JP3028935B2 - Inkjet printer with condensation prevention mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printer provided with a dew condensation preventing mechanism for preventing dew formation inside.

[0002]

Generally, an ink jet printer (IJP) is often used to write various information such as the date of manufacture on various product containers and labels.

As shown in FIG. 3, this ink-jet printer electrostatically accelerates and deflects fine particles (ink-jet) α of ink ejected from a nozzle 1 by a deflecting electrode plate 2 to form a dot matrix type character. Is a non-impact printer that forms on the object to be written, which is arranged on the side of a conveyor such as a conveyor, and ejects ink toward a container sequentially conveyed by this conveyor to obtain information. Is written.

[0004] Such an ink jet printer is usually installed in a manufacturing plant, but it is subjected to hot water sterilization with hot water from a conveyor or the like before the commencement of operation in a humid day such as a rainy day or in a beverage manufacturing plant. After the operation is performed, dew condensation often occurs around the deflection electrode plate 2 in the ink jet printer, and the ink jet printer often stops due to an abnormal high pressure leak.

[0005] When the ink-jet printer is stopped due to dew condensation, the inside of the ink-jet printer is cleaned with an intensifying liquid, dried by a dryer, and then restarted. The stoppage causes a significant reduction in work efficiency.

[0006] In addition, when dew condensation occurs in the ink jet printer as described above, it causes malfunction or corrosion even if it does not stop. The present invention has been made to solve the problems of the above-described conventional ink jet printer. That is, the present invention can prevent the occurrence of dew condensation in the ink jet printer, thereby reducing the efficiency of product manufacturing due to abnormal stop of the ink jet printer, and preventing the malfunction and corrosion of the ink jet printer. It is an object of the present invention to provide an ink-jet printer with a dew-prevention mechanism capable of performing the above-described operations.

[0007]

In order to achieve the above object, an ink jet printer with a condensation preventing mechanism according to the present invention electrostatically accelerates and deflects fine particles of ink ejected from an ink ejecting nozzle by a deflecting electrode plate. Thus, in an ink jet printer for forming a dot matrix type character on a writing object, air is attached to a casing containing an ink ejection nozzle and a deflection electrode plate with an air ejection port directed toward the inside of the casing. It is provided with an ejection nozzle, and a mounting position of the air ejection nozzle is a position where air ejected from the air ejection nozzle is not directly sprayed on fine particles of ink ejected from the ink ejection nozzle. I have.

The present invention is used in a state where an air supply source such as a compressed air cylinder is connected to the air ejection nozzle. Then, before the operation is started, the air supplied from the air supply source is ejected from the air ejection nozzle into the casing of the printer, so that the moisture in the casing is driven out of the casing. As a result, the humidity in the factory becomes high due to hot water sterilization of the belt conveyor etc. performed before operation, or the humidity in the air is high in rainy weather etc. This condensation is dried even if it is. In addition, since the ejection of air is continued even during the operation of the ink jet printer, the intrusion of moisture into the casing is prevented, so that the occurrence of new dew condensation is prevented.

As described above, according to the present invention, even when dew has formed in the casing of the ink jet printer, the dew can be dried, and the air in the casing can be kept in the air during the operation of the printer. This prevents moisture from entering the casing, preventing the occurrence of new dew condensation in the casing even when the humidity in the air is high. It is possible to prevent a reduction in work efficiency, malfunction of the inkjet printer, and occurrence of corrosion. In addition, since the air ejected from the air ejection nozzle is not directly blown on the fine particles of the ink ejected from the ink ejection nozzle, the fine particles of the ink are deflected by the air ejected from the air ejection nozzle to cause a malfunction. There is no danger.

Further, in the present invention, the mounting position of the air ejection nozzle is such that the air ejected from the air ejection nozzle is not directly blown on the fine particles of the ink ejected from the ink ejection nozzle. It is characterized by.

