JPS5871442A - Inspecting apparatus for bottles - Google Patents

Abstract

PURPOSE:To obtain an inspecting apparatus for bottles having the advantages of simple structure, inexpensive, and easy handling, by a method wherein a plurality of positions are detected around a center line of a bottle to be inspected, and predetermined effective scanning region signals are generated according to detected positions, respectively. CONSTITUTION:Light emitted from a light source 6 diffuses at a diffuser panel 5, transmits through a bottle to be inspected 2A and reaches a line scanner 3A. An inspection is started by a signal from a trigger means for starting an inspection at the time when the bottle 2A comes within the range. Since the height of thick portion of the bottle, which is determined according to the shape of the bottle, varies as the bottle 2A is shifted, the inspection band must also be varied with. A pulse generator 16 is provided for this reason. The number of pulses generated per the bottle 2A is the parting line number of bottle body in shifting direction, and the upper limit number is determined on the basis of starting interval of time and shifting speed of the bottle 2A. The ratio of timing pulleys 10-11 is decided by the above. Thus, an inspecting apparatus of simple structure and easy handling is obtained.

Description

[Detailed description of the invention] The present invention relates to a bottle testing device.

Inspection of empty bottles after washing in the bottling line has recently been automated, and the inspection of the bottom of the bottle, the opening of the bottle, and the residual water inspection have been automated, but only 80-90% of the surface area of the bottle is used.
Although various proposals have been made for side inspection of bottles, which account for 1.5% of the total, there are still problems such as larger and more expensive equipment, unstable bottle transport, and longer layouts. has not been put into practical use either.

For example, first, what is shown in the first factor plane view and the partially enlarged vertical cross-sectional view in FIG. The bottle BT conveyed by the screw 8C and the inlet star wheel 8F turns and rotates on the TR,
The inner mirror IM moves up and down by a cam, and the light source L on the side of the bottle BT
The light diffused from S through the diffuser plate DP passes through the inner mirror IM and enters the light receiving element LD, and the instantaneous field of view VF is small as shown in the side view of Fig. 3, but as the bottle BT rotates. As the inner mirror IM moves up and down, it scans the entire surface in a spiral pattern,
This method takes advantage of the fact that the amount of light changes when there is a foreign object, as shown in the diagram in FIG. 4, but it has the disadvantage that the device is large, expensive, and requires time and effort to maintain.

Next, place the bottle BT on the TR (the one shown in the 5th factor plane view and the partially enlarged vertical cross-sectional view in FIG. 6 is the turret) and rotate the bottle BT to prevent accumulation
Take the signal from the rotation of R, generate a sawtooth wave, and
As shown in the figure, the horizontal deflection coil is controlled so that it always scans on the center line of the bottle, but the device is large and
It is expensive and has the disadvantage of poor sanitary properties of the bottle label.In addition, the ones shown in Figures 8 and 9 are equipped with a solid-state camera or T
The side surface of the bottle BT is photographed by a V camera TV, and a signal S of an inspection area ED is generated starting from the edge signal ES of the bottle itself, and defects, foreign substances, etc. in that area HD are inspected. Since this method inspects only the center of the bottle, it requires a device to rotate and follow the bottle, and the device is large and expensive.

Furthermore, what is shown in FIG. 10 and FIG.
At SC, the interval between the bottles BT is widened, two sides of the camera are reflected on the solid-state camera CM via the reflector RM, and the inspection area ED written in the FROM is inspected, but the transportation of the bottles is unstable. The disadvantage is that the layout of the equipment becomes long.
Further, in the case shown in FIG. 12, one side of the bottle BT is inspected at the first inspection bottle position 15TP, and the second inspection bottle position 2NDP t is inspected.
During this process, the orientation of the bottle BT is changed and the other side is inspected, and the pitch of the bottle is shifted so that the first and second bottle inspection devices do not work at the same time, but the device is large and expensive. The present invention was proposed in view of these circumstances, and aims to provide a bottle inspection device with a simple structure, low cost, and low wear and tear. The inspection bottle apparatus detects the presence of defects or foreign substances by scanning in the direction of the center line of the bottle. The present invention is characterized by comprising means for generating a predetermined effective scanning area signal corresponding to each position.

