JPH03212329A - Packaging method - Google Patents

Abstract

PURPOSE:To improve packaging strength by a method wherein two adhesive application guns each arranged on both sides of a conveyor, and the front two guns apply an adhesive on the front surface of a case and front parts of right and left surfaces, and the rear two guns apply the adhesive on the rear surface of the case and rear parts of the right and left surfaces, and a film is bonded on four side surfaces of the case. CONSTITUTION:Two adhesive application guns 50, 60 are respectively arranged on the right and left on a conveyor 10. These guns 50, 60 are arranged in the direction which is approximately 45 deg. to the advancing direction of the conveyor 10. When a case 1 approaches on the conveyor 10, application of an adhesive is started by the front right and left guns 50 when the front side surface of the case 1 reaches point A, and for the rear side of the case, the application is started by the guns 60 at point B. When the case 1 has moved up to a position 1', the application by the guns 50 is stopped at point C, and the application by the guns 60 is stopped at point A. After the adhesives 5, 5' have been applied on four surfaces of the case 1 by this method, a film 3 is bonded on respective surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a no-shrink packaging in a packaging machine (see FIG. 5).

[Conventional technology]

In half-shrink packaging, a can 2 housed in a case 1 as shown in FIG. 5(a) K is covered with a film 3 as shown in FIG. And the film is shrunk while covering the can 2.

Conventionally, this half-shrink packaging has been carried out using an apparatus shown in FIG. In the figure, the case 1 flowing on the conveyor 10 is turned over by the turn device 15 so that the longitudinal direction of the case 1 becomes the traveling direction, and then adhesive is applied to the left and right side surfaces of the case in the longitudinal direction using a gun 060. Apply with
Thereafter, the orientation is reversed again using the turning device 16, and the adhesive-applied surface is arranged perpendicular to the conveyor 10, and then fed into the wrapper.

Here, the film 3 is adhered to the case 1 using an adhesive for each case using a partition plate called Flight No. Z-21. Here, the wrapper holds and moves the flight par 21 with an endless chain n. A is the drive gear of the endless chain n, and δ is a device that cuts the film 3 between the cases.

Case a is covered with film 3 for each case,
The film enters the heating furnace, where it heat-shrinks and tightly wraps the case. After that, the film 3 is pressed onto the roller case in the advancing direction, that is, on the side surface to which no adhesive is applied, and the process is completed.

[Problem to be solved by the invention]

When the case 1 is packaged using the conventional device as described above, the adhesive 5 can only be applied to the longitudinal sides of the case 1 as shown in FIG. So,
As shown in FIG. 7(1)), the case width direction, that is, the portion indicated by 6 in the figure, is only pressed by the rollers and is not sufficiently adhered to the case 1, making it easy to peel off. Products packaged using this method have problems such as weak packaging strength.

The present invention aims to solve the above-mentioned problems and provide a packaging method with strong packaging strength.

[Means to solve the problem]

(1) Apply adhesive not only in the longitudinal direction of the case but also in the width direction.

(2) As for the application method, it is applied directly to the cases flowing on the conveyor using four guns, two on each side.

(3) To adhere the film in the width direction of the case, the film is pressed with air or mechanically adhered using the guide 9.

[For production]

Figure 2 shows the adhesive application method. (,) indicates a plan view. Guns for applying adhesive on the left and right sides of the converter 10.

Arrange two ωs each. This gun 50.60 is conveyor 1
It is arranged at an angle of about 45 degrees with respect to the direction of travel of zero. As the case 1 flows on the conveyor 10, when it reaches a point on the front side of the case, application of adhesive is started using gun marks on the left and right front sides. Start applying with the gun (A) at point 0 on the rear side of the case. Then, when the case 1 moves to the position 1', the gun (supply) stops coating at the 0 point, and the gun ω stops coating at the 0 point.

By this method, the front side of case 1 is
As shown in Figure 5, apply toward both ends with point M at the center of the tray as a reference.
Then, coat the side surface of the case in the direction of conveyor movement as indicated by 5' and complete at point N.

On the rear side of the case, as shown in FIG. 2(Q), the coating starts from point N, which is indicated by the side surface 5' of the case in the direction of conveyor movement, and is completed at point M at the center of the case while applying to the longitudinal side.

When the adhesives 5 and 5' are applied to the four sides of the case 1 in this manner, the packaging form shown in FIG. 4 is obtained.

