JPH0650756A - Multipurpose compass - Google Patents

Abstract

PURPOSE:To simply decide the pole position or the like of a steel tower without requiring a special knowledge or technique by a method wherein a compass is formed after an entire-circle protractor, an alidade and a square-arrangement recognition plate have been attached to a shaft in the central point. CONSTITUTION:By means of a stopper screw 10, the direction of an alidade 7 is set to a graduation O on an entire-circle protractor 3, and a pointer protrusion 4a on a square-arrangement recognition plate 5 is set to the graduation O on the protractor 3. The movement in the horizontal direction of an adjusting attachment is made free, and its horizontality is confirmed by a bubble level 11. By looking into a sighting hole in the alidade 7, its sighting is set to an already installed steel tower, the adjusting attachment is tightened and the protractor 3 is fixed. Then, by loosening a stopper screw 10 for the square- arrangement recognition plate 5, the sighting of the alidade 7 is set to a steel tower (or a mark on a place where a steel tower is to be constructed) at the rear. When the pointer protrusion 4a on the recognition plate 5 reads out an angle indicated on the protractor 3 and an angle is moved backwards by 1/2 of the angle, a square figure 6 indicated by the recognition plate 5 indicates the direction of the steel tower to be constructed.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention is to select routes to be carried out before the construction of steel towers and utility poles, measure the height of trees and works, make courts for various sports, construct warehouses and waterways, etc. It relates to a versatile compass that can be provided for use as a surveying instrument in civil engineering. What is a square layout recognition plate?
A square shape or a shape that allows the directions of the four corners of the square to be visually recognized directly is provided. For example, the disk is formed with pointer protrusions in eight directions at every 45 degrees. Inscribed polygon (square in this case)
The following is an explanation of the plate in which is written.

[0002]

2. Description of the Related Art Conventionally, a power transmission tower is a tower in which pillars are arranged at four corners of a square in plan view, and a large number of the towers are continuously connected by a high voltage line. When constructing one steel tower, the construction position is used as the starting point, and the opening angle of the line of sight connecting each of the front and rear steel towers is obtained from this starting point, and the direction of the bisector of the opening angle. However, there is a promise to construct it so that it will be in the middle of the facade surface (the surface that does not show the ridge angle) of the steel tower that is about to be constructed. We use surveying instruments and calculators to keep this promise.

[0003]

Determining the positions of the four pillars to obtain the above-mentioned installation conditions requires skill, and complicated calculations are repeated while using a surveying instrument and a calculator. Specifically, one of the four pillars as the first pillar,
The opening angle from one line of sight is calculated, then the opening angle of the second pillar is calculated, and then the positional relationship of each pillar is used as a reference such as the third pillar and the fourth pillar. The positional relationship that marks out from the sight line or point and finally the columns are arranged at the four corners of the square is obtained by repeating the four arithmetic calculations, but for this reason only, expensive and heavy surveying equipment and I had all the materials and brought them to the site.

[0004]

In order to eliminate the above-mentioned drawbacks, the present invention provides a versatile compass characterized in that a total protractor, an alidade and a square arrangement recognition plate are pivotally attached at a central point. It is what

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The multi-purpose compass according to the present invention is installed on a tripod mount (1) with a horizontal and vertical adjustment attachment (2) interposed. This multi-purpose compass is a disc that is smaller than the full protractor (3) and has a triangular pointer protrusion (4) around its edge on the full protractor (3) graduated from 0 to 360 degrees. A square arrangement recognition plate (5) having 8 directions formed at every 45 degrees is superposed. A square figure (6) inscribed on this square arrangement recognition plate (5) is marked. A circular plate (8) to which an alidade (7) is fixed is superposed on the square arrangement recognition plate (5), and the center point of each of the circular plate (3) and the square arrangement recognition plate (5). It is pivoted with a pin (9) that penetrates through. The three can rotate independently about this pin (9), but in order to prevent these rotations in some cases, the stopper screw (10) is provided with the square arrangement recognition plate (5) and the circular plate. It may be applied in the plane of (8). Further, the bubble level (11) may be installed in the plane of the circular plate (8).

