JPS6298213A - Perpendicularity measuring instrument - Google Patents

Abstract

PURPOSE:To perform measurement in a short time without being influenced by a wind by fixing a linear body on a point of the base of a hollow bar-shaped body and fitting a float on the other end of the linear body. CONSTITUTION:The linear body 2 is fixed on the point 7 of the base of the hollow bar-shaped body 1. The float 3 is fitted on the other end of the linear body 2 and the linear body 2 is fixed on the point 7 so that the float can be freely swayed. Then, in order to enlarge the buoyancy of the float 3 from the point of measuring accuracy, etc., when the hollow bar-shaped body 1 is filled up with gas, the specific gravity of the float 3 is made lighter than the gas and when the hollow bar-shaped body 1 is filled up with a liquid, the use of water which is inexpensive and easily supplied is proper. Further, a transparent plate 4 is provided to the upper end part of the hollow bar-shaped body 1 and a point where a perpendicular line set up from the point 7 where the linear body 2 is fixed is to pass is indicated clearly on the plate 4 and the perpendicularity of an object to be measured can be easily estimated. Accordingly, since this instrument utilizes the buoyancy, it does not take a time until the float 3 tops and the linear body 2 and the float 3 are surrounded by the hollow bar- shaped body 1 and the accurate measurement can be performed without being influenced by the wind.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial use!?) The present invention relates to a verticality measuring tool. More specifically, it is used for the same purpose as the verticality measuring device conventionally called "r-F plumb bob", but because its working principle is different, it is called "r-F plumb bob". Regarding sex measuring instruments.

(Prior Art) A verticality measuring device called a plumb bob, which has been used conventionally, hangs a weight attached to a string along a column and measures the deviation in parallelism between the string and the column, for example. , the verticality of a pillar is measured by looking at how it overlaps with a straight line drawn on the pillar with an ink pot.

(Problems to be solved by the invention) In the case of a plumb bob, it takes time for the weight to completely stop swinging, and when there is wind, the swing does not stop easily, making measurements very inaccurate. There were drawbacks.

SUMMARY OF THE INVENTION An object of the present invention is to provide a verticality measuring tool that can solve the above-mentioned problems of the conventional plumb bob and measure verticality in a short time and/or without being affected by wind. shall be.

(Means for solving the problems) In order to achieve the above object, the present invention has the following configuration. That is, the linear body is fixed to one point on the bottom of a hollow rod-shaped body having a bottom.

A float is attached to the other end of the linear body.

(Function) While a plumb bob measures the verticality of an object to be measured, such as a column, by using the gravity applied to a weight, the plumb bob, which is a verticality measuring device of the present invention, uses the buoyancy force acting on a float. This is what I did. Therefore, it does not take long for the float to stop, because the float is light and the moment of inertia of swinging is small. On the other hand, in conventional plumb bob swings, the weight must be quite thick in order to reduce wind effects such as gJ, and as a result, the moment of inertia is large and it takes time for the swing to stop. Furthermore, in the lifting swing of the present invention, since the linear body and the float are housed in the hollow rod-shaped body, the swing of the float stops in a short time without being affected by wind.

(Example) Embodiments of the invention will be described with reference to the drawings.

In FIG. 1, the single beard swing of the present invention has a hollow rod-shaped body (
1), a linear body (2), and a float (3) as basic components. This hollow rod-shaped body (1) can take various shapes such as cylindrical, triangular, square, and others. In short, when this hollow rod-shaped body (1) is erected almost vertically, it is only necessary that the linear body and the float can extend in the vertical direction without touching the inner wall of the hollow rod-shaped body (1). The hollow rod-shaped body may be made of a transparent or translucent material, or may be made of an opaque material. If it is substantially transparent, it is possible to see through the linear body (2) and the straight line drawn on the pillar with an ink pot, for example, and the perpendicularity can also be evaluated by looking at their overlap. This hollow rod-shaped body may be configured to be vertically expandable and contractible, making it convenient to carry. This telescopic and rotational structure may be of a known type, such as a bellows type or a type that can be inserted and pulled out like a telescope tube.

The hollow rod-shaped body (1) has a bottom surface, and the linear body (2) is fixed to one point (7) of the bottom surface. This linear body can be composed of a filamentous material or a string-like material. It can also be made of wire-like material, but since it cannot be bent freely, only one point (7
) must be configured so that the float (3) can swing freely, otherwise it will not work as a verticality measuring device.

