JP2010038631A - Device and method for measurement of bending angle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and method for measurement of a bending angle of a wire, having a small working area, capable of measuring by a single operator, and measuring a bending angle accurately by a simple operation, and manufacturable inexpensively. <P>SOLUTION: The device includes a mirror 102, two linear indexes 104, 106 at least either of which can be rotated along the surface of the mirror 102, and an angle gage 108 capable of measuring a relative angle between the two linear indexes 104, 106. The wire 20 between both diameters of a telegraph pole 10 is reflected on the mirror 102, and the two linear indexes 104, 106 are allowed to agree respectively with the wire 20 between both diameters reflected on the mirror 102, to thereby show the bending angle of the wire 20 by the angle gage 108. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bending angle measuring device and a bending angle measuring method for measuring a bending angle of an electric wire stretched around a utility pole.

  Of the utility poles that make up the power distribution equipment, depending on the state of the extension of the wires, especially those that have a horizontal (bending) angle on the wires between the two diameters of the utility poles, those that are held by the utility poles Is called the end pillar. The span is between the utility poles, and the span is between the utility pole and the utility poles on both sides. In the utility pole, the tension of the electric wire is the largest load. For this reason, according to the “Technical Standards for Electrical Equipment (Ministry of Economy, Trade and Industry)”, the horizontal load of the electric wire is applied to the part (angular column) that forms a horizontal angle exceeding 5 ° in the electric wire path and the part (terminal column) that holds all overhead wires In order to withstand unbalanced loads, it is stipulated that a branch line be provided.

  The branch line is a wire made of steel wire, and the one that is stretched on other pillars in the horizontal direction is called the horizontal branch line, and the one that is stretched on the surrounding ground is called the ground branch line. In addition, it may replace with a branch line and may use a support | pillar. The pillar is installed so that another electric pole leans diagonally. The strut can receive both tensile and compressive forces, but the strut is thick, so the impact on the landscape is great. A branch line and a support | pillar are suitably selected from the viewpoint of ensuring the load which should be supported, and an installation location.

  Since the branch line is a steel wire, rust (corrosion) is produced over time, and the proof stress decreases. Especially in coastal facilities, sea erosion is severely eroded and the service life tends to decrease. If the branch line is disconnected due to rust, the utility pole may lose its support and tilt, or the dropped branch line may damage surrounding objects. For this reason, it is necessary to periodically visit and monitor the equipment, check the degree of corrosion, and replace it appropriately. However, this patrol monitoring and replacement work is a heavy burden on the administrator.

  By the way, as described above, the branch line is installed at a position where the bending angle of the electric wire path is 5 ° or more in the angle column, but it is difficult to measure the angle of the electric wire stretched over the sky. For this reason, when the bending angle is around 5 °, it is difficult to clearly determine whether or not the bending angle is exceeded, so when a branch line is installed as a safety measure even when it is actually 5 ° or less There are many.

  By reducing the number of branch lines that are so unnecessary, the number of branch lines to be monitored and replaced can be reduced, so that the labor can be reduced. For this purpose, it is necessary to accurately measure the bending angle of existing and newly installed electric lines.

  As a method for measuring the horizontal angle of the bending angle of the electric wire path, for example, there is a method called transit (theodolite). The transit has a configuration in which the telescope rotates about two axes, a vertical axis and a horizontal axis, and can measure the angle with high accuracy. However, the transit is large and expensive, and it is difficult to arrange the numbers so that all patrolers and designers can use it freely.

  As a method for measuring the bending angle at low cost, there is a “6 m method”. FIG. 12 is a diagram for explaining the 6m method. When there is an electric pole 10 (angle pole) where the electric wire path is bent, a position (ground) where the electric wire 20a before bending is extended by 6 m from the bending position is marked, and the bending position just below the electric wire 20b after bending When the position of 6 m is marked and the distance between these marks is measured, 1 m corresponds to 10 °.

