JP4953681B2 - Track angle measuring instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a railroad angle measuring apparatus of a simple structure, inexpensive, and measuring the railroad angle accurately with easy operation. <P>SOLUTION: The railroad angle measuring apparatus 10 comprises a substrate, constituted by a rectangular base plate 11 and sub-plate 16 connected openably/closably, an azimuth magnetic needle 12 disposed in one surface (measuring surface) of a base plate 11, an angle display member 13 disposed on the measuring surface of the base plate 11 to rotate coaxially with the rotation center of the azimuth magnetic needle 12, a level 14 disposed on the measuring surface of the base plate 11, a mirror body 15 disposed on the measuring surface of the base plate 11, and a cylindrical body 17 disposed on the side of the free end side of the sub-plate 16. The mirror body 15 or cylindrical body 17 is used for arranging the base plate 11 at a specific position with respect to the wire during measurement. The railroad angle is measured, depending on the angle of the angle scale of the angle display member 13 indicated by the azimuth magnetic needle 12. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention is to measure a line angle formed by an electric wire stretched between adjacent first and second electric poles and an electric wire stretched between the second and third electric poles. The present invention relates to a line angle measuring device.

  In the overhead wire wiring work, it is necessary to measure the line angle formed by the electric wire stretched between the three power poles. FIG. 13 is used to explain the meaning of the line angle, and is stretched between the electric wire stretched between the adjacent first power pole and the second power pole, and between the second power pole and the third power pole. It is the schematic plan view which looked at the electric wire from the upper part. In this figure, an electric wire L1 corresponding to one section of the electric wire L is stretched between the arm metal B1 attached to the first electric pole A1 and the arm metal B2 attached to the second electric pole A2. An electric wire L2 corresponding to a section of the electric wire L is stretched between the arm metal B2 attached to the second electric pole A2 and the arm metal B3 attached to the third electric pole A3. The angle θ formed by the straight line a1 extending in the extending direction of the electric wire L1 and the straight line a2 extending in the extending direction of the electric wire L2 is the “line angle”, and a new electric pole and electric wire are provided or an additional electric wire is shared with an existing electric wire. When erected, the type of arm metal and the wire support method are selected according to the track angle θ (distribution line construction standard). The angle θ ′ formed by the line a1 ′ connecting the first power pole A1 and the second power pole A2 and the line a2 ′ connecting the second power pole A2 and the third power pole A3 is also substantially the same as the line angle θ. The angle θ ′ can also be considered as the line angle.

  This line angle can be calculated by measuring the distance between the three utility poles shown in FIG. 13 with a laser distance meter or the like.

  Japanese Laid-Open Patent Publication No. 4-142419 (Patent Document 1) proposes a horizontal / vertical degree measuring instrument shown in FIG. 14 that can be used for measuring the line angle. This measuring instrument is a case in which a vertical indicator piece provided with a pointer (31a) and a weight (31b) rotatably supported by a shaft (31c) is attached with an angle scale (32a) about the shaft (31c) ( 32), linear rulers (33, 34), which are respectively accommodated in the longitudinal direction and drawn through the base line (33a, 34a) passing through the axis (31c), are placed on both sides of the case (32) and one is placed on the case (32). The other is fixedly attached around the shaft (31c). When measuring the line angle, an observer stands at a position in the vicinity of the second power pole A2 in FIG. 13 and sets the center base line (33a, 34a) of the straight ruler (33, 34) from the second power pole A2. Visually match the electric wires L1 and L2 extending to the first electric pole A1 and the third electric pole A3, and determine the angle formed by the central base line (33a, 34a) from the angle scale (32a), and determine the line angle. calculate.

JP-A-4-142419

  However, since the laser distance meter described above is a precision instrument, it is very expensive (millions of yen) and requires experience in its operation, and is not suitable as a device for measuring the line angle described above. is there.

  Furthermore, when using the measuring device of patent document 1, the observer standing on the ground away from the electric wire attachment position of the utility pole uses the central base line (33a, 34a) of the straight ruler (33, 34) as the electric wires L1, L2. It is difficult to visually match the extension direction of the line, and therefore the line angle cannot be measured accurately.

  In view of the above circumstances, an object of the present invention is to provide a line angle measuring device that is simple and inexpensive and that can accurately measure the line angle with a simple operation.

