JPH0783643A - Inspecting apparatus for rolled condition of can - Google Patents

Abstract

PURPOSE:To simplify a mechanism and to simplify an inspection operation. CONSTITUTION:A can 1 to be inspected, which is inserted along an insertion direction A, is held in an inspection position by a fixed roller 15, a first moving roller 241 and a second moving roller 242. After that, the height of the can 1 to be inspected at the position of a rolled part for the can 1 to be inspected, which is irradiated with X-rays XRAY, is measured by a height measuring means which is composed of an air cylinder in which a bar is attached to the tip, and of a scale. When the height of the measured can 1 to be inspected is normal, the X-rays XRAY are radiated from an X-ray generator 11, and the rolled condition of the can 1 to be inspected is inspected. After that, the fixed roller 15 is turned by the prescribed number of revolutions via a belt by a motor for the fixed roller, the can 1 to be inspected is turned by 120 deg., and the above operation is then repeated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can winding state inspection device, and more particularly to a can winding state for nondestructively inspecting the can winding state by irradiating the can winding portion with X-rays. Regarding inspection equipment.

[0002]

2. Description of the Related Art A method of inspecting a winding state of a can for nondestructively inspecting a winding state of a can 130 in which a can body 131 and a can lid 132 are both wound and sealed as shown in FIG. 4B. As
Conventionally, as shown in FIG. 1A, the winding portion of the can 130 is irradiated with X-ray X _RAY to obtain an X-ray image (cross-sectional image) of the winding portion,
There is a method in which a cross-sectional image of the tightening portion of the can 130 is extracted from the brightness distribution of the obtained X-ray image, and then the dimensions of each predetermined portion such as the bending amount of the tightening portion of the can 130 is obtained (Japanese Patent Laid-Open No. 4-43). 136
702).

As shown in FIG. 1A, a can winding state inspection device capable of realizing such a winding state inspection method is shown in FIG.
X-ray X _RAY is emitted in the tangential direction of the winding part of 130
X-ray tube 151 for irradiating X-ray X _RAY to the winding tightening part of
The can 130 receives the X-ray X _RAY transmitted through the winding part of the can 130.
X-ray camera 152 for obtaining an X-ray image of the winding portion of the
From the X-ray image of the winding portion of the can 130 obtained by the line camera 152, a winding portion cross-section image P as shown in FIG. 7B is obtained, and the winding of the can 130 is performed from the obtained winding portion cross-section image P. And an image processing circuit (not shown) for obtaining the dimensions of each predetermined portion such as the amount of bending of the tightened portion.

When inspecting whether or not the can 130 is tightened in a predetermined manner, X-ray X _{RA Y} is emitted from the X-ray tube 151 in the tangential direction of the canned part of the can 130, and the X-ray is emitted. X _RAY can
It is irradiated to the winding part of 130. The X-ray X _RAY transmitted through the winding portion of the can 130 is received by the X-ray camera 152. As a result, the X-ray image of the winding portion of the can 130 is obtained by the X-ray camera 152. Subsequently, in the image processing circuit, a winding section cross-section image P is extracted from the brightness distribution of the X-ray image of the winding section of the can 130 obtained by the X-ray camera 152, and then the winding section cross-section image P is extracted. from the coordinate point Y ^1, Y ⁵ coordinate point X ¹ to X ⁵ and Y axes of the X-axis of each part of the P, the dimensions of each predetermined site, such as bending of seamed portions of the can 130 is determined.

Here, the size of each required predetermined part
The width W of the winding portion of the can 130 as shown in FIG.
And a thickness T and a cover which is a folded back portion of the can lid 132.
The hook length (cover hook length CH) and the can body 131
The length of the body hook that is the folded part (body hook
Long BH) and the overlapping part of the cover hook and body hook
Is the overlap length (overlap length OL)
And these dimensions are for each part of the winding section cross-sectional image P.
X-axis coordinate point X¹~ X^FiveAnd Y-axis coordinate point Y ¹, Y^FiveOr
The following calculation is performed.

W = X ₂ -X ₁ (1) T = Y ₂ -Y ₁ (2) CH = X ₂ -X ₄ (3) BH = X ₅ -X ₃ (4) OL = X ₅ -X ₄ (5)

[0007]

However, for example, when the can 130 itself is greatly deformed in the canning process, the winding of the can 130 itself does not work well, resulting in a large dimensional deviation. Become. In such a case, it is not necessary to inspect the canned state of the can by the above-mentioned X-ray, and
The height of the can 130 can be checked by measuring the height of the can. Therefore, the height of the can 130 is generally measured before the can is checked.

