JP3078316U - Measuring device for displacement between straight lines - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The measurement range is wide, so that it can be used in various places, and various kinds of displacement detection sensors can be used. Although the structure is simple, it can be manufactured at low cost and is excellent in handleability, but high measurement accuracy can be obtained. SOLUTION: A cylinder 1 is provided on a base 1 with an X axis and a Y axis.
It is freely supported in two axial directions. A working piston 20 to which a measuring wire A is connected is slidably inserted into the cylinder 10. The cylinder 10 has a tension adjustment conversion mechanism 21
Is provided. The tension adjusting and converting mechanism 21 includes a screw receiving plate 22.
, A tension adjusting screw 23, and a sensor mounting plate 24, and a displacement conversion spring 25 is stretched between the working piston 20 and the tension conversion mechanism 21. An optical fiber sensor 26 is attached to the sensor mounting plate 24.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention can be used to measure and monitor the displacement between straight lines in the civil engineering and construction fields of roads, bridges, tunnels, dams, tunnels, buildings, etc. The present invention relates to an apparatus for measuring displacement between straight lines suitable for use in measurement and monitoring to prevent a disaster caused by deformation.

[0002]

[Prior art]

 Conventionally, for example, when monitoring the displacement of a cut slope, as shown in FIG. 20, a search wire c is stretched between a displacement meter a and a pile b which are installed vertically separated from each other on the slope a. One set is made, and a plurality of sets are arranged at predetermined intervals in the lateral direction of the inclined surface a. In this case, as the displacement meter a, one using a strain gauge or an operation transformer or a mechanical type is used, and a signal cable d and a power cable e are connected to the displacement meter a. There is also a method using an optical fiber sensor and a displacement meter. This uses a fiber Bragg grating (FBG) of an optical fiber as a strain sensor. A strain sensor that periodically forms a high refractive index portion (diffraction grating) in the axial direction of the optical fiber is used as a strain sensor. Things.

[0003]

[Problems to be solved by the invention]

 Among the above-mentioned prior arts, the measurement method using a strain gauge or a working transformer has the following disadvantages. The first is that long-term measurement cannot be performed for 10 to 20 years like an optical fiber, the second is that electrical noise is easily applied to measurement signals, and the third is that a power cable and a signal transfer cable are used for each displacement meter. Fourth, what is necessary is that most of the measuring range is up to about 50 mm and narrow.

In addition, the measurement method using an optical fiber sensor has an advantage that not only point measurement but also surface measurement can be performed with one optical fiber because the optical fiber itself becomes a communication circuit with the sensor. However, there are the following disadvantages. First, it is impossible to measure large displacements because the measurement range is small. Second, it is difficult to install on-site. Third, the price of the displacement gauge is high and the measurement accuracy is low. .

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and can be used in various places because of its wide measurement range. An object of the present invention is to provide an apparatus for measuring displacement between straight lines, which can be manufactured at low cost because of its simplicity, and has excellent handling characteristics and high accuracy.

[0006]

[Means for Solving the Problems]

 Means constituting the invention according to claim 1 configured to solve the above-mentioned problem is that the measuring wire is supported by the support so as to be displaceable in a linear direction, and one end of a measuring wire stretched between the straight lines is connected. A wire connection body, a tension adjustment conversion mechanism provided on the support, a displacement amount conversion body including an elastic member stretched between the tension adjustment conversion mechanism and the wire connection body; And a displacement detection sensor arranged via a sensor attachment member connected between the body and the tension adjustment conversion mechanism.

[0007] The means constituting the invention according to claim 2 is a wire connecting body that is supported by the support so as to be displaceable in a linear direction, and one end of a measuring wire stretched between the straight lines is connected to the wire connecting body. A tension conversion mechanism having a displacement converter formed of an elastic member stretched between the wire connector and the holder, and a sensor tension adjustment mechanism supported by the support; A sensor tension adjusting member which is made of an elastic member having an elastic force weaker than the elastic force of the body and is stretched between the sensor tension adjusting mechanism and the wire coupling member; and a sensor tension adjusting member and a sensor tension adjusting mechanism. And a displacement detection sensor disposed between them via a sensor mounting member.