The above-mentioned purpose is to measure the line angle formed by the electric wire stretched between the adjacent first power pole and the second power pole and the wire stretched between the second power pole and the third power pole. A base plate having a measurement surface arranged upward at the time of measurement , and connected to the base plate so as to be able to open and close by rotating around a hinge axis by a hinge mechanism. Is provided on the measurement surface of the base plate, and a subplate to which a confirmation sheet on which matters necessary for advancing the overhead wire wiring work can be attached based on the measured line angle is measured. It arranged the angular scale has graduated concentrically, and an angle display member adapted to rotate with respect to the center point of the concentric circles is provided in the measurement surface of the base plate, before The center of the concentric circles and the center of rotation, the compass for indicating the angle scale of the angle indicator member provided on the base plate, and a reference line for alignment of the base plate, at the time of measurement At least one positioning means for arranging the base plate so that a horizontal angle between the reference line and the electric wire has a constant value, and the positioning means is a scope-shaped cylinder, An objective side cylindrical body fixed to the sub-plate, an eyepiece side cylindrical body connected to the objective side cylindrical body so as to be rotatable in a direction perpendicular to a measurement surface of the base plate, and the objective When the eyepiece cylinder provided in at least one of the side cylinder and the eyepiece cylinder is rotated by a predetermined angle in a direction perpendicular to the measurement surface of the base plate, A reflecting member or a refracting member for making it visible from the eyepiece of the cylinder, and the reference line is the axis of the objective cylinder, and one of the utility poles between adjacent utility poles at the time of measurement By looking through the eyepiece-side cylinder at a nearby position and aiming at the other power pole, the axis of the objective-side cylinder is arranged in parallel with the straight line connecting the power poles, so that between the reference line and the electric wire or the power pole This is achieved by a line angle measuring device characterized in that the base plate is arranged at a position where the horizontal angle between the horizontal straight line and the horizontal straight line is 0 ° .

In the present invention, the term “horizontal angle between the reference line and the electric wire” means that the line angle measuring device of the present invention is positioned below the electric wire, the measurement surface of the base plate is directed upward, and the angle scale of the angle display member is It means an angle formed between a reference line and an electric wire (a straight line extending in the direction of extension) that are recognized when the reference line and the electric wire are looked straight down from above the electric wire. In the line angle measuring instrument of the present invention, the base plate is arranged by the positioning means so that the horizontal angle between the reference line and the electric wire becomes a predetermined value (for example, 0 °) during measurement.

Further, in the present invention, the term “angle scale arranged substantially horizontally at the time of measurement” may be such that the angle scale may be arranged completely horizontally at the time of measurement and does not prevent free rotation of the compass. That is, it may be arranged slightly inclined with respect to the horizontal plane. However, in order to perform high-accuracy measurement, it is preferable that the angle graduation be arranged completely horizontally at the time of measurement, and for this reason, the angle graduation of the angle display member at the time of measurement is arranged horizontally on the measurement surface of the base plate. It is preferable that a spirit level is provided for ensuring the arrangement.

  It is sufficient that a numerical value indicating 0 ° to 180 ° is attached to the angle scale of the angle display member, and an angular numerical value from 0 ° to 180 ° is attached symmetrically with respect to the 0 ° -180 ° line. It is common to be done. Note that a character “N” indicating north may be attached instead of a character “0”, and a character “S” indicating south may be attached instead of a character “180”. Good.

In the present invention, the measurement surface of the base plate is directed upward at the time of measurement, the angle graduation of the angle display member is arranged substantially horizontally, and the above reference line and FIG. 13 are used by using positioning means having a reference line for alignment of the base plate . When the base plate is arranged so that the horizontal angle between the first electric wire L1 (or the horizontal straight line connecting the first electric pole A1 and the second electric pole A2) becomes a predetermined constant value, the base plate The azimuth magnetic needle provided on the measurement surface rotates and the tip of the pointer points to the NS pole. In this state, the angle display member provided so as to be rotatable on the measurement surface of the base plate is rotated so that the tip of the pointer and the angle scale are 0 ° and 180 ° (or “N” and “S” characters). And match. Similarly, using the positioning means, the horizontal angle between the reference line and the second electric wire L2 in FIG. 13 (or the horizontal straight line connecting the second electric pole A2 and the third electric pole A3) is the above-mentioned. The line angle is measured by arranging the base plate so as to have a constant value of and reading the angle on the angle scale pointed by the pointer of the compass.

