JPS6033013Y2 - Inkjet recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inkjet recording device, and particularly to an inkjet recording device suitable for an industrial marking device.

As an inkjet type industrial marking device, a device that records various printing contents on various industrial production items, such as printing date of manufacture and lot number on beverage cans such as juice, has been developed and is being commercialized. be.

These marking devices are mainly composed of the following four units.

That is, as shown in FIG. 1, there is a tank 1 that stores ink 2 and supplies it to the nozzle 8, a tank 16 that sucks and collects surplus ink particles 12 that are not used for printing in the nozzle section, and the like.
Air related equipment to drive these, namely manual valve 4, filter 5, regulator 6, solenoid valve? , 19.2
0, a vacuum pump 17, a check valve 18, etc. As shown in FIG. a nozzle 8 for printing and capturing excess ink particles 12;
A control unit (Fig. (not shown) and a circulation unit (not shown) that supplies the power necessary to drive the electrical control unit.

In FIG. 1, 3 is an air source, and 14° and 15 are connecting tubes.

Of these four units, the circulation unit, control unit, and power supply unit are combined into the main body, and only the nozzle unit is independent from the main body.The main body and nozzle unit are interconnected using electrical cables, pipes, etc. is connected to.

The reason for assembling the main body and nozzle unit separately in this way is that the nozzle unit, which is the printing part that is attached to the manufacturing conveyor, is desired to be miniaturized, and when this device is installed on multiple manufacturing conveyors, the nozzle With the exception of this unit, other units can be shared by simply increasing their capacity, and costs can be significantly reduced by configuring one unit (circulation unit, control unit, power supply unit) and multiple nozzle units, etc. This is for the sake of

By the way, in the configuration of a main body that combines a circulation unit, a control unit, and a power supply unit into one, conventionally, the circulation unit, control unit, and power supply unit are sequentially housed in one housing from the bottom to the top, and Holes were provided at the bottom and top of the housing to allow the generated upward airflow to dissipate heat generated by electrical components.

However, as a result of various studies, it has been found that it has the following serious drawbacks.

In other words, it is fine if the ink solvent used is non-flammable or flame-retardant, such as water, but if it is flammable, the flammable organic solvent that volatilizes in the circulation unit passes through the control unit and power supply unit due to upward airflow. There is a risk of an explosion or fire occurring due to sparks generated by these electrical units.

In particular, recently there has been a demand for strong adhesion of ink to the printed material.
Furthermore, in order to deal with the surface coatings that make up various printing materials, many inks using solvents that are considered dangerous under the Fire Service Act are being developed and used, so this is a serious problem. .

In addition, these organic solvents may have an adverse effect on the control unit and power supply unit.

An object of the present invention is to eliminate the drawbacks of the prior art described above and provide a highly safe inkjet device.

In order to achieve this objective, the present invention stores ink circulation system components and electrical system components including solenoid valves in separate rooms separated from each other in a housing. It is characterized by preventing flammable solvent gas from flowing into electrical components.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

The casing that houses the main body consists of first and second casings 21 and 22 stacked vertically, and these casings are connected to each other by bolts 23.

The first housing 21 houses all electrical components including a power supply unit 24, a control unit 25, a solenoid valve 26, and an operating section 27.

Further, an opening is provided in the upper part of the first casing 21, and a fan 29.30 sucks cooling air into the casing 21 from the outside through a filter 28.
The cooling air that has cooled the electrical components therein is discharged into the second casing 22 through an opening at the bottom of the casing 21 by a fan 31 attached to this part.

The air vent of the solenoid valve 26 is airtightly fixed to the second housing 22 with a connector 32, and a urethane foam backing (not shown) is provided between the door 33 and the first housing 21. This ensures airtightness from the outside.

Further, the relationship between the air volume Q1 on the suction side and the air volume Q2 on the discharge side of the fan 29.30 provided in the first casing 21 is set such that Q>Q2, and Static pressure is set to be higher than atmospheric pressure.

On the other hand, a circulation system unit 34 is housed in the second casing 22, and a discharge port 35 is provided at the bottom. It is also kept airtight.

In addition, in FIGS. 2 and 3, 37 is an eye bolt, and 38 is an eye bolt.
39 is a handle of the door 36, 40 is a base, 41 is an input power cable, and 42 is a circulatory system connection pipe.

Therefore, the cooling air sucked from the upper opening of the first housing 21 by the fans 29 and 30 flows as shown by arrows in FIG. After cooling, the air flows into the second casing 22 through the lower opening by the fan 31 and is discharged to the outside through the lower exhaust port 35.

As a result, the electrical components are cooled well, and the organic solvent gas of the ink generated from the circulation unit 34 is
Since the electrical parts are discharged outside without being distributed,
It is possible to prevent explosions and fire accidents, and also to prevent the adverse effects of organic solvent gas from ink on electrical components.

Furthermore, since the cooling air is sucked into the housing 21 through the filter 28, and each housing 21, 22 is kept airtight from the outside, dust from the surrounding environment does not enter into each of these housings. It is always kept clean.

Furthermore, since the casing is divided into the second and second base casings 21 and 22, it is possible to obtain the effect that packaging, transportation, carrying-in, etc. are facilitated.

Note that the present invention is not limited to the configuration described in the above embodiments, and various modifications are possible.

For example, one case may be used, the inside of this case may be divided into upper and lower parts with a partition plate, and the electrical components may be stored in the upper room and the circulation unit may be stored in the lower room, as in the previous embodiment. Cooling air can also be circulated within each of these rooms.

As explained above, according to the present invention, the flammable solvent gas of the ink generated in the circulation system parts does not flow into the electrical system parts, so it is possible to prevent explosions and fire accidents, and
It is also possible to prevent the adverse effects of this flammable solvent gas on electrical components, thereby making it possible to improve their safety and reliability.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an inkjet recording apparatus, FIG. 2 is a front view of the main body of the inkjet recording apparatus according to an embodiment of the present invention, and FIG. 3 is a vertical side view of the main unit. 21... Upper housing, 22... Lower housing, 24... Power supply unit, 25... Control unit, 26... Electromagnetic Valve, 27...
・Operation unit, 29-31...Fan, 34...
...Circulation unit.

Claims (1)

[Scope of utility model registration request] An inkjet recording device comprising a main body consisting of ink circulation system parts and electrical system parts including a solenoid valve, and a nozzle unit configured independently from the main body,
a first partition that separates the electrical system component and the circulatory system component from each other;
A ventilation device is provided, which is housed in each of the second casings and allows cooling air to flow from the first casing that houses the electrical components toward the second casing, and cools the first casing. The inkjet is characterized in that the air volume on the suction side is set larger than the air volume on the discharge side, and the cooling air is configured to flow through the first housing and then be discharged to the outside through the second housing. Recording device.