JP3828994B2 - Marking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides an internal illumination type or a light emitting element in which a lighting device such as a fluorescent lamp and a light bulb is disposed inside, and a fixed or subtitle type display is provided, and the display is internally illuminated by the lighting device. The present invention relates to an improvement of a drainage portion for discharging water accumulated in the labeling device due to condensation in the labeling device having a matrix arranged on the front surface.
[0002]
[Prior art]
Conventionally, a lighting device 11 such as a fluorescent lamp is housed in a signage device installed on a road as shown in FIG. 4 or a signage device 1 loaded on a construction vehicle. When the difference between the inside temperature and the outside temperature increases, condensation occurs and water accumulates in the marking device 1. Therefore, a drain hole 12a shown in FIG. 5 is formed in the bottom plate 12 of the marking device 1 for drainage of the dew condensation water, and drainage is performed from the hole 12a.
[0003]
Normally, the drain holes 12a are formed in two or three places on the bottom plate 12, and a drain cover 2 is attached to the lower surface of each drain hole 12a by a tapping screw (not shown). The drainage cover 2 is also formed with a drainage hole 21 that is displaced from the drainage hole 12a (see FIG. 5).
[0004]
[Problems to be solved by the invention]
By the way, in the sign device 1 installed on the road, when a strong wind blows or when the vehicle starts or stops in the loading sign device 1, the sign device 1 causes the display window 13 to vibrate. The entire marking device 1 will breathe.
[0005]
That is, in the signage device 1 having a width of 1800 mm and a height of 1200 mm as shown in FIGS. 6 (a) and 6 (b), if the display surface bends 1mm inside when the wind starts or the vehicle starts, The air flows as follows from the holes 12a and 21.
[0006]
If the deflection of the display surface in the marking device 1 becomes a quadrangular pyramid, its volume V is
V = 1/3 · ha
h: Depth of distortion a: Display surface area V = 1/3 × 1 × (1800 × 1200) = 72000 mm ³
[0007]
Since this volume of air flows in and out of the three drain holes 12a and 21 having a diameter of 10 mm, the air flowing in and out of the drain hole 12a per piece is 24000 mm ³ . Therefore,
24000 = πr ² × H
r: radius of the water drain hole 12a H: amount of movement of air passing through the water drain hole 12a H = 24000 / πr ²
= 305mm
That is, the air in the vicinity of each drain hole 12a (air containing moisture) moves close to 305 mm.
[0008]
Therefore, air containing moisture is sucked into the marking device 1 through the drain holes 12a and 21 described above, and in particular, antifreezing agents (such as sodium chloride) sprayed on the road surface in the winter are scattered. In that case, the mist will be sucked. When the air containing the moisture and the antifreezing agent are sucked, rust is generated inside, and the labeling device 1 is corroded, resulting in a problem that the reliability of the labeling device 1 is lowered.
[0009]
The present invention is intended to solve the above-mentioned problems, and the object of the present invention is to prevent moisture or air from being scattered even if the marking device is in a breathing state without hindering drainage. An object of the present invention is to provide an improved labeling device so that the antifreeze agent is not sucked into the labeling device.
[0010]
[Means for Solving the Problems]
The marking device of the present invention is intended to achieve the above-described object, and the means thereof includes a lighting device such as a fluorescent lamp and a light bulb, and has a fixed or subtitle type display. internally illuminated and adapted to UchiTeru the display, or the labeling device arranged light-emitting element in the matrix form, with a valve unit which closes the drain hole formed in the bottom plate of the labeling device flexible The film sheet which has property is attached.
[0011]
The film sheet is preferably attached via a spacer so that the valve portion forms a gap with respect to the drain hole.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a labeling apparatus according to the present invention will be described with reference to FIGS.
In addition, since the whole structure of the label | marker apparatus 1 does not change with the former, only a principal part is demonstrated.
A feature of the present invention is that a thin film sheet 4 made of synthetic resin is attached to the bottom surface of a drain hole 12a formed in the bottom plate 12 of the marking device 1, and when the marking device 1 breathes and sucks outside air, the film sheet 4 The drain hole 12 is closed. The film sheet 4 is not limited to a synthetic resin, and may be a metal thin plate, for example.
[0013]
Insertion holes 41 are formed at the four corners of the film sheet 4, and a valve portion 42 that closes the drain hole 12 a is formed by forming cuts 43. The film sheet 4 is attached to the bottom plate 12 of the labeling apparatus 1 via frame-like spacers 5 having substantially the same thickness as the film sheet 4. Insertion holes 51 are also formed at the four corners of the spacer 5. ing.
[0014]
