JP2000105103A - Eccentricity inspection device for rolled paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit an eccentricity inspection device for rolled paper which measures the eccentricity of rolls of paper to prevent the occurrence of artificial errors by making measurement mechanically and smoothly inspect the rolls of paper by conducting inspections in a non-contacting state. SOLUTION: A first camera 3 is set up at a position where the camera 3 is roughly faced to the center of the core 2 of a roll of paper 1 and the center Q of the core 2 is found by taking the picture of the side face of the end section of the core 2 with the camera 3. A supporting arm 4 is provided in such a way that the arm 4 can be turned around the optical axis of the photographing optical system of the camera 3 and can be elongated and contracted by means of an actuator 5. The picture of the outer peripheral section of the roll 1 is taken with a second camera 6 attached to the front end section of the arm 4 by turning the arm 4 and the radius of the roll 1 is found by finding the distance to the center Q from the outer periphery of the roll 1 in the taken picture. The eccentricity of the roll 1 is found from the difference between the maximum value and minimum value of the found radius.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the eccentricity of a paper roll by measuring the outer diameter of the paper roll formed by a paper machine and wound by a winder or the like. The present invention relates to a lead inspection device.

[0002]

2. Description of the Related Art Paper made by a fourdrinier paper machine or the like is usually made into a width of 4 m or more in order to improve productivity, etc., and is wound into a roll at the outlet at the paper machine. . Such a paper roll wound into a roll has a width as it is formed in a printing plant due to transportation problems, problems with the width of printing machines and processing machines, and other problems in the manner of use by consumers. May not be available for shipping. In such a case, the paper mill supplies the formed paper roll to a winder or a rewinder, cuts the roll into a desired width with a slitter or the like, adjusts the winding length as necessary, and adjusts the length of the customer. The product is re-wound to a small volume so that it conforms to the specifications of printing machines and other products. When rewinding into a small volume, a paper tube, a so-called core, is used as a core.

[0003] The roll of wound paper (hereinafter referred to as "roll paper roll") is supplied to a printing machine or the like in a printing factory or the like in a loaded state and is subjected to printing. At this time, if the cross-sectional shape of the take-up paper roll is not a perfect circle and is in an eccentric state, it fluctuates when traveling through the printing press, and paper cutting or printing misalignment occurs, so that proper printing cannot be performed. Otherwise, the fluttering paper may be bitten by the printing press. For this reason, the paper mill inspects the amount of eccentricity of each web roll, and ships only those rolls whose eccentricity is within an allowable range.

[0004] Inspection of the eccentricity of the conventional paper roll is manually performed. That is, a cylindrical or conical chucking hardware called a nose is inserted into the core of the web roll, and the scale is read while rotating a scale rotatably supported around the nose, thereby reading the web. The radius from the center is measured over the entire outer circumference of the roll. If the difference between the maximum value and the minimum value is equal to or more than a certain value, the shipment is stopped as a defective product.

[0005]

However, the above-mentioned conventional manual method is troublesome and requires a gap between the nose and the core for rotating the nose. If it causes errors or is small, the nose cannot rotate smoothly,
There is a problem that measurement work is stagnated. Further, since the radius is measured by visually checking the scale, there is a possibility that a human-made measurement error may occur and a defective roll may be overlooked.

Accordingly, the present invention eliminates the occurrence of human measurement errors by mechanically measuring the amount of eccentricity,
It is an object of the present invention to provide a wrapping paper eccentricity inspection device capable of performing a smooth measurement by measuring the wrapping paper roll in a non-contact manner.

[0007]

As a technical means for achieving the above-mentioned object, a roll paper eccentricity inspection apparatus according to the present invention comprises a side surface of an end portion of a paper tube of a roll paper roll used for eccentricity inspection. A first photographing means provided with the optical axis of the photographing optical system in parallel with the longitudinal direction of the paper tube at a position facing the first paper tube, and a first photographing means at a position facing an end side surface of the paper tube of the winding paper roll. A support arm rotatably provided about an axis parallel to the optical axis of the photographing means, and a photographing optical system supported by the support arm and having an optical axis parallel to the optical axis of the first photographing means. And a second photographing means provided with a first photographing means for photographing the end of the paper tube by the first photographing means, and rotating the second photographing means along the outer periphery of the web roll by rotating the support arm. Of the paper tube captured by the first photographing means. Find the center of the paper tube from the image, it is characterized by measuring the eccentricity of the web roll from the image of the outer peripheral portion which is captured by the second imaging means.

