JP2510970Y2 - Tank level warning device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention detects when the amount of liquid in a tank is less than a predetermined amount, and by this detection, for example, a warning light is turned on and displayed. The present invention relates to a remaining amount warning device that issues a quantity warning.

[Conventional technology]

Conventionally, there are various tank remaining amount warning devices,
The basic structure is as follows.

As shown in FIG. 7, a float type liquid amount detecting device (not shown) for detecting the liquid amount of the tank 1 is hung in the tank 1 and the float type liquid amount detecting device has a temperature negative characteristic. Remaining amount warning sensor 2 consisting of thermistor
To the bottom of tank 1. The remaining amount warning sensor 2 is connected to, for example, a power source 3 and a warning lamp 4 outside the tank 1.

Therefore, there is plenty of liquid 5 and the remaining amount warning sensor 2
The warning lamp 4 does not illuminate when the liquid is submerged below the liquid surface, but when the liquid amount decreases and the remaining amount warning sensor 2 is exposed, the temperature of the remaining amount warning sensor 2 itself is buried below the liquid surface. Rises more than when

Therefore, since the resistance value of the remaining amount warning sensor 2 including the thermistor having a negative temperature characteristic becomes small, current flows from the power supply 3 to the warning lamp 4 to turn on the warning lamp 4, and the liquid amount in the tank 1 becomes empty or It warns that the sky is very short.

[Problems to be solved by the device]

However, in the above-described conventional structure, for example, when the vehicle in which the tank 1 is provided tilts and the liquid 5 in the tank 1 is shifted to one side, or when the vehicle shakes and the liquid in the tank 1 undulates. If so, the remaining amount warning sensor 2
Is exposed to cause a malfunction in which the warning lamp 4 is erroneously turned on.

Therefore, there is a conventional one in which the remaining amount warning sensor 2 is connected to the warning lamp 4 through a delay circuit, but since the delay circuit can delay the operation for only a few seconds, the vehicle tilts and the remaining amount remains for a long time. The problem when the warning sensor 2 is exposed cannot be solved. A delay circuit that delays a long time of about several minutes may be used, but it is technically difficult to design the delay circuit, and the cost becomes very high, which is not practical.

Further, as shown in FIG. 8, the remaining amount warning sensor 2 is arranged, for example, close to the inner wall 1'of the tank 1, and a plurality of (two in the drawing) remaining amount warning sensors 2 are connected in series. This is also devised by the applicant, but since there are a plurality of remaining amount warning sensors 2 used, there is a drawback that the cost becomes higher.

Further, as shown in FIG. 9 and FIG. 10, there is also a wave shelter case body 8 in which the remaining amount warning sensor 2 is housed in a cylindrical case body 7 having a drainage hole 6 in the bottom portion. In order to prevent the malfunction due to the fact that the wave of the liquid surface caused by the shaking of the vehicle is stored in the case body 7 to prevent the malfunction, the problem when the vehicle leans for a long time cannot be solved.

The present invention provides a tank remaining amount warning device that solves such a problem.

[Means for solving the problem]

 The gist of the present invention will be described with reference to the accompanying drawings.

A remaining amount warning device for a tank, comprising a remaining amount warning sensor 2 for detecting that the liquid level in the tank 1 is lower than a predetermined height in the lower part of the tank 1.
Is stored in the storage case body 9, and an opening 14 is provided on the upper surface of the storage case body 9 and a drain pipe 10 having a small hole at the tip end is provided on the bottom side of the storage case body 9 in a protruding manner. Close to the inner wall 1'of the tank, the tip of the drain pipe 10 or the drain pipe 10
The present invention relates to a remaining amount warning device for a tank, which is characterized in that the projecting direction of the above is arranged toward the tank inner wall 1 '.

[Action]

For example, as shown in FIG. 2 showing the embodiment, when the storage case body 9 is arranged close to the left inner wall 1'of the tank, and when the tank 1 is inclined to the right side as shown in FIG.
Is exposed from the liquid 5, but since the drain 10 is tilted to the left, the liquid 5'in the storage case body 9 is not drained, and the remaining amount warning sensor 2 in the storage case body 9 is buried below the liquid surface. As it is, the remaining amount warning sensor 2 does not operate and malfunction is prevented.

Further, in this case, conversely, when the tank 1 is tilted to the left as shown in FIG. 4, the storage case body 9 has the tank left inner wall 1 '.
Since the remaining amount warning sensor 2 is buried under the liquid surface, no malfunction occurs because the remaining amount warning sensor 2 is disposed close to.

〔Example〕

 The structure of this embodiment will be described in detail with reference to FIG.

The storage case body 9 is provided with a resin tube 9a having a mounting piece 11 for mounting the remaining amount warning sensor 2 on the bottom and a contact piece 12 for contacting the remaining amount warning sensor 2 on the back side. Quantity warning sensor 2
Cord hole for inserting the cord 13 to connect to the warning light and power supply of
14 and a lid plate 9b made of resin formed as an opening 14 on the upper surface.

In this embodiment, the drain pipe is directed to the bottom of the tubular body 9a toward the side.
10 is designed to have a predetermined length and integrally molded with resin.

Further, the remaining amount warning sensor 2 composed of a thermistor having a negative temperature characteristic is housed inside the storage case body 9 in a state of being narrowed and fixed by the mounting piece 11 and the contact piece 12.

