JP2004101399A - Method and instrument for measuring diameter of linear member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and accurately measure the diameter of a wire rope, etc. <P>SOLUTION: A diameter measuring instrument has a body 10 through which a rope 5 (wire-shaped member) is passed. In the body 10, a pair of leaf springs 34 (measurement-assisting members) which elastically come into contact with the rope 5 from the outside in the radial direction and a pair of laser displacement gauges 38 positioned on the outsides of the springs 34 are incorporated. The displacement gauges 38, respectively detect the distances to the leaf springs 34 and output the detected distance values to a controller, provided separately from the main body 10. The controller is provided with a calculating means, which calculates the diameter of the rope 5 and a storing means, which stores the thicknesses of the leaf springs 34 and the arranging interval of the displacement gauges 38 as known information. The calculating means calculates the diameter of the rope 5, based on the detected distance values obtained by means of the displacement gauges 38 and the known information. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and apparatus for measuring the diameter of a linear member, and more particularly to a method and apparatus for measuring the diameter of a linear member having irregularities on its surface such as a wire rope or a deformed steel rod. It is about.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a driving mechanism using a wire rope, an opening and closing mechanism such as a dam or a river gate that opens and closes a gate as the wire rope is wound up and down has been generally known. In addition, transport mechanisms such as ropeways and cable cars, and transport mechanisms such as cranes are also well known.
[0003]
[Problems to be solved by the invention]
Each of the above mechanisms using a wire rope uses a wire rope under severe conditions where an excessive tensile load is applied, and early detection of strength deterioration or damage due to the life and deterioration of the wire rope is performed. It is indispensable to replace and repair as necessary in order to ensure functionality and safety. Therefore, it is common practice to periodically measure the diameter of the wire rope and detect deterioration or damage from the result.
[0004]
However, the diameter measurement of the wire rope as described above still depends on a primitive method in which an operator performs the measurement using a caliper, and the workability is extremely poor. In addition, measurement of the entire wire rope has not been actually performed due to the restriction of work time, and there is room for improvement in reliability.
[0005]
Therefore, it is desired that such a measuring operation can be performed more efficiently, more preferably, it can be automated. The wire rope is formed by twisting a plurality of strands and has irregularities on the surface, and the diameter is generally measured on the basis of the convex portion. Therefore, even when the measurement is automated, it is necessary to accurately measure the diameter based on the convex portion of the wire rope.
[0006]
The present invention has been made in view of the above problems, and has as its object to provide a diameter measuring method and a device for a linear member capable of efficiently and accurately measuring the diameter of a wire rope or the like. I have.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a diameter measuring method of the present invention is a method in which a pair of measurement auxiliary members are elastically contacted with respect to a linear member from the radial outside thereof, and a wire is sandwiched between the measurement auxiliary members. A distance from the sensor to a predetermined detection position of the measurement auxiliary member is detected by a pair of non-contact type distance sensors respectively disposed on opposite sides of the linear member, and a contact position of the measurement auxiliary member with respect to the linear member. From the known information including the distance from the distance sensor to the detection position of the measurement auxiliary member and the distance between the two distance sensors, and the diameter of the linear member based on the detection value by each of the distance sensors. (Claim 1).
[0008]
According to this measuring method, the diameter of the linear member can be easily and efficiently obtained without using calipers. In addition, in this method, the diameter of the linear member is determined by detecting the distance to the auxiliary member in a state where the auxiliary member is elastically contacted with the surface of the linear member. Also, it is possible to perform an accurate diameter measurement based on the convex part among the irregularities of the strand formed on the rope surface.
[0009]
In this method, for example, a plate-shaped measurement auxiliary member is brought into contact with a linear member, and a distance to a surface opposite to the contact surface is detected by the distance sensor. It is preferable to determine the diameter of the linear member by subtracting the detection value of each distance sensor and the thickness of each measurement auxiliary member from the arrangement interval of both distance sensors as the arrangement interval of the distance sensors as known information (claim 2). .
[0010]
According to this method, the "distance from the contact position of the measurement auxiliary member to the linear member to the detection position of the measurement auxiliary member by the distance sensor" is the thickness of the measurement auxiliary member, and an error occurs in the known information. There is less room and consequently the required diameter reliability is improved.
[0011]
On the other hand, the diameter measuring device of the present invention includes a pair of measurement auxiliary members elastically in contact with the linear member from the outside in the radial direction, and the linear member sandwiching the measurement auxiliary member in the radial direction. A pair of non-contact type distance sensors that are respectively disposed on opposite sides and detect a distance to a predetermined detection position of the measurement auxiliary member, and a distance sensor based on a contact position of the measurement auxiliary member with respect to the linear member. Storage means for storing known information including a distance of the measurement auxiliary member to the detection position and an arrangement interval of the distance sensors; and a diameter of the linear member based on the known information and a value detected by each of the distance sensors. And a calculating means for calculating (3).
