JP7243296B2 - measuring device - Google Patents

Description

The present invention relates to a measuring device that measures the distance from a reference position to a measurement position.

BACKGROUND ART The undergrounding of electric wires, which are laid by pulling cables such as power lines into pipelines buried in the ground, is progressing. Such undergrounding of electric wires is carried out mainly for power lines that supply electric power in urban areas. Power lines that constitute underground power lines are usually buried under roads.

If the ground in which the pipelines that make up the underground power lines are drawn is soft and the traffic on the roads on the pipelines is heavy, the power lines in the pipelines will move in the direction of travel of the vehicle (wave riding phenomenon). may occur. Due to this wave-riding phenomenon, if the power line is subjected to excessive tension or is excessively bent, power transmission will not be carried out well, and various power equipment that receives power supply from the power line will have problems. Sometimes. For this reason, the status of movement of the power line is checked as appropriate to prevent troubles in the power equipment.

The status of the movement of the power line can be checked, for example, by placing a mark on the power line installed inside the manhole and measuring the amount of movement of the mark and the amount of movement of the mark inside the manhole. Specifically, conventionally, for example, a measuring instrument for measuring the length of the power line, such as a convex, is applied to the power line, and the length from the position where the power line is drawn out in the manhole to the mark made on the power line is measured. I was checking the situation related to the movement of

As a related technology, specifically, conventionally, for example, the lower side of a slider configured by a rectangular plate with a pair of through holes is provided with a scale at a position where it contacts the upper surface of the object to be measured. There is a technology related to a measuring tool that slides a slider relative to a straight body and measures the height of a part by a scale of the straight body indicated by the lower side (for example, see Patent Document 1 below).

In addition, as a related technology, specifically, conventionally, for example, a displacement sensor installed near a long measurement object and a displacement sensor pulled out from the displacement sensor and arranged in parallel along the measurement object There are technologies related to a movement amount measuring device for measuring the amount of movement of an object to be measured and a movement amount measuring method to measure the amount of movement of the object to be measured, which includes wire fixing means for fixing the end of a sensor wire to the object to be measured. (see, for example, Patent Document 2 below).

In addition, as a related technology, specifically, conventionally, for example, an anchoring body attached to the cable in a flange shape by clamping the cable, and both ends of the anchoring body and the duct outlet wall surface in the manhole are fixed. There is a technology related to a device for checking and suppressing a surfing phenomenon that includes an elastic body and a measure that is bridged between the outlet wall surface of the pipeline and the anchor body to measure the amount of movement of the anchor body (for example, See Patent Document 3 below.).

In addition, as a related technology, specifically, conventionally, for example, a support part that has a protruding piece that protrudes from the outer surface and supports a long shaft body (cable), and a support part that is installed and fixed on an immovable surface to restrict the movement of the support part a movement amount indicating portion including a rod parallel to the movement direction of the long shaft and two movable members movably mounted on the rod and propelled only in directions away from each other by the protruding pieces; (see, for example, Patent Document 4 below).

JP 2018-017660 A JP 2018-112497 A JP 2010-206995 A JP 2007-151282 A

However, the conventional technology of measuring the amount of movement of a power line by applying a measuring instrument such as a convex to the power line is ancillary equipment such as a restraint device that is provided to suppress further movement of the power line where the wave riding phenomenon occurs. There is a problem that it is difficult to accurately measure the amount of movement of the power line due to the interference of the measuring instrument with the mark and the distance between the mark and the measuring instrument.

In addition, the conventional technique of measuring the amount of movement of the power line by applying a measuring instrument such as a convex to the power line cannot accurately read the measured value when the space inside the manhole where the amount of movement of the power line is measured is narrow. However, there is a problem that it is difficult to accurately measure the amount of movement of the power line.

In addition, the conventional techniques described in Patent Documents 1 to 4 also have the problem that it is difficult to accurately measure the amount of movement of the cable restrained by the existing restraining device. . Specifically, for example, in the conventional technique described in the above-mentioned Patent Document 1, it is necessary to position the measuring tool near the object to be measured when measuring, and if a restraint device is installed, the power line to be measured Since the measuring tool cannot be positioned in the vicinity of the power line, there is a problem that it is difficult to accurately measure the amount of movement of the power line.

Also, when measuring a power line with ancillary equipment such as a restraint device by placing a tool on top of the ancillary equipment, interference between the tool and the ancillary equipment and distance between the mark and the measuring instrument may cause In addition, there is a problem that it is difficult to accurately grasp the transition of the amount of movement of the power line because the position where the tool is applied and the reading position vary depending on the operator who performs the measurement.