[0008] The means constituting the invention according to claim 3 is a wire connecting body which is supported by the support so as to be capable of being displaced in a linear direction and to which one end of a measuring wire stretched between the straight lines is connected. A tension receiving member provided on the support, a tension adjusting conversion mechanism provided on an elastic operating piece of the tension receiving member, and It comprises a displacement converter formed of a stretched elastic member, and a displacement detection sensor attached to the elastic receiving portion that receives the tension of the displacement converter.

[0009] The means constituting the invention according to claim 4 is a wire connecting body that is supported by the support so as to be displaceable in a linear direction and that is connected to one end of a measurement wire stretched between the straight lines, A wire tension conversion mechanism provided on the holding body and having a displacement amount conversion body made of an elastic member stretched between the wire coupling body, and a tension provided on the support body having an elastic operation piece. A receiving member, a sensor tension adjusting mechanism provided on an elastic operating piece of the tension receiving member, and an elastic member having an elastic force weaker than the elastic force of the displacement amount converting member, and a wire connection with the sensor tension adjusting mechanism. It comprises a sensor tension adjuster stretched between the body and the body, and a displacement detection sensor provided on the elastic operation piece of the tension receiver.

[0010] The support according to each of the above claims may be mounted on a base that is supported so as to be displaceable in two X-axis and Y-axis directions.

[0011]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 6 show a first embodiment of the present invention. In the drawing, reference numeral 1 denotes a stainless steel base for installation at a measurement place, and the base 1 includes a flat base 2 having a plurality of screw insertion holes 2A, 2A, and a base. And a vertical support 6 rotatably connected to the horizontal support 4 via a connecting pin 5 so as to be rotatable in a horizontal direction via a connecting pin 3. And a cylindrical holder 7 fixed to the upper end of the vertical support 6, and a fastening screw 8 screwed to the cylindrical holder 7, and the cylindrical holder 7 is arranged in the horizontal direction of the X axis. , And can be displaced in two directions perpendicular to the Y axis.

Reference numeral 10 denotes a cylinder as a support which is included in the cylindrical holder 7 of the base 1 and constitutes the apparatus for measuring displacement between straight lines according to the present embodiment. The cylinder 10 has a cylinder body 11 made of stainless steel, which is a cylinder open at both ends in the axial direction, and a rod insertion hole 12A formed at the center, and is fitted to the tip end side of the cylinder body 11 via a seal material. A front end cap 12, a rear end cap 13 fitted to the rear end of the cylinder body 11 via a sealant, and an inner surface of the cylinder main body 11 which is located between the front end cap 12 and a front frame 16 to be described later. A guide key 14 is provided in the axial direction, and the inside of the cylinder 10 is liquid-tight.

A frame 15 is provided in the cylinder 10 so as to be able to be inserted and removed. The frame 15 is fitted substantially in the middle of the cylinder body 11, and a piston chamber 11 A is formed between the frame 15 and the tip cap 12. An annular front frame 16 that defines an annular rear frame 17 that is positioned near the rear end of the cylinder body 11 and that is fitted to define an operating chamber 11B; It is composed of a pair of connecting members 18, 18 made of a metal bar connecting the side frame 17 and the front frame 16 at a predetermined interval, and includes a tip cap 12, a front frame 16, and a rear frame 17. Are fastened to the cylinder body 11 by fixing screws 19, 19,....

Reference numeral 20 denotes an operation piston as a wire connection member slidably provided on the cylinder 10. The operation piston 20 is inserted into the piston chamber 11 A, and is slidably mounted on the outer periphery of the guide key 14. A piston main body 20A having a key groove for rotation prevention formed therein, and a piston rod 20B having a base end fixed to the piston main body 20A, slidably inserted into the rod insertion hole 12A, and protruding outward. And an eyebolt 20C fixed to the distal end of the piston rod 20B. The base end of the measuring wire A to be stretched is engaged with the eyebolt 20C.