Patent Document 1 describes a configuration in which a bending angle (line angle) is measured using a compass. Specifically, a compass is placed on the surface of a mirror installed horizontally, the electric wire reflected in the mirror is aligned with a reference line passing through the center of the compass, and the angle scale of the compass is rotated to 0 ° and the needle. And the angle of the reference line can be read to obtain the angle of the electric wire with respect to the magnetic north. It is described that this measurement operation is performed between both poles of the utility pole (before and after the electric wire is bent), and the bending angle can be obtained from the difference in angle with respect to magnetic north. According to Patent Document 1, the bending angle can be accurately measured with a simple operation.
JP 2007-278957 A

  However, when the 6m method described above is used, it is necessary to mark the position 6 m from the bending position, so that there is a problem that a wide work area is required and workability is low. For example, the position of 6 m may be on a roadway or in a residential land depending on the location. When it is in a residential land, it is not easy to go in and measure. When it is on the roadway, the work may not proceed depending on the vehicle flow rate. Also, when measuring 6m, two or more workers are necessary because the tip of the measure cannot be fixed on the pavement, but when working on the roadway, a traffic controller is also required, so many personnel are required. Necessary.

  Furthermore, in the 6m method, in order to mark the position where the electric wire is extended or directly below the electric wire, the electric wire is checked by looking up directly above, and the corresponding ground surface position is compared and searched. However, since it is not possible to see the upper electric wire and the ground surface at the same time, the shift is likely to occur and the accuracy is lacking. In addition, the posture of looking up has a problem that the operator is heavily loaded, feels tired, and the feet become unstable.

  According to the technique described in Patent Document 1, a wide work area is not required. However, the measurement must be performed twice between both diameters of the utility pole. And in order to use a compass, you have to be level each time, and a tripod is essential. For this reason, work takes time and there exists a problem in workability | operativity.

  Accordingly, the present invention provides a wire bending angle measuring device and bending angle that are small in work area, can be measured by a single worker, can accurately measure the bending angle with a simple operation, and can be manufactured at low cost. The purpose is to provide a measurement method.

  In order to solve the above problems, a typical configuration of the wire bending angle measuring device according to the present invention includes a mirror, two linear indicators at least one of which can be rotated along the surface of the mirror, and two linear indicators. The angle meter is equipped with an angle meter that can measure the relative angle of the electric pole. The electric wire between the two diameters of the utility pole is reflected in the mirror, and the two linear indicators are matched to each electric wire between the two diameters reflected in the mirror. It shows the bending angle of the electric wire.

  According to the above configuration, the bending angle of the upper electric wire can be measured in a posture that is located almost directly below the angle column and does not impose a downward burden. Therefore, the work area is small, and the worker can measure alone. In addition, since the measurement can be performed by simply matching the two linear indices with the electric wire bent in the mirror, the bending angle can be measured by a simple operation and a single measurement. Moreover, since it has an extremely simple structure, it can be manufactured at low cost and is easy to handle.

  At least one of the two linear indicators is rotatably attached by one rotation axis, and the goniometer is a protractor attached to one of the linear indicators and centered on the rotation axis, and the other of the linear indicators is You may have the angle instruction | indication part which shows the angle on a protractor on the other side of the linear part along a wire with respect to a rotating shaft. Thereby, when making a linear parameter | index along an electric wire, the protractor as an angle meter does not block a visual field. Therefore, the insulator portion where the electric wire bends can be easily matched with the crossing position of the two linear indicators.

  The goniometer is a scale provided on the mirror or its frame, and may have an instruction section for instructing the scale at the tip of the linear index. Thereby, since a protractor is not arrange | positioned in the vicinity of the crossing position of two straight line | wire indices, a protractor does not obstruct | occlude a visual field when reflecting an electric wire. Further, by providing a scale in the vicinity of the outer periphery of the mirror or in the frame portion, the scale can be widened or the scale can be finely divided, so that the angle can be measured more accurately.

