JPS6355351B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for acoustically detecting the presence or absence of shallow flaw lines cut into the neck of an ampoule.

Recently, samples have been used in which a shallow flaw line is cut into the neck of the ampoule, making it possible to cut the branch pipe without using a cutting stone. This ampoule includes an ampoule with a New Ease, in which a shallow flaw line is cut all around the neck and an easy liquid is applied, and an extremely short and shallow flaw line is cut in the neck area, and a mark is placed on the bead immediately above the flaw line. There is a one-point ampoule with a mark on it. In each ampoule, it is necessary to check whether or not the flaw line has been cut, and this can be detected by photoelectrically detecting the rise and fall of the cutter, or by probing the flaw line with a fine needle tip and using a sensor to detect the presence or absence of the flaw line. There are ways to do this. However, with the former, for some reason the cutter does not touch the neck of the ampoule, it is judged as being good, and with the latter, the flaw line is extremely short and shallow, resulting in low accuracy. Another possibility is to use a microphone to directly capture the cutting sound when the cutter cuts the flaw line, but this method is not suitable as a method for detecting flaw lines because the weak cutting sound is enveloped by surrounding noise. It is.

The present invention utilizes the fact that when a disc-shaped cutter is rotated and brought into contact with the neck of a semi-finished ampoule product, the cutting sound resonates and a resonance sound is generated in the body, which is synchronized with the contact of the cutter. Then, a microphone is applied to the body of the ampoule semi-finished product, and the resonance sound of the body is captured by the microphone to acoustically detect the presence or absence of flaws regardless of surrounding noise. They succeeded in reliably and automatically detecting shallow flaw lines.

In the embodiment shown in the drawings, 1 is a semi-finished ampoule product, in which a body 2 of two ampoules has elongated branch pipes 3, 3 connected to both ends, and a neck 4 is provided by constricting the base of the branch pipe. . This ampoule semi-finished product is in the flawing process of the ampoule manufacturing machine, and the branch pipes 3, 3 cut to a certain length in the previous process are supplied and sent to the next body cutting process to form the finished ampoule. The flaw line process is equipped with a conveyor in which a large number of caterpillars each having a U-shaped cross section are mounted adjacent to each other, and semi-finished ampoules are placed one by one in the caterpillars, and the conveyor is moved intermittently. Reference numerals 5 and 15 indicate thin disk-shaped cutters, which are placed directly below the necks 4, 4 of several semi-finished ampoule products at different intervals in the direction of movement on the front side and the opposite side of the conveyor, and are swung at appropriate times. It is attached to a small motor 6, 16 and rotated constantly, and as the motor rises, it lightly contacts the neck 4 from below to cut an extremely short and shallow flaw line.

Reference numerals 7 and 17 denote two microphones, which contact the body 2 of the ampoule semi-finished product in synchronization with the contact of the cutters 5 and 15, respectively, and capture the resonance sound generated in the body by resonating with the cutting sound of the cutter. Cams 8 and 18 swing the motors 6 and 16, respectively, and serve as a source of motion for moving the cutters 5 and 15 toward and away from the neck 4, and when the cutters come into contact, switches 9 and 19 send cutting signals. Reference numeral 10 denotes a relay box provided between the microphones 7, 17 and the control box 20, and signals from the microphones are sent to the control box 20 via this relay box. The control box 20 includes filters 21 and 31, comparators 22 and 32, shapers 23 and 33, and amplifier 2 for each microphone.
4, 34, integrator 25, 35 and determiner 26, 3
6 are connected in series, and the cutting signals coming from switches 9 and 19 are applied to integrators 25 and 35. Note that the shapers 23 and 33 are retrigger type monostable multivibrators.

An embodiment of the flaw line detection method according to the present invention will be specifically described as follows.

