JP2003185127A - Level gauge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the visibility of a level gauge for checking the presence or absence of liquid in a tank. <P>SOLUTION: The level gauge 3 is fitted to an opening 2 provided in the side wall 1a of the tank 1, a window 3b formed of a transparent body allowing direct view of liquid is provided in the frame body 3a of the level gauge 3, and a view plate 4 allowing light from the window 3b into the tank 1 to strike thereon is installed in the window 3b on the tank 1 inner side. When the view plate 4 is lightly illuminated by the light from the window 3b, light with hue of color from the brightened view plate 4 is returned to the window 3b. A large number of fine translucent grain bodies 5 are disposed on the surface of the view plate 4, and light from the view plate 4 sideways or upward is reflected on the inside of the translucent grain bodies 5 and directed toward the forward window 3b. Thus the amount of the light returning to the window 3b can be increased. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid level gauge device that can be used as an oil level meter suitable for a cartridge tank used in an oil combustor or the like.

[0002]

2. Description of the Related Art A cartridge tank of an oil combustor is provided with a cap with an opening / closing valve attached to the inlet. Oil, which is fuel, is injected from the inlet with the cap removed, and the inlet is closed after the cap is closed. Is used by mounting it on the oil combustor with the oil in the tank supplied to the oil combustor instead of the air flowing into the tank through the on-off valve. Is used.

In such a refueling system, since the inside of the tank is always under a negative pressure during use with the cap of the tank facing downward, a general level gauge using a float mechanism cannot be used and is used. An opening is made in the side wall near the injection port that is in the lower part, and a liquid level gauge with a window through which the liquid can be directly viewed is attached to this opening, and the liquid level gauge seals the opening to withstand the negative pressure of the tank. ing.

In such a liquid level gauge that directly looks at the liquid level, it is more difficult to visually recognize the liquid as the liquid becomes more transparent. Therefore, in many liquid level meters, a colored visual identification plate is provided in the tank inside the window. When there is no liquid, the light from the window is scattered until it reaches the viewing plate, making it difficult to see the color of the viewing plate.When there is liquid, the light does not scatter and reaches the viewing plate and is bright. Therefore, there is known a structure in which the color of the viewing plate can be clearly seen.

Further, as a window structure, an inclined surface is provided in a portion in contact with the liquid surface, and light entering from the outside is reflected by the inclined surface when there is no liquid, and when there is liquid, it is not reflected by the inclined surface and remains in the tank. Go straight to. In this way, it is also practiced to change the direction of the light hit in the tank and arrange the visual recognition plate in at least one of the light hit directions.

[0006]

As described above, by providing the visual check plate, the presence or absence of the liquid such as transparent kerosene can be easily understood, but the visual check plate enters from the outside of the tank through the window. Since it is visible by light, it is difficult to see when the position of the liquid level gauge is in the back of the frame or below the frame, and there is a problem in ease of confirmation.

For this reason, there is a petroleum combustor near the liquid level gauge with a lamp attached to the frame. Even if this structure is effective for confirming the presence or absence of liquid during use of the petroleum combustor, The confirmation of the full display when injecting the liquid has not been improved, and there is room for improvement. In addition, there are some that are colored with fluorescent paint or phosphorescent paint to make it easy to see when coloring the visual plate, but such paint is durable due to fading in oil such as oil burner However, it is difficult to see due to long-term use, and does not completely solve the above problems.

[0008]

The present invention is to solve the above-mentioned problems, and a liquid level gauge 3 is attached in close contact with an opening 2 provided in a side wall 1a of a tank 1, and a frame body of the liquid level gauge 3 is attached. 3a is provided with a window 3b formed of a transparent body through which the liquid can be directly seen, and a visual level plate 4 is provided on the inside of the tank 1 of the window 3b, the visual plate 4 being illuminated by light traveling from the window 3b into the tank 1. A large number of fine transparent particles 5 are arranged on the surface of the visual recognition plate 4.

Further, an inclined surface 3c is formed on the inside of the tank 1 of the window 3b formed of the transparent body, and the light traveling from the window 3b into the tank 1 is reflected by the inclined surface 3c and is reflected by the window 3b. While reaching the other surface on the inner side of the tank 1, the tank 1
Since the surface of the viewing plate 4 on which a large number of fine transparent particles 5 are arranged is closely located on the other surface on the inner side, the viewing plate 4 mounted close to the window 3b looks bright. Became.

