JPH0453533Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) Levels have been widely used as an easy means for detecting whether the installation posture of an object is horizontal or not, or how much it is tilted. Regarding improving the accuracy of this type of level simply and appropriately,
The development results are described below.

(Prior Art) Japanese Utility Model Application Publication Nos. 62-119611 and 119612 disclose the attachment of a vial via a plastic holder to an elongated device stand made of an extruded aluminum hollow profile.

(Problems to be Solved by the Invention) Conventional levels, in which a vial is fixed in a holder and this holder is fitted and fixed to a slender instrument, have difficulty in locking each part of the holder to the vial and the slender instrument. In places where the requirements for machining dimensional accuracy are severe, otherwise the reliability of the instructions will be compromised,
I was at a disadvantage.

Therefore, by using a mechanism that allows fine adjustment of the relative position of the vial to the retainer that has shaft holes that help support the journals at both ends, it is possible to easily adjust the accuracy of the level without being subject to strict processing precision constraints. The purpose of this invention is to realize specific instructions.

(Means for solving the problem) This invention provides a level device in which a vial having journals at both ends is fixedly attached to an elongated instrument stand by a retainer having an axial hole for supporting the vial. A horizontal structure in which the journal at one end is eccentric with respect to the axis of the vial, and the axial hole of the retainer receiving the journal at the other end of the vial has a fitting gap that allows rotation of the vial under the above-mentioned eccentricity. This is a bubble tube positioning device for the vessel.

Here, the vial can be usually made of a cylindrical molded body of transparent acrylic resin, and the inner circumferential surface is the rotating surface of an arcuate curve around the axis of the cylinder. It has a liquid-filled chamber consisting of a medium-thick cavity,
A pair of indicator lines are provided equidistantly spaced apart from each other across the maximum inner diameter position of this medium-thick cavity, and the pair of indicator lines are arranged in an indicating posture that aligns the axis of the cylinder, that is, the axis of the bubble tube with the horizontal plane. Advantageously, a device is used in which a medium-thick cavity is filled with liquid, leaving a gas phase to form bubbles that occupies the length between the lines, and then the liquid-filled chamber is hermetically sealed.

The retainer may be an injection molded body of a material with good moldability, such as acrylic butadiene styrene (ABS) resin.

The elongate platform has at least one reference surface upon which the vial via the retainer is based. Hollow members of generally rectangular cross-section, especially those made of aluminum extrusions, are advantageously suitable.

Now, FIG. 1 shows the whole level according to this invention, in which 1 and 1' are bubble tubes, 2 and 2' are retainers, and 3 is an elongated base.

When the bubble tubes 1 and 1' are in the illustrated horizontal position of the elongated base 3, the bottom surface is set as the reference plane r, and the horizontality and verticality of the crosspiece or oyster material along which this is aligned are determined by the bubbles B in the tube.
They may be of the same shape and size and are made to be useful for detection based on the relative positions of the indicator lines m and m'.

The retainer 2, 2' for horizontal indication has a substantially U-shape in the front view of FIG. 1, while the retainer for verticality indication has a substantially annular shape.

The elongated base 3 has locking ribs extending in the longitudinal direction on the inner surface of the opposite long side of the hollow rectangular cross section so as to particularly facilitate the holding and fixing of the retainer 2. The vials 1 and 1' have journals j ₁ and j ₂ at both ends shown in the exploded perspective view of FIG. 2, one of which is slightly eccentric with respect to the axis of the vials 1 and 1'. However, the other may be a cylindrical surface common to the outer periphery of the vial 1, 1'. In addition, c in the figure is the bubble tube 1,
The inner cap of the liquid filling chamber 1', p is a plug that controls airtight sealing.

The retainers 2, 2' have axial holes h ₁ , h ₂ , h ₁ ', h ₂ ' that serve to support the journals j ₁ , j 2 of the vials 1, ₁ ', and the axial holes h ₁ , h ₁ ′ is the eccentric journal j ₁
The shaft holes h ₂ , h ₂ ′ receive the journals j ₂ , j ₂ ′, and the vial 1,
The same is true in that there is a clearance in the fit that allows eccentric rotation of 1'.

