JPH0718966Y2 - Level for horizontal and circular tube center point observation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a level for observing center points of horizontal and circular pipes. The conventional level has been widely recognized and used for a long time in construction work, etc., and its structure is such that it is made of a wooden or aluminum material, and the shape of the rectangular parallelepiped ruler body is Two horizontal observation tools for observing bubble movement are installed penetratingly, and it is possible to observe the tilt situation in the longitudinal direction and the lateral direction from the observation window from both parallel upper and lower surfaces. ing. During construction, when installing large-diameter circular pipes used for water and sewer construction,
In many cases, it is desired to measure the center point of the circular pipe. In that case, although it is a primitive method, it is easy to understand that the middle point is the center point when both side positions can be grasped,
Seen from the cross-sectional direction, it is almost buried up to the upper part,
In a situation where the parietal arc surface is partially exposed, it is a task that transcends the basic function, and of course it is impossible to request the function of observing the center point from the conventional level.
There is no choice but to take a separate measuring means. Therefore, the present invention has been made to solve the above-mentioned problems, and has a long hole-shaped perforated portion formed by penetrating from the central portion of the upper surface in the longitudinal direction of the rectangular parallelepiped ruler body to the central portion of the lower surface in the longitudinal direction. The hole-shaped perforated part is attached by curving from the center of the upper surface to both ends of the lower surface, and inside it is an arc tube in which bubbles in the water move in the longitudinal arc direction of the rectangular parallelepiped ruler body and the length of the central portion of the upper surface of the rectangular parallelepiped ruler body. A short hole-shaped perforated portion formed in parallel with the vicinity of the hole-shaped perforated portion, and a long horizontal that fits in the short-hole-shaped perforated portion and bubbles in water move in the longitudinal linear direction of the rectangular parallelepiped ruler body. With a tube,
A round hole-shaped perforated portion formed in a cylindrical shape from the upper surface to the lower surface of either one of the longitudinal ends of the rectangular parallelepiped ruler body,
A short horizontal tube that fits in the center of the inside of the perforated part of the round hole, and the bubbles in the water move in the short straight direction of the rectangular parallelepiped ruler body, and the long horizontal tube near the center of the side surface of the rectangular parallelepiped ruler body An elongated hole that allows you to see the position of the bubbles in the water of the long horizontal tube from the side of the rectangular parallelepiped ruler body,
At the center point observation level of the horizontal and circular pipes, circular arc pipes are placed on the circular pipe in the vicinity of both ends of the long hole-shaped perforated portion formed in the longitudinal direction of the central portion of the lower surface of the rectangular parallelepiped ruler body. Center point observation of horizontal and circular pipes, characterized in that a protrusion having a predetermined height and a predetermined width to equidistantly form the outer peripheral surface of the rectangular parallelepiped ruler is provided toward the lower lateral surface of the rectangular parallelepiped ruler body. The level is the gist.

An embodiment of the present invention will be described with reference to the accompanying drawings. (1)
Is a long rectangular parallelepiped ruler body, and is a horizontal observing tool (3) for observing bubble movement in water in the longitudinal direction and the lateral direction of the ruler, respectively.
(4) is installed in the center of a plurality of perforated parts (2) (2) penetrating the upper and lower surfaces in an orthogonal posture, and at the same time, transparent glass observation windows (5) are provided on the upper and lower surfaces to prevent foreign matter such as sand from entering. )
(6) is formed.

The above-mentioned structure is conventionally known, and a bubble-shaped arc-shaped observing tool (7) is added to the above-mentioned structure as a base.

In this configuration, a circular arc tube (8) having a constant curvature whose center is the center line (O) in the longitudinal direction of the upper surface of the rectangular parallelepiped ruler body (1) and whose both ends in which bubbles (K) are put in water is directed downward is long. It is formed by fitting and fixing in the trench (10), and fitting the central top (9) thereof on the center line (O). (11) is the ruler body (1)
Is a downward concave portion formed on the lower surface of the above, and has the same horizontal distance from the center line (O). The downward recess (11)
The lower surface of the ruler body (1) that forms the structure includes means for projecting and fixing the parallel leg pieces (12) (12) as shown in FIG.
As shown in the figure, there is a means for engraving within the thickness of the ruler body (1). In the embodiment of the above two downward recesses (11),
The former is cheaper to manufacture, and it is most desirable if it can be mass-produced by simply attaching parallel legs (12) (12) to a conventional product and if appearance is not taken into consideration.

In the above embodiment, (5a) is a front observation window formed so that the observation tool (7) can be observed from the front of the upper and lower surfaces. (13) is a direction observation magnet fixed at an appropriate position, which is convenient for grasping the direction at the construction site.