Further, a transparent adhesive layer 4a is formed on the surface of the visual check plate 4 having an arbitrary color tone, and the fine light-transmitting particles 5 have a part of the visual check plate in the adhesive layer 4a. Since the light reaches the surface of No. 4 and is partially exposed from the adhesive layer 4a, most of the light having the color tone from the brightened viewing plate 4 goes out of the tank 1 through the window 3b.

Further, since the surface of the visual recognition plate 4 having a large number of fine light-transmitting particles 5 arranged on the surface thereof has a white color tone, the light and dark are clearly visible when confirming the presence or absence of the liquid.

An inclined surface 3c is formed on the inside of the tank 1 of the window 3b formed of the transparent body, and the inclined surface 3 is formed.
A second visual check plate 6 having a color tone different from that of the visual check plate 4 is provided inside the tank 1 with a distance from c, and when there is liquid in the tank 1, the light traveling from the window 3b into the tank 1 is inclined. Surface 3
Since it is configured to pass through c and hit the second visual check plate 6, the color of the window 3b changes depending on the presence or absence of the liquid, and the visual check plate 4 becomes easy to see.

The window 3b provided in the frame 3a of the liquid level gauge 3 is formed in a long and thin shape having a long vertical direction, and the window 3
In b, the depth dimension of the central portion is made shorter than the depth dimension of the left and right side portions to form two vertically inclined surfaces 3c.
The visual check plate 4 and the second visual check plate 6 are vertically formed to have a long U-shaped cross section, and the central portion constitutes the second visual check plate 6 and both side portions constitute the visual check plate 4, and both side portions constituting the visual check plate 4 Since the window 3b is close to the side surface of the portion having a long depth dimension, the visual confirmation plate 4 having the translucent particles 5 is easy to see, and is easy to manufacture even when the second visual confirmation plate 6 is used.

[0014]

In the liquid level gauge 3 of this kind of tank 1, the window 3b
Light traveling from the inside of the tank 1 to the inside of the tank 1 is directly transmitted into the tank 1 when the inner surface of the window 3b is in contact with the liquid, and when there is no liquid, the light entering from the window 3b is not directly transmitted into the tank 1. In addition, since a part of the light is reflected by the inner wall surface of the window 3b and a part of the light is transmitted, the light going into the tank 1 becomes weak.

Further, even when light having a color tone emitted from the illuminated and brightened viewing plate 4 travels toward the window 3b, it passes through the window 3b as it is when there is liquid, but on the wall surface of the window 3b when there is no liquid. Since part of the liquid is reflected and part of the light is transmitted, the brightness of the window 3b changes depending on the presence / absence of the liquid in the tank 1, and the presence / absence of the liquid can be confirmed by the brightness.

When the inner surface of the window 3b has an inclined surface 3c, when there is no liquid in the tank 1, the light entering from the window 3 is reflected by the inclined surface 3c and directed to the side, and the tank 1
When there is a liquid in the liquid, the light that has entered through the window 3b goes straight into the tank 1 as it is, and by providing the visual check plate 4 at least on one side of the direction in which the light travels, the presence or absence of liquid by the bright visual check plate 4 Can be confirmed.

According to the present invention, a large number of fine transparent particles 5 are arranged on the surface of the visual check plate 4 so that the color tone of the visual check plate 4 looks bright. In general, the brightly illuminated viewing plate 4 emits light that allows the human eye to see a specified color tone (actually, some of the wavelengths of the illuminated wavelength are reflected). Therefore, this light is emitted at an angle of 180 degrees on the front surface of the viewing plate 4.
Therefore, most of the light from the visual check plate 4 does not go to the front window 3b but goes to the inside of the tank 1 on the side, and even when the visual check plate 4 is brought close to the window 3b, it enters the window 3b at a shallow angle. The traveling light is reflected by the wall surface of the window 3b and travels into the tank 1.