Reference numeral 21 denotes a tension adjustment / conversion mechanism for converting the displacement of the measurement wire A. The tension adjustment / conversion mechanism 21 includes a screw receiving plate 22 screwed to the rear frame 17 and the screw receiving plate 22. The screw shaft 23A is inserted into the plate 22 so as to be able to advance and retreat and cannot rotate. The nut 23B is screwed to the screw shaft 23A. The screw 23A is advanced by screwing the nut 23B. And a sensor mounting plate 24 made of a high-strength steel plate connected to the distal end of the screw shaft 23A. Reference numeral 25 denotes a displacement conversion spring composed of a tension spring connected to the distal end side of the sensor mounting plate 24 and the piston body 20A. The displacement conversion spring 25 is proportional to the amount of displacement of the measuring wire A due to an external force by the elastic modulus. It is a thing to be converted.

Further, reference numeral 26 denotes an optical fiber sensor as a displacement detection sensor attached to one surface of the sensor mounting plate 24, and optical fibers connected to both ends of the optical fiber sensor 26 are connected to a cable connector provided on the rear end cap 13. 27, 27 are connected.

The measuring apparatus of the straight line between the displacement according to the present embodiment consists of the above-described configuration, in the for example Cut inclined surface b as shown in FIG. 6, fixed above b ₁ of the inclined surface b Kuiro , b, a, ... a plurality erected laterally at desired intervals, a plurality placed below Lee _second measuring device Ha, Ha, the ... at predetermined intervals. A measuring wire A is stretched in a meandering manner between each measuring device C and the pile B, and each measuring device C is connected in series by an optical fiber B. A light source (not shown) and a measuring device are connected to one end of the optical fiber B.

When a landslide occurs on a part of the cut slope a in the above-described installation state, the measuring device c located at the landslide portion a ′ is also displaced and the straight line between the pile b and the measuring device c is displaced. The distance is displaced, and excessive tension is applied to the measurement wire A. The displacement conversion spring 25 is proportionally extended by the elasticity of the measurement wire A due to the tension applied to the measurement wire A, and the optical fiber sensor 26 is distorted by the stress deformation of the tension sensor mounting plate 24. It is possible to accurately measure the value obtained by converting a large displacement between straight lines with the measuring device c into a minute displacement.

Further, as the pile B moves in a different direction due to a landslide, the direction of tension of the measurement wire A linearly stretched between the pile B and the measuring device C also changes. Since the cylinder 10 is supported by the base 1 so as to be able to follow the two axes of the X-axis direction and the T-axis direction, the working piston 20 can always follow the pulling direction of the measurement wire A. Can be transmitted to the working piston 20 accurately.

FIG. 7 to FIG. 9 show a second embodiment. Note that, in this embodiment and other embodiments described later, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the figure, reference numeral 31 denotes a wire tension conversion mechanism for converting the tension of the measurement wire A. The wire tension conversion mechanism 31 includes a screw receiving plate 32 screwed to the rear frame 17 and a screw receiving plate 32. A tension adjusting screw comprising a screw shaft 33A which is inserted so as to be able to advance and retreat and cannot rotate, and a nut 33B which is screwed to the screw shaft 33A. 33 and a displacement conversion spring 34 for proportionally converting the displacement of the measurement wire A. The displacement conversion spring 34 is provided between the distal end side of the screw shaft 33A and the piston body 20A. It consists of a tension spring that is stretched in the area.

Reference numeral 35 denotes a sensor tension adjusting mechanism. The sensor tension adjusting mechanism 35 includes a screw shaft 36A and a nut 36B, and the screw shaft 36A is slidably and non-rotatably inserted through the screw receiving plate 32. An adjusting screw 36 composed of a screw; a strip-shaped sensor mounting plate 37 connected to the distal end of a screw shaft 36A of the adjusting screw 36; a distal end of the sensor mounting plate 37 and the piston body 20A; And a sensor tension adjusting spring 38 comprising a tension spring having a spring force weaker than the amount conversion spring 34. An optical fiber sensor 39 is attached to the sensor mounting plate 37.

According to the present embodiment having the above-described configuration, the principle of measuring the displacement of the measurement wire A is substantially the same as that of the first embodiment, but the displacement of the measurement wire A is The tension conversion mechanism 31 converts the displacement proportionally, and the converted displacement is measured by the optical fiber sensor 39 provided on the sensor tension adjuster 35. Therefore, the sliding resistance between the cylinder 10 and the working piston 20 is reduced. Accurate measurement can be performed without acting on the sensor tension adjusting body 35, and the optical fiber sensor 39 can be prevented from being damaged because an impact does not directly act on the optical fiber sensor 39.