This multi-purpose compass is used in such a manner that the direction from the collimation hole of the alidade (7) to the collimation thread is set to 0 on the scale of the full circle protractor (3), and the square arrangement recognition plate (5). Of the pointer projections (4), the orientation of the pointer projections (4a) that do not respond to the four corners of the square figure (6) is adjusted to 0 on the scale of the total protractor (3) (at this time, the alidade (7) and the square arrangement are recognized). Both the pointer protrusions (4a) of the plate (5) are aligned with the scale 0 of the total protractor (3)), and the temporary fixing in this state is provided by the square arrangement recognition plate (5) and the circular plate (8). By stopper screw (10). By tightening the stopper screw (10), the tip of the screw can be tentatively fixed by hitting the other surface on which it overlaps.

Next, the horizontal and vertical adjustment attachment (2) is freely moved in the horizontal direction, and the horizontal level is confirmed by the bubble level (11) in the plane of the circular plate (8). Next, look into the collimation hole of the alidade (7) and aim at the steel tower already built in front of the steel tower to be constructed. Then, tighten the screws of the horizontal and vertical orientation adjustment attachment (2) to fix the orientation of the total protractor (3) that has moved with the alidade (7). Next, the stopper screw (10) attached in the plane of the square arrangement recognition plate (5) is loosened so that the square arrangement recognition plate (5) and the total circle protractor (3) are locked by the stopper screw (10). After canceling, the collimation of the alidade (7) is adjusted to the tower (or the mark indicating the construction schedule) after the tower to be constructed. Here, the pointer protrusion (4a) of the square arrangement recognition plate (5), which is aligned with the direction from the collimation hole of the alidade (7) to the collimation yarn, reads the angle shown on the full protractor (3). Assuming that the read angle is 138 degrees, the pointer protrusion (4a) is moved back by 1/2 of this angle, that is, by 69 degrees. The square figure (6) shown by the square layout recognition plate (5) at the time of completing the backtracking operation indicates the direction of the steel tower to be constructed.
That is, it becomes clear that the legs of the steel tower should be arranged in the directions indicated by the four corners of the square figure (6).

A versatile compass on a tripod rack (1) can be used as a simple transit by vertically raising it by operating a horizontal and vertical adjustment attachment (2).

[0009]

As a result, the installation direction of the steel tower can be easily determined. Since the installation direction of the legs of the tower can be confirmed in an analog manner, it is possible to eliminate the complexity of obtaining the installation position of the legs by repeating the four arithmetic operations in a digital manner. Horizontal, vertical angle and height difference surveying can be done easily without requiring specialized knowledge or skills. The multi-purpose compass of the present invention has a diameter of about 21 cm and a weight of about 340 g, and is as light as about 1/27 in weight as compared to the transit, and it is extremely easy to bring to the site. It is convenient to move and carry, can be manufactured at low cost, and does not handle it like fear of damage or damage like expensive transits. Basic education in surveying becomes easy. It has a number of great effects that it can be used for indexing the positions of the four corners of a sports court and for temporary work in the field of construction.

[Brief description of drawings]

FIG. 1 is a plan view of the present invention.

FIG. 2 is a perspective view of the present invention.

FIG. 3 is a perspective view showing a usage state of the present invention.

[Explanation of symbols]

 1 Tripod mount 2 Horizontal and vertical angle adjustment attachment 3 Full circle protractor 4 Pointer protrusion 4a Pointer protrusion 5 Square arrangement recognition plate 6 Square figure 7 Alidade 8 Circular plate 9 Pin 10 Stopper screw 11 Bubble level

Claims (1)

[Claims] 1. A multi-purpose compass characterized in that an all-round protractor, an alidade, and a square arrangement recognition plate are pivotally attached at a central point.