The light traveling from the window 3b to the viewing plate 4 is the viewing plate 4.
Even if there are fine translucent particles 5 on the surface, the amount of light reaching the viewing plate 4 does not change. On the other hand, the light traveling from the viewing plate 4 to the window 3b enters the adjacent fine translucent particles 5, and the light traveling to the side is reflected in the translucent particles 5 and directed to the front window 3b. Therefore, by arranging the translucent particles 5 on the surface of the visual check plate 4, the amount of light traveling from the visual check plate 4 to the window 3b is remarkably increased. The color tone of the material of No. 4 and the color tone of the paint applied to the visual check plate 4 can be confirmed bright.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure will be described with reference to the drawings showing an embodiment. 1 is a cartridge type tank for refueling an oil combustor and storing fuel in a frame, 7 is an inlet of the tank 1, and 8 is an inlet 7. The cap 9 is an opening / closing valve attached to the cap 8. The cap 8 is removed and the inlet 7 is opened to supply liquid fuel such as oil into the tank 1. Also,
The tank 1 which is full is to be installed on the oil combustor by closing the cap 8 and then tipping the inlet 7 downward, and when the oil combustor burns and oil is used,
Air enters the tank 1 via the on-off valve 9, and instead the oil in the tank 1 is supplied to the oil combustor.

In the cartridge type tank 1 described above, the float type liquid level gauge cannot be used since the inside of the tank 1 is always under negative pressure during use with the cap 8 facing downward. Reference numeral 2 is an opening provided in the side wall 1a near the inlet 7 of the tank 1, and 3 is a liquid level gauge closely attached to the opening 2. 3a is a frame that constitutes the liquid level gauge 3, 3b is a window formed of a transparent body provided in the frame 3a, 3d is packing that is interposed between the frame 3a, the window 3b and the opening 2, and 3e is packing. 3d is a screw for closely attaching the frame 3a to the opening 2 of the tank 1 via 3d.

As described above, since the liquid level gauge 3 of this type is in close contact with the opening 2 of the tank 1, the negative pressure of the tank 1 when it falls is overwhelmed, and the window 3b of the liquid level gauge 3 is closed. The presence or absence of liquid can be confirmed by directly looking at the oil in the tank 1. However, the liquid level gauge 3 which directly looks at such a liquid level has a problem in that it becomes more difficult to visually recognize the liquid as the liquid is more transparent.

That is, when there is a transparent liquid inside the window 3b, the light traveling from the window 3b into the tank 1 proceeds through the transparent liquid in the tank 1 as it is, and the inside of the tank 1 looks dark, while the window 3b. Tank 1 when there is no liquid inside
A part of the light traveling inward is scattered on the inner wall surface of the window 3b and looks a little bright, and the presence or absence of the liquid is confirmed by the difference in light and shade, which makes the visibility difficult.

Reference numeral 4 is located in the tank 1 and is a window 3 of the liquid level gauge 3.
It is a colored visual check plate provided in the inside of b, and since the light directed to the inside of the tank 1 illuminates the visual check plate 4, the visual check plate 4
The color can be seen from the outside of the tank 1, and the visibility is improved even if the liquid is transparent by appropriately selecting the distance dimension between the window 3b and the viewing plate 4.

3c is a window 3b of the liquid level gauge 3 formed of a transparent body.
Is a slanted part formed on the inner wall surface of the tank 1, and when there is no liquid in the tank 1, the light entering through the window 3 is slanted surface 3c.
When the liquid is in the tank 1, the light entering through the window 3b goes straight into the tank 1 as it is. Therefore, the direction of the light that travels when there is liquid or when there is no liquid is different. Therefore, if the visual check plate 4 is arranged in front of the light, the color of the visual check plate 4 can be confirmed from the outside of the tank 1. The existence of liquid can be confirmed.

Specifically, when the visual check plate 4 is arranged in front of the light reflected by the inclined surface 3c and directed to the side, the distance between the window 3b and the visual check plate 4 is made close, and the light is not reflected by the inclined surface 3c. When the visual check plate 4 is arranged in front of the light that goes into the tank 1, the presence of the liquid can be confirmed by the color of the visual check plate 4 by widening the interval dimension.

By the way, the liquid level gauge 3 is often arranged below the frame of the petroleum combustor, and when refueling the tank 1, it may be performed in a dark place. The fact that the visual check plate 4 is visible from the outside of the tank 1 means that there is light directed from the visual check plate 4 to the human eye, and is related to the large amount of this light. Since this light has a large amount of light directed to a person if the viewing plate 4 is bright, as a device to illuminate the viewing plate 4 brightly, a lamp is conventionally installed in an oil combustor to which the tank 1 is attached and the light is viewed from the window 3b. Although a structure is implemented in which the amount of light directed to the plate 4 is increased or the window 3b is enlarged so that the light easily reaches the visual plate 4, there is a limit to the amount of light taken into the visual plate 4.

