JPS60193818A - Method of detecting body to be laminated - 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 The present invention relates to a method for determining and detecting the presence or absence of a pregnant body to be pasted to a packaging box and the quality of the pasting position.

1 consisting of paper carton pack containers, etc. For Type I packaging γη bodies, objects to be pasted, such as tag labels, are often adhesively pasted to the front surface of the box at the packaging stage. For example, as shown in FIG. 1, a packaging box 10 consisting of a paper carton pack in which the beverage filled inside is sucked through a straw has circular through holes 12 bored at predetermined locations. At the same time, the through hole is lined with laminated paper such as aluminum foil, and when drinking, the lining part 13 has a stopper 14□. 1□Oyo l:lt v'A5.6゜yu,. , because the lining part 13 is directly exposed to the outside.

There was a hygienic problem in that dust inevitably adhered to the inner lining during display at stores and during transportation. Therefore, as a recent trend, as shown in Fig. 1(a), the lining part 13 of the beverage pack is coated with a pasted object 16 made of a tag label, thereby preventing the adhesion of foreign dust. Effective measures have been proposed.

The object to be laminated 16 is directly laminated to the packaging box body 10 by applying an adhesive such as glue or a low pressure sensitive adhesive. and a non-adhesive portion 16b which functions only as a knob portion.
[Above-mentioned Adhesive Portion], 6a is adapted to be bonded and adhered to a local area of the inner lining of the packaging segment 10. As a result, the lining part 13 is covered with the object 16 until just before drinking, and a sanitary state is maintained. When drinking, the straw 1/l can be penetrated into the lining part 13 by simply peeling and removing the bonded object 16 as shown in FIG. 1b.

By adhesively bonding the object to the packaging box in this way, it is possible to easily and reliably maintain suitable sanitary conditions, but at the packaging stage of the packaging box, there are often This results in inconveniences such as the objects to be bonded are not bonded to the packaging box, or the bonding position is shifted and the bond is not bonded to an appropriate position. When such a bonding defect occurs, it is necessary to detect this in advance and discharge it to the outside of the packaging line each time so that the defective product is not shipped as a product. For this reason, the conventional method has been to use an image sensor such as a television camera to project the appearance of the packaging box on both sides of the television so that workers can constantly monitor it with their naked eyes, but this method requires high equipment and labor costs. In addition to being extremely bulky, there are also drawbacks such as relying on the naked eye, which means there is always a risk of oversight, and the development of an effective alternative method has been awaited.

The present invention does not require the use of expensive image sensors or relying on the operator's naked eye to determine the quality of the bonding state of objects to be bonded (the presence or absence of objects to be bonded and the quality of the bonding position) as described above. The purpose is to provide a simple and reliable method of detection without causing any damage.

In order to achieve this object, the method for detecting a bonded object according to the present invention detects the bonding state of a bonded object consisting of an adhesive portion that is bonded to a packaging box body and a non-adhesive portion that functions as a knob. When the packaging box body is being transported, wind is supplied to a portion of the packaging box body where the objects to be bonded are scheduled to be bonded; a sensor detects curling up of the non-bonded portions of the objects to be bonded due to the wind pressure; The present invention is characterized in that the presence or absence of the object to be bonded and the quality of the bonding position are determined.

Next, the detection method according to the present invention will be explained in relation to the apparatus that implements the method. In FIG. 2, packaging boxes 10 made of paper cartons filled with beverages, for example, are sequentially conveyed on a conveyor belt 18 in the direction of the arrow. This packaging box 10 is similar to the box shown in FIG.
The objects to be packed 16 are pasted to the surface of the box at their adhesive portions 16a, and the non-adhesive portions 16b, to which no adhesive is applied, lie substantially tightly on the surface of the box. (See the box on the left side of Figure 3). At this time, the object to be bonded 16 is placed on the conveyor belt 18 so as to be positioned on the packaging box 1.0-(1) J, x plane.
The open end side of the non-adhesive portion 16b is oriented toward the conveyance direction of the packaging box body 10.

At a suitable position above the conveyor belt 18, an air blowing pipe 26 having a large number of air blowing holes is arranged perpendicular to the conveying direction of the belt. High-pressure air is supplied to the air blow-off pipe 26 via a pipe body 25 that is communicatively connected to the air supply source 22 and the control valve 24, and the high-pressure air is blown out from the air blow-off hole. As shown in FIGS. 2 and 3, the high-pressure air is blown out at an angle toward the open end of the non-bonded portion 16b of the bonded object 16.
It is assumed that it is set to point diagonally downward.

