TW201816357A - Measuring device capable of measuring the thickness of an object under measurement in a non-contact manner - Google Patents

Abstract

According to one embodiment, the measuring device includes a base, a pair of rangefinders, and an auxiliary member. The base includes a lower frame, an upper frame disposed opposite to the lower frame, and a support pillar connecting the lower frame and the upper frame. The pair of rangefinders are disposed in the lower frame and the upper frame, respectively, and are arranged facing each other and are separated by a gap through which the object to be measured passes. The auxiliary member is disposed at the base and is composed of a material having a linear expansion coefficient different from that of the support pillar. The length of the pair of rangefinders in the opposite direction has an expansion amount identical to that of the support pillar that is heated to expand toward the opposite direction of the pair of rangefinders.

Description

   Measuring device   

An embodiment of the present invention relates to a measurement device for measuring a thickness of a measurement object by non-contact measurement.

A measurement device is known that passes a measurement object between a pair of rangefinders that are disposed to face each other in a frame-like frame. Such a measuring device derives the thickness of an object by subtracting the distance from each distance meter to be measured from the distance between a pair of distance meters measured in advance.

The frame used in this measurement device includes an upper frame and a lower frame to which a pair of rangefinders are fixed, and a pillar connecting the upper frame and the lower frame. Pillars are located at one or both ends of the upper and lower frames.

A conventional technique for a thickness measuring device includes Japanese Patent Laid-Open Publication No. 2014-174010.

The problem to be solved by the present invention is to provide a measuring device capable of measuring the thickness of an object with high accuracy even if the length of a pillar is changed by heat.

According to an embodiment of the present invention, a measurement device includes a base, a pair of rangefinders, and an auxiliary member. The base portion includes a lower frame, an upper frame provided opposite to the lower frame, and a pillar connecting the lower frame and the upper frame. A pair of rangefinders are respectively arranged on the lower frame and the upper frame, and are arranged opposite to each other with a gap through which a measurement object can pass. The auxiliary member is provided at the base and is made of a material having a linear expansion coefficient different from that of the pillar. The length of the pair of rangefinders in the opposite direction has the same length as that of the pillar by heat toward the first The expansion amount that expands in the opposite direction to the rangefinder becomes the same expansion amount.

1A, 1B, 1C, 1D, 1E‧‧‧ measuring devices

11, 11A, 11B, 11D‧‧‧Base

12‧‧‧ rangefinder

13, 13A, 13B, 13C‧‧‧ auxiliary components

14‧‧‧ Calibration device

15‧‧‧Control Department

21‧‧‧ lower frame

22, 22B‧‧‧ Pillar

22a‧‧‧ Pillar 1

22b‧‧‧ Pillar 2

23‧‧‧ Upper frame

31, 32‧‧‧Fixed section

99‧‧‧ signal line

100‧‧‧ Measurement object

200‧‧‧ Setting surface

[FIG. 1] An explanatory diagram showing a configuration of a measurement device according to a first embodiment.

[Fig. 2] An explanatory diagram showing a configuration of a measurement device according to a second embodiment.

[Fig. 3] An explanatory diagram showing a configuration of a measurement device according to a third embodiment.

[FIG. 4] An explanatory diagram showing a configuration of a measurement device according to a fourth embodiment.

[FIG. 5] An explanatory diagram showing a configuration of a measurement device according to a fifth embodiment.

[FIG. 6] An explanatory diagram showing a configuration of a measurement device according to a sixth embodiment.

    (First Embodiment)    

Hereinafter, the measurement device 1 according to the first embodiment will be described using FIG. 1.

FIG. 1 is an explanatory diagram showing the configuration of the measurement device 1 according to the first embodiment.

The measuring device 1 includes a frame-shaped base portion 11 through which the measurement object 100 passes, a pair of distance meters 12 provided on the base portion 11 and arranged to face each other, and a distance measuring device 12 provided between the base portion 11 and one of the distance meters 12. The auxiliary member 13, the correction device 14 that measures the distance between the pair of distance meters 12, and the control unit 15 connected to the pair of distance meters 12 and the correction device 14 through signal lines 99 respectively.

Here, the measurement target 100 is, for example, a plate-shaped metal plate that is long in one direction. The measurement target 100 is, for example, a thickness measured by the measurement device 1 after the heat treatment is performed.

The base 11 includes a lower frame 21, one or a pair of pillars 22 provided on one side surface or a pair of side surfaces of the lower frame 21, and an upper frame 23 provided on the pillar 22. The base portion 11 has a square frame shape when viewed from the front, or a C shape. In the present embodiment, the base portion 11 is configured as a square frame having a pair of pillars 22 and will be described below.

The base portion 11 is fixed to the installation surface 200, for example, the lower surface of the lower frame 21 and the lower surface of the pillar 22. The installation surface 200 is, for example, a floor or the like in a workshop where the measurement device 1 is installed.

