JP2002370194A - Diagonal dimension measuring method and device in standard length cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diagonal dimension measuring device capable of accurately measuring a diagonal dimension of a cutting sheet without causing a dimension measuring error by meandering at sheet traveling time. SOLUTION: This diagonal dimension measuring device is provided with separately arranged two imaging devices 13 and 14 for imaging the edge of a cutting object, a means for determining an edge position of two places of the cutting object just before cutting from an image imaged by the respective imaging devices, a means for measuring the cutting length of the cut cutting object, a means for inputting a width dimension of the cutting object, an arithmetic operation means 21 for arithmetically operating the diagonal dimension of the cut cutting object from a determined inclination of the cutting object at last time cutting time, an inclination of the cutting object at this time cutting time, the measured cutting length, and the inputted width dimension of the cutting object by determining the inclination of the cutting object from a deviation of the edge position of the two places and a preimparted inter-imaging device distance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring diagonal dimensions used in a standard-size cutting apparatus for cutting a continuously sent object, for example, a steel sheet, a building material, a corrugated cardboard or a paper. About.

[0002]

2. Description of the Related Art Conventionally, a cut-to-cut object (hereinafter, referred to as a "cut-to-be-cut object") is used in a standard-size cutting apparatus for cutting continuously sent objects such as steel plates, building materials, corrugated cardboard, and paper.
As a method of inspecting the dimensions of a sheet, a manual sampling inspection has been performed.

[0003] This manual sampling inspection is slightly different depending on a fixed-size cutting device for cutting an object to be cut, that is, a steel plate, a building material, a corrugated cardboard, a paper and the like.

[0004] For example, when cutting a steel sheet, since a sheet is cut into several hundred sheets or more in one lot, sheets are taken out at regular number of sheets from the continuously cut sheet, and as shown in FIG. Diagonal dimension L of cut sheet 11
R, LX, and the length L of the sheet (center point) were measured by a measure, and judgment was made based on the pass / fail of the diagonal dimensions. This manual sampling inspection was very dangerous and had a problem in terms of safety.

[0005]

The conventional diagonal dimension measuring method involves a risk of danger due to manual work, and is a problem in terms of work safety. In order to avoid such manual work, a method of taking an image of a cut sheet with an image pickup device such as a CCD camera and carrying out image processing while transporting the cut sheet by a belt conveyor to measure a diagonal dimension is performed. Have been done. In this method, since the cut sheet is conveyed by a belt conveyor, there is a problem that a measurement error occurs when the position of the sheet is shifted due to vibration or the like.

An object of the present invention is to eliminate the possibility of a dimensional measurement error even if a continuously fed sheet shifts due to meandering. It is an object of the present invention to provide a diagonal dimension measuring method and apparatus using an imaging device, which can measure the diagonal dimension.

Another object of the present invention is to provide a method and apparatus for measuring a diagonal dimension which does not cause a dimension measurement error even when a large bent or corrugated shape is generated at the edge of a continuously fed sheet. To provide.

[0008]

According to a first aspect of the present invention, there is provided:
In a diagonal dimension measuring method for a standard-size cutting device that cuts a sheet-like material to be continuously cut into a standard size, an edge of the material to be cut is provided by two imaging devices spaced apart from each other. And obtaining the two edge positions of the object to be cut immediately before cutting, and calculating the inclination of the object from the deviation of the two edge positions and the distance between the imaging devices given in advance. The step of obtaining, the inclination of the object to be cut at the previous cutting, the inclination of the object to be cut at the time of the current cutting, the width of the object to be cut, and the measured cutting length are used. Calculating a diagonal dimension of the cut object.