In addition, the conventional technology described in the above-mentioned Patent Document 2 has a complicated structure, is assumed to require periodic maintenance, and is complicated to manage. There was a problem that it was not practical because it was indispensable and the installation work was complicated and it was not realistic to attach it to all the cables to be measured.

In addition, the conventional technology described in the above-mentioned Patent Document 3 is configured to be used by being attached to an immovable body such as the wall surface of a manhole, and is not applicable to a site where a restraining device for restricting the movement of cables is already installed. It is difficult, and in order to apply the conventional technology, a large-scale replacement work is required from the existing restraint device, which is complicated.

In addition, the conventional technology described in the above-mentioned Patent Document 4 uses two movable members that are propelled only in directions away from each other. It is possible to prevent the reciprocating motion of the cable and monitor the maximum amount of movement of the power cable. In order to apply the technology of the prior application, a large-scale replacement work for the existing restraining device is required, which is complicated, and there is a problem of poor practicality.

SUMMARY OF THE INVENTION An object of the present invention is to provide a measuring apparatus capable of accurately specifying the length of a power line from a reference position such as a manhole wall to a measuring position, in order to solve the above-described problems of the prior art. .

In order to solve the above-described problems and achieve the object, the measuring device according to the present invention has an abutting portion having a single plane and an elongated shape, and one end in the length direction is opposite to the plane. a scale portion connected to the abutting portion at one side thereof, the other end in the length direction extending along a direction perpendicular to a plane formed by the planes; and a slider movable along the length direction of the scale portion. a light source unit mounted on the slider unit to emit light having directivity in a direction perpendicular to the length direction of the scale unit; and light emitting positions of the light source unit in the length direction of the scale unit. and an indicator.

In addition, the measuring device according to the present invention has an abutting portion having three or more support legs whose tips are arranged on a single plane; a scale portion connected to the abutting portion on the opposite side and having the other end in the length direction extending along a direction perpendicular to the plane formed by the plane; and a scale portion movable along the length direction of the scale portion. a slider portion, a light source portion mounted on the slider portion and emitting light exhibiting directivity in a direction perpendicular to the length direction of the scale portion, and a light emitting position of the light source portion in the length direction of the scale portion. and an indicating portion for indicating.

Further, in the measuring device according to the present invention, in the above invention, the scale section includes an index indicating a distance from the plane in the length direction, and the indicating section includes a position of light emitted by the light source section relative to the index. A position is indicated.

In the measuring device according to the present invention, in the above invention, the indicators include a plurality of scales provided at predetermined intervals along the length direction of the scale portion, and the vicinity of the predetermined scales among the scales. and a numeral attached to guide the distance from the plane.

Moreover, the measuring apparatus according to the present invention is characterized in that, in the above invention, the symbol represents at least one of characters, symbols, and marks.

Further, in the measuring device according to the present invention, in the above invention, when the slider portion is applied with an external force, the slider portion moves along the length direction of the scale portion in response to the external force, and is released from the external force. and a regulating member that stops at a position where the external force is released when the external force is applied.

Further, in the measuring device according to the present invention, in the above invention, the slider portion includes a regulating member, the regulating member abuts against the scale portion, and when an external force is applied, allows the slider portion to move along the length direction of the scale portion, and when the slider portion is released from the external force, the slider portion is at the position released from the external force due to the frictional force acting between the slider portion and the scale portion. It is characterized by comprising a regulating member that stops the slider portion.

Moreover, the measuring apparatus according to the present invention is characterized in that, in the above invention, the restricting member stops at a position released from the external force due to friction with the scale portion.

According to the measuring apparatus of the present invention, it is possible to accurately specify the length of the power line from the reference position such as the wall surface of the manhole to the measuring position.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram (Part 1) showing the configuration of a measuring device according to Embodiment 1 of the present invention; FIG. 2 is an explanatory diagram (part 2) showing the configuration of the measuring device of the first embodiment according to the present invention; It is an explanatory view showing a slider part in a measuring device concerning this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram (part 1) showing a usage example of the measuring device according to Embodiment 1 of the present invention; FIG. 2 is an explanatory diagram (part 1) showing the configuration of a measuring device according to Embodiment 2 of the present invention; FIG. 2 is an explanatory diagram (part 2) showing the configuration of a measuring device according to Embodiment 2 of the present invention; FIG. 3 is an explanatory diagram (part 3) showing the configuration of a measuring device according to Embodiment 2 of the present invention; FIG. 10 is an explanatory diagram (part 1) showing a usage example of the measuring device according to Embodiment 2 of the present invention; It is explanatory drawing (part 2) which shows the usage example of the measuring device of Embodiment 2 concerning this invention.