With the central axis of the paper tube and the optical axis of the first photographing means parallel, the first photographing means photographs the side surface of the end of the paper tube. If this captured image is superimposed on a first coordinate system whose origin is a predetermined point of the imaging range such as the optical axis of the first imaging means, the position of the end face of the paper tube can be represented on this first coordinate system. The center position of the paper tube in the first coordinate system can be obtained. Since the paper tube is considered to be almost a perfect circle, its center position can be obtained from the coordinates of three points on the outer periphery of the paper tube.

When the support arm is rotated, the second
The photographing means turns around the rotation axis of the support arm. Since the optical axis of the photographing optical system of the second photographing means is parallel to the optical axis of the first photographing means, the photographing direction of the second photographing means is substantially equal to the photographing direction of the first photographing means. When a coordinate system whose origin is the rotation axis of the support arm is used as a reference coordinate system, the distance between the rotation axis of the support arm and the optical axis of the second photographing means can be known or automatically measured. Since it can be easily known by adopting the mechanism, when the second photographing means turns, the coordinates of the arc drawn by the optical axis in the reference coordinate system are known. When the outer peripheral surface of the web roll is photographed by the second photographing means, the distance between each position of the outer peripheral surface on the photographed image and the optical axis of the second photographing means is obtained. It can be obtained as the coordinates of the reference coordinate system. If the coordinates of the outer peripheral surface are converted into a coordinate system having the origin at the center position of the paper tube, the distance between the center of the paper tube and the outer peripheral surface, that is, the radius of the take-up paper roll is obtained. By calculating the difference from the above, the amount of eccentricity can be obtained. Then, the paper roll having the eccentricity within the allowable range is shipped.

According to a second aspect of the present invention, there is provided an eccentricity inspection apparatus for a paper roll, which is located at a position facing an end side surface of a paper core of a paper roll used for eccentricity inspection, in a direction parallel to a longitudinal direction of the paper pipe. A support arm rotatably provided around the axis, and a part of the support arm, which is provided near the center of rotation of the support arm, and the rotation of the support arm causes the optical axis of the imaging optical system to rotate. A first photographing unit that rotates, and a second photographing unit that is supported by the support arm and has a photographing optical system having an optical axis parallel to the optical axis of the first photographing unit.
The end of the paper tube is photographed by photographing means, and the outer peripheral part is photographed while rotating the second photographing means along the outer periphery of the web roll by the rotation of the support arm.
The center of the paper tube is obtained from the image of the paper tube captured by the image capturing means, and the eccentricity of the web roll is measured from the image of the outer peripheral portion captured by the second image capturing means.

When the outside diameter of the paper tube is small, the first photographing means may be fixed at a position where an image on the side surface of the end portion of the paper tube can be captured, but the outside diameter of the paper tube is large. When the entire side of the end cannot be captured, the outer periphery of the paper tube is photographed while rotating the first photographing means, and an image at an appropriate position is captured, and the center of the paper tube is obtained from the position data. For this reason, the first photographing means is supported by a support arm,
The first photographing means is turned by the rotation of the support arm. In this configuration, since the coordinates of the optical axis of the first photographing means in the reference coordinate system whose origin is the center of rotation of the support arm are known, the end of the paper tube captured by the first photographing means The coordinates of the center position of the paper tube in the reference coordinate system can be obtained from the image. On the other hand, each position on the outer peripheral surface of the web roll captured by the second photographing means is represented by coordinates in the reference coordinate system. By converting the coordinates of the outer peripheral surface into a coordinate system having the origin at the center position of the paper tube, the maximum value and the minimum value of the radius can be obtained, and the amount of eccentricity can be obtained.