Next, FIGS. 10 and 11 show a third embodiment. In the figure, reference numeral 41 denotes a cylinder, and the cylinder 41 is composed of a hollow cylindrical cylinder body 42 and a front end cap 12 and a rear end cap 13 for closing the openings at both ends in the axial direction. Although there is no difference from the cylinder 10 in this embodiment, the axial length of the cylinder body 42 is set to be shorter by about 20%.

Reference numeral 43 denotes a frame which is inserted into the cylinder 41. The frame 43 includes a front frame 16 and a rear frame 17, and a pair of connecting members 44, 44 connecting the frames 16, 17. The configuration is the same as that of the first embodiment, but the connecting member 44 is set to be short like the cylinder body 42.

Next, reference numeral 45 denotes a tension adjustment conversion mechanism. Reference numeral 46 denotes a tension receiver which constitutes the tension adjustment / conversion mechanism 45. The tension receiver 46 is formed by integrally forming a mounting piece 46A and an operating piece 46B in a substantially L-shape with a high-strength steel plate. The mounting piece 46A is fixed to the inner peripheral surface of the cylinder body 11 at the position 11B. Reference numeral 47 denotes a tension adjusting screw. The tension adjusting screw 47 includes a screw shaft 47A that is inserted into the operating piece 46B so as to be able to advance and retreat and cannot rotate, and a nut 47B screwed to the screw shaft 47A. The screw shaft 47A is formed of a feed screw that advances and retreats by being screwed.

Reference numeral 48 denotes a displacement conversion spring 48 formed by a tension spring extending between the distal end of the screw shaft 47A of the tension adjusting screw 47 and the piston body 20A. Reference numeral 49 denotes an optical fiber sensor attached to an operation piece 46B of the tension receiver 46.

According to the present embodiment, the operation piece 46B of the tension receiver 46 that receives the displacement amount of the measurement wire A is a cantilever and has a large amount of bending, so that the mechanism is simple. However, a large output can be obtained.

Next, FIGS. 12 and 13 show a modification of the third embodiment. In the figure, reference numeral 51 denotes a cylinder, 52 denotes a cylinder main body constituting the cylinder 51, and the cylinder main body 52 has an axial length shorter than that of the cylinder main body 42 in the third embodiment. An annular reinforcement 53 is fitted in the middle of the direction. Reference numeral 54 denotes a box-shaped casing fixed to the rear end side of the cylinder main body 52. The casing 54 includes a casing 54A main body 54A and a lid 54B. It is dense.

Reference numeral 56 denotes a tension adjustment conversion mechanism. Reference numeral 57 denotes a tension adjusting / conversion mechanism 56, which is a tension receiver provided in the displacement detection chamber 55. The tension receiver 57 integrally includes a mounting piece 57A and an operating piece 57B in a substantially L-shape. The operating piece 57B is formed to be approximately two or two times as long as the operating piece 46B described above. Numeral 58 denotes a tension adjusting screw, which comprises a screw shaft 58A and a nut 58B, like the above-mentioned tension adjusting screw 47, and the screw shaft 58A is capable of moving forward and backward to the operating piece 57B. It is inserted so as not to rotate and protrudes into the cylinder body 52. Reference numeral 59 denotes a displacement conversion spring formed by a tension spring stretched between the distal end side of the screw shaft 58A and the piston body 20A. Reference numeral 60 denotes an optical fiber sensor attached to the operation piece 57B.

According to the present embodiment, the cylinder 51 is composed of the cylinder main body 52 and the box-shaped casing 54, and in the casing 54, the operation piece 57 B is provided with the tension receiving body 57 having a long and large deflection amount. Therefore, the mechanism is simple and a larger output can be obtained, so that high measurement accuracy can be obtained.