Preferred embodiments of the measuring apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

<Embodiment 1>
(Configuration of measuring device)
First, the configuration of the measuring apparatus according to Embodiment 1 of the present invention will be described. 1 and 2 are explanatory diagrams showing the configuration of a measuring device according to Embodiment 1 of the present invention. FIG. 1 shows an overall perspective view of a measuring device according to Embodiment 1 of the present invention. FIG. 2 shows a partially exploded perspective view of the measuring device according to Embodiment 1 of the present invention.

1 and 2, the measuring apparatus 100 of the first embodiment according to the present invention includes an abutting section 110, a scale section 120, a slider section 130, a light source section 140, and an indicating section 150. there is The abutting portion 110 has a flat plate shape. The abutting portion 110 may have a rectangular flat plate shape, or may have a polygonal, circular, or elliptical flat plate shape.

The abutting portion 110 has a flat surface 111 on at least one side. Plane 111 is realized by a single plane passing through three non-collinear points. The plane 111 has no projections protruding from the plane 111 and has a flat shape. The abutting portion 110 is formed using a material exhibiting a degree of hardness that does not easily deform when pressed. Specifically, the abutting portion 110 can be formed using, for example, synthetic polymers such as polycarbonate, polyacetal, nylon, and acrylic, as well as metal materials such as steel.

The scale portion 120 includes a base 121 having an elongated shape such as a straight bar shape or a straight cylinder shape. Specifically, the base 121 can be realized by, for example, a rectangular material such as a prism or a rectangular tube (square pipe). Alternatively, the base 121 may be specifically implemented by, for example, a round bar, cylinder (circular pipe, elliptical pipe), or the like.

Substrate 121 can be formed using, for example, a synthetic polymer called plastic, metal, wood, or the like. By realizing the base body 121 using a hollow member such as a square pipe, a circular pipe, or an elliptical pipe, the weight of the measuring device 100 can be reduced and the handling of the measuring device 100 can be facilitated.

The base 121 has a linear shape, and one end in the length direction is connected to the abutting portion 110 . The base 121 is connected to the abutting portion 110 on the opposite side of the abutting portion 110 from the flat surface 111 . The base 121 is connected to the abutting portion 110 at a substantially central position of the flat surface 111 of the abutting portion 110 . As a result, the measurement device 100 can be stably brought into contact with a reference position such as the inner wall surface of a manhole in the operation of measuring the amount of movement of the power line, which will be described later.

The base 121 may be connected to the abutting portion 110 at the end (periphery) of the flat surface 111 of the abutting portion 110 . In this case, the abutting portion 110 and the scale portion 120 form a substantially “L” shape when viewed from a direction perpendicular to the length direction of the base 121 . The abutting portion 110 and the base 121, which are substantially L-shaped, can be integrally formed, for example, by bending a sheet metal member.

The other end of the base 121 in the length direction, that is, the end opposite to the one end connected to the abutting portion 110 extends along the direction perpendicular to the plane formed by the plane 111 of the abutting portion 110 . ing. The extending direction of the base 121 (the lengthwise direction of the scale portion 120) and the plane 111 of the abutting portion 110 are orthogonal to each other.

The scale portion 120 has an index 122 that indicates the distance from the plane 111 in the length direction. The index 122 is attached to at least one surface of the base 121 realized by square bars. The index 122 can be realized, for example, by a plurality of scales provided at predetermined intervals along the length direction of the scale section 120 . Specifically, the scale can be provided in units of 1 mm, for example. The scale is not limited to be provided in units of 1 mm, and may be provided in units of 1 cm or 5 cm.

Indices 122 may also include, for example, symbols attached near or around the scale. The symbols guide the distance of the corresponding scale from the plane 111 at the abutment 110 . A symbol represents at least one of a letter, a sign and a mark. Specifically, the symbols are characters (numbers) that directly indicate the distance from the plane 111 in the abutting portion 110 to the corresponding scale, such as "1", "2", "3", . . . ).

Characters that realize symbols include units such as "1 mm", "2 mm", "3 mm", ... or "1 cm", "2 cm", "3 cm", ... and so on. You can stay. Also, the characters that realize the symbols may be contents that guide the significance of the index 122, such as "initial position of installation", "previous measurement position", and "2019 ○ month x day measurement". .

The symbols may be assigned the same number as the scale corresponding to all scales, for example, "5" and "10", or "5 mm" and "10 mm", or "5 cm" and "10 cm". , may be attached only near or around a predetermined scale corresponding to a specific position. In this way, by attaching symbols only near or around predetermined scales corresponding to specific positions, compared to the case where the same number of symbols are attached to all scales, the indicator 122 can be easily understood. can guide you.

