JPH0481123B2 - - Google Patents

Description

[Detailed description of the invention]

[Field of Industrial Application] The present invention relates to a method and device for measuring dimensions of U-shaped steel sheet piles, and in particular, to a method and apparatus for measuring the dimensions of U-shaped steel sheet piles having Larsen-type claws. The present invention relates to a method and device for measuring dimensions of U-shaped steel sheet piles suitable for.

[Conventional technology]

There are various cross-sectional shapes of steel sheet piles that are currently being manufactured, and among these, U-shaped steel sheet piles 10 have a ralzen-shaped pawl 14 formed at the tip of a flange 12, as shown in FIGS. 5 and 6. In this case, the U-shaped steel sheet pile 10 has a claw portion 14 as shown in FIG. 7, for example.
Since they are used in conjunction with each other, the size of the opening width G of the claw portion 14, which is shown enlarged in FIG. This is one of the important items for quality control. In addition, the total width W of the steel sheet pile 10 shown in FIG. 5 above
If there is a shortage of steel sheet piles, the planned number of sheet piles will not be able to cover the specified distance during construction, and the number of required steel sheet piles will increase, and the increased number of sheet piles will be required. Since piling work takes a long time and poses a major problem during construction, it is still an important item for quality control. The conventional method for measuring the claw opening width G is to saw a small sample from a part of the steel sheet pile immediately after rolling, cool it with water to room temperature, and then cut the sample with a caliper or the like. At present, a method is adopted in which the aperture width G is measured by applying the aperture to the section 14 and reading the scale. Therefore, in order to guarantee the cross-sectional dimension over the entire length of the steel sheet pile, it is necessary to collect and measure at least two or more small samples at equal pitch intervals. Moreover, in spite of this, the small sample is deformed due to being sawn and water-cooled, and the measured value does not necessarily represent the dimensions of the true steel sheet pile. Furthermore, since small samples must be taken from two or more locations, sawing reduces rolling efficiency.
This has caused problems such as a decrease in yield. In order to solve these problems, the applicant has already filed a patent application No. 58-3833 (Japanese Patent Publication No. 2-30647).
When measuring the opening width of the claw part of a U-shaped steel sheet pile (sheet pile) that has a Larzen-type claw with a substantially constant height at the lateral end, the outer surface of the flange excluding the claw part of the steel sheet pile and the Detecting the distance from the range finder to the outer surface of the flange using a range finder disposed in a vertical direction; Using an optical position meter whose optical axis is set in a direction parallel to the outer surface of the flange and near the flange-side tip of the claw, the amount of deviation of the flange-side tip of the claw from the optical axis is measured. and determining the opening width of a steel sheet pile claw from the detected distance, the amount of deviation, and the distance between the optical axes of the distance meter and the optical position meter. is suggesting.

[Problems to be solved by the invention]

According to this method, the opening width G of the claw portion of a steel sheet pile in a red-hot state can be measured without contact over the entire length.
As it is, it was not possible to measure the full width W of the steel sheet pile. On the other hand, as a method of measuring only the full width W of the U-shaped steel sheet pile 10, as shown in FIG. A pair of optical position meters (e.g. image sensor cameras) 20 ₁ , 20 ₂
A method of detecting _{the amount of deviation Δm 1 ,} Δm ₂ of the outer end of each claw from the optical axis a 1 , a ₂ using Using a pair of distance meters 22 ₁ and 22 ₂ arranged at positions that look at the outer ends of the claws on the horizontal sides of the line through which the steel sheet pile 10 passes, measure the outside of each claw from both distance meters 22 ₁ and 22 _2. A method has been proposed in which the distances n ₁ and n ₂ to the ends are detected and the total width W of the steel sheet pile 10 is determined from the relationship expressed by the following equation (2). W = M ₀ + Δm ₁ + Δm ₂ ... (1) W = N ₀ - (n ₁ + n ₂ ) ... (2) Here, M ₀ is the arrangement interval between the optical position meters 20 ₁ and 20 ₂ ; N ₀ is the distance between the distance meters 22 ₁ and 22 ₂ . However, these methods alone have a problem in that the claw opening width G cannot be measured.

[Purpose of the invention]

The present invention was made in order to solve the above-mentioned conventional problems, and the present invention is a U-shaped device that can simultaneously measure the opening width and the total width of the claw portion of a steel sheet pile in a red-hot state or at room temperature without contact over the entire length. The purpose of the present invention is to provide a method and device for measuring dimensions of steel sheet piles.