FIG. 14 to FIG. 16 show a fourth embodiment. The same components as those of the third embodiment described above are denoted by the same reference numerals, and the description thereof is omitted. In the figure, reference numeral 61 denotes a wire tension conversion mechanism for converting the displacement amount of the measurement wire A. The wire tension conversion mechanism 61 includes a screw receiving plate 62 screwed to the rear frame 17 and a screw receiving plate 62. The screw shaft 63A is inserted into the screw shaft 63A so as to be able to advance and retreat and cannot rotate. The nut 63B is screwed to the screw shaft 63A. An adjusting screw 63 is provided. Reference numeral 64 denotes a displacement amount conversion spring for proportionally converting the displacement amount of the measurement wire A. The displacement amount conversion spring 64 is a tension spring provided between the distal end of the screw shaft 63A and the piston body 20A. Consists of

Reference numeral 65 denotes a sensor tension adjusting mechanism. Reference numeral 66 denotes a tension receiver constituting the sensor tension adjusting mechanism 65. The tension receiver 66 is formed by integrally forming a mounting piece 66A and an operating piece 66B in a substantially L-shape with a high-strength steel plate. The mounting piece 66A is fixed to the inner peripheral surface of the cylinder body 42 in the chamber 11B. Reference numeral 67 denotes a tension adjusting screw. The tension adjusting screw 67 includes a screw shaft 67A that is inserted into the operating piece 66B so as to be able to advance and retreat and cannot rotate, and a nut 67B screwed to the screw shaft 67A. The screw shaft 67A is formed of a feed screw which is advanced by turning. Reference numeral 68 denotes a sensor tension adjusting spring formed of a tension spring. The sensor tension adjusting spring 68 is connected between the operating piece 66B and the piston body 20A.

According to the present embodiment, the displacement of the measuring wire A is converted by the wire tension converting mechanism 61 in a specific manner, and the converted displacement is measured by the optical fiber sensor 49 provided in the sensor tension adjusting mechanism 65. Since the sliding resistance between the cylinder 10 and the working piston 20 does not act on the sensor tension adjusting body 65, accurate measurement can be performed, and no impact directly acts on the optical fiber sensor 49. Damage to the optical fiber sensor 49 can be prevented.

Further, since the operating piece 66B of the tension receiving body 66 for receiving the displacement amount of the measuring wire A becomes a cantilever and has a large bending amount, the mechanism is simple but a large output can be obtained. it can.

Next, FIGS. 17 to 19 show modified examples of the fourth embodiment. In the figure, 71 is a cylinder, 72 is a cylinder main body constituting the cylinder 71, and the cylinder main body 72 has an axial length shorter than that of the cylinder main body 42 in the fourth embodiment. An intermediate reinforcing member 73 and a rear end reinforcing member 74 each formed of a ring are fitted to the middle and rear ends in the direction, respectively.

Reference numeral 75 denotes a wire tension conversion mechanism for converting the amount of displacement of the measurement wire A. The wire tension conversion mechanism 75 includes a screw receiving plate 76 screwed to the rear end reinforcing member 74 and the screw receiving plate. The screw shaft 77A is inserted into the plate 76 so as to be able to advance and retreat and cannot rotate. The nut 77B is screwed to the screw shaft 77A. The screw shaft 77A is advanced by screwing the nut 77B. And a tension adjusting screw 77. Reference numeral 78 denotes a displacement conversion spring for proportionally converting the displacement of the measurement wire A. The displacement conversion spring 78 is a tension member provided between the distal end of the screw shaft 77A and the piston body 20A. Consists of a spring.

Further, reference numeral 79 denotes a box-shaped casing fixed to the rear end of the cylinder main body 72. The casing 79 comprises a casing main body 79A and a lid 79B. 80 is liquid-tight.

Reference numeral 81 denotes a sensor tension adjusting mechanism provided in the displacement detection chamber 80, and reference numeral 82 denotes a tension receiving body constituting the sensor tension adjusting mechanism 81. The tension receiving body 82 includes a mounting piece 82A and an operating piece. The operating piece 82B is formed to be substantially L-shaped integrally, but the operating piece 82B is set to be about two or two times as long as the operating piece 66B described above. Reference numeral 83 denotes a sensor tension adjusting screw. The sensor tension adjusting screw 83 comprises a screw shaft 83A and a nut 83B, similarly to the tension adjusting screw 67 described above, and the screw shaft 83A can advance and retreat to the operating piece 82B. Further, it is inserted so as not to rotate and protrudes into the cylinder body 72. Reference numeral 84 denotes a tension adjusting spring formed by a tension spring stretched between the distal end side of the screw shaft 83A and the piston body 20A. The optical fiber sensor 60 is attached to one side surface of the operation piece 82B.

