JPH0642968A - Level - Google Patents

Abstract

PURPOSE:To easily and accurately judge the inclination of an installation face with reference to a reference face by a method wherein the contact of a contact maker situated between two electrode plates installed at an arbitray interval with the electrode plate is detected by whether a light part is turned on or off. CONSTITUTION:A spindle rectlinearly advancing micrometer head 5 is turned, and the interval between electrode plates 1, 2 is set arbitrarily via racks 3, 4 and a spur gear 6. A contact maker 7 suspended from a support rod 9 via a lead wire 8 comes into contact with the lower side of either of the inclined electrode plates 1, 2 when it is placed on a face in which an installation face 17 is tilted with reference to a horizontal reference face and whose level has not been established, and either of light parts 13, 15 connected to the electrode plates brought into contact is turned on. Thereby, it can be recognized that the level is not established. In addition, when the contact maker 7 is placed on a face in which the reference face is parallel to the installation face 17 and whose level has been established, the contact maker is not made conductive because it does not come into contact with any of the electrodes plates 1, 2, any of the light parts 13, 15 is not turned on, and it can be judged that the level is not established.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spirit level, and more particularly to a spirit level applicable to machine precision setting such as parallelism.

[0002]

2. Description of the Related Art As a conventional level, there is a level as in the Kotosha Co., Ltd. '90 catalog concise. As shown in FIG. 3, the conventional spirit level is one in which a liquid 22 is enclosed in a sealed glass tube 20 so as to leave a specified amount of bubbles 21 and the sealed glass tube 20 is attached to a master block 23.

In order to obtain the levelness of the target surface using a conventional level, the master block is placed on the target surface, as shown in FIG.
As shown in FIG. 4, a person adjusts the inclination of the target surface according to the position of the bubble 21 in the closed glass tube 20 so that the bubble 21 comes to the center of the closed glass tube 20 as shown in FIG. 4B.

[0004]

In the above-mentioned conventional level, although the level can be understood to some extent depending on the position of the bubble 21 and the scale on the master block 23, how much the bubble level is quantitatively inclined. There was a drawback that I didn't understand.

[0005]

The spirit level of the present invention comprises a first electrode plate, a second electrode plate arranged in parallel with the first electrode plate, and a non-conductive material connected to the first electrode plate. The first rack of
A non-conductive second rack connected to the second electrode plate, a spindle straight-moving micrometer head connected to the first rack, a spur gear arranged between the first rack and the second rack, A spherical contact located between the first electrode plate and the second electrode plate, a lead wire that suspends the contact at the tip, a conductive support rod connected to the other end of the lead wire, and the support rod. A power source section for electrically connecting one electrode, a first light section for electrically connecting one terminal to the first electrode plate and the other terminal to the other electrode of the power source section, and the second electrode A second light portion that electrically connects one terminal to the plate and the other terminal to the other electrode of the power supply portion, and the support rod, and when placed on a horizontal plane, the contactor And a non-conductive casing having a mounting surface located between the one electrode plate and the second electrode plate. That.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention. 2A and 2B are schematic diagrams showing the operating principle of the present embodiment.

The electronic level shown in FIG. 1 comprises a first electrode plate 1, a second electrode plate 2 arranged in parallel to the first electrode plate 1, and a non-conductive first electrode plate connected to the first electrode plate 1. The rack 3, the non-conductive second rack 4 connected to the second electrode plate 2, and the spindle straight advance type micrometer head 5 connected to the first rack 3.
A spur gear 6 arranged between the first rack 3 and the second rack 4, and a spherical contactor 7 located between the two first electrode plates 1 and 2 described above, A lead wire 8 having one end connected to the contact 7, a conductive support rod 9 connected to the other end of the lead wire 8, and a lead wire 10 having one end connected to the support rod 9.
A power supply unit 11 attached to the other end of the lead wire 10, a lead wire 12 connecting one end to the first electrode plate 1, and a lead wire 1
2, the first light portion 13 attached to the other end of the second electrode plate 2, and the second electrode plate 2
A lead wire 14 having one end connected to a second write portion 15 attached to the other end of the lead wire 14, a lead wire 1 connecting the first write portion 13, the first write portion 15 and the power supply portion 11.
6 and all the above-mentioned components are connected to both ends of the supporting rod 9 and, when placed on a horizontal plane, the contact 7 and the lead wire 8 connecting to the contact 7 are connected to the first electrode plate 1 and the second electrode plate 2. It is composed of a non-conductive casing 18 having an installation surface 17 located in the middle of the electrode plate 2.