The float (3) is attached to the other end of the linear body (2). The shape of this float is not particularly limited. It is preferable that the float has a clearly marked point or line through which a vertical line drawn from a point (7) on the bottom of the hollow rod-shaped body (1) mentioned above passes. If the hollow rod-shaped body is made of a transparent material, if it is clearly displayed in a position that is visible from the lateral direction, this point or line can be seen through instead of the linear body (2) to evaluate verticality. I can do it. It is preferable that such a point be clearly indicated at a position of the float that is visible from the top, since this makes it easy to measure the verticality when used in conjunction with a transparent plate (4) to be described later. If this point is to be clearly indicated on the top, it can be clearly indicated by drawing a dot if the top of the float is relatively flat. If the float is transparent, points can also be marked inside or on the bottom of the float. If the L part of the float is sharp and the apex coincides with that point, you can recognize that it is clearly marked without having to draw anything in particular. It goes without saying that it is preferable to increase the buoyancy of this float as much as possible from the viewpoint of measurement accuracy and the like. When the hollow rod-shaped body is filled with air or other gas, the float must have an apparent specific gravity that is lighter than the specific gravity of the gas, such as a balloon, and the inside of the float must be It is filled with a light gas such as hydrogen or helium gas.

It is preferable that the inside of the hollow rod-shaped body (1) be filled with a liquid such as water at least during use, rather than a gas, because the buoyancy force applied to the float (3) will be large, and the specific gravity of the liquid is high. The larger the material, the greater the buoyancy, but wood is preferable because it is inexpensive and can be easily procured during use.

In the case of a configuration that is always filled with gas or liquid other than air,
It goes without saying that the upper end of the hollow rod-shaped body must also be closed.

According to a preferred embodiment of the invention, a substantially transparent plate (4) is provided at the upper end of the hollow rod-shaped body (1), and the linear body (2) is provided on the transparent plate (4). A fixed point (7)
The point through which the vertical line drawn from the square should pass is clearly indicated.

This makes it easy to evaluate the verticality of vertical objects such as columns by observing the degree of overlap between the points clearly visible on the float and the points on the transparent plate from above. be able to. Further, the transparent plate may be provided with a scale, in which case the perpendicularity can be further easily evaluated. As shown in FIG. 1, the scale may be placed only on a radial line in one direction or in two or more directions, but it may also be placed in a concentric circle or grid pattern. In any case, it is sufficient in most cases if the scale is placed around the point through which a vertical line drawn from at least one point (7) on the transparent plate (4) should pass. This transparent plate (
4) is within the range where the linear body (2) does not come into contact when stretched;
It is preferable to be as close to the float as possible because measurement errors due to deviations in observation angle during observation from above can be reduced. If this transparent plate (4) is composed of a convex lens, or if a convex lens other than this transparent plate is provided above or below this transparent plate, the degree of deviation from the vertical line of the point clearly marked on the float can be magnified and observed. It is possible to improve measurement accuracy.

The verticality of the object to be measured can be evaluated by closely fixing the lifting swing described above to the object to be measured, such as a column, and observing it from above. This tight fixation can be achieved by wrapping a string-like object around the pillar or the like.

Alternatively, the verticality measuring tool of the present invention may include something that facilitates close fixation. For this purpose, if the hollow rod-shaped body (1) is configured to have a right-angled part or a right-angled member that is perpendicular to the outer side of the rod-shaped body when viewed from the vertical direction on the side surface of the hollow rod-shaped body (1), it is possible to Close contact with objects can be easily achieved, and measurement accuracy can be improved. As shown in FIG. 2, this right angle may be formed by recessing the side surface of the hollow rod itself. Alternatively, as shown in FIG. 1, a right angle member (5) may be attached to the side surface of the hollow rod. In this case, it may be provided from the lower end to the upper end of the side surface of the hollow rod-shaped body, or it may be provided partially.If it is provided partially, for example, only at the upper end, or at two locations, the upper end and the lower end. One possible option is to provide a The verticality measuring device of the present invention includes:
It is preferable to have a fixture for fixing to the object to be measured, and a magnet can be used as the fixture. The magnet may be attached to the side surface of the hollow rod-shaped body, or may be embedded inside the right-angled portion or right-angled member. In this case, if the first object to be measured is made of metal such as iron, it is possible to easily fix the upward swing. or as a fixture - or two or more strips (6)
, a string-like material can be attached so as to wrap around a part of the outside of the hollow cup-shaped body (1). In this case, it is particularly preferable that at least both ends of the band-shaped object (band-shaped fixing tool) be constructed with a fastener (trade name: Fuji-2 Kusner, Pu, or Mazzink Tape) provided with a hooking member, since it is easy to attach and detach. The fixture may be used alone, but the right angle part or right angle member (
It is also preferable to use it in combination with 5) because it further facilitates close fixation.