Therefore, according to the present invention, since the air blown out from the air ejection nozzle is not directly blown to the fine particles of the ink ejected from the ink ejection nozzle, the ink ejected from the air ejection nozzle is used to remove the ink. There is no possibility that the fine particles will be deflected to cause a malfunction.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, an ink jet printer 1
0 is provided with a nozzle 11 for ejecting ink, and a deflection electrode plate 12 for electrostatically accelerating and deflecting the inkjet, and the inkjet α ejected from the nozzle 11 passes between the deflection electrode plates 12 facing each other. When passing through, it is accelerated and deflected by a magnetic field formed between the deflecting electrode plates 12 to form predetermined characters in a dot matrix format on a label attached to a beverage bottle, as described later. Is written.

An air jet nozzle 13 is attached to a casing 10A of the ink jet printer 10 so as to be located below the nozzle 11. A compressed air cylinder 15 is connected to the air ejection nozzle 13 via an air hose 14, and compressed air supplied from the compressed air cylinder 15 via the air hose 14 is ejected into the casing 10A. ing.

The mounting position of the air ejection nozzle 13 is arbitrary as long as the air can be ejected into the casing 10A, but the air ejected from the air ejection nozzle 13 is ejected from the nozzle 11. It is preferable that the ink is not directly sprayed on the ink. If the air ejection nozzle 13 is arranged below the nozzle 11 as shown in the figure, the ejected air is blocked by the lower portion of the nozzle 11. Therefore, there is no possibility of affecting the ink jet α ejected from the nozzle 11.

In FIG. 1, W is a PET bottle container in which information such as the date of manufacture is written by the ink jet printer 10. FIG. 2 shows an inkjet printer 10 which is arranged on the side of a belt conveyor V that conveys PET bottles W and writes the date of manufacture and the number of lots on a label R of the sequentially conveyed PET bottles W. This shows an example of use, and shows an ink jet printer 1
Numeral 0 is fixed to the column 20 disposed at a side position of the belt conveyor V in a state where the ejection direction of the ink jet is horizontal and orthogonal to the conveying direction of the belt conveyor V. Then, the compressed air cylinder 15
Is attached to the machine frame of the belt conveyor V, and supplies compressed air to the inkjet printer 10 via the air hose 14.

The ink jet printer 10 has a compressed air cylinder 15 before and during its operation.
Is opened, the compressed air supplied from the compressed air cylinder 15 through the air hose 14 is blown out from the air blowout nozzle 13 into the casing 10A, thereby generating convection in the casing 10A.

Due to the convection of the air generated in the casing 10A, even when the humidity in the atmosphere around the ink jet printer 10 is high due to the rain or steam during sterilization before operation, dew condensation occurs in the casing 10A. This prevents the inkjet printer 10 from stopping due to the occurrence of a high-pressure leak abnormality.

The air ejected from the air ejection nozzle 13 into the casing 10A is blown to a lower portion of the nozzle 11 by the air ejection nozzle 13 being disposed at a position below the nozzle 11. Is not directly sprayed onto the ink jet α ejected from the printer, there is no possibility of affecting the character formation by the ink jet α.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an example of the best mode of the present invention.

FIG. 2 is a perspective view showing a use state of the example.

FIG. 3 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Inkjet printer 10A ... Casing 11 ... Nozzle (ink ejection nozzle) 12 ... Deflection electrode plate 13 ... Air ejection nozzle 14 ... Air hose 15 ... Compressed air cylinder alpha ... Inkjet

Claims (1)

(57) [Claims] An ink jet printer for forming a dot matrix type character on a writing object by electrostatically accelerating and deflecting fine particles of ink ejected from an ink ejection nozzle by a deflecting electrode plate. An air ejection nozzle attached to a casing containing the nozzle and the deflection electrode plate with an air ejection port directed toward the inside of the casing is provided, and a mounting position of the air ejection nozzle is set at a position where the air ejection nozzle is ejected from the air ejection nozzle. An ink jet printer having a dew condensation preventing mechanism, wherein air is not directly blown onto fine particles of ink ejected from an ink ejection nozzle.