[0012]
According to this device, the distance from the sensor to the measurement auxiliary member is detected by the distance sensors arranged on both sides in the radial direction of the linear member, and the detected value and the arrangement interval of each distance sensor stored in the storage unit are detected. The diameter of the linear member is automatically obtained by the calculating means based on known information such as the above. Therefore, by moving the linear member relatively in the axial direction, the diameter of the linear member can be continuously measured in the longitudinal direction. Since the distance to the measurement auxiliary member is measured by a non-contact distance sensor, the influence of the vibration on the measured value is small, and the durability is good.
[0013]
In this device, the measurement auxiliary member extends in the axial direction along the linear member, and is supported in a state where the measurement auxiliary member is bent in an arc shape from the radial outside to the inside of the linear member. A spring, the arc-shaped bent portion of which is provided so as to be pressed against the linear member, and the distance sensor is provided as the detection position on a side opposite to a contact surface of the leaf spring with respect to the linear member. The calculating means is provided to detect the distance to the surface of the plate, and the calculation value of the thickness of the leaf spring and the distance between the two distance sensors as known information, the detection value of each distance sensor from the distance between the two distance sensors and It is preferable that the diameter of the linear member is obtained by subtracting the plate thickness of each leaf spring.
[0014]
According to this configuration, since the measurement auxiliary member has a very simple configuration including a leaf spring, it is advantageous in simplifying the configuration of the apparatus and reducing the cost. Further, since “the distance from the contact position of the measurement auxiliary member to the linear member to the detection position of the measurement auxiliary member by the distance sensor” is the plate thickness of the leaf spring, there is less room for an error in the known information. Therefore, the reliability of the measurement result can be improved.
[0015]
When the diameter of the wire rope is measured as the linear member, the measurement auxiliary member has a contact surface with the wire rope straddling two strands adjacent to the longitudinal direction among the strands constituting the wire rope. Preferably, it is provided as follows.
[0016]
Of course, a configuration in which the measurement auxiliary member contacts one strand of the wire rope, or a configuration in which the contact surface of the measurement auxiliary member straddles three or more adjacent strands may be used. If the contact surface straddles the two strands as described above, as will be described in detail in the embodiment, the contact area with the wire rope is appropriate, and it is possible to secure the detection unit of the distance sensor to some extent. In addition to this, there is an advantage that a reasonable configuration is achieved because wear can be suppressed.
[0017]
Further, in the configuration according to claim 3, the measurement auxiliary member is supported so as to be displaceable in a radial direction of the linear member, and a detection unit of the distance sensor is provided in the same direction and on a side opposite to the linear member. And a guide roller member that comes into contact with the linear member so that the roller member can be brought into contact with the linear member by being urged by an urging means that applies an urging force to the linear member side. (Claim 6).
[0018]
According to this configuration, since the measurement auxiliary member comes into contact with the linear member via the roller member, it is possible to perform measurement while moving the linear member relatively smoothly in the axial direction.
[0019]
In the apparatus according to claims 3 to 6, a plurality of pairs of the above-described pair of measurement auxiliary members and the pair of distance sensors are provided, and each pair has a different angle around the linear member. It is preferable that the linear members are arranged at intervals so that the diameters of the linear members in different directions can be measured (claim 7).
[0020]
According to this configuration, by moving the linear member relatively in the axial direction, it is possible to obtain measured values (diameters) in a plurality of directions at arbitrary positions in the longitudinal direction. High measurement results can be obtained.
[0021]
In the diameter measuring device according to claims 3 to 7, a housing for inserting the linear member is provided, and the pair of measurement auxiliary members and the pair of distance sensors are incorporated inside the housing. The housing is composed of a pair of unit bodies connected to be openable and closable along the axial line of the linear member, and the linear member can be inserted into the housing through the open portion in an open state. And by closing the housing in a state where the linear member is inserted, the pair of measurement auxiliary members each elastically contact the linear member from the radial outside thereof. It is preferable that a measurement auxiliary member and a distance sensor are incorporated (claim 8).
[0022]
According to this configuration, after the linear member is inserted between the two units while the housing is in the open state, if the units are overlapped and the housing is closed, the measurement auxiliary member naturally becomes the linear member. On the other hand, since the elastic member comes into contact with the elastic member from the outside in the radial direction, the device can be easily mounted on the linear member. Such a configuration is particularly advantageous in a case where the device has to be mounted in the middle of the linear member due to the presence of an obstacle.
[0023]
In addition, in this device, it is more preferable to have a driving means for relatively moving the casing along the linear member (claim 9).
[0024]
According to this configuration, it is possible to continuously measure the diameter of the linear member in the axial direction while automatically moving the linear member and the housing relative to each other. It is possible to perform it.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of the present invention will be described with reference to the drawings.
[0026]
FIG. 1 schematically shows a state in which the diameter measuring device according to the present invention is used for measuring the diameter of a wire rope for opening and closing a river gate. In this figure, reference numeral 1 denotes a gate body of a river gate, which is supported on a gate wall 2 so as to be able to move up and down. A hoisting device 6 is installed on the upper part 4 of the gate wall 2, and a wire rope 5 (hereinafter, simply referred to as a rope 5) derived from the hoisting device 6 is hung on a pulley 3 fixed to an upper part of the gate body. In the handed state, the end is fixed to the upper part 4 of the gate wall. Thus, when the rope 5 is wound or sent out by the operation of the hoisting device 6, the gate body 1 is moved up and down to open and close the river gate.
