JP3095923B2 - Inner coating device for cup-shaped containers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cup-shaped container inner surface coating apparatus provided with a coating machine for spraying a coating material toward an inner surface of a cup-shaped container rotated at high speed.

[0002]

2. Description of the Related Art For example, a styrofoam cup-type container for holding instant noodles has a slight air permeability to itself, so that even in a closed state, the quality of dried noodles raised with vegetable oil and the moisture absorption of ingredients are improved. Deterioration progressed, and the net period of instant noodles could not be kept long. For this reason,
In addition to instant noodles for overseas, which are transported over a long period of time by sea, etc., recently, cup-type containers for instant noodles for domestic use are coated with a resin film to extend the shelf life. I have to.

[0003] Instant noodles placed in a cup-shaped container whose inner surface is coated with a resin film as described above not only have a good shelf life, but also have a good taste immediately after production for a long period of time, and the product quality is remarkably high. To be enhanced,
The present applicant has proposed a coating apparatus for applying a resin liquid to the inner surface of a cup-shaped container to be mass-produced at a speed corresponding to the production tact (Japanese Patent Application Laid-Open Nos. 1-281164-281166, 2).
Nos. 81170 and 299,661). This coating device masks the periphery of the opening of the cup-shaped container, and rotates the resin at a high speed in a pattern that extends from the center of the bottom surface of the cup-shaped container to a region extending from the center of the cup-shaped container to the periphery of the opening along the radial direction. The entire inner surface of the cup-shaped container is coated by airless spraying a coating material such as a liquid.

[0004]

[SUMMARY OF THE INVENTION However, the resin liquid is coated on the inner surface of the cup-type container is originally high viscosity, since the cured immediately touch the air, the nozzle of the applicator is prone to clogging There is a problem that
Was. Also, viscosity changes depending on application conditions such as air temperature, and nozzle holes wear due to long-term use,
There has been a problem that the spray pattern changes during coating , causing poor coating .

[0005] For example, when the nozzle is clogged, the spread angle of the spray pattern becomes too small or the spray direction shifts, so that the coating material cannot be adhered to the entire inner surface of the cup type container. Further, when the nozzle holes are worn, not only the spray pattern is widened, but also the discharge amount is increased, so that it is impossible to apply with uniform quality. Furthermore, in the case where the clogging of the nozzle is immediately removed by the pressure of the resin liquid, a good product and a defective product are mixed and conveyed. Therefore, the non-defective product and the defective product must be separated after the application is completed. Therefore, the present invention detects the spread angle of the spray pattern of the coating material sprayed from the coating machine, and accurately determines whether or not the inner surface of the cup-shaped container can be normally coated, and determines whether the product is good or defective. It is a technical task to be able to automatically sort out the information.

[0006]

SUMMARY OF THE INVENTION To solve this problem, the present invention provides a cup-shaped container transported by a transport mechanism.
An applicator is installed that sprays the application material in a pattern extending from the center of the bottom surface of the cup-shaped container to the inner surface of the cup-shaped container while extending at high speed at the application position from the center of the bottom surface to the periphery of the opening. In the inner surface coating device of the cup-shaped container, each time the coating material is sprayed from the coating machine, the detection means for optically detecting the spread of the pattern, and the spread of the pattern detected by the detection means are preset. control means for outputting an abnormality signal when the deviation from the permissible range, and a sorting means for dropping from the conveying mechanism by sorting coated cup-shaped container when said signal based on the abnormality signal is output It is characterized by having.

[0007]

According to the present invention, each time the coating material is sprayed from the coating machine, the spread angle of the spray pattern is detected by a detecting means such as an image sensor, and the detected spread angle is set within a predetermined allowable range. Is determined. When the spray pattern deviates from the allowable spray pattern, an abnormal signal indicating that there is an abnormality in the application state of the cup-shaped container is output, and based on the abnormal signal, a defective cup-shaped container is selected and transported. Since it is dropped from the mechanism, there is no need to sort out non-defective products and defective products after painting is completed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments shown in the drawings. FIG. 1 is a cross-sectional view showing an inner surface coating device for a cup-shaped container according to the present invention, FIG. 2 is a plan view of the entire device,
FIG. 3 is a side view, and FIG. 4 is a sectional view taken along line AA.

