JP2013190384A - Strain gauge attaching jig and attaching method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig and a method of placing a strain gauge on an object to be measured in a state that the object to be measured is held at a strain gauge attaching position so as to attach the strain gauge to the object to be measured easily and accurately.SOLUTION: A strain gauge attaching jig has an object to be measured holding part 10 to hold an object to be measured 1 at a target position. Also, a strain gauge holding sheet 11 is a transparent sheet having adhesiveness on a rear face, and it accurately holds a strain gauge 3 on the rear face of the strain gauge holding sheet 11 by joining two orthogonal lines 11a on the surface with a center mark 4 on a surface 3a of the strain gauge 3. Furthermore, by joining lines 12a around an opening part 12b for a strain gauge attachment with the lines 11a, the strain gauge can always be held at the same position, and the strain gauge 3 is attached to the object to be measured 1 easily and accurately by pressurizing the strain gauge 3 via the strain gauge holding sheet 11.

Description

  The present invention relates to a jig and a method for mounting a strain gauge used for measuring strain by installing on a measured object at a predetermined position on the measured object.

  As a method for measuring the strain of a measured object such as a machine and its constituent parts, structures, and various test pieces, a wire strain gauge, a foil strain gauge, a semiconductor strain gauge, etc. (hereinafter referred to as a strain gauge) are often used. It has been. This is because the strain gauge can be easily attached to the object to be measured with an adhesive or the like, and the strain measurement can be performed without damaging the object to be measured under the usage environment of the object to be measured.

  However, since the strain of the object to be measured varies depending on the location, the strain measurement result varies depending on the strain gauge mounting position. Therefore, when measuring the strain at a specific position on the object to be measured, it is necessary to accurately attach the strain gauge to the target position.

  Further, strain gauges are often foil-like and have a side length of several millimeters to a few tens of millimeters, and a skillful technique is required to accurately attach the strain gauge to a target position.

  For example, conventionally, as shown in FIG. 1, a marking line 2 is applied in advance to the strain gauge mounting position on the surface 1 a of the object 1 to be measured, and an adhesive or the like is applied to the back surface 3 b of the strain gauge 3. Then, the strain gauge 3 is placed on the surface 1a of the measurement object 1 so that the center mark 4 printed on the surface 3a of the strain gauge 3 and the scribing line 2 on the surface 1a of the measurement object 1 coincide with each other. The strain gauge 3 is attached to the surface 1 a of the DUT 1 by applying pressure through the adhesive sheet 5. In this method, it is necessary to draw the marking line 2 on the object to be measured. Since the strain gauge 3 is attached on the marking line 2, the influence of the marking line 2 affects the strain gauge adhesion or the strain measurement result. there is a possibility. Further, a technique is required to make the mark line 2 on the object to be measured coincide with the center mark 4 on the strain gauge. If the technique is immature, there is a problem that the strain gauge cannot be attached at an accurate position. .

  For the purpose of solving the above problem, as shown in FIG. 2, a transparent adhesive sheet 6 is pasted on the surface 1a of the object to be measured 1 ((a) (b)), and the strain gauge 3 is to be attached. The marking line 2 is applied on the corresponding adhesive sheet 6 ((c)). Next, in a state where a part of the adhesive sheet 6 is attached to the surface 1a of the object 1 to be measured, another part is peeled off from the surface 1a of the object 1 to be measured ((d)), and the strain gauge 3 is removed. The center mark 4 printed on the surface 3a of the strain gauge 3 and the marking line 2 applied on the adhesive sheet 6 are attached so as to coincide with each other ((e)). In this state, an adhesive 7 or the like is dropped on the strain gauge mounting position on the surface 1a of the object 1 to be measured ((e)), and the strain gauge 3 is attached to the surface 1a of the object 1 to be measured together with the adhesive sheet 6. The strain gauge is accurately attached by applying pressure ((f)) through the adhesive sheet 6 (Patent Document 1).

  Further, as shown in FIG. 3, a plurality of scribing lines 2 are applied to the surface 1a of the DUT 1 except the position where the strain gauge 3 is to be attached ((a)). Next, the strain is applied so that the measurement position line 9 printed on the fixed sheet 8 and the center mark 4 printed on the strain gauge 3 coincide with the center of the back surface of the fixed sheet 8 on which the adhesive is applied on the back surface. A gauge 3 is attached ((b)). And after sticking on the surface 1a of the to-be-measured object 1 so that the fixed sheet | seat 8 which affixed the strain gauge 3 may be applied to the surface 1a of the to-be-measured object 1 may coincide, Peel off, apply adhesive 7 or the like to the strain gauge mounting position on the surface 1a of the object 1 to be measured ((c)), and apply the fixing sheet 8 again to the surface 1a of the object 1 to be measured and pressurize ((d)) By doing so, the strain gauge 3 is attached to a predetermined position (Patent Document 2).