  The straight line index may have a slit for seeing through the electric wire. Thereby, the inclination of the linear index with respect to the electric wire can be observed sensitively, and the angle can be measured more accurately. In addition, as a linear parameter | index, it can be made to match | coordinate so that an electric wire may overlap along the one side as a board | plate material similar to a ruler, and an electric wire may overlap as a wire material similar to the hand of a timepiece.

  You may provide the rotation stop part which hold | maintains a linear parameter | index and stops rotation. Thereby, after aligning the straight line index with the electric wire in the mirror, it is possible to read the goniometer at an easy-to-see position by pulling the measuring instrument to the hand with the rotation of the straight line index being suppressed. At this time, since it is possible to prevent the linear index from moving unintentionally, the angle can be measured more easily.

  You may provide the bottom face support part for inclining a mirror with a predetermined angle with respect to an installation surface. Thereby, it is possible to perform measurement at a stable angle. The predetermined angle can be 3 ° to 5 °, for example.

  You may provide the level device which measures level in the state which inclined the mirror by the predetermined angle with respect to the horizontal surface. Although it is necessary to observe the mirror tilted at a predetermined angle, the installation surface (ground) is not always horizontal. In such a case, it is desirable to use the horizontal plane as a reference for accurate measurement. On the other hand, a bubble tube often used as an inexpensive leveler can be recognized as being horizontal, but it cannot be identified even with a slight inclination. Therefore, as described above, the mirror can be easily and reliably tilted at a predetermined angle by attaching a level device so that it is horizontal when the mirror is tilted at a predetermined angle.

  You may provide the utility pole fixing tool for fixing a mirror to a utility pole. The measuring device needs to be installed vertically below the bending position (insulator), but the installation surface (ground) is not always flat, and there may be gravel or weeds. Therefore, by fixing the measuring device to the utility pole as described above, it is possible to always reliably install the measuring device at a desired position.

  You may provide the tripod fixing | fixed part for attaching to a tripod in the back surface of a mirror. Thereby, even if the installation surface is not flat, the measuring instrument can be installed at a desired position. The tripod preferably has a pan head that can be adjusted in angle.

  You may provide the sighting device which consists of the sight gate provided on the rotating shaft of a linear parameter | index, and the sight provided in the front-end | tip vicinity of each two linear parameter | index. It is not a configuration for measuring the angle of the electric wire in the sky, but a configuration for measuring the angle by matching the position in the horizontal direction. When the electric line is newly established, the utility pole has not been constructed yet, and the electric wire is not stretched. In this state, when determining whether the branch line is necessary or not, the bending angle of the stretched electric wire can be known by measuring the angle of two straight lines connecting the target utility pole and the utility poles on both sides. However, it is necessary to perform on-site verification because it is not possible to accurately grasp the construction position of the power pole and the curve of the road by using only the map (design drawing). Therefore, it is necessary to measure the bending angle of the electric wire as a field verification in the state where the pile is struck at the construction site of the utility pole. And by providing a sighting device to the linear index as in the above configuration, the measuring instrument is installed almost horizontally at the construction position of the target utility pole, and the sighting instrument is used to place the linear index on the piles at the utility pole construction positions on both sides. By directing it, the bending angle of the electric wire can be measured easily and reliably when the utility pole is newly installed (before the electric wire is stretched).

  In addition, a typical configuration of the method for measuring the bending angle of the electric wire according to the present invention is such that a mirror with the surface of the mirror facing upward is arranged below the line of sight, and the electric wire bent upward is reflected on the mirror. It is characterized by measuring the bending angle of the electric wire by measuring the relative angle of the two linear indicators along the electric wire bent in the mirror.

  The components corresponding to the technical idea of the bending angle measuring device and the description thereof can be applied to the bending angle measuring method.

  According to the wire bending angle measuring instrument and the bending angle measuring method according to the present invention, the work area is small, the operator can measure alone, and the bending angle of the wire can be accurately measured with a simple operation. The measuring instrument can be manufactured at a low cost.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram illustrating the configuration of a bending angle measuring device, and FIG. 2 is a diagram illustrating the vicinity of an angle meter. The bending angle measuring device (hereinafter simply referred to as “measuring device 100”) includes a mirror 102, two linear indicators 104 and 106, and an angle meter 108.