Retainer 2 has left and right bosses with shaft holes h ₁ and h ₂ formed therein.
A pair of front and rear spring leg pieces s are provided on the base connecting b ₁ and b ₂ , and these spring leg pieces s are attached to an elongated base 3.
While drilling a locking groove g that fits into the locking rib of
On the outer end surfaces of the bosses b ₁ and b ₂ , projecting portions o having a shape that matches the inner contour of the hollow rectangular cross section of the elongated base 3 are slightly protruded.

The retainer 2 has a pair of arc-shaped parallel locking claws n protruding from the outer circumferential surface thereof at an interval matching the inner width w of the hollow rectangular cross section of the elongated base 3, and is separated at the arc-shaped end. , is composed of a generally C-shaped torus, and by applying an external force to overlap the C-shaped torus at this separation position, the reduction in the outer diameter can be easily reversed.

The elongated base 3 has left and right bosses b 1 , b ₂ of the retainer ₂ at or near the center in its longitudinal direction, slightly deeper than the height H from the base of the retainer 2.
A cutout portion corresponding to the outer length L extending over the length, and a circular cutout portion corresponding to the outer diameter D of the torus body of the retainer 2' are provided on the long side wall of the rectangular cross-sectional profile away from the cutout.

(Function) In the level according to this invention, the bubble tubes 1 and 1' are inserted into the retainers 2 and 2', respectively, and then the retainer 2 is fitted into the notch of the elongated base, and the spring leg piece s is attached. push it in until it gets over the locking rib and engages with the locking groove g. At this time, press the retainer 2 boss
The overhanging protrusion o formed behind b ₁ and b ₂ tightly fits into the hollow cross-sectional inner contour of the elongated base 3,
It becomes a so-called stuck state, and on the other hand, the retainer 2'
is inserted into the hollowed out part of the elongated base 3 in the diameter-reduced position of the C-shaped toroidal body and restored to the facing position of the separated ends. Engages with the inner wall surface. Regarding the retainer 2', after this insertion, the bubble tube 1' is attached to the elongated base 3.
From the insertion hole drilled on the top surface of the retainer 2 to the shaft hole h ₂ ′,
You can also aim for h ₁ ′ and drop it.

In the above tentatively assembled position, the elongated base 3 is placed on a surface plate that has been strictly horizontally centered in advance, with the reference surface f aligned tightly. The bubble tube 1 is rotated until B is located at the center of the interval between the indicator lines m. It is clear that this rotation causes the bubble tube 1 to move up and down in accordance with the eccentricity of the eccentric journal j, so that the accurate bubble position can be easily determined. It can be properly fixed by injection into the gap with the journal.

Next, the bubble tube 1' is also fixed in an accurate pointing position in the same manner as described above, with the reference plane f of the elongated base 3 aligned with the vertical plane. Of course you can get it.

(Effect of the invention) According to this invention, even if the machining accuracy of the retainers 2, 2' and the elongated base 3 is not very high, the bubble tubes 1, 1' can be adjusted to the reference plane of the elongated base 3.
Since the relative positions of can be easily and accurately positioned, the accuracy required for the level can be achieved with reduced processing costs.

[Brief explanation of the drawing]

FIG. 1 is a front view, and FIG. 2 is an exploded perspective view. 1, 1'... Vial tube, 2, 2'... Retainer, 3
...Elongated base, j ₁ , j ₂ ... Journal, h ₁ , h ₂ ,
h ₁ ′, h ₂ ′……shaft hole.

Claims (1)

[Claims for Utility Model Registration] In a level device in which a vial having journals at both ends is attached and fixed to an elongated device stand by a retainer having a shaft hole for supporting the vial, the journal at one end of the vial is attached to an air bubble. Positioning of a vial in a level device, the retainer being eccentric with respect to the axis of the vial and having a fitting gap in which the axial hole of the retainer receiving the journal at the other end of the vial allows rotation of the vial under the above-mentioned eccentricity. Device.