Japanese Patent No. 2734174 Japanese Patent No. 3022728

  However, in the methods of Patent Documents 1 and 2, the adhesive sheet 6 and the surface 1a of the object to be measured 1 need to be marked on the surface 1a of the strain gauge, and the adhesive sheet 6 and the fixed sheet 8 once installed. It is necessary to peel off a part of the wire, and when attaching strain gauges to the same position of a large number of objects to be measured having the same shape and dimensions, it is not always the same due to errors in the marking line 2 and the like. In some cases, the strain gauge cannot be attached to the position.

  The present invention solves such a conventional problem and provides a jig and method for simply and accurately mounting a strain gauge on an object to be measured.

  Therefore, in the present invention, as in the existing method, a mark is provided at the strain gauge mounting position on the object to be measured, and the gauge holding sheet is aligned with the mark, and then the gauge holding sheet is aligned and held. Instead of attaching the strain gauge to the object to be measured, install the strain gauge holding sheet so that its back surface protrudes in a state where it is planarly aligned with the holding sheet installation part of the mounting frame. When positioning was performed by engaging with the measured object positioning portion of the attachment frame member, the protruding portion of the back surface was configured to face the strain gauge mounting position of the measured object. Then, in this opposed state, the strain gauge held in a planar alignment on the back surface of the strain gauge holding sheet was attached to the strain gauge attachment position.

  For this reason, when a strain gauge is attached to the same position of a large number of objects to be measured having the same shape and dimensions, a strain gauge holding sheet for holding the strain gauge and a object for positioning the object to be measured at a predetermined position. For mounting a strain gauge comprising: a measured object positioning section; and a mounting frame member having a holding sheet installation section for installing the strain gauge holding sheet at a position opposite to the strain gauge mounting position on the measured object. Use a jig.

  Also, when mounting strain gauges at different positions on the same shape / dimension to be measured, or when attaching strain gauges to workpieces with different shapes / dimensions, the holding sheet installation part A moving mechanism that moves the measured object positioning part relative to each other and adjusts the measured object to a predetermined position for positioning, and displays the strain gauge attachment position of the measured object according to the amount of movement of the moving mechanism. An attachment frame member further having a scale to be used is used.

  Specifically, the strain gauge mounting jig of the present invention is a strain configured to have adhesiveness at least on the back surface, and to hold the strain gauge on the back surface by aligning the strain gauge in a plane based on the position index. The gauge holding sheet, a measured object positioning portion that engages and positions the measured object, and the strain gauge holding sheet that is configured to be planarly aligned based on a position index and can be installed A holding sheet configured so that the back surface of the strain gauge holding sheet placed in a plane and positioned when positioned by the measured object positioning unit projects and is disposed at a position facing the measured object. And an attachment frame member provided with an installation part.

  In the present invention, the holding sheet installation portion is disposed at the facing position when positioned with respect to the measurement object by the measurement object positioning portion and is planar with respect to the strain gauge holding sheet. It is preferable to have an opening in which the aligned strain gauge is disposed.

  The attachment frame member includes a moving mechanism that relatively moves the holding sheet setting portion and the measurement object positioning portion, and the strain gauge attachment position of the measurement object according to the amount of movement of the movement mechanism. It is preferable to further have a scale for display.

  The strain gauge mounting method of the present invention is a method of mounting a strain gauge to an object to be measured, having adhesiveness on at least the back surface, and aligning the strain gauge in a plane based on a position index. A strain gauge holding sheet configured to be held on the back surface, an object positioning unit that engages and positions the object to be measured, and the strain gauge holding sheet that is planarly positioned based on a position index The strain gauge of the object to be measured is configured such that the back surface of the strain gauge holding sheet that is configured to be planarly positioned when positioned by the object positioning unit is overhanging and configured to be installed together. And a mounting frame member provided with a holding sheet installation portion configured to be disposed at a position opposite to the mounting position. And the step of holding the strain holding sheet in a plane alignment on the back surface of the strain gauge holding sheet and the step of installing the strain holding sheet in a plane alignment on the holding sheet installation portion are optional. And then the back side of the strain gauge holding sheet that is positioned in the measuring object positioning portion and planarly aligned with the holding sheet setting portion is the strain gauge. The strain gauge, which is aligned and held on the back surface of the strain gauge holding sheet in a state of facing the attachment position, is attached to the strain gauge attachment position.