In the present invention, since it is difficult to increase the amount of light that illuminates the visual check plate 4, the amount of light returning from the visual check plate 4 to the human eye is increased and the visual check plate 4 arranged inside the window 3b. To obtain a liquid level gauge that makes it easy to confirm the presence or absence of liquid. Reference numeral 5 is a fine translucent particle arranged on the surface of the visual check plate 4, and the translucent particle 5 is slightly angled. Although it may have tension, it is preferable that it is spherical and that the particle size is fine. And, even if such a minute transparent particle 5 is present on the visual check plate 4, the amount of light reaching the visual check plate 4 from the window does not change.

From the brightly illuminated viewing plate 4, the light of which a specified color tone can be seen by the human eye is emitted (actually, some of the wavelengths of the illuminated wavelength are light). Is reflected, and when there is no fine light-transmitting granular material 5,
This light is emitted at an angle of 180 degrees on the front surface of the viewing plate 4, and most of the light goes to the tank 1 on the side without going to the window 3b in the front. Further, even in the structure in which the viewing plate 4 is attached close to the window 3b, the light traveling toward the window 3b at a shallow angle is not reflected by the window 3b.
The amount of light that is reflected by the wall surface of (1) and goes into the tank 1 and goes out of the tank 1 through the window 3b is reduced.

On the other hand, when a large number of fine transparent particles 5 of the present invention are arranged so as to cover the surface of the visual check plate 5,
As shown in FIG. 6, the light X going from the viewing plate 4 to the side enters the adjacent fine light-transmissive particles 5, and this light is reflected in the light-transmissive particles 5 and transmitted. When the light particles 5 exit, the light travels in the forward direction toward the window 3b, and the light Y that is going upward from the visual check plate 4 is also directly fine.
When the light enters and exits the translucent particle body 5, it goes toward the front window 3b.

Therefore, by the function of the translucent particles 5,
In the present invention, the light that was conventionally directed to the inside of the tank 1 is now directed to the window 3b, so that the entire viewing plate 4 causes the window 3b.
It is possible to significantly increase the amount of light that goes toward, and even when the amount of light that illuminates the visual check plate 4 is small, the color tone of the material of the visual check plate 4 and the color tone of the paint applied to the visual check plate 4 become brighter, It became easier to confirm the presence or absence of the liquid in the tank 1.

At this time, if the translucent particles 5 are sparsely arranged, the amount of light can be varied between the part where the translucent particles 5 are present and the part where the translucent particles 5 are not present, so that the color tone of the visual recognition plate 4 is bright. You can also make it look shining.

In the embodiment of FIG. 1 which is a concrete structure of the liquid level gauge using the visual recognition plate 4, the liquid level gauge without the inclined surface 3c in the window 3b is shown. Generally, a window 3b provided on the frame of the liquid level gauge 3
Has a slender shape that is long in the up-down direction, so that even if the liquid level gauge 3 is mounted at a low position, it can be seen well from the position of the eyes of the person diagonally above. Window 3b of the embodiment of FIG.
In this structure, the inner side of the tank 1 is a flat surface, and when there is no liquid in the tank 1, light is scattered on this flat surface, and the amount of light reaching the visual recognition plate 4 spaced apart from the flat surface is reduced. Further, when there is a liquid in the tank 1, there is almost no scattering of light on this plane and the light reaches the viewing plate 4 and illuminates it brightly.
By increasing the amount of light returning to the window 3b, the color tone of the visual check plate 4 becomes brighter.

Further, in the embodiment having the inclined surface 3c on the inner surface side of the tank 1 of the window 3b, two inclined surfaces 3c are arranged in V shape in FIGS. 2 and 3, and 3f is the apex of this V shape. Is a slit formed toward the inner surface of the material of the window 3b, and the visual recognition plate 4 having a large number of fine light-transparent particles 5 arranged on both front and back surfaces is inserted into the slit 3f.

