JP2535448Y2 - Automatic measuring device for dimensions of can lid winding part - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically measuring the dimensions of a tightened portion between a metal can body for cans and a can lid using radiation.

[0002]

2. Description of the Related Art At present, measurement of internal dimensions of a body hook, a cover hook, an overlap, an upper clearance, a low work clearance and the like of a can lid winding portion is performed by cutting a measuring portion in an axial direction with a thread saw or the like and optically cutting it. The destructive type of measurement using a micro gauge or the like is the mainstream. However, the present applicant has disclosed in Japanese Patent Application Laid-Open Nos. 63-140906, 63-173906 and 63-173907.
No. 6,019,058, filed an application for a "method using radiation for measuring the dimensions of a can lid winding portion". On the other hand, Japanese Patent Application Laid-Open No. 63-274808 and Japanese Patent Application Laid-Open
No. 74851, JP-A-63-274853,
Japanese Patent Application Laid-Open No. 2-208546 discloses an invention in which radiation is used for inspection of a can cover winding portion. Among them, the device of the invention disclosed in the latest Japanese Patent Application Laid-Open No. 2-208546 is an inspection device for a can lid tightening portion, not for measuring the size of a can lid tightening portion. Means for holding the can at a predetermined angle, and means for rotating the can about the axis, in order to measure the dimensions of the canned portion of the can at a plurality of locations,
The embodiment discloses a semi-automatic device for manually feeding cans into the device.

[0003]

Problems to be solved by the invention The destructive dimension measuring method is manual and causes errors. There is no automatic non-destructive dimension measuring apparatus utilizing radiation improved from this, and the above-mentioned publication only discloses a semi-automatic apparatus for inspecting a can lid winding portion. SUMMARY OF THE INVENTION It is an object of the present invention to provide a device capable of non-destructively measuring the internal dimensions of a can lid tightening portion by using radiation and which is fully automatic.

[0004]

SUMMARY OF THE INVENTION An automatic measuring apparatus for measuring the size of a can lid tightening portion of the present invention is an apparatus for automatically measuring the size of a can lid tightening portion using radiation, comprising: a radiation source; An imaging tube for capturing a radiographic image, a carry-in conveyor for carrying in a can to be measured, and a carry-out conveyor for carrying out a measured can,
A lift table that receives cans from the carry-in conveyor, holds the cans at the measurement position, and passes the measured cans to the carry-out conveyor, a work slider that moves the cans on the lift table between the radiation source and the imaging tube, and works It comprises a reference gauge that moves from between the radiation source and the imaging tube as the rider operates.

[0005]

[Function] Since the device for automatically measuring the dimensions of the can lid winding portion of the present invention has the above-described structure, the can to be measured is received from the carry-in conveyor by the elevating table, carried to the measuring position, and the reference is first measured at the measuring position. The dimensions of the gauge are measured, and then the work slider is used to move the can between the radiation source and the image pickup tube to measure the dimensions of the can lid fastening portion. When the work slider moves the can between the radiation source and the imaging tube, the reference gauge
Since it moves with that movement, it is possible to carry the can lid tightening part of the measured can to the place where the reference gauge was measured,
It is possible to compare the measured value of the reference gauge with the measured value of the can cover tightening portion, and it is possible to measure the actual dimensions of the tightening portion. Then, for the can whose dimensions have been measured, the work slider returns to the original position, the lifting table moves to the position where the can is passed to the carry-out conveyor, passes the can, and moves to the next measuring operation. Therefore, the size measuring device for the can lid fastening portion of the present invention can measure the actual size of the can lid fastening portion fully automatically.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
In the figure, reference numeral 1 denotes an X-ray source for generating a soft X-ray, wherein the X-ray source 2 generates a soft X-ray. Machine frame 22 to irradiate lines horizontally
The irradiation and blocking of X-rays are performed by opening and closing a shutter 202 which is opened and closed by an air cylinder 201. Reference numeral 3 denotes a vidicon camera, which is fixed to the cover of the apparatus and has a X in the vertical plane of the reference gauge.
A fluoroscopic image and an X-ray fluoroscopic image of a surface obtained by cutting the can lid tightening portion in the axial direction of the can are captured. In the figure, reference numeral 4 denotes a reference gauge, which serves as a ruler for measuring the actual size of each internal dimension of the can cover winding portion. 5 is an X-ray manual operation panel,
Reference numeral 6 denotes a monitor that displays a digital image of the tightened portion, a graph of each measured value and an average value, and the like. X-ray manual panel 5
When the switch is operated, X-rays are emitted and the monitor 6
A perspective image of the reference gauge is displayed on the screen, and the state of the apparatus can be checked. Reference numeral 7 denotes a computer, which compares a reference value and a measured value to calculate dimensions such as a body hook, a cover hook, an overlap, an upper clearance, a low work clearance, and a tightening width, and calculates a plurality of measurement results. Performs statistical processing and controls the operation of the entire device. 8
Is an image synthesizing boat installed in the computer 7, and this image synthesizing board 8 sets a reference value by comparing a preset set value with an actually measured value of a reference gauge. I do. Reference numeral 9 denotes a keyboard for inputting a desired command to the computer 7, reference numeral 10 denotes a printer for printing out the screen of the monitor 6, and reference numeral 11 denotes an image processing device, which converts an imaged screen of the vidicon camera 3 into a digital signal. 26 is a camera controller in the figure.