According to a third aspect of the present invention, there is provided an eccentricity inspection apparatus for a web, wherein the length of the support arm is variable, and the length of the support arm is different from the optical axis of the first photographing means and the optical axis of the second photographing means. The feature is that the distance is variable.

There are various types of outer diameters of the web roll for which the amount of eccentricity is to be measured, depending on the demands of consumers. By making the length of the support arm variable, the amount of eccentricity can be measured corresponding to these rolls having various outer diameters.

According to a fourth aspect of the present invention, there is provided the web eccentricity inspection apparatus, wherein the optical axis of the photographing optical system of the first photographing means coincides with the center of rotation of the support arm. And

If the optical axis of the photographing optical system of the first photographing means coincides with the center of rotation of the support arm, the origin of the reference coordinate system is set to the optical axis of the photographing optical system of the first photographing means and the support arm. And the calculation of the amount of eccentricity is simplified.

According to a fifth aspect of the present invention, there is provided a web eccentricity inspection apparatus, wherein the second photographing means rotates the support arm each time the support arm is positioned at a predetermined angle. It is characterized in that an image of the outer peripheral portion of the web roll is captured.

When the eccentricity of the paper roll is obtained, the maximum radius and the minimum radius of the paper roll are obtained. Therefore, the image is captured at a predetermined angle without capturing the entire outer periphery of the paper roll. The approximate outer diameter of the paper roll may be obtained. Inspection accuracy can be improved by reducing the rotation angle and increasing the number of image capturing points. Further, the capture of the image may be performed when the second photographing unit passes a predetermined position while rotating the support roll.

According to a sixth aspect of the present invention, in the web eccentricity inspection apparatus, the first photographing means and the second photographing means may include a C
It is characterized by comprising a CD camera.

By configuring each of the photographing means with a CCD camera, it is possible to reduce the size and weight of the eccentricity inspection apparatus for rolled paper.

Further, since the second photographing means is provided for capturing the position of the outer peripheral surface of the web roll, any means capable of capturing the position of the outer peripheral surface is not limited to the photographing means. Therefore, the eccentricity inspection apparatus for rolled paper according to the invention of claim 7 is characterized in that the second photographing means is a line sensor capable of detecting a deviation of a measurement position from a predetermined position.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wrapping paper eccentricity inspection apparatus according to the present invention.

FIG. 1 is a schematic side view of a wrapping paper eccentricity inspection apparatus according to this embodiment. A wrapping paper roll 1 used for eccentricity inspection is wound around a paper tube or core 2. The width and winding length are in accordance with the demands of the consumer.

A first camera 3 of a CCD camera is provided as first photographing means as opposed to an end side surface of the core 2 so that the end side surface of the core 2 is photographed by the first camera 3. It is. The optical axis of the photographing optical system of the first camera 3 is set parallel to the central axis of the core 2.

Behind the first camera 3, the core 2
The support arm 4 is disposed at a position facing the side surface of the end portion and rotatable about an axis parallel to the optical axis. The support arm 4 can be extended and contracted by a cylinder or other actuator 5. It is preferable that the rotation axis of the support arm 4 coincides with the optical axis of the first camera 3. 7 is a support arm 4
Is a turning mechanism.

Then, at the tip of the support arm 4,
A second camera 6 as a second photographing means is supported.
The optical axis of the photographing optical system of the second camera 6 is set parallel to the optical axis of the photographing optical system of the first camera 3, and is turned by the rotation of the support arm 4. The length of the support arm 4 is adjusted by operating the actuator (not shown) according to the outer diameter of the web roll 1 so that the outer peripheral edge of the web roll 1 can be photographed by this rotation.

