JPH01110221A - Inspecting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a container and an inspection device for inspecting the amount of liquid cosmetics, food, medicine, etc. contained in the container.

[Conventional technology]

In general, liquid cosmetics, foods, drugs, etc. are stored in containers and subjected to μI 澹kejj<-, and only good products are sent to stores and sold on the market. There is an apparatus shown in FIG. 10 that performs such an inspection. That is, in the figure, 1 is a speaker with a sensor, and 2 is a resonant circuit including a negative resistance oscillation circuit connected to the speaker 1. This resonant circuit 2 is designed to resonate in tune with the resonant frequency detected by the sensor of the speaker 1. Reference numeral 3 denotes a liquid level testing device 6 connected to the resonant circuit 2, which includes a kakanta, a latch circuit, a calculation section, and the like.

In this configuration, a container 5 containing liquid 4 is placed on a support base 6, and the speaker 1 is attached to the upper opening of the container 5 with the speaker 1 facing into the container 5.

Then, a tone is sent from the speaker 1 into the container 5.

As a result, vibration occurs in the space 7 of the container 5, and this vibration is sent to the liquid level testing device 3 via the resonance circuit 2 as the resonance frequency of the speaker 1. Then, the counter, latch circuit, etc. of the liquid level inspection device 3 count the resonance frequency as the number of pulses output every time, and this number of pulses is converted into the volume of the space 7 of the container 5 in the calculation section. . That is, this device uses the phenomenon that the resonant frequency of the speaker 1 varies depending on the volume of the space 7 in the container 5, and detects the volume of the space 7 in the container 5.
The method is to detect the amount of liquid inside.

[Problem that the invention seeks to solve]

However, the above-mentioned apparatus has a problem in that it can only inspect the amount of liquid and cannot detect defects such as poor viscosity of the liquid, cracks in the container, and mixing of containers made of different materials. In addition, there is the problem that a sound device such as a speaker is required and is expensive, and since the inspection is performed with the speaker in contact with the opening of the container, accurate positioning is required, making adjustments when changing types. In addition to being complicated, there is also the problem that contact of the speaker with the opening of the container is unfavorable from a sanitary standpoint. Furthermore, since the inspection is carried out with the container open, there is a problem in that when a defective product is removed, the container tends to topple over and the liquid inside is likely to be washed away.

This invention was developed in view of the above circumstances, and is capable of detecting defects such as poor viscosity of liquid, cracks in containers, and mixing of containers made of different materials in addition to testing the amount of liquid. To provide an inspection device that does not require a sounding device, can be easily adjusted when switching types, and can perform inspection even after a lid is fastened.

[Means for solving problems]

In order to achieve the above object, the inspection device of the present invention is a device for inspecting a container and the amount of liquid contained in the container, and includes a striking means for striking the container;
a receiving means for receiving a sound generated when the striking means hits the container; a first storage means for storing the sound received by the receiving means as a received waveform pattern; and a standard container filled with a reference liquid. a second storage means for storing the received waveform pattern of the percussion sound; and a pass/fail determining section that compares the received waveform patterns stored in both of the storage means and determines whether the received waveform pattern is good or bad. The structure is such that the results are inspected for quality.

[Effect]

In other words, this inspection device uses the phenomenon that the resonant frequency of the speaker changes depending on the volume of the space inside the container to detect the liquid in the container by detecting the volume of the space inside the container. It is not about detecting the amount, but
The side of the container is struck using a striking means, and the volume of the liquid contained in the container and the liquid contained therein is inspected from the waveform pattern of the sound generated at that time. In addition to inspection, it can also detect defects such as the viscosity of the liquid, the mixing of different types of containers into the container being inspected, and cracks in the container.In addition, there is no need for a sound device such as a speaker, and this speaker can be used at the opening of the container. Since there is no need to accurately align the position of the speaker, even if the shape of the container changes, there is no need to adjust the position of the speaker, etc., and it is possible to easily switch to any container and inspect it.Furthermore, It is good for quality control as it can be inspected even with the lid open.
Furthermore, there is no risk of liquid flowing away when rejecting defective products.

Next, the present invention will be explained in detail based on examples.

〔Example〕

FIG. 1 shows an embodiment of the inspection apparatus of the present invention.