In the embodiment of FIG. 2, when the liquid is in the tank 1, the light traveling from the window 3b into the tank 1 enters the tank 1 as it is without being reflected by the inclined surface 3c and the window 3b.
The light does not return from and becomes dark. When the liquid is not in the tank 1, the light traveling from the window 3b into the tank 1 is reflected by the inclined surface 3c and brightly illuminates the visual check plate 4 toward the visual check plate 4 in the slit 3f. Since a large number of fine transparent particles 5 are arranged on the visual check plate 4, the amount of light returning from the visual check plate 5 increases, and the color tone of the visual check plate 4 is bright in the window 3b of the liquid level indicator 3. You can see it. In this structure, since the visual check plate 4 and the window 3b can be arranged close to each other, the amount of light reaching the human eye from the visual check plate 4 is significantly larger than that when the visual check plate 4 is arranged with a large interval, It becomes easier to confirm the presence or absence of liquid.

In the embodiment in which the two inclined surfaces 3c shown in FIG. 3 are arranged in a V shape and the slit 3f is provided, 6 is a window 3b.
The second visual check plate 6 has a color tone different from that of the visual check plate 4. In the embodiment shown in FIG. 2, when the liquid is in the tank 1, the light traveling from the window 3b into the tank 1 is not reflected by the inclined surface 3c but enters the tank 1 as it is, and the light does not return from the window 3b and is in a dark state. However, in the embodiment of FIG. 3, the light entering the tank 1 can illuminate the second visual check plate 6.

Therefore, the window 3b of the liquid level gauge 3 will appear to have a color tone of the second visual check plate 6 different from that of the visual check plate 4 when liquid is present. Since the color of the window 3b of the liquid level gauge 3 is different depending on whether or not it exists,
By making the visual plate 4 and the second visual plate 6 different in color tone, it becomes easier to confirm the presence or absence of the liquid.

In the embodiment shown in FIG. 4, the arrangement of the inclined surface is shown in FIG.
This is an embodiment different from FIG. 3, and the window 3b is formed in an M shape by making the depth dimension of the central portion shorter than the depth dimension of the left and right side portions and providing two vertically inclined surfaces 3c extending in the vertical direction. is doing. On the other hand, as shown in FIG. 7, reference numeral 10 denotes a viewing plate frame body having a vertically long U-shaped cross section, and the side surface portion of the viewing plate frame 4 approaches the side surface of the window 3b having a long depth dimension to form the viewing plate 4. The central portion constitutes the second visual check plate 6. Reference numeral 10a is a visual piece that is formed by bending the upper and lower ends of the central portion of the second visual check plate 6 forward and forms a part of the second visual check plate 6, and 10b is formed by bending the tip of the side surface portion outward. The fixing piece 10b is a fixing piece so that the visual recognition plate frame 10 can be attached together when the window 3b is attached to the packing 3d.

In the liquid level gauge of FIG. 4, when the light traveling from the window 3b into the tank 1 enters the tank 1 as it is without being reflected by the inclined surface 3c when the liquid is present, the second visual check plate 6 is illuminated. It can be seen that the liquid is present when the window 3b has the color tone of the second visual check plate 6. At this time, when the position of the human eye is high, the light also comes back from the visual check piece 10a of the second visual check plate 6, so that the entire window 3b has the color tone of the second visual check plate 6 even when looking through from above. Further, when there is no liquid, the light is reflected by the inclined surface 3c, passes through the wall surface of the side window 3b, and illuminates the visual recognition plate 4 approaching. 5, the amount of light returning to the window 3b is increased, and the window 3b becomes a bright color tone of the viewing plate 4.

In the structure of this embodiment, since the visual check plate 4 and the second visual check plate 6 are integrally formed by the visual check plate frame 10, the manufacturing is simplified even when the second visual check plate 6 is used. That is, the flat plate-shaped visual check plate frame body 10 is made to have a different color tone by a paint, the color tone of the second visual check plate 6 is applied to the center, and the color tone of the visual check plate 4 is applied to the side portion. A large number of fine translucent particles 5 are arranged in the area where the light transmissive particles 5 are adhered, and if bending is then performed while avoiding the part to which the translucent particles 5 are adhered, there is no crack in the coating film The body 10 can be manufactured.

In the visual check plate frame 10 thus manufactured, it is not necessary to separately attach the visual check plate 4 and the second visual check plate, and when the fixing piece 10b is provided as in the embodiment, the window 3b is packed 3d. The fixing piece 10b of the visual check plate frame body 10 can be fixed together when it is attached to, and the manufacture of the liquid level gauge becomes easy.