  As shown in FIG. 1, the two linear indicators 104 and 106 are plate members similar to a ruler, and one linear indicator 104 is fixed with respect to the mirror, and the other linear indicator 106 is approximately the center of the mirror 102. It is pivotally supported so that it can rotate. Although there is no limitation in the length of the linear indicators 104 and 106, when it is 10 cm or more, it is easy to match it along the electric wire.

  As shown in FIG. 2, the angle meter 108 is a protractor (semicircular protractor) in the example of FIG. 1, and the center of the protractor is aligned with the rotation axis 110 of the linear index 106 and is formed integrally with the linear index 104. Has been. The straight line index 106 has a straight line part 106 a that extends along the electric wire on one side of the rotating shaft 110, and an angle instruction part 106 b that indicates the angle on the protractor on the opposite side. With the above configuration, the relative angle formed by the straight line index 104 and the straight line index 106 can be obtained by reading the scale of the goniometer 108.

  The rotating shaft 110 is a knurled screw, and can be loosened or tightened by hand. That is, the rotating shaft 110 functions as a rotation stopping unit that holds the linear index 106 and stops rotation by tightening.

  A frame part 114 is attached around the mirror 102. The front surface of the frame portion 114 is formed higher than the surface of the mirror 102 and is attached to the surface of the mirror 102 and has a function of protecting the linear indicators 104 and 106. The frame portion 114 can be made of an elastic material such as foamed polyurethane or a cushioning material, so that the impact applied to the mirror 102 during use or transportation can be reduced. Further, it is preferable that the frame portion 114 is not limited to the periphery of the mirror 102 but also protects the back surface. Further, on the back surface of the mirror 102, a bottom surface support 116 for tilting the mirror 102 at a predetermined angle with respect to the installation surface is provided as will be described later. Although not shown, a cover for protecting the mirror 102, the linear indicators 104, 106, and the like may be provided on the front surface of the frame so as to protect the waterproof and the damage.

  A bending angle measurement method using the measuring instrument 100 having the above configuration will be described. FIG. 3 is a diagram for explaining the surrounding situation in use, and FIG. 4 is a diagram for explaining how to use the bending angle measuring device.

  In the utility pole 10 shown in FIG. 3, an electric wire 20 is stretched by a lever 14 on a brace 12. The electric wire 20 is bent at the insulator 14. That is, the position of the insulator 14 is the bending position of the electric wire. Since the electric wire 20 is bent, the branch line 18 (the ground branch line in the figure) is attached to the utility pole 10 (angular pole). The measuring instrument 100 measures the bending angle of the electric wire 20.

  First, as shown in FIG. 3, with the surface of the mirror 102 facing upward, the measuring instrument 100 is placed below the line of sight (the ground surface in the figure). At this time, the measuring instrument 100 is arranged so as to be positioned substantially vertically below the insulator 14 which is a bent position as much as possible. Then, when the worker looks into the mirror, the electric wire 20 bent upward is reflected on the mirror 102.

  At this time, by providing the bottom surface support portion 116 on the back surface of the mirror 102, the mirror 102 can be inclined at a predetermined angle with respect to the installation surface. Assuming that a mirror is installed vertically below the bending position (position of the insulator 14) and that the mirror 102 is installed strictly horizontally, the operator's head becomes an obstacle when the operator looks in, and the electric wire 20 becomes a mirror. No longer appears in 102. For this reason, the mirror 102 needs to be tilted so as to connect the optical axis between the electric wire 20 and the eyes of the worker. However, as the tilt increases, the angle error also increases. Therefore, it is desirable to use it with a constant inclination at a stable and shallow angle. As described above, the bottom support 116 is configured to always incline the predetermined angle, whereby measurement can be performed at a stable angle. The predetermined angle can be 3 ° to 5 °, for example.

