WO2003052349A1

WO2003052349A1 - Rotating-body device and scaled level device

Info

Publication number: WO2003052349A1
Application number: PCT/JP2002/012910
Authority: WO
Inventors: Seiichi Harada
Original assignee: Seiichi Harada
Priority date: 2001-12-14
Filing date: 2002-12-10
Publication date: 2003-06-26
Also published as: JP2003185432A; CN1589391A; JP3968502B2

Abstract

A rotating-body device in which an inner cylinder can be rotated smoothly with a little friction in an outer cylinder, and a scaled level that uses the device. In the rotating-body device, an inner cylinder (2) is supported rotatably in an outer cylinder (1) by a bearing, and a liquid (5) is provided between the inner cylinder (2) and the outer cylinder (1). The bearing has depressions provided at the centers of the outer cylinder (1), and also has shafts (9) that are provided at the centers of the inner cylinder (2) and fitted into the depressions. The shafts (9) of the bearing form buoyancy bearings that are positioned by the buoyancy of the inner cylinder (2) rotatably in the depressions with small clearances being kept in a non contact way. A scaled level is structured by providing a scale (4) on the periphery of the inner cylinder (2) of the rotating-body device, a weight (3) arranged away from the shafts (9), and a reference line (10) provided on the outer cylinder (1).

Description

Rotary device and scale level Technical field

The present invention relates to a rotating body device in which an inner cylinder is rotatably supported by a bearing in an outer cylinder, and the bearing is completely floated in the bearing. This eliminates friction caused by rotation.The inner cylinder is smoothly rotated in the outer cylinder, and the slight change in the rotation angle of the inner cylinder is taken out as a displacement on the circumference with high sensitivity. A scale level, angle sensor, microphone mouth motor, etc. that provide revolutionary convenience in civil engineering design, construction and inspection, which can measure the rotation angle and can read 360 degrees with one touch. The present invention relates to a rotating body device. Background art

Most conventional levels use the bubble tube shown in Fig. 6. It can only measure horizontal, vertical, 45 degrees. There is a device that reads an arbitrary inclination by moving the bubble tube with a gear mechanism. However, since the knob is turned with a thumb to drive the gear mechanism, the operability is extremely poor and it is difficult to put into practical use. In addition, there is a pointer type, but this is not suitable for civil engineering construction sites because the bearing is easily worn and deformed. One it was, buoyancy and gravity scale Level utilizing the balance of (real Hei 0 7 - 0 0 2 8 3 9) there are, _c also have not yet been commercialized have several drawbacks, patent publications The tilt angle sensor composed of a rotating body in a liquid, a magnetoresistive element, and a permanent magnet (actually known as 57-122), a moisture meter using water and a protractor ( Actual opening 6 1—9 2 8 0 7), crossing in a V shape There are two planes, an angle indexing device using water (Japanese Utility Model Application Laid-Open No. 62-71017), and a tilt angle sensor using capacitance (Japanese Patent Laid-Open No. 5-172715). None of them have been put to practical use. As for the fluid bearing, there are a fluid bearing device (JP-A-5-330372), a motor equipped with a fluid bearing (JP-A-10-322927), and the like. For the bearing that is completely floating in the bearing as in the present invention, such as by reducing the wear of the conventional bearing, improving the oil retention and slidability, or eliminating bubbles. Is not found at all.

As mentioned in the prior art, more than 98% of the conventional spirit level is a water bubble type and measures only 45 degrees, horizontal and vertical, and construction has been performed depending on intuition at the middle angle . Therefore, there was a problem that if the instinct was lost, the construction had to be redone. In addition, there is no way for designers to check how many slopes there are when inspecting the results of construction work, so there is currently no actual inspection for slopes. That is because there was no instrument that could easily measure any angle.

For example, if it is known that the inclination of the floor is 2 degrees, it can be clearly specified at the design stage.The construction is performed while measuring the inclination using a spirit level, and the same is applied to the inspection. If the construction can be checked using the above level, the quality of the work can be significantly improved.