Further, concretely, the symbol may be implemented by a code (graphic) that makes a specific scale stand out, such as "·" or "*". Further, specifically, the symbol may be, for example, a mode that distinguishes a predetermined scale corresponding to a specific position from other scales. More specifically, for example, predetermined scales corresponding to specific positions can be indicated in red, and other scales can be indicated in black. Alternatively, a predetermined scale corresponding to a specific position may be indicated by a thicker line than other scales.

The slider portion 130 is provided movably along the length direction of the scale portion 120 . The slider section 130 has a rectangular parallelepiped slider main body 131, for example, a hexahedron in which all surfaces are formed of rectangles. The slider body 131 may have a shape in which at least one set of two opposing faces of the faces forming the hexahedron forms a square. Further, the slider body 131 may have a shape in which all the faces forming a hexahedron are squares.

The slider body 131 has a first through-hole 132 penetrating through the slider body 131 along the opposing direction of the two opposing surfaces. Further, the slider body 131 has a second through hole 133 penetrating the first through hole 132 from one plane different from the two planes through which the first through hole 132 penetrates.

The slider main body 131 is attached to the scale portion 120 through the second through hole 133 so that the index 122 on the scale portion 120 can be seen. Specifically, by aligning the direction of the second through hole 133 in the slider body 131 and the position of the index 122 in the scale portion 120 upward, The indicator 122 can be visually observed.

The slider portion 130 has a restricting member 201 . Regulating member 201 can be implemented, for example, by a rubber block fixed to slider main body 131 with a portion thereof in contact with base 121 of scale portion 120 .

The regulating member 201 is not limited to a rubber block, and may be realized by a rubber sheet. A rubber sheet can be provided on the inner wall surface of the first through-hole 132, for example. As a result, the restricting member 201 can be made difficult to be visually recognized from the outside, and the aesthetic appearance of the measuring apparatus 100 can be ensured.

The regulating member 201 is not limited to a block or sheet made of rubber, and may be a block or sheet made of silicon or urethane, for example. Also, the restricting member 201 may be implemented by a block or sheet made of artificial leather or natural leather, for example.

The regulating member 201 fixes the position of the slider body 131 with respect to the scale portion 120 by its own frictional force when no external force is applied. The regulating member 201 behaves according to the same principle as the movement of rubber molecules and fillers that form a tire of an automobile.

As a result, when an external force is applied to the slider portion 130, the slider portion 130 is allowed to move along the length direction of the scale portion 120 according to the external force, and when the slider portion 130 is released from the external force. Furthermore, the frictional force between the regulating member 201 and the base 121 allows the slider portion 130 to stop at the position released from the external force.

It is preferable that the regulating member 201 is provided so as to come into contact with the surface on which the index 122 is not attached on the base 121 that is realized by the rectangular material. As a result, the index 122 is rubbed by the regulating member 201 when the slider portion 130 is moved with respect to the scale portion 120, which may cause the index 122 to peel off or the index 122 to become thin and reduce visibility. can be prevented.

The light source section 140 is mounted on the slider section 130 and moves along the length direction of the scale section 120 as the slider section 130 moves along the length direction of the scale section 120 . The light source section 140 includes a light emitter 141 that emits light having directivity in a direction perpendicular to the length direction of the scale section 120 .

Light emitter 141 can be realized by, for example, an LED (Light Emitting Diode). An LED is constructed by stacking a light-emitting member (anode) on a silicon substrate (cathode). Since the silicon substrate does not transmit light, light emitted from the LED is emitted only from the light-emitting member side.

The light source unit 140 further includes a power supply circuit including a lens that converges the light emitted by the light emitter 141 into parallel light, a battery that supplies power to the light emitter 141, and a switch that switches light emission/extinction of the light emitter 141 (not shown). ), etc. Thereby, the light emitted by the light emitter 141 exhibits directivity.

Light emitter 141 may be implemented by, for example, a laser oscillator. A laser oscillator is composed of a resonator, a laser medium, an excitation light source, and the like, and generates coherent light. A laser oscillator may be realized by an LD (LASER Diode). The laser oscillator may be a red laser that emits red light, a blue laser that emits blue light, or a green laser that emits green light.

The indicating portion 150 indicates the position of light emitted by the light source portion 140 in the length direction of the scale. The indicating portion 150 is realized by a pointer whose one end is fixed to the periphery of the second through hole 133 in the slider body 131 and whose other end extends inside the second through hole 133 along the surface of the base 121 . can be done.

One end of the pointer is fixed on the peripheral edge of the second through hole 133 in the slider body 131 and on the extension line of the optical path of the light emitted from the light source section 140 . In the first embodiment, the other end of the pointer extends from one end of the pointer along the extension line of the optical path of the light emitted from the light source unit 140 to the vicinity of the peripheral edge opposite to the peripheral edge to which the one end is fixed. ing.