  FIG. 4A shows a state in which the bent portion of the electric wire 20 is reflected in the mirror 102. Here, the position of the measuring instrument 100 and the position of the line of sight are adjusted so that the insulator 14 which is the bending position coincides with the rotation axis 110. Further, the measuring instrument 100 is rotated so that one of the bent electric wires 20 is along the fixed linear index 104.

  And as shown in FIG.4 (b), the linear parameter | index 106 is rotated so that the other side of the linear part 106a and the bent electric wire 20 may follow. At this time, if the electric wire 20 is placed above the straight line markers 104 and 106, the goniometer 108 is positioned below the straight line indicators 104 and 106. Thereby, when making a linear parameter | index along an electric wire, the protractor as an angle meter does not block a visual field. Therefore, the portion of the insulator where the electric wire bends can be easily matched with the crossing position of the two linear indicators, and the operation can be made simple and reliable.

  When the linear indicators 104 and 106 are along the electric wire 20 between both diameters of the utility pole, the rotary shaft 110 is tightened to fix the linear indicators 106. Thereby, it is possible to prevent the linear index 106 from moving unintentionally after the linear index 106 is aligned with the electric wire 20 in the mirror 102.

  As shown in FIG. 4C, in a state where the rotation of the straight line index 106 is suppressed, the measuring instrument 100 is pulled toward the hand so that it is easy to see, and the scale on the angle meter 108 indicated by the angle indicating unit 106b is displayed at an easy-to-see position. read. Thus, the bending angle of the electric wire 20 can be measured by measuring the relative angle between the two linear indices 104 and 106.

  FIG. 5 is a diagram for explaining the result of verifying the effect of the embodiment. The angle measurement table shown in FIG. 5 measures angles for the case of using transit, the case of using the measuring instrument 100 according to the present embodiment, and the case of using the conventional 6m method. In the table, the parentheses in the case of using the measuring instrument 100 and the case of using the 6m method are errors when the surveying by transit is used as a reference.

  As shown in the figure, the error rate in the case of the 6m method was 4.2%, whereas the error rate in the case of using the measuring device 100 was 3.4%. Thereby, it was confirmed that the measuring device 100 according to the present embodiment can measure with high accuracy even though it is simpler than the conventional method.

  According to the above configuration, the bending angle of the upper electric wire 20 can be measured in a natural body posture that is located almost directly below the utility pole 10 and faces downward. Therefore, since the work area is small and directly below the utility pole, it is possible to always perform measurement while avoiding roadways and residential land. In addition, since the operator can measure alone, the labor cost for the measurement can be kept low. In addition, since the measurement can be performed by simply aligning the two linear indicators 104 and 106 with the electric wire 20 bent in the mirror 102, the bending angle can be quickly measured with a simple operation. Can do. Moreover, since the measuring instrument 100 has a very simple structure, it can be manufactured at low cost, and handling (carefulness in storing, transporting, and handling) is also simple.

[Other configurations of the embodiment]
Below, the other structure of the bending angle measuring device and bending angle measuring method concerning this invention is demonstrated. The same parts as those in the above embodiment are given the same reference numerals, and the description thereof is omitted.

  FIG. 6 is a diagram for explaining another configuration of the linear index, and FIG. 6A is an example of the linear index having a slit. As shown in FIG. 6A, the long plate-like straight line index 122 has a slit 124 for seeing through the electric wire 20. In other words, the straight line index 122 is a long frame having a slit 124 through which the electric wire 20 reflected in the mirror passes. By aligning the angle of the slit 124 so that the electric wire 20 extends along the slit 124, the electric wire 20 becomes invisible at either end of the slit 124 if the inclination is slightly shifted. The inclination of 122 can be observed sensitively, and the angle can be measured more accurately.

  FIG. 6B is an example of a straight line index made of a thin wire. The straight line index 126 is a wire rod similar to a clock hand, and when rotated along the electric wire 20 reflected on the mirror 102, the electric wire 20 and the straight line index 126 can be made to coincide with each other. If the inclination is slightly shifted, the electric wire 20 protrudes from either end of the straight line index 126, so that the inclination of the straight line index 122 with respect to the electric wire 20 can be sensitively observed, and the angle is measured more accurately. be able to.