In addition, a pair of light emitting elements 2 are provided in the longitudinal direction of the conveyor belt 18.
A light sensor 28 consisting of a light receiving element 8a and a light receiving element 28b is disposed, and an optical axis j connecting the pixel elements is connected to a light sensor 28 that is connected to a light receiving element 28a and a light receiving element 28b. The position is set so as to extend slightly above the trajectory (however, below the curling height of the non-adhesive portion 16b, which will be described later). Further, an article detection sensor 30, which also consists of a pair of light emitting elements 30a and a light receiving element 30b, is disposed approximately parallel to the air blowing pipe 26, and when the packaging box body 20 passes through the detection zone of this sensor, 1 It is designed to detect the arrival of a box. Note that the detection outputs of both sensors 28 and 30 are subjected to signal processing in an electric control circuit (not shown).

Next, the operation of the method of the present invention implemented using the apparatus configured as described above will be explained. From the air blowing pipe 26, high-pressure air is blown in the direction opposite to the conveying direction of the packaging box 20 to form a high-pressure air blowing zone diagonally below the conveying direction. Bell 1-
The packaging boxes 20 placed on the packaging boxes 18 will sequentially pass through the high pressure air blowing zone. That is, as shown in FIGS. 2 and 3, when the packaging box 20 with the object to be bonded 16 in contact reaches the high-pressure air blowing zone diagonally below the air blowing pipe 26, the adhesive is released. The adhered portion 16b which is not coated with A is curled up by the wind pressure. At this time, a pair of optical sensors 28 are disposed above the general conveyance belt, and the front shaft 1 of the optical sensor 28 is placed on the packaging box body 20 above the conveyance belt.
Since it faces at a position that is slightly lower than the height of the top surface, the part 16b to be adhered that is rolled up by the wind pressure.
will block the optical axis 1. As a result, the optical sensor 28
detects that the object to be bonded 16 is bonded to the box (step 1).

Further, another sensor 30 disposed perpendicularly to the transport direction of the packaging box 10 detects passage of the packaging box 20. Therefore, the box passage detection signal from the article detection sensor 30 and the object detection signal from the optical sensor 28 are input to an electric circuit (not shown), and with the satisfaction of the uniformity detection signal as an AND condition, the objects to be bonded are packaged. It is determined that it is securely attached to the box body 20. If a mistake occurs in the previous process and the objects to be bonded are not bonded, or if the objects are bonded but are deviated from the appropriate position, the article detection sensor 30 detects the passage of the packaging box 20. Even if detected, the optical sensor 28 does not operate, so the AND condition does not hold true in the electrical control circuit. At this time, the operator is warned of the absence of the object 16 to be bonded or the defective bonding position by means of an alarm such as a sound or a low light.

Alternatively, instead of this alarm, a pusher (not shown) may be operated to forcibly eject the defective product to the outside of the conveyor belt 18.

As described above, according to the detection method of the present invention, the bonded portion of the objects to be bonded is rolled up by blowing high-pressure air, and this is detected by a sensor to determine the bonded state of the objects to be bonded, that is, packaging. The presence or absence of the object to be bonded in the box and the quality of the bonding position can be detected extremely reliably.

Therefore, compared to the conventional method of using an expensive image sensor and constantly inspecting with the naked eye, it is possible to perform more reliable detection with lower equipment costs, and does not require a special inspector. Therefore, it has many beneficial advantages, such as saving labor costs.

Note that in this example, an optical sensor was used to detect the bonded part that curled up or cracked due to the blowing of high-pressure air, but non-contact sensors that use ultrasonic waves or magnetism as detection means are also suitable. Used for A. It is b. In addition, it is not limited to detecting objects to be pasted that cover the inner lining of the piercing portion of straws in drinking packs, etc., but also to properly apply the detection of objects to be pasted, such as objects used as tongues for opening shrink packaging. Of course, this method can also be used to detect the alignment state as appropriate.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a packaging box to which objects to be bonded are adhered, and FIGS. 2 and 3 are explanatory diagrams of an embodiment of an apparatus for carrying out the method according to the present invention.

Claims (1)

[Claims] Detecting the bonding state of the bonded object consisting of the bonded part bonded to the packaging box body and the non-bonded part that functions as a gripping part b' = When the packaging box body is being transported, the packaging Wind is supplied to the part of the box body to be bonded to the U° body to be pasted, and a sensor detects curling in the non-bonded portion of the body to be pasted due to the wind pressure, and the presence or absence of the body to be pasted is determined; and a method for detecting objects to be bonded by determining whether the bonding position is good or not and detecting 'IL'N signs.