The fine light-transmitting particles 5 arranged in large numbers on the visual check plate 4 are made of a glass material, and the finer the particle size, the brighter it becomes. Therefore, in order to make it noticeably brighter than the conventional product, it is 200 μm or less. Is preferred. In FIG. 6, 4b is a coating film having an arbitrary color tone applied to the surface of the viewing plate 4, 4a is an adhesive layer formed on the coating film 4b, and the fine light-transparent particles 5 are on the viewing plate 4 side. The surface of the adhesive layer 4a reaches the surface of the coating film 4b, and the thickness of the adhesive layer 4a is preferably less than half the size of the translucent particles 5. By doing so, the translucent particles 5 can be visually recognized. A state in which the plate 4 is attached to the surface of the plate 4 can be created, and durability is obtained without peeling off the translucent particles 5 even after long-term use.

When the particle diameter of the transparent particles 5 is small, the transparent particles 5 can be attached to the surface on which the adhesive layer 4b is formed by printing by the silk printing method, and the printing technique is used. This simplifies the work process and enables mass production.

On the other hand, when confirming the presence or absence of the liquid in the tank 1 through the window 3b of the liquid level gauge 3, the fine light-transmitting particles 5 clearly show the difference from the other states and the presence of the visual check plate 4 is confirmed. For this purpose, the visual plate 4 preferably has a white color tone for this purpose, and when combined with the translucent particles 5, even if the surrounding atmosphere is slightly dark, the presence or absence of liquid inside the tank 1 is very high. You can now see clearly.

Further, when a bright color can be applied to the visual check plate 4, such as when the visual check plate 4 having a white color tone is used, a large number of different color tones are applied to the surface of the coating film of the second visual check plate 6. Fine translucent particles 5 may be arranged. In this case, the presence or absence of the liquid in the tank 1 can be confirmed by the difference in the color of the bright color.

Although the liquid level gauge of the present invention is explained by the oil level meter of the cartridge tank of the oil combustor, it is not limited to the tank used for the oil combustor.
Instead of a tank that has an opening / closing valve installed at the inlet and is used by inverting it, such as a liquid level gauge for a water tank such as a humidifier, or a liquid level gauge that uses a float that is mounted on the top of a general tank. It can be used by attaching it to the side wall.

[0046]

As described above, in the present invention, the visual check plate 4 is provided inside the tank 1 of the window 3b constituting the liquid level gauge 3, and a large number of fine light-transparent particles 5 are provided on the surface 3b of the visual check plate 4. Since it is arranged, most of the light that illuminates the visual check plate 4 goes to the window 3b without going into the tank 1, and the window 3b of the liquid level gauge 3 seen from the outside of the tank 1 becomes a bright color, This makes it easier to check the presence or absence of liquid. In particular, since the color tone of the visual check plate 4 can be surely confirmed even if the circumference of the tank 1 is slightly dark, the range of application of the tank 1 using the liquid level gauge 3 is widened and the usability is greatly improved. is there.

Further, when the inclined surface 3c is provided on the inner surface side of the tank 1 of the transparent window 3b, the light reflected by the inclined surface 3c and the light transmitted through the inclined surface 3c can be separated, so that the inclined surface 3c. By arranging the surface of the viewing plate 4 having the translucent particles 5 close to the surface of the window 3b where the reflected light reaches, most of the light comes back into the transparent window 3b. Board 4
The color tone is lighter than that when is away from the window 3b, and it is easier to confirm the presence or absence of liquid.

The transparent particles 5 are formed by forming an adhesive layer 4a on the visual recognition plate 4, and the transparent particles 5 are adhered by the adhesive layer 4a. Reaching the viewing board 4,
Since the other part is exposed on the surface without being buried in the adhesive layer 4a, the transparent particles 5 can be reliably attached while maintaining the brightness of the transparent particles 5, which enables long-term use. became.

Further, since the function of the light-transmitting particles 5 arranged on the visual check plate 4 is to lighten the visual check plate 4, if a bright white color tone is selected when the color tone of the visual check plate 4 is selected, Furthermore, it becomes easy to confirm the presence or absence of liquid.

On the other hand, in the window 3b having the inclined surface 3c, the second visual check plate 6 having a different color tone from the window 3b is provided to the visual check plate 4 to which a large number of translucent particles 5 are attached. Since the presence / absence of the liquid inside the tank 1 can be recognized as a difference in color, it is easier to confirm the liquid than to confirm the presence / absence of the liquid by light and dark.