Figure 4 (,) shows case 1 with adhesives 5 and 5' applied.
Figure 4(b) shows the product after film packaging. As shown in the figure, the film 3 is adhered to all four sides of the case, so that it can be packaged securely.

〔Example〕

FIG. 1 shows an embodiment of the packaging method of the present invention.

Detection sensor 51°6 of case 1 is installed on the upstream side of conveyor 10.
1 is installed, and from the signal detected by this sensor, the conveyor 1
Guns (equipment) for applying adhesive placed on the left and right sides of 0.

Apply adhesive to case 1 at ω. After adhering the film 3 with the - add and cutting the film 3 with the cutting device 6, fold the film 3 in the width direction of the case 1, that is, the side facing the direction of conveyor movement, with the flap folding guides 70 and 71 and adhere it. After that, it is shrunk in a heating furnace I, and then finished by pressing the side surface with a finishing roller.

Here, the film adhesion in the width direction of case 1 is 70°71
Although the flap folding guide 9 shown in FIG. 3 is used, the method is not limited to this, and the method shown in FIG.

In FIG. 3(a), compressed air is sprayed from a nozzle onto the part of the film 3 indicated by the flap 6, and the adhesive 5'
This method is to attach it to the

In this case, as shown in FIG. 1, the film may be bonded immediately after being cut inside the wrapper.

The method shown in FIG. 3(b) is a method using a flap folding guide and a folding jig 91.

The flap folding guy V90 is a fixed guide for folding the film flap 6' of the case 1, and 91 is a reciprocating folding jig that folds the flap 6 into the head of the fixed guide. It is similar to the flap folding of the pawl device.

〔Effect of the invention〕

In the present invention, a large number of cases in which products are stored in a manner that protrudes upward from the open top surface of the case is conveyed by a conveyor, adhesive is applied to the side surface of each case, and then a heat-shrinkable film is supplied. A packaging method in which the film is bonded to the case with the adhesive on a conveyor, the film is cut for each case, and the film is shrunk in a heating furnace,
Two adhesive application guns are placed on each side of the conveyor, and the two guns at the front apply adhesive to the front of the case and the left and right sides, and the two guns at the back apply adhesive to the rear and left and right sides of the case. By applying adhesive to the rear of the surface and bonding the film with adhesive applied to the four sides of the case, the following effects are achieved.

When packaging according to the method of the present invention, the four corners of the case are completely covered with the film, and the film is bonded to the four sides of the case, so the packaging strength is improved. 1.5
When compared in a drop test in which the case is dropped from a height of 77I to the floor, in the conventional method, the corner of the case breaks after one drop, whereas in case (7) of the present invention, the case is strong enough to not break up to three times.

Furthermore, since there is no need to turn the case over when applying adhesive, there is also the advantage that the line can be shortened.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a packaging device implementing the present invention, and Fig. 2 (
, ) are plan views showing the arrangement of the adhesive application guns in Figure 1, Figures 2(b) and (c) are explanatory diagrams of the adhesive application situation by the front and rear guns, and Figure 3(a). . (b) is a schematic diagram showing another method of flap-folding the film on the side surface in the width direction of the case, and FIG. 4(a). (b) is a perspective view showing the adhesive application situation and packaged product according to the present invention, FIGS. 5(a) and (1)) are explanatory views of half-shrink packaging, and FIG. 6 is a perspective view of a conventional packaging device. FIGS. 7(a) and 7(b) are perspective views showing the conventional adhesive application situation and packaging method. 1... Case 3... Film 10...
Conveyor Addition... Wrapper δ... Cutting device
Heater... between heating furnaces, 60... guns

Claims (1)

[Claims] A conveyor transports a large number of cases in which the products are stored in a way that protrudes upward from the open top of the case. After applying adhesive to one side of each case, a heat-shrinkable film is supplied and the product is placed on the conveyor. In a packaging method in which the film is adhered to the case with the adhesive, the film is cut for each case, and the film is shrunk in a heating oven, two adhesive application guns are placed on each side of the conveyor, and two guns are placed at the front of the conveyor. The two guns apply adhesive to the front of the case and the front of the left and right sides, and the two guns at the back apply adhesive to the rear of the case and the rear of the left and right sides, and the adhesive applied to the four sides of the case. A packaging method characterized by adhering a film with an agent.