inability to follow the curved surface of the printed object and unevenness, parts of the print being chipped, and the brush function part getting stuck. There was also a tendency for ink to run out.

The dot nozzle method has the advantage of high printing speed and good ability to follow the irregularities on the surface of the printed object, but it has the inherent disadvantage of poor printing contrast, and is also prone to damage to the printed object and the printing device itself due to ink scattering. There was a problem that pollution of the surrounding area was unavoidable.

Furthermore, although it is not impossible to print in multiple colors using the dot nozzle method, as mentioned above, the contrast is poor, resulting in color bleeding and blurring.

[Purpose of the invention]

The purpose of the present invention is also for non-planar printed objects.

To provide a printing device that can print Z characters with clear contrast and good adhesion at high speed.

Another object of the present invention is to provide a high-speed printing device that is easy to maintain and less likely to cause contamination of the surrounding area.

Still another object of the present invention is to provide a high-speed printing device that enables clear multicolor printing.

[Structure of the invention]

According to the present invention, there is provided a hollow saw-valve-shaped dot consisting of a tip acting part having one or more ink discharge ports, and a cylindrical sliding part fixed to the acting part and having an ink hose connector and a stopper at its rear end. An elastic body that biases the element and the tip acting part of the dot element in a direction that separates them! There is provided a printing device characterized by comprising a frame body into which the sliding portion is slidably fitted through the frame body.

The present invention will be described in detail below using examples.

FIG. 1 is a sectional view of the main parts of the present invention.

In the Th1 diagram, the hollow saw-shaped dot element 1 is placed facing downward.

Although the tip acting portion 2 of the dot element 1 is flat in this embodiment, it is of course possible to have a convex or concave shape.

Also, the action part itself is usually made of metal, but it is made of rubber.

It may be made of a material with poor rigidity such as plastic or cloth. Of course, highly elastic metals can also be used.

However, the action section 2 must necessarily have one or more ink discharge ports 3 through which ink passes. The shape of the ink ejection opening 3 is most commonly a round hole, but it may also be of a complicated shape such as cloth.

There is a cylindrical sliding part 4 on the acting part corresponding to the umbrella part of the mushroom valve.
is welded, and an ink hose connector 5 and a stopper 6 are provided at its upper end.

Here, the ink hose connector 5 is a connector for connecting the ink hose 7 and the driver 1'P. This is to prevent it from slipping out. The spring 7 is an example of an elastic body.]
, rubber, plastics, a cylinder mechanism, or an electromagnetic solenoid mechanism.

[Operation of the present invention]

Fig. 2 is a cross-sectional view of the action part of the dot element, Fig. 3 is a bottom view of the action lower surface, and Fig. 4'' shows that the action part is in pressure contact with the plane of the printing object via the ejected ink! FIG. 5 is a plan view showing the state of ink after printing.

Ink is supplied from the ink tank to the action portion of the dot element through the ink hose by a light back pressure such as air pressure.

The viscosity of the ink is relatively determined by the diameter of the ink ejection opening of the working part, but a paste-like ink with a slightly higher viscosity is preferably used for the applications described below. In this case, the diameter of the ink discharge port is conveniently about 0.1 to 0.8 mm. Note that if the ink is of low viscosity, the above-mentioned working part made of cloth or the like is used, and the ink ejection holes are extremely small.

In the present invention, the paste-like ink includes, for example, one in which milk of lime or glaze is dispersed in water as a dispersion medium, etc.
Various ordinary printing inks (including organic and inorganic pigments)
-, < is a concept that also includes coating compositions such as dyes, metal powders) and paints.

As shown in FIGS. 2 and 3, the ink 13 is ejected onto the surface of the action part before the dot element action part comes into contact with the object to be printed, and becomes ejected ink 14.