An embodiment of the present invention will be explained with reference to the drawings. FIG. 13 is a plan view thereof, FIG. 14 is an enlarged vertical sectional view of FIG. 13, and FIG. Figure 16 is a partially enlarged side view showing the relationship with the inspection zone.
Figure 3 is a partially enlarged plan view showing the relationship between the test bottle and the field of view of the line scanner, Figure 17 is an explanatory diagram showing the relationship between the medium pulse signal of the test bottle and the effective field of view, and Figure 18 is the start pulse, A waveform diagram showing clock pulses and video signals, FIG. 19 is a plan view showing the relationship between the inspection range of the line scanner and the bottles to be tested, and FIG. 20 shows the signal processing device of FIG. 14! The lock diagram, Fig. 21 is an output waveform diagram of each part in Fig. 20, Fig. 22 is a partially enlarged view of Fig. 13, and Fig. 23 is a diagram of the output waveform of each part in Fig. 14.
FIG. 24, which is a partially enlarged view of the figure, is a plan view showing another bottle rotation means different from the push plate shown in FIG. 13.

First, in Figs. 13 and 14, 1 is a conveyor for conveying bottles, 2 is a bottle to be inspected, 2A and 2B are the bottles to be inspected at the moment they are being inspected, and jA and 3B are each arranged at an appropriate angle and are the bottles to be inspected. Test the bottle! 'A, a line scanner that scans JB, 4 a star wheel that conveys the bottle 2, 5 a diffuser plate that diffuses the light from the linear light source 6, 1 the rotation axis of the star wheel 4, 8.9 each rotation 18.14 A bearing that pivots the shaft 1; 10 a large-diameter tie holder fitted on the rotating shaft 1; 11 a small-diameter tie holder linked to the large-diameter tie holder 10 by a timing belt 12; 18.14
are the shafts 15 to which the small-diameter tie construction DAZOLI 1 is fitted.
1'6 is attached to one end of the shaft 15; 9) a pulse generator; 17 is a push plate for changing the direction of the bottle;
18 is line scanner jA.

3B, trigger device 1 j to be described later; 71 is a signal processing device that receives and processes a signal from the pulse generator 16;

Next, in FIG. 20, 100 and 100B are AND signals for extracting the start signals of the line scanners sA and 3B immediately after the signal from the pulse generator 16, respectively.
4 circuits, 1'0・H) v-a 1αJB is a delay circuit for making the lower part of the bottle body of the bottle to be tested a non-inspection zone, 1
02m, 10:tB is a 7-unit 270-horn F/F 1 circuit that operates after scanning the non-inspection zone at the bottom of the bottle body and is used as a dart for black and white shoes, respectively, and 103m is 7s, f
70. 10 AND1 circuits for inputting clock signals of F/F 1 circuit 102A and line scanner 3A
3B is A that inputs the clock pulses of Fritsunoflora 7” F/F1 circuit 102B and line scanner 3B.
The ND 1 circuit 104 operates in response to the signal from the trigger device 19 and commands the start of the test.AND 2
106 is a frizzo flop circuit F/Fl that stores the output of the ANDj circuit 105; 107 is an AND2 circuit 1;
05 is an encoder for encoding the output of 05, and 108 is a PROM (Prog
rammable ROM), 109 ROM is AND 1
A count comparison circuit that starts output by the 4 pulse input from the circuit 103A, compares the 4 pulse input with the set value of FROM 10 &, and stops the output when the input t4 pulse number exceeds the set value. , 109B starts outputting according to the number of pulses input from the AMD1 circuit 103B, compares the number of pulses inputted above with the set value of FROM108, and stops outputting when the number of input Δ pulses exceeds the set value. The count comparison circuits 1101 and 110B respectively input the e-) signal from the count comparison circuits 1091 and 109B, and the ANDJ circuits that input the foreign object signals from the foreign object discrimination circuit 111 and IIIB. 111 is an ANDJ circuit 1 which receives video signals from scanners JA and JB and converts them into foreign object signals.
10 is an OR circuit which inputs the outputs of ll0B, and 113 is a reject circuit that drives a reject device.

In such an apparatus, when the bottle 2 is transported by the star wheel 4 to the inspection position Afi, the light emitted from the light source 6 is diffused by the diffuser plate 5, passes through the bottle to be inspected 2A, and is sent to the line scanner 3A.・The line scanner 3A constantly scans the side of the bottle from bottom to top, so if the bottle under test 2
If a foreign object or the like is present on A and a change in light intensity occurs, this is processed by the signal processing device 18 as a foreign object signal.

