JPS60100705A - Inspection head for glue or the like - Google Patents

Abstract

PURPOSE:To detect the amount of glue accurately by scanning a dextrin sticking part at a high frequency which attenuates by the presence of dextrin, and detecting the amount of sticking on the basis of the obtained signal. CONSTITUTION:Plural transmitting electrode plates 15-18 and receiving electrode plates 24-27 are arranged almost at right angles of the moving direction 6 of a carton. Inspection signals corresponding to the amount of attenuation of high frequencies in plural sections 35-38 are obtained by those transmitting electrode plates, receiving electrode plates, and associative electronic switches 44 and 45. The amount of glue is detected on the basis of the differences of signal parts of the obtained inspection signals corresponding to the sections 35-38. The set value of a dextrin counter is set on the basis of the speed signal of the carton from a rotary encoder 62 in proportion to it when the speed is fast or set large when slow, so that the sticking length of the glue is judged accurately even when the moving speed of the carton varies.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inspection head in a device for detecting the amount of glue adhered, etc., and the present invention relates to an inspection head in a device for detecting the amount of glue adhered, etc. This relates to an inspection head used for inspecting adhesive coloring, etc.

During the box manufacturing process, etc., the carton may be glued with adhesive glue or a glue adhesion roller (= I), or this glue often breaks, shifts, or sticks too much. However, in order to prevent such defective box manufacturing, a device has been developed that detects the amount of glue that has been applied and inspects the quality of the amount of glue that has been applied. Ta.

For example, there is a photoelectric inspection device that mixes colored dye into the mesh to facilitate optical inspection and optically inspects the reflected light of a glued carton.

However, this photoelectric method not only requires mixing dye with the glue, but also causes many malfunctions due to carton flapping, etc., and is not a practical device.

As another inspection method, there is an electrostatic inspection device in which the carton is passed between electrode plates that detect each electrostatic image, and the glue attached to the carton is detected by capacitance.

However, such capacitance-based inspections are not only unable to detect glue holes with high precision, but are also susceptible to external influences, such as malfunctions due to 1 tia degree changes or malfunctions due to fluctuations in the carton. Moreover, if starch powder accumulates inside the inspection head, the capacitance changes and malfunctions occur, so the inside of the head must be constantly erased, making maintenance troublesome.

The present invention was developed in order to eliminate the above-mentioned drawbacks of the conventional glue adhesion inspection device, and the present invention scans the glue-like part with a high frequency that is attenuated by the presence of glue, and uses the obtained l-signal. By detecting glue adhesion h), the above-mentioned drawbacks of the conventional glue hanging inspection device are solved.

The present invention will be explained in detail with reference to one example below.

The adhesive stone detection device of the embodiment of the present invention was used for the 6m inspection of the carton in the box manufacturing process as described above, but it photoelectrically detects the presence of cartons. Mechanisms for determining whether adhesion is defective based on each detected adhesive adhesion are well known in the prior art, so the explanation of these mechanisms will be simplified and will not be explained here. Detection of amount of wear will be explained in detail.

As shown in Figures 1 and 2, each inspection head (10
) is equipped with two opposing boards <12) and <13>, and four transmitting electrode plates (15) are placed on the inner surface of the upper M board (12).
<16>(17)(18) are provided at equal intervals in - columns. The direction of the rows of the transmitting electrode plates (15, 16, 17, and 18) is perpendicular to the direction of movement of the glue (4) placed on the carton (2) (6). Upper WIM (1
2) The above transmitter electrode plates (15) (16) (17) are on the upper side.
) (18) are provided with regulators (20), (21), (22), and (23) for individually adjusting the amount of high frequency to be supplied to the antennas.

The lower base! (13) includes the transmitting electrode plates (15) and (16).
(17) Receiving plate (2) that receives the high frequency from (18)
Four pins (25), (26), and (27) are provided facing the transmitting electrode plates (15), (16), (17), and (18), respectively.

The spacing (
33) is sufficiently wide compared to the width of the glue (/4) applied to the carton, and is 6 cm in this example.

Further, a light emitting element (3o) is provided on the upper substrate (12), and this light emitting element (30) is provided on the lower substrate (13).
A light-receiving element (31) is provided to receive light from the carton (2), and these elements <30) (31) determine the presence or absence (object present or absent) of the carton (2) in the inspection head (1o). Detect.

A transmitter (4o) that supplies high frequency waves to the optical signal plates (15), (16), (17), and (18) is equipped with an oscillator that generates high frequencies. The high frequency generated by this oscillator is transmitted to each transmitter plate (15) (16) (17) (
18) (see Figure 3).

