JPH0355266A - Printer - Google Patents

Abstract

PURPOSE:To detect whether ink particles are accurately flown or not and to prevent following trouble from occurring by providing detecting means for detecting passage of the particles on the way of passing the particles. CONSTITUTION:Detecting means D for detecting passage of ink droplets C is provided between a charging electrode 12 and a deflecting electrode 13 in a passing route of the particles C. The means D includes, for example, a light projecting unit 1D and a photodetector 2D to detect passing time of the particles C. That is, a period of time when next particles 2C pass after the particles 1C pass is detected, and when the period is shorter than set time or longer, 'out' is determined to output an alarm by a light for displaying the alarm. Thus, a printing medium is not inaccurately printed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a printing device 1 for printing a loft number, product @, etc. on a printing medium such as a printed wiring board.

Traditionally, in order to print loft numbers, product @, etc. on printed wiring boards, etc., workers had to manually print on each sheet with a stamp, but this method made the work easier. There is a problem in that it is time-consuming, and for this reason, it has been considered to print on the printed wiring board manually using an inkescent printer.

[Problem M1 that the invention aims to solve] However, when the object to be printed is a printed wiring board, it is necessary to perform sophisticated printing, such as preventing stains or ink from seeping into other places. It is necessary to do so. But, ink noe? }If the time from one ink droplet to the next ink droplet is too short or too long in the printer, the ink droplets may be printed while moving the head of the Inknoette printer. There is a risk that the font will not be printed at a predetermined position and stains will occur, or that the printed wiring board or other printing target may be printed in a location that should not be printed and smudged.

The present invention was invented in view of the above-mentioned problems of the conventional technology, and its purpose is to detect the passage of ink particles and detect whether the ink particles are flying accurately. To provide a printing device which can prevent troubles from occurring.

[Means for Solving the Problems 1] The printing device of the present invention includes an inkjet printer A1 that prints by ejecting ink particles, and a detection means D that detects the passage of the ink particles C during the passage of the ink particles C. By employing this structure, the above-mentioned object of the present invention can be achieved.

[Effect 1] The detection means D detects the passage of the ink particles C, detects whether the ink particles C are being ejected in a predetermined state, and if the ink particles C are not ejected in a predetermined state, It is now possible to make a notification and prevent the ink particles C from flying away.

[Example 1] The present invention will be described in detail below based on an example shown in the accompanying drawings.

FIGS. 1 and 2 show a front view and a side view, respectively, showing the entire apparatus of the present invention. A front-rear rail 7 is provided on the base 6, and a left-right rail 8 is attached to the left-right rail 8 so as to be movable in the front-rear direction relative to the front-rear direction I/-luma. A head 2 of printer A is attached so as to be movable in the left and right direction. and,
The above-mentioned front-back rail 7, the left-right rail 8 attached to it so that it can be moved back and forth, and this movement 8! With the structure, the means of movement 3 in the forward and backward direction is l + 1! A left-right moving means 4 is constructed by a left-right rail 8, a head 2 movably attached to the rail 8, and this moving mechanism. to γ
The door 2 is rotatable in plan view by a rotating means 5 such as a motor or an air cylinder, and the rotation angle by the rotating hand 5 is arbitrary, but for example, 90"180".
It is designed to rotate like this. The inkjet printer A is configured to eject ink particles C that are charged from a head 2 and deflected according to the amount of charge.

The inkjet printer A used here is a well-known inkjet printer (for example, a so-called charge control type) from Japan. This charge control type divides the characters to be marked into pixels into a dot matrix, charges the ink particles C with a voltage proportional to the position information of each pixel, and then deflects the ink particles with an electrostatic field to mark the object to be marked. (that is, a printed wiring board in the present invention), the pixel characters (characters composed of dots) are marked.