The lower frame 21 has a square plate shape. The length between a pair of side surfaces of the lower frame 21 provided with the pillars 22 is longer than the length in the width direction of the measurement target 100.

The pillar 22 has a square plate shape or a rod shape. The length of the pair of rangefinders 12 in the opposite direction of the pillar 22 is a length that allows the gap between the pair of rangefinders 12 to allow the measurement object 100 to pass and separates each rangefinder 12 from the measurement object 100. . The pillar 22 is a side surface where the lower frame 21 is fixed to the lower end, and an upper frame 23 is fixed to the side surface of the upper end. That is, the pillar 22 connects the lower frame 21 and the upper frame 23.

The upper frame 23 has a square plate shape. The upper frame 23 is, for example, substantially the same shape as the lower frame 21 and faces the lower frame 21. The upper frame 23 is used to fix the auxiliary member 13 below.

The pair of rangefinders 12 are arranged to face each other. One of the pair of rangefinders 12 is fixed to the upper surface of the lower frame 21, and the other is fixed to the lower surface of the auxiliary member 13. The gap between the pair of distance measuring devices 12 facing each other constitutes a length through which the measurement object 100 can pass. The pair of distance meters 12 are distances that can be individually measured to the passing measurement target 100. The pair of rangefinders 12 sends the measured information to the control unit 15 through a signal line 99.

The auxiliary member 13 has, for example, a square plate shape or a block shape. One side of the auxiliary member 13 on the main surface opposite to the auxiliary member 13 is fixed on the lower surface of the upper frame 23, and the rangefinder 12 is fixed on the other side of the main surface. In other words, the other side of the pair of rangefinders 12 is opposed to one of the pair of rangefinders 12 and is separated by a predetermined distance, and is fixed to the upper frame 23 through the auxiliary member 13 between itself and the upper frame 23. .

The auxiliary member 13 is a material having a linear expansion coefficient different from the linear expansion coefficient of the pillar 22. Specifically, the auxiliary member 13 is made of a material having a linear expansion coefficient higher than that of the pillar 22. The length of the pair of rangefinders 12 of the auxiliary member 13 in the opposite direction is the same as the expansion amount of the pillars 22 that expands in the direction of the pair of rangefinders 12 by heat. length. Here, the direction in which the pair of rangefinders 12 faces is the up-down direction, that is, the height direction.

Hereinafter, the material and length of the pillar 22 and the auxiliary member 13 will be specifically described. As shown in FIG. 1, the length in the vertical direction of the pillar 22 is set to L1, and the length in the vertical direction of the auxiliary member 13 is set to L2. The material of the pillar 22 is the first material of the linear expansion coefficient M1, and the material of the auxiliary member 13 is the second material of the linear expansion coefficient M2 (M1 <M2) which is larger than the linear expansion coefficient M1. At this time, the length L2 of the auxiliary member 13 is L2 = L1 / (M2 / M1).

For example, when the material of the pillar 22 is an iron material and the auxiliary member 13 is an aluminum material, the linear expansion coefficient of the aluminum material is about twice the linear expansion coefficient of the iron material, so the length L2 of the auxiliary member 13 in the vertical direction, It is L2 = L1 / 2. With such a configuration, the amount of expansion due to heat of the pillar 22 and the auxiliary member 13 becomes approximately the same.

The calibration device 14 is capable of measuring the distance between the pair of distance meters 12, in other words, the length of the gap between the pair of distance meters 12. The calibration device 14 sends the measured information to the control unit 15 through a signal line 99.

The control unit 15 calculates the difference between the sum of the distance between the pair of distance meters 12 measured by the calibration device 14 and the distance to the measurement target 100 measured by the pair of distance meters 12 individually. The thickness of the measurement object 100 is derived.

Next, measurement of the measurement target 100 using the measurement device 1 configured as described above will be described.

First, when the measurement object 100 heated by the heat treatment is measured by the measurement device 1, the measurement object 100 is passed between a pair of distance meters 12 by a conveying device such as a conveyor belt. The position at which the measurement target 100 passes is not particularly limited as long as the rangefinder 12 and the measurement target 100 are separated.

When the measurement object 100 passes through the base portion 11, the base portion 11 and the auxiliary member 13 are heated by the heat of the measurement object 100, and the pillars 22 and the auxiliary member 13 expand in the vertical direction. The base portion 11 is fixed to the installation surface 200 because the lower frame 21 and the pillar 22 are fixed to the installation surface 200, so the pillar 22 expands upward. In addition, since the upper frame 23 to which the auxiliary member 13 is fixed is fixed to the pillar 22, the auxiliary member 13 expands downward with respect to the upper frame 23.

In addition, although the pillars 22 and the auxiliary members 13 have different linear expansion coefficients, since the respective lengths are set to L1 and L2 having the same expansion amount, the pillars 22 and the auxiliary member 13 are directed upward and downward by the same expansion amount respectively. Swell. As a result, the range finder 12 fixed to the auxiliary member 13 moves downward by the same amount as the expansion amount of the pillar 22 due to the expansion of the auxiliary member 13, so that the gap between the pair of range finder 12 is kept constant.

The pair of rangefinders 12 respectively measure the distances to the passing measurement target 100 and send the measured information to the control unit 15. The control unit 15 is the difference between the sum of the distances between the pair of rangefinders 12 detected by the calibration device 14 and the distances from the rangefinders 12 to the measurement target 100 received. The thickness of the measurement object 100 is derived. In addition, for example, the calibration device 14 measures the distance between the pair of rangefinders 12 in advance, and sends information to the control unit 15 before the measurement by the measurement object 100. These measurements are performed in a part of or in the entire feeding direction of the measurement target 100, and the thickness of the measurement target 100 is measured.

According to the measurement device 1 of the first embodiment configured as described above, in the direction opposite to the pair of rangefinders 12, the pillars 22 and the auxiliary member 13 have the same expansion amounts due to heat, and the pillars 22 are made the same. The expansion of the pair is offset by the expansion of the auxiliary member 13 to which the rangefinder 12 is fixed, so that the gap between the pair of rangefinders 12 can be made constant. With this, the measurement device 1 is capable of measuring the measurement target 100 with high accuracy by the pair of rangefinders 12.

As described above, according to the measurement device 1 of the first embodiment, even if the length of the pillar 22 is changed by heat, the thickness of the measurement target 100 can be measured with high accuracy.

    (Second Embodiment)    

Next, the measurement device 1A according to the second embodiment will be described with reference to Fig. 2.

Fig. 2 is an explanatory diagram showing a configuration of a measurement device 1A according to a second embodiment. In the measurement device 1A according to the second embodiment, the same reference numerals are given to the same configurations as those of the measurement device 1 according to the first embodiment described above, and detailed descriptions thereof are omitted.

The measurement device 1A includes a frame-shaped base portion 11A through which the measurement target 100 passes, and a pair of rangefinders 12, a calibration device 14, and a control portion 15 provided in the base portion 11A and arranged to face each other.

The base 11A includes a lower frame 21, one or a pair of pillars 22 provided on one side or a pair of sides of the lower frame 21, an auxiliary member 13A provided on the pillar 22, and an upper frame provided on the auxiliary member 13A. twenty three. The base portion 11A has a square frame shape in front view or a C shape. In this embodiment, the base portion 11A has a rectangular frame-like configuration having a pair of pillars 22 and will be described below.

The auxiliary member 13A has, for example, a plate shape. The auxiliary member 13A has its upper end fixed to the upper end of the pillar 22 and its lower end fixed to the upper frame 23. The auxiliary member 13A is, for example, an upper end surface of which is fixed to the upper end surface of the pillar 22 by a fixing portion 31, and a lower end of a main surface facing the upper frame 23 is fixed to a side surface of the upper frame 23. The fixing portion 31 may be, for example, a mechanically fixed member such as a plate material and a bolt, or a mechanically fixed member such as a welding portion.

The auxiliary member 13A is a material having a linear expansion coefficient different from the linear expansion coefficient of the pillar 22, and specifically, is made of a material having a linear expansion coefficient higher than that of the pillar 22. The length of the pair of rangefinders 12 in the opposing direction of the auxiliary member 13A has the same expansion amount as that of the pillar 22 that expands in the direction of the pair of rangefinders 12 by heat. length. Here, the direction in which the pair of rangefinders 12 faces is the up-down direction, that is, the height direction.

Hereinafter, the material and length of the pillar 22 and the auxiliary member 13A will be specifically described. As shown in FIG. 2, the length in the vertical direction of the pillar 22 is set to L1, and the length in the vertical direction of the auxiliary member 13A is set to L2. The material of the pillar 22 is the first material of the linear expansion coefficient M1, and the material of the auxiliary member 13 is the second material of the linear expansion coefficient M2 (M1 <M2) which is larger than the linear expansion coefficient M1. At this time, the length L2 of the auxiliary member 13 is L2 = L1 / (M2 / M1).

For example, when the material of the pillar 22 is an iron material and the auxiliary member 13 is an aluminum material, the linear expansion coefficient of the aluminum material is about twice the linear expansion coefficient of the iron material, so the length L2 of the auxiliary member 13A in the vertical direction. It is L2 = L1 / 2. With such a configuration, the amount of expansion due to heat of the pillar 22 and the auxiliary member 13A becomes approximately the same.

The upper frame 23 has a square plate shape. The upper frame 23 is, for example, a structure in which only the auxiliary member 13A has a smaller thickness than the lower frame 21.

The pair of rangefinders 12 are arranged to face each other. One of the pair of rangefinders 12 is fixed to the upper surface of the lower frame 21 and the other is fixed to the upper frame 23.

The measurement device 1A configured as described above can maintain the gap between the pair of distance meters 12 in a fixed manner similarly to the measurement device 1 described above. Specifically, if the base portion 11A is heated by the heat of the measurement object 100 and the pillar 22 and the auxiliary member 13A are expanded in the vertical direction, the base portion 11A is fixed to the installation surface 200 because the lower frame 21 and the pillar 22 are fixed. The pillar 22 expands upward. Furthermore, since the auxiliary member 13A is fixed to the pillar 22, it expands downward from the fixing portion 31.

In addition, although the pillars 22 and the auxiliary members 13A have different linear expansion coefficients, the lengths of the pillars 22 and the auxiliary members 13A are set to the same expansion amounts L1 and L2, respectively. Therefore, the pillars 22 and the auxiliary members 13A are expanded in the vertical direction by the same expansion amounts. As a result, by the expansion of the auxiliary member 13A, the upper frame 23 fixed to the auxiliary member 13A and the rangefinder 12 fixed to the upper frame 23 are moved downward by only the same amount as the expansion amount of the pillar 22, making a pair The gap of the range finder 12 is certainly maintained.

According to the measurement device 1A of the second embodiment configured as described above, the expansion amounts due to the heat of the pillar 22 and the auxiliary member 13A can be made the same in the direction in which the pair of rangefinders 12 face each other. As a result, the measurement device 1A cancels the expansion in the upward direction of the pillar 22 and the expansion in the lower direction of the auxiliary member 13A under the upper frame 23 to which the rangefinder 12 is fixed. The gap of the distance gauge 12 becomes constant. With these, the measurement device 1A is capable of measuring the measurement target 100 with high accuracy by the pair of rangefinders 12.

    (3rd Embodiment)    

Next, the measurement device 1B according to the third embodiment will be described using FIG. 3.

Fig. 3 is an explanatory diagram showing a configuration of a measuring device 1B according to a third embodiment. In addition, in the measurement device 1B of the third embodiment, the same configurations as those of the measurement device 1 of the first embodiment and the measurement device 1A of the second embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

The measurement device 1B includes a frame-shaped base portion 11B through which the measurement target 100 passes, and a pair of rangefinders 12, a calibration device 14, and a control portion 15 provided in the base portion 11B and arranged to face each other.

The base portion 11B includes a lower frame 21, one or a pair of pillars 22B provided on one side or a pair of side surfaces of the lower frame 21, and an upper frame 23 provided on the auxiliary member 13B. The base portion 11B has a square frame shape when viewed from the front, or a C shape. In the present embodiment, the base portion 11B has a rectangular frame-like configuration having a pair of pillars 22B and is described below.

The pillar 22B includes a first pillar 22a fixed to the lower frame 21, an auxiliary member 13B fixed to the first pillar 22a, and a second pillar 22b fixed to the auxiliary member 13B. The length of the pair of rangefinders 12 in the opposite direction of the pillar 22B is a length that allows the measurement target 100 to pass through the pair of rangefinders 12, and the distance measurement devices 12 and the measurement target 100 are separable.

The first pillar 22a has a square plate shape or a rod shape. The first pillar 22 a is a side surface where the side surface of the lower frame 21 is fixed to the lower end, and the auxiliary member 13B is fixed to the upper end. The first pillar 22 a is fixed to the installation surface 200, for example. The second pillar 22b has a square plate shape or a rod shape. The second pillar 22b is a side surface on which the side surface of the upper frame 23 is fixed to the upper end, and the auxiliary member 13B is fixed to the lower end.

The auxiliary member 13B has, for example, a plate shape. The upper end of the auxiliary member 13B is fixed to the upper end of the first pillar 22a, and the lower end is fixed to the lower end of the second pillar 22b. The auxiliary member 13B is, for example, an upper end surface fixed to the upper end surface of the first pillar 22 a by the fixing portion 31 and a lower end surface fixed to the lower end surface of the second pillar 22 b by the fixing portion 31.

The auxiliary member 13B is a material having a linear expansion coefficient different from the linear expansion coefficients of the first pillar 22a and the second pillar 22b. Specifically, the auxiliary member 13B has a coefficient of linear expansion larger than that of the first pillar 22a and the second pillar 22b. Made of high linear expansion coefficient materials. In addition, the length of the pair of rangefinders 12 in the opposing direction of the auxiliary member 13B is an expansion that expands in the direction opposite to the pair of rangefinders 12 by heat with the first and second pillars 22a and 22b. The same amount becomes the length of the expansion amount. Here, the direction in which the pair of rangefinders 12 faces is the up-down direction, that is, the height direction.

Hereinafter, the material and length of the first pillar 22a, the second pillar 22b, and the auxiliary member 13B will be specifically described. As shown in FIG. 3, the length of the first pillar 22a in the vertical direction is set to L11, the length of the second pillar 22b in the vertical direction is set to L21, and the length in the vertical direction of the auxiliary member 13B is set to L2. The material of the first pillar 22a and the second pillar 22b is the first material of the linear expansion coefficient M1, and the material of the auxiliary member 13B is the second material of the linear expansion coefficient M2 (M1 <M2) which is larger than the linear expansion coefficient M1. At this time, the length L2 of the auxiliary member 13B is L2 = (L11 + L12) / (M2 / M1).

For example, when the material of the first pillar 22a and the second pillar 22b is an iron material, and the auxiliary member 13B is an aluminum material, the linear expansion coefficient of the aluminum material is about twice the linear expansion coefficient of the iron material, so the auxiliary member 13B The length L2 in the up-down direction is L2 = (L11 + L12) / 2. For example, when L11 and L12 are made the same length, the vertical lengths of the first pillar 22a, the second pillar 22b, and the auxiliary member 13B are substantially equal. With such a configuration, the sum of the amounts of expansion due to heat of the first pillar 22a and the second pillar 22b and the amount of expansion due to heat of the auxiliary member 13B become substantially the same.

The upper frame 23 has a square plate shape. The upper frame 23 is, for example, approximately the same shape as the lower frame 21.

The pair of rangefinders 12 are arranged to face each other. One of the pair of rangefinders 12 is fixed to the upper surface of the lower frame 21, and the other is fixed to the lower surface of the upper frame 23.

The measurement device 1B configured as described above can maintain the gap between the pair of distance measuring devices 12 in a constant manner similarly to the measurement devices 1 and 1A described above. Specifically, when the base 11B is heated by the heat of the measurement object 100 and the pillar 22B expands in the vertical direction, the base 11B is fixed to the installation surface 200 because the lower frame 21 and the first pillar 22a are fixed, so the first pillar 22a swells upward. Since the upper end of the auxiliary member 13B is fixed to the upper end of the first pillar 22a, the auxiliary member 13B expands downward from the upper end of the first pillar 22a. In addition, since the lower end of the second pillar 22b is fixed to the lower end of the auxiliary member 13B, the second pillar 22b expands upward from the lower end of the auxiliary member 13B.

The first pillar 22a, the second pillar 22b, and the auxiliary member 13B have different linear expansion coefficients, but the sum of the lengths of the first pillar 22a and the second pillar 22b and the length of the auxiliary member 13B are set to be the same expansion. The amount of L11, L12, L2. Therefore, the first pillar 22a, the second pillar 22b, and the auxiliary member 13A are each expanded in the vertical direction by the same expansion amount. As a result, due to the expansion of the auxiliary member 13A, the upper frame 23 fixed to the auxiliary member 13A and the rangefinder 12 fixed to the upper frame 23 have only the first pillar 22a and the second pillar 22b that expand upward. The same amount of expansion is moved downward, so that the gap between the pair of rangefinders 12 is kept constant.

According to the measurement device 1B of the third embodiment configured as described above, in the direction in which the pair of rangefinders 12 opposes, the amount of expansion of the first pillar 22a, the second pillar 22b, and the auxiliary member 13B due to heat will be Can become the same. As a result, the measurement device 1B can compensate the expansion of the first pillar 22a and the second pillar 22b in the upward direction and offset the expansion in the downward direction of the auxiliary member 13B, so that the gap between the pair of rangefinders 12 can be made constant. With this, the measurement device 1B is capable of measuring the measurement target 100 with high accuracy by the pair of rangefinders 12.

    (Fourth embodiment)    

Next, the measurement device 1C according to the fourth embodiment will be described using FIG. 4.

FIG. 1 is an explanatory diagram showing the configuration of the measurement device 1 according to the first embodiment. In the measurement device 1C of the fourth embodiment, the same reference numerals are given to the same configurations as those of the measurement device 1 of the first embodiment described above, and detailed descriptions thereof are omitted.

The measuring device 1C includes a frame-shaped base portion 11 through which the measurement target 100 passes, and a pair of distance meters 12 provided on the base portion 11 and arranged to face each other, and between the base portion 11 and one of the distance meters 12. An auxiliary member 13C, a correction device 14 for measuring the distance between the pair of distance meters 12, and a control unit 15 connected to the pair of distance meters 12 and the correction device 14 through signal lines 99, respectively.

The auxiliary member 13C is an upper surface of the lower frame 21.

The pair of rangefinders 12 are arranged to face each other. One of the pair of distance meters 12 is fixed to the auxiliary member 13C, and the other is fixed to the lower surface of the upper frame 23.

The auxiliary member 13C is, for example, a square plate shape or a block shape. One side of the auxiliary member 13C is fixed to the upper surface of the lower frame 21, and the rangefinder 12 is fixed to the other side of the main surface. In other words, one side of the pair of rangefinders 12 is opposed to the other side of the pair of rangefinders 12, and is separated only by a predetermined distance, and is fixed to the lower frame through the auxiliary member 13C between itself and the lower frame 21. twenty one.

The auxiliary member 13C is a material having a linear expansion coefficient different from the linear expansion coefficient of the pillar 22, and is specifically composed of a material having a linear expansion coefficient higher than the linear expansion coefficient of the pillar 22. In addition, the length of the pair of rangefinders 12 in the opposing direction of the auxiliary member 13C has the same expansion amount as that of the pillar 22 that expands in the direction of the pair of rangefinders 12 by heat. length. Here, the direction in which the pair of rangefinders 12 faces is the up-down direction, that is, the height direction.

Hereinafter, the material and length of the pillar 22 and the auxiliary member 13C will be specifically described. As shown in Fig. 4, the length in the vertical direction of the pillar 22 is set to L1, and the length in the vertical direction of the auxiliary member 13C is set to L2. The material of the pillar 22 is the first material of the linear expansion coefficient M1, and the material of the auxiliary member 13C is the second material of the linear expansion coefficient M2 (M1 <M2) which is larger than the linear expansion coefficient M1. At this time, the length L2 of the auxiliary member 13C is L2 = L1 / (M2 / M1).

For example, when the material of the pillar 22 is an iron material and the auxiliary member 13C is a rubber material, the linear expansion coefficient of the rubber material is about 10 times the linear expansion coefficient of the iron material, so the length L2 of the auxiliary member 13C in the vertical direction, It is L2 = L1 / 10. With such a configuration, the amount of expansion due to heat of the pillar 22 and the auxiliary member 13C becomes approximately the same.

According to the measurement device 1C configured as described above, the same effects as those of the measurement device 1 described above can be achieved. In other words, in the opposite directions of the pair of rangefinders 12, by making the expansion amount of heat generated by the pillar 22 and the auxiliary member 13C the same, even if the pillar 22 expands upward, the auxiliary member 13C can still face upward. Expansion by the same amount of expansion.

Therefore, even if the upper frame 23 provided with the rangefinder 12 is moved upward, the pair of rangefinders 12 can be moved upward by the auxiliary member 13C. In this way, the upward expansion of the pillar 22 is offset by the upward expansion of the auxiliary member 13C, so that the gap between the pair of distance meters 12 can be made constant. In addition, by using the rubber member for the auxiliary member 13C, the measuring device 1C can reduce the thickness of the auxiliary member 13C, and as a result, the measuring device 1C can be miniaturized. As a result, the measurement device 1 is capable of measuring the measurement target 100 with high accuracy by the pair of distance meters 12.

    (Fifth Embodiment)    

Next, the measurement device 1D according to the fifth embodiment will be described using FIG. 5.

Fig. 5 is an explanatory diagram showing a configuration of a measuring device 1D according to a fifth embodiment. In the measurement device 1D of the fifth embodiment, the same reference numerals are given to the same configurations as those of the measurement device 1 of the first embodiment described above, and detailed descriptions thereof are omitted.

The measuring device 1D includes a frame-shaped base portion 11D through which the measurement target 100 passes, a pair of rangefinders 12 provided on the base portion 11D and arranged to face each other, and correction for measuring a distance between the pair of rangefinders 12. The device 14 and the control unit 15 connected to a pair of the rangefinder 12 and the calibration device 14 through a signal line 99, respectively. The measurement device 1D has a configuration different from that of the measurement device 1 described above, and does not include the auxiliary member 13.

The base portion 11D includes a lower frame 21, a pair of pillars 22 provided on a pair of side surfaces of the lower frame 21, and an upper frame 23 provided on the pillar 22. The base portion 11D has a square frame shape when viewed from the front. The base portion 11D is a material having at least the lower frame 21 and the upper frame 23 having the same linear expansion coefficient and having the same shape.

The base portion 11D is disposed on the installation surface 200. In the base portion 11D, the lower surface of one pillar 22 is fixed to the installation surface 200, and the lower frame 21 and the other pillar 22 are supported on the installation surface 200. Specifically, the base portion 11D is configured such that the lower frame 21 and the other pillar 22 are not fixed to the installation surface 200, but the installation surface 200 is movably moved toward the surface of the installation surface 200.

For example, the base portion 11D fixes one of the pillars 22 by a fixing portion 32 such as a plate member and a bolt. In addition, for example, the base portion 11D is configured such that the lower frame 21 and the other pillar 22 are movable to the installation surface 200 by a rail, a caster, or the like. The installation surface 200 is, for example, a floor or the like in a workshop where the measurement device 1 is installed.

The pair of rangefinders 12 are arranged to face each other. One of the pair of rangefinders 12 is fixed to the upper surface of the lower frame 21, and the other is fixed to the lower surface of the upper frame 23. The gap between the pair of opposed rangefinders 12 is a length through which the measurement object 100 can pass.

Next, measurement of the measurement target 100 using the measurement device 1 configured as described above will be described.

First, when the measurement object 100 heated by, for example, heat treatment is measured by the measurement device 1, the measurement object 100 is passed between a pair of distance meters 12 by a transport device such as a conveyor belt.

At this time, the base 11D is heated by the heat of the measurement object 100, and the lower frame 21 and the upper frame 23 face the main direction of the lower frame 21 and the upper frame 23 to which the rangefinder 12 is fixed, in other words, toward The direction perpendicular to the direction opposite to the rangefinder 12 is further expanded in the lateral direction.

The base 11D has one of its pillars 22 fixed to the installation surface 200, and the lower frame 21 and the other pillar 22 are movably supported by the installation surface 200. Therefore, the lower frame 21 and the upper frame 23 are as shown in FIG. As shown by the two-point lock line, it expands in the horizontal direction. As a result, the other pillar 22 swells in a direction separated from the one in the horizontal direction, that is, the one pillar 22 is separated, and the lower frame 21 and the upper frame 23 maintain a plate shape.

To explain in detail, if the pair of pillars 22 are fixed to the installation surface 200, the lower frame 21 and the upper frame 23 are expanded by heat. Since the pair of side surfaces are fixed to the pair of pillars 22, only The amount of expansion is deformed in the up-down direction. As a result of this deformation, the distance between the pair of rangefinders 12 becomes larger or smaller.

In this regard, in the base portion 11D of this embodiment, one pillar 22 is fixed to the installation surface 200 through the fixing portion 32, and the other pillar 22 and the lower frame 21 are not fixed to the installation surface 200. This prevents the lower frame 21 and the upper frame 23 from being deformed, and because the lower frame 21 and the upper frame 23 have the same linear expansion coefficient and the same shape and the same expansion amount, a pair of rangefinders 12 are oriented toward Only move the same amount in the horizontal direction. Therefore, deformation of the passing measurement object 100 due to heat is prevented, and the rangefinders 12 are maintained in a state facing each other.

Next, the pair of rangefinders 12 respectively measure the distances to the passing measurement target 100 and send the measured information to the control unit 15. The control unit 15 is the difference between the sum of the distances between the pair of rangefinders 12 detected by the calibration device 14 and the distances from the rangefinders 12 to the measurement target 100 received. The thickness of the measurement object 100 is derived. In addition, for example, the calibration device 14 measures the distance between the pair of rangefinders 12 in advance, and sends information to the control unit 15 before the measurement by the measurement object 100. These measurements are performed across part or all of the feeding direction of the measurement target 100, and the thickness of the measurement target 100 is measured.

According to the measurement device 1D of the fifth embodiment thus configured, only the one support post 22 is fixed to the installation surface 200, and the lower frame 21 and the other support post 22 are movably supported on the installation surface 200. This prevents deformation of the lower frame 21 and the upper frame 23 caused by heat. As a result, it is possible to prevent the gap between the pair of rangefinders 12 from being changed by deformation caused by heat. With this, the measurement device 1D is capable of measuring the measurement target 100 with high accuracy by the pair of rangefinders 12.

    (Sixth embodiment)    

Next, the measurement device 1E according to the sixth embodiment will be described using FIG. 6.

Fig. 6 is an explanatory diagram showing a configuration of a measurement device 1E according to a sixth embodiment. In the measurement device 1E of the sixth embodiment, the same configurations as those of the measurement device 1 of the first embodiment and the measurement device 1D of the fifth embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

The measuring device 1E includes a frame-shaped base portion 11D through which the measurement target 100 passes, and a pair of distance meters 12 provided on the base portion 11D and arranged to face each other, and between the base portion 11D and one of the distance meters 12. An auxiliary member 13, a correction device 14 that measures the distance between the pair of distance meters 12, and a control unit 15 connected to the pair of distance meters 12 and the correction device 14 through signal lines 99 respectively.

The pair of rangefinders 12 are arranged to face each other. One of the pair of distance meters 12 is fixed to the upper surface of the lower frame 21, and the other is fixed to the auxiliary member 13. The gap between the pair of distance measuring devices 12 facing each other is a length through which the measurement object 100 can pass.

Here, the lower frame 21 and the upper frame 23 are made of a material having the same linear expansion coefficient, and the auxiliary member 13 is made of a material having a linear expansion coefficient higher than that of the pillar 22.

In addition, the lower frame 21 and the upper frame 23 have the same shape and have the same expansion length as the expansion amount that expands in the direction opposite to the pair of rangefinders 12 by heat.

According to the measurement device 1E according to the sixth embodiment configured as described above, similarly to the first embodiment described above, the expansion of the pillar 22 can be offset by the expansion of the auxiliary member 13 to which the rangefinder 12 is fixed, and can be offset from the above In the fifth embodiment, deformation of the lower frame 21 and the upper frame 23 caused by heat can be prevented similarly. As a result, according to the measurement device 1E, it is possible to prevent the gap of the pair of distance meters 12 from changing. With this, the measurement device 1E is capable of measuring the measurement target 100 with high accuracy by the pair of rangefinders 12.

The measurement device is not limited to the examples of the above embodiments.

As described in the above example, the measurement device 1A includes a lower frame 21, one or a pair of pillars 22 provided on one side or a pair of sides of the lower frame 21, and an auxiliary member 13A provided on the pillar 22. The structure of the upper frame 23 provided on the auxiliary member 13A is not limited thereto. For example, the measurement device 1A is similar to the above-mentioned measurement devices 1D and 1E in that one of the pair of pillars 22 is fixed to the installation surface 200 by the fixing portion 32, and the other of the pair of pillars 22 is possible for the installation surface 200. A mobile configuration is also possible. With such a configuration, the measurement device 1A can achieve the same effects as the measurement device 1E described above.

Similarly, in the measurement devices 1B and 1C, one of the pillars 22 and 22B is fixed to the installation surface 200 by the fixing portion 32, and the lower frame 21 and the other of the pillars 22 and 22B are movably supported by the installation surface 200. A configuration on the installation surface 200 is also possible.

Furthermore, in the above-mentioned example, although each measurement device 1 to 1E has a configuration having any one of the auxiliary members 13, 13A, 13B, and 13C, it is not limited to this. Each of the measuring devices 1 to 1E can be suitably used in combination. That is, the measurement device may be a measurement device having the auxiliary members 13, 13A, 13B, and 13C in a composite manner.

Moreover, in the above-mentioned example, although each measurement device 1 to 1E is exemplified that the pillar 22 and the auxiliary members 13, 13A, 13B, and 13C are configured using a metal material or a rubber material, the invention is not limited thereto. The materials of the pillar 22 and the auxiliary members 13, 13A, 13B, and 13C can be appropriately set so as to offset the amount of expansion due to heat.

Moreover, in the above-mentioned example, although the material of the 1st pillar 22a and the 2nd pillar 22b of the measurement apparatus 1B was the structure of the 1st material which has the same linear expansion coefficient, it is not limited to this. That is, if the expansion amount of the first pillar 22a and the second pillar 22b can be offset by the expansion amount of the auxiliary member 13B, the first pillar 22a and the second pillar 22b may have different linear expansion coefficients.

For example, the first pillar 22a is the first material of the linear expansion coefficient M1, the material of the second pillar 22b is the third material of the linear expansion coefficient M3, and the material of the auxiliary member 13B is linear expansion larger than the linear expansion coefficients M1 and M3. The second material with a coefficient M2 (M1 <M2, M3 <M2). At this time, if the length L2 of the auxiliary member 13B is L2 = (L11‧M1 + L12‧M3) / M2, the respective expansion amounts of the first pillar 22a and the second pillar 22b can be added to the expansion amount of the auxiliary member 13B. offset.

According to the measuring device of at least one of the embodiments described above, even if the length of the pillar is changed by heat and the expansion amount of the pillar is offset by the expansion amount of the auxiliary member, a pair of oppositely-arranged distance measurement can be performed. The opposite distance of the instrument is kept constant, and the thickness of the object can be measured with high accuracy.

Although some embodiments of the present invention have been described, these embodiments are merely provided as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and essence of the invention, and are included in the scope equivalent to the scope of the patented invention.

Claims (7)

    A measuring device includes a base portion including a lower frame, an upper frame provided opposite to the lower frame, and a pillar connecting the lower frame and the upper frame; and a pair of distance meters each provided at The lower frame and the upper frame are opposed to each other and are separated by a gap through which a measurement object can pass; and an auxiliary member is provided at the base and is made of a material having a linear expansion coefficient different from that of the pillar. The length of the pair of rangefinders in the opposite direction has the same expansion amount as the expansion amount of the pillar that expands in the direction of the pair of rangefinders by heat.         For example, in the measurement device of the scope of application for a patent, the auxiliary member is fixed between the upper frame and the rangefinder provided in the upper frame.         For example, as for the measuring device of the scope of patent application, the auxiliary member has an upper end fixed to the upper end of the pillar and a lower end fixed to the upper frame.         For example, the measurement device according to the scope of patent application, wherein the pillar has a first pillar whose lower end is fixed to the lower frame, and a second pillar whose upper end is fixed to the upper frame, and the auxiliary member is disposed. Between the side surface of the first pillar and the side surface of the second pillar, an upper end is fixed to the upper end of the first pillar, and a lower end is fixed to the lower end of the second pillar.         For example, the measuring device of the scope of patent application, wherein the pillar is made of iron material, the auxiliary member is made of rubber material, and is fixed to the lower frame and the rangefinder provided in the lower frame. between.         For example, the measuring device of the scope of patent application, wherein the base is provided with a pair of the pillars, and the pillars are opposite sides disposed opposite to the lower frame, and one of the pillars is fixed. As for the installation surface on which the base is provided, the other side of the pillar is movably supported on the installation surface with respect to the installation surface.         A measuring device includes a base portion including a lower frame, an upper frame disposed opposite to the lower frame, and both ends of which are disposed on opposite sides of the lower frame and opposite sides of the upper frame, respectively. One of the pair of pillars is fixed to the installation surface, and the other of the pair of pillars is movably supported on the installation surface with respect to the installation surface; and a pair of rangefinders are each separately It is arranged on the lower frame and the upper frame, and is arranged to face each other with a gap through which a measurement object can pass.