The frequency of the high frequency generated by the transmitter (40) is the same as that of the glue (4).
A high frequency wave with a frequency that is well attenuated due to the presence of is used, approximately 10KH2 to 1oooKHz, but if a low frequency high frequency is used, the sensitivity will be low, and if a high frequency high frequency is used, the amplification factor will be low, etc., making it difficult to handle.
Therefore, it is preferable to use a high frequency of about 500 KHz, and the apparatus of this embodiment also uses a high frequency of about 500 KHz.

The next electronic switch (44) consists of a multiplexer. This electronic switch (44) is interlocked with an electronic switch (45). 1K by electronic switch (44)
Multiple transmitter plates (15) (16) with a period of Hz
(17) and (18) are sequentially applied at equal intervals (not 15 in this example) → (16) → (17) → <18) → (15
)→(16)→(17)→(18)・・・・・・・・・
) supply. In other words, the transmitting electrode plate (15) → (16) → (17) → (18) → (15) → every 250μSec
High frequency is supplied to (16)→(17)→(18)... The high-frequency output generated by the transmitter (40) is input to the inspection head (10) and sent to the transmitter plate (15) ( 16) (17) (18), and from this transmitting type plate (1ri> (16) (17) (18), the high frequency is transmitted to the receiving plate (24) (25) (26n <27)
sent in the direction.

Then, by the action of the electronic switch (45), the signals are received by the receiving plates (24) (25>(26) (27)) corresponding to the respective transmitting plates (15), (16), (17), and (18). .

The high frequencies received by the receiving plates (24), (25), (26), and (27) are sent to amplifiers (46), (47), and (4, 8), respectively.
i, 9) and sent to the receiving section (50). A level adjustment signal from the regulator (52) is input to the receiver (50) (by adjusting the regulator (52), the output level is adjusted to a preferable range according to the input level). be done.

The receiving section (50) consists of a kind of detection circuit 6.H, and the human input signal is detected by this receiving section (50) to remove high frequency components, and as shown in FIG. An output signal as shown in B is obtained.

The signal portion (P) in FIG. 4 is the signal portion transmitted from the transmitting electrode plate (15) and received by the corresponding receiving electrode plate (24), and the signal portion (Q) is the signal portion transmitted from the transmitting electrode plate (15). 16)
The signal part (R) is transmitted from the transmitting plate (25) and received by the corresponding receiving plate (25).
17), and the corresponding receiving electrode plate (26
) was received at (S), and the signal portion (S) is the signal portion transmitted from the transmitter plate (18) and received by the corresponding receiver plate (27). The value of the signal part (1) approximately corresponds to the glue amount in the section (35) within the scanning interval (33) in the inspection head, and similarly the value of the signal part (1)
The value of Q) approximately corresponds to the glue amount in section (36) within scanning interval (33), and the value of section No. 48 (R) corresponds to the amount of glue in section (36) within scanning interval (33).
3), and the value of the signal portion (S) approximately corresponds to the glue amount in the interval (38) within the scanning interval (33).

Then, in the state without carton (2) in advance, 6 m
(20n (21n) (22n 〈 23n)
By adjusting each transmitter plate (15) (16) (1
7) Adjust the transmission level from (18), and as a result, each signal portion (P) (Q) l) (S) of the output signal of the receiving section (50) is at a constant level as shown in FIG. 4A. (horizontal).

Here, when carton (2) passes, cars 1 to 2 (2)
1 board (15) (16) due to glue (4) attached to
(17) (18) to receiving plate (24) (2!:))(
26) The high frequency is attenuated while being transmitted to (27>), and the result is Fig. 4B
As shown in the figure, the output signal changes.

The high part of the signal 1 + cf corresponds to the part with large attenuation and a lot of glue, and conversely, the low part of the signal (ifi (,1
If you change the phrase with less sadness, it corresponds to the part where there is less glue.

In the figure, it will be understood that the signal portion (R) has the highest attenuation, and the signal portion <1)) has not been attenuated much. Each signal part (+)) ((1)>(R)(S)
Nominally, each signal portion (P) (Q
' ) (R) (S) The glue full is detected based on the difference.

That is, the glue is applied to the carton (2) by a roller (
The width of the glue (=J is determined by the width of the reroller and cannot be wider than that.) The width of the glue (=1
The attached carton is scanned with high frequency, and the obtained detection (No. 8 shows that there is a difference in the amount of attenuation due to the glue in each signal part, and the signal part (R) corresponding to the glued part becomes higher, indicating that the glue is The signal portion (P) corresponding to the portion away from the attached portion becomes lower, and a large difference occurs. Based on this difference, by detecting the amount of glue (
Since the q arrival fif is detected, a positive value can be detected.