Accordingly, the screw 3 such as a tapping screw is inserted through the insertion holes 22 formed at the four corners of the drainage case 2, and the bottom plate 12 of the marking device 1 is inserted through the insertion hole 41 of the film sheet 4 and the insertion hole 51 of the spacer 5. The film sheet 4 is fixed to the bottom plate 12 integrally with the drainage case 2 via the spacer 5 by being screwed into the mounting holes 12b formed in the above. In addition, in this fixed state, the valve part 42 of the film sheet 4 needs to be arrange | positioned in the position corresponding to the drain hole 12a.
[0015]
Next, the operation will be described with reference to FIG.
First, in the normal state, since the pressure in the marking device 1 and the external pressure are equal, the valve portion 42 in the film sheet 4 is in a horizontal state as shown in FIG. 3 (a) by the elastic force of the film sheet. And the drain hole 12a is opened. In this state, water accumulated inside due to condensation is discharged to the outside through the drain holes 12a and 21.
[0016]
In this state, when a strong wind blows and hits the surface of the signage device 1, particularly the display surface 13, or wind pressure is generated on the surface when the vehicle travels in the vehicle-mounted signage device 1, FIG. Since the surface plate of the marking device 1 is curved inward as shown in FIG. 2, the pressure in the marking device 1 becomes higher than the outside air and is discharged from the drain hole 12a.
[0017]
Since the valve portion 42 is displaced in a direction away from the drain hole 12a by the discharged air pressure, the drain holes 12a and 21 are formed even if a small amount of water is accumulated on the valve portion 42 in the film sheet 4 due to surface tension. It is discharged to the outside.
[0018]
The surface plate curved inside the labeling device 1 by the external pressure returns to the original state when the external pressure disappears. However, since the inside of the labeling device 1 suddenly becomes a negative pressure state at the time of the return, the valve portion 42 is The water is sucked to the lower surface side of the drain hole 12a and closes the drain hole 12a as shown in FIG.
[0019]
After the valve portion 42 closes the drain hole 12a, outside air gradually enters through the gap between the valve portion 42 and the bottom plate 12, and the valve portion 42 returns to the original horizontal state. Thus, even if the inside of the labeling device 1 suddenly becomes a negative pressure state, since the drain hole 12a is blocked by the valve portion 42, the outside air containing the antifreezing agent is sucked into the labeling device 1. It will not be.
[0020]
Therefore, although there is a possibility of corrosion only in the vicinity of the drain hole 12a, moisture containing salt is not diffused inside, and corrosion of the entire marking device 1 can be prevented. Therefore, it is possible to increase the durability by making only the bottom plate 12 portion of the marking device 1 corrosion resistant.
[0021]
In the present embodiment, the film sheet 4 is attached to the bottom plate 12 via the spacer 5, and the valve portion 42 is always separated from the drain hole 12a because of a small amount of moisture in the marking device 1. This is because the film sheet 4 is surely drained from the drain hole 12a without adhering to the bottom plate 12 due to the surface tension of water, so that water does not accumulate in the drain hole 12 and corrode.
[0022]
【The invention's effect】
As described above, in the present invention, the water drainage hole in the marking device is normally drained of water caused by condensation, and a valve that closes the drainage hole when the inside of the marking device is in a negative pressure state is attached. Thus, moisture containing the antifreezing agent does not enter the inside, and therefore corrosion due to rust can be prevented, and reliability and service life can be improved.
[0023]
In addition, since the valve is always opened from the drain hole, drainage is always performed even with a small amount of moisture, and therefore, the effect of preventing corrosion due to rust can be prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part of a marking device according to the present invention.
FIG. 2 is a cross-sectional view of the above assembled state.
FIG. 3 is an explanatory view showing the operation of the valve part in a state where the marker device is breathing, (a) shows a normal time, (b) shows a state in which the internal pressure is increased, and (c) Indicates a state in which the internal pressure has decreased.
FIG. 4 is a front view showing the entire marking device.
FIG. 5 is a cross-sectional view of a conventional drain hole portion.
FIGS. 6A and 6B show a display panel strain volume when the marker device breathes, in which FIG. 6A is a perspective view and FIG. 6B is a side view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Marking device 11 Lighting fixture 12 Bottom plate 12a Drain hole 4 Film sheet 42 Valve part 5 Spacer

Claims (2)

Inside fluorescent lamps, arranged luminaire bulb or the like and includes a display of fixed or subtitle type, internally illuminated and adapted to UchiTeru the display by the lighting fixture, or matrix of the light emitting element In the marking device arranged in a shape,
A marker apparatus comprising a flexible film sheet having a valve portion for closing a drain hole formed in a bottom plate of the marker apparatus. The sign apparatus according to claim 1, wherein the film sheet is attached via a spacer so that the valve portion forms a gap with respect to the drain hole.

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