Next, the mechanical part of the device of the present invention will be described. In the figure, reference numeral 12 denotes a carry-in conveyor for carrying the can 1 into the measuring apparatus, and moves in the direction of arrow A shown in FIG. 3 to carry in the can 1 to be measured. Reference numeral 13 denotes a carry-out conveyor for carrying the can 1 out of the apparatus, and moves in the direction of arrow B in FIG. 3 to carry out the can 1. Both conveyors 12, 13 are installed on the floor in parallel with each other. Numeral 14 denotes a supply pusher, which moves the can 1 on the carry-in conveyor 12 which is in contact with the supply pusher 14 in the direction of arrow C shown in FIG. To slide on the relay board 25 to supply the cans onto the elevating table 16 which will be described in detail later. Reference numeral 15 in FIG. 3 denotes a work stopper, and the work stopper 15 is a supply pusher 14.
When the machine 1 supplies the can 1 onto the lifting table 16, the machine frame 20 is positioned so that the can 1 is positioned at the correct position on the lifting table 16.
The can 1 is moved in the direction of arrow D by an air cylinder 151 fixedly mounted on the container 1 to support the can 1 from the opposite side of the supply pusher 14. The lifting table 16 includes an air cylinder 161
(FIG. 4) and the can 1 on the lifting table 16
Is locked to a can-fixing chuck 190 of the positioning unit 19 described later.

The lifting table 16 and the air cylinder 16
1 can be moved by the work slider 17 in the direction of arrow E shown in FIG. 3 in a state where the can 1 is locked on the chuck 190 for fixing the can. Work slider 17 that controls this movement
Is the air cylinder 1 that raises and lowers the lifting table 16
61, an air cylinder 171 having one end fixed to the machine frame 21, and a side plate 1 centering on a shaft 172 when the air cylinder 171 is extended as shown in FIG.
The link mechanism has one end for moving 70 in the direction of arrow E fixed to the machine frame 20 and the other end fixed to the side plate 170. On the end plate 194 at the upper end of the side plate 170, the can-fixing chuck 190 is rotated by 120 ° by the servo motor 191 and the sensor 192 so as to rotate the lifting table 16.
A positioning unit 19 for rotating the upper can 1 by 120 ° about the can axis is provided. This positioning unit 1
9 is a roller 1 rotatably fixed to a horizontal machine frame 22.
When the side plate 170 of the work slider 17 is rotated in the direction of the arrow E, the can fixing chuck 190 and the roller 193 are locked to position the can 1. At this time,
An imaginary line passing through the center of the canned portion and perpendicular to the diameter of the can coincides with the center line of the X-line. On the other hand, when the work slider 17 is not operating,
When the surface to be measured of the canned portion is located at the time when is operated, the reference point of the reference gauge 4 fixed to the side plate 170 is X
It is located in line with the center line of the track. In the drawing, reference numeral 18 denotes an unloading pusher for pushing out the can 1 after measurement from the lifting table 16 to the unloading conveyor 13, and is operated by an air cylinder 181 fixed to the machine frame 24.

The operation of the present invention will be described below. First, when the start of measurement is input from the keyboard 9 to the computer 7, the computer 7 carries in about 12 cans through the carry-in conveyor 12 from a seamer that winds a can lid (not shown) around the can body. When the leading can 1 comes into contact with the supply pusher 14, the carry-in conveyor 12 stops,
The operation of the air cylinder 141 causes the supply pusher 14 to start pushing the can 1 toward the lifting table 16. At the same time, the work stopper 15 moves toward the lifting table 16 by the operation of the air cylinder 151, and the supply pusher 14 and the work stopper 15
Is sandwiched between the lifting table 16 and the can 1 is placed on the lifting table 16.
Place it on the upper fixed position. When the can 1 gets on the lifting table 16, the work stopper 15 and the supply pusher 14
Returns to the standby position shown in FIG. Supply pusher 14
Returns to the standby position, the carry-in conveyor 12 operates, and the can to be measured next is brought into contact with the supply pusher 14 and stopped. At the same time, as shown by a two-dot chain line in FIG. 4, the lifting table 16 is raised by the operation of the air cylinder 161, and the can cover tightening portion located at the upper end of the can 1 is fixed to the can fixing chuck 190 of the positioning unit 19. And stop. Then, the shutter 202 of the X-ray source 2 opens by the operation of the air cylinder 201, and soft X-rays are emitted toward the reference gauge 4. The irradiated soft X-ray passes through the reference gauge 4, and a fluoroscopic image obtained through the reference gauge 4 is captured by the vidicon camera 3. The analog signal of the vidicon camera 3 is sent to the image processing device 11,
The signal is converted into a digital signal and sent to the image synthesizing board 8. The image synthesizing board 8 calculates a reference value by comparing a preset value with a measurement value of the reference gauge 4 sent from the image processing apparatus, and transmits the reference value to the computer 7. The computer 7 stores the reference value as a reference for measuring the actual size of the can cover winding portion.

