JP5139152B2 - Measuring method, measuring member and measuring device of actual rotational torque of buried machine - Google Patents

Description

  The present invention provides a method for measuring an actual rotational torque applied to a steel pipe pile embedded in an embedding machine that is buried while rotating the steel pipe pile, and a measurement member that is advantageous for use in carrying out this measurement method. And a measuring apparatus.

  In the case of a steel pipe pile, the driving device of the burying machine is engaged with an engaging portion provided at the upper end portion of the steel pipe pile, and thrust is applied while being rotated by the driving device and is buried in the ground. In steel pipe piles buried by rotation in this way, excessive twisting may occur when excessive rotational torque is applied, so it is important to manage the rotational torque actually applied to the steel pipe piles. is there.

  For this reason, embedding a steel pipe pile using an embedding machine equipped with a torque sensor (for example, Torqueducer (registered trademark)) has been performed. If a buried machine equipped with such a torque sensor is not used, the rotational torque is managed by calculating the torque from the hydraulic oil pressure and the diameter of the steel pipe pile supplied to the drive device that applies the rotational torque to the steel pipe pile. doing.

  However, the torque sensor is expensive, and there is a problem that the economic burden becomes too large if it is installed in all buried machines. In addition, it can be considered to improve the operating rate by attaching / detaching such a torque sensor to / from a buried machine to actually reduce the economic burden, but in this case, it takes much time to attach / detach the torque sensor. The problem that it requires is derived.

  Moreover, when calculating a torque from the pressure of the hydraulic fluid supplied to a drive device, there exists a problem that it is difficult to calculate accurately the rotational torque currently provided to the steel pipe pile.

  An object of the present invention is to provide a measuring method capable of easily measuring an actual rotational torque applied to a steel pipe pile, a measuring member advantageous for use in carrying out this measuring method, and a measuring device. It is to provide.

  In the following description, “actual rotational torque” means the torque actually applied to the steel pipe pile, the torque actually applied to the measurement member, and the actual rotation output from the output unit of the measuring device. The torque regarded as the torque and displayed on the display unit is referred to as the torque other than the above.

In order to solve the above problems, a method for measuring an actual rotational torque according to the present invention is a method for measuring an actual rotational torque of an embedding machine that rotates and embeds a steel pipe pile, which is made of a steel pipe and has a strain gauge on a trunk portion. The measurement member is attached, and the lower end of the measurement member is fixed and erected, and the driving device for rotating the steel pipe pile of the buried machine is attached to the upper end of the standing measurement member, and the driving device is driven. While the rotational torque is applied to the measuring member, the rotational torque applied to the measuring member is measured from the strain amount of the measuring member detected by the strain gauge.

  In the method for measuring the actual rotational torque, it is preferable to measure the display output of the driving device in correspondence with the rotational torque applied to the measurement member measured from the amount of distortion of the measurement member.

  The measuring member according to the present invention is a measuring member used when measuring the actual rotational torque of an embedding machine that rotates and embeds a steel pipe pile, and is composed of a steel pipe and is embedded in the ground at the lower end. An engaging portion that engages with the supporting fixing member is formed, and a mounting portion for mounting the steel pipe pile driving device of the buried machine to be measured is formed at the upper end portion, and a trunk portion between the lower end portion and the upper end portion is formed. A strain gauge is attached.

  Moreover, the 1st measuring apparatus for measuring the actual rotational torque which concerns on this invention is an apparatus which measures the actual rotational torque of the burying machine which embeds by rotating a steel pipe pile, Comprising: It consists of a steel pipe and is underground in a lower end part. An engaging portion is formed to engage with a fixed member for supporting rotational torque embedded in the mounting portion, and a mounting portion for mounting a steel pipe pile driving device of an embedding machine to be measured is formed at the upper end portion between the lower end portion and the upper end portion. A measuring member having a strain gauge attached to its body, and a rotational torque applied to the measuring member based on a strain amount connected to the strain gauge attached to the body of the measuring member and output from the strain gauge And an arithmetic device that calculates

  The second measuring device includes a recording device that records the display output of the driving device and the rotational torque calculated by the calculating device in association with each other in the first measuring device.