The shape of the base plate is not particularly limited as long as it has a measurement surface arranged upward at the time of measurement. For example, a single plate made of non-magnetic resin, wood material, light metal, or the like Can be used. A sub plate is connected to the base plate so that it can be opened and closed by being rotated about a hinge axis by a hinge mechanism, and a surface facing the sub plate of the base plate is used as a measurement surface . The sub-plate can serve as a lid that protects the measurement surface of the base plate .

The angle display member is not particularly limited in its shape as long as the angle scale arranged substantially horizontally at the time of measurement is graduated on a concentric circle and rotates with respect to the center point of the concentric circle. For example, an annular recess may be provided in the measurement surface of the base plate , and a ring-shaped angle display member may be rotatably accommodated in this recess, and an angle display member in the shape of an all-round protractor is installed on the measurement surface of the base plate However, the angle display member is formed as a flat cylindrical hollow body having a transparent top surface, and the azimuth magnetic needle is inserted into the hollow body. When transparent oil is sealed and the angle scale is graduated on the bottom or top surface of the hollow body, the wobbling of the compass is suppressed due to the resistance of the oil, so stable and highly accurate measurement is performed. be able to.

  Further, by rotating the angle display member on a line connecting 0 ° and 180 ° of the angle scale on the bottom surface of the angle display member having the shape of a full circle protractor or the hollow body angle display member, the azimuth needle causes the NS pole to rotate. When an angle base line (for example, an angle base line of an arrow symbol) for aligning the tip of the pointer when facing and 0 ° and 180 ° of the angle scale is provided, 0 ° and 180 of the pointer tip and the angle scale are provided. The operation of aligning the angle (or the letters “N” and “S”) is accomplished by a simple operation of superimposing the azimuth magnetic needle and the angle base line, so that the operation becomes easy.

As the positioning means, a flat mirror disposed on the measurement surface of the base plate can be used. However, a straight line acting as a reference line for alignment of the base plate is provided on the mirror body, for example, by printing or pasting. The base plate is positioned at a position where the horizontal angle between the reference line and the electric wire becomes 0 ° by projecting a mirror image of the electric wire positioned above on the mirror body and superimposing the mirror image with a straight line as a reference line at the time of measurement. Will be placed. The positioning means as a mirror is preferably used when a signboard or a bag existing between adjacent utility poles obstructs and the other utility pole cannot be seen from one utility pole.

Further, a scope-like cylinder attached to the sub plate can be used as the positioning means. In this case, the reference line for alignment of the base plate during measurement corresponds to the axis of the cylinder. By peeking at the cylinder from the position near one utility pole between adjacent utility poles at the time of measurement, aiming at the other utility pole, and arranging the axis of the cylinder parallel to a horizontal straight line connecting the utility poles The base plate is disposed at a position where the horizontal angle between the reference line and the electric wire is 0 °. The positioning means as a cylindrical body is suitably used to measure the line angle of an electric wire to be wired in the future when the electric pole and the electric wire are newly installed and the electric wire is not yet stretched between the electric poles. .

The cylindrical body may be composed of a single tubular body, but the objective side cylindrical body fixed to the sub plate , and the objective side cylindrical body can be rotated in a direction perpendicular to the measurement surface of the base plate. The eyepiece-side cylinders connected in this way, and the eyepiece-side cylinders provided in at least one of the objective-side cylinders and the eyepiece-side cylinders were rotated in a direction perpendicular to the measurement surface of the base plate It is sometimes desirable to construct a cylindrical body provided with a reflecting member or a refracting member so that an electric pole image can be seen from the eyepiece portion of the eyepiece side cylindrical body. In this embodiment, the reference line corresponds to the axis of the objective side cylinder fixed to the sub plate . The observer rotates the eyepiece-side cylinder in a direction perpendicular to the measurement surface of the base plate , then looks at the eyepiece-side cylinder with one eye and focuses on the power pole while measuring the baseplate with the other eye Since the angle scale and the azimuth magnetic needle provided on the surface can be seen, the measurement can be performed easily and quickly. In addition, if an index for aiming at the utility pole is provided at one end of the cylindrical body, it is easier to aim at the utility pole, and further, to protect the eyes of the observer on the eyepiece of the tubular body If the pad is provided, the line angle can be measured safely.