(Effects of the Invention) The verticality measuring device of the present invention, the up-swing, uses buoyancy, so it does not take time for the float to stop. It is surrounded by the body and is completely unaffected by the wind, making it possible to accurately measure verticality.

Furthermore, since the verticality measuring tool of the present invention allows verticality to be observed from above, measurement is easy and accurate. This improvement in accuracy is achieved by attaching a transparent plate to the upper end of the hollow rod that clearly indicates the point through which a vertical line drawn from a point in the center of the bottom should pass, and then attaching a transparent plate to the upper end of the hollow rod, which clearly indicates the point through which the vertical line drawn from the center of the bottom should pass. This can be realized by configuring the contrast circuit section. This configuration has the advantage that verticality can be measured simultaneously in two directions: the front-rear direction and the left-right direction. If you want to use a traditional plumb bob.

Verticality was evaluated by looking at the overlap between the plumb-bob string and a straight line drawn on an object to be measured, such as a pillar, so verticality could only be seen in one direction at a time. Therefore, if you wanted to measure in two directions at the same time, you had to use two plumb bobbins along two sides of a pillar, etc. In this case as well, if adjustments were made in one direction, the other direction would move, which was a very difficult task, especially when the work was done by a single person.

In the case of the above aspect of the present invention, such problems can be solved. Adding a scale to the above transparent plate improves the ease and accuracy of measurement. Furthermore, in combination with a convex lens, the ease and accuracy of measurement is further improved.

If the hollow rod-shaped body is made to have an expandable structure, it is convenient to carry.

By providing a right-angled portion or a right-angled member on the side surface of the hollow rod-shaped body, it is possible to facilitate the close contact of the present verticality measuring tool to an object to be measured, such as a column having a right angle.

Providing a fixing device such as a magnet or a fit-shaped body on the side surface of the hollow rod-shaped body facilitates close fixation to the object to be measured.

If the band-like body has a structure having a fastener with a hook member, it can be easily attached and detached.

At least when the hollow rod-shaped body is filled with liquid during use, the buoyancy acting on the float increases, and M constant speed and accuracy can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing an example of the verticality measuring tool of the present invention. FIG. 2 is a perspective view showing a hollow rod-like body in which a right-angled portion is provided inside. ■・Contest - Hollow rod-shaped body 2... Linear body 3 - Float 4e - Transparent plate 5... Right angle member 6 - Band-shaped fixture 7... - One point in the center of the bottom

Claims (1)

[Scope of Claims] 1. A hollow rod-shaped body (1) having a bottom surface, a linear body (2) with one end fixed to a point on the bottom surface, and a float (3) attached to the other end of the linear body. ) and a verticality measuring device. 2. The verticality measuring instrument according to claim 1, wherein the hollow rod-shaped body (1) has an expandable structure. 3. The verticality measuring device according to claim 1, wherein the float (3) is clearly marked with a point or line through which a vertical line from one point on the bottom surface of the hollow rod-shaped body (1) passes. 4. The point through which the vertical line clearly marked on the float (3) passes is clearly marked in a position visible from above, and when the hollow rod-like body is vertically erected at the upper end of the hollow rod-like body (1), 4. A verticality measuring device according to claim 3, comprising a substantially transparent plate (4) which indicates the point through which a vertical line erected from a point on the bottom surface should pass. 5. The verticality measuring tool according to claim 4, wherein the transparent plate (4) has a scale. 6. Claim 4 in which the transparent plate (4) is a convex lens or has a convex lens above or below the transparent plate
The verticality measuring device according to item 1 or 5. 7. Any one of claims 1 to 6, wherein the hollow rod-like body (1) has a right-angled portion or a right-angled member that is perpendicular to the outer side of the hollow rod-like body when viewed from the vertical direction on the side surface of the hollow rod-like body (1). The verticality measuring device described in . 8. The verticality measuring tool according to any one of claims 1 to 7, which has a fixture for fixing the hollow rod-shaped body (1) to the object to be measured. 9. The verticality measuring device according to claim 8, wherein the fixture is a band-shaped body having a fastener provided with a hooking member. 10. The verticality measuring device according to claim 8, wherein the fixture is a magnet. 11. At least a float (3) in the hollow rod (1)
The verticality measuring device according to any one of claims 1 or 3 to 10, which contains a liquid that exerts a buoyant force on the verticality measuring device.