FIG. 3 is an explanatory diagram showing the slider section 130 in the measuring device 100 according to the present invention. FIG. 3 shows the slider portion 130 of the measuring device 100 according to the present invention as seen from the direction of arrow A in FIG.

As shown in FIG. 3 , the pointer (hereinafter referred to as “pointer 150 ” as appropriate) that realizes the indicating section 150 has a scale provided on the base 121 at least part of the movement locus accompanying the movement of the slider section 130 . are provided so as to overlap with The movement locus of pointer 150 has a width dimension indicated by arrow 300 in FIG. By providing the pointer 150 in this way, the positional relationship between the pointer 150 and the scale becomes easy to understand, and the position indicated by the pointer 150 can be easily guided.

(Usage example of measuring device 100)
Next, a usage example of the measuring device 100 of Embodiment 1 according to the present invention will be described. FIG. 4 is an explanatory diagram showing a usage example of the measuring device 100 according to Embodiment 1 of the present invention.

The power line 401 is realized by, for example, a transmission line buried in the ground by undergrounding electric wires. Power lines 401 buried underground are accommodated in narrow spaces such as underground tunnels and manholes, unlike overhead power transmission. For this reason, a safe insulation process is performed so that even if the power lines 401 come into contact with each other, they do not interfere with the power transmission system.

Specifically, the power line 401 is insulated, for example, by providing a thick coating made of an insulating material around the conductor that transmits electricity. For this reason, the power line 401 buried in the ground is heavy, and it is not easy to return it to the original position before the movement when it is moved due to the wave-riding phenomenon.

The operation of measuring the amount of movement of the power line 401 is appropriately performed according to the movement state of the power line 401, etc., for the purpose of preventing the occurrence of problems such as poor power transmission caused by the wave riding phenomenon. When it is determined that the wave riding phenomenon is occurring on the power line 401 based on the amount of movement of the power line 401, ancillary equipment such as a restraint device 402 is attached to the power line 401 in order to suppress further movement of the power line 401. .

When measuring the amount of movement of the power line 401, as shown in FIG. 4, the amount of movement of the power line 401 drawn into the manhole from the wall surface 403 of the manhole is measured. Specifically, the amount of movement of the power line 401 is determined by measuring the distance from the wall surface 403 of the manhole to the mark 404 provided on the power line 401 drawn into the manhole from the wall surface 403 of the manhole.

A mark 404 indicates a reference measurement position for measuring the amount of movement of the power line 401 . The mark 404 can be provided at any position on the power line 401 . Specifically, the mark 404 can be realized by, for example, a tape or coating provided so as to make one round of the outer circumference at the arbitrary position.

When the width of the mark 404 (the dimension of the mark 404 in the length direction of the power line 401) is large, for example, by providing an indication symbol 405 such as an arrow pointing to the end of the mark 404, the operator who performs the measurement can determine the measurement result. It is possible to prevent the occurrence of variations in

When measuring the amount of movement of the power line 401, first, the flat surface 111 of the abutting portion 110 of the measuring device 100 is brought into contact with the wall surface 403 from which the power line 401 whose amount of movement is to be measured is led out. At this time, the worker P supports the measuring device 100 so that the entire flat surface 111 of the abutting portion 110 contacts the wall surface 403 of the manhole.

Next, the switch of the light source unit 140 is operated to cause the light emitter 141 to emit light, the slider unit 130 is gripped, and the slider unit 130 is moved along the length direction of the scale unit 120 . The switch of the light source section 140 may be operated at the time when the flat surface 111 of the abutting section 110 is brought into contact with the wall surface 403 of the manhole. The slider section 130 is moved along the length direction of the scale section 120 to a position where the light emitted by the light source section 140 irradiates the measurement position.

Then, the value indicated by the instruction section 150 is read when the slider section 130 is positioned at the position where the light emitted by the light source section 140 irradiates the measurement position. Specifically, among the scales (indicators 122) that can be read through the second through hole 133, the value of the scale indicated by the pointer 150 is read. Thereby, the amount of movement of the power line 401 can be measured.

Since the slider portion 130 includes the regulating member 201, the operator P releases the slider portion 130 when the slider portion 130 is positioned at the position where the measurement position is irradiated with the light emitted by the light source portion 140. Accordingly, the position of the slider portion 130 can be fixed while the slider portion 130 is positioned at a desired position. As a result, the worker P can concentrate on reading the scale after positioning the slider 130 at a desired position without holding down the slider portion 130 until reading of the scale indicated by the pointer 150 is completed. can.