According to a second aspect of the present invention, there is provided a diagonal dimension measuring device for a cut-to-size device for continuously cutting a sheet-like cut material to be sent, the edge of the cut object being cut. Means for obtaining two image pickup devices which are spaced apart from each other, means for obtaining two edge positions of the object to be cut immediately before cutting from images picked up by the respective image pickup devices, Means for measuring the cutting length of the object, means for inputting the width dimension of the object to be cut, inclination of the object to be cut from the deviation of the two edge positions, and the distance between the imaging devices given in advance. Is determined from the determined inclination of the object to be cut at the previous cutting and the inclination of the object to be cut at the current cutting, the measured cutting length, and the width dimension of the inputted object to be cut. Calculating means for calculating a diagonal dimension of the cut object to be cut Diagonal dimension measuring device.

[0010] The two imaging devices are arranged as a distance between the imaging devices, a value obtained by subtracting a shortest measurable distance from a predetermined cutting length of the object to be cut.

Preferably, the imaging device is a CCD camera.

Further, the two imaging devices are moved and set to an edge corresponding to a predetermined width of the object to be cut, and one of the two imaging devices is moved to the edge of the object to be cut. A second position, which is fixed at a first position separated by the shortest measurable distance from the cutting completion position and is separated from the cutting completion position of the cutting object by a cutting length of the cutting object along the edge from the cutting completion position of the cutting object. It is preferable to set the movement to the position.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a line configuration of a rotary shear as a fixed-size cutting device for explaining an embodiment of the present invention. The edge of the sheet 10 sent from the sheet feeding device (not shown) is trimmed by the side trimmer 19 and sent to the rotary cutter 15 by the double pinch roll 12. The fed sheet 10 reaches a length measuring roll 16 for detecting the moving amount of the sheet installed on the upstream side of the rotary shear 15 on the line. The length measuring roll 16 presses and contacts two sides of the running sheet 10 with two upper and lower rolls, that is, nips the sheet. The rotation of the length measuring roll 16 caused by the running of the sheet 10 causes a pulse generator (PG) 17
Drive. A pulse is generated from the PG 17 for each unit rotation, and the amount of movement of the continuously traveling seat 10 is measured by counting the pulses as described later.

The rotary shear 15 is provided with a shear angle detector 18 for detecting the rotation angle of the shear, that is, a resolver. Outputs a signal such as a signal.

Further, on the downstream side of the line of the rotary shear 15, a first C that captures an image of the edge of the sheet 10 along a longitudinal edge (hereinafter referred to as an edge) of the sheet 10.
The CD camera 13 and the second CCD camera 14 are CCD
It is attached to the camera position setting mechanism 9.

The CCD camera position setting mechanism 9 comprises an edge position setting section 91 of the sheet 10 and a leading end position setting section 92. The leading end position setting section 92 has a first position for photographing the edge of the sheet 10. And a second CCD camera 14 are mounted.

The edge position setting section 91 is movably held with respect to the leading end position setting section 92, and moves the leading end position setting section 92 along the edge position of the sheet by the motor 93 according to the set width of the sheet 10. Can be set to a different position.

First CCD camera 13 and second CC camera
The D camera 14 is movably held by a tip position setting unit 92, and can move the CCD camera in a line direction by a motor 94 and set the CCD camera at a predetermined position.

The first CCD camera 13 is fixed by the tip position setting unit 92 to a position separated from the cutting completion position of the sheet 10 by the shear 15 (indicated by a dotted line 8) along the edge by the shortest measurable distance. The second CCD camera 14 is fixed by the leading end position setting unit 92 at a position apart from the cutting completion position by the cutting length of the sheet along the edge.

Note that the shortest measurable distance here is the first distance.
Means the distance from the cutting completion position 8 at which the CCD camera 13 can be arranged closest to the shear 15 for measurement (imaging).

The CCD camera position setting mechanism 9 automatically sets the position of the CCD camera described above. in this case,
The sheet width, the shortest measurable distance and the sheet cutting length are given in advance.

The first CCD set as described above
Assuming that the distance between the camera 13 and the second CCD camera 14 in the line advancing direction is L ', L' is equal to (sheet cutting length L-shortest measurable distance).