As described above, the present invention provides a long hole-shaped perforated portion penetrating from the central portion of the upper surface of the rectangular parallelepiped ruler to the central portion of the lower surface in the longitudinal direction, and the central portion of the upper surface of the elongated hole-shaped perforated portion. Curvedly attached to both ends of the lower surface, inside the arc tube where bubbles in the water move in the longitudinal arc direction of the rectangular parallelepiped ruler body, and in parallel with the oblong hole near the center of the upper surface of the rectangular parallelepiped ruler body. Any of the short hole-shaped perforated part formed, the long horizontal tube fitted in the short hole-shaped perforated part and in which bubbles in water move in the longitudinal linear direction of the rectangular parallelepiped ruler body, and the longitudinal end of the rectangular parallelepiped ruler body. A circular hole-shaped perforated part that is formed so as to penetrate cylindrically from the upper surface to the lower surface of one or the other, and is inserted into the center part of the inside of the circular hole-shaped perforated part, and bubbles in the water move in the short linear direction of the rectangular parallelepiped ruler body. Open the short horizontal tube and the horizontal rectangular tube near the center of the side of the rectangular parallelepiped ruler body. At the observation point of the center point of the horizontal and circular pipes, which has a long hole through which the positions of the bubbles in the water of the long horizontal pipe can be seen from the side of the main body of the rectangular parallelepiped ruler, Protrusions having a predetermined height and a predetermined width for making the arc tube equidistant from the outer peripheral surface of the circular pipe in the vicinity of both ends of the slotted hole formed in the longitudinal direction. Since the rectangular parallelepiped ruler body is placed on the lower surface of the rectangular parallelepiped ruler body and the rectangular parallelepiped ruler body is placed on the upper surface of the circular pipe exposed from the soil, the circular arc tube installed inside the rectangular parallelepiped ruler body is Due to the projections at the places, the circular pipe is always erected at an equal distance in the vertical direction with respect to the outer peripheral surface. Further, since the projection is provided over the entire width of the lower surface of the rectangular parallelepiped ruler body, the rectangular parallelepiped ruler body can be stably placed on the circular pipe. Therefore, roughly slide the rectangular parallelepiped ruler body left and right in the circumferential direction of the outer surface of the circular pipe to find the position where the bubble of the circular arc tube becomes the center point, and further make the bubble of the long horizontal tube the center point. Measure by moving the ruler body slightly. As described above, the present invention enables rough measurement with an arc tube and further highly accurate measurement with a long horizontal tube. For example, a mechanical angle meter or a protractor can be used. It has a unique effect that it is possible to measure extremely highly accurate measurement by simple work as compared with measuring equipment that measures the center of a circular tube using a level or a level with a flat lower surface. This was a particularly successful breakthrough.

[Brief description of drawings]

FIG. 1 is a front view, FIG. 2 is a front view, and FIG. 3 is FIG.
FIG. 4 is a front view of another embodiment of the downward recess (11) taken along the line A. (1) Ruler body, (2) Perforated part (3) (4) Observation tool, (7) Arc-shaped observation tool (8) Arc-shaped tube, (9) Central top (10) Ditch, (11) Downward recess (E) Circular tube, (K) Bubble

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Shown 54-10254 (JP, U) Shown 52-45459 (JP, U) Shown 52-14461 (JP, U) Shown 51- 43148 (JP, U) Actual public 54-32927 (JP, Y2) Actual public 58-7284 (JP, Y2) Actual public 52-38740 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A slotted perforation formed by penetrating from the central portion of the upper surface in the longitudinal direction of the main body of the rectangular parallelepiped body to the central portion of the lower surface in the longitudinal direction, and from the central portion of the upper surface of the perforated portion of the elongated hole to both end portions of the lower surface. It is attached by bending it, and inside it is an arc tube in which bubbles in the water move in the longitudinal arc direction of the rectangular parallelepiped ruler body, and a short pipe formed in parallel with the long hole-shaped perforated part in the center of the upper surface of the rectangular parallelepiped ruler body. Either a hole-shaped perforated portion, a long horizontal tube that fits in the perforated portion of the short hole and in which bubbles in the water move in the longitudinal linear direction of the rectangular parallelepiped ruler body, or the longitudinal end of the rectangular parallelepiped ruler body. A circular hole-shaped perforated part formed in a cylindrical shape penetrating from the upper surface to the lower surface of one or the other, and inserted into the inner central part of the circular hole-shaped perforated part, and bubbles in the water move in the short straight direction of the rectangular parallelepiped ruler body. The short horizontal tube and the above-mentioned central part of the side surface of the rectangular parallelepiped ruler body. At the center point observation level of horizontal and circular pipes, which has an elongated hole that is formed near the length of the horizontal pipe and allows the position of bubbles in the water of the long horizontal pipe to be seen from the side of the rectangular parallelepiped body, A predetermined height for making the arc tube equidistant from the outer peripheral surface of the circular pipe in the vicinity of both ends of the long hole-shaped perforated portion formed in the longitudinal direction at the center of the lower surface of the rectangular parallelepiped ruler body. And a center point observation level for horizontal and circular pipes, which is characterized in that a protrusion having a predetermined width is provided toward the lower surface of the rectangular parallelepiped ruler body.