  In this invention, you may have 2 or more types of positioning means, for example, you may provide both the above-mentioned mirror body and a cylinder.

The arrangement position of the positioning means in the base plate is selected within a range that does not hinder the measurement of the line angle. For example, the mirror body as the positioning means may be affixed to the entire region other than the region where the angle display member on the measurement surface of the base plate and the level when present exist. At this time, if the reference line on the mirror passes through the center of rotation of the azimuth magnetic needle and is provided as a straight line passing through the level, the operation of aligning the base plate and rotating the angle display member during measurement is performed. It is preferable because it is easy to perform simultaneously. In addition, for example, when the base plate is formed of a rectangular plate , the cylindrical body as the positioning means may be provided on one side of the rectangular plate, and the sub plate is opened and closed via the hinge mechanism on the base plate. when connected as possible, it may be provided on the free end side of the side of the sub-plate which functions as a lid. In this case, the line angle can be stably measured by providing the base plate and / or the sub plate with posture fixing means for fixing the angle between the base plate and the sub plate at the time of measurement to a predetermined angle, preferably vertical. In addition, if an opening prevention means for maintaining the closed state is provided in the base plate and / or the sub-plate, unnecessary opening of the line angle measuring device when not in use can be prevented.

If a holder for fixing the leg that supports the base plate is provided on the surface that is arranged downward when measuring the base plate , the base plate may be held on a leg such as a tripod. This is preferable because it is possible. At this time, the horizontal state of the base plate can be adjusted by providing a ball joint-type angle variable mechanism in any one of the leg fixing holder, the leg fixing holder and the leg connecting portion, and the leg. .

Further, the line angle measuring apparatus of this invention is to be used for the selection of the type and the wire supporting method cross-arm, ensure that the relationship between the line angle and arm-type or electrical-wire support method to the sub-plate is filled It is preferable that the sheet is attached because it is possible to continue the overhead wire wiring work by selecting the arm bracket type or the wire support method according to the description on the confirmation sheet after measuring the track angle.

  The line angle measuring device of the present invention has a simple configuration and can be manufactured at low cost, and the angle measuring device of the present invention can measure the line angle with a simple operation with high accuracy.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1A is a perspective view showing an open state of a line angle measuring instrument in one embodiment of the present invention, FIG. 1B is a perspective view showing a closed state, and FIG. 2 is a front view showing the open state, FIG. 3 is a side view showing the opened state, and FIG. 4 is a cross-sectional view of the base plate .

1 to 4, the track angle measuring device 10 includes a base plate 11 and a sub plate 16 that are connected to each other so as to be opened and closed by rotating around a hinge axis by a hinge mechanism (not shown). Further, the line angle measuring instrument 10 is arranged on the measurement surface of the base plate 11 so as to rotate coaxially with the rotation center of the orientation magnetic needle 12 and the orientation magnetic needle 12 provided on the subplate facing surface (measurement surface) of the base plate 11. The provided angle display member 13, the level 14 provided on the measurement surface of the base plate 11, the mirror body 15 as positioning means provided on the measurement surface of the base plate 11, and the side on the free end side of the subplate 16 Is provided with a cylindrical body 17 as another positioning means.

  The base plate 11 and the sub-plate 16 are formed of a rectangular thick plate material such as a non-magnetic woody material, resin, or light metal. The measurement surface of the base plate 11 is flat, and concave portions 11a and 11b for accommodating the angle display member 13 and the level 14 are formed on the measurement surface.

  A fixing member 24 straddling both sides of the base plate 11 and the sub plate 16 is attached. The fixing member 24 is composed of three non-magnetic metal plate members 24a, 24b, and 24c. One end of the plate member 24a is connected to the sub-plate 16 so as to be rotatable by a pin 24d, and One ends of the plate members 24b and 24c are connected to the base plate 11 so as to be rotatable by pins 24e. Furthermore, the other end of the plate member 24a is connected to the other end of the plate member 24b, 24c by using a pin 24f so as to be sandwiched by the plate member 24b, 24c with a relatively strong force. Although it can be rotated with respect to the plate members 24b and 24c, it does not rotate naturally. In the present embodiment, as shown in FIG. 1A, when the base plate 11 and the sub plate 16 are opened and the plate members 24a, 24b, and 24c are linearly arranged, the angle formed by the base plate 11 and the sub plate 16 is about Maintained at 90 °. Therefore, in the present embodiment, the fixing member 24 functions as a posture fixing means. Further, as shown in FIG. 1B, in the closed state, the plate members 24a, 24b, and 24c are bent in a dogleg shape, and the closed state is maintained. Accordingly, the fixing member 24 also functions as an opening prevention means.