The reason why the distance between the cameras is set to L 'is as follows. That is, depending on the material of the sheet 10, the side trimmer 19 may
Even if the edge is trimmed, the edge may have a large bend or a waveform. When the sheet 10 having a large bent or corrugated edge is measured by two CCD cameras having a short distance between the cameras, a large error occurs in the measurement of the diagonal dimension as the sheet cutting length increases. Occurs. In order to reduce the measurement error, it is preferable to make the distance between the cameras equal to the sheet cutting length. However, since the first CCD camera 13 cannot be installed immediately below the rotary shaft of the rotary shear, the first CCD camera 13 cannot be installed immediately below the rotary shaft. The camera was installed at a position downstream of the line (ie, from the cutting completion position) by the shortest measurable distance, so that the inter-camera distance L 'was as close to the sheet cutting length L as possible.
L 'is (the sheet cutting length L-the shortest measurable distance) as described above, and both are obtained from known values.

[0024] using a CCD camera 13, 14 as described above, immediately before the cutting sheet 10 traveling, photographing the edge in two places, obtains an edge position Y ₁ and Y _2. Note that the edge positions Y ₁ and Y ₂ are distances from a reference position perpendicular to the line traveling direction to an edge imaged.

The edge position deviation ε, which is the difference between these edge positions, is calculated, and the sheet inclination θ due to the sheet position shift is calculated. The diagonal dimension of the cut sheet is calculated from the measured sheet inclination θ, the measured sheet cutting length L, the distance L ′ between cameras, and the like.

FIG. 2 is a basic configuration diagram of the diagonal dimension measuring device of the present embodiment, and FIG. 3 is a configuration diagram of the arithmetic processing unit 21 of the diagonal dimension measuring device. The diagonal dimension measuring device shown in FIG. 2 includes the CCD camera 13 and the CCD camera 14 as described above.
A pulse generator (PG) 17, an arithmetic processing unit 21, a data setting unit 22, a display and a printer 23 are provided. The distance between the CCD cameras 13 and 14 is L 'as described above.

The arithmetic processor 21 shown in FIG. 3 includes a data converter 31, a pulse converter 32, a signal processor 33 of the first CCD camera 13, a signal processor 34 of the second CCD camera 14, and a data storage unit. 36, an operation unit 37, and a storage unit 38.

The arithmetic processing unit 21 of the diagonal dimension measuring device includes:
As shown in FIG. 2, data required for measurement is set by the data setting device 22. Further, a signal immediately before the start of cutting is input from the shear angle detector 18. The pulse generated by the pulse generator 17 is input to the arithmetic processing unit 21 as a length measurement pulse. Also, CCD
Image signals of each edge captured by the camera 13 and the CCD camera 14 are input to the arithmetic processing unit 21.

Next, the operation of the arithmetic processor 21 will be described in more detail with reference to FIG. The data converter 31 of the arithmetic processor 21 receives the sheet width B and the distance L ′ between the two CCD cameras from the data setting unit 31. The data converter 31 converts these data into an operation unit 37
Is converted to a format suitable for the operation in. In addition, a length measurement pulse for each unit rotation is input to the pulse converter 32 from the pulse generator 17. The pulse converter 32 counts the pulses, converts the pulses into a movement amount, measures a distance L, which is a cutting length, and inputs the distance L to the calculation unit 37.

Hereinafter, the operation of the CCD camera 13 and the CCD camera 14 will be described with reference to the flowchart of FIG. When the sheet 10 is cut, the shear rotates from the top dead center to the bottom dead center. Then, with one rotation of the shear, the shear angle detector 18 detects a signal immediately before the start of cutting from the cutting area (work angle), and as a signal (latch signal) immediately before the start of cutting, the signal processors 33 and 34.
(Step S1). Signal processors 33, 34
The first CCD camera 13 detects the edge of the sheet 10 that is continuously fed by the input signal immediately before the start of cutting.
And the storage of the image captured by the second CCD camera 14 in the data storage unit 36 is started (step S
2).