The above-mentioned scale level (actual square root 0 7—0 0 2 8 3 9) has a function to measure an arbitrary angle, but if you try to measure a minute angle such as 1 degree, for example, Due to the friction of the small projections, the inner cylinder could not smoothly change the angle, resulting in poor sensitivity.

In addition, the above-mentioned graduation level (actual opening level 0 7-0 0 2 8 3 9) has a small projection on the inner wall of the outer cylinder so that the inner cylinder is located at the center of the cylinder. In mass production, it is difficult to maintain uniform quality when attaching small projections to the inner wall of the cylinder, and mass production is not possible. . SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotator device capable of smoothly rotating an inner cylinder within an outer cylinder with small friction, and a graduation level using the same. Disclosure of the invention

In order to solve the above problem, a buoyancy bearing that does not receive the load of gravity on the shaft due to the balance between buoyancy and gravity is provided, enabling the inner cylinder to be positioned at the center of the outer cylinder and eliminating small protrusions Accordingly, the present invention provides a rotating body device capable of smoothly rotating the inner cylinder inside the outer cylinder except for frictional force.

In addition, a scale and a weight are provided on the peripheral surface of the inner cylinder, and a reference line is provided on the outer cylinder to form a main part, and a minute angle is set on the circumference of the inner cylinder. It provides a scale that can be converted to displacement to measure the tilt angle with high sensitivity, while at the same time enabling mass production and stable quality.

With the scale according to the present invention, it is possible to quantitatively design, construct, and inspect the slope at each stage of design, construction, and inspection of civil engineering buildings, and to provide a grade that can withstand the environment of the civil engineering construction site. become.

According to Archimedes' principle, it is known that an object in a liquid receives buoyancy by the weight of the liquid eliminated by the object.The force that the object eliminates, as in the present invention, is extremely larger than the volume of the object. Experiments have confirmed that the Archimedes principle holds even in a small number of cases. This allows the inner cylinder to float completely within the outer cylinder, and the shaft Located a few tens of microns within the bearing, the buoyancy bearing serves to maintain only its position without receiving the load of gravity. The rotator device of the present invention can be applied to the above-mentioned graduation level, a micromotor, and an angle sensor for the direction of gravity in the fields of biotechnology and micromachines. Brief description of drawings ·

FIG. 1 is a side view of a part of a scale in which an outer cylinder and an inner cylinder are combined in a scale level having a buoyancy bearing according to an embodiment of the present invention.

FIG. 2 is a front view of the main part of the scale having the buoyancy bearing shown in FIG.

FIG. 3 is a side view of the buoyancy bearing in the scale having the buoyancy bearing shown in FIG.

Fig. 4 is a diagram of the scale and the reference line of the scale with the buoyancy bearing shown in Fig. 1.

FIG. 5 is an overall view of a scale level having a buoyancy bearing according to an embodiment of the present invention.

Figure 6 is a diagram of the bubbles in the bubble level. BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described with reference to the drawings. In Fig. 1, the outer cylinder 1 and its lid are made by injection molding. The outer cylinder 11 and the lid are provided with a bearing 8 formed at the center of the circle with a recess of, for example, 2.1 mm. Also, the inner cylinder 2 and its lid are made by injection molding. The inner cylinder 1 and the lid are provided with a shaft 9 having a diameter of, for example, 2 mm at the center of the circle. The weight 3 is bonded at a position away from the shaft 9 of the inner cylinder. The weight of the weight 3 is set so that the sum of the weights of the inner cylinder 2 and the weight 3 is equal to the weight obtained by multiplying the volume of the inner cylinder 12 by the specific gravity of the liquid 5. A lid is adhered to the inner cylinder 1 and sealed, and the scale 4 graduated once every 360 degrees on the peripheral surface of the inner cylinder 2 is attached.

內 Cylinder 2 is mounted by fitting the shaft 9 and bearing 8 in the outer cylinder 1 and attaching the lid to the outer cylinder 1, and through the small hole on the side of the outer cylinder 1, the outer cylinder 1 and the inner cylinder A liquid such as a syringe oil is injected into the space between the two. If the weight of the weight 3 is correct, the inner cylinder 1-2 completely floats in the outer cylinder 1, and the shaft 9 also floats in the bearing 8 as shown in FIG.