In the figure, 11 is a belt conveyor for conveyance provided on a base (not shown), and 12 is a ball made of hard rubber placed above the belt conveyor 11. This batted ball 12 is fixed to one end 13a of a rod 13, and the other end 13b of this rod 13 is attached to a shaft 14 fixed above the belt conveyor 11 so as to be rotatable about this shaft 14. ing. Thereby, the hit ball 12 is in a state where it can freely rotate about the shaft 14 together with the rod 13. A cam 15 is rotatably attached to a shaft 16 provided above the shaft 14, and is rotated in the direction of the arrow shown in the figure when driven by a motor (not shown). The tip 15a of this cam 15 is connected to the other end 13 of the rod 13.
It is provided at a position where it can come into contact with b. Therefore, when the cam 15 rotates, its tip 15a presses the other end 13b of the rod 13 in the rotational direction, pushing up the batted ball 12 on the one end 13a side to the chain line position shown in the figure, and then, at that position, the cam 15 The tip 15a releases the other end 13b of the rod 13, allowing the batted ball 12 to fall freely. 17 is a container arrival sensor (using a known transmission type photoelectric sensor, etc.) installed on the side of the belt conveyor 11, and the container 19 containing the liquid 18 is conveyed below the shaft 14 by the belt conveyor 11. It is attached at a position where the end on the conveying side can be detected when the conveyance side end is detected. This container arrival sensor 17 is connected to the wiring 20
Accordingly, the signal input section 22 built in the control device 21
, and when the arrival of the container 19 is detected, the arrival signal is output to the signal input section 22 .

Reference numeral 23 denotes a striking command output section connected to the motor of the cam 15 by a wiring 24. When the arrival signal of the container arrival sensor 17 is received by the signal input section 22, the signal is outputted from the signal input section 22, and this signal is outputted from the signal input section 22. The motor is driven by the signal. The cam 15 is rotated by the drive of this motor, causing the batted ball 12 to fall downward from the position shown by the chain line and strike the side surface of the container 19. Note that this batted ball 12 is
Normally, the bar 13 is stopped at the chain line position shown in the figure by pressing the other end 13b of the bar 13 by the cam 15, and the bar 13 is released by the rotation of the cam 15 and falls freely from that position, and the container 19 is After striking, the cam 15 quickly rotates once and presses the other end 13b of the rod 13 again, thereby stopping at the position shown in chain lines, thereby preventing the container 19 from being struck twice. 25 is a microphone provided on the front side (container transport side) of the shaft 14, and the amplifier 2
6. It is connected to the signal input section 22 by a wiring 28 via an A/D converter 27 . This microphone 25 is the batted ball 12
The emitted sound when the object collides with the container 19 is captured, the emitted sound is amplified by the amplifier 26, and then an A/D converter (analog-
A digital converter) 27 converts the signal into a digital signal and outputs it to the signal input section 22. Signal input section 22
In addition to the above, the reference input designation switch 29 is connected to the wiring 30.
connected by. This reference input designation switch 29
is activated when creating a standard waveform pattern for inspection. With this turned on, a standard container 19 containing a specified amount of liquid 18 with a specified viscosity is transferred to the belt conveyor 1.
By driving the ball 12 over the container 19, the container arrival sensor 17 and the motor are activated, and the ball 12 collides with the container 19. At that time, the signal input section 22 uses the dial tone as a data signal.
It is now possible to input Note that when inspecting a container 19 for normal inspection, turn off this reference input designation switch 29 and
is conveyed on the belt conveyor 11. Reference numeral 31 denotes a storage section, which stores the data signal of the waveform pattern sent via the signal input section 22. 32 is a pass/fail judgment section;
The reference waveform pattern stored in the storage unit 31 is compared with the waveform pattern based on the inspection data of the container 19 to be inspected, and its quality is determined. 33 is a defective product alarm output section connected to the alarm 35 by wiring 34, and is used for pass/fail judgment/
If the determination by the section 32 is negative, an alarm 35 is activated.

In this configuration, the inspection proceeds in the order of the flowcharts shown in FIGS. 2 and 3. That is, first,
As shown in FIG. 2, the reference input designation switch 29 is turned on to input to the signal input section 22 that the test to be performed is in the reference waveform pattern teaching mode. In this state, a standard non-defective container 19 filled with a specified amount of liquid 18 having a specified viscosity is placed on the belt conveyor 11 and conveyed to below the shaft 14. As a result, the container arrival sensor 17
detects this container 19, and at the same time, the motor is activated, the cam 15 rotates, and the ball 12 hits the side of the container 19.

Then, the sound produced by the impact is input as reference data to the storage section 31 via the signal input section 22 and stored therein.

