JPH0313530B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Field of Industrial Application] The present invention relates to an indicating device for a liquid level gauge, which is a component of a liquid level measuring device.

[Conventional technology]

As shown in FIGS. 6 and 7, the liquid level measuring device includes a plurality of rotors 12 arranged vertically in multiple stages so as to be rotatable around a horizontal axis within a single vertical cylindrical housing 11. Outer guide tube 1
When the float 13 moves up and down within the float 5 in response to changes in the liquid level, the rotor is rotated 180 degrees due to magnetic coupling between the magnet 14 built into the float and the magnet built into the rotor.

The rotor indicating device in this type of liquid level measuring device is composed of one cylindrical housing 11, and the rotor has a through hole 16 for passing the shaft in the left and right direction as shown in FIG. 11
Each rotor 1 is
2 is supported within the housing 11.

However, in this conventional rotor support device, the rotor mounting housing 11 is composed of one real elongated member, so if the height (depth) of the container containing the liquid to be measured, such as a tank, is different, In each case, the housing 11 must be manufactured from a single real member with a length corresponding to the tank. Therefore, mass production is impossible and the housing must be custom-made, resulting in high costs.

In addition, processing such as inserting magnets into the rotor, drilling a hole for passing the shaft through, and passing the shaft inserted from the side of the housing 11 into the through-hole of the rotor in order to support the rotor into the housing 11, The disadvantage is that there are many assembly steps and many control items to stabilize the product.

[Problem that the invention seeks to solve]

The present invention constitutes a rotor unit in which one rotor is assembled to one rotor holder, and the rotor unit is structured so that it can be connected vertically, so that a rotor support device can be configured according to the height of the tank. The rotor unit can be easily assembled in a factory or on-site, so the rotor unit can be mass-produced, and the rotor support device can be assembled in a prefabricated manner with a length according to needs.

In addition, by making the rotor rotor made of magnetic plastic mixed with magnetic powder, it can be integrally molded with a protruding shaft that serves as a support shaft at both left and right ends, and it is possible to drill a hole for the shaft to pass through. This eliminates the need for assembly processes such as inserting the shaft into the rotor hole, thereby reducing the manufacturing cost of the rotor itself.

Structure of the present invention [Means for solving the problems] The liquid level indicator indicating device of the present invention includes a blade-shaped rotor that is suitably magnetized, and a size that can accommodate the rotor. A rotor holder is formed of a side plate and a back plate, and is constructed of a member having moderate elasticity, and is supported by the left and right side plates of the rotor holder and installed in the rotor holder so that the rotor can rotate around an axis that extends in the left and right direction. The upper and lower parts of the rotor holder are formed with male and female engaging parts for elastic engagement to connect the upper and lower holders, and the rotor is made of plastic mixed with magnetic powder. It is integrally formed from magnetic plastic.

[Actions and effects of the present invention]

The rotor unit of the present invention having the above configuration is as follows:
A magnetized rotor is installed around a horizontal axis (left and right protruding axes) in a single case-shaped holder, and the holder has moderate elasticity. Since male and female elastic engagement parts are formed, elasticity can be used to connect the upper male engagement part of the lower rotor unit holder to the lower female engagement part of the upper rotor unit holder. By press-fitting and engaging them, a large number of rotor units can be connected vertically to form a rotor support device of a desired length.

Therefore, if rotor units are mass produced,
There is no need for the conventional rotor support housing 11 made of one long real member, and by connecting the required number of rotor units, it is possible to easily assemble a rotor support device of a length according to needs in a factory or on site. Can be done.

From the above, (a) rotor units can be mass-produced without having to be custom-ordered, (b) low-cost rotor units can therefore be provided, and the manufacturing cost of the rotor support device can be reduced (c) rotor units can be manufactured in accordance with needs. (d) During transportation, the required number of rotor units can be transported in bulk, which is faster than when transporting the conventional long housing 11. Transportation costs can be significantly reduced (e) Space can be used efficiently during inventory and storage, and warehousing and cargo handling fees can be reduced (f) The rotor is made of magnetic plastic, which is made by mixing magnetic powder into plastic. By making it made of aluminum, it can be integrally molded into a product with protruding shafts that serve as supporting shafts at both left and right ends, eliminating the need for assembly processes such as drilling a hole for passing the shaft through and inserting the shaft into the hole.
(g) The manufacturing cost of the rotor itself can be reduced. (g) The rotor unit can be easily replaced.