  In the present invention, the holding sheet installation portion is disposed at the facing position when positioned with respect to the measurement object by the measurement object positioning portion and is planar with respect to the strain gauge holding sheet. Preferably, the strain gauge has an opening in which the aligned strain gauge is disposed, and the strain gauge held on the back surface of the strain gauge holding sheet is attached to the strain gauge attachment position from within the opening.

  A first step in which the strain gauge is held in a state of being planarly aligned on the back surface of the strain gauge holding sheet; and the strain gauge holding sheet is positioned in a plane with respect to the holding sheet installation portion. A second step in which the strain gauge held in the strain gauge holding sheet is disposed in the opening portion so as to face the strain gauge mounting position, and the mounting frame member A third step in which the strain gauge held on the back surface of the strain gauge holding sheet is attached to the strain gauge attachment position from within the opening while being positioned on the object to be measured by the object positioning portion; It is preferable to comprise. In addition, it is also possible to use the following method instead of this method. That is, a first step in which the strain gauge holding sheet is installed in a state of being planarly aligned with respect to the holding sheet installation portion, and the strain gauge is placed in the opening on the back surface of the strain gauge holding sheet. On the back surface of the strain gauge holding sheet, the second step is held in a state of being aligned in a plane, and the mounting frame member is positioned on the measurement object by the measurement object positioning portion A third step in which the held strain gauge is attached to the strain gauge attachment position from within the opening.

  It is necessary to apply a line indicating the strain gauge mounting position on the surface of the object to be measured by using a strain gauge mounting jig that can position the object to be measured at a predetermined position by engaging with the object positioning part. There is no. In addition, a strain gauge is held on a strain gauge holding sheet having a position index corresponding to the strain gauge mounting position in advance, based on the position index, and held in place, and the strain gauge holding the strain gauge is held. Install the sheet at a predetermined position of the holding sheet installation part on the mounting frame material of the strain gauge installation jig, or hold the strain gauge in a state where it is pre-planarly aligned with the holding sheet installation part The strain gauge is placed in a position opposite to the strain gauge mounting position by aligning and holding the strain gauge with respect to the sheet and engaging the workpiece positioning part with the workpiece. Therefore, it is possible to attach a strain gauge on the surface of the object to be measured. As described above, by using the mounting frame member on which the strain gauge holding sheet is installed, the strain gauge and the object to be measured are positioned with respect to each other, and at the same time, the strain gauge faces the position to be measured. Therefore, the present invention is effective when accuracy is required at the strain gauge mounting position, when strain gauges are attached to a large number of objects to be measured, and when many strain gauges are attached to an object to be measured.

It is a figure which shows the conventional strain gauge attachment method. It is figure (a)-(f) which shows the strain gauge attachment method of patent document 1. FIG. It is a figure (a)-(d) which shows the strain gauge attachment method of patent documents 2. It is a figure (a)-(c) which shows a jig for strain gauge attachment used for the present invention, and a strain gauge attachment method. It is a figure which shows the jig | tool for strain gauge attachment which has a scale used for this invention. It is a figure (a) and (b) which show the section of the jig for strain gauge attachment which has a scale used for the present invention. It is figure (a), (b) which shows the strain gauge attachment method using the jig | tool for strain gauge attachment which has a scale used for this invention.

  The strain gauge mounting jig used in the present invention is, for example, as shown in FIG. 4, a measured object holding portion 10 (corresponding to the measured object positioning portion described above) for holding the measured object 1 (shown by a dotted line). And a line 11a on the strain gauge holding sheet 11 holding the strain gauge 3 (corresponding to a position index for planar alignment when holding the strain gauge). Line 12a (corresponding to a position index for planar alignment when installing the strain gauge holding sheet), and the strain gauge 3 from the strain holding sheet 11 to the object to be measured 1 An attachment frame member composed of a strain gauge holding sheet installation portion 12 having a strain gauge attachment opening 12b for attachment is provided.