Then, the storage case body 9 in which the remaining amount warning sensor 2 is installed
Is arranged in the lower part of the tank 1 close to the inner wall 1 ′ of the tank.

Next, a detailed description will be given of the operation when the storage case body 9 is arranged close to the left inner wall 1'of the tank 1 as shown in FIGS.

As shown in FIG. 2, in a normal state in which the tank 1 is not tilted, if the liquid level in the tank 1 supplies fuel liquid to the engine one after another in a fuel tank, the fuel liquid in the storage case body 9 The liquid is discharged so as to be flush with the liquid surface in the tank 1, and the liquid surface is lowered.

Therefore, when the liquid level in the tank 1 falls below the height of the remaining amount warning sensor 2, the liquid level in the storage case body 9 also falls and the remaining amount warning sensor 2 is exposed, and the resistance value of the thermistor of the remaining amount warning sensor 2 is increased. It will be lowered and the remaining amount warning will be issued reliably as before.

However, as shown in FIG. 3, the vehicle leans and the tank 1
When is tilted to the right, the storage case body 9 is exposed from the liquid 5, but the drain 10 is tilted upward to the left, so that the liquid 5'in the storage case body 9 is not drained and the storage case body 9 Since the remaining amount warning sensor 2 remains buried under the liquid surface, the remaining amount warning sensor 2 does not operate and malfunction is prevented.

In this case, on the contrary, when the tank 1 is tilted to the left as shown in FIG. 4, the storage case body 9 is disposed close to the inner wall 1'of the left side of the tank. No malfunction occurs as it is buried underneath.

Therefore, in the present embodiment, at least the malfunction operation due to the tank 1 leaning or swaying and the tank 1 leaning in the left-right direction is reliably prevented by the one remaining amount warning sensor 2.

Further, in order to surely prevent the malfunction even with respect to the inclination in the front-rear direction, the present apparatus may be disposed closer to the one tank rear side or the front inner wall 1 ', as shown in FIG.

Further, as shown in FIG. 6, the discharge cylinder 10 is directed to the corner of the tank 1 so that the same effect as in FIG. 5 can be obtained with one remaining amount warning sensor 2. Things are also possible.

The present invention is not limited to the above-described embodiment, but the shape of the storage case body 9 and the structural attachment means of the remaining amount warning sensor 2 can be designed appropriately, and the protruding position of the drain pipe 10 can be changed. The length and the length can be designed appropriately.

The storage case body 9 may be disposed in the tank 1 at a peripheral portion in the tilt direction in which it is desired to prevent an erroneous operation in consideration of the remaining amount warning sensor 2 having a predetermined height.

[Effect of device]

Since the present invention is configured as described above, even when the vehicle is tilted for a long time, it is reliably prevented that the remaining amount warning sensor is exposed and the remaining amount is erroneously warned.
Even if the tank shakes temporarily due to the shaking of the vehicle, the remaining amount warning sensor is stored in the storage case body, and this storage case body has only the opening on the upper surface and the tip of the drain pipe. Since it can be designed, the tank liquid is not discharged more than necessary from the storage case body, and the tank remaining amount warning device is extremely useful because it does not malfunction easily.

That is, when applied to a fuel tank of a vehicle, for example, even if the vehicle is tilted for a long time and the tank is tilted, malfunction does not occur, and even if the vehicle shakes in this tilted state and the liquid level of the tank greatly shakes, Since the tank liquid is unlikely to spill from the storage case body as described above, there are few malfunctions due to this shaking, and it becomes an extremely practical tank remaining amount warning device as a fuel tank for vehicles that often shakes in a tilted state. .

In addition, the present invention has an extremely simple structure, so that it is possible to provide a low cost and inexpensive product, and it is also extremely easy to install in the tank. Become.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of this embodiment is cut away, and FIGS.
FIG. 6 is an explanatory view of the present embodiment in use, FIG. 2 is a front view in a normal state, FIG. 3 is a front view when tilted to the right side, and FIG. 4 is a front view when tilted to the left side. A front view, FIG. 5 is a plan view when the present apparatus is arranged in two bodies, and FIG. 6 is a plan view when the present apparatus is arranged in one corner. FIGS. 7 to 10 show a conventional example. FIG. 7 is an explanatory diagram of the basic configuration of the conventional example, FIG. 8 is an explanatory diagram of a configuration in which two thermistors are arranged on the left and right, and FIG. 9 is Explanatory drawing of the configuration stored in the surf case,
FIG. 10 is a perspective view in which a part of the wave shelter case of FIG. 9 is cut away. 1 ... Tank, 1 '... Tank inner wall, 2 ... Remaining amount warning sensor, 9 ... Storage case body, 10 ... Drainage tube, 14 ... Opening part.

Claims (1)

(57) [Scope of utility model registration request] 1. A remaining amount warning device for a tank, wherein a remaining amount warning sensor for detecting that the liquid level in the tank is lower than a predetermined height is provided below the inside of the tank. It is housed in a body and an opening is provided in the upper surface of the storage case body, and a drain pipe having a small hole at the tip end is provided on the bottom side, and the storage case body is brought close to the inner wall of the tank. A remaining amount warning device for a tank, characterized in that the tip of the tank or the direction of the projection of the drain tube is arranged toward the inner wall of the tank.