[Means to solve the problem]

As shown in FIG. 1, the present invention provides claw opening widths G ₁ , G of a U-shaped steel sheet pile 10 having Larzen-type claws 14 ₁ , 14 ₂ with substantially constant claw heights at both lateral ends. ₂
And when measuring the full width W, the steel sheet pile 10
Both sides outside the flange excluding the claws 12A ₁ , 12A ₂
and a pair of distance meters 30 ₁ , each arranged in a perpendicular direction.
30 ₂ , the distance k 1 , k ₂ from both distance meters 30 ₁ , 30 ₂ to each flange outer _surface 12A ₁ , 12A ₂
are located above the claws 14 ₁ and 14 ₂ at a predetermined height position looking into the claw openings, and each optical axis is aligned with the outer surface of the flange 12A ₁ ,
Using a pair of optical position meters 32 ₁ and 32 ₂ set in a direction parallel to 12A ₂ and near the flange side tips of the claws, the claw flange side tips 14A ₁ and 14A ₂ are measured. Both optical position meters 32 ₁ , 32 ₂
The deviation amounts Δk ₁ , Δk ₂ from the optical axes a ₁ , _{a 2} and the optical position meters 32 ₁ , 3 of the claw outer ends 14B ₁ , 14B ₂
The deviation amounts Δl ₁ , Δl ₂ from the optical axes a ₁ , a ₂ of 2 ₂ are detected, respectively, and the detected distances k ₁ , k ₂ and the optical axes a ₁ , a of the claw flange side tips 14A ₁ , 14A ₂ are detected. Deviation amount Δk ₁ from ₂ ,
Δk ₂ and the distance K 01 , K ₀₂ between the distance meters 30 ₁ , 30 ₂ and the optical axes _{a 1 ,} a ₂ of the optical position meters 32 ₁ , _{32 2}
Therefore, for example, the following equation (3) can be used to calculate the opening widths of the claws G ₁ and G ₂
The amount of deviation Δl 1 , Δl 2 of the outer _claw outer ends 14B ₁ , 14B ₂ from _the optical axes a ₁ , a ₂ , the optical position meter 3
2 ₁ , 32 ₂ , the arrangement interval W ₀ and the arrangement height H ₁ , H ₂ , the inclination angle α of the flange outer surfaces 12A ₁ , 12A ₂ and the height C ₁ of the claw outer ends 14B ₁ , 14B ₂ , The above objective is achieved by calculating the total width W from C ₂ using, for example, the following equation (4). Gi=ki−K ₀ i±△ki …(3) (i=1, 2) W=W ₀ + (Δl ₁ +Δl ₂ )/cosα + (H ₂ −C ₂ ) tanα + (H ₁ −C ₁ ) tanα……(4)

[Effect]