As described above, the measuring device 100 according to the first embodiment of the present invention has an abutting portion 110 having a flat surface 111 and an elongated shape, and one end in the length direction is opposite to the flat surface 111 . a scale portion 120 connected to the abutting portion 110 at one end thereof and extending along the direction orthogonal to the plane formed by the plane 111 at the other end in the length direction; A slider portion 130, a light source portion 140 mounted on the slider portion 130 and emitting light exhibiting directivity in a direction perpendicular to the length direction of the scale portion 120, and a light emission position of the light source portion 140 in the length direction of the scale are determined. and an instruction unit 150 that indicates the

According to the measuring apparatus 100 of Embodiment 1 according to the present invention, the light source unit 140 emits light having directivity in the direction orthogonal to the length direction of the scale unit 120. Therefore, the light emitted by the light source unit 140 is measured. By moving the slider part 130 along the length direction of the scale part 120 to the position where the position is irradiated, the light source part 140 indicated by the plane 111 in the abutment part 110 and the indicator part 150 in the length direction of the scale is illuminated. The distance between the reference position such as the wall surface 403 against which the plane 111 abuts and the measurement position irradiated with the light emitted by the light source unit 140 can be reflected in the measuring device 100 by the distance from the light emitting position. . Since the abutment portion 110 and the scale portion 120 are united, the operator P can measure the distance between the reference position and the measurement position reflected in the measuring device 100, thereby determining the distance between the reference position and the measurement position. can accurately determine the distance between

Since auxiliary equipment such as the restraint device 402 is provided around the power line 401 drawn into the manhole from the wall surface 403 of the manhole, a measuring instrument such as a scale cannot be applied along the power line 401. Even if it is not possible to do so, the worker P must keep the flat surface 111 of the abutting part 110 abutting against the wall surface 403 of the manhole and the light emitting position indicated by the indicator 150 when the measurement index 122 provided on the power line 401 is irradiated. , the length of the power line 401 from a reference position such as a manhole wall 403 to the measurement position can be accurately specified.

Further, in measuring apparatus 100 according to Embodiment 1 of the present invention, scale portion 120 includes index 122 indicating the distance from plane 111 in the length direction, and indicator portion 150 indicates the position of light emitted by light source portion 140. position relative to the indicator 122.

According to the measuring apparatus 100 of Embodiment 1 according to the present invention, the operator P moves the slider section 130 along the length direction of the scale section 120, and the light emitted from the light source section 140 irradiates the measurement position. By confirming the position of the pointer 150 with respect to the index 122 in the state where the can easily identify the distance between Thereby, the worker P can easily specify the length of the power line 401 from the wall surface 403 of the manhole to the measurement position.

Further, in the measuring apparatus 100 according to the first embodiment of the present invention, the indicators 122 are composed of a plurality of scales provided at predetermined intervals along the length direction of the scale portion 120, and predetermined scales of the scales. and a symbol attached near the scale to guide the distance from the plane 111 .

According to the measuring device 100 of Embodiment 1 according to the present invention, among the multiple scales provided at predetermined intervals, based on the scale at the position indicated by the indicator 150 and the symbol attached near the scale, The distance between the reference position and the measurement position can be easily and accurately determined. Thereby, the worker P can easily and accurately specify the length of the power line 401 from the wall surface 403 of the manhole to the measurement position.

Moreover, the measuring device 100 of Embodiment 1 according to the present invention is characterized in that the symbol represents at least one of characters, symbols, and marks.

According to the measuring device 100 of Embodiment 1 according to the present invention, the operator P can more easily and accurately determine the distance between the reference position and the measured position.

Further, in the measurement apparatus 100 according to the first embodiment of the present invention, when an external force is applied, the slider portion 130 moves along the length direction of the scale portion 120 in response to the external force. It is characterized in that when the external force is released, it stops at the position where the external force is released.

Specifically, when the slider portion 130 includes a regulating member 201, and the regulating member 201 abuts on the scale portion 120 and an external force is applied, the slider portion 130 moves in the length direction of the scale portion 120 according to the external force. and, when released from the external force, the slider portion 130 is stopped at a position released from the external force by the frictional force acting between the scale portion 120 and the scale portion 120. It is characterized by having a member 201 .

According to the measuring apparatus 100 of Embodiment 1 according to the present invention, it is only necessary to move the slider along the length direction of the scale section 120 to the position where the light emitted by the light source section 140 irradiates the measurement position. , the distance between the reference position and the measurement position can be reflected in the measurement device 100 . As a result, the length of the power line 401 from the wall surface 403 of the manhole to the measurement position can be specified easily and accurately.

Moreover, the measuring device 100 of Embodiment 1 according to the present invention is characterized in that the regulating member 201 stops at a position released from external force due to friction with the scale portion 120 .