  FIG. 6C is an example of a straight line index composed of straight lines drawn on a transparent disk. As shown in the figure, the mirror 102 and the frame portion 114 are circular, and a transparent disk 130 is rotatably fitted in the frame portion 114. In the vicinity of the outer periphery of the mirror 102, a scale indicating an angle is drawn in an annular shape, and an angle meter 132 is configured. On the mirror 102, a straight line index 134 passing through the center of the mirror 102 is drawn at the 0 ° position of the goniometer 132. On the other hand, a linear indicator 136 passing through the center of the disc 130 is drawn. The linear index 136 also serves as an index for the angle meter 132. With this configuration, a line of sight other than the thin line markers 134 and 136 is provided near the center of the mirror 102, that is, at the intersection between the straight line markers 134 and 136, that is, around the bent position of the electric wire 20 reflected in the mirror. There is nothing to block. Therefore, it is possible to easily follow the linear index along the electric wire 20 and to accurately measure the angle.

  FIG. 7 is a diagram for explaining another configuration of the angle meter. In FIG. 7, the goniometer 140 is a scale provided on the frame 114. The straight line index 142 is fixed in accordance with a 0 ° position (may be a 180 ° position) on the scale. The straight line index 144 is pivotally supported with the center of the mirror 102 as the rotation axis, and has an instruction unit 144a for instructing the scale of the goniometer 140 at the tip.

  With this configuration, since the protractor is not arranged near the intersection of the two linear indicators 142 and 144, the protractor blocks the field of view regardless of which side of the linear indicator is reflected when the electric wire 20 is reflected. There is no. Further, by providing a scale on the frame portion 114 of the mirror 102, the scale can be widened to the maximum, or the scale can be divided finely, so that the angle can be measured more accurately.

  FIG. 8 is a diagram showing an example provided with a utility pole fixture and a level. The utility pole fixture 152 includes a band 152a for winding around the utility pole 10 and fixing, and an arm 152b for connecting the band 152a and the mirror 102. The band 152a and the arm 152b, and the arm 152b and the mirror 102 are connected by joints 154a and 154b that can be rotated and fixed, respectively.

  The measuring device 100 needs to be installed almost vertically below the bending position (the insulator 14), but the installation surface (ground) is not always flat, and there is gravel or weeds and it cannot be installed. In some cases. Therefore, by fixing the measuring instrument 100 to the utility pole as described above, it is possible to always reliably install the measuring instrument 100 at a desired position.

  By the way, as described above, the mirror 102 needs to be observed in a state where it is tilted by a predetermined angle. However, the installation surface (ground) is not always horizontal, and the angle is further unstable in the case of the utility pole fixture 152. In such a case, it is conceivable to use a level with the horizontal plane as a reference, but the bubble tube often used as an inexpensive level can be recognized to be horizontal, but it can be identified up to a subtle tilt angle. Can not.

  Therefore, a level device 150 is provided on the angle meter 108 side of the mirror 102 (downward, that is, the side where no electric wire is reflected). The level 150 is attached at a predetermined angle such that the mirror 102 is inclined with respect to the horizontal plane by a predetermined angle. As a predetermined angle, it can be 3 degrees-5 degrees, for example. Thereby, the mirror 102 can be tilted by a predetermined angle simply and reliably.

  The level 150 described above does not include the utility pole fixing tool 152 and can be used effectively even when installed on the ground. At this time, the angle of the measuring instrument 100 (the angle of the mirror 102) can be adjusted by putting an object under the measuring instrument 100.