According to the present embodiment, the amount of displacement of the measurement wire A is converted by the wire tension conversion mechanism 75, and the converted amount of displacement is measured by the optical fiber sensor 49 provided in the sensor tension adjustment mechanism 81. Since the configuration is such that the sliding resistance between the cylinder 10 and the working piston 20 does not act on the sensor tension adjusting body 65, accurate measurement can be performed, and no impact directly acts on the optical fiber sensor 60. Damage to the optical fiber sensor 60 can be prevented.

In addition, since the operation piece 82 B is provided with the tension receiving member 82 having a long bending amount in the casing 79, the mechanism is simple and a larger output can be obtained, so that a high measurement can be obtained. Accuracy can be obtained.

In each of the embodiments, the displacement amount conversion bodies use the displacement amount conversion springs 25, 34, 48, 59, 64, and 78, and the sensor tension adjustment bodies include the sensor tension adjustment springs 38, 68, and 84. Although used, another elastic member such as rubber may be used instead of the spring.

In each embodiment, an optical fiber sensor is used as the displacement detection sensor. However, another sensor such as a strain sensor may be used.

[0043]

[Effect of the invention]

 The present invention has the following advantages because it is configured as described above. (1) Since the displacement converter made of an elastic member reduces and converts the displacement of the measuring wire proportionally and detects this displacement, a large displacement can be measured. (2) The measurement range can be made arbitrarily large by appropriately selecting the displacement converters having different elastic moduli, so that it can be used in various places. (3) A variety of displacement detection sensors can be used, and the structure is simple, so that the sensor can be manufactured at low cost. (4) By using an optical fiber sensor as the displacement detection sensor, it is possible to obtain excellent accuracy in handling and high accuracy. (5) Because the displacement of the measurement wire is converted by the wire tension conversion mechanism and the converted displacement is detected by the sensor tension adjustment mechanism, the impact from the measurement wire is not directly transmitted to the displacement detection sensor. In addition, more accurate measurement can be performed, and the displacement detection sensor is not damaged. (6) Using a tension receiver having an elastic operating piece and converting the amount of displacement by the deflection of the elastic operating piece that receives the tension of the measuring wire to measure the displacement using a displacement detection sensor, a large measurement output is obtained. Obtainable. (7) Since the support is mounted on a base that supports the X and Y axes so that it can be displaced in two directions, high measurement accuracy can be obtained by instantaneously following the direction in which the measurement wire is pulled. Can be.

[Brief description of the drawings]

FIG. 1 to FIG. 6 relate to a first embodiment of the present invention, and FIG. 1 is a cross-sectional view of an apparatus for measuring displacement between straight lines.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken in the direction of arrows III-III in FIG.

FIG. 4 is a side view of the base.

FIG. 5 is a sectional view of a base.

FIG. 6 is an explanatory diagram showing a state of use of a measuring device for displacement between straight lines.

FIGS. 7 to 9 relate to the second embodiment, and FIGS.
FIG. 3 is a cross-sectional view of a measuring device for displacement between straight lines.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7;

FIG. 9 is a cross-sectional view in the direction of arrows IX-IX in FIG. 7;

FIGS. 10 and 11 relate to a third embodiment, and FIG. 10 is a cross-sectional view of an apparatus for measuring displacement between straight lines.

FIG. 11 is a sectional view taken along the line XI-XI in FIG. 10;

FIGS. 12 and 13 relate to a modification of the third embodiment, and FIG. 12 is a cross-sectional view of an apparatus for measuring displacement between straight lines.

FIG. 13 is a sectional view taken in the direction of arrows XIII-XIII in FIG.

FIG. 14 to FIG. 16 relate to a fourth embodiment, and FIG. 14 is a cross-sectional view of an apparatus for measuring displacement between straight lines.