Next, when the dot element approaches the printing object 30 and comes into pressure contact with it, the ejected ink is deformed as shown in FIGS. 4 and 5, and its shape is maintained even after the dot element is separated. After printing, the central part of the ejected ink is crushed by the front surface of the dot element action section, and a ring-shaped bank sound is formed around the outer periphery.

As a result, the contrast of printing is significantly improved.

The ink attached to the printing object is then dried naturally or by heating.

1. Note that the dot element is the minimum unit of a printing device, and printing or pattern printing can be obtained by using a large number of these dot elements together.

[Application examples of the present invention]

FIG. 6 is a front view showing an applied embodiment of the present invention in which parallel elements are arranged in a row.

In FIG. 6, a plurality of dot elements 1 are arranged in a rectangular frame 20.
The ink branch pipes 25 are built into the rectangular frame 20, and the upper frame 2oB is further connected to the rod 11 of the air cylinder 10 provided in the outer frame 2. At the same time, the rectangular frame body 20 is connected to the guide 2 of the outer frame 21.
2 (not shown) up and down.

Figure 7 shows numbers printed by further combining the row-shaped dot elements shown in Figure 6! FIG.

By combining in this manner, numbers from .theta. to 9 can be easily printed by selectively activating each column-shaped dot element group.

Furthermore, the dot element group 7 can be given a desired planar shape to completely fill the required area.

In this case, it is of course possible to electrically selectively operate only the dot elements or dot element groups corresponding to printing or pattern printing in combination with a known control device.

In addition, multicolor printing is also possible by changing the ink for each dot element or dot element group.

[Effects of the present invention]

By implementing the present invention, all of the above objectives are achieved.

That is, it is possible to print accurately and with clear contrast at high speed on a printing object having an uneven surface.

It is also possible to print any pattern in multiple colors at the same time.

The present invention is particularly useful for steel and metal products such as hot-rolled coils and cold-rolled coils coated with rust preventive oil Z, but it goes without saying that it is also useful for other uses.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the dot element of the present invention, Fig. 2 is a sectional view of the action part of the dot element θ), Fig. 3 is a bottom view of the action lower surface of the dot element, and Fig. 4 is a sectional view of the dot element. FIG. 5 is a front view showing the state in which the action part is in pressure contact with the plane of the printing object via ejected ink, FIG. 5 is a plan view showing the state of the ink after printing, and FIG. FIG. 7 is a front view showing an applied embodiment, and FIG. 7 is a bottom view of an embodiment in which the Do Soto and Seiko groups are combined. 1-1----de soto element, 2----1-
-Tip acting part, 3-----Ink discharge port, 4--
--Cylindrical sliding part. 13-----ink, 14--one discharge ink. Fig. 1 Fig. 2 Fertilizer Fig. 3 2...Tip acting part 14 - Ejected ink 13 Ink 14 - Ejected ink foil 4 times 5 Fig. 14... Ejected ink Fig. 6 ■... Dot element 7...・Ink hose 8 ・Spring 10 ・Air cylinder 11 ・Lot 20 ・Rectangular frame 20B ・・Upper frame 21 ・Outer frame Fig. 7 1 ・・Dot element 20 ・・・Rectangular frame

Claims (5)

[Claims] (1) A hollow saw-shaped dot element consisting of a tip acting part having one or more ink discharge ports and a cylindrical sliding part fixed to the acting part and having an ink hose connector and a stopper at its rear end, and dots. 1. A printing device comprising: a frame body into which the sliding portion is slidably fitted via an elastic body that biases the tip end acting portion of the element in a direction to separate the element. (2) The printing device according to claim 1, wherein the dot elements are arranged in rows or groups. (3) The printing device according to any one of claims 1 to 2, comprising an automatic pressure mechanism that presses one or more dot elements close to the object to be printed. (4) The printing device according to any one of claims 1 to 3, wherein the ink is a paste ink. (5) The printing device according to any one of claims 1 to 4, which supplies ink of a different color to each dot element forming one or more groups of dot elements.