[0027]
As shown in the figure, the diameter measuring device includes a device main body 10 attached to a rope 5, a driving device 12 (driving means) for moving the device main body 10 along the rope 5, and, for example, on a gate wall. And a controller 14 for remotely controlling the apparatus main body 10 and the like and processing data output from the apparatus main body 10.
[0028]
As shown in FIG. 1, the drive device 12 includes a roller chain 12a (hereinafter, referred to as a chain 12a) suspended vertically between the vicinity of the gate body 1 and the upper part 4 of the gate in a state substantially parallel to the rope 5. And a drive device main body 12b integrally fixed to the device main body 10 with the chain 12a inserted.
[0029]
Although not shown, the drive device main body 12b includes a guide portion for guiding the chain 12a therein and a sprocket meshing with the chain 12a guided by the guide portion, and the sprocket is rotated by an electric motor. It is configured to move along the chain 12a by being driven. That is, by moving the driving device main body 12b along the chain 12a in this way, the device main body 10 fixed to the driving device main body 12b moves integrally with the rope 5.
[0030]
The electric motor of the driving device main body 12b incorporates position detecting means such as an encoder, for example, and a signal corresponding to the amount of movement of the device main body 10 is output to the control device 14 as the device main body 10 moves. It has become.
[0031]
2 and 3 schematically show the apparatus main body 10 mounted on the rope 5, FIG. 2 is a front view, and FIG. 3 is a plan view (A view in FIG. 2), respectively. The main body 10 is shown. In these figures, the drive device main body 12b is omitted for convenience (the same applies to FIGS. 4 and 5).
[0032]
As shown in these drawings, the apparatus main body 10 has a hollow cylindrical housing 20 having insertion holes 21 on upper and lower end surfaces.
[0033]
Guide rollers 26 for guiding the apparatus main body 10 along the ropes 5 are provided on the upper end surface and the lower end surface of the housing 20, respectively. In the illustrated example, four guides are provided on the upper end surface and the lower end surface, respectively. Rollers 26 are provided at equal intervals (equal intervals around the rope) so as to surround the rope 5 from all sides. Each guide roller 26 is rotatably supported by a mounting table 27, and a bolt 28 is inserted into an elongated hole 29 formed in the mounting table 27, and is fixed to the housing 20 by screwing. Therefore, by adjusting the fixing position of the mounting table 27 within the range of the elongated hole 29, the position of the guide roller 26 can be moved as indicated by the arrow in FIG. Have been.
[0034]
The housing 20 is composed of two identically shaped unit bodies 20a and 20b that are divided in the radial direction along the secant line Cl. Each of the unit bodies 20a and 20b is rotatably connected to each other about a longitudinal axis (an axis parallel to the rope 5) via a hinge 22. Thus, as shown by a solid line in FIG. The body 20) is configured to be in a closed state where the unit bodies 20a and 20b are overlapped with each other and an open state where the unit bodies 20a and 20b are separated from each other. Further, on the opposite side (the opposite side in the radial direction) of the hinge 22 in the housing 20, a stopper 24 is provided, and the unit 24 can be locked in the closed state by the stopper 24. Have been.
[0035]
Although the housing 20 has a divided structure including the unit bodies 20a and 20b as described above, in the following description, for convenience, the unit bodies 20a and 20b are not distinguished unless particularly necessary. The case 20 will be described.
[0036]
4 and 5 are cross-sectional views showing the internal structure of the apparatus main body 10. FIG. 4 is a longitudinal section, and FIG. In these figures, the guide roller 26 is omitted for convenience.
[0037]
As shown in these figures, a pair of distance detecting means 32 (referred to as first distance detecting means 32) arranged on both sides in the radial direction with the rope 5 interposed therebetween in the apparatus main body 10; A pair of distance detecting means 33 (referred to as second distance detecting means 33), which are arranged at 90 ° in the circumferential direction (around the rope) with respect to the detecting means 32 and are also disposed on both sides in the radial direction with the rope 5 interposed therebetween. It has been incorporated.
[0038]
Each of the distance detecting means 32 and 33 has a common configuration including a leaf spring 34 (measurement auxiliary member) that forms a measurement surface by contacting the rope 5 and a laser displacement gauge 38 (distance sensor). ing.