  Further, the third measuring device displays the rotational torque applied to the measuring member calculated in advance by the arithmetic device corresponding to the display output of the driving device in the second measuring device. A storage unit that is stored as information, and an output unit that outputs rotational torque information corresponding to the display output input using the display output / rotational torque correspondence information when the display output of the driving device is input. Is.

  The fourth measuring device includes a recording device that records the display output of the driving device and the amount of strain output from the strain gauge attached to the measuring member in correspondence with each other in the first measuring device. It is.

  Further, the fifth measuring device displays, in the fourth measuring device, the strain amount output in advance from the strain gauge attached to the measuring member corresponding to the display output of the driving device. A storage unit that is stored as an output unit, and an output unit that outputs rotational torque information corresponding to the display output input using the display output / distortion amount correspondence information when the display output of the driving device is input. It is.

  Further, the sixth measuring device displays the rotational torque information output from the output unit as the actual rotational torque output from the driving device in the third measuring device or the fifth measuring device. Part.

  In the method for measuring the actual rotational torque according to the present invention, the actual rotational torque of the buried machine is measured using a measuring member having a strain gauge attached to the trunk portion, so that the actual rotational torque can be easily measured. That is, when the lower end of the measuring member is fixed and erected, and the driving device of the buried machine is mounted on the upper end and the driving device is driven, the actual rotational torque of the driving device is applied to the measuring member, resulting in torsional distortion. Since the strain amount at this time is detected by the strain gauge, the rotational torque acting on the measurement member calculated from the detected strain amount and the torsional rigidity of the measurement member, that is, the actual rotational torque can be measured. .

  Therefore, when a measurement member is manufactured by setting conditions such as a cross-sectional shape, a dimension, and a material that can exhibit preset torsional rigidity, or when using an existing YATCO as a measurement member, for example, By calculating the torsional rigidity by strictly measuring the cross-sectional shape, dimensions, material, etc., the rotational torque is calculated based on the strain amount of the measurement member detected by the strain gauge attached to the body of these measurement members. Thus, the actual rotational torque applied to the measuring member can be measured.

  As described above, since an existing yatco can be used as a measuring member, when such a yatco is used, it is possible to easily measure the actual rotational torque of the embedding machine, and it is actually buried. The actual rotational torque applied to the steel pipe pile can be easily measured.

  In particular, the display output of the driving device of the buried machine and the actual output torque are measured by matching the display output of the driving device with the actual rotational torque applied to the measurement member measured from the strain amount of the measurement member. The rotational torque can be made to correspond. For this reason, after making both correspond once, the value of the actual rotational torque currently given to the steel pipe pile can be managed by monitoring the display output of a drive device.

  In the measuring member according to the present invention, the embedding machine can be engaged with a fixing member embedded in the ground via an engaging portion formed at the lower end portion, and can be engaged through an attachment portion formed at the upper end portion. It can be attached to the drive device. For this reason, when the driving device is driven, the measurement member is fixed by engaging the fixing member for supporting the rotational torque at the lower end portion, so that a torsional distortion occurs at the lower end portion as a fixing point. Can be detected by a strain gauge attached to the body.

  In the first measuring device according to the present invention, the engaging portion is formed at the lower end portion of the steel pipe, the mounting portion for mounting the driving device of the buried machine is formed at the upper end portion, and the strain gauge is attached to the trunk portion. A measuring member connected to the strain gauge and an arithmetic device for calculating the rotational torque applied to the measuring member based on the amount of strain output from the strain gauge. By mounting and driving, the actual rotational torque can be applied to the measuring device, and the distortion generated in the measuring member according to the applied actual rotational torque is detected by a strain gauge and the rotational torque is calculated by an arithmetic device. The actual rotational torque can be measured by calculation.

  Further, the second measuring apparatus according to the present invention has a recording device that records the display output of the driving device and the rotational torque calculated by the arithmetic device in correspondence with each other, so that the display when the driving device is driven is provided. The output and the calculated rotational torque can be recorded in correspondence.