However, the height of the can 130 is conventionally measured separately from the above-described inspection of the canned state of the can by X-rays. Moreover, since the height of the can 130 is usually measured at several points after the can 130 is fixed on a flat surface, the mechanism is complicated in the entire can tightening state inspection including the height measurement. At the same time, the inspection work is complicated and time-consuming.

An object of the present invention is to provide an apparatus for inspecting the winding state of a can, which simplifies the mechanism and simplifies the inspection work.

[0010]

SUMMARY OF THE INVENTION According to the can winding state inspection device of the present invention, the can winding state in which the can body and the can lid are both wound and sealed is placed at the inspection position. In a canned state inspection device for measuring and inspecting the dimensions of a predetermined part of the can body and the can lid from the luminance distribution of the canned part cross-sectional image obtained by irradiating the canned part with X-rays. A holding means for holding the can at the inspection position, a rotating means for rotating the can at a predetermined angle while holding the can at the inspection position, and a position of a tightening portion of the can irradiated with the X-rays And a height measuring means for measuring the height of the can.

[0011]

The apparatus for inspecting the canned state of the can according to the present invention is provided with the height measuring means for measuring the height of the can at the position of the canned portion of the can which is irradiated with X-rays. After measuring the height of the can at the position of the winding portion to be inspected, the winding state inspection by X-ray can be continuously performed without moving the can to another place. Further, the holding means for holding the can at the inspection position and the rotation means for rotating the can at a predetermined angle while holding the can at the inspection position are provided with a predetermined angle while the can is held at the inspection position. Since the can can only be rotated, the height measurement and the winding state inspection can be continuously performed at several points of the can without moving the can from the inspection position.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 are views showing the structure of an embodiment of the canned state inspection device for a can according to the present invention.

The can winding state inspection device of this embodiment comprises a winding state inspecting means for inspecting the winding state of the inspected can 1, and a holding means for holding the inspected can 1 at the inspection position. Rotating means for rotating the can 1 to be inspected at a predetermined angle while holding the can 1 to be inspected, and the can 1 to be inspected to which X-ray X _RAY is irradiated.
Height measuring means for measuring the height of the inspected can 1 at the position of the winding portion 2. The details of each component of the can winding state inspection device of this embodiment will be described below.

(1) Winding state inspection means As shown in FIG. 1, the winding state inspection means emits X-rays X _RAY in the tangential direction of the winding portion 2 (see FIG. 2) of the can 1 to be inspected. X-ray generator 11 for irradiating the tightening portion 2 of the can 1 to be inspected with X-ray X _RAY , and the X transmitted through the tightening portion 2 of the can 1 to be inspected.
An X-ray camera 12 for receiving the X-rays X _RAY to obtain an X-ray image of the fastening portion 2 of the inspected can 1, and an X-ray of the fastening portion 2 of the inspected can 1 obtained by the X-ray camera 12. From the image, a winding section cross-section image P as shown in FIG. 4B is obtained, and from the obtained winding section cross-section image P, a predetermined amount of each predetermined portion such as the bending amount of the winding section 2 of the inspected can 1 is obtained. An image processing circuit (not shown) for obtaining dimensions.

(2) Holding Means and Rotating Means The holding means and the rotating means include the fixed roller 15, the first L arm 20 ₁ , the second L arm 20 ₂ and the fixed roller 15 via the belt 27. It includes a fixed roller motor 28 (see FIG. 2) for rotation, a holding table 29 (see FIG. 2) having a flat surface, and an insertion means (not shown) for inserting the inspected can 1 into the inspection position.

Here, the first L arm 20 ₁ has a first short piece 21 ₁ and a _first end fixed to one end of the first short piece 21 ₁ via a _first fixing shaft 23 1. Long piece of 22 ₁
And a first movable roller 24 ₁ rotatably attached to the other end of the first long piece 22 _{1 about} an axis. The first of the first short side 21 ₁ of the L-arm 20 _1, the first
Is rotated about the first shaft 25 ₁ provided at the other end of the _first short piece 21 ₁ by a motor (not shown). That is, the first L arm 20 ₁ rotates the first short piece 21 ₁ about the first shaft 25 ₁ to move the first fixing shaft 23 ₁ and the first long piece 22 ₁ . It is configured such that the first movable roller 24 ₁ is moved toward the fixed roller 15 via the intermediate roller 24 ₁ .