  FIG. 4A shows an attachment frame material when a strain gauge is attached to the same position of the DUT 1 having the same dimensions as the plate, and the strain gauge attaching jig is the strain gauge holding sheet 11. And the mounting frame member. The measured object holding portion 10 of the attachment frame member is configured by an L-shaped frame portion that protrudes toward the back side at the upper right corner of the drawing in order to hold the measured object 1 at a target position. . In addition, the strain gauge holding sheet installation section 12 is connected to the strain gauge 3 from the strain gauge holding sheet 11 and the line 12a for matching the line 11a on the strain gauge holding sheet 11 holding the strain gauge 3. An opening 12b for moving to 1 is provided in advance.

  FIG. 4B shows a strain gauge holding sheet 11 holding the strain gauge 3, and the strain gauge holding sheet 11 is a transparent sheet, and two orthogonal crosses indicating the strain gauge holding positions are provided on the surface thereof. The line 11a is printed in advance. The back surface of the strain gauge holding sheet 11 has adhesiveness, and the strain gauge 3 is attached to the strain gauge holding sheet 11 by aligning the center mark 4 on the surface 3 a of the strain gauge 3 with the line 11 a on the strain gauge holding sheet 11. It is possible to hold the back surface accurately (in a state aligned in a plane). Further, an adhesive or the like is applied to the back surface of the strain gauge 3 in order to attach the strain gauge 3 on the object to be measured.

  FIG. 4C shows a strain gauge mounting method using a strain gauge mounting jig. The device under test 1 is always held (positioned) at a fixed position by the device under test holding unit 10. . In addition, by aligning the line 11a on the strain gauge holding sheet 11 holding the strain gauge 3 with the line 12a around the strain gauge mounting opening 12b on the strain gauge holding sheet installation portion 12, the same position (planarly). It is possible to hold the strain gauge holding sheet 11 holding the strain gauge 3 at the aligned position). The strain gauge holding sheet 11 is installed on the surface of the strain gauge holding sheet installation unit 12 in a state where the back surface is held by its adhesiveness. At this time, the peripheral portion of the strain gauge holding sheet 11 is held on the surface of the strain gauge holding sheet installation portion 12, but the central portion projects from the surface of the strain gauge holding sheet installation portion 12 to open the strain gauge mounting opening. It arrange | positions on the part 12b. In the strain gauge mounting opening 12b, the back surface of the strain gauge holding sheet 11 is exposed, and the strain gauge 3 held on the back surface of the strain gauge holding sheet 11 is disposed. Thereafter, by applying pressure to the strain gauge 3 through the strain gauge holding sheet 11, the strain gauge 3 can be easily and accurately attached to the surface of the object to be measured through the strain gauge attaching opening 12b. For example, by pressing the surface of the strain gauge holding sheet 11 on the strain gauge mounting opening 12b from the outside, the strain gauge 3 is pressed against the surface of the object to be measured, and an adhesive previously applied to the back surface of the strain gauge 3 is used. Can be fixed. However, a fixing material such as an adhesive may be installed on the surface of the object to be measured in advance.

  The strain gauge mounting jig (mounting frame member) having a scale used in the present invention includes position adjusting means for determining the strain gauge mounting position of the DUT 1 as shown in FIG. This position adjusting means includes a measured object holding portion 10 having a width direction scale 13 and a length direction scale 14, and a line 12 a for matching with a line 11 a on the strain gauge holding sheet 11 holding the strain gauge 3. And a strain gauge attaching opening 12b for attaching the window 12c for reading the scale 14 in the length direction and the strain gauge 3 from the strain holding sheet 11 to the object 1 to be measured, and the object holding part 10 to be measured. It is comprised from the strain gauge holding sheet | seat installation part 12 which can be slid on.

  Here, the DUT 10 includes a length direction extending portion 10a extending in the illustrated vertical (Y) direction and a width direction extending portion 10b extending in the illustrated left and right (X) direction. The measured object holding part 10 is configured in an L shape by the direction extending part 10a and the width direction extending part 10b. The scale 14 is displayed on the lengthwise extending portion 10a, and the scale 13 is displayed on the widthwise extending portion 10b. The position adjusting means of the present embodiment has a moving mechanism for moving the strain gauge holding sheet setting portion 12 with respect to the measured holding portion 10, and this moving mechanism is set in the case of this embodiment. It is comprised by the slide structure which guides the part 12 with respect to the length direction extension part 10a so that a movement to the up-down direction of illustration is possible. As the moving mechanism, the length direction extending portion 10a and the width direction extending portion 10b are fixed as described above, and only the strain gauge holding sheet setting portion 12 can be moved linearly (Y direction). For example, by adding a slide structure that guides the longitudinally extending portion 10a to be movable in the horizontal direction in the figure with respect to the laterally extending portion 10b, the strain gauge of the DUT 1 is measured. The mounting position may be configured to be movable in a plane (XY direction).

