JPH032809Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spirit level used for horizontally positioning two bolt holes of a flange for a pipe joint.

The conventional positioning method, as shown in Figure 1,
Bolt holes 12a, 1 to be horizontal in flange 10
The side edge of a conventional level 14 is aligned with the end of the flange 2b, and the level 14 is pressed against the flange 10 and rotated as a unit to determine the horizontal position. Or the flange 10 as shown in FIG.
Insert pin 1 into bolt holes 12a and 12b that should be horizontal.
6a, 16b, and then insert the pins 16a, 16b.
A standard level is placed on top to find the level. However, the former method has poor workability, and the latter method has the disadvantage that it becomes inaccurate if there is a gap between the bolt hole and the pin.

In addition, a dedicated spirit level that is attached to the bolt hole of the flange is also known (U.S. Patent No.
3,822,481 and 4,133,115), it is inconvenient to handle because the bolt holes must be sandwiched from both sides.

Therefore, the present invention aims to realize a flange level that is highly operable and accurate and can be used by simply inserting it into a bolt hole from one side.

The present invention consists of a leveling tool, two arms attached to the bottom of the leveling tool, and a device that is attached to the tip of each arm facing the side of the leveling tool and inserted deeply into a bolt hole of a flange. It consists of a taper pin, and a mechanism that opens and closes the arm and the taper pin symmetrically with respect to the vertical line of the leveling device passing through the center of gravity, so that when the taper pin is inserted into the bolt hole of the flange from one side and left, it will not fall and the above-mentioned This is a flange level that allows you to keep the leveling tool parallel to the bolt hole.

The present invention will be described below with reference to embodiments shown in FIGS. 3 to 6. Reference numeral 20 denotes a spirit level of the present invention, which has a bubble leveling device 22 at its upper end. Below the horizontal tool 22, two identical gears 24a, 24
b are meshed with each other, and arranged so that their axes are aligned in the horizontal direction of the leveling tool 22 and facing to the side of the leveling tool 22. Arms 2 of the same shape are attached to these gears 24a and 24b.
6a and 26b are each fixed symmetrically with respect to a vertical line, and taper pins 28a and 28b of the same shape are protruded from the sides of the ends of the arms 26a and 26b, respectively.

This level is used as follows. Arm 26a,
26b, and insert taper pins 28a, 2 into the bolt holes 12a, 12b of the flange 10, which should be made horizontal.
8b as deep as possible and rotate the flange 10 so that the leveling tool 22 is horizontal. Taper pins 28a, 28b are gears 24a, 24b.
And the arms 26a, 26b always keep the horizontal tool 22
This is because they are lined up in the horizontal direction.

Note that the taper pins 28a and 28b are connected to the bolt hole 1.
2a, 12b, the level 20 can be released and used with the open arm side of the level 20 tilted from the vertical, as shown in FIG. The center of gravity of this spirit level 20 is the taper pin 28
This is because the line connecting the bolt holes 12a and 12b is parallel to the horizontal line of the horizontal tool 22 even in this state since it is located on the center plane of the bolt holes 12a and 28b.

In the above embodiment, a mechanism consisting of gears 24a and 24b was used as the mechanism for opening and closing the taper pin and the arm, but other mechanisms may also be used to open and close the taper pin symmetrically with respect to the vertical line of the leveling device passing through the center of gravity. Obviously, anything is fine.

As mentioned above, the level of the present invention is such that the taper pin is always positioned symmetrically with respect to the center of gravity, so even if the open arm surface is tilted, just by inserting the taper pin into the hole in the flange. Accurate horizontality can be known and handling is extremely convenient. Furthermore, since this level uses a taper pin, it can be used for bolt holes of various diameters, and the gap between the taper pins can be changed, so it can be used for various flanges. , has a wide range of applications and is extremely useful.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams showing a conventional positioning method, FIG. 3 is a perspective view of an embodiment of the present invention, FIG. 4 is a sectional view of the same side, and FIGS. 5 and 6 are the same. It is a front view. 22...Leveling tool, 24a, 24b...Gear, 2
6a, 26b...Arm, 28a, 28b...Taper pin.

Claims (1)

[Claims for Utility Model Registration] 1. A leveling device, and 2. A leveling device attached below the leveling device.
A book arm, a taper pin attached to the tip of each arm facing the side of the leveling tool and inserted deeply into the bolt hole of the flange, and connecting the arm and the taper pin to the vertical line of the leveling tool passing through the center of gravity. A mechanism for opening and closing symmetrically with respect to the flange, which prevents the leveling tool from falling and keeps the leveling tool parallel to the bolt hole when a taper pin is inserted into the bolt hole of the flange from one side and left unattended. Level. 2. In the spirit level set forth in claim 1 of the utility model registration claim, as a mechanism for opening and closing the taper pin,
A flange level using a mechanism in which identical gears are provided at the base of each arm and the gears mesh with each other.