FIG. 15 is a sectional view taken in the direction of arrows XV-XV in FIG. 14;

FIG. 16 is a sectional view taken in the direction of the arrow XVI-XVI in FIG. 14;

17 to 19 relate to a modification of the fourth embodiment, and FIG. 17 is a cross-sectional view of an apparatus for measuring displacement between straight lines.

18 is a cross-sectional view taken along the arrow XVIII-XVIII in FIG.

FIG. 19 is a sectional view taken in the direction of the arrow XIX-XIX in FIG. 17;

FIG. 20 is an explanatory diagram of a method for measuring displacement between straight lines according to a conventional technique.

[Explanation of symbols]

Reference Signs List 1 base 10, 41, 51, 71 cylinder (support) 20 working piston (wire connection) 21, 45, 56 tension adjustment conversion mechanism 24, 37 sensor mounting plate 25, 34, 48, 59, 64, 78 displacement Amount conversion springs (displacement amount conversion bodies) 26, 39, 49, 60 Optical fiber sensors 31, 61, 75 Wire tension conversion mechanisms 35, 65, 81 Sensor tension adjustment mechanisms 38, 68, 84 Sensor tension adjustment springs 46, 57, 66, 82 Tension receiver 46B, 57B, 66B, 82B Working piece A Measurement wire

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuichi Ohara 24-4, Nishi-ku, Sapporo-shi, Hokkaido 1-6-5-1, Aichi Co., Ltd. 1-5-6-1, Aichi Co., Ltd. (72) The inventor Takahiro Wada 24-5, Nishi-ku, Sapporo, Hokkaido 1-5-6-1, Aichi Co., Ltd.

Claims (5)

[Utility model registration claims] 1. A wire connector, which is supported on a support so as to be displaceable in a linear direction and to which one end of a measurement wire stretched between the straight lines is connected, a tension adjustment conversion mechanism provided on the support, A displacement amount conversion body made of an elastic member stretched between the tension adjustment conversion mechanism and the wire connection body; and a sensor mounting member connected between the displacement amount conversion body and the tension adjustment conversion mechanism. And a displacement detecting sensor disposed between the two. 2. A wire connector, which is supported on a support so as to be displaceable in a linear direction and to which one end of a measurement wire stretched between straight lines is connected, and a wire connector provided on the support, and A wire tension conversion mechanism having a displacement converter formed of an elastic member stretched therebetween, a sensor tension adjustment mechanism supported by the support, and an elasticity having an elastic force weaker than the elastic force of the displacement converter. A sensor tension adjuster that is formed between the sensor tension adjuster and the wire connector, and is disposed between the sensor tension adjuster and the sensor tension adjuster via a sensor mounting member. An apparatus for measuring displacement between straight lines, comprising a displacement detection sensor. 3. A wire connector, which is supported by the support so as to be displaceable in a linear direction and is connected to one end of a measurement wire stretched between the straight lines, and an elastic operating piece, and is provided on the support. A tension receiving body, a tension adjustment conversion mechanism provided on an elastic operating piece of the tension reception body, and a displacement amount conversion body comprising an elastic member stretched between the tension adjustment conversion mechanism and the wire connector. And a displacement detection sensor attached to the elastic operating piece receiving the tension of the displacement converter. 4. A wire connector, which is supported on a support so as to be displaceable in a linear direction and to which one end of a measurement wire stretched between the straight lines is connected, and a wire connector provided on the support, and A wire tension conversion mechanism having a displacement amount conversion member formed of an elastic member stretched between the tension receiving members, an elastic operation piece, a tension receiving member provided on the support, and an elastic operation of the tension receiving member. A sensor tension adjusting mechanism provided on one of the pieces, and an elastic member having an elastic force weaker than the elastic force of the displacement converter, and a sensor tension adjusting body stretched between the sensor tension adjusting mechanism and the wire coupling body. And a displacement detection sensor provided on an elastic operation piece of the tension receiving body. 5. The straight line according to claim 1, wherein the support is mounted on a base that is supported so as to be displaceable in two X-axis and Y-axis directions. Displacement measuring device.