JPS6215804B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in an instrument box used to house a meter such as a watt-hour meter and protect it from rain, snow, sunlight, etc. when the meter is installed outdoors. .

A conventional instrument box of this type consists of a base 1 and a cover 2 made of synthetic resin, as shown in Fig. 1 A and B.
The cover 2 is provided with a reading window 21 fitted with a transparent material such as glass or acrylic resin at a portion corresponding to the indicator 31 of the instrument 3 housed therein so that the indicated value can be read from the outside.

When the meter 3 is installed outdoors using the above-mentioned conventional meter box, water droplets adhere to the inner surface of the reading window 21 during meter reading (when reading the indicated value of the meter) and become cloudy like ground glass, making it difficult to read the indicated value. Trouble often arose because they were unable to do so. The reason for water droplets adhering to the inner surface of the reading window 21 is that since the reading window 21 is transparent, its heat ray absorption rate is lower than that of other parts of the cover 2, and its heat dissipation rate is high.For example, when exposed to direct sunlight, This is because the temperature is less likely to rise than other parts and the temperature is lower than other parts. That is, as the temperature of the cover 2 rises due to sunlight irradiation, the air inside the cover 2 that is in contact with the inner surface of the cover 2 is warmed and flows through the inner surface of the cover 2 as shown by the arrow in FIG. However, a warm air current is generated that gradually warms up and rises.

This is because this warm air current comes into contact with the reading window 21 whose temperature is lower than the surroundings and is rapidly cooled down, so that water vapor in the warm air current condenses on the inner surface of the reading window 21.

This invention provides a reading window 2 in the conventional instrument box.
Focusing on the mechanism of clouding described in No. 1, the present invention provides a new instrument box that prevents clouding due to water droplets adhering to the reading window 21 by making it difficult for warm air to directly touch the reading window 21. .

An embodiment of the present invention will be described below with reference to FIGS. 2A and 2B. 1 is the base on which instrument 3 is installed;
2 is a cover, which is combined with the base 1 and covers the instrument 3;
is stored in a nearly airtight state. The cover 2 is provided with a reading window 21 covered with a transparent material, such as transparent glass or transparent acrylic resin, facing the front surface 32 of the meter 3 so that the indicated value of the indicator 31 of the stored meter 3 can be read from the outside. , further located below the space 4 facing the front surface 32 of the meter 3 and the reading window 21,
Furthermore, a partition rib 22 is provided whose tip end overlaps with the lower surface 33 of the meter 3 and is formed to partition the entire inner surface of the cover 2 into upper and lower parts.

Since the instrument box of this invention is constructed as described above,
As described above, even if warm air flows upward while passing through the inner wall of the cover 2, it is blocked by the partition rib 22 and the lower surface 33 of the meter 3, as shown by the arrow in the figure. Therefore, the inflow of warm air into the space 4 facing the front surface 32 of the meter 3 and the reading window 21 is blocked,
The warm air flow hardly touches either the reading window 21 or the front surface 32 of the meter 3, which has a lower temperature than the surroundings, and neither the reading window 21 nor the front surface 32 of the meter 3 is fogged due to condensation.

As explained above, according to the present invention, the cover 2
By simply providing a partition rib 22 in the reading window 21, clouding of the reading window 21 can be prevented, and the serious trouble of not being able to read the meter can be avoided.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional example, in which A is a front view and B is a cutaway side view. FIG. 2 shows an embodiment of the present invention, in which A is a front view and B is a cutaway side view. In the figure, 1 is a base, 2 is a cover, 21 is a reading window, and 22 is a partition rib. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. In an outdoor instrument box, which has a base on which a meter is attached and a cover with a transparent reading window on the front, the base and cover store the meter in an almost airtight state, and the cover is readable. Located below the space facing the window and the front of the instrument stored above, the tip overlaps the bottom surface of the instrument,
An outdoor instrument box characterized in that a partitioning rib formed to partition the entire inner surface of the cover into upper and lower parts is provided integrally with the cover.