There are various methods for detecting the amount of glue based on such a difference. For example, as in the example in (after) E, the difference from the adjacent signal portion is calculated by 61, and the difference is calculated. May be added. Alternatively, the highest signal portion and the lowest signal portion may be detected, and the lowest signal portion may be subtracted from the highest signal portion. Furthermore, detection may be performed by detecting the lowest signal portion, subtracting the lowest signal portion from other signal portions, and adding the differences. In d3 of the present invention, the calculation method for detecting the amount of glue is not particularly limited.

The test signal obtained in this manner is outputted from the receiving section (50) and inputted via the inter 71 chair (54) to the arithmetic and determining section (58) consisting of a microcomputer. The output signal from the tally encoder 62 and the signal to set the inspection conditions from the operation panel (56) are sent to the inter 71 chair (54). are also input, and both are input to the performance y determination section (5
8) is manually powered. This calculation/judgment section (5B) calculates the value of the adhesive from A to No. ω, and checks whether the obtained A-coating Lr1 is within a set range, and if it is determined that the adhesive is defective. If the output is NG, the NG output (HQ is sent to the NGG power section (60), and this NG output is converted into an AC of i oov), which will sound the buzzer or stop the bean paste making machine. Tari Juru.

Flow steps A7-1 to A7-1 of the calculation/judgment section (58) will be explained below.

As shown in FIG. 5, the program starts at START (70), and the glue counter is set to O at Glue Counter 0 Z1 to (72). Next, the aforementioned photoden cable (30) (3
Based on the signal from 1), if there is an object (74), the process proceeds to the next four pieces of received data (76), and the 1st part (P'>(Q")(R')< S ' ) 4 A6 value data are imported.If there is no object, there is an object (7
Return to 4).

Here, the signal portions (P') (Q') (R'
)(S') as ASB, ,C,D,
Toriru.

In the next difference calculation (78), calculate A-B, B-C, CD, and in the next absolute value calculation (80), IA-Bl=a,
Perform the calculations IB-CI=b, Ic-DI=c, and perform the next addition operation (82)-Qa plus ten a=7 (j Now. This king value is input into the car). ” corresponds to the amount of glue applied.

Next, the total value T>set value (84)] is displayed on the operation panel (56
) to determine whether the value is greater than or equal to the set value, and if the value is greater than the set value, the glue counter is incremented by 1 with Glue Counter +1 (86). If the king is below the set value, read the received data 4
(76), and the signal part which is the next four data <
1 - Take in the value of I'><o'>(R',)(S').

After incrementing the glue counter by 1 at Glue Counter +1 (86), the process proceeds to 88) if there is no object, and the process proceeds to 4 pieces of received data read (76) for the platform with object. In this way, things disappear J
(31) C) Sudep (76) ~ (
88) is repeated, and if the amount of glue exceeds the set value through such repetition, the glue counter advances by 1, and if it is less than the set value, it does not advance.

If there is no item (88), that is, one carton has passed and the glue count advances to the set value or more (90), and the operation panel (b6) ``e is set.'' If it is more than the set value, the condition of the glue is good and goes to the glue counter O set (72).If it is more than the set value (=J is defective and NG output): + (927) After sending NG (n Q) to the NGG force section (60), return to the glue counter O set (72).

In this way, after returning to the glue counter O z (72), hold it until the item is found stolen (74) (until the next carn enters the inspection head (10)/\), Thereafter, the same operation is repeated, and the four feet of the glue are tested.

The inspection means have been described above in simplified form LF1. The above inspection
J, determine whether the total amount of glue is equal to or greater than the set value compared with the set value (84), and determine whether or not the glue is attached to the total value
It is judged whether the glue counter is longer than the set value (90) and the part that was marked is longer than the set value (length). If it is above the set value, it is considered to be a good product, and if it is below the set value, it is considered to be a defective product. This produces an NG output.

Note that the actual device is further configured as follows. If the glue counter is cloudy with the car 1-n speed signal from the setting value (90) or higher (directly, rotary 1 encoder 62), and it is fast, it will be proportionally less, and if it is close, it will be too much. The length of the glue can be determined accurately even if the moving speed of the curl changes.
, sea urchin (there is).

Although one embodiment of the present invention has been described in detail above, it goes without saying that the scope of the present invention is limited to the embodiment described above.