FIG. 2 and FIG. 3 show a schematic structure in the case where the eccentricity inspection device for the paper roll is mounted, and the smallest diameter paper roll 1a and the most small diameter which can be inspected by the eccentricity inspection device. A large-diameter web roll 1b is also shown. These rolls 1 are to be mounted on an inspection stand 8 composed of a pair of support rolls 8a and 8b. When the rolls 1 are placed on the inspection stand 8, the center of the core 2 of the roll 1 becomes It is located above a predetermined position. An eccentricity inspection device including the first camera 3, the support arm 4, the second camera 6, and the like is attached to the elevating device 9, and the first camera 3 is positioned at a position where the core 2 can be photographed. It is possible to make it.
The eccentricity inspection device including the first camera 3, the support arm 4, the second camera 6, and the like is disposed on both sides of the web roll 1 mounted on the inspection gantry 8. For this reason, the eccentricity inspection of the web roll 1
It can be done at both ends.

The position data captured by the first camera 3 and the second camera 6 and the data relating to the rotation angle and length of the support arm 4 are input to a processing device (not shown).

The operation of the web eccentricity inspection apparatus according to this embodiment configured as described above will be described below with reference to FIG. Note that a coordinate system having the rotation axis of the support arm 4 as an origin is a reference coordinate system, and a coordinate system having an origin at a predetermined point in an imaging range of the first camera, for example, an intersection with an optical axis is a first coordinate system. Description will be made on the assumption that the origin of the first coordinate system and the origin of the reference coordinate system match.

When the web roll 1 to be inspected is fed to the eccentricity inspection device by a transport device (not shown) and is mounted on the inspection stand 8, the center of the core 2 of the web roll 1 becomes the center. It will be located on a vertical line at a predetermined position of the inspection stand 8. By operating a lifting device (not shown), the first camera 3 and the support arm 4 are moved up and down so that the core 2 is located within the shooting range of the first camera 3. The length of the support arm 4 is set to a position where the second camera 6 can take a picture of the outer peripheral edge of the web roll 1 so that the actuator 5
Activate to adjust.

When the first camera 3 captures the core image C of the core 2, since the core 2 is substantially a perfect circle, its center Q can be obtained from the position data of the core image C. 3, since it can be obtained as the coordinates of the first coordinate system, and since the origin of the first coordinate system coincides with the origin of the reference coordinate system, the center Q of the core 2
Can be obtained as coordinates on the reference coordinate system. The coordinates of the center Q in the reference coordinate system are represented by (x _SQ ,
y _SQ ).

Then, while rotating the support arm 4,
The outer peripheral edge of the web roll 1 is photographed by the second camera 6. At this time, an image of the outer peripheral edge is acquired while rotating the support arm 4 at an appropriate angle. For example, suppose that the image at the position of the point R on the outer periphery is acquired by the second camera 6 in FIG. Since this point R can be represented by coordinates in the second coordinate system having the optical axis of the photographing optical system of the second camera 6 and other arbitrary points as the origin, for example, the second camera 6 having the optical axis as the origin can be displayed. Let the coordinates of this point R in the second coordinate system be (x _2R , y _2R ).

The length of the support arm 4 is known since it can be easily recognized by counting the number of pulses of the actuator 5 using a pulse motor or providing an encoder or the like. The origin of the second coordinate system in the second camera 6 is a fixed point, and since the rotation angle θ of the support arm 4 at the time when the image of the point R is acquired is known, the coordinates of the point R on the second coordinate system are known. (X _2R ,
y _2R ) can be obtained as coordinates (x _SR , y _SR ) in the reference coordinate system. That is, when an arc D indicated by a broken line in FIG. 4 represents the locus of the origin of the coordinate system of the second camera 6 due to the rotation of the support arm 4, the straight line in the radial direction of the arc D passing through the point R the coordinates in the reference coordinate system of intersection S between the arc D, the point P coordinates _{(x SP, y SP) =} (x S0,
y _S0 ) and the rotation angle θ.
Is the origin of the coordinate system of the second camera 6, the coordinates (x _SR , y _SR ) of the point R in the reference coordinate system can be obtained.

The coordinates (x) of the center Q of the core C in the reference coordinate system with the rotation axis P of the support arm 4 as the origin.
_SQ , y _SQ ) are also required.
Can be calculated as the distance between two points in the reference coordinate system.

