JPS6027923Y2 - angle measuring instrument - Google Patents

Description

[Detailed description of the invention] This invention improves the measuring instrument by attaching a sub-arm to one end of the main arm so that it can be opened and closed, and bringing the outer ends of both arms into contact with the object to be measured, making it more practical. It is.

In other words, since conventional angle measuring instruments measure angles by bringing the main and sub arms into contact with the object to be measured, it is difficult to measure angles when, for example, an obstacle protrudes from the contact surface of the arms. However, in oil refineries and general buildings, there are many such obstacles in the angle measuring section, making it impractical.

The present invention avoids such drawbacks and is suitable for use.

The drawing shows an embodiment of the angle measuring instrument according to the present invention, and the angle measuring instrument A of the embodiment has a circular main plate 2 at the base end of the main arm 1, which has a reference scale a on the outer end along the longitudinal direction. A rotary piece 4 which is fixedly mounted, has an angle scale displayed on the peripheral edge of the main plate 2, is transparent to the angle scale, and is provided with a convex lens 3 on one side, which also serves as a connection, and has an angle display line C displayed thereon. The convex lens 3 of the hip rotation piece 4 is rotatably mounted on a pivot 5 at the center of the main plate 2.
The base end of the sub-arm 6 is removably attached to the opposite side of the sub-arm 6 with a screw 7, and a reference scale a' similar to the reference scale a of the main arm 1 is attached to the outer end of the sub-arm 6. Standard scale,
A pair of gap retaining rods 8, used in accordance with the appropriate position of a/
8 and 9, 9 are slidably fitted into each arm 1, 6, and the pair of gap retaining rods 8, 8 or 9, 9 are fitted to the leg rods 8a, 8a.
Alternatively, 9a and 9a are configured to have the same length.

FIG. 3 shows a principle diagram of the angle measuring instrument A of the present invention. In FIG. 3, a straight line passing through the pivot 5 connects the outer ends of the main arm 1, that is, the tips P, P of the gap retaining rods 8, 8. A line N that is parallel to the straight line M and connects the tips p', p' of the gap retaining rods 9, 9, which are slidably fitted to the sub arm 6, is perpendicular to the straight line. . 4 through secondary arm 6
The gap retaining rods 9, 9 are slidably fitted into the sub arm 6 by rotating the
When the tips P' and P' of the lens are applied to the other member of the object to be measured and the angle scale that coincides with the angle display line C of the convex lens 3 is read, the angle scale corresponds to the angle of the object to be measured.

The one shown in Fig. 2 shows an example of use, in which the main pipe m is
The object to be measured is composed of a branch pipe n welded in the cross direction of
A horizontal pipe S that becomes an obstacle to measurement is arranged between the main pipe m and the branch pipe n of the object to be measured B, and a desired gap retaining rod 8', 8' is installed corresponding to the position of this horizontal pipe S. and 9', 9'
are selected and slidably fitted onto each arm 1 and 6, respectively, and the gap retaining rod 8'.

The angle of the object B to be measured is read by applying the probes 8', 9', and 9' to the main pipe m or the branch pipe n.

The angle scale a is provided on each of the main and sub arms 1 and 6 on the gap holding rods 8° 8' and 9,
This is because the angle is always measured at the same position by placing it at a fixed position at 9'.

Moreover, illustration 10.11 shows a screw for fixing.

Since the present invention has the above-mentioned configuration, even if there is an obstacle between the pair of members constituting the object to be measured, this can be avoided by moving the gap retaining rod. It is possible to measure the relative angle between a pair of members,
Therefore, it is possible to provide this type of article that is unprecedentedly practical.

[Brief explanation of the drawing]

The drawings show an embodiment of the angle measuring device according to the present invention; FIG. 1 is a front view, FIG. 2 is a usage diagram showing another embodiment, and FIG. 3 is a principle diagram. 1...Main arm, 6...Secondary arm, 8
, 8'... Gap retaining rod, 9, 9'......
Gap retaining rod, P. P'...Tip of gap retaining rod.

Claims (1)

[Scope of utility model registration request] An angle measuring instrument in which the sub-arm is attached to one end of the main arm so that it can be opened and closed, and the outer ends of both arms touch the object to be measured to measure the angle of the object. A structure in which a pair of gap retaining rods for maintaining the gap between the arm and the object to be measured are fixedly and slidably fitted to each of the arms.