  Further, in the third measuring apparatus according to the present invention, a storage unit that stores in advance the actual rotational torque applied to the measurement member calculated by the arithmetic device corresponding to the display output of the drive device as display output / rotational torque correspondence information. And an output unit for outputting rotational torque information corresponding to the display output inputted using the display output / rotational torque correspondence information when the display output of the drive device is inputted. Can output rotational torque information from the output unit based on the display output / rotational torque correspondence information stored in the storage unit. It can be used to control other devices.

  The fourth measuring apparatus according to the present invention includes a recording device that records the display output of the driving device and the amount of strain output from the strain gauge attached to the measuring member in association with each other, so that the driving device is driven. The display output at the time of recording and the amount of strain output from the strain gauge can be recorded in correspondence.

  Further, in the fifth measuring device according to the present invention, a storage unit that stores in advance the strain amount output from the strain gauge attached to the measurement member corresponding to the display output of the drive device as display output / strain amount correspondence information; An output unit that outputs rotational torque information corresponding to the display output inputted using the display output / distortion amount correspondence information when the display output of the drive device is inputted. Thus, the output torque can be output from the output unit based on the display output / distortion amount correspondence information stored in the storage unit, and the embedded torque can be controlled and other devices using this rotary torque information. It can be used to control the kind.

  Moreover, since the 6th measuring apparatus which concerns on this invention has a display part which displays the rotational torque information output from the output part as an actual rotational torque output from the drive device, it inputs the display output of a drive device. Thus, the rotational torque can be displayed as the actual rotational torque output from the drive device from the rotational torque calculated from the distortion amount of the measuring device or the distortion amount.

  Hereinafter, preferred embodiments of a method, a measuring member, and a measuring device for measuring an actual rotational torque according to the present invention will be described. FIG. 1 is a diagram for schematically explaining a measuring method for measuring an actual rotational torque and for explaining a configuration of a measuring member. FIG. 2 is a view for explaining how to attach the strain gauge. FIG. 3 is a diagram for explaining the configuration of the measuring apparatus. FIG. 4 is a diagram for explaining another configuration of the measuring apparatus. FIG. 5 is a diagram for explaining still another configuration of the measuring apparatus.

  First, the actual rotational torque measurement method and the configuration of the measurement member will be described with reference to FIG. In the method for measuring the actual rotational torque according to the present invention, the actual rotation torque is applied to the measurement member A that is fixed with the lower end fixed and the driving device B of the buried machine is attached to the upper end, and the actual rotation applied. The actual rotational torque is measured by detecting the amount of distortion of the measuring member A caused by the torque.

  In particular, when carrying out the method of measuring the actual rotational torque according to the present invention, by rotating and embedding the steel pipe pile with the measuring member A interposed between the steel pipe pile to be buried and the driving device B, It is possible to monitor the actual rotational torque applied to each steel pipe pile. Therefore, by preparing the measurement member A for each embedding machine, it is possible to manage the actual rotational torque applied to the steel pipe pile that is actually embedded.

  Further, instead of the steel pipe pile, the support C is buried and fixed in the ground, the measurement member A is engaged with the support C, and the actual rotation torque is applied by the drive device B, thereby driving. It is possible to monitor the actual rotational torque applied to the measuring member A from the device B. For this reason, it is possible to correct the display output of the drive device B by comparing the display output of the drive device B with the measured actual rotational torque. Therefore, it can also be used as a display output correcting means of the driving device B of the burying machine.

  As described above, when the measurement method according to the present invention is used as the display output correction means of the driving device B of the buried machine, a place having the support C and the measurement member A is prepared. It is possible to know the actual rotational torque from the corrected display output by periodically moving the buried machine to the above-mentioned place and correcting it without equipping each measuring machine with the measuring member A. .

  As the measuring member A, if the cross-sectional shape, cross-sectional dimension, and material are clear, the cross-sectional modulus can be calculated and the elastic coefficient can be known. From the measurement, the cross section is preferably circular.