First, the signal processor 33 selects the first CCD camera 13 (step S3), and the CCD camera 13
The reading is started with the image signal detected by the imaging by the binary data as binary data (steps S4 and S5). After the reading is completed, the second CCD camera 14 is selected (steps S6 and S7). Next, the signal processor 34 is
The reading is started with the image signal detected by the imaging by the camera 14 as binary data, and the reading is completed (steps S8, S9, S10).

Each of the signal processors 32 and 33 reads the
By processing the video signal, the edge position Y ₁ And Y_Two It
And sends it to the arithmetic unit 37 via the data storage unit 36.
You.

The calculating section 37 starts the calculation of the diagonal dimension based on the sheet width B, the sheet cutting length L, and the edge positions Y ₁ and Y ₂ (step S11), and when the calculation is completed (step S12), the calculation is performed. The value is stored in the storage unit 38 (Step S13).

Thereafter, the sheet 10 continuously fed is continuously cut, and immediately before cutting, the same operation as described above is performed to calculate the diagonal dimension of the cut sheet and store it as data in the storage section 38. Are stored sequentially.

The diagonal dimensions of each cut sheet calculated as described below are displayed on the display and the printer 23.

Next, the principle of calculation of the diagonal size by photographing with the CCD camera will be described.

FIG. 5 is a view for explaining the calculation of the sheet inclination θ immediately before the start of cutting and the deviation ΔB of the sheet rear end. The sheet inclination θ is the angle between the edge of the sheet and the line advancing direction, and the deviation ΔB of the sheet rear end is
This means a deviation in a direction perpendicular to the line advancing direction from a sheet edge (indicated by a dotted line in the figure and assumed to be a normal sheet edge) assuming that the sheet is not inclined.

In the arithmetic section 37, the sheet width B and the inter-camera distance L 'input from the data converter 31, and the edge position Y _{1 of the} sheet captured by the first CCD camera 13 input from the data storage section 36. First, a deviation ε of the edge position is obtained from the following equation based on the edge position Y _{2 of the} sheet imaged by the second CCD camera 14.

[0039]

Ε = Y ₁ −Y ₂ The inclination θ of the sheet 11 is obtained from the edge position deviation ε and the distance L ′ between cameras.

[0040]

## EQU2 ## It is determined by θ = tan ⁻¹ (ε / L ′).

The deviation ΔB of the rear end of the sheet is represented by the inclination θ of the sheet.
And the cutting length L of the sheet,

[0042]

## EQU3 ## It is determined by ΔB = Ltan θ.

As described above, the sheet 10 just before cutting is
And the deviation ΔB of the rear end of the sheet are obtained. The inclination θ of the sheet is negative when the trailing edge of the cut sheet falls downward as shown in FIG. 5 with respect to the line advancing direction. θ is assumed to be positive.

Next, a method of calculating the diagonal size of the cut sheet will be described. In the following description, various cases will be considered depending on the form of the actual misalignment of the sheet. In addition,
The shape of the sheet is exaggerated for ease of understanding.

(1) The inclination of the sheet at the previous cutting is negative,
FIG. 6 shows the shape of the sheet immediately after cutting when the sheet inclination at the time of cutting this time is positive. In the figure, the vertices of the four corners of the cut sheet are indicated by E, F, G, and H. Similar to FIG. 5, a normal sheet edge when the sheet is not inclined is indicated by a dotted line. L is a sheet cutting length measured at the center of the line, B is a sheet width, and LX and LR are diagonal dimensions. Further, the sheet leading edge of the line central line drawn perpendicular to the line direction of travel from a point Q (indicated by a dotted line), indicating vertices E, a line traveling direction distance to F in l _1. Also shown vertices E, F is a distance displaced in a direction perpendicular to the line direction of travel from the normal sheet edge B _1. A straight line (indicated by a dotted line) drawn through the point Q and perpendicular to the edge of the cut sheet 11 forms an angle θ ₁ with the leading end of the sheet, and a straight line (indicated by a dotted line) drawn through the point Q and perpendicular to the line advancing direction. ) Is θ ₂ . θ ₁
The inclination sheet during the previous cutting, theta ₂ corresponds to the slope of the time this cutting sheet. In this case, θ ₁ is negative and θ ₂ is positive. Also, let X be the distance between the point where a straight line passing through the point Q and perpendicular to the line traveling direction intersects the sheet edge and the vertices E and F.