  The azimuth needle 12 is a known one that can point to the north pole (north), and is inserted into the angle display member 13 in the shape of a flat cylindrical hollow body having a transparent top surface. Yes. The angle display member 13 is accommodated in the recess 11a so that the angle display member 13 can rotate around the shaft 13a and the measurement surface of the base plate 11 and the circular bottom surface 13b of the angle display member 13 are parallel to each other. The axis 13 a is also the center of rotation of the azimuth magnetic needle 12. Transparent oil is enclosed inside the angle display member 13 so that the wobbling of the compass 12 is suppressed.

  On the circular bottom surface 13b of the angle display member 13, an angle scale 13c that is visible through a transparent top surface is concentrically attached. This angle scale is inscribed at every 1 °, and different inscriptions are given in units of 5 ° and 10 °. In addition, the letter “N” indicating the N pole (the numeral “0” may be used) and the number “180” in 20 ° units from the letter “N” indicating the N pole are N (0 °) −. It is carved symmetrically with respect to the 180 ° line. In addition, on the bottom surface 13b of the angle display member 13, an angle base line 13d composed of an arrow symbol having a tip directed in the N-pole direction is provided on the N (0 °) -180 ° line.

  The level 14 indicates that the base plate 11 (and hence the angle scale 13c of the bottom surface 13b of the angle display member 13) is horizontal when a water bubble is located at the center thereof. Yes.

  The mirror body 15 is provided such that the angle display member 13 and the level 14 are exposed on the measurement surface of the base plate 11, and a mirror body 15 having a high reflection efficiency such as a sheet-like mirror, a glass-like mirror, or a metal thin film coating mirror is used. in use. Further, a reference line 15 a is provided on the surface of the mirror body 15, which is located on a straight line that extends over the angle display member 13 and the level 14 and passes through the center of rotation of the azimuth magnetic needle 12.

  On the free end side of the sub-plate 16, a scope-shaped cylinder 17 made of a nonmagnetic resin, metal, or the like is provided. In the present embodiment, the cylindrical body 17 is divided into two parts, an eyepiece side cylindrical body 17A and an objective side cylindrical body 17B. As shown below, the objective side cylinder 17B is fixed to the sub-plate 16, and the eyepiece side cylinder 17A is provided so as to rotate in a direction perpendicular to the bottom surface of the angle display member 13. FIG. 5 is an explanatory diagram of a main part of the cylindrical body 17.

  The eyepiece-side cylinder 17A and the objective-side cylinder 17B are both square in cross section and have a hollow shape, and a semicircular protrusion is provided on the side surface on one end side. The distance between the side surfaces of the eyepiece-side cylinder 17A is set slightly smaller than the distance between the side surfaces of the objective-side cylinder 17B, and the semicircular protrusion of the eyepiece-side cylinder 17A is in the objective-side cylinder 17B. It can be inserted without gaps. And the hole for receiving the axis | shaft 17d mentioned later is provided in the protrusion part of each cylinder 17A, 17B. Further, a pad 18 made of an elastic material is provided at the other end of the eyepiece-side cylinder 17A and an observer attaches the eye E and protects the eye E. The transparent body 19 is provided. The transparent body 19 is provided with a cross-shaped index by printing so that the aiming to the utility pole can be performed more easily and precisely. At a position excluding both ends of the shaft 17d, a mirror body 17C as a reflecting member to be accommodated in the cylindrical body 17 is fixed. Both ends of the shaft 17d are inserted into the holes of the protrusions of the eyepiece side cylinder 17A so that the mirror surface of the mirror body 17C faces the transparent body 19, and further inserted into the holes of the protrusions of the object side cylinder 17B. After that, the end of the shaft 17d is fixed to the objective cylinder 17B. Therefore, the mirror surface of the mirror body 17C is fixed at a constant angle with respect to the bottom surface of the objective side cylinder body 17B.