According to the measuring device 100 of Embodiment 1 according to the present invention, the slider section 130 can be fixed at a desired position with a simple configuration without increasing the size and weight. As a result, the measuring device 100 can be easily handled, and the burden on the worker P involved in the work of measuring the amount of movement of the power line 401 can be reduced.

<Embodiment 2>
(Configuration of measuring device 100)
Next, the configuration of the measuring device according to Embodiment 2 of the present invention will be described. In Embodiment 2, the same parts as those in Embodiment 1 described above are denoted by the same reference numerals, and descriptions thereof are omitted.

5 to 7 are explanatory diagrams showing the configuration of a measuring device according to Embodiment 2 of the present invention. 5 to 7, a measuring device 500 according to Embodiment 2 of the present invention includes an abutting section 110, a scale section 120, a slider section 530, a light source section 140, and an indicating section 150. there is

The slider portion 530 includes a slider body 531 having a top surface 531 a that is inclined in a direction away from the base 121 toward the other end (front end) of the scale portion 120 in the length direction. A mirror 532 is provided inside the slider body 531 on the top surface 531 a of the slider body 531 . The mirror 532 faces the indicator 122 attached to the base 121 while being inclined along the inclination direction of the top surface 531a.

In the slider body 531 , a wall surface 403 on the other end side (front end side) in the length direction of the scale portion 120 is provided with a second through hole 533 penetrating through the wall surface 403 . The second through hole 533 penetrates the first through hole 132 . As a result, the index 122 and pointer 150 attached to the base 121 transferred to the mirror 532 can be visually recognized through the second through hole 533 .

(Usage example of measuring device 500)
Next, a usage example of the measuring device 500 of Embodiment 2 according to the present invention will be described. 8 and 9 are explanatory diagrams showing a usage example of the measuring device 500 of the second embodiment according to the present invention. Note that FIG. 9 shows a state in which the orientation (angle) of the measuring device 500 with respect to the power line 401 is rotated by 90 degrees for explanation.

As shown in FIGS. 8 and 9, when measuring the amount of movement of the power line 401, the flat surface 111 of the abutting portion 110 of the measuring device 500 is the wall surface from which the power line 401, whose movement amount is to be measured, is drawn out. Hit 403. Then, with the light emitter 141 emitting light, the slider portion 530 is gripped and moved along the length direction of the scale portion 120 to a position where the light emitted by the light source portion 140 irradiates the measurement position. move.

After that, the value indicated by the indicator 150 is read when the slider 530 is positioned at the position where the light emitted by the light source 140 irradiates the measurement position. In measuring device 500 of Embodiment 2, mirror 532 is provided on inclined top surface 531a, and second through-hole 533 extends from wall surface 403 of scale portion 120 on the other end side (tip side) in the length direction. , the operator P can point the pointer 150 out of the scale reflected on the mirror 532 from the other end side (front end side) of the scale portion 120 in the length direction through the second through hole 533. Read tick values. Thereby, the amount of movement of the power line 401 can be measured.

As described above, in the measuring device 500 according to the second embodiment of the present invention, the slider portion 530 has a top surface 531a that faces the indicator 122 and the pointer 150 of the indicating portion 150, and the top surface 531a that faces the indicator 122 and and a mirror 532 arranged to face the pointer 150 .

According to the measuring device 500 of the second embodiment according to the present invention, the wall surface 403 of the manhole is provided with the restraint device 402 that restrains the power line 401 drawn out from the wall surface 403, and the restraint device 402 and the Even if there is not enough space around the power line 401 for the worker P to put his face in, the distance between the reference position and the measurement position can be specified accurately.

Since auxiliary equipment such as the restraint device 402 is provided around the power line 401 drawn into the manhole from the wall surface 403 of the manhole, a measuring instrument such as a scale cannot be applied along the power line 401. Even if it is not possible to do so, the worker P must keep the flat surface 111 of the abutting part 110 abutting against the wall surface 403 of the manhole and the light emitting position indicated by the indicator 150 when the measurement index 122 provided on the power line 401 is irradiated. , the length of the power line 401 from a reference position such as a manhole wall 403 to the measurement position can be accurately specified.

In addition, the measuring apparatus according to the present invention has a protruding portion having three or more supporting legs arranged so that the tips thereof are positioned on a single plane, instead of the abutting portion 110 having the flat surface 111 described above. A contact portion 110 may be provided.