When carrying out the present invention, as shown in FIG.
30 ₁ , 30 ₂ are the claw parts 14 ₁ , 14 ₂ of the steel sheet pile 10
A pair of optical position meters (for example, image sensor cameras) 32 ₁ , 32 ₂ are arranged perpendicularly to the outer surfaces of the flanges 12 A ₁ , 12 A ₂ , except for
are respectively disposed above the claws 14 ₁ and 14 ₂ at predetermined heights H ₁ and H 2 looking into the claw openings, respectively, and the respective optical axes a ₁ and _{a 2 are} aligned with the outer surface of the flange. 12
It is set in a direction parallel to each of A ₁ and 12A ₂ and near the flange side tip of the claw portion. Then, the opening widths G ₁ and G ₂ of the claw portions 14 ₁ and 14 ₂ of the steel sheet pile 10 are determined as follows, as shown in FIG. 2. That is, the distance meter 30i is disposed perpendicular to the flange surface 12Ai {i=1 (corresponding to the left side of the figure), i=2 (corresponding to the right side of the figure)}, and the rangefinder 30i and the flange surface 12Ai are Measure the distance ki. On the other hand, using an optical position meter 32i disposed above the steel sheet pile 10 in parallel to the flange surface 12Ai, the self-emission of the claw portion 14i in a red-hot state (hot state) is detected, for example, and the tip of the claw is detected. The amount of deviation Δki of the portion 14Ai from the optical axis ai is determined. Now, since the distance K ₀ i between the optical axes ai of the distance meter 30i and the optical position meter 32i is known, the opening width Gi of the claw portion is calculated using the above equation (3). In addition, the installation height Li of the optical position meter 32i is
The position is sufficiently far from the claw portion 14i (for example, 1000 mm or more). In general, even if the size of U-shaped steel sheet piles changes, the height mi of the claw portion only varies by about 10 mm at most (for example, 28 mm to 38 mm).
Therefore, the installation height Li is determined according to the intermediate value between the minimum size steel sheet pile and the maximum size steel sheet pile, and the optical axis ai of the optical position meter 32i is set near the flange side tip 14Ai of the claw portion 14i. By doing so, Δki
Measured value (Δki=Li・tanθi; θi is the angle between the line connecting the position meter 32i and the claw tip 14Ai and the optical axis ai)
There is no large error. For example, the position meter 32i is installed above H = 1000 mm based on the above intermediate value, that is, from the tip of the claw part, Lmax = 1000 mm + 5 mm for the steel sheet pile of the minimum size, and Lmax = 1000 mm + 5 mm for the steel sheet pile of the maximum size.
If Lmin=1000mm-5mm and the true value of the deviation amount Δki from the optical axis ai of the position meter 32i is 10mm, the theoretical measurement value according to the present invention is 10mm×(1000mm).
mm±5mm)/1000=10mm±0.05mm, which is not a problem. In actual rolling equipment, the position meter is installed approximately 2000 mm or more above, so the error is even smaller. Further, the distance meter 30i is located slightly above the upper surface of the claw portion 14i, specifically from the upper surface of the roller table.
Steel sheet pile flange outer surface 12 approximately 50mm to 70mm above
Aim at Ai and set it up. In this way, the rangefinder 30i
By installing this, it is possible to accurately measure the claw opening width Gi even if there is some lateral shaking of the steel sheet pile during transportation. On the other hand, the total width W of the steel sheet pile 10 is determined as follows, as shown in FIG. That is, the optical position meter 32 of the claw outer end 14Bi
The amount of deviation Δli of i from the optical axis ai is also detected by the optical position meter 32i. Here, the flange outer surface 12Ai is inclined by an inclination angle α from the vertical direction, and therefore, in order to obtain the full width W of the steel sheet pile 10, it is necessary to correct the angle. Specifically, this angle correction is performed as follows. That is, first, as is clear from FIG. 3, the total width W of the steel sheet pile 10 is expressed by the following equation using the arrangement interval W ₀ between the optical position meters 32 ₁ and 32 ₂ . W=W ₀ +(B ₁ +B ₂ )+(A ₁ +A ₂ )...(5) Here, Ai (i=1, 2) is the optical position meter 3
The distance is from the intersection P of the optical axis ai of 2i and the measurement line of the distance meter 30i to the point Q of the outer edge of the nail 14Bi, where the width of the nail 14i is captured by the optical position meter 32i,
It can be calculated using the following formula. Ai = Δli/cosα + (hi − K ₀ i sin α − Ci) tan α ... (6) Here, hi is the installation height of the distance meter 30i with respect to the bottom surface of the nail of the steel sheet pile 10, and Ci is the same point as above. This is the height of Q, and since it is approximately constant for each size of the steel sheet pile 10, it can be determined in advance. On the other hand, Bi is determined by the following formula. Bi={Hi−(hi−K ₀ i sinα)}tanα (7) Here, Hi is the installation height of the optical position meter 32i with respect to the nail bottom surface of the steel sheet pile 10. From equations (6) and (7) above, the following equation can be obtained. Ai+Bi=Δli/cosα+(Hi−Ci)tanα (8) By substituting this equation (8) into the above equation (5), the relationship shown in the above equation (4) is obtained. Now, if H ₁ =H ₂ =H and C ₁ =C ₂ =C are set, the above equation (4) is simplified as shown in the following equation. W= _W0 +( _Δl1 + _Δl2 )/cosα+2(HC)tanα...(9) The above calculation can be performed using an arithmetic device such as a computer.

【Example】

Hereinafter, with reference to the drawings, U
An embodiment of a dimension measuring device for shaped steel sheet piles will be described in detail. In this embodiment, as shown in Fig. 4, a U-shaped steel sheet pile 1
A pair of rangefinders 40 ₁ , 40 ₂ and optical positionometers 42 ₁ , 42 ₂ (arrangement height H) arranged substantially symmetrically with respect to the lateral center line of 0; 40
₁ , 40 ₂ and the outputs of the optical position meters 42 ₁ , 42 ₂ according to the present invention, the claw opening widths G ₁ , G ₂ , and the total width W are calculated using the above equations (3) and (9). It is comprised of a signal processing calculation unit 44 that calculates . As the distance meters 40 ₁ and 40 ₂ , for example, laser distance meters can be used. Moreover, the optical position meters 42 ₁ and 42 ₂ are as follows:
For example, a linear image sensor camera can be used. In this case, the position of the full width of the U-shaped steel sheet pile 10 in the red-hot state can be easily detected. In this embodiment, since the distance meters 40 ₁ and 40 ₂ and the optical position meters 42 ₁ and 42 ₂ are arranged symmetrically with respect to the center line of the steel sheet pile 10, the total width W of the steel sheet pile 10 can be determined relatively easily. It can be calculated using a calculation formula. Note that the distance meters 40 ₁ , 40 ₂ and the optical position meters 42 ₁ , 42 ₂ can also be arranged asymmetrically. In the above embodiments, the present invention was applied to measuring the dimensions of U-shaped steel sheet piles in a red-hot state, but the scope of application of the present invention is not limited to this, and can also be applied to measuring dimensions of U-shaped steel sheet piles after cooling. It is clear that the same applies. In other words, when measuring at room temperature, an auxiliary light source is used to irradiate the U-shaped steel sheet pile from above the claw part so that only the outer edge of the claw can be irradiated. The entire width can then be measured.