  Further, a cylindrical body angle holding member 25 having the same configuration as the above-described fixing member 24 is provided between the eyepiece side cylindrical body 17 </ b> A and the sub plate 16. As shown in FIG. 5, the cylindrical body angle holding member 25 has an objective when the cylindrical body angle holding member 25 extends linearly and rotates the eyepiece side cylindrical body 17A to a position where it no longer rotates. The length is set such that the angle formed by the axis of the side cylinder 17B and the axis of the eyepiece side cylinder 17A is twice the angle formed by the mirror surface of the mirror 17C and the bottom surface of the objective cylinder 17B. With this configuration, when the observer rotates the eyepiece-side cylinder 17A in a direction perpendicular to the bottom surface of the angle display member 13 and puts his eyes on the butt 18 of the eyepiece-side cylinder 17A, the electric pole image Can be seen from the eyepiece part of the eyepiece side cylinder 17A. Therefore, for example, the left eye can look into the eyepiece-side cylinder 17A and aim at the power pole, and the right eye can see the angle display member 13 and the level 14.

  On the other hand, on the front and back of the sub-plate 16, confirmation sheets 20, 21, 22, and 23 on which matters necessary for the observer to proceed with the overhead wire wiring work based on the measured line angle are affixed. .

  FIGS. 6 to 9 show, as an example, confirmation sheets 20 to 23 in which the relationship between the line angle based on the distribution line construction standards, the type of armature, and the wire support method are entered. The confirmation sheets 20 to 23 show the relationship between the wire support segment for each line angle, the wire size (existing ACSR-based wire track), the number of strips, and the decoration segment (FIGS. 6 and 7) in the arm bracket use category. ) And the relationship (FIGS. 8 and 9) with the size of the wire line (existing ACSR system) to be used with respect to the line angle when the overhead power transmission line in the insulator use section is the wire type.

  Next, a line angle measuring method using the line angle measuring instrument 10 according to an embodiment of the present invention will be described with reference to FIGS. 10 and 11. Note that symbols in FIG. 10 corresponding to the symbols in FIG. 13 have the same meaning as the symbols in FIG.

  In the above configuration, the observer first stands under the electric wire L1 between the utility pole A1 and the utility pole A2 as the first step, and faces the utility pole A2 side with the utility pole A1 as the back. In this state, the level 14 is confirmed and the electric wire L1 reflected on the mirror body 15 and the reference line 15a are made to coincide with each other while keeping the base plate 11 (and therefore the angle scale 13c of the bottom surface 13b of the angle display member 13) horizontal.

  When the electric wire L1 reflected in the mirror body 15 and the reference line 15a match, as shown in FIG. 11A, an angle display is made so that the angle scale “N” coincides with the N pole side of the azimuth magnetic needle 12 at this time. The member 13 is rotated. This operation can be quickly performed by superimposing the azimuth magnetic needle 12 and the angle base line 13d.

  Next, as a second step, the observer stands below the electric wire L2 between the utility pole A2 and the utility pole A3, and faces the utility pole A3 side with the utility pole A2 as the back. In this state, the level 14 is confirmed, and the electric wire L2 reflected in the mirror body 15 and the reference line 15a are made to coincide with each other while keeping the base plate 11 (and thus the angle scale 13c of the bottom surface 13b of the angle display member 13) horizontal.

  When the electric wire L2 reflected on the mirror body 15 and the reference line 15a coincide with each other, as shown in FIG. 11B, the angle of the angle scale 13c indicated by the tip on the N pole side of the azimuth magnetic needle 12 at this time is read. At this time, since the tip of the angle base line 13d of the arrow symbol faces the “N” -shaped direction of the angle scale, the position of the “N” -shaped can be easily confirmed.

  FIG. 10 shows the bottom surface 13b of the angle display member 13 and the azimuth magnetic needle 12 in the first step and the second step on the electric wires L1 and L2. In either step, the N pole side of the compass 12 is oriented in the same direction, and therefore the angle (N (0 °)) of the angle scale 13c after the angle display member 13 is rotated in the first step and the second step. The difference in the angle pointed to the N pole side of the azimuth magnetic needle 12 in FIG. 5, that is, the value of the angle pointed to the N pole side of the directional magnetic needle 12 in the second step represents the line angle θ.

  The angle display member 13 may be rotated so that the angle scale “180” coincides with the N pole side of the azimuth magnetic needle 12.