When inspecting the side surface of the bottle, as shown in Fig. 15, the thick part T of the bottle generates a signal similar to that of a foreign object. As shown in FIG. 16, when the test bottle 2A enters the field of view VF of the line scanner 3A, the test is started in response to a signal from the test start trigger device 19, but the test bottle 2A moves. As the height of the thick wall portion changes depending on the shape of the bottle, the non-inspection zone is changed accordingly.

For this purpose, a pulse generator 16 is provided, and the timing axis 10 is connected to the rotation axis 1 of the star wheel 4. Timing belt 12. Timing pulley 11. It is driven via the shaft 15, and generates a pulse as shown in Fig. 17, P1++P1+....

The number of 9 pulses that occur in the test bottle jA1 is the number of divisions in the bottle side traveling direction, and its upper limit is determined by the start interval time of line scanner 3A and the feeding speed of bottle 2m).
This timing gooley 10. ．． ．． Determine the ratio of 11.

At this point, the inspection must be completed while the bottle moves from X to y-1 on the star wheel 4, as shown in FIG. To achieve this, a predetermined number of pulses are generated from the /4 pulse generator 1#, and for this purpose, the number of revolutions of the shaft 15 of the /4 pulse generator 16 is increased from the number of revolutions of the star wheel 40 to the number of revolutions of the shaft 10. There is a need to.

Next, in order to determine the effective range in the bottle height direction by inputting 1/4 lus, as shown in FIG. When HlpPl, the field of view must be set to a H*...etc. Figure 18 shows the line scanner's start/4 Luss, clock pulses, Luss, and tie-on of the PirO signal in comparison to the bottle height. (effective field of view) I, jH, --...
is determined by counting the clocks/l pulses of the two scanners, and Hjl, H, . . . are preset in the PROM 10 II of the signal processing device 18.

Further, the operation of the signal processing device 180 will be explained with reference to FIG.

That is, in the same figure, when the bottle comes to the inspection position A and the trigger device 19 is activated, the
The output of the second circuit 104 and the output of the next I pulse generator 16 are passed through the AND2 circuit 105 and then output to the second pulse generator 70.7' F/
'F J input to circuit 106 and encoder 107.

The output of the 7 rig 70 7'F/ff' 3 circuits 106 is connected to the start/example of the line scanners jA and 3B, respectively, and to the AND 4 circuits 100 at ID0B.
l is added to the delay circuit 101 for creating a non-inspection zone at the bottom of the bottle.
Input to 0IB. Next, 7s, f flora f F/l'
One circuit has 102 people, and 101B is set to scan the non-inspection zone at the bottom of the bottle barrel, and is input to AND 1 circuit 1081e103B.

Line scanner JA only while 101B is set in flip f70g F/F j circuit 101.

The click noise of 3B is counted, and the count comparison circuit 109 turns on the 109B at this first noise, turning on the dart of the AND3 circuit 1101 and 110B.

On the other hand, the output pulse of the AND2 circuit 105 is
01, and is pre-coded by bottle shape.
/? of the bottle height direction set to M J 08? Lus number,
In other words, when the bottle is in the position of P1, Hl
When is IP, Hl is called, and this value is used as the count comparison circuit 〆゛1σ, 9A.

109B respectively.

In this way, when the clock noise from 103B to the AMD1 circuit 103 exceeds this set value, the count comparison circuits 1091 and 109B are turned off, and the dart of 110B is turned off to the ANDJ circuit 110. %r-) ON period is the valid test period.

The video signals from the line scanners JA, , 9B are sent to the foreign object determination circuit 111, and if there is a foreign object in 111B, a foreign object signal is output, so the f-) of the ANDJ circuit 1101p110B is
During N, the foreign object signal is input to the OR circuit 112, and the output of the OR circuit 112 is the reject circuit 1 that drives the sect device.
13 is activated.

The output waveforms of each section described above are as shown in the timing chart shown in FIG.

In addition, the two subjects whose bottles were inspected at the inspection position A change the orientation of the bottle by about 90 degrees using the push plate 11 before reaching the inspection position B, as described below. That is, the push plate 11 is arranged horizontally as shown in FIG. 13 and laterally as shown in FIG. The bottle is transferred to the push plate 1
1, a braking force is applied to the 2 side of the bottle, and the bottle is further transferred by the star wheel 4. As shown in Fig. 13, the bottle rotates within the star wheel's The rotation angle is determined by the contact length of the presser plate 11 with respect to the bottle.Of course, as a means for rotating the bottle, an endless belt ELB facing the 1-star wheel 4 is attached to the bottle 2 as shown in FIG. It is also possible to forcibly rotate the bottle 2 by making contact with it.