[0039]
The leaf spring 34 has a vertically elongated strip shape formed of spring steel, and is bent in an arc shape from the outside in the radial direction of the housing 20 to the inside as shown in FIG. It is supported by the housing 20 in this state. Specifically, support sockets 35 rotatable around an axis 36 orthogonal to the rope 5 are provided near the upper and lower inner wall surfaces of the housing 20, and upper and lower ends of a leaf spring 34 are inserted into these support sockets 35, respectively. As a result, the leaf spring 34 is supported in a state of being bent in an arc shape as described above and having a certain degree of flexibility. In the state shown in FIG. 2 in which the apparatus main body 10 is attached to the rope 5, the top of the arc-shaped bent portion is pressed against the rope 5 from the outside thereof so as to elastically contact the rope 5. Is configured. The surface opposite to the contact surface (the left and right outer surfaces in FIG. 4) forms a measurement surface by the laser displacement meter 38. In the present embodiment, when the leaf spring 34 is pressed against the rope 5 as described above, the contact surface (pressing surface) of the leaf spring 34 becomes a strand constituting the rope 5 as shown in FIG. The length and supporting position of the leaf spring 34 in the longitudinal direction, or the relative positional relationship between the rope 5 and the leaf spring 34 are set so as to straddle two strands 5a that are adjacent to each other in the longitudinal direction of the rope. I have.
[0040]
The laser displacement meter 38 has, for example, a red semiconductor laser displacement diameter, has a laser light irradiation unit and a light receiving unit, irradiates the laser light from the irradiation unit, reflects the laser light on the measurement surface, and enters the light receiving unit. The distance from the laser displacement meter 38 to the measurement surface is measured in a non-contact manner based on the light receiving position, and an electric signal corresponding to the distance is output to the control device 14. The laser displacement gauge 38 is arranged on the opposite side of the rope 5 with respect to the leaf spring 34 (outside the leaf spring 34 in the radial direction), and corresponds to the top of the leaf spring 34 bent in an arc shape. Is fixed to the inner wall surface of the housing 20 so as to irradiate a laser beam to a position where the laser beam is to be emitted.
[0041]
Each of the first distance detecting means 32 is arranged such that the optical axis of the laser beam emitted from the laser displacement meter 38 passes through the axis of the rope 5 and is located on a common line segment orthogonal to the longitudinal direction of the rope 5. Are attached to the housing 20 so as to face each other. Similarly, each of the second distance detecting means 33 is also attached to the housing 20.
[0042]
As shown in FIG. 5, each of the pair of first distance detecting means 32 and the pair of second distance detecting means 33 is configured such that each of the means 32 and 33 on one side is assembled to the unit body 20a on one side of the housing 20. Each of the means 32 and 33 on the other side is assembled to the unit body 20b on the other side of the housing 20. As a result, when the apparatus main body 10 is opened, the first distance detecting means 32 and the second distance detecting means 33 are separated from each other, and each of the first distance detecting means 32 and each of the second distance detecting means are separated. 33, the rope 5 can be easily interposed between the apparatus main body 10 and the rope 5 can be easily taken out from this state. ing.
[0043]
Although not shown, the apparatus main body 10 contains devices related to the distance detecting means 32 and 33 such as an amplifier of the laser displacement meter 38 and an A / D converter.
[0044]
The control device 14 controls the device body 10 and the drive device 12 in an integrated manner, and includes a power source for the device body 10 and the like, various drivers, an operation panel, and the like, and a laser displacement of each of the distance detecting means 32, 33. An arithmetic unit (arithmetic means) for calculating the diameter of the rope 5 based on the measurement data output from the total 38 and a storage device for storing the calculation result are included.
[0045]
Here, a method for measuring the diameter of the rope 5 according to the present invention (calculation of the diameter of the rope 5 by the arithmetic device) will be described with reference to FIG.
[0046]
In this device, a pair of first distance detecting means 32 (second distance detecting means 33) arranged opposite to each other with the rope 5 interposed therebetween is pressed against the rope 5 by the laser displacement meter 38, respectively. The distances L1 and L2 to the leaf spring 34 are measured. When the distances L1 and L2 from the laser displacement meter 38 to the leaf spring 34 are thus determined, the distance L between the laser displacement meters 38 of each first distance detecting means 32 and the plate thickness t of the leaf spring 34 are fixed values (known values). Therefore, the diameter D of the rope 5 can be obtained based on the following equation.
D = L- (2t + L1 + L2)
[0047]
Therefore, the arithmetic unit stores the distance L between the laser displacement meters 38 of each first distance detecting means 32 (each second distance detecting means 33) and the thickness t of the leaf spring 34 in the internal storage means as known information in advance. When the measurement data (distances L1 and L2) from each laser displacement meter 38 is input, the distances L1 and L2 and the known information stored in the storage means (that is, the distance L and plate The diameter D of the rope 5 is calculated based on the plate thickness t) of the spring 34.
[0048]
Note that, as described above, the apparatus main body 10 is provided with the pair of one-distance detecting means 32 and the pair of second-distance detecting means 33 so as to be shifted by 90 ° around the rope. By performing arithmetic processing based on the measurement of the distances L1 and L2 by the distance detecting means 32 and 33, the diameters D1 and D2 in two directions orthogonal to each other are calculated. Then, the result is stored in the storage device in association with the information on the movement amount output from the encoder of the drive device main body 12b.
[0049]
Next, the operation of measuring the diameter of the rope 5 using the diameter measuring device configured as described above will be described.