Accordingly, the outer shape of the web roll 1 can be obtained by obtaining the distance L at each position from the coordinates of the point R in the reference coordinate system while intermittently rotating the support arm 4 at appropriate angles. .
4, the outer shape F of the web roll 1 in relation to the arc D of the origin locus of the coordinate system of the second camera 6 is shown by a solid line.

In order to obtain the outer shape F of the web roll 1, a continuous outer shape F can be obtained by obtaining each point R by setting the intermittent rotation angle of the support arm 4 to every 1 degree. However, since the maximum value and the minimum value of the radius of the web roll 1 are obtained, it is not necessary to obtain the outer shape F. For example, if the points R are obtained at regular intervals with the intermittent rotation angle being an appropriate angle, the general outer shape of the web roll 1 can be obtained. Therefore, the maximum value and the minimum value of the radius are obtained from the general shape. Can be. In addition, the points R are obtained at appropriate regular intervals, and the above-mentioned L is calculated. When L in the measured value of the adjacent point R changes from increase to decrease or from decrease to increase, these adjacent points are changed. Point R
If the number of measurement points R is large and L is calculated, the maximum value and the minimum value of the radius can be calculated almost accurately.

Then, the difference between the calculated maximum value and the minimum value of the radius of the web roll 1 may be defined as the amount of eccentricity.

In the above description, the core 2 and the web roll 1 photographed by the first camera 3 and the second camera 6 are used.
In obtaining the coordinates of a predetermined point by processing the image, the contrast of the pixels on the imaging surface can be obtained by image processing using a CCD camera for these cameras 3 and 6. In order to sharpen the contrast of the image at a predetermined measurement point, for example, a core material having a color capable of showing a clear contrast with the color of the web roll 1 is inserted into the core 2, and the like. Just capture the image.

In the above description of the operation, it has been described that the rotation axis P (the origin of the reference coordinate system) of the support arm 4 coincides with the origin of the first coordinate system formed by the imaging range of the first camera 3. However, due to the mechanism of the apparatus, the origin of the reference coordinate system may not coincide with the origin of the first coordinate system. In the case of such a mechanism, the coordinates of the origin of the reference coordinate system in the first coordinate system are detected, and an operation for matching the origin of the first coordinate system with the origin of the reference coordinate system is performed from the detection result. What is necessary is just to perform conversion between coordinate systems. Then, the coordinates of the rotation axis P of the support arm 4 in the first coordinate system can be obtained, for example, by the following method. Note that if an operation is performed to match these origins in the early stage of operation and the data is stored, the data can be used in subsequent measurements, but the relationship between these origins may be shifted due to aging or the like. In such a case, the relationship between these origins may be obtained.

A test chart in which a predetermined pattern or the like is described is set so as to be orthogonal to the rotation axis P of the support arm 4 and is installed so as to rotate together with the support arm 4. The first camera 3 captures an image of a predetermined portion of the test chart. Since the captured image is fixed to the first camera 3, the captured image is located on an arc centered on the rotation axis P of the support arm 4. By obtaining the center of the arc of this image, the captured image is obtained. The coordinates of the rotation axis P of the support arm 4 on one coordinate system can be obtained.

FIG. 4 is a diagram showing the coordinates of the center Q of the core 2 and the point R on the outer peripheral surface of the web roll 1 in the reference coordinate system with the point P as the origin. The coordinates (x _SR , y _SR ) of the point R on the outer peripheral surface of the web roll 1 in the reference coordinate system are the distance r from the rotation axis P of the support arm 4 to the origin of the second coordinate system of the second camera 6, From the distance λ between the point R and the point S and the rotation angle θ of the support arm 4,

X _SR = (r + λ) × cos θ y _SR = (r + λ) × sin θ

Then, the distance L between the center Q of the core 2 and the point R
Is obtained by using x _SR and y _SR of the above equation (1).

L = ((x _SR −x _SQ ) ² + (y _SR −y _SQ ) ² ) ^1/2

When the image at the point R is captured by the second camera 6, the shutter of the second camera 6 is opened and closed while the support arm 4 is continuously rotated without intermittent operation. If the image at the angled position is input to a processing device or the like, data relating to the outer peripheral surface of the web roll 1 can be acquired only by rotating the support arm 4 once.