[Example of the present invention]

Next, an embodiment of the liquid level indicating rotor unit according to the present invention will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral A indicates a liquid level gauge indicating device according to the present invention.

The unit consists of left and right side plates 1a, 1b and a back plate 1.
b is composed of a rotor holder 1 integrally molded, and a rotor 3 in the shape of an oblong blade having protruding shafts 2, 2 on the left and right sides. It is rotatably supported in bored bearing holes 4, 4, and is suitably magnetized.
Therefore, the rotor holder has a male engaging part 5 formed of an inward protrusion on the inside of its upper part, and a female engaging part 6 formed of a concave groove on the outside of its lower part. It is made of an elastic member (for example, plastic material), and when connecting the upper and lower rotor units, the male engaging part 5 in the holder of the lower rotor unit is connected to the female engaging part 6 in the holder of the upper rotor unit. It is designed to be elastically press-fitted.

The rotor is magnetized by being made of magnetic plastic mixed with magnetic powder, and is integrally molded with protruding shafts 2, 2 on the left and right sides.

In the figure, reference numeral 7 denotes a rotor indicator mounting body, 8 a transparent sight plate made of an acrylic resin plate, etc. attached to the front opening thereof, and 9 a stainless steel plate that connects the float guide tube and the rotor indicator mounting body. Showing the band made by.

In this embodiment, the upper engaging part 5 of the lower rotor unit is elastically press-fitted into the lower engaging part 6 of the upper rotor unit to connect the required number of rotor units vertically, and the height can be set according to needs. rotor pointing device can be assembled.

The liquid level indicating device constructed by assembling the rotor unit in this way consists of a float guide tube 1 shown in FIG.
5 with a band 9, for example, as shown in FIG.

When the float 14 containing the magnet 13 moves up and down in the float guide cylinder as the liquid level fluctuates, the rotor at the part where the float 14 approaches is rotated 180 degrees by the magnetic action of the float's magnet, thereby lowering the liquid level. Instruct.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of a liquid level gauge indicating device according to the present invention, FIG. 2 is a vertical cross-sectional side view taken along the - line in FIG. Figure 4 is a front view of a rotor indicating device configured by connecting the same rotor units, Figure 5 is a cross-sectional plan view of a liquid level measuring device equipped with a rotor indicating device configured by connecting the rotor units, and Figure 6 is a FIG. 7 is a front view of a conventional liquid level measuring device, FIG. 7 is a longitudinal sectional side view of the same device, and FIG. 8 is a perspective view of a conventional rotor and shaft. In the figure, A...rotor unit, 1...rotor holder, 1a...left and right side plates, 1b...rear plate, 2...
...Protruding shaft, 3...Rotor, 4...Bearing hole, 5...Male engaging part, 6...Female engaging part, 7...Rotor support device mounting body, 8...Sight plate, 9... …band.

Claims (1)

[Scope of Claims] 1. It is composed of a suitably magnetized blade-shaped rotor, left and right side plates and a back plate sized to accommodate the rotor, and a member having appropriate elasticity. The rotor holder is supported by the left and right side plates of the rotor holder so that the rotor can rotate around an axis extending in the left-right direction, and is provided within the rotor holder, and the upper and lower rotor holders are connected to each other on the upper and lower sides of the rotor holder. An appropriate number of rotor units each having male and female engaging parts for elastic engagement are connected in the vertical direction by the male and female engaging parts, and the rotor of the rotor unit at the part where the float with the magnet has arrived is floated. A liquid level gauge indicator that can be rotated 180° by the magnetic action of a magnet. 2. An indicating device for a liquid level gauge according to the invention described in the preceding paragraph, characterized in that the rotor is integrally molded from magnetic plastic mixed with magnetic powder.