[0050]
First, as a preparation work, the driving device 12 is installed in a state where the driving device main body 12b is detached from the device main body 10. Specifically, in a state where the chain 12a is inserted into the drive device main body 12b, the chain 12a is suspended vertically between the vicinity of the gate main body 1 and the upper part of the gate wall 4 in a state substantially parallel to the rope 5. .
[0051]
Next, the device main body 10 is attached to the rope 5. In this mounting, the fastener 24 is released to open the apparatus main body 10 as shown by a two-dot chain line in FIG. 3, and in this state, the apparatus main body 10 is covered from the outside of the rope 5 and then the apparatus main body 10 is This is performed by setting the device in a closed state, stopping the metal fitting 24 and locking the device in the closed state. In this manner, the rope 5 is inserted into the apparatus main body 10 through the insertion hole 21 as shown in FIGS. 2 and 3, and inside the rope 5, as shown in FIGS. Each of the leaf springs 34 of the detection means 32 and 33 is pressed against the rope 5.
[0052]
When the attachment of the apparatus main body 10 to the rope 5 is completed, the drive apparatus main body 12b is fixed to the apparatus main body 10 by a connecting member such as a bolt and a nut, and the apparatus main body 10 is disposed near the pulley 3. This completes the preparation for the measurement operation.
[0053]
When the work preparation is completed, the measurement is started by moving the device main body 10 at a constant speed along the rope 5 by driving the driving device main body 12b. In this way, the distances L1 and L2 from the laser displacement gauge 38 to the leaf spring 34 are continuously detected with the movement of the apparatus main body 10, and the data is output to the arithmetic unit. Then, the arithmetic device calculates the diameters D1 and D2 of the rope 5 based on the distances L1 and L2 and the known data (interval L and thickness t), and calculates the obtained diameters D1 and D2 together with output information from the encoder. The data is sequentially stored in the storage device.
[0054]
When the diameter measurement of the rope 5 is completed by moving the apparatus main body 10 to the upper end of the rope in this way, the driving apparatus main body 12b is driven to reverse to move the apparatus main body 10 to the vicinity of the pulley 3, and then the reverse of the above-described preparation work By removing the apparatus main body 10 and the like from the rope 5 in the procedure described above, a series of diameter measuring operations is completed. In this measurement operation, for example, the diameters D1 and D2 of the rope 5 may be monitored, and the measurement of a specific portion may be performed a plurality of times by reciprocating the apparatus main body 10 as necessary. The diameter measurement may be performed twice over the entire rope 5 by performing the diameter measurement also when returning the device main body 10 from the upper end to the vicinity of the pulley.
[0055]
According to the above-described diameter measuring device (method), the device main body 10 is attached to the rope 5 as described above, and is moved along the rope 5 to continuously measure the diameter of the rope 5 in the longitudinal direction. Can be done automatically. In addition, as described above, the leaf spring 34 is pressed against the rope 5 and the distances L1 and L2 to the leaf spring 34 are measured to determine the diameter of the rope 5, so that the convex portion of the unevenness of the strand 5a is used as a reference. Accurate diameter measurement can be performed. Therefore, the diameter measuring operation of the rope 5 can be performed very efficiently as compared with the conventional primitive method using calipers. Further, since there is no need for the worker to go up to a high place to perform the measurement work, there is also an effect that the worker can be released from the highly dangerous work.
[0056]
In the present embodiment, the measurement surface is formed by the leaf spring 34 and the measurement is performed by the laser displacement meter 38. At this time, as described above (as shown in FIG. 7A), the leaf spring 34 , Among the strands 5a constituting the rope 5, it is configured so as to straddle two strands 5a adjacent to each other in the longitudinal direction of the rope, so that a reasonable configuration ensuring assemblability and functionality is achieved. There is also an effect. That is, for example, a state in which the leaf spring 34 is pressed against one strand 5a as shown in FIG. 7B, or three pressing surfaces of the leaf spring 34 as shown in FIG. It is also conceivable to configure so as to straddle (or more than) the strand 5a. However, in the case of FIG. 7B, the leaf spring 34 is not sufficiently pressed against the rope 5, so that the leaf spring 34 may be easily separated from the rope 5 due to vibration or the like. In addition, as a result of the reduced contact area, the range to be irradiated with the laser beam also becomes narrower, and the assemblability of the laser displacement gauge 38 may be deteriorated. On the other hand, in the case of FIG. 7C, the leaf spring 34 is sufficiently pressed against the rope 5 and the contact area is large, so that there is no such problem as described above. It is conceivable that the deterioration of the leaf spring 34 is shortened and the maintenance cycle of the leaf spring 34 is shortened. Therefore, in both cases, it is difficult to achieve both assemblability and functionality. On the other hand, in the case of FIG. 7A, since the pressing pressure and the area with respect to the rope 5 are both appropriate, the range to be irradiated with the laser beam is widened to some extent, and the mounting of the laser displacement gauge 38 is highly accurate. Is not required, and wear of the leaf spring 34 can be suppressed. Therefore, a rational configuration in which assemblability and functionality are well ensured is achieved.
[0057]
Further, since the distance to the leaf spring 34 is measured by the non-contact type laser displacement meter 38 as described above, there is little effect on the measured value due to vibration during the measurement, and the durability is improved. There is also.