  Further, the line angle can also be measured using the cylindrical body 17. In this case, as a first step, the observer stands between the utility pole A1 and the utility pole A2, and faces the utility pole A2 side with the utility pole A1 as the back from the immediate vicinity of the utility pole A1. In this state, while checking the level 14 and keeping the base plate 11 horizontal, the eyepiece side cylinder 17A of the cylinder 17 is rotated to a position where it no longer rotates in the direction perpendicular to the bottom surface of the angle display member 13. Then, put the eye on the pad 18 of the eyepiece side cylinder 17A and look into the cylinder, aim at the utility pole A2 using the cross-shaped index of the transparent body 19 provided on the objective side cylinder 17B, and the objective side cylinder The direction of the axis of 17B is aligned with the direction of the line a1 ′ connecting the utility poles A1 and A2. When the aiming to the utility pole A2 is completed, the angle display member 13 is rotated so that the angle scale “N” coincides with the N pole side of the compass 12 at this time.

  Next, as a second step, the observer stands between the utility pole A2 and the utility pole A3, and faces the utility pole A3 side from the immediate vicinity of the utility pole A2 with the utility pole A2 as the back. From this state, the level indicator 14 is checked, the base plate 11 is kept horizontal, the eyepiece side cylinder body 17A is looked into and the power pole A3 is aimed, and the axis of the objective side cylinder body 17B is connected to the power poles A2 and A3. Align with the direction of a2 ′. When the aiming to the utility pole A3 is completed, the angle of the angle scale 13c indicated by the tip of the N pole side of the azimuth magnetic needle 12 at this time is read to identify the line angle θ.

  In the above-described steps, the first step and the second step do not have to be performed using the same positioning means (the mirror body 15 and the cylinder body 17), and either the mirror body 15 or the cylinder body 17 is used in each process. May be used. For example, when a power pole cannot be looked into from the cylindrical body 17 because a billboard or a fence protrudes between the electrical poles, the mirror body 15 is used. When the electric wire does not exist yet, the cylindrical body 17 is used. Is done.

  If the track angle θ can be identified, for example, the environment of whether it is a salt-resistant area (coastal area) or the difference between a high-voltage cable or a low-voltage cable can be identified in advance. Can be identified.

Although one embodiment of the present invention has been described below, the present invention is not limited to this embodiment, and can be modified within the scope of the present invention . For example, one of a mirror body and a cylindrical body may be provided as positioning means, but it is more convenient to have both. Further , the hinge mechanism capable of opening and closing the base plate and the sub plate may be a thin hinge in which the base plate and the sub plate are integrally formed, or a so-called hinge connection.

Further, the cylindrical body may be provided on at least sides of the body object side tube body and an eyepiece side cylindrical refraction member in place of the mirror member as reflecting member. It is also possible to provide an eyepiece on the eyepiece side of the cylinder and an objective lens on the objective side of the cylinder to set a constant optical magnification (for example, 2 times). Furthermore, it is also possible to adopt a zoom system in which the cylindrical body can be expanded and contracted with these lenses and the optical magnification can be changed.

  Further, as shown in FIG. 12, a level 14 is provided in the concave portion 11b of the measurement surface of the base plate 11, an azimuth magnetic needle 12 and an angle display member 13 are provided in the concave portion 11a, a mirror body 15 is further provided, and a measurement surface is further provided. A leg fixing holder 26 that engages with a tip (eg, a ball joint-type ball portion) 27 such as a tripod is provided on the rear surface of the base plate 11 so that the base plate 11 is held on the leg such as a tripod to improve workability. It is also possible. In this case, when the cylinder is used, the operability is further improved by using the above-described split type cylinder. Further, in the above-described example, the ball joint method is disclosed for the leg fixing holder 26 and its connecting portion. However, the leg fixing holder is divided into two parts, and the ball joint type angle variable mechanism is provided therebetween. It may be provided, or a tripod itself may be provided with a ball joint system or a two-dimensional combination angle variable mechanism.