In this embodiment, the case where the length of the support arm 4 is fixed when capturing the image of the point R on the outer peripheral surface of one web roll 1 has been described. When the position of the dynamic axis P and the position of the center Q of the core 2 are largely displaced from each other, the length of the support arm 4 may not be constant. In such a case, the image of the point R is captured after the position of the support arm 4 is adjusted so that the rotation axis P and the center Q are close to each other. The image at the point R can be captured by contracting at each position corresponding to R. In this case, the rotation angle θ of the support arm 4
And the length may be obtained as data.

Furthermore, if the optical axis of the photographing optical system of the first camera 3 and the rotation axis of the support arm 4 are mechanically matched, the operation and the capture of the image of the point R become easier. .
Further, if the images captured by the first camera 3 and the second camera 6 are displayed on the monitor, and the work is performed while visually recognizing the monitor, the operation becomes easier.

FIG. 5 shows the maximum eccentricity when the eccentricity of the web roll 1 is measured by the web eccentricity inspection apparatus according to the present invention and the conventional inspection method, and the time required for the measurement. The results are shown. In the drawing, Example 1 shows the result of measurement on the roll 1b of 1060 mm in diameter by the eccentricity inspection apparatus for paper of the present invention, and Example 2 shows the result of measurement on the roll 1a of 800 mm in the same manner. . Comparative Examples 1 and 2 also show the results of measuring the eccentricity of the web roll 1b and the web roll 1a by hand using a conventional nose which has been conventionally used, as in the conventional case. In Comparative Examples 3 and 4, the eccentricity of the paper roll 1b and the paper roll 1a was carefully measured by hand using a nose adjusted and adjusted according to the core 2, respectively. This is a value indicating the true dimension.

Comparing the measurement results shown in FIG. 5, the measured maximum eccentricity is more true for the measurement result using the eccentricity inspection apparatus according to the present invention than for the measurement results of Comparative Examples 1 and 2. And almost satisfied data could be obtained. In addition, the measurement time can be reduced to 1/4 of that of the conventional method, which is advantageous in terms of the measurement time.

[0047]

As described above, according to the web eccentricity inspection apparatus of the present invention, the first photographing means for photographing the paper tube and the second photographing means for photographing the outer peripheral portion of the paper roll are provided. Is provided to determine the eccentricity of the web roll from the images captured by these photographing means, so that the eccentricity can be inspected without manual operation, and the occurrence of an artificial measurement error is reduced. Can be eliminated. In addition, since the inspection can be performed without contacting the web roll, the inspection can be performed smoothly.

Further, according to the eccentricity inspection apparatus for a rolled paper according to the second aspect of the present invention, for example, the first photographing means in which the outer diameter of the paper tube is large and is fixed captures the entire image of the paper tube. Even in the case where it is impossible to perform the operation, the center of the paper tube can be obtained by capturing the image of the outer periphery of the paper tube while rotating the first photographing means. Therefore, it is possible to reduce the size of the eccentricity inspection device without increasing the size of the first photographing unit.

Further, according to the eccentricity inspection apparatus for web paper according to the third aspect of the present invention, the eccentricity of web paper rolls of various diameters can be easily inspected by changing the length of the support arm. Can be.

Further, according to the eccentricity inspection apparatus of the rolled paper according to the invention of claim 4, the image of the paper tube captured by the first photographing means is obtained by the rotation of the support arm by the second photographing means. Since the positions of the images on the outer peripheral portion of the take-up paper roll can be easily overlapped, arithmetic processing can be performed quickly, and the inspection of the eccentricity can be performed in a short time.

According to the fifth aspect of the present invention, the number of images on the outer peripheral portion of the web roll captured by the second photographing means can be reduced, so that the data to be acquired is reduced, and processing for processing the images is performed. The capacity of the processing device can be reduced. Therefore, the cost of the eccentricity inspection device for the paper roll can be reduced.