In this way, the orientation of the bottle is changed by approximately 90 degrees, so the inspection range by the 2-in scanner 3A at the inspection position is the 19th
At inspection position B, the inspection range by the line scanner 3B is perpendicular to the inspection range by the three line scanners, although only the range shown in the hatched area in the figure can be inspected without creating a blind spot.

Compared to conventional devices that inspect only along the center line of the bottle while rotating the bottle, the device is more compact by changing the orientation of the bottle, and It can also be installed on bottle inspection equipment with a star wheel, making bottle handling extremely stable.
Compared to conventional inspections using rTV or solid surface sensors, the detection unit camera is cheaper and the memory for determining the inspection area is simplified.

In short, according to the present invention, in a bottle inspection device that detects the presence of defects or foreign matter by scanning the body of a glass bottle or the like in the direction of its center line using a line scanner, It has a simple structure and low cost because it includes a means for detecting a plurality of positions around the center line and a means for generating a predetermined effective scanning area signal corresponding to each of the plurality of positions. The present invention is extremely useful industrially because it provides a bottle inspection device that is easy to use and handle.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a known bottle inspection device, and Fig. 2 is a plan view showing a known bottle inspection device.
FIG. 3 is a side view of the bottle shown in FIG. 2, FIG. 4 is a diagram showing the amount of light of the light receiving element according to FIG. 2, and FIG. 5 is a plan view showing a known bottle inspection device. 6 is a partially enlarged vertical sectional view of FIG. 5, FIG. 7 is an enlarged side view of the bottle to be tested in FIG. 5, and FIGS. 8 and 9 are explanatory diagrams showing known bottle testing procedures, respectively. , FIG. 10 is a plan view of a known bottle testing device, and FIG. 11 is an explanatory diagram showing the testing area of the bottle to be tested in FIG. 10.
Fig. 12 is a plan view showing a known bottle inspection device, Fig. 13 is a plan view showing an embodiment of the present invention, Fig. 14 is an enlarged vertical sectional view of Fig. 13, and Fig. 15 is a plan view of Fig. 14. 16 is a partially enlarged side view showing the relationship between the field of view of the line scanner and the non-inspection zone of the bottle to be inspected; FIG. 16 is a partially enlarged half view showing the relationship between the field of view of the line scanner and the line scanner in FIG. Figure 18 is a waveform diagram showing the start pulse, clock pulse, and piteo signal, and Figure 19 shows the line scanner inspection range and the target object. 20- is a block diagram showing the signal processing device of Fig. 14, Fig. 21 is a waveform diagram of each part of Fig. 20, and Fig. 22 is a partial enlargement of Fig. 13. Fig. 23 is a partially enlarged view of Fig. 1114, Fig. 24 is a partial enlarged view of Fig. 1.
FIG. 4 is a plan view showing another bottle rotation means different from the push plate shown in FIG. 3; 1.-:ry hair, 2,2 t J B... test bottle, 3 mu, JB... line scanner, 4... star wheel, 5... diffuser plate, C... Light source, 7 rotation axis, 8°9... Bearing, 10.11... Timing belt, 12... Timing belt, 13.14
...Bearing, 15...Axle, 16...No9 Lux generator, 17...Press plate, 18...Signal processing device,
19...Trigger device, 100A, 100B...A
ND 4 circuits, 101, l01B...delay circuit, 1
021,102B... Frizzo 70 F/ff'
1 circuit, 103, 103B...AND 7 circuits, 1
04...Frigflo f F/F 1 circuit, 105
...AND2 circuit, 106...Furi, fF4y 7
'F/'F 3 circuits, 107...Encoder, 10
8...FRO'h/i,, 1091.109B...
Count comparison circle, 110, 110B...AND!
Circuit, 111 A * 11 J B...Foreign object discrimination circuit, 112...0. , R circuit, 113-9 sect circuit. Applicant Sub-Agent Patent Attorney Takehiko Suzue Figure 1
f'IS2 Figure 8 Figure 29 Figure 10 Figure 12 q 13r7I Figure 14 Figure 15 Figure 22 i"7J 24

Claims (1)

[Claims] In a bottle inspection device that uses a line scanner to scan the body of a glass bottle, etc. in the direction of its center line, the presence of defects or foreign matter is detected at multiple positions around the center line of the bottle to be inspected. and a means for detecting an effective scanning area 'predetermined in advance corresponding to each of the plurality of positions.
A bottle inspection device comprising: means for generating a signal.