  In the present embodiment, the measurement object 1 is engaged with the inner edge 13b of the width direction extending portion 10b and positioned, and the width direction scale 13 on the measurement object holding unit 10 is used to apply the measurement object 1 to the measurement object 1. The position of the strain gauge attached in the width direction can be adjusted to the width direction scale center 13a. Further, the length of the strain gauge attached to the measurement object 1 by reading the length direction scale 14 on the measurement object holding part 10 through the length direction scale reading window 12 c provided on the strain gauge holding sheet installation part 12. The strain gauge holding sheet installation part 12 can be moved to the vertical position. In the illustrated example, the line 12a around the strain gauge attachment opening 12b provided on the strain gauge holding sheet installation portion 12 is coincident with the width direction scale center 13a on the measured object holding portion 10, and in the length direction. Since the length-direction scale 14 is in contact with the scale reading window 12c, the DUT 1 can be accurately held at the strain gauge mounting position.

  FIG. 6 is a cross-sectional view of the strain gauge mounting jig used in the present invention along the horizontal line 12a. The strain gauge holding sheet installation unit 12 uses the measured object holding unit 10 as a rail. This makes it possible to move. Further, by changing the thickness of the measured object holding portion 10, it is possible to deal with the measured object 1 having different thicknesses. For example, FIG. 6A corresponds to the plate-like object 1 to be measured, and as shown in FIG. 6B, a V-shaped groove is provided on the base 15 to measure the round object 1 to be measured. It is also possible to use it.

  Further, in the present embodiment, the strain gauge holding sheet setting portion 12 is configured to be detachable from the measured object holding portion 10, and the measured object holding portion 10 and the strain gauge holding sheet setting portion 12 are fitted to each other. It is configured to be positioned and held. For this reason, the strain gauge holding sheet installation part 12 is temporarily removed from the measurement object holding part 10 and the strain gauge holding sheet 11 is installed, or the strain gauge holding sheet installation part 12 is then attached to the measurement object holding part 10. Can be attached. Therefore, the measured object holding part 10 may be positioned in advance with respect to the measured object 1, and the strain gauge holding sheet installation part 12 in which the strain gauge holding sheet 11 is installed may be attached thereto. This also applies to the embodiment shown in FIG.

  FIG. 7 shows a strain gauge attaching method using a strain gauge attaching jig having a scale used in the present invention. FIG. 7A shows a state in which the strain gauge 3 is installed on the strain gauge holding sheet 11. The method for holding the strain gauge 3 on the strain gauge holding sheet 11 is the same as in paragraph 0018 above. FIG. 7B shows a method of attaching the strain gauge holding sheet 11 holding the strain gauge 3 to the strain gauge attaching jig, and the method is the same as the paragraph 0019 described above.

  For example, the strain gauge mounting jig having a scale used in the present invention shown in FIG. 5 can also be applied to strain gauge mounting on large objects such as structures. In this case, the object holding unit 10 is fixed to a predetermined position of the structure using the width direction scale 13, and the strain gauge holding sheet setting part 12 is slid by the length direction scale 14 to achieve the purpose on the structure. The strain gauge can be attached to the position of.

  In any of the above embodiments, the strain gauge holding sheet is larger (in plan) than the strain gauge, so that the larger strain gauge holding sheet is placed at a predetermined position (installation section 12) than the small strain gauge. ) Is easy to install, and the mounting error can be reduced. In this case, the strain gauge 3 may be held on the back surface of the strain gauge holding sheet 11 either before or after the strain gauge holding sheet 11 is installed on the strain gauge holding sheet installation portion 12. Moreover, in the said embodiment, although the strain gauge 3 is attached on the to-be-measured object 1 from the inside of the opening part 12b for strain gauge attachment, for example, instead of providing an opening part, a part of strain gauge holding sheet | seat 11 ( For example, the outer edge portion on one side) is configured to be planarly aligned in such a manner that the outer edge portion of the strain gauge holding sheet installation portion 12 is affixed on the outer edge portion of the strain gauge holding sheet setting portion 12. You may comprise so that it may overhang from the outer edge part of the strain gauge holding sheet installation part 12. FIG.