【Effect of the invention】

As explained above, according to the present invention, the opening width and the total width of the claw portion of a U-shaped steel sheet pile having Larsen-type claws in a red-hot state or at room temperature can be measured simultaneously over the entire length without contact. It has a good effect.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the cross-sectional shape of a U-shaped steel sheet pile having Larsen-type claws and the arrangement positions of a distance meter and an optical position meter, for explaining the principle of the present invention;
FIG. 2 is a cross-sectional view for explaining the principle of measuring the claw opening width in the present invention, FIG. 3 is a cross-sectional view for explaining the principle of measuring the total width, and FIG.
FIG. 5 is a cross-sectional view, including a partial block diagram, showing the structure of an embodiment of a U-shaped steel sheet pile dimension measuring device to which the present invention is applied, which has Larsen-type claws to which the present invention is applied. 6 is an enlarged sectional view of a portion of FIG. 5, FIG. 7 is a sectional view showing the U-shaped steel sheet pile in use, and FIG. 8 is a sectional view showing the U-shaped steel sheet pile. FIG. 2 is a cross-sectional view showing a conventional measuring method for measuring the full width of a shaped steel sheet pile. 10... U-shaped steel sheet pile, 12A ₁ , 12A ₂ ... Flange surface, 14 ₁ , 14 ₂ ... Claw, 14A ₁ , 14
A ₂ ... Tip, 14B ₁ , 14B ₂ ... Outer end,
G ₁ , G ₂ ... Claw opening width, W ... Overall width, 30 ₁ , 3
0 ₂ , 40 ₁ , 40 ₂ ... distance meter, 32 ₁ , 32 ₂ , 4
1 ₁ , 42 ₂ ... optical position meter, a ₁ , a ₂ ... optical axis,
44... Signal processing calculation unit, Δk ₁ , Δk ₂ ... Claw tip displacement amount, Δl 1 , _{Δl 2 ...} Claw outer edge displacement amount, K ₀₁ ,
K ₀₂ , W ₀ ... Arrangement interval, H ₁ , H ₂ ... Arrangement height,
C ₁ , C ₂ ...Height of the outer edge of the claw.

Claims (1)

[Scope of Claims] 1. When measuring the opening width and full width of the claw portion of a U-shaped steel sheet pile that has Larsen-type claws with a substantially constant height at both lateral ends, the claw portion of the steel sheet pile is Using a pair of rangefinders arranged in a direction perpendicular to both outer surfaces of the flanges, the distances from both rangefinders to the outer surfaces of each flange are detected, and the openings of the claws above the fishing claws are each detected. a pair of optical positioners, each disposed at a predetermined expected height, with each optical axis set in a direction parallel to the outer surface of the flange and near the tip of the flange side of the claw portion; The detection distance, the amount of deviation from the optical axis of the claw flange side tip, and the distance are determined using the following methods: The opening width of the claw is calculated from the spacing between the optical axes of the optical position meter and the optical position meter, and the amount of deviation of the outer edge of the claw from the optical axis, the spacing and height of the optical position meter are calculated. A method for measuring the dimensions of a U-shaped steel sheet pile, the method comprising calculating the total width from the inclination angle of the flange surface and the height of the outer end of the claw. 2. A device for measuring the opening width and total width of the claw portion of a U-shaped steel sheet pile having Larzen-type claws with a substantially constant height at both lateral ends, excluding the claw portion of the steel sheet pile. A pair of distance meters for detecting the distance to the outer surface of each flange, each disposed in a direction perpendicular to both outer surfaces of the flange and at substantially symmetrical positions with respect to the lateral center line of the steel sheet pile; , located above both claws at a predetermined height position looking into the respective claw openings, and at approximately symmetrical positions with respect to the lateral center line of the steel sheet pile, with each optical axis extending outside the flange. A pair of sensors, each of which is set in a direction parallel to the side surface and near the flange side tip of the claw, for detecting the amount of deviation of the claw flange side tip and the claw outer end from the optical axis, respectively. an optical position meter; and calculating the opening width of the pawl portion from the detection distance, the amount of deviation of the tip of the pawl flange side from the optical axis, and the spacing between the optical axes of the distance meter and the optical position meter; A signal processing operation that calculates the total width from the amount of deviation of the outer end of the claw from the optical axis, the arrangement interval and height of the optical position meter, the inclination angle of the flange surface, and the height of the outer end of the claw. A dimension measuring device for U-shaped steel sheet piles, comprising: and.