The inner surface coating apparatus 1 shown in the present embodiment is configured such that styrofoam cup-shaped containers 3, 3... Sent from a pair of left and right air chutes 2R, 2L are successively separated by two index machines 4R, 4L. To the supply position XX, and the cup-shaped container 3 supplied to each supply position XX
Is transferred to the application position YY by the conveyor 5 and the inner surface is applied by the application machines 6 and 6 installed at the application position YY.
The resin liquid is sprayed in a pattern extending in a range from the center to the opening peripheral edge 3b along the radial direction.

The jigs 8, 8,... Pulled by the chain 7 are connected to the drive chain 7 of the conveyor 5, and the jigs 8 are connected to the cup type containers 3 by index machines 4R, 4L. Cup holders 9R and 9L that can be inserted and fitted from the bottom side are attached,
Vent holes 10R, 1 for attaching and detaching cup-shaped container 3
0L extends from the surface of the jig 8 to the bottoms of the cup holders 9R and 9L.

Above the conveyor 5, a pressure reducing cover for sucking the cup type container 3 supplied from the index machines 4R, 4L at the supply positions XX into the cup holders 9R, 9L. C ₁ is provided, the pressing cover C ₂ to discard sorted defective cup in a subsequent predetermined position Z-Z is provided from the application position Y-Y. The cup-shaped container 3 is placed at the supply position XX at a reduced pressure cover C _1.
Since only been sucked is fitted holding the holder 9R, the 9L by sorting position Z-Z in a pressurized cover C ₂ from the holder 9R, by supplying compressed air into the 9L, easy cup-shaped container 3 Can be removed. The cup holders 9R and 9L are fixed to the side surfaces of rollers 11R and 11L rotatably attached to the jig 8,
By rotating the rollers 11R and 11L by endless belts 12 arranged side by side on the conveyor 5, the holder 9
R, apply the cup-shaped containers 3, 3 mounted on 9L to the application position Y
It is designed to rotate at a high speed at -Y.

Reference numeral 13 denotes an image sensor such as a CCD camera for detecting the spread of the spray pattern P from the side surfaces of the coating machines 6 and 6. A large number of pixels are two-dimensionally arranged in a matrix. The detected signal is transmitted to the controller 14.
Is output to The control device 14 has a maximum allowable spray pattern Pmax at which the cup-shaped container 3 can be appropriately applied.
Each time the image sensor 13 detects the spray pattern P, the minimum allowable spray pattern Pmin is compared with the maximum allowable spray pattern Pmax and the minimum allowable spray pattern Pmin, and the spray pattern P is set to the maximum allowable spray pattern Pmin. If it is larger than Pmax or smaller than the minimum permissible spray pattern Pmin, it is determined that it is out of the permissible range, and an abnormal signal is output.

The maximum allowable spray pattern Pmax is set in a limit range where coating failure does not occur due to an increase in the amount of resin liquid supplied, and the minimum allowable spray pattern Pmin indicates that the resin liquid adheres to the entire inner surface of the cup-shaped container 3. Is set to the limit range. Specifically, for example, the maximum allowable spray pattern Pma
x is set in a range extended by a predetermined angle from the spread angle of the initial spray pattern at the time of nozzle replacement, and the minimum allowable spray pattern Pmin is defined as a straight line L ₁ connecting the rotation center of the cup type container 3 and the nozzle 15 of the coating machine 6. A straight line L ₂ connecting the tip of the rotation radius R of the cup-shaped container 3 and the nozzle 15 of the coating machine 6.
Is set in the range enclosed by.

The controller 14 discharges the resin liquid toward the inner surface of the cup-shaped container 3 and then sets a predetermined timing (for example, a timing of 5 to 50 msec immediately after the start of the discharge).
Reads the detection signal from the image sensor 13, and determines whether or not the spray pattern P is normal based on the detection signal. For this timing, when the resin liquid is sprayed toward the inner surface of the cup container 3, a time period during which the spray pattern P can be accurately detected without being affected by the soared resin liquid is selected.

If the detected spray pattern P is out of the allowable range, an abnormal signal is output,
Blink the alarm lamp or sound the alarm to notify the worker. The abnormal signal is the pressure cover C
_The pressurized air is also supplied to the pressurized air supply source 17 connected to _{2 and} when the cup-shaped container 3 with poor application arrives at the position Z-Z, pressurized air is supplied and the cup-shaped container 3 is removed. Sorted and disposed of.