  In particular, if the measuring member A has the same material and the same dimensions as the Yatsuko used when the steel pipe pile is buried deeply in the ground, the actual rotational torque is interposed directly between the steel pipe pile and the driving device B. This is advantageous in the case of measuring.

  The measuring member A shown in FIG. 1 is configured using a steel pipe, and the outer shape other than the length is formed in the same manner as the Yatco. An engaging portion 2 that engages with the support C is formed at the lower end portion 1a of the steel pipe 1 constituting the measuring device A, and an attachment portion 3 to which the driving device B of the buried machine is attached at the upper end portion 1b. Is formed. A strain gauge 5 is attached to the body portion 1c of the steel pipe 1.

In this embodiment, the steel pipe 1 constituting the measuring member A is made of STK490 (general structural carbon steel pipe), the outer diameter D is set to 26.74 cm, and the inner diameter d is set to 24.2 cm. In the steel pipe of this material, the elastic modulus E is set as 2100000 kg / cm ² . Moreover, the length of the pipe part from the engaging part 2 of the lower end part 1a to the end part of the upper end part 1b is set to 150 cm.

  The engaging portion 2 has a function of detachably engaging with the protrusion 11 provided on the upper end portion of the steel pipe pile portion 10 of the support C. When engaged with the protrusion 11, the support C Fixed. Moreover, this engaging part 2 is comprised so that attachment to the attachment part provided in the upper end part of the steel pipe pile which should be embed | buried is also possible. That is, the structure of the engaging portion 2 is configured to correspond to the structure of the mounting portion provided at the upper end portion of the steel pipe pile to be buried, and the upper end portion of the steel pipe pile portion 10 of the support C is formed of the steel pipe pile. It has the same structure as the upper end.

  In the present embodiment, the engaging portion 2 is provided at the upper end portion of the steel pipe pile portion 10 provided on the outer peripheral wall of the cap portion 2a configured to fit the upper end portion of the steel pipe pile portion 10 and the cap portion 2a. And a hook portion 2b that engages and engages the plurality of protrusions 11 with each other. Therefore, the measuring member A is attached to the support C and fixed by fitting the cap portion 2a of the engaging portion 2 so as to cover the steel pipe pile portion 10 and engaging the projection portion 11 with the hook portion 2b. Is possible.

  The mounting portion 3 has a function of mounting the drive device B in a detachable manner. In particular, since the driving device B engages with a mounting portion provided at the upper end portion of the steel pipe pile and applies an actual rotational torque to the steel pipe pile, the mounting portion 3 is provided with a mounting portion provided at the upper end portion of the steel pipe pile. (The protrusion 11 provided on the upper end portion of the steel pipe pile portion 10 of the support C). That is, the mounting portion 3 is configured by fixing a plurality of protrusions on the outer peripheral surface of the upper end portion 1b of the steel pipe 1 by means such as welding.

  The driving device B is configured to be attached to the measurement member A so as to apply an actual rotational torque to the measurement member A. In particular, the drive device B is configured to be able to embed the steel pipe pile in the ground by being attached to the upper end portion of the steel pipe pile and applying an actual rotational torque and thrust to the steel pipe pile. For this reason, the drive device B is mounted on a reader (not shown) constituting the burying machine, and is configured to be able to reciprocate linearly along the reader.

  The drive device B is generally configured as a hydraulic device using a hydraulic motor as a drive source, but is not necessarily a hydraulic device, and may be an electric device using an electric motor as a drive source. The drive device B is configured to be able to display the output of the drive device B, and is configured to be able to monitor the displayed output by an operator.

  The drive unit B includes an engaging portion 20 that engages with a mounting portion provided at the upper end of the steel pipe pile. That is, since the mounting portion provided at the upper end portion of the steel pipe pile has the same structure as the protrusion portion 11 provided at the upper end portion of the steel pipe pile portion 10 of the support C, the engaging portion 20 of the driving device B is Similar to the engaging portion 2 of the measuring member A, it has a cap portion 20a and a hook portion 20b.