[0058]
In the apparatus body 10, since the leaf spring 34 is brought into contact with the rope 5 as described above, it is necessary to replace the leaf spring 34 when deterioration occurs due to wear. In addition, if the diameter of the rope 5 is different, it is necessary to replace the rope 5 with a leaf spring 34 having a different length so that the leaf spring 34 can appropriately contact with the diameter, as described above. Since the plate spring 34 is configured to be bent in an arc shape and used, there is an advantage that such replacement of the plate spring 34 can be easily performed. That is, even if the leaf spring 34 and the support socket 35 are not fixed using fixing means such as screws, the leaf spring 34 does not fall out of the support socket 35 due to the elastic force due to the bending in a normal use state. Therefore, the leaf spring 34 can be supported only by inserting the end of the leaf spring 34 into the support socket 35. Therefore, when necessary, there is an advantage that the leaf spring 34 can be easily replaced by simply inserting and removing the leaf spring 34 with respect to the support socket 35.
[0059]
Next, a second embodiment of the present invention will be described. Since the basic configuration of the diameter measuring device of the second embodiment is common to that of the first embodiment, in the following description, only differences from the first embodiment will be described in detail. To
[0060]
FIG. 8 is a longitudinal sectional view showing the device main body 10 of the diameter measuring device according to the second embodiment, and corresponds to FIG. 4 of the first embodiment.
[0061]
The apparatus main body 10 of the second embodiment differs from the first embodiment in the configuration of the distance detecting means 32 and 33 in the following points. That is, in the distance detecting means 32, 33 of the second embodiment, the rocking plate 42 is provided instead of the leaf spring 34 as a member forming the measurement surface. As shown in FIG. 9 and FIG. 9, the rocking plate 42 is attached to the distal end (lower end) of an arm 44 hanging from the vicinity of the upper wall surface of the housing 20 via a shaft 43 orthogonal to the rope 5 around the axis. They are connected in a rotatable state. A base end (upper end) of the arm 44 is supported by the housing 20 so as to be rotatable around the shaft 43 via a shaft 45 parallel to the shaft 43, and a torsion spring inserted through the shaft 45. The resilient force of 46 causes the tip to be urged in a direction approaching the rope 5 (clockwise in FIG. 9), so that the rocking plate 42 is elastically pressed against the rope 5 from outside. It has become.
[0062]
Then, as shown in FIG. 8, in a state where the rocking plate 42 is pressed against the rope 5, a measurement surface is formed by a surface on the opposite side (the right surface in FIG. 9) to the pressed surface. The laser beam is emitted from the laser displacement meter 38.
[0063]
The basic measuring method of the diameter measuring apparatus of the second embodiment is exactly the same as that of the first embodiment, and the thickness t of the oscillating plate 42 and the distance L of the laser displacement gauge 38 are different. Is used as known information, and the diameter of the rope 5 can be obtained by the above equation based on the known information and the distances L1 and L2 to the rocking plate 42 detected by the laser displacement meter 38. Therefore, the same effects as those of the diameter measuring device according to the first embodiment can be obtained.
[0064]
Next, a third embodiment of the present invention will be described. Since the basic configuration of the diameter measuring device of the third embodiment is also common to the first embodiment, in the following description, only differences from the first embodiment will be described in detail. To
[0065]
10 and 11 are longitudinal sectional views showing the apparatus main body 10 of the diameter measuring apparatus according to the third embodiment, and FIG. 10 corresponds to FIG. 4 of the first embodiment.
[0066]
The apparatus main body 10 of the third embodiment differs from the first embodiment in the configuration of the distance detecting means 32 and 33 in the following points. First, in the third embodiment, the distance detecting means 32 and 33 are offset in the longitudinal direction of the rope 5 as shown in FIG. This is because the distance detecting means 32, 33 adopts a configuration as described below, and therefore cannot physically adopt the arrangement configuration as in the first and second embodiments.
[0067]
In the distance detecting means 32 and 33 of the third embodiment, instead of the leaf spring 34 as a member forming the measurement surface, a detection member 50 (measurement auxiliary member) movable in a direction orthogonal to the longitudinal direction of the rope 5. And an eddy current sensor 58 is provided instead of the laser displacement meter 38.
[0068]
The detection member 50 has a measurement plate 52 (detection section) forming a measurement surface by the eddy current sensor 58 and a guide roller 54 (roller member). It is configured to come in contact with from.
[0069]
The detecting members 50 of the first distance detecting means 32 (the second distance detecting means 33) are movably mounted on common guide rails 53 extending in a direction orthogonal to the ropes 5, respectively. Are connected via As a result, the detecting members of the first distance detecting means 32 (the second distance detecting means 33) are urged in a direction approaching each other, and as shown in FIGS. Each detection member 50 is elastically pressed against the rope 5 through the intermediary. The guide rail 53 supporting each detection member 50 is fixed to the housing 20 via the fixing member 51.