1A and 1B show a line angle measuring device according to an embodiment of the present invention, in which FIG. 1A is a perspective view of a line angle measuring device in an open state, and FIG. 1B is a perspective view of a line angle measuring device in a closed state. . It is a front view of the track angle measuring device which concerns on embodiment shown in FIG. It is a side view of the track angle measuring device which concerns on embodiment shown in FIG. It is sectional drawing of the baseplate used for the track angle measuring device which concerns on embodiment shown in FIG. It is explanatory drawing of the principal part of the cylinder used for the track angle measuring device which concerns on embodiment shown in FIG. It is explanatory drawing of the confirmation sheet | seat used for the track angle measuring device which concerns on embodiment shown in FIG. It is explanatory drawing of the confirmation sheet | seat used for the track angle measuring device which concerns on embodiment shown in FIG. It is explanatory drawing of the confirmation sheet | seat used for the track angle measuring device which concerns on embodiment shown in FIG. It is explanatory drawing of the confirmation sheet | seat used for the track angle measuring device which concerns on embodiment shown in FIG. It is explanatory drawing of the track angle measurement procedure using the track angle measuring device which concerns on embodiment shown in FIG. FIG. 1 shows a relationship between an azimuth magnetic needle and an angle scale at the time of line angle measurement using the line angle measuring device according to the embodiment shown in FIG. 1, and (A) is stretched between the first power pole and the second power pole. The front view of the principal part at the time of the track confirmation of an electric wire, (B) is a front view of the principal part at the time of the track confirmation of the electric wire stretched between the 2nd utility pole and the 3rd utility pole. It is sectional drawing of the baseplate of the track angle measuring device which concerns on another embodiment of this invention. It is the schematic top view which looked at the adjacent utility pole and the electric wire stretched between them from upper direction. It is the schematic which shows the conventional angle measuring device.

A1, A2, A3 Utility poles B1, B2, B3 Arm metal L, L1, L2 Electric wire 10 Line angle measuring instrument 11 Base plate 12 Azimuth magnetic needle 13 Angle display member 14 Level 15 Mirror 16 Subplate 17 Tubular 17A Eyepiece side cylinder 17B Objective side cylindrical body 17C Mirror body (reflective member)
18 Pad 19 Transparent body 20-23 Confirmation sheet 24 Fixing member (Attitude fixing means, Opening prevention means)
25 Cylindrical angle holding member 26 Leg holder

Claims (3)

Line angle measurement for measuring the line angle formed between the electric wire stretched between the adjacent first and second power poles and the wire stretched between the second and third power poles. A vessel,
A base plate with a measuring surface that is arranged facing upward during measurement ;
A confirmation sheet that is connected to the base plate so as to be openable and closable by rotating around a hinge axis by a hinge mechanism, and that describes the matters necessary for the observer to proceed with the overhead wire wiring work based on the measured line angle. An attachable sub-plate;
An angle display member provided on the measurement surface of the base plate, the angle scale arranged substantially horizontally at the time of measurement being scaled on a concentric circle, and rotating about the center point of the concentric circle;
A magnetic azimuth needle that is provided on the measurement surface of the base plate and has the center of the concentric circle as a rotation center to indicate an angle scale of the angle display member;
The base plate is provided on the base plate and has a reference line for alignment of the base plate , and the base plate is arranged so that a horizontal angle between the reference line and the electric wire becomes a constant value at the time of measurement. And at least one positioning means .
The positioning means is a scope-like cylinder;
An objective side cylindrical body fixed to the sub-plate, an eyepiece side cylindrical body connected to the objective side cylindrical body so as to be rotatable in a direction perpendicular to a measurement surface of the base plate, When the eyepiece cylinder provided in at least one of the objective cylinder and the eyepiece cylinder is rotated by a predetermined angle in a direction perpendicular to the measurement surface of the base plate, A reflecting member or a refracting member for making it visible from the eyepiece of the cylinder,
The reference line is the axis of the objective cylinder, and at the position near one electric pole between adjacent electric poles at the time of measurement, the eyepiece side cylinder is looked at and the other electric pole is aimed. The base plate is arranged at a position where the horizontal angle between the reference line and the electric wire or the straight line connecting the power poles becomes 0 ° by arranging the body axis parallel to the horizontal straight line connecting the power poles. A line angle measuring device characterized by the above . The line angle measuring device according to claim 1, wherein a level level is provided on a measurement surface of the base plate to ensure a horizontal arrangement of the angle scale of the angle display member at the time of measurement.   When the angle display member is rotated on a line connecting 0 ° and 180 ° of the angle scale of the angle display member, the tip of the pointer when the azimuth magnetic needle faces the NS pole, and 0 ° and 180 ° of the angle scale The line angle measuring device according to claim 1, further comprising an angle base line for matching the line angle with each other.

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