The operating principle of the electronic level shown in FIG. 1 is as follows.

When the distance between the first electrode plate 1 and the second electrode plate 2 is D, the diameter of the contact 7 is d, and the length of the lead wire 8 is L as shown in FIG. The inclination θ that can be determined by the instrument is approximately represented by θ = tan ⁻¹ (D−d) / 2L.

By rotating the micrometer head, the distance D between the first electrode plate 1 and the second electrode plate 2 can be arbitrarily set and used as a level of any quantitative accuracy.
As an example, when the distance D = 2.02 mm, the diameter d = 2 mm, and the length L = 200 mm, the inclination of 10 seconds or more can be determined.

Due to the above-mentioned structure, when the installation surface 17 is placed on a surface which is not inclined and is inclined with respect to the horizontal reference surface 19 as shown in FIG. The contactor 7 suspended from the support rod 9 through the lead wire 8 contacts and conducts with the inclined first electrode plate 1 or the second electrode plate 2, and when one side is high, Light part 1
3 is high on the other side, the light unit 15 illuminates. From this, it can be recognized that the level is not high because which side is higher.

However, when the reference surface 19 and the installation surface 17 are placed on a level surface in which the reference surface 19 and the installation surface 17 are parallel to each other, as shown in FIG. Since it does not come into contact with either of the two electrode plates 2, it does not conduct and the light parts 13, 15
Does not illuminate. From this, it can be determined that the level is out.

[0014]

According to the spirit level of the present invention, by using the contactor as a pendulum and rotating the micrometer head, the distance D between the electrode plates contacting the contactor when tilted by the two racks and the spur gear is set to an arbitrary value. The interval can be set, and whether the level is within the quantitative tilt angle range indicated by the dial can be recognized by turning on / off the light unit, and the tilt can be easily and accurately determined.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a spirit level according to the present invention.

FIG. 2A is an operation schematic diagram when the level in the embodiment shown in FIG. 1 is not obtained, and FIG. 2B is an operation outline diagram when the level is obtained in this embodiment.

FIG. 3 is a perspective view showing a configuration of a conventional spirit level.

4 (a) is an operation schematic diagram when the level is not present in the conventional spirit level shown in FIG. 3, and FIG. 4 (b) is an operation schematic diagram when the level is achieved in this conventional spirit level. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st electrode plate 2 2nd electrode plate 3 1st rack 4 2nd rack 5 Spindle straight advance type micrometer head 6 Spur gear 7 Contactor 8 Lead wire 9 Support rod 10 Lead wire 11 Power supply section 12 Lead wire 13 First light Part 14 Lead wire 15 Second light part 16 Lead wire 17 Installation surface 18 Casing 19 Reference surface 20 Closed glass tube 21 Bubble 22 Liquid 23 Master block

Claims (1)

[Claims] 1. A first electrode plate, a second electrode plate arranged in parallel with the first electrode plate, a non-conductive first rack connected to the first electrode plate, and the second electrode plate. A non-conductive second rack connected to the first rack, a spindle linear micrometer head connected to the first rack, a spur gear arranged between the first rack and the second rack, the first electrode plate and A spherical contact located between the second electrode plates, a lead wire that suspends the contact at the tip, a conductive support rod connected to the other end of the lead wire, and one electrode electrically connected to the support rod. Electrically connected to the first electrode plate, one terminal electrically connected to the other electrode of the power source unit and the other terminal of the power source unit, and one terminal to the second electrode plate A second light part for electrically connecting the other terminal to the other electrode of the power source part, and holding the supporting rod, And a non-conducting casing having a mounting surface intermediate the first electrode plate and the second electrode plate when placed on a surface.