[0070]
The eddy current sensor 58 detects the distance from the eddy current sensor 58 to the measurement plate 52 based on a change in coil voltage due to the action of an eddy current demagnetizing field induced on the surface of the measurement plate 52. Are provided to face the measurement plate 52. The eddy current sensor 58 of each first distance detecting means 32 (each second distance detecting means 33) is assembled to a common fixing member 60, and is fixed to the housing 20 via the fixing member 60.
[0071]
Although the diameter measuring apparatus of the third embodiment has a different configuration from the first embodiment in the above-described points, the basic measuring method is exactly the same as the apparatus of the first embodiment.
That is, in the detection member 50, the distance (t ') from the measurement surface of the measurement plate 52 (the surface on the eddy current sensor side) to the contact portion of the guide roller 54 with the rope 5 is a fixed value. Using the distance L between the current sensors 58 as known information, the diameters D1 and D2 of the rope 5 can be obtained from the following equation based on the known information and the distances L1 and L2 to the measurement plate 52 detected by the eddy current sensor 58. .
D1 (D2) = L− (2t ′ + L1 + L2)
[0072]
Therefore, in the diameter measuring device of the third embodiment, the same effect as that of the diameter measuring device of the first embodiment can be obtained.
[0073]
The diameter measuring device described above is an embodiment of the diameter measuring device according to the present invention, and the specific configuration thereof can be appropriately changed without departing from the gist of the present invention. Such a configuration can be adopted.
[0074]
For example, in the first to third embodiments, the leaf spring 34, the swing plate 42, and the detection member 50 are used as the measurement auxiliary members according to the present invention, respectively. Any configuration may be used as long as it can elastically form a measurement surface of a distance sensor such as the laser displacement meter 38. However, if the configuration is the leaf spring 34 bent in an arc shape as in the first embodiment, the configuration of the measurement assisting member is extremely simple, which is advantageous in simplifying the configuration and reducing the cost. is there.
[0075]
In each of the above embodiments, the laser displacement meter 38 or the eddy current sensor 58 is applied as a distance sensor. However, a contact type displacement sensor may be employed in addition to such a non-contact type sensor. .
[0076]
In each of the above embodiments, two sets of distance detecting means 32 and 33 are provided to measure diameters in two directions perpendicular to each other. You may comprise so that a diameter may be measured. However, it goes without saying that measuring the diameter in two directions can increase the reliability of the measurement result.
[0077]
Further, in the present embodiment, the apparatus main body 10 and the like are configured to be remotely operated by the control device 14 provided separately from the apparatus main body 10. In this case, the operation of the apparatus main body 10 and the like by the control device 14 is performed by a wire. It may be an operation or a wireless operation. Further, by mounting the control device 14 on the apparatus main body 10, the self-propelled apparatus main body 10 may be configured by fully automatic control.
[0078]
Further, in the present embodiment, the diameter measuring device according to the present invention has been described by taking the case of measuring the wire rope 5 as an example, but the present invention is of course also applied to the diameter measurement of a linear member other than the wire rope 5. It goes without saying that you can do it.
[0079]
【The invention's effect】
As described above, according to the present invention, a pair of measurement auxiliary members are brought into contact with the linear member from the outside in the radial direction, and are arranged on the opposite sides of the linear member with respect to the measurement auxiliary member. The distance to the measurement auxiliary member is detected by the provided distance sensor, the detection value by each of the distance sensors, and the distance from the contact position of the measurement auxiliary member to the linear member to the detection position of the measurement auxiliary member by the distance sensor. Since the diameter of the linear member is obtained based on the known information including the arrangement interval between the two distance sensors, the diameter of the linear member can be easily measured without using calipers. In addition, the distance to the measurement auxiliary member is detected in a state where the measurement auxiliary member is in elastic contact with the surface of the linear member, and the diameter of the linear member is determined based on the distance. It is possible to measure the diameter accurately even if it is required to perform measurement with reference to the projections among the surface irregularities caused by the above.
[0080]
In particular, a plate-shaped measurement auxiliary member is brought into contact with the linear member as a measurement auxiliary member, the distance to the surface opposite to the contact surface is detected by a distance sensor, and the thickness of the measurement auxiliary member and the arrangement of both distance sensors are measured. If the interval is known information and the diameter of the linear member is obtained by subtracting the detection value of each distance sensor and the plate thickness of each measurement auxiliary member from the arrangement interval of the two distance sensors, an error in the known information causes an error. This hardly occurs, and the reliability of the measured value can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a state where a diameter measuring device according to the present invention is used for measuring the diameter of a wire rope for opening and closing a river gate.
FIG. 2 is a front view showing a device main body of the diameter measuring device according to the first embodiment.
FIG. 3 is a plan view (a view in the direction of arrow A in FIG. 2) showing the apparatus main body.
FIG. 4 is a vertical cross-sectional view (a cross-sectional view taken along the line CC in FIG. 3) showing the apparatus main body.
FIG. 5 is a plan cross-sectional view (a cross-sectional view taken along the line BB in FIG. 4) showing the apparatus main body.
FIG. 6 is a schematic diagram illustrating a measuring method of the diameter measuring device.