  When a new material is developed, it is necessary to evaluate the strength characteristics of the new material. In this case, a strain gauge is used for strain measurement. In order to evaluate the characteristics of a new material with high reliability, evaluation using a large number of test pieces is important, and the number of strain gauges to be attached is enormous. In addition, strength evaluation of materials is also performed at universities and research institutes, and it is expected that the present invention will be used in the field of material evaluation.

  Many strain gauges are installed in the structure for the purpose of soundness evaluation. For this reason, utilization in the construction field is also expected.

DESCRIPTION OF SYMBOLS 1 Object to be measured 1a Surface of object to be measured 2 Mark line 3 Strain gauge 3a Surface of strain gauge 3b Back surface of strain gauge 4 Center mark printed on the surface of strain gauge 5 Non-adhesive sheet 6 Adhesive sheet 7 Adhesion Agent 8 Fixed sheet 9 Measurement position line 10 Measurement object holding part 10a Length direction extension part of measurement object holding part 10b Width direction extension part of measurement object holding part 11 Strain gauge holding sheet 11a On strain gauge holding sheet 12 Strain gauge holding sheet installation part 12a Strain gauge holding sheet installation part 12b Strain gauge installation opening 12c Length scale reading window 13 Width direction scale 13a Width direction scale center 13b Measured object holding part Inner edge of the extending part in the width direction 14 Scale in the length direction 15 Base

Claims (6)

  A strain gauge holding sheet that has adhesiveness at least on the back surface, and is configured to be able to hold the strain gauge on the back surface by aligning the strain gauge in a plane based on a position index, and engaging with the object to be measured for positioning. A measuring object positioning unit configured to be installed by aligning the strain gauge holding sheet in a plane based on a position index and positioned in a plane when positioned by the measuring object positioning unit. A mounting frame member provided with a holding sheet installation portion configured so that the back surface of the strain gauge holding sheet installed together projects and is arranged at a position facing the object to be measured. Characteristic strain gauge mounting jig.   The holding sheet setting portion is disposed at the facing position when positioned with respect to the measurement object by the measurement object positioning portion, and is planarly aligned with the strain gauge holding sheet. The strain gauge mounting jig according to claim 1, further comprising an opening in which the strain gauge is disposed.   The attachment frame member displays a moving mechanism that relatively moves the holding sheet setting portion and the measurement object positioning portion, and the strain gauge attachment position of the measurement object according to a movement amount of the movement mechanism. The strain gauge mounting jig according to claim 1, further comprising a scale. A method of attaching a strain gauge to an object to be measured,
A strain gauge holding sheet having adhesiveness at least on the back surface and configured to hold the strain gauge on the back surface by aligning the strain gauge in a plane based on a position index; and engaging the object to be measured. An object positioning unit to be positioned, and the strain gauge holding sheet are configured to be installed in a plane based on a position index, and are planarly positioned when positioned by the object positioning unit. A mounting frame member having a holding sheet installation portion configured to be disposed at a position opposite to the strain gauge mounting position of the object to be measured by projecting the back surface of the strain gauge holding sheet installed in alignment. And are used,
A step in which the strain gauge is planarly aligned and held on the back surface of the strain gauge holding sheet; and a step in which the strain holding sheet is planarly aligned and installed on the holding sheet installation portion; Are performed in any order or simultaneously, after which
The strain is measured in a state where the measured object is positioned in the measured object positioning portion and the back surface of the strain gauge holding sheet that is planarly aligned with the holding sheet setting portion faces the strain gauge mounting position. The strain gauge held in a planar alignment on the back surface of the gauge holding sheet is attached to the strain gauge mounting position.
A strain gauge mounting method characterized by the above. The holding sheet setting portion is disposed at the facing position when positioned with respect to the measurement object by the measurement object positioning portion, and is planarly aligned with the strain gauge holding sheet. An opening in which the strain gauge is disposed;
The strain gauge mounting method according to claim 4, wherein the strain gauge held on the back surface of the strain gauge holding sheet is attached to the strain gauge attachment position from within the opening. A first step in which the strain gauge is held in a state of being planarly aligned on the back surface of the strain gauge holding sheet;
The strain gauge holding sheet is installed in a state of being planarly aligned with the holding sheet installation portion, and the strain gauge held by the strain gauge holding sheet is opposed to the strain gauge mounting position. A second step disposed in the opening;
The strain gauge held on the back surface of the strain gauge holding sheet is positioned from the opening to the strain gauge mounting position in a state where the mounting frame member is positioned on the measurement object by the measurement object positioning portion. A third step to be attached;
The method for attaching a strain gauge according to claim 5, comprising:

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