  The support C has a function of fixing the measuring member A, and includes a fixing portion 13 and a steel pipe pile portion 10. The fixing portion 13 is buried and fixed in the ground, and the steel pipe pile portion 10 stands on the ground. Is provided. The fixing unit 13 is embedded in the ground and may be configured so as to be able to reliably hold the fixed state even when the maximum rotational torque applied to the measuring member A is applied. It is not a thing.

  In this embodiment, a steel plate cut into a rectangular shape as the fixing portion 13 is welded to the lower end portion of the steel pipe pile portion 10, and is embedded in the ground at a depth of about 260 cm. In addition, the fixing | fixed part 13 does not necessarily need to be this structure, It is also possible to utilize what embed | buried and fixed the steel pipe pile itself.

  Moreover, when the fixing | fixed part 13 is embed | buried, the steel pipe pile part 10 comprises about 50 cm-100cm on the ground, and comprises the support body C by making it stand. Moreover, when embedding an actual steel pipe pile, the buried steel pipe pile is not necessarily vertical. Therefore, the steel pipe pile part 10 should just stand up on the ground, and may be perpendicular | vertical or inclined.

  The strain gauge 5 is attached to the body 1c of the steel pipe 1 constituting the measuring member A. When the measuring member A is distorted according to the actual rotational torque applied from the driving device B, the strain gauge 5 detects this strain. Thus, it has a function of generating an electrical signal corresponding to the amount of distortion. For this reason, the strain gauge 5 needs to be able to accurately detect the strain of the steel pipe 1 according to the applied actual rotational torque.

  The number of strain gauges 5 attached to the body portion 1c is not particularly limited, and the measurement member A is the same regardless of whether one strain gauge 5 is attached or two or four strain gauges 5 are attached. It is possible to detect the actual rotational torque applied to the measuring member A by detecting the distortion of the measuring member A. In particular, when a plurality of strain gauges 5 are used, the signals output from the individual strain gauges 5 are averaged and processed, or the maximum and minimum values are excluded and averaged. This is advantageous because there are several options for handling.

  The strain gauge 5 is attached to the body portion 1c of the steel pipe 1 by attaching one strain gauge 5 at an angle of 45 degrees with respect to the axis of the steel pipe 1 and using the strain gauge 5 as a bridge (1 gauge method (2-wire method) As shown in FIG. 2A, two strain gauges 5 are attached to the steel pipe 1 with an inclination of 45 degrees with respect to the axis of the steel pipe 1 and bridges (2 gauges) are used. As shown in FIG. 5B, the four strain gauges 5 are separated from each other along the axis of the steel pipe 1 and are inclined at 45 degrees, and these strain gauges 5 are formed. Are used to form a bridge (4-gauge method (full bridge)), and these methods are preferably employed selectively.

  The means for attaching the strain gauge 5 to the body portion 1c of the steel pipe 1 is not particularly limited, and when the body portion 1c is distorted, an attachment method necessary for reliably detecting the strain is satisfied. It ’s fine. Further, it is preferable that the body 1c to which the strain gauge 5 is attached is waterproofed on the outer peripheral surface side of the strain gauge 5 and is coated with a relaxation material. By configuring the body portion 1c of the steel pipe 1 in this way, it is possible to measure the actual rotational torque by attaching the measuring member A directly to the upper end portion of the steel pipe pile not shown.

  Next, the procedure for measuring the actual rotational torque will be described. As shown in FIG. 1, the mounting portion 3 provided at the upper end of the measurement member A is mounted on the driving device B, and the driving device B is raised. Next, the measuring member A is opposed to the support C, and the engaging portion 2 provided at the lower end portion is engaged with the protruding portion 11 of the steel pipe pile portion 10.

  As described above, after connecting the support C, the measuring member A, and the driving device B, the driving device B is driven to apply the actual rotational torque in a predetermined direction to the measuring member A. At this time, the output of the driving device B is displayed on the buried machine and monitored by the operator. For this reason, the operator controls the driving device B while monitoring the display value.