X, B ₁ and l ₁ are expressed by the following equations.

[0047]

X = (B / 2) (tan (−θ)₁ ) + Tanθ_Two ) B₁ = X sin θ_Two = (B / 2) (tan (-θ₁ ) +
tanθ_Two ) Sin θ _Two l₁ = Xcosθ_Two = (B / 2) (tan (-θ₁ ) +
tanθ_Two ) Cosθ _Two In the above equation, θ₁ Is negative, θ_Two Is positive, so X is
Positive, B₁ Is positive, l₁ Is positive.

As described above, X, B ₁ and l ₁ are calculated based on the sheet width B and the sheet inclination θ ₁ and θ ₂ .

Using the above X, B ₁ and l ₁ , the diagonal dimensions LX and LR of the sheet can be obtained by the following equation from Pythagorean theorem.

[0050]

(Equation 5)

Therefore, it will be understood that the diagonal dimensions LX and LR can be calculated from the cut sheet width B, the cut sheet length L, the sheet inclination θ ₁ at the previous cutting, and the sheet inclination θ ₂ at the current cutting. .

(2) FIG. 7 shows the shape of the sheet immediately after cutting when the sheet inclination θ ₁ at the previous cutting is negative and the sheet inclination θ ₂ at the current cutting is negative. In the figure, the dimensions and angles corresponding to those in FIG. 6 are indicated by the same symbols.

[0053] In the case of Figure _{7, X, B 1, l} 1 is represented by the following equation.

[0054]

X = (B / 2) (tan (−θ ₁ ) + tan θ ₂ ) At this time, since tan (−θ ₁ ) is positive and tan θ ₂ is negative, when θ ₁ > θ ₂ , X is positive.

[0055]

[Equation 7] B₁ = X sin θ_Two = (B / 2) (tan (-
θ₁ ) + Tanθ_Two ) Sin θ _Two At this time, sin θ_Two Is negative, so B₁ Is negative
You.

[0056]

[Equation 8]₁ = Xcosθ_Two = (B / 2) (tan (-
θ₁ ) + Tanθ_Two ) Cosθ _Two At this time, cos θ_Two Is positive, so l₁ Is positive
You.

Using the above X, B ₁ and l ₁ , the diagonal dimensions LX and LR of the sheet can be obtained by the following equation according to Pythagorean theorem.

[0058]

(Equation 9)

[0059] The above is a case of θ _1> θ _2, θ ₁
<In case of theta _2, the above equation holds.

(3) FIG. 8 shows the shape of the sheet immediately after cutting when the sheet inclination θ ₁ at the previous cutting is positive and the sheet inclination θ ₂ at the current cutting is negative. In the figure, the dimensional method and angle corresponding to FIG. 6 are indicated by the same symbols.

In the case of FIG. 8, X, B ₁ and l ₁ are represented by the following equations.

[0062]

X = (B / 2) (tan (−θ ₁ ) + tan θ ₂ ) At this time, since tan (−θ ₁ ) is negative and tan θ ₂ is also negative, X becomes negative.

[0063]

[Equation 11] B₁ = X sin θ_Two = (B / 2) (tan
(-Θ₁ ) + Tanθ_Two ) Sin θ _Two At this time, sin θ_Two Is negative, so B₁ Is positive
You.

[0064]

[Equation 12]₁ = Xcosθ_Two = (B / 2) (tan
(-Θ₁ ) + Tanθ_Two ) Cosθ _Two At this time, cos θ_Two Is positive, so l₁ Is negative
You.