The main point of the present invention is that a plurality of transmission seed plates (15) (16
)(17)(18) and receiving plate (24)(25>(2
Place 6>(27>!
) (16) (17) (18), receiving electrode plate (24>(25
) (26) (27) and interlocking electronic switch (44)
Multiple sections (35) (36) (37) due to (4,5)
(38) It is possible to reduce the test signal corresponding to the amount of high frequency attenuation.
5) It is possible to detect the amount of glue based on the difference in the values of the other parts corresponding to (36), (37), and (38). Therefore, when detecting the amount of filI based on this difference, 1
Various methods such as those described above can be adopted and are optional.Also, in the above embodiment, a digital computer was used to detect the amount of glue, but an analog computer may be used to perform the calculation.
You may. Although the above embodiment describes the inspection of glue 1Y that has arrived on a carton, the scope of application of the present invention is not limited to this, for example, the detection of HL of a conductive object on an insulating conveyor. , detecting the amount of conductive material flowing through an insulating duplex (anything can be used).

Since the present invention is based on the above innovations, it also has excellent practical effects as described below.

In other words, in the conventional photoelectric inspection method, not only did it require mixing the dye with the glue, but there were also many malfunctions due to the flapping of the carton.

In addition, with the conventional capacitance method test, not only is it not possible to detect the amount of glue using 8 pieces of melon, but it also malfunctions due to changes in humidity, and malfunctions due to the flapping of the carton, resulting in external problems. If dirt or dust accumulates in the inspection unit, malfunctions may occur, and the inside of the head must be constantly cleaned, making maintenance difficult.

However, the present invention can eliminate all of the above-mentioned drawbacks of the prior art, and can accurately detect the glue m even if the carton flaps or the humidity changes, and in particular can detect high-frequency signals in multiple sections. Since the glue h1 can be detected from the difference in attenuation, the glue ω can be detected accurately, making stable inspection possible without causing malfunctions. Also, the high-frequency energy dries quickly, and this dried glue no longer causes high-frequency attenuation, so the long poem 'C+A!
There is no need for removal, so maintenance is extremely easy.

Furthermore, in any of the conventional methods, the amount of glue cannot be accurately detected unless the distance between the boards passing through the inspection head is narrow, and malfunctions occur due to external shadows. Therefore, C conventional technology could not obtain more than approximately 15n1m, but with the present invention, approximately 30 +nmJy1
However, practical tests are still possible.

Furthermore, the present invention is not limited to simply detecting glue m, but also to the spacing between each weighing object that causes high frequency attenuation.
Therefore, it has extremely excellent practical effects, such as being applicable to various inspection devices.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view of the inspection head, FIG. 2 is a side view of the same, and FIG. 3 is a diagram of the inspection head.
A block diagram of the device, FIG. 4 is a diagram of the inspection signal, where ENTER indicates a state where there is no item, B indicates a state where a carton with glue is inserted, and FIG. 5 shows a calculation/judgment unit. The flowchart is shown below. (2) Carton (4) Glue (6) Movement direction (10) Inspection head (12>(13)) ...Base (15) (16) (17) (18) ... Transmission plate <20> (21) (22> (23) ... Adjuster <24) ( 25)<26n (27)...Receiving plate (30)...Light emitting element (31)...Light receiving element (33)...Scanning interval <35) (36) (37) (38)・・・1 listen (
40)...Transmission unit <44. )<4.5)...Electronic switch (46
) (47) (48) (49)...Amplifier (50
)...Receiving section (52)...iI? 1 section (5/1.)...Interface (56)
...Operation panel (58) ...Calculation judgment section (60) ...NG output section (62) ...Rotary engine
(Q) (R) (S) ・・・・・・・・・Ini Shimishi Part Patent Applicant Toppan Printing Co., Ltd. Representative Ministry Suzuki Waken Co., Ltd. Representative Decnos Yamada Rokube

Claims (1)

[Claims] 1) A plurality of transmitting electrode plates are installed on one base ΩK of the inspection head, and the row direction of the transmitting electrode plates intersects with the moving direction of the object to be inspected. A plurality of receiving electrode plates for receiving high frequency waves from the transmitting electrode plates are provided opposite to the transmitting plate, respectively, and high frequencies are supplied to the plurality of transmitting electrode plates from the transmitter via an electronic switch. 171 frequencies are received from the receiving pole plate via an electronic switch corresponding to the 11th optical signal, and the level of each section can be adjusted by passing through a respective regulator. An inspection head for inspecting glue, etc., characterized by being configured as follows.