Further, the second L arm 20₂ Is the second short
Piece 21₂ And one end is the second short piece 21 ₂ The second solid at one end of
Fixed shaft 23₂ Second long piece 22 fixed via₂ When,
Second long piece 22₂ Rotatably attached to the other end of the shaft
The scraped second movable roller 24₂ Consists of. In addition,
2 L-arm 20₂ Second short piece 21 of₂ Is the second mo
The second short piece 21₂ Provided at the other end of
Second axis 25₁ Can be rotated around. Sanawa
The second L arm 20₂ Is the second axis 25₂ Centered around
Second short piece 21₂ The second fixation by rotating
Axis 23₂ And the second long piece 22₂ Second movable through
Roller 24₂ Is moved toward the fixed roller 15.
It has become successful.

The can 1 to be inspected is inserted along the inserting direction A shown in FIG. 1 with the can lid as the surface side of the holding table 29 by the inserting means. The fixed roller 15 contacts the side surface of the winding portion 2 of the inspected can 1 that has been inserted, and X
The X-ray X _RAY emitted from the line generator 11 is provided at a position where the X-ray X _RAY irradiates the winding portion 2 of the inspected can 1 in contact with the fixed roller 15. The first L-arm 20 ₁ and the respective second L-arm 20 ₂ is inserted in symmetrical positions with respect to the direction A side in and fixed roller 15, the first movable roller 24 ₁ and the second movable roller 24 ₂ Fixed roller 15
It is provided on the side.

The can 1 to be inspected has a fixed roller 15, a first movable roller 24 ₁ and a second movable roller 2 as will be described later.
4 ₂ holds, but the position where the inspected can 1 is held by these is the “inspection position”.

(3) Height Measuring Means The height measuring means is, as shown in FIG. 3, an air cylinder 30 having a bar 31 attached to its tip, and the can 1 to be inspected from the position of the bar 31 of the air cylinder 30. And a scale 32 for measuring height. Here, the air cylinder 30 is provided above the fixed roller 15 in FIG. Therefore, this height measuring means measures the height of the inspected can 1 at the position of the winding portion 2 of the inspected can 1 to which the X-ray X _RAY is irradiated.

Next, the operation of the can winding state inspection device of this embodiment will be described.

Before the can 1 to be inspected is inserted, the first long piece 22 ₁ and the second L arm 2 of the first L arm 20 ₁ .
0 respectively ₂ second long piece 22 _2, and so as not to inhibit the insertion of the inspection can 1 has been retracted to a position deviated from the insertion path of the inspection can 1. When the inspected can 1 is inserted along the insertion direction A by the inserting means, the inspected can 1 is
At a position where a part of the winding tightening portion 2 of the
The inspected can 1 stops. Subsequently, the first short piece 21 of the _first L-arm 20 ₁ is rotated in FIG. 1 arrow direction by the first motor, the second L-arm 20
By short piece 21 ₂ second of ₂ is rotated in the drawing direction of an arrow by the second motor, the first movable roller 24 ₁ and the second movable roller 24 ₂ toward the fixed roller 15 Each can be moved. The first movable roller 24 ₁ and the second movable roller 24 ₂ are the inspected can 1
When it comes into contact with the side surface of the winding tightening portion 2 of the first L arm 20 ₁
The first short piece 21 ₁ and the second L arm 20 ₂ of the second
The rotation of the short piece 21 ₂ is stopped. As a result, the inspected can 1, as shown in FIG.
It is held at the inspection position by the movable roller 24 ₁ and the second movable roller 24 ₂ .

After that, the air cylinder 30 shown in FIG.
Thereby, the bar 31 is moved toward the holding table 29. A bar 31 is attached to the bottom of the can 1 to be inspected held at the inspection position.
The movement of the bar 31 stops at the point of contact. The height of the inspected can 1 can be measured by reading the position of the bar 31 at this time from the scale 32. The height of the inspected can 1 measured at this time is the height of the inspected can 1 at the position of the tightening portion 2 of the inspected can 1 irradiated with the X-ray X _RAY .

When the height of the inspected can 1 measured as described above is normal, the X-ray generator 11 shown in FIG.
When the X-ray X _RAY is emitted from the device, the canned state of the inspected can 1 is inspected. Since the winding state inspection method at this time is the same as the above-described conventional winding state inspection method, the details thereof will be omitted. At this time, the winding state is inspected in the winding portion 2 of the can 1 to be inspected.
This is the part in contact with the fixed roller 15. As described above, in the can winding state inspection device of the present embodiment, the winding can is clamped for the inspected can 1 held at the inspection position by the fixed roller 15, the first movable roller 24 ₁ and the second movable roller 24 ₂ . In order to perform the condition inspection, when inspecting the winding state of the inspected can, which is smaller than the inspected can 1 and shown by the one-dot chain line in FIG. Also in the case of inspecting the winding state of the inspected can, the winding portion for performing the winding state inspection can be the winding portion of the portion in contact with the fixed roller 15, so that the X-ray generator 11 Also, there is no need to change the position of the X-ray camera 12. Therefore, there is an advantage that cans of any size can be accommodated without changing the positions of the X-ray generator 11 and the X-ray camera 12.