  When the actual rotational torque is applied from the driving device B, the measuring device A has a lower end fixed, so that distortion caused by torsion occurs. This distortion is detected by the strain gauge 5 and a signal corresponding to the amount of distortion. Will occur. Therefore, the actual rotational torque can be measured by calculating the necessary rotational torque that causes the steel pipe 1 constituting the measuring member A to generate this distortion amount based on the detected strain amount.

  Then, while changing the actual rotational torque applied from the driving device B to the measuring member A, the rotational torque calculated based on the display of the driving device B and the strain amount of the measuring member A detected by the strain gauge 5 By comparing these, the display error of the driving device B can be confirmed and corrected.

  Further, when the measuring member A is directly connected to the upper end of the steel pipe pile, it is possible to measure the actual rotational torque applied to the steel pipe pile that is actually being buried in real time. For this reason, it becomes possible to manage the actual rotational torque given to each steel pipe pile.

  Next, a basic configuration of an apparatus for measuring the actual rotational torque by implementing the above-described actual rotational torque measurement method will be described. FIG. 3 is a block diagram for explaining an apparatus for calculating the actual rotational torque applied to the measuring member A by calculating the rotational torque based on the strain amount of the measuring member A detected by the strain gauge 5.

  In FIG. 3, reference numeral 31 denotes an arithmetic unit which is connected to the strain gauge 5 and rotates based on the strain amount when a signal corresponding to the strain amount of the measuring member A detected by the strain gauge 5 is input. The torque is calculated and the actual rotational torque applied to the measuring member A is measured.

In the present embodiment, the arithmetic unit 31 has a strain amount detected by the strain gauge 5 as ε, a Poisson's ratio as ν, a circumferential ratio: π, and a torsional section coefficient Zp: π (D ⁴ −d ⁴ ) / 16D. When the torque: T is calculated T = (ε × E × π (D ⁴ −d ⁴ )) / ((1 + ν) × 16 × D)
Is stored, and the aforementioned outer diameter D, inner diameter d, and elastic modulus E of the steel pipe 1 are previously input and stored. In addition, values of Poisson's ratio: ν and circularity ratio: π are input and stored in advance. Accordingly, the only variable is the strain amount: ε. When the strain amount: ε is input, the actual rotational torque: T can be calculated.

  Moreover, it is also possible to realize conversion from analog quantity to analog quantity without using a digital signal from a strain gauge to an analog instrument by using the arithmetic unit 31 as wired logic. In this case, the operation of variable parameters other than the distortion amount can be performed using a variable resistor, a switch, or the like.

  Next, the configuration of another measuring apparatus D will be described with reference to FIG.

  In FIG. 4, 32 is a display output display section of the drive device B, which calculates and displays the output of the drive device B from the pressure of the hydraulic oil supplied to the drive device B and generates an electrical signal. It is configured to be able to. Then, it is possible to confirm the actual rotational torque corresponding to the display output value from the generated electrical signal. It is also possible to use the electric signal as a control signal for the driving device B. Reference numeral 33 denotes a recording device including a storage unit 34 and an output unit 35, and 36 denotes an input device.

  The calculation device 31 and the display output display unit 32 are connected to the storage device 33, and the actual rotation torque applied to the measurement member A is changed by the drive device B, and the display output displayed on the display output display unit 32 at this time The recording device 33 records the rotation torque calculated by the calculation device 31 from the distortion amount of the measurement member A at this time.

  The display output of the display output display unit 32 of the drive device B as described above and the value of the rotational torque calculated from the arithmetic device 31 corresponding to the display output are stored in the recording device 33 as display output / rotational torque correspondence information. Stored in the unit 34.

  Therefore, for example, a measurement member A connected to the support C is attached to a drive device B of a specific buried machine at a measurement site such as a factory, and the rotation torque for each pressure is changed while changing the pressure of the hydraulic oil. By calculating and storing the value of the rotational torque corresponding to the display output in the storage unit 34 as display output / rotational torque correspondence information, the storage unit 34 stores the display output of the drive device B of the specific buried machine. The relationship with the rotational torque is stored.