According to such a measuring apparatus, similarly to the measuring apparatuses 100 and 500 described above, the light source unit 140 emits light having directivity in the direction orthogonal to the length direction of the scale unit 120. Therefore, the light source unit 140 emits light. By moving the slider along the length direction of the scale section 120 to a position where the measured position is irradiated with the light emitted from the beam, the light source section indicated by the flat surface 111 in the abutting section 110 and the indicator section 150 in the length direction of the scale. The distance between the reference position such as the wall surface 403 against which the flat surface 111 abuts and the measurement position irradiated with the light emitted by the light source unit 140 can be reflected in the measuring device by the distance between the light emitting position by 140. can. Since the abutment portion 110 and the scale portion 120 are united, the distance between the reference position and the measurement position reflected in the measuring device is measured to obtain the distance between the reference position and the measurement position. can be precisely identified.

Since auxiliary equipment such as the restraint device 402 is provided around the power line 401 drawn into the manhole from the wall surface 403 of the manhole, a measuring instrument such as a scale cannot be applied along the power line 401. Even if it is not possible, the distance between the flat surface 111 of the abutting part 110 that abuts against the wall surface 403 of the manhole and the light emitting position indicated by the indicator 150 in the state of illuminating the measurement index 122 provided on the power line 401 By measuring , the length of the power line 401 from the reference position such as the wall surface 403 of the manhole to the measurement position can be specified accurately.

In addition, according to such a measuring device, for example, when measuring the length of a cable such as a power line 401 pulled out from a wall surface 403 having unevenness such as mortar spray painting, for the wall surface 403, It is possible to stably abut the measuring device and prevent the scale portion 120 from tilting in the longitudinal direction with respect to the wall surface 403 due to the convex portion on the wall surface 403 .

Specifically, on the wall surface 403 serving as the reference position, the measuring device can be brought into contact with the wall surface 403 while avoiding a convex portion that protrudes more than the surroundings. As a result, the measuring device can be abutted so that the length direction of the scale part 120 is orthogonal to the wall surface 403 without being influenced by the state of the wall surface 403, and the distance between the reference position and the measurement position can be accurately determined. can be specified.

INDUSTRIAL APPLICABILITY As described above, the measuring device according to the present invention is useful as a measuring device for measuring the distance from a reference position to a measuring position. suitable for the device.

REFERENCE SIGNS LIST 100 measuring device 110 abutting portion 111 plane 120 scale portion 121 base 122 index 130 slider portion 131 slider main body 132 first through hole 133 second through hole 140 light source portion 150 indicating portion 201 regulating member 401 power line 402 restraint device 403 manhole wall of 404 mark

Claims (8)

A measuring device for measuring the movement of a power line installed in a manhole,
an abutting portion having a flat surface abutting against the wall surface of the manhole ;
A scale having an elongated shape, one end in the length direction being connected to the abutting portion on the side opposite to the plane, and the other end in the length direction extending along a direction orthogonal to the plane formed by the plane. Department and
a slider portion movable along the length direction of the scale portion;
a light source unit that is mounted on the slider unit and emits light having directivity to the power line that is present in a direction perpendicular to the length direction of the scale unit;
an indicator that indicates a light emitting position of the light source in the length direction of the scale;
with
The abutting portion is abutted against the wall surface of the manhole so that the length direction of the scale portion is parallel to the laying direction of the power line, and the light emitted from the light source portion is directed to a predetermined mark provided on the power line. By moving the slider part so as to hit the part and visualizing the distance from the wall surface of the manhole to the mark part of the power line by the light emitting position in the length direction of the scale part indicated by the indicator part, A measuring device for measuring a moving state of the power line . 2. The measuring apparatus according to claim 1, further comprising a mirror member provided on the slider section for changing a viewing direction of the light emission position in the length direction of the scale section indicated by the indicator section to a different direction. . The scale portion has an index indicating a distance from the plane in the length direction,
The indicator indicates the position of the light emitting position of the light source unit with respect to the indicator,
3. The measuring device according to claim 1 or 2, characterized in that: The indicator includes a plurality of scales provided at predetermined intervals along the length direction of the scale portion, a symbol attached near a predetermined scale among the scales to guide the distance from the plane, 4. The measuring device according to claim 3, characterized in that it is constructed by: 5. The measuring device according to claim 4, wherein the symbol represents at least one of letters, symbols, and marks. When an external force is applied to the slider portion, the slider portion moves along the length direction of the scale portion in accordance with the external force, and when the external force is released, the slider portion stops at a position released from the external force. The measuring device according to any one of claims 1 to 5, characterized by: The slider section includes a regulating member,
The regulation member is
contacting the scale portion,
allowing the slider portion to move along the length direction of the scale portion according to the external force when an external force is applied;
Claims 1 to 6, further comprising: a regulating member that, when released from the external force, stops the slider portion at a position released from the external force by a frictional force acting between the slider portion and the scale portion. The measuring device according to any one of. 8. The measuring device according to claim 7, wherein the regulating member stops at a position released from the external force due to friction with the scale portion.

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