FIG. 3 shows a diagram of the principle of this Ink Noette printer, in which the ink stored in the ink container 15 is transferred to the cylinder 1.
The liquid is pressurized by 0 and is ejected from the head 2 in the form of a liquid column. The liquid column ejected from the head 2 has a certain size due to the vibration of the electrostrictive element 11! This ink particle C becomes a large ink particle C, and each ink particle C is charged with a voltage corresponding to the signal voltage by the charging electrode 12, and when this charged ink particle C passes between the deflection electrodes 13, the amount of charge increases. The ink particles C, which are deflected accordingly and are not used for printing, reach the moving marking object and are captured by the ink tank 14 as shown by the arrow in FIG. Incidentally, in the present invention, the passage of the ink particles C is detected between the @electrode 12 and the deflection IL pole 13 during the passage path of the ink particles C. A detection means D is provided.The detection means D is composed of a light emitting device 8!ID and a light receiving device fi2D, for example, as shown in FIG. In other words, in FIG. 4, the time from when the ink particle IC passes until the next ink particle 2C passes is detected,
If this time is too short than the set time, or if it is too long, it will be determined that it is out and an alarm will be issued, such as an alarm or a warning display using light, or if the deflection electrode 13
control to completely deflect the ink particles C so that they do not hit the printing object 1, or move the partition plate 20 as shown in FIG. 13 to control the ink particles C.
The ink is captured in the evening 14 and collected into the ink container 15 by the collection bomb 17.

Here, the detection means D not only detects the time between the ink particles C, but also detects the size of the ink particles C, and detects whether the ink particles C are too large or too small than a predetermined size. In this case, it is determined that it is out and a similar warning is issued, such as an alarm or alarm display, or the deflection electrode 13 is completely deflected using control 1 so as not to hit the printing object 1, or, The ink particles C can be shut off by moving the partition plate 20 shown in FIG.
Alternatively, the ink may be collected into the ink container 15.

Thus, the above-described apparatus is used to print on the printed wiring board 1. That is, a printed wiring board, which is the object to be printed 1, is placed on the mounting surface 16 on the upper surface of the base 6 of the device, and a loft is placed on the printed wiring board 1 at a predetermined position by the head 2 of the printer A described above. It prints numbers, product numbers, etc. When the detection means D detects the passage of the ink particles C ejected during printing and the ejection state is out of setting, an alarm such as an alarm or a warning display with light is issued, or the deflection electrode 13 control to completely deflect the ink particles so that they do not hit the printing object 1, or move the partition plate 20 to shut off the ink particles C by moving the partition plate 20 as shown in FIG. 13 to control the ink particles C.
Ink container 1 was captured and recovered by bomb 17 on evening-14.
5.

By the way, the above-mentioned amount of movement in the front-back direction by the back-and-forth direction moving means 3 of the hen door 2 of printer A, the amount of movement in the left-right direction on the left-right moving means 4, and the rotation angle by the rotating means 5 are the printed wiring board to be printed. 1, and when printing on the corresponding printed wiring board 1, the head 2 of printer A automatically moves and rotates based on the above teaching to print. It has become.

It should be noted that the printer of the present invention is continuously supplied with printed matter 1, ie, a wiring board, by a conveying device (not shown), and is placed on the mounting surface 16 on the upper surface of the base 6. & Printer A
It is also a good idea to print at a predetermined position using the head 2 of the printer, and when the printing is finished, to automatically transport the sheets one after another by a transport device (not shown).

[Effects of the Invention] In the present invention, It! As described above, an inkjet printer that prints by ejecting ink particles is provided with a detection means that detects the passing of ink particles while the ink particles are passing. It detects whether or not particles are being ejected in a predetermined state, and if they are not being ejected in a predetermined state, a notification is issued and the flying of ink particles is prevented to prevent inaccuracies on the printing material. There is no possibility that the ink will overlap and stain, or that the printing material will be smeared by printing in a place that should not be printed.

[Brief explanation of drawings]

#S1 is a front view of the present invention, FIG. 2 is a side view of the same as above, FIG. 3 is a schematic original view of the same inkjet printer as above, and FIG. 4 is an explanatory diagram showing detection of ink particles by a detection means.
FIG. 5 is a schematic diagram of an embodiment in which a partition plate is provided according to the present invention, in which A is an ink printer, C is an ink particle, and D is a detection means.

Claims (1)

[Claims] (1) An inkjet printer that prints by ejecting ink particles, which is characterized by being provided with a detection means for detecting the passage of ink particles during the passage of the ink particles.