  The display output / rotational torque correspondence information covers the entire output range of the drive device B, and when the display output value of the display output display unit 32 is input by the input device 36, the display output / rotation torque correspondence information The actual rotational torque output from the driving device B corresponding to the value of the display output can be output to the output unit 35.

  As described above, the display output of the display output display unit 32 of the driving device B and the value of the rotation torque calculated from the calculation device 31 corresponding to the display output are stored in the storage unit 34 as display output / rotation torque correspondence information. It is possible.

  Although not particularly limited, an output device such as a display or a printer (not shown) can be connected via the output unit 35 of the measuring device D.

  Therefore, when the measuring device D configured as described above is mounted on an embedded machine and used, the operator who operates the embedded machine monitors the display output display unit 32 of the drive device B and displays the current display as necessary. By inputting the output value from the input device 36, the output unit 35 outputs the rotational torque information corresponding to the input display output value, whereby the display output displayed on the display output display unit 32 is displayed. It is possible to confirm the actual rotational torque corresponding to the value of. Thus, even if it does not necessarily connect the measuring apparatus A to a steel pipe pile, it is possible to manage the real rotational torque provided for every steel pipe pile.

  Further, by using the electrical signal generated in the display output display unit 32 as an input signal, the output unit 35 outputs the rotational torque information corresponding to the input electrical signal, and is thereby displayed on the display output display unit 32. The actual rotational torque corresponding to the displayed output value can be confirmed, and the actual rotational torque applied to the steel pipe pile can be managed.

  Next, a configuration of a measuring device E which is a modification of the measuring device will be described with reference to FIG. The display output display unit 32 that constitutes the measuring device E, the calculation unit 31 that constitutes the recording unit 33, the storage unit 34, the output unit 35, and the input device 36 are the same as the measuring device D described above, and a description thereof is omitted. To do.

  The measuring apparatus E shown in FIG. 5 stores display output / strain amount correspondence information in which the display output of the display output display unit 32 of the driving device B and the strain amount output from the strain gauge 5 are associated with each other in the storage unit 34. This is different from the measuring device D described above.

  That is, the measuring device E displays the display output of the driving device B displayed on the display output display unit 32 and the strain amount output from the strain gauge 5 according to the actual rotational torque applied from the driving device B at this time. Corresponding display output / distortion amount correspondence information is stored in the storage unit 34, and when the display output value of the display output display unit 32 is input by the input device 36, the output of the display output input from the output unit 35 is displayed. Rotational torque information corresponding to the value is output, whereby the actual rotational torque corresponding to the value of the display output displayed on the display output display unit 32 can be confirmed.

  In the recording device 33, when a signal corresponding to the strain amount of the measuring member A detected by the strain gauge 5 is input, the calculation device 31 calculates the rotational torque based on the strain amount.

  Therefore, even when the measuring device E is mounted on a buried machine, the operator operating the buried machine monitors the display output display unit 32 of the driving device B, and displays the current display output as necessary. It is possible to confirm the actual rotational torque corresponding to the value of the display output displayed on the display output display unit 32 from the output unit 35 by inputting this value from the input device 36, which is applied to the steel pipe pile. It is possible to manage the actual rotational torque. Further, by using the electrical signal generated in the display output display unit 32 as an input signal, the output unit 35 outputs the rotational torque information corresponding to the input electrical signal, and is thereby displayed on the display output display unit 32. The actual rotational torque corresponding to the displayed output value can be confirmed, and the actual rotational torque applied to the steel pipe pile can be managed.

  The measuring devices D and E include a display unit (not shown) that displays the rotational torque information output from the output unit 35 as the actual rotational torque output from the drive device B. The configuration of the display unit is not particularly limited, and an analog or digital meter, display, or the like can be used.

  The method for measuring the actual rotational torque according to the present invention can measure the actual rotational torque applied to the measurement member A from the driving device B of the embedding machine with simple equipment, and at the embedding site of the steel pipe pile, Alternatively, it is advantageous to use in a factory or the like.