  FIG. 9 is a diagram illustrating an example in which a tripod fixing portion is provided on the back surface of the mirror. As shown in FIG. 9A, a screw hole 160 as an example of a tripod fixing portion is provided on the back surface of the measuring instrument 100 (the back surface of the mirror 102). FIG. 9B shows an example of a state where the camera is fixed to the tripod 162. The tripod 162 can be adjusted in horizontal depending on the length of the foot, but preferably includes a pan head 164 capable of adjusting the angle. At this time, as described above, it is preferable to include the level device 150 that measures the level at a predetermined angle with respect to the mirror surface.

  FIG. 10 is a diagram illustrating an example of a configuration in which the measuring device is placed on the neck. As shown in FIG. 10A, a shoulder belt 170 is attached to the frame portion 114 of the measuring instrument 100. Further, as shown in FIG. 10B, the rotation shaft 172 of the linear index 106 is fixed to the linear index 106, penetrates the mirror 102 rotatably, and has a knob portion 172a on the back side of the mirror 102. . Therefore, by rotating the knob portion 172a on the back side of the mirror 102, the linear index 106 can be rotated. In addition, a spring 174 is provided between the knob portion 172a and the back side of the mirror 102. The rotation is stopped by temporarily applying a sliding resistance to the rotating shaft 172 so that the linear index 106 does not rotate naturally. It functions as a part.

  When the measuring instrument 100 shown in FIG. 10 is used, the belt 170 is hung on the neck, the measuring instrument 100 is applied to the body, and the mirror 102 is held substantially horizontally. Then, in a state where the straight line index 104 is along one of the bent electric wires 20, the knob 172a on the back side of the mirror 102 is rotated so that the straight line index 106 is along the other of the bent electric wires 20 (FIG. 10 (c). )reference). With such a configuration, measurement can be performed as long as the power pole can be approached, and therefore, measurement can be performed in an extremely small work area and at any place.

  FIG. 11 is a diagram illustrating an example in which a sighting device is provided on a straight line index. In FIG. 11A, an sight 180 including a sight 182 provided on the rotation shaft 110 of the linear index 106 and an sight 184 provided near the tip of each of the two linear indices 104 and 106 is provided. Yes. The sight 180 is not a configuration for measuring the angle of the electric wire 20 in the sky, but is a configuration for measuring the bending angle of the electric wire 20 indirectly by aligning the horizontal power pole construction position with the sight 180. .

  When a new electric line is installed, the utility pole 10 has not yet been constructed, and the electric wire 20 has not been stretched. In this state, when determining whether the branch line 18 is necessary or not, the bending angle of the electric wire 20 to be stretched can be known by measuring the angle of two straight lines connecting the target utility pole 10 and the utility poles on both sides. However, it is necessary to perform on-site verification because it is not possible to accurately grasp the construction position of the power pole and the curve of the road by using only the map (design drawing).

  Therefore, as shown in FIG. 11 (b), the bending angle of the electric wire 20 is measured as on-site verification in a state where the pile 22 has been struck at the power pole construction position at the site. Specifically, the measuring instrument 100 is installed substantially horizontally with the tripod 162 standing on the pile 22 struck at the construction position of the target utility pole 10. Then, the angle of the linear index 104 is adjusted so that the sight 182 of the sight 180, the sight 184 of the linear index 104, and the pile 22 indicating the construction position of the utility pole on one side are aligned. Similarly, the angle of the straight line index 106 is adjusted so as to face the other side pile 22. Then, by reading the angle indicated by the goniometer 108, the bending angle of the electric wire to be installed can be known. Thereby, the bending angle of the electric wire can be measured easily and reliably when the utility pole is newly installed (before the electric wire is stretched).

  Even if the sighting device 180 is not provided, if the straight line index is long, the straight line index can be accurately directed to the pile at a distant position. Therefore, as a straight line index 186 shown in FIG. 11C, a telescopic type may be used so that it can be extended for a long time. As a specific example, the length is preferably 1 m or more when stretched.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention can be used as a bending angle measuring device and a bending angle measuring method for measuring a bending angle of an electric wire stretched around a power pole.