Using the above X, B ₁ and l ₁ , the diagonal dimensions LX and LR of the sheet can be obtained by the following equations.

[0066]

(Equation 13)

(4) FIG. 9 shows the shape of the sheet immediately after cutting when the sheet inclination θ ₁ at the previous cutting is positive and the sheet inclination θ ₂ at the current cutting is positive.

X, B ₁ and l ₁ are represented by the following equations.

[0069]

X = (B / 2) (tan (−θ ₁ ) + tan θ ₂ ) At this time, tan (−θ ₁ ) is negative and tan θ ₂ is positive, so if θ ₁ > θ ₂ , X Becomes negative.

[0070]

[Equation 15] B₁ = X sin θ_Two = (B / 2) (tan
(-Θ₁ ) + Tanθ_Two ) Sin θ _Two At this time, sin θ_Two Is positive, so B₁ Is negative
You.

[0071]

[Equation 16]₁ = Xcosθ_Two = (B / 2) (tan
(-Θ₁ ) + Tanθ_Two ) Cosθ _Two At this time, cos θ_Two Is positive, so l₁ Is negative
You.

Under the above conditions, the diagonal dimension L of the sheet
X and LR are obtained by the following equations.

[0073]

[Equation 17]

[0074] The above is a case of θ _1> θ _2, θ ₁
<In case of theta _2, the above equation holds.

From the above, it will be understood that no matter what condition the sheet is cut, it can be calculated by one formula without dividing the case.

In the above embodiment, a CCD camera is used as an example of an image pickup apparatus. However, the present invention is not limited to this. Any type of image pickup apparatus capable of reading an edge position from an image is used. It may be.

In the above embodiment, the length measuring roll is
Both sides of the running sheet come into pressure contact with the upper and lower two rolls,
That is, a pulse is generated for each unit rotation from the pulse generator (PG) by the rotation of the length measuring roll 16 generated by nipping the material and following the running of the sheet, and the pulse is counted to thereby calculate the moving amount of the continuously running sheet. Is measured, but a laser length measuring device may be used for measuring the sheet moving distance.

[0078]

According to the present invention, images picked up by two image pickup devices are read by a signal immediately before the start of cutting by the rotary shear, and an edge position is determined from the read image at two points. The inclination of the sheet is obtained from the deviation of the edge position and the distance between the imaging devices, and the sheet inclination at the previous cutting, the sheet inclination at the current cutting, the sheet width dimension given in advance, and the measured sheet length are measured. Thus, the diagonal dimension of the cut sheet can be calculated.

Therefore, even if the sheet meanders,
The diagonal dimension of the cut sheet can be measured.

Further, in the two imaging devices, the value obtained by subtracting the shortest measurable position from the sheet cutting length is arranged as the distance between the imaging devices, so that the edge of the cut sheet has a large bend or waveform. However, the diagonal dimension of the cut sheet can be measured more accurately.

[Brief description of the drawings]

FIG. 1 is a diagram showing a line configuration of a rotary shear according to an embodiment of the present invention.

FIG. 2 is a diagram showing a basic configuration of a diagonal dimension measuring device of the present embodiment.

FIG. 3 is a diagram illustrating a configuration of an arithmetic processing unit.

FIG. 4 is a flowchart for explaining the operation of the arithmetic processing unit.

FIG. 5 is a diagram for explaining sheet inclination detection;

FIG. 6 is a diagram for explaining calculation of a diagonal dimension of a cut sheet.

FIG. 7 is a diagram for explaining calculation of diagonal dimensions of a cut sheet.

FIG. 8 is a diagram for explaining calculation of a diagonal dimension of a cut sheet.

FIG. 9 is a diagram for explaining calculation of a diagonal dimension of a cut sheet.

FIG. 10 is a diagram showing diagonal dimensions of a cut sheet.