When the canned state of the inspected can 1 inspected as described above is normal, the quality of the canned state cannot be judged at only one place. When you inspect three places every 120 °,
The fixed roller motor 28 shown in FIG. 2 rotates the fixed roller 15 through the belt 27 by a predetermined number of rotations, whereby the inspected can 1 is rotated by 120 °, and then the above-described operation is performed. Repeated. At this time, since the inspected can 1 is held in the inspection position by the fixed roller 15, the first movable roller 24 ₁ and the second movable roller 24 ₂ , the state in which the inspected can 1 is held in the inspection position Can be rotated by 120 °.

In order to rotate the inspected can 1 to the inspection position (the position in which the inspected can 1 is rotated by 120 ° in the above-described embodiment), for example, the rotation time of the fixed roller 15 is set by a microcomputer. The rotation of the fixed roller 15 may be stopped at the time when a preset rotation time has elapsed by controlling with a controller (not shown) using.

Further, a turntable is set as the inspected can 1, and the inspected can 1 is detected by detecting the rotation angle of the turntable using a known means for optically, magnetically or electrically detecting. May be accurately stopped at each inspection position.

In the above operation, if there is an abnormality in the measured value of the height of the inspected can 1 or the inspection result of the winding state, it may be judged as "defective" at that time, or three inspections may be performed. You may judge later by comprehensive judgment.

In the embodiment described above, the fixed roller 1
Although the inspected can 1 is rotated by 5, the set position of the inspected can 1 may be a turntable, and the inspected can 1 may be rotated by a predetermined angle by rotating the turntable by a motor. However, in this case, the fixed roller motor 28 and the belt 27 are unnecessary, and
The fixed roller 15 is preferably supported rotatably.

[0031]

Since the present invention is configured as described above, it has the following effects.

After measuring the height of the can at the position of the winding portion where the winding state inspection is performed, the winding state inspection by X-ray can be continuously performed without moving the can to another place. In addition, it is possible to continuously measure the height of several cans and inspect the winding condition without moving the can from the inspection position, which simplifies the mechanism of the entire can inspecting device. The inspection work can be simplified by shortening the measurement time.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of an apparatus for inspecting a winding state of a can of the present invention, and particularly showing a configuration of a winding state inspection means, a holding means and a rotating means.

FIG. 2 is a diagram showing a configuration of an embodiment of a can winding state inspection device of the present invention, in particular, a configuration of a holding means and a rotation means.

FIG. 3 is a diagram showing a configuration of an embodiment of a canned state inspection device for a can of the present invention, in particular, a configuration of height measuring means.

FIG. 4 is a diagram for explaining a method for inspecting a canned state of a can proposed in Japanese Patent Application Laid-Open No. 4-136702, FIG. 4A is a diagram showing a configuration of a canned state of a canned state inspection device;
(B) is a cross-sectional view showing an example of a cross-sectional image of the canning portion of the can,
(C) is a cross-sectional view showing the dimensions of each predetermined portion for inspecting the winding state of the can.

[Explanation of symbols]

1 inspected can 2 winding part 11 X-ray generator 12 X-ray camera 15 fixed roller 20 ₁ first L arm 20 ₂ second L arm 21 ₁ first short piece 21 ₂ second short piece 22 ₁ first Long piece 22 ₂ second long piece 23 ₁ first fixing shaft 23 ₂ second fixing shaft 24 ₁ first movable roller 24 ₂ second movable roller 25 ₁ first shaft 25 ₂ second Shaft 27 Belt 28 Motor for fixed roller 29 Holding stand 30 Air cylinder 31 Bar 32 Scale X _RAY X-ray P Winding section cross-sectional image A Insertion direction

Claims (1)

[Claims] 1. A winding state obtained by irradiating an X-ray to a winding portion of the can placed at an inspection position to determine a winding state of the can in which the can body and the can lid are both wound and sealed. A can winding state inspection device for measuring and inspecting dimensions of a predetermined portion of the can main body and the can lid from a luminance distribution of a partial cross-sectional image, a holding means for holding the can at the inspection position, and the can. Rotating means for rotating the can at a predetermined angle while being held at the inspection position, and height measuring means for measuring the height of the can at the position of the winding portion of the can irradiated with the X-rays. The device for inspecting the winding state of a can, which is characterized in that