When the ampoule manufacturing machine operates, the ampoule semi-finished product obtained by cutting the branch pipes 3 and 3 into a certain length is supplied from the previous process to the scoring process, and the motors 6 and 16 in the scoring process are energized to drive the cutters 5 and 15. The conveyor is constantly rotating, and the conveyor feeds semi-finished ampoules one by one onto the caterpillar and moves intermittently. While the conveyor is temporarily stopped, the cutter 5 is brought into light contact with the neck 4 on the front side of the ampoule semi-finished product by the cam 8 to cut an extremely shallow and short flaw line, and the sound collecting microphone 7 is synchronized with the contact of the cutter. comes into contact with the front side of the body 2 and captures the resonance generated in the body due to the cutting sound of the cutter. The cutter 5 and microphone 7 immediately separate from the neck 4 and body 2, and when the ampoule semi-finished product moves several lengths and stops as the conveyor moves intermittently,
The cutter 15 on the other side lightly contacts the neck with the cam 18 and cuts an extremely short and shallow flaw line,
In synchronization with this, the microphone 17 comes into contact with the torso and captures the resonance sound, and the cutter 15 and the microphone 17 immediately separate from the neck 4 and the torso 2.

The signals from the microphones 7 and 17 enter the control box 20 via the relay box 10, and the control box passes this signal to the filter 2.
1 and 31 to extract only the effective components, which are input to comparators 22 and 32, and if the value exceeds the set value, it is recognized as a signal. The single outputs of the comparators 22 and 32 enter the shapers 23 and 33 and are shaped into pulses of a predetermined width, amplified by the amplifiers 24 and 34, and then applied to the integrators 25 and 35. Integrator is shaper 2
Since the pulse train coming from switches 3 and 33 is time-integrated, proportionality to the number of pulses can be obtained, and the cutting signals coming from switches 9 and 19 are also added to this integrator. Since the shapers 23 and 33 are retrigger type monostable multivibrators, the microphone 17 captures excessive resonance sound, and the saturated signal is transmitted to the filter 2.
Even if it passes through 1 and 31 and enters the comparators 22 and 32,
The responses of the shapers 23, 33 are output only once and therefore do not affect the time integration of the integrators 25, 35.
Next, the determiners 26 and 36 determine whether the outputs of the integrators 25 and 35 have exceeded the set value, that is, whether the valid signal has continued for a predetermined period of time, and send out a good signal and a bad signal, and the good signal is sent to the counter. Good products are counted, and a defective signal is sent to a storage device (not shown). When the defective products reach the end of the conveyor, the connecting plate (not shown) to the next process is opened, and the defective ampoule semi-finished products are transferred to a storage box (not shown). (not shown) and removed from the ampoule making machine.

The above describes one embodiment of the present invention.
The present invention is not limited to this embodiment, but can be modified within the spirit of the invention. For example, the present invention can be used as is in an ampoule with a new easer, in which a cutter is brought into contact with the neck of a semi-finished ampoule product while rotating it, and a shallow flaw line is cut all around the neck and the easer is applied. It can also be applied to processed glass tube products. Further, in this embodiment, a mark is provided on the bead immediately above the flaw line, but this is omitted because it is not related to the present invention.

In the present invention, when a flaw wire is cut into the neck of a semi-finished ampoule with a disc-shaped rotary cutter, the cutting sound resonates and a resonance sound is generated in the body, which is synchronized with the contact of the cutter. Since a microphone is placed on the body of the ampoule semi-finished product, the resonance sound of the body can be captured by the microphone and the presence or absence of flaws can be acoustically detected regardless of surrounding noise. It becomes possible to reliably and automatically detect shallow flaw lines to be cut, and has the effect of completely eliminating errors in the mixing of defective products in the manufacturing process of one-point ampoules and ampoules with New Easy.

[Brief explanation of drawings]

The drawing is a system diagram of a flaw line process and a control circuit showing one embodiment of the method of the present invention. Note that 1 is the ampoule semi-finished product, 4 is the neck, 5 and 15
is a cutter, 7 and 17 are microphones, and 26 and 36 are judgers.

Claims (1)

[Claims] 1 A disc-shaped rotary cutter is brought into contact with the neck of the ampoule semi-finished product to cut the flaw line, and in synchronization with the contact of the cutter, a microphone is applied to the body of the ampoule semi-finished product, and the body resonates with the cutting sound of the cutter. 1. A method for detecting flaws in an ampoule, characterized by capturing resonance sound generated in the ampoule with a microphone, determining the signal thereof, and transmitting a defective signal if the resonance sound is below a predetermined level.