[Explanation of symbols]

 Reference Signs List 9 CCD camera position setting mechanism 10 Sheet 11 Cutting sheet 12 Double pinch roll 13 First CCD camera 14 Second CCD camera 15 Rotary shear 16 Measurement roll 17 Pulse generator (PG) 18 Shear angle detector 19 Side trimmer 20 Calculation Processing unit 21 Data setting unit 22 Display and printer 23 Arithmetic processor 31 Data converter 32 Pulse converter 33, 34 Signal processor 36 Data storage unit 37 Operation unit 38 Storage unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideki Oba 2-7-1 Nakajima, Hamamatsu City, Shizuoka Prefecture F-term in Sumikura Industrial Co., Ltd. (Reference) 2F065 AA12 AA22 AA37 BB13 BB15 CC02 CC06 FF04 JJ03 JJ05 JJ26 MM03 PP15 QQ31 3C024 GG00 3C039 CB23 3E075 AA10 BA99 CA01 DA14 DA32 DB02 DB14 GA02

Claims (8)

[Claims] 1. A diagonal dimension measuring method for a standard-size cutting device for cutting a sheet-shaped object to be continuously sent to a standard size, comprising: two imaging devices arranged apart from each other; Imaging the edge of the object to be cut and obtaining two edge positions of the object immediately before cutting; and calculating the position of the edge from the deviation of the two edge positions and a predetermined distance between the imaging devices. A step of obtaining the inclination of the cut object, the inclination of the object to be cut at the time of the previous cutting, the inclination of the object to be cut at the time of the current cutting, and the width dimension of the object to be cut which is given in advance,
Calculating a diagonal dimension of the cut object from the measured cutting length. 2. The imaging device according to claim 1, wherein the two imaging devices are arranged by subtracting the shortest measurable distance from a predetermined cutting length of the object to be cut, as a distance between the imaging devices. 2. The diagonal dimension measuring method according to 1. 3. The diagonal dimension measuring method according to claim 1, wherein the imaging device is a CCD camera. 4. A step of moving and setting the two image pickup devices to an edge corresponding to a predetermined width of an object to be cut, and setting one of the two image pickup devices to be cut. From the cut completion position of the object, it is fixed at a first position separated by the shortest measurable distance along the edge from the cut completion position of the object. Moving and setting to a second position separated by the cutting length.
Diagonal dimension measurement method described in 1. 5. A diagonal dimension measuring device in a standard-size cutting device for cutting a sheet-shaped object to be continuously fed into a standard size, wherein an image of an edge of the object to be cut is imaged, and the image is taken and spaced apart. Means for obtaining two edge positions of the object to be cut immediately before cutting from the images taken by each of the two image pickup devices, and the cutting length of the cut object to be cut Means, means for inputting the width dimension of the object to be cut, inclination of the object to be cut is obtained from the deviation of the two edge positions, and the distance between the imaging devices given in advance, From the inclination of the object to be cut at the time of cutting and the inclination of the object to be cut this time, the measured cutting length, and the width dimension of the inputted object to be cut, the diagonal of the object to be cut is obtained. Calculating means for calculating the dimensions, Apparatus. 6. The image pickup apparatus according to claim 1, wherein the two image pickup apparatuses are arranged such that a value obtained by subtracting a shortest measurable distance from a predetermined cutting length of the object to be cut is used as a distance between the image pickup apparatuses. 6. The diagonal dimension measuring device according to 5. 7. The diagonal dimension measuring device according to claim 5, wherein the imaging device is a CCD camera. 8. A means for moving and setting the two image pickup devices to an edge corresponding to a predetermined width of an object to be cut, and one of the two image pickup devices being cut and From the cut completion position of the object, it is fixed at a first position separated by the shortest measurable distance along the edge from the cut end position, and the other imaging device is moved along the edge from the cut completion position of the cut object. 8. A diagonal dimension measuring apparatus according to claim 5, further comprising: means for moving and setting to a second position separated by a cutting length.