The above is an example of the configuration of the present invention, and its operation will be described next. First, the controller 14 controls the minimum allowable spray pattern Pmin and the maximum allowable spray pattern Pma.
Set x. Then, each time the cup-shaped container 3 arrives at the application position YY, the resin liquid is sprayed for a certain time to perform the inner surface application.

In this case, every time the resin liquid is discharged into the cup-shaped container 3, the spray pattern P before the resin liquid rises is detected by the image sensor 13, for example, at a timing of 5 to 50 msec immediately after the start of the discharge. You. Then, the detected spray pattern P is input to the control device 14,
The abnormal signal is compared with the maximum allowable spray pattern Pmax and the minimum allowable spray pattern Pmin, and when the value exceeds the allowable range, that is, when it becomes larger than the maximum allowable spray pattern Pmax and becomes smaller than the minimum allowable spray pattern Pmin, an abnormal signal is output. Is output.

An abnormal signal is output from the control device 14.
Flashes the alarm lamp or sounds an alarm.
To notify the operator that the spray pattern P is abnormal.
A cup-shaped container 3 that informs and outputs an abnormal signal
Is conveyed by the conveyor 5 and arrives at the sorting position Z-Z.
The pressurized air supply source 17 is activated to _Two
Pressurized air is supplied to the
Drop from rudder 9R, 9L.

Therefore, although the cured resin liquid adheres to the discharge hole of the nozzle 15 and causes clogging, the non-defective product is immediately removed by the pressure of the resin liquid discharged from the discharge hole. Even when the defective product and the defective product are conveyed together, the defective product is dropped at the sorting position, and only the non-defective product remains, so that it is not necessary to separate the non-defective product from the non-defective product after the application . If the alarm only sounds temporarily, the application may be continued without replacing the nozzle 15. If the alarm sounds continuously, the nozzle 15 is replaced, and based on the initial spray pattern P at the time of replacement, After the maximum allowable spray pattern Pmax is reset, the application may be restarted.

In the description of the embodiment, the case where a CCD camera is used as the image sensor 13 has been described. However, the present invention is not limited to this, and it is possible to detect that the spray pattern P deviates from the allowable spray pattern Pt. Any detection means can be adopted, for example, an optical sensor is arranged at an edge position of the allowable spray pattern Pt, and the edge of the spray pattern P is determined based on the output of the optical sensor. It may be one that optically detects whether or not it is inside.

[0021]

As described above, according to the present invention, the inner surface of the cup-shaped container can be normally applied based on whether or not the detected spray pattern is within a predetermined allowable range. Can be accurately determined, and if it is determined that the coating has not been performed properly, only the defective cup-shaped container is selected and dropped from the transport mechanism.
Only the non-defective product remains in the transport mechanism, and there is an excellent effect that no trouble is required to select a non-defective product from a non-defective product after the application is completed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an inner surface coating device for a cup-shaped container according to the present invention.

FIG. 2 is a plan view of the entire apparatus.

FIG. 3 is a side view thereof.

FIG. 4 is a sectional view taken along line AA.

[Description of Reference Numerals] 1 ... internal surface applicator 3 ... cup-shaped container 5 ... conveyor 6 ... coater X ... feed position Y ... coating position Z ... sorting position C ₁ ..Pressure reduction cover C ₂ .Pressure cover 13 ... Image sensor 14 ... Control device 15 ... Nozzle

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-281164 (JP, A) JP-A-1-281165 (JP, A) JP-A-1-281166 (JP, A) JP-A-2- 9475 (JP, A) JP-A-6-226165 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05B 13/06 B05B 12/08 B05B 15/00

Claims (1)

(57) [Claims] 1. A cup transported by a transport mechanism (5).
While rotating the mold container (3) at the application position (Y) at a high speed,
Towards the inner surface of the cup-shaped container (3), a bottom surface (3a) from the center along a radial direction applicator for spraying the coating material in a pattern extending the range extending to the opening portion (3b) of (6) Each time the coating material is sprayed from the coating machine (6) in the inner coating device of the cup-shaped container in which
Detection means (1) for optically detecting the spread of the pattern
3); control means (14) for outputting an abnormal signal when the spread of the pattern detected by the detecting means (13) deviates from a preset allowable range; and An inner surface coating device for a cup-shaped container, comprising: sorting means (C ₂ ) for selecting a cup-shaped container (3) applied when output and dropping the cup-shaped container from the transport mechanism (5).