Next, turn off the reference input designation switch 29,
The container to be inspected shown in FIG. 3 is inspected. That is, the containers 19 to be inspected are placed on the belt compare 1 at regular intervals.
1 and conveyed to below the shaft 14. At this time, container 1
9, as shown in Fig. 4, the belt conveyor 1 is empty.
1, and the liquid 18 is placed on this belt conveyor 11.
After the container is filled with water and then the lid is tightened, it reaches the bottom of the shaft 14. When the container 19 reaches below the shaft 14,
Similarly to the above, the container arrival sensor 17 detects this, the cam 15 starts rotating, and the batted ball 12 falls. At that time,
The sound produced by the impact of the ball 12 and the container 19 is sent as data to the storage section 31 via the signal input section 22. Then, the quality determining section 32 determines the quality of this data. This pass/fail judgment is performed by scanning the vibration waveform at high speed (10 μsec).
~100μsec), and the entire waveform (
Attenuates at approximately 160m5ec.

This is done by comparing the waveform patterns such as the frequency and attenuation state of the above-mentioned beeps. That is, when a standard waveform pattern of a sound produced when a standard non-defective container (made of glass) 19 filled with a liquid 18 of a specified amount and viscosity is struck appears as shown in FIG. 5 (frequency f + -2 ,5KHz, time constant T,
= 60m5ec, converges to zero in 160m5ec)
As shown in FIG. 6, the beeping sound from the container 19 with insufficient liquid volume is attenuated in the same manner as in FIG. 5 and has a large frequency (frequency f2-1).
~3f+) waveform pattern, and the emitted sound of the container 19 when the viscosity of the liquid 18 is too large is as shown in FIG. 7, the frequency is the same as that in FIG. 5, but the vibration energy is
The waveform pattern has a fast amplitude attenuation (the time constant is short; time constant TZ=115T, approximately).

In addition, if a resin container is mixed in with the standard container 19, the beep sound when the resin container is hit will be the 8th one.
As shown in the figure, the frequency is extremely small (frequency f 3 =
(approximately 1710 f+) becomes a wave pattern, and the container 19
If cracks have occurred in the waveform pattern, distortion will appear in the waveform pattern, as shown in FIG. Therefore, this device compares the waveform patterns of the tones of the container 19 to be inspected and the tones of the reference container 19, and if they match, the next container 19 to be transported is inspected. , the defective product alarm output section 33 activates the alarm 35. When the alarm 35 is activated, the defective container 19 is transferred to the belt conveyor 11.
Remove from above and separate from good products.

In this way, this inspection device transports the container 19 on the belt conveyor 11, hits the side surface of the container 19 with the batted ball 12, and compares the waveform pattern of the emitted sound with the reference pattern, thereby inspecting the container 19 and the container 19. The liquid 18 contained therein is inspected. Therefore, it is possible to detect not only the amount of liquid, but also the viscosity of the liquid 18, the presence of different types of containers, cracks in the container, and the like. And, like the conventional example,
Since the hitting ball 12 is used without the need for a sound generating device such as a speaker, it is inexpensive, and its position can be easily adjusted, making it easy to change the type of container to be inspected.

Furthermore, since the inspection can be performed after the lid is tightened, it is sanitary and favorable for quality control, and the risk of the liquid 18 being washed away when rejecting defective products can be avoided.

In the above embodiment, the container 19 is hit with the batted ball 12, but the invention is not limited to this, and the container 19 may be hit with a non-contact hit using ultrasonic waves, air pulses, or the like. In addition, a pusher or the like for rejecting defective products is connected to the defective product alarm output section 33, and this pusher is linked to the operation of the defective product alarm output section 33, so that the defective containers 19 on the belt conveyor 11 can be removed to the outside. You may also do so.

〔Effect of the invention〕

Since the inspection device of the present invention is configured as described above, it can not only inspect the amount of liquid but also detect poor viscosity of the liquid.

It is possible to detect defects such as cracks in containers and mixing of containers made of different materials, and there is no need for a sound device such as a speaker, making it easy to make adjustments when changing types.Furthermore, inspection can be performed even after the lid has been tightened, making it hygienic. This is preferable from a quality control perspective.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIGS. 2 and 3 are flowcharts showing the inspection order, FIG. 4 is an explanatory diagram explaining the process, and FIG. 5 is a waveform reference pattern. FIGS. 6, 7, 8, and 9 are curve diagrams showing waveform defect patterns, and FIG. 10 is an explanatory diagram of a conventional example.

Claims (1)

[Claims] (1) A device for inspecting a container and the amount of liquid contained in the container, which includes a striking means for striking the container and receiving a beep when the striking means strikes the container. a first storage means for storing the tone received by the receiving means as a received waveform pattern;
a second storage means for storing a received waveform pattern of a percussion sound of a standard container filled with a reference liquid; and a quality determination section for comparing the received waveform patterns stored in both of the storage means and determining quality. An inspection device characterized in that the quality is inspected based on the determination result of the quality determination section.