Next, the air cylinder 171 of the work slider 17 is operated to rotate the work slider 17 about the shaft 172 in the direction of the arrow E in FIG. It turns off from the X line, and eventually the can fixing chuck 190 of the positioning unit 19 and the roller 193 are locked, and the can cover winding portion is moved to the X position.
Installed at the measurement position across the track. Here, the shutter 202 of the X-ray source is opened, soft X-rays pass through the tightened portion, and the fluoroscopic image is sent from the vidicon camera 3 to the image processing device 11 and processed, and then input to the computer 7. Calculate each dimension. The calculated measured value is displayed on the monitor 6 and stored in the memory of the computer 7. Next, the servo motor 191 of the positioning unit 19 rotates while being controlled by the sensor 192, and rotates the can 1 by 120 ° together with the can fixing chuck 190.
Measure the dimensions of the tightened part. In this embodiment, one can is used.
Measure at three points every 20 °.

When the measurement at the three positions is completed, the air cylinder 171 of the work slider 17 returns to the previous position, and the work slider 17 rotates around the shaft 172 in the direction opposite to the direction of arrow E in FIG. And the reference gauge 4 also returns to the standby position crossing the X track. Subsequently, the air cylinder 161 of the elevating table 16 lowers the elevating table 16, and when the descent is completed, the air cylinder 181 of the unloading pusher 18 is operated, and the measured can 1 is slid over the relay plate 25 to unload the unloading conveyor. 13, and the measured can is carried out of the apparatus. When the unloading pusher 18 returns to the old position, the measurement of the next can is started by repeating the above operation. When the dimension measurement of the twelve cans is completed in this way, the computer 7 performs statistical processing such as an average value, a maximum value, a minimum value, and a standard deviation of each measured value, and sends the measured value and the average value to the monitor 6. To display a graph.

[0012]

[Effect of the invention] The dimension measuring device of the can lid winding part of the invention is:
Non-destructive, full-automatic measurement of the actual dimensions of the can lid winding section has been made possible.

[0013]

[Brief description of the drawings]

FIG. 1 is a schematic front view of the device of the present invention with a front panel removed.

FIG. 2 is a schematic plan view of the device of the present invention with the top plate removed.

3 is an enlarged schematic plan view showing a main part of a mechanical portion of the device of the present invention, and a plan view of a cross section taken along line XX of FIG.

FIG. 4 is an enlarged schematic front view showing a main part of a front part of a mechanical portion of the device of the present invention, and a cross-sectional view taken along line YY of FIG.

FIG. 5 is a side view showing a main part of FIG. 4;

[Explanation of symbols]

1; can to be measured 2; X-ray source 201; air cylinder
202; shutter 3; vidicon camera 4: reference gauge 5; X-ray manual operation panel 6; monitor 7; computer 8; image synthesizing board 9; keyboard 10; printer 11; image processing device 12; import conveyor 13; export conveyor 14; Supply pusher 15; Work stopper 16; Elevating table 17; Work slider 18; Unloading pusher 19; Positioning units 20, 21, 24; Machine frames 22, 23;
25; relay board 26; camera controller

Claims (1)

(57) [Scope of request for utility model registration] An apparatus for measuring the dimensions of a can lid tightening portion using radiation, a radiation source 2, an imaging tube 3 for capturing a radiographic image, a carry-in conveyor 12 for carrying a can to be measured, An unloading conveyor 13 for unloading cans,
The cans are received from the carry-in conveyor 12, the cans are held at the measurement position, and the cans on the elevating table 16 are transferred between the radiation source 2 and the imaging tube 3 by passing the measured cans to the carry-out conveyor 13. Work slider 17 to be moved
And a reference gauge 4 that moves between the radiation source 2 and the imaging tube 3 in accordance with the operation of the work slider 17.