Since the gap between the outer cylinder 1 and the inner cylinder 2 is only 1 mm, for example, the volume of the liquid 5 to be put in it is much smaller than the volume of the inner cylinder, but the principle of Archimedes holds, Cylinder 2 can completely float in liquid 5.

Write the reference line 10 on the outer surface of the outer cylinder 1 (Fig. 4). The scale 4 of the inner cylinder 12 and the reference line 10 of the outer cylinder 1 are complementary to each other, for example, green and red. When the scale 4 and the reference line 10 overlap, the color changes to black, so reading errors can be reduced.

The meter section 6 composed of the outer cylinder 1 and the inner cylinder 1 constructed in this way is fixed to the housing 7 placed on the horizontal plate so that the 0-degree scale and the reference line overlap. A scale with five buoyancy bearings is completed. Industrial applicability The present invention has a feature in a buoyancy bearing. The inner cylinder 1 eliminates a load caused by gravity and friction in rotation in the outer cylinder 1 and provides a rotating body device capable of accurately and smoothly rotating the inner cylinder. it can.

The scale level to which the present invention is applied has the following effects.

The range of measurement will be described. The graduation level having the buoyancy bearing of the present invention can read an arbitrary inclination angle of 360 degrees as well as horizontal and vertical. Therefore, in civil engineering construction, not only the floor, but also the slope of walls, pillars, gates, etc. It is an epoch-making thing that can easily read the inclination angle with an accuracy of 0.5 degrees simply by placing or following the scale of the present invention on the measuring surface without any procedure.

The quantitative use of the tilt angle will be described. At present, expensive surveying instruments using lasers are used for large structures such as buildings, but there is no suitable measuring instrument for measuring angles in the construction of houses and small scales. Therefore, even if the architect comes to the inspection after the completion of the construction of the house, he does not check the inclination of the floor surface at all, so he does not check it. In such a case, if the scale level of the present invention is used, the inclination angle can be easily read directly, and if necessary, an appropriate instruction can be given to restart the construction. By using this level, plasterers and plumbers can use conventional intuition to perform measurable construction work. The corners can be shown many times, and the whole construction systematically improves in quality.

The sensitivity and the reading accuracy will be described. The conventional bubble-type level has bubbles in a glass tube with a large radius of curvature, so Then, the displacement of the bubbles is large. In other words, the sensitivity is better for horizontal measurement only. However, as shown in Fig. 5, the presence of an air bubble in the center of the two lines is determined by the human eye, which has the disadvantage of large reading errors. The scale level of the present invention is sensitive to minute angle changes because the shaft is floating in the bearing due to the balance between buoyancy and gravity, so it is not subjected to loads due to frictional force or gravity. A shift on the circumference was obtained, and high sensitivity was achieved. Also, since the scale is read by the overlap of the reference line and the scale, the reading accuracy is good.

In addition, by adopting complementary colors for the scale and the reference line, the color changes when the scale overlaps, so that the reading accuracy can be improved.

Claims

The scope of the claims

1. The inner cylinder is rotatably supported by a bearing in the outer cylinder, and a liquid is filled between the inner cylinder and the outer cylinder. The bearing is provided at the center of the outer cylinder. And a shaft provided at the center of the inner cylinder and fitted in the recess. The shaft retains a slight gap in the recess by the buoyancy of the inner cylinder, and A rotator device characterized by forming a buoyancy bearing which is positioned in rotation by contact.

2. In the rotating body device according to claim 1, a scale is provided on a peripheral surface of the inner cylinder, a weight is provided at a position away from the shaft, and a reference line is provided on the outer cylinder to form a meter, A scale level with a housing for storing part of the meter.

3. The scale and the reference line are drawn using colors having a complementary color relationship to each other, and the color is changed when the scale and the reference line are overlapped to make it easier to read. The scale level according to claim 2, wherein: