JP2003315027A - Hot dimension/shape measuring apparatus of h-steel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that dimensions and a shape could not be controlled by the conventional proximity type distance sensor since a hot H-steel is greatly bent and warped. <P>SOLUTION: The H-steel 70 is measured by four light wave range finders 40, 41, 42, and 43. For that purpose, a frame 25 is set to be a rectangular frame to improve the installation property of the light wave range finders 40, 41, 42, and 43. As a result, the light wave range finder can set the distance to an inspection target to a fully large value, flexibly copes with a change in distance, and is fully compact. By converting distance information to dimension/ shape information by a signal conversion section, the dimension and shape in the H-shape can be measured and displayed on a display. Since the light wave range finder is used, the hot dimension/shape measuring apparatus of the H-steel can be easily miniaturized. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved technique for measuring the hot dimension and shape of H-section steel installed in a rolling line for producing hot-rolled H-section steel.

[0002]

2. Description of the Related Art Many H-section steels are manufactured by a hot roll rolling method in which a billet having a sufficiently high temperature is subjected to a section rolling mill to plastically deform the H-section steel. Since the billet has a high temperature, the longitudinal elastic modulus is small and it is easy to generate H
This is because it can be transformed into a cross section. Hot rolling H
Since the shaped steel is rolled into a long beam, it is cut into a predetermined length by a saw cutting machine provided on the exit side of the rolling mill.

Immediately after rolling, it is examined whether or not the H-section steel obtained by plastic deformation has a predetermined size or shape.
Feedback of the result to the rolling mill is an essential measure for mass production of H-section steel.

Conventionally, an operator having measuring tools such as a caliper, a micrometer, a depth gauge, etc. stands by at the exit of a saw cutting machine, and the measuring tools are applied to the cut surface of the H-shaped steel after sawing to measure the size and size. The shape was measured. However, H-section steel is still hot, and there is a problem in terms of working environment. In addition, since it is a manual measurement, individual differences are likely to occur, and the reliability of measured values is reduced. Furthermore, since it is a manual measurement, the measurement time becomes longer,
This is a factor that reduces productivity.

Therefore, it is necessary to automate the dimension / shape measurement of the hot rolled H-section steel. In order to meet this demand, for example, Japanese Patent Application Laid-Open No. 7-120226 “Shaped steel dimension measuring device” and Japanese Laid-Open Patent Publication No. 7-27518 “On-line shape measuring device for shaped steel” have been proposed.

[0006]

In the above description, the paragraph No. [0009], lines 6 to 18 of the publication, "The laser displacement meter 46 (same for 47) is a semiconductor laser device 48 as shown in FIG. The laser light oscillated from the converging lens 49
Is focused on the object to be measured through the slit 49a, and the reflected light is reflected by the prism 50, the interference filter 51,
One-dimensional CCD device 54 via lens 52 and mirror 53
The distance is measured by irradiating the object with its displacement. The laser measuring device based on the principle of calculating the distance from the light arrival point on the one-dimensional CCD element 54 is used.

However, as is clear from FIG. 6 of the publication, when the change in distance is large, the light arrival point deviates from the one-dimensional CCD element 54, and the measurable distance is limited. If the one-dimensional CCD element 54 is enlarged in order to avoid this,
It is not preferable because the measuring device becomes large. In addition, FIG.
At 0, the detection heads 17 and 18 move about 4
0mm (see paragraph number [0012] second line from the bottom)
Put away. However, since the hot H-section steel is long, the bending and warping may be far more than 40 mm. If there is a large amount of bending or warping, the hot H-section steel is used for the detection heads 17,18
In this case, the detection heads 17 and 18 may be damaged or malfunction.

As described above, the above-mentioned device using the laser measuring device of the type in which the laser light is narrowed by the slit and the reflected light is received by the one-dimensional CCD element cannot flexibly cope with the change of the measuring distance and There are two problems of being extremely short, and from this, it cannot be said that it is unsuitable for measuring the dimensions and shape of hot H-section steel.

Further, as described above, as described in FIG. 6 of the publication, since the slit laser light is adopted,
Even if the one-dimensional CCD element is replaced with the two-dimensional CCD element, the risk of the light arrival point deviating from the CCD element remains the same.

In addition, according to FIG. 5 of the publication, since three laser rangefinders 31, 32U and 32L are attached to one U-shaped frame, the three laser rangefinders 3 are provided.
With 1, 32U and 32L, the outer surface of one flange cannot be measured. Therefore, it is necessary to arrange another U-shaped frame whose orientation is changed, and two U-shaped frames are shown in FIG.

In order to cover the top, bottom, left and right of the H-section steel, only four laser rangefinders 31, 32U, 32L and 31 are required, but in FIG. 5, six laser rangefinders 31, 32U, 3 are used.
Since 2L, 32U, 32L and 31 are arranged, 2
It can be said that the laser rangefinders 32U and 32L are redundant. In addition, it is difficult to make the device compact because two U-shaped frames are required.

As described above, the above-mentioned apparatus using the laser measuring device of the type in which the laser light is narrowed by the slit and the reflected light is received by the two-dimensional CCD element cannot flexibly cope with the change of the measuring distance and Is extremely short, and it is difficult to make the apparatus compact. Therefore, it must be said that it is unsuitable for measuring the dimensions and shape of hot H-section steel.

Therefore, an object of the present invention is to provide a measuring device having a large measuring distance, capable of flexibly responding to a change in the distance, and easily making the device compact.

[0014]

In order to achieve the above object, the first aspect of the present invention includes a frame having an opening having an opening through which an H-section steel to be inspected passes, and a flange and a web of the H-section steel. 4 lightwave rangefinders provided on the upper frame, lower frame, and left and right vertical frames in order to measure the distance of these, and these lightwave rangefinders on the upper frame, lower frame, left and right vertical frames. From the rangefinder moving mechanism provided in the frame for moving along the frame part and the signal converting part for converting the distance information received from the moving lightwave rangefinder into the dimension / shape information Configure a size and shape measuring device.

Although the principle of the lightwave rangefinder will be described later, the distance to the object to be inspected can be set to be sufficiently large, can flexibly respond to changes in the distance, and is sufficiently compact. By converting the distance information into the dimension / shape information by the signal conversion unit, the dimension and shape of the H-section steel can be measured, and the dimension / shape information, for example, can be displayed on the display. Since the optical distance meter is used, it is possible to easily achieve the compactness of the hot dimension / shape measuring device for H-section steel.

According to a second aspect of the present invention, the signal conversion section is provided with a measurement start switch means for artificially determining the start of measurement.

Since the measurement start switch means is additionally provided, the measurement can be started manually. If automatic measurement logic is incorporated in the signal conversion unit, automatic measurement is possible, and both automatic measurement and manual measurement can be arbitrarily performed, which improves usability.

According to a third aspect of the present invention, the V-shaped frame provided with the lightwave distance meter and the distance meter moving mechanism is arranged in the vicinity of the saw cutting machine.

In principle, saw cutting is carried out with the H-section steel stopped. By arranging the V-shaped frame in the vicinity of the saw cutting machine, it is possible to measure the dimensions and shapes simultaneously in parallel during the rest time for cutting, and to stop the line accompanying the dimension and shape measurement work. Can be stopped at zero or at a minimum.

According to a fourth aspect of the present invention, a display for displaying the dimension / shape information is connected to the signal conversion section, and the display is installed on the machine side disposed near the mouth-shaped frame and separated from the mouth-shaped frame. It is characterized by being configured with at least two sets of a display installed at a remote place and a display installed at a remote place.

A specific example of the remote area is an operation room or a process control room on the upstream side of the shape rolling mill, and if a remote installation display is provided in the operation room of the shape rolling mill, information necessary for operating the rolling mill can be displayed. It is possible to feed back without waiting time. Similarly, if a remote control display is provided in the process control room, it can be fed back without waiting time whether or not the rolling line is operating well.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals. FIG. 1 is a layout diagram of a rolling line equipped with an H-shaped steel hot dimension / shape measuring apparatus according to the present invention,
The rolling line 10 includes a heating furnace 11 for heating the material to a rolling temperature and a rough rolling machine 12 for roughly plastically forming the material.
And a finish rolling machine 13 for finishing the rough rolled material into an H-shaped steel,
It comprises a hot dimension / shape measuring device 20 of the present invention and a saw cutting machine 15 for cutting the hot H-section steel into a predetermined length. Although the hot dimension / shape measuring device 20 is installed immediately before the saw cutting machine 15, it may be installed immediately after the saw cutting machine 15.

FIG. 2 is a front view of an H-shaped steel hot dimension / shape measuring device according to the present invention. The H-shaped steel hot dimension / shape measuring device 20 is a rail laid perpendicular to a rolling line. Two
1, a self-propelled carriage 24 equipped with wheels 22 (... indicates a plurality) and a traveling motor 23, and this carriage 24.
Mouth-shaped frame 25 placed on (Mouth-shaped frame 25
Is composed of an upper frame portion 26, a lower frame portion 27, a left vertical frame portion 28, and a right vertical frame portion 29. ), An upper range finder moving mechanism 30 attached to the upper frame 26, a lower range finder moving mechanism 31 attached to the lower frame 27, and a left range finder moving mechanism 32 attached to the left vertical frame 28. The right distance meter moving mechanism 33 attached to the right vertical frame portion 29, and the upper, lower and left portions respectively attached to the slide bases 34 to 37 in these distance meter moving mechanisms 30 to 33.
Right light wave rangefinders 40 to 43, a signal conversion unit 45 shown in FIG. 10, which will be described later, a machine side installed display 46, a remote place installed display 47, and a measurement start switch means 48,
Consists of.

In FIG. 2, the upper range finder moving mechanism 30 is shown.
Is a pair of support blocks 51, 51 on the upper frame portion 26, for example.
And a screw shaft 52 attached along the upper frame portion 26, and a slide base 34 attached to the screw shaft 52 like a nut.
And a guide rod 53 for preventing the slide base 34 from idling, and a servo motor 54 for accurately rotating the screw shaft 52.

The position of the slide base 34 on the upper frame portion 26 can be accurately determined by the number of rotations and the angle of rotation of the screw shaft 52. Therefore, by electrically controlling the servo motor 54, The position of the upper optical distance meter 40 mounted on the slide base 34 can be accurately detected and the position can be controlled. Lower / Right / Left Range Finder Moving Mechanism 3
Since 1, 32, and 33 have the same configuration, the reference numerals are used and the description of each element is omitted.

As can be seen from the figure, the mouth-shaped frame 25 is optimum for the screw shaft 52 to crawl. This is because the four frames 26 to 29 forming the mouth-shaped frame 25 are good supports for the screw shafts 5 ...

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2, in which the upper optical rangefinder 40 is directly attached to the slide base 34 which moves in the front-back direction of the drawing by the screw shaft 52 and the guide rod 53.
Is installed. That is, by rotating the screw shaft 52, the slide base 34 and the upper optical rangefinder 4
0 can be moved toward the front and back of the figure, and the guide rod 5
3 prevents the slide base 34 from rotating at that time.
The same applies to the lower lightwave rangefinder.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 2, in which the left optical distance meter 42 is mounted on the slide base 36 which moves in the front and back direction of the drawing by the screw shaft 52 and the guide rod 53 via a small servo motor 56. Is installed. Due to the action of the servomotor 56, the left optical distance meter 42 is moved to the axis 5
It can rotate around 7. The same applies to the right-side light distance meter.

A radar is known as a rangefinder for long distances. The radar emits a radar wave, the radar wave hits an object and is reflected, the time until the reflected wave arrives is measured, and the velocity of the radar wave is multiplied by 1/2 of the time to obtain the distance. . The velocity of the radar wave is the same as the speed of light. By the way, when the distance is about several meters, the time becomes a very small value, and it is difficult to measure the time accurately, and the apparatus therefor becomes expensive and large-scale.

Therefore, a phase difference detection range finder, which is called a light wave range finder suitable for measuring a distance of several meters, can be considered. The operation principle of this phase difference detection type optical distance meter will be described. However, in order to facilitate understanding, the basic principle will be described with reference to the first principle diagram, and the practical principle will be described with reference to the second principle diagram.

FIGS. 5 (a) and 5 (b) are first principle diagrams of the optical distance meter employed in the present invention. Although there are upper, lower, left, and right optical rangefinders as the optical rangefinder, the upper optical rangefinder 40 will be described here as a representative example. In (a), a light beam 58 having a relatively long wavelength is emitted from the light wave range finder 40 and hits the H-shaped steel 70, and the reflected light beam 59 is received by the light wave range finder 40. At this time, from the lightwave rangefinder 40 to H
If the distance to the shaped steel 70 is L and the wavelength of the light ray 58 is λ0 (where λ0> L), the light ray 58 advances while drawing a sine curve and reaches the H-shaped steel 70 within one cycle. . Then, the reflected light ray 59 returns from the H-shaped steel 70 to the optical distance meter 40 while drawing a sine curve.

The black dots attached to the light ray 58 and the reflected light ray 59 are marks attached every 90 °, and the presence of these points makes it clear that it is a sine curve.
It can be seen that there is a phase difference between 8 and the reflected ray 59.

The phase difference Δλ 0 generated between the start point Sp of the light ray 58 and the one cycle end point Fp of the reflected light ray 59 can be measured by the light wave range finder 40. Since the wavelength λ0 of the emitted ray is known and the phase difference Δλ0 is obtained by measurement, the distance L to be obtained can be calculated by L = λ0−Δλ0. This is the reason why it is called the phase difference detection type.

For example, the frequency f0 of the light ray 58 is set to 50 MHz.
If z and the speed of light c are 3 × 10 ⁸ m / s, then from the general formula (frequency f = speed of light c / wavelength λ), λ0 = c / f0 = 3 × 10
Calculation of ⁸ / (50 × 10 ⁶ ) = 6 m gives a wavelength λ 0 of 6 m, which is applicable to distance measurement of several meters.

Here, the measuring ability (resolution) of the optical distance meter 40
Is assumed to be 1 °. In the above example, if the wavelength λ0 is 6 m, the length per 1 ° is 16.7 mm (16.7 = 600).
0 ÷ 360), which means that the distance measurement accuracy is extremely low.

In (b), a light ray 61 having a relatively short wavelength λ1 is emitted, and the reflected light ray 62 is applied to the H-shaped steel 70 and is received by a light wave range finder, and the start point Sp of the light ray 61 and the end point of one cycle of the reflected light ray 62. It shows how to measure the phase difference Δλ1 generated between Fp and Fp.

As is clear from the figure, the distance L is L = m
-It can be calculated by the formula of λ1-Δλ1. However, m
Is the number of cycles existing between the distances L. This m can be easily obtained from L roughly obtained in (a) and λ1 artificially determined. The frequency f1 of the ray here is 2
Assuming 420 MHz, the wavelength λ1 is 124 mm (124 = 3 × 10 4) according to the formula λ1 = light speed c / frequency f1.
⁸ / (2420 × 10 ⁶ )). The length per 1 ° is 0.34 mm (0.34 = 124 ÷ 360), and the accuracy of distance measurement is extremely high.

Since the number of cycles m cannot be obtained only with (b), (a) is required. That is, in the phase difference detection type optical distance meter, the distance L is measured by a light beam having a relatively long wavelength, which is larger than the measurement target distance, and the distance measurement accuracy is improved by a light beam having a relatively short wavelength. Ask for. However, practically, the following second principle diagram is used.

FIGS. 6 (a) and 6 (b) are second principle diagrams of the optical distance meter employed in the present invention. FIG. 5A is the same graph as FIG. 5B, with frequency f1 of 2420 MHz and wavelength λ1.
Is 124 mm. (B) is a ray 63 and a reflected ray 6
The frequency f2 of 4 is set to 2370 MHz, and the wavelength λ2 is set to 12
It was 6.5 mm.

By the way, two frequencies f that are close to each other
It is known that when 1 and f2 are used, the same action and effect as when using a light beam having a long wavelength (c / (f1-f2)) corresponding to the difference (f1-f2) can be obtained. In the above example, f
Since 1 is 2420 MHz and f2 is 2370 MHz,
The difference (f1-f2) is 50 MHz. Frequency is 50 MH
The ray of z is the same as that shown in FIG.

Therefore, in FIG. 6, for example, by alternately performing (a) and (b) every one second, as shown in FIG.
Similar to (a) and (b), the distance L can be accurately measured.

A device such as a high frequency generator such as a crystal oscillator or a variable frequency generator must be built in the optical distance meter, but it is possible to arrange the devices by realizing FIG. 6 rather than FIG. For this reason, it is possible to reduce the size and cost of the rangefinder. Therefore, it can be said that FIG. 6 is more practical. However, FIG. 5 does not matter.

The operation of the H-shaped steel hot dimension / shape measuring apparatus having the above-described structure will be described below. 7 (a)-(c)
FIG. 6 is an explanatory view of the operation of the upper optical rangefinder according to the present invention.
In (a), the upper lightwave rangefinder 40 is moved as indicated by an arrow to detect the upper left corner 71 of the H-shaped steel 70. (B)
, The upper optical rangefinder 40 is moved as indicated by an arrow to move the upper surface 73 of the left flange 72 and the upper surface 75 of the web 74.
And the distance to the upper surface 77 of the right flange 76 is measured.
This distance information is converted into position information on the xy coordinates.

(C) is a graph of the converted position information, and lines corresponding to the upper surface 73 of the left flange, the upper surface 75 of the web and the upper surface 77 of the right flange can be displayed on the display. The lower lightwave rangefinder is similar to the upper lightwave rangefinder 40 except that it emits a light beam upwards, and therefore a description thereof will be omitted.

Next, the operation of the left optical rangefinder will be described with reference to FIGS.
And explain. FIGS. 8A to 8C are explanatory views (No. 1) of the operation of the left optical distance meter according to the present invention. In (a), the left optical distance meter 42 is tilted with respect to the horizontal as indicated by an arrow a so that the tilt angle is θ (how to determine the angle θ will be described later). Then, the light beam moves as shown by arrow b until it reaches the upper surface inner corner 78 of the right flange 76.

In (b), the distance to the upper inner surface 79 of the right flange 76 is measured by lowering the left optical distance meter 42 as indicated by arrow c. However, the measured value is cos
The correction process is performed by multiplying by θ (the same applies hereinafter).

Subsequently, as shown by an arrow d, the left optical distance meter 42
The distance to the outer surface 81 of the left flange 72 is mainly measured by lowering. Here, the angle θ is set to an angle at which the light ray can see the intersection 82 of the web 74 and the right flange 76 through the left flange 72. This is because the distance to the upper inner surface 79 of the right flange 76 can be measured.

Since the light ray is inclined by the angle θ, it becomes difficult for the reflected light ray to return to the left optical rangefinder 42. However, since the surface of the H-section steel 70 is a rough surface, irregular reflection occurs and a part of it is generated. Since the reflected ray returns to the left optical rangefinder 42,
It is possible to measure the distance.

(C) is a graph in which the distance information measured by the left optical distance meter 42 is converted into xy coordinates and this position information is graphed. The upper inner surface 79 of the right flange and the outer surface 81 of the left flange are shown. A line corresponding to can be displayed.

FIGS. 9 (a) to 9 (c) are explanatory views (part 2) of the operation of the left optical rangefinder according to the present invention. (A) is FIG.
It is an action diagram following (b), and the left optical distance meter 42 is rotated as indicated by arrow e, and the light beam is moved as indicated by arrow f until it reaches the lower surface inner corner 83 of the right flange 76.

In (b), the distance to the lower inner surface 84 of the right flange 76 is measured by raising the left optical distance meter 42 as indicated by the arrow g. Subsequently, the left optical wave range finder 42 is raised as indicated by an arrow h to mainly measure the distance to the outer surface 81 of the left flange 72.

(C) is a graph in which the position information is converted into xy coordinates by converting the distance information (including FIG. 8 (c)) measured by the left optical distance meter 42. By combining this with positional information from the right-side light distance meter and the lower light-wave distance meter, the shape of the H-section steel can be displayed on the display.

The size and shape can be confirmed by the following method. First, for visual confirmation, a template with H-shaped steel contour lines marked on a transparent plate and scale marks was prepared, and this template was displayed on the display.
By superimposing it on the shaped steel image, the shape and size of the image can be read. In addition, automatic confirmation is performed by checking the outline of the H-section steel with x
It is evaluated by converting to y-coordinates and comparing the position information composed of actually measured xy coordinates based on this.

FIG. 10 shows the hot dimensions of H-section steel according to the present invention.
It is a system configuration diagram of shape measurement, and the system is a V-shaped frame 25 having an opening 85 for passing an H-shaped steel 70 as an inspection object, and flanges 72, 7 of the H-shaped steel 70.
6 lightwave distance meters 40, 41, 42, 43 provided on the upper frame portion 26, the lower frame portion 27, and the left and right vertical frame portions 28, 29 of the frame 25 to measure the distance to the web 6 and the web 74, respectively. ,
A signal converter 45 for converting distance information received from the lightwave rangefinders 40 to 43 into dimension / shape information, a measurement start switch means 48 attached to the signal converter 45 for artificially determining the start of measurement, and signal conversion. It comprises a machine-side display 46 that visualizes the size and shape information received from the unit 45, and a remote-place display 47 that is arranged at a remote place apart from the mouth-shaped frame 25. In addition, "machine side" is "kisoku"
And the machine-side display 46 means a display provided near the frame 25.

The dimension / shape measurement work can be automatically started by a program stored in the signal conversion unit 45, and can be performed at any time by operating the measurement start switch means 48. The measurement start switch means 48 can be provided independently as shown in the figure, or can be replaced with the keyboard 86.

The distance meter moving mechanism is a mechanism in which the screw shaft is rotated by a servo motor in the embodiment.
A rack mechanism or a linear motor mechanism may be used, and any type may be used as long as it can move the optical distance meter at a high speed with high stop accuracy.

[0057]

The present invention has the following effects due to the above configuration. According to the first aspect, an optical distance meter is used to measure the dimensions and shape of the H-section steel while hot. The optical distance meter can set a sufficiently large distance to the inspection object, flexibly responds to a change in the distance, and is sufficiently compact.
By converting the distance information into the dimension / shape information by the signal converter, the dimension and shape of the H-section steel can be measured, and can be displayed on a display, for example. Since the optical distance meter is used, it is possible to easily achieve the compactness of the hot dimension / shape measuring device for H-section steel.

According to a second aspect of the present invention, the signal conversion section is provided with a measurement start switch means for artificially determining the start of measurement. By providing the measurement start switch means,
The measurement can be started manually. If automatic measurement logic is incorporated in the signal conversion unit, automatic measurement is possible, and both automatic measurement and manual measurement can be arbitrarily performed, which improves usability.

According to a third aspect of the present invention, the mouth-shaped frame provided with the lightwave distance meter and the distance meter moving mechanism is arranged in the vicinity of the saw cutting machine. Since the mouth-shaped frame is placed near the saw cutting machine, it is possible to perform dimension and shape measurement concurrently in parallel during the rest time for cutting, and line stop accompanying dimension and shape measurement work. Can be stopped at zero or at a minimum.

According to a fourth aspect of the present invention, a display for displaying dimension / shape information is connected to the signal conversion unit, and the display is installed on the machine side disposed near the mouth-shaped frame and is separated from the mouth-shaped frame. It is characterized by being configured with at least two sets of a display installed at a remote place and a display installed at a remote place. A concrete example of a remote location is a rolling mill operation room or process control room on the upstream side.If a remote location display is provided in the rolling mill operation room, information necessary for rolling mill operation can be provided without waiting time. Similarly, if a remote control display is provided in the process control room, whether or not the rolling line is operating well can be fed back without waiting.

[Brief description of drawings]

FIG. 1 is a layout diagram of a rolling line equipped with an H-shaped steel hot dimension / shape measuring apparatus according to the present invention.

FIG. 2 is a front view of an H-shaped steel hot dimension / shape measuring apparatus according to the present invention.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a sectional view taken along line 4-4 of FIG.

FIG. 5 is a first principle diagram of a lightwave distance meter adopted in the present invention.

FIG. 6 is a second principle diagram of the optical distance meter used in the present invention.

FIG. 7 is an explanatory view of the operation of the upper lightwave rangefinder according to the present invention.

FIG. 8 is an explanatory view of the action of the left optical rangefinder according to the present invention (No. 1).

FIG. 9 is an explanatory view of the operation of the left optical rangefinder according to the present invention (Part 2).

FIG. 10 is a system configuration diagram for measuring hot dimensions and shape of H-section steel according to the present invention.

[Explanation of symbols]

20 ... H dimension steel hot dimension / shape measuring device, 25 ... V-shaped frame, 26 ... Upper frame part, 27 ... Lower frame part, 28 ... Left vertical frame part, 29 ... Right vertical frame part, 30-33 ... distance meter moving mechanism,
40 to 43 ... Lightwave range finder, 45 ... Signal converter, 46 ... Machine-side display, 47 ... Remote-place display,
48 ... Measurement start switch means, 70 ... H-shaped steel, 85 ...

Claims (4)

[Claims] 1. A V-shaped frame having an opening for passing an H-section steel as an inspection object, and an upper frame section and a lower frame section of the frame for measuring a distance to a flange or a web of the H-section steel. , Four lightwave rangefinders provided on the left and right vertical frame parts, respectively,
The range information moving mechanism provided in the frame for moving each of these lightwave rangefinders along the upper frame part, the lower frame part, and the left and right vertical frame parts, and distance information received from the moving lightwave rangefinder are displayed. A hot dimension / shape measuring device for H-section steel, which comprises a signal conversion unit for converting into dimension / shape information. 2. The hot dimension / shape measuring apparatus for H-section steel according to claim 1, wherein the signal conversion section is provided with a measurement start switch means for artificially determining the start of measurement. 3. The heat of H-section steel according to claim 1 or 2, characterized in that the V-shaped frame provided with the lightwave rangefinder and rangefinder moving mechanism is arranged in the vicinity of a saw cutting machine. Dimension / shape measuring device. 4. A display for displaying dimension / shape information is connected to the signal conversion unit, and the display includes a machine-side display placed near the mouth-shaped frame and a remote location apart from the mouth-shaped frame. 4. The H according to claim 1, 2 or 3, characterized in that it is configured with at least two remote-placed displays arranged in the same area.
Measuring device for hot dimension and shape of shaped steel.