Further, when the liquid level gauge 3 is manufactured, the visual check plate 4 is used.
And the second viewing plate 6 are not separately attached, but the window 3b
Forms a two inclined surfaces 3c by shortening the central depth dimension, and the side of the window 3b faces the surface of the viewing plate 4 on which the translucent particles 5 are arranged. If the two visual check plates 4 and 6 are formed with a second visual check plate 6 at the center and a side visual check plate 4 at the center of a member formed in a U-shaped cross section, the visual check plate 4 is illuminated when there is no liquid and liquid is present. At some point, the second visual check plate 6 is illuminated, and it becomes easier to confirm the presence or absence of liquid by the difference in color. Also,
With this structure, the two viewing plates 4 and 6 can be attached at one time, which is extremely easy to manufacture.

[Brief description of drawings]

FIG. 1 is a sectional view of a liquid level gauge showing an embodiment of the present invention.

FIG. 2 is a sectional view of a liquid level gauge showing another embodiment of the present invention.

FIG. 3 is a sectional view of a liquid level gauge showing another embodiment of the present invention.

FIG. 4 is a sectional view of a liquid level gauge showing another embodiment of the present invention.

FIG. 5 is a sectional view of a tank embodying the present invention.

FIG. 6 is an enlarged cross-sectional view of a main part of a visual recognition plate that is a component of the present invention.

FIG. 7 is a perspective view of a component of this invention.

[Explanation of symbols]

1 tank 1a Side wall of tank 2 openings 3 Level gauge 3a frame 3b window 3c slope 4 Visual plate 4a adhesive layer 5 Translucent particles 6 Second visual plate

Claims (6)

[Claims] 1. A liquid level gauge 3 is attached in close contact with an opening 2 provided in a side wall 1a of a tank 1, and a frame 3a of the liquid level gauge 3 is provided with a window 3b formed of a transparent body through which a liquid can be directly viewed. In the liquid level gauge provided on the inner side of the window 3b inside the tank 1 with a visual check plate 4 to which the light traveling from the window 3b toward the inside of the tank 1 is applied, a fine light-transparent particle 5 is provided on the surface of the visual check plate 4. A liquid level measuring device characterized in that a large number are arranged. 2. A tank 1 having a window 3b formed of the transparent body.
An inclined surface 3c is formed on the inner side, and the light traveling from the window 3b into the tank 1 is reflected by the inclined surface 3c and is reflected by the window 3b.
In addition to reaching the other surface on the inner side of the tank 1, the surface on which a large number of fine light-transparent particles 5 of the visual identification plate 4 are arranged is located close to the other surface on the inner side of the tank 1. The liquid level gauge device according to claim 1. 3. A transparent adhesive layer 4a is formed on the surface of a visual check plate 4 having an arbitrary color tone, and the fine light-transmitting particles 5 are partially covered with the visual check plate 4a. 4. The liquid level gauge device according to claim 1 or 2, wherein the liquid level gauge reaches the surface of No. 4 and is partially exposed from the adhesive layer 4a. 4. The liquid level gauge according to claim 1, wherein the surface of the visual recognition plate 4 having a large number of fine translucent particles 5 arranged on the surface has a white color tone. apparatus. 5. A tank 1 having a window 3b formed of the transparent body.
An inclined surface 3c is formed on the inner side, and a second visual check plate 6 having a color tone different from that of the visual check plate 4 is provided inside the tank 1 with a space between the inclined surface 3c and the liquid. 5. The liquid level gauge device according to any one of claims 2 to 4, wherein when there is, light traveling from the window 3b into the tank 1 passes through the inclined surface 3c and strikes the second visual check plate 6. 6. A window 3b provided in a frame 3a of the liquid level gauge 3.
Is a long and slender shape with a long vertical direction, and the window 3b has two vertical inclined surfaces 3c that are shorter in the central portion than in the left and right side portions. 4 and the second visual check plate 6 are formed in a vertically long U-shaped cross-section, the central portion thereof constitutes the second visual check plate 6 and both side portions thereof constitute the visual check plate 4, and both side portions constituting the visual check plate 4 are windows 3b. The liquid level gauge device according to claim 5, wherein the depth dimension of the liquid level gauge is close to the side surface of the long portion.