  Moreover, the measuring device according to the present invention is advantageous when measuring the rotational torque output from the driving device B of the burying machine, and is mounted on the steel pipe pile to be embedded by mounting it on the burying machine. By inputting the display output of the display output display unit 32 without connecting the actual rotational torque applied to the steel pipe pile, it is advantageous.

It is a figure explaining the structure of a measuring method and a measurement member. It is a figure explaining how to attach a strain gauge. It is a figure explaining the structure of a basic measuring apparatus. It is a figure explaining the structure of another measuring apparatus. It is a figure explaining the structure of another measuring apparatus.

Explanation of symbols

A measuring member B driving device C support D, E measuring device 1 steel pipe 1a lower end portion 1b upper end portion 1c trunk portion 2 engaging portion 2a cap portion 2b hook portion 3 mounting portion 5 strain gauge 10 steel tube pile portion 11 protrusion portion 13 fixing Part 20 engaging part 20a cap part 20b hook part 31 arithmetic device 32 display output display part 33 recording device 34 storage part 35 output part 36 input device

Claims (9)

A method for measuring the actual rotational torque of an embedding machine that embeds by rotating a steel pipe pile, comprising a measuring member comprising a steel pipe and having a strain gauge attached to the trunk, and fixing the lower end of the measuring member while standing The measuring member detected by the strain gauge is attached to the upper end of the measuring member that has been erected, and a driving device that rotates the steel pipe pile of the burial machine is attached, and the driving device is driven to apply rotational torque to the measuring member. A method for measuring an actual rotational torque of an embedded machine, wherein the rotational torque applied to the measurement member is measured from the amount. The actual performance of the embedding machine according to claim 1, wherein the display output of the driving device and the rotational torque applied to the measurement member measured from the distortion amount of the measurement member are measured in correspondence with each other. Measuring method of rotational torque. A measuring member used to measure the actual rotational torque of an embedding machine that rotates and embeds steel pipe piles. The measuring member consists of a steel pipe and engages with a fixed member for supporting rotational torque embedded in the ground at the lower end. An engagement part was formed, a mounting part for mounting the steel pipe pile drive device of the buried machine to be measured was formed at the upper end part, and a strain gauge was attached to the trunk part between the lower end part and the upper end part. Characteristic measuring member. A device that measures the actual rotational torque of an embedding machine that rotates and embeds steel pipe piles, and is formed of a steel pipe and has an engaging portion that engages a fixed member for supporting rotational torque embedded in the ground at the lower end A measuring member in which a mounting portion for mounting a steel pipe pile driving device of an embedding machine to be measured is formed at the upper end portion, and a strain gauge is attached to a trunk portion between the lower end portion and the upper end portion, and the trunk portion of the measuring member An actual rotation torque of an embedded machine, comprising: an arithmetic unit connected to a strain gauge attached to the unit and calculating a rotational torque applied to the measurement member based on an amount of strain output from the strain gauge Measuring device. 5. The measuring device for the actual rotational torque of an embedded machine according to claim 4, further comprising a recording device for recording the display output of the driving device in correspondence with the rotational torque calculated by the arithmetic device. When the storage unit that stores the rotational torque applied to the measurement member calculated in advance by the arithmetic unit corresponding to the display output of the drive device as display output / rotational torque correspondence information and the display output of the drive device are input An output unit that outputs rotational torque information corresponding to the display output input using the display output / rotational torque correspondence information, and the actual rotational torque of the buried machine according to claim 5, measuring device. 5. The recording apparatus according to claim 4, further comprising: a recording device that records the display output of the driving device and the amount of strain output from a strain gauge attached to the measurement member in association with each other. measuring device. When the storage unit that stores the strain amount output from the strain gauge attached to the measurement member corresponding to the display output of the drive device in advance as display output / strain amount correspondence information and the display output of the drive device are input, The measurement of the actual rotational torque of the buried machine according to claim 7, further comprising: an output unit that outputs rotational torque information corresponding to the display output input using the display output / distortion correspondence information. apparatus. 9. The actual rotational torque of the buried machine according to claim 6, further comprising a display unit that displays the rotational torque information output from the output unit as the actual rotational torque output from the driving device. Measuring device.

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