FIG. 7 is a conceptual diagram showing a contact state of a leaf spring with a wire rope.
FIG. 8 is a longitudinal sectional view showing a device main body of a diameter measuring device according to a second embodiment.
FIG. 9 is an enlarged view of a main part of FIG. 8, showing a configuration of a distance detecting means.
FIG. 10 is a longitudinal sectional view showing an apparatus main body of a diameter measuring apparatus according to a third embodiment.
11 is a longitudinal sectional view showing the apparatus main body ((a) is a sectional view taken along line DD in FIG. 11, and (b) is a sectional view taken along line EE in FIG. 11).
[Explanation of symbols]
5 wire rope (linear member)
10 Device body
12 Drive
14 Control device
20 case
21 insertion hole
32 first distance detecting means
33 Second distance detecting means
34 leaf spring (measurement auxiliary member)
38 Laser displacement meter (distance sensor)

Claims (9)

A pair of distance sensors respectively disposed on the opposite side of the linear member with the pair of measurement auxiliary members being elastically in contact with the linear member from the radial outside thereof with the measurement auxiliary member interposed therebetween. The distance from the sensor to a predetermined detection position of the measurement auxiliary member is detected, the distance from the contact position of the measurement auxiliary member to the linear member to the detection position of the measurement auxiliary member by the distance sensor, and the both distance sensors A method for measuring the diameter of the linear member based on known information including an arrangement interval of the distance and a detection value of each of the distance sensors. The method for measuring the diameter of a linear member according to claim 1,
The plate-shaped measurement auxiliary member is brought into contact with the linear member as the measurement auxiliary member, and the distance to the surface opposite to the contact surface is detected by the distance sensor. The arrangement interval is known information, and the diameter of the linear member is obtained by subtracting the detection value of each distance sensor and the thickness of each measurement auxiliary member from the arrangement interval of both distance sensors. Diameter measurement method. A pair of measurement auxiliary members elastically in contact with the linear member from the outside in the radial direction, and each of the auxiliary members is disposed on the opposite side to the linear member across the measurement auxiliary member in the radial direction, A pair of non-contact type distance sensors for detecting the distance of the measurement auxiliary member to a predetermined detection position, and the distance from the contact position of the measurement auxiliary member to the linear member to the detection position of the measurement auxiliary member by the distance sensor Storage means for storing known information including an arrangement interval of the distance sensors; and calculation means for calculating a diameter of the linear member based on the known information and a value detected by each of the distance sensors. A diameter measuring device for a linear member. The diameter measuring device for a linear member according to claim 3,
The measurement auxiliary member is a leaf spring that extends in the axial direction along the linear member, and is supported in a state where the linear member is bent in an arc shape from the radially outer side to the inner side. The arc-shaped bent portion is provided so as to be pressed against the linear member, and the distance sensor is configured to detect the detection position up to a surface opposite to the contact surface of the leaf spring with respect to the linear member. The arithmetic means is provided so as to detect a distance, and the detection value of each distance sensor and the leaf spring of each leaf spring are determined from the distance between the two distance sensors as the known information based on the thickness of the leaf spring and the distance between the two leaf sensors. A diameter measuring device for a linear member, wherein the diameter of the linear member is obtained by subtracting a plate thickness. The diameter measuring device for a linear member according to claim 3 or 4,
The measuring member is configured to measure a diameter of a wire rope as a linear member such that a contact surface with the wire rope straddles two strands adjacent to each other in the longitudinal direction among the strands constituting the wire rope. A diameter measuring device for a linear member, wherein the diameter measuring device is provided in the device. The diameter measuring device for a linear member according to claim 3,
The measurement auxiliary member is supported so as to be displaceable in a radial direction of the linear member, and has a detection unit by the distance sensor on the opposite side to the linear member in the same direction, and the linear member has It has a guide roller member for contact, and is configured so that the roller member can be brought into contact with the linear member by being urged by an urging means for applying an urging force to the linear member side. Measuring device for linear members. The diameter measuring device for a linear member according to any one of claims 3 to 6,
A plurality of sets of the pair of measurement auxiliary members and the pair of distance sensors are provided, and each set is arranged at a different angular interval around the linear member, so that the diameter of the linear member in different directions is provided. A diameter measuring device for a linear member, characterized in that it is configured to be able to measure the diameter of a linear member. The diameter measuring device for a linear member according to any one of claims 3 to 7,
A housing through which the linear member is inserted is provided, and the pair of measurement auxiliary members and the pair of distance sensors are incorporated inside the housing. A pair of unit bodies connected to be openable and closable along a secant line of which the linear member can be inserted into the housing through the open portion in the open state, and the housing can be inserted with the linear member inserted. By closing the body, the measurement auxiliary member and the distance sensor are incorporated so that the pair of measurement auxiliary members each elastically contact the linear member from the radial outside thereof. A diameter measuring device for a linear member. The diameter measuring device for a linear member according to claim 8,
An apparatus for measuring the diameter of a linear member, comprising: a driving unit for relatively moving the housing along the linear member.

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