It is a figure explaining the structure of a bending angle measuring device. It is a figure explaining the goniometer vicinity. It is a figure explaining the surrounding condition of a use condition. It is a figure explaining the usage of a bending angle measuring device. It is a figure explaining the result of having verified the effect of an embodiment. It is a figure explaining the other structure of a linear parameter | index. It is a figure explaining the other structure of an angle meter. It is a figure which shows the example provided with the utility pole fixing tool and the level device. It is a figure which shows the example which provided the tripod fixing | fixed part in the back surface of the mirror. It is a figure which shows the example of a structure which puts a measuring device on a neck. It is a figure which shows the example provided with the sighting device in the linear parameter | index. It is a figure explaining 6m method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electric pole, 12 ... Arm metal, 14 ... insulator, 18 ... Branch line, 20 ... Electric wire, 20a ... Electric wire before bending, 20b ... Electric wire after bending, 22 ... Pile, 100 ... Measuring instrument, 102 ... Mirror, 104, 106, 122, 126, 134, 136, 142, 144, 186 ... straight line index, 106a ... straight line part, 106b ... angle indicating part, 108 ... angle meter, 110 ... rotating shaft, 114 ... frame part, 116 ... bottom support part , 124 ... slit, 130 ... disc, 132 ... angle meter, 140 ... angle meter, 144a ... indicator, 150 ... level, 152 ... utility pole fixture, 152a ... band, 152b ... arm, 154a, 154b ... joint, 160 ... screw hole, 162 ... tripod, 164 ... pan head, 180 ... sighting device, 182 ... sight gate, 184 ... sight

Claims (11)

With a mirror,
Two linear indicators at least one of which is rotatable along the surface of the mirror;
An angle meter capable of measuring a relative angle between the two linear indicators,
The angle meter shows the bending angle of the electric wire by reflecting the electric wire between the two diameters of the utility pole on the mirror and matching the two linear indicators to the electric wires between the two diameters reflected on the mirror. Electric wire bending angle measuring instrument. The two linear indicators are attached so that at least one of them can be rotated by one rotating shaft,
The angle meter is a protractor attached to one of the linear indicators and centered on the rotation axis,
2. The wire bending according to claim 1, wherein the other of the straight line indicators has an angle indicating portion indicating an angle on the protractor on the opposite side of the straight portion along the wire with respect to the rotation axis. Angle measuring instrument.   The said angle meter is a scale provided in the said mirror or its frame part, Comprising: It has the instruction | indication part which instruct | indicates the said scale at the front-end | tip of the said linear parameter | index, The bending angle measuring device of the electric wire of Claim 1 characterized by the above-mentioned. .   The said linear parameter | index has the slit for seeing through an electric wire, The bending angle measuring device of the electric wire of any one of Claim 1 to 3 characterized by the above-mentioned.   The wire bending angle measuring device according to any one of claims 1 to 4, further comprising a rotation stopping unit that holds the straight line index and stops the rotation.   The electric wire bending angle measuring device according to any one of claims 1 to 5, further comprising a bottom surface support portion for inclining the mirror by a predetermined angle with respect to an installation surface.   The electric wire bending angle measuring device according to any one of claims 1 to 6, further comprising a leveling device that measures the horizontal in a state where the mirror is inclined at a predetermined angle with respect to a horizontal plane.   The electric wire bending angle measuring device according to any one of claims 1 to 5 or 7, further comprising an electric pole fixture for fixing the mirror to the electric pole.   The wire bending angle measuring device according to any one of claims 1 to 5, wherein a tripod fixing portion for attaching to a tripod is provided on a back surface of the mirror.   The bending of the electric wire according to claim 1, further comprising a sighting device comprising a sight gate provided on a rotation axis of the linear index and an sight provided in the vicinity of a tip of each of the two linear indices. Angle measuring instrument. Place the mirror with the mirror surface facing upwards below the line of sight,
Reflect the electric wire bent upward in the mirror,
Align two linear indicators along the wire bent in the mirror,
A method for measuring a bending angle of an electric wire, wherein the bending angle of the electric wire is measured by measuring a relative angle between the two linear indicators.

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