According to the eccentricity inspection apparatus for a rolled paper according to the sixth aspect of the present invention, the first and second photographing means can be reduced in size. The size can be reduced.

Further, according to the eccentricity inspection apparatus for rolled paper according to the invention of claim 7, a more inexpensive eccentricity inspection apparatus can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic front view for explaining the structure of a web eccentricity inspection device according to the present invention.

FIG. 2 is a front view showing a schematic structure in a case where the eccentricity inspection device for rolled paper according to the present invention is mounted.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a diagram for explaining a principle of calculating an eccentricity amount by the web eccentricity inspection device according to the present invention.

FIG. 5 is a diagram comparing a result obtained by measuring with the eccentricity inspection device for web paper according to the present invention, a result obtained by measurement by a conventional method, and a result obtained by careful measurement by hand;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 roll paper roll 2 core (paper tube) 3 first camera (first photographing means) 4 support arm 5 actuator 6 second camera (second photographing means) 7 rotating mechanism 8 inspection stand 9 elevating device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F065 AA12 AA17 AA20 AA26 AA51 BB08 CC00 DD06 FF04 FF65 JJ02 JJ03 JJ05 JJ09 JJ25 JJ26 MM09 MM25 PP02 PP03 PP05 PP11 QQ00 QQ21 QQ25 QQ31 SS02 SS13

Claims (7)

[Claims] 1. A first photographing means provided with an optical axis of a photographing optical system parallel to a longitudinal direction of a paper tube at a position facing an end side surface of a paper tube of a take-up paper roll used for eccentricity inspection. A support arm rotatably provided about an axis in a direction parallel to an optical axis of the first photographing means at a position facing an end side surface of an end of a paper tube of the web roll, supported by the support arm, A second photographing means including a photographing optical system having an optical axis parallel to the optical axis of the first photographing means, wherein the first photographing means photographs an end of the paper tube; The outer peripheral portion is photographed while rotating the means along the outer periphery of the web roll by the rotation of the support arm, and the center of the paper tube is obtained from the image of the paper tube captured by the first photographing means. The eccentricity of the web roll is measured from the image of the outer peripheral portion captured by the second photographing means. Eccentricity inspection device of the web, characterized by. 2. A support arm provided rotatably at a position facing an end side surface of an end portion of a paper tube of a take-up paper roll to be subjected to an eccentricity inspection, around a direction parallel to a longitudinal direction of the paper tube, and A first photographing means which is provided near the center of rotation of the support arm and in which the optical axis of a photographing optical system is rotated by the rotation of the support arm; A second photographing means provided with a photographing optical system having an optical axis parallel to the optical axis of the first photographing means, wherein the first photographing means photographs an end of the paper tube; The outer periphery is photographed while being rotated along the outer periphery of the web roll by the rotation of the support arm, and the center of the paper tube is obtained from the image of the paper tube captured by the first photographing means, From the image of the outer peripheral portion captured by the photographing means, the amount of eccentricity of the web roll Eccentricity inspection device of the web, characterized in that the measuring. 3. The apparatus according to claim 1, wherein a length of said support arm is variable, and a distance between an optical axis of said first photographing means and an optical axis of said second photographing means is variable. 3. The eccentricity inspection device for rolled paper according to claim 1. 4. A winding device according to claim 1, wherein an optical axis of a photographing optical system of said first photographing means and a center of rotation of said support arm coincide with each other. Paper eccentricity inspection device. 5. The apparatus according to claim 1, wherein the second photographing means captures an image of an outer peripheral portion of the web roll each time the support arm is positioned at a predetermined angle while rotating the support arm. An eccentricity inspection device for web paper according to any one of claims 1 to 4. 6. The first photographing means and the second photographing means are C
6. The eccentricity inspection apparatus for a paper roll according to claim 1, wherein the apparatus is configured by a CD camera. 7. The winding device according to claim 1, wherein the second photographing means is a line sensor capable of detecting a deviation of a measurement position from a predetermined position. Paper eccentricity inspection device.