JPS6036146A - Bonding method on formation of corrugated box - 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 of bonding a longitudinal side bottom plate and a width side bottom plate of a cardboard box when forming the same.

Conventionally, when forming a cardboard box, first 1) the side bottom plates are folded horizontally inward, then the longitudinal side bottom plates are folded inward horizontally and overlapped with the width side bottom plates, and then these longitudinal side bottom plates are folded horizontally inward; This was done by integrally securing the width and bottom plates with staples.

However, when the paper is stapled in this manner, the wavy reinforcing ribs inside the width side bottom plate and the wavy reinforcing ribs inside the longitudinal side bottom plate of the stapled part are crushed by the crimping of the stapler. This has the disadvantage that the strength (rigidity) of the bottom plate of the cardboard box is lost. Moreover, the reinforcing ribs inside the side bottom plate (d) and the reinforcing ribs inside the longitudinal side bottom plate provide a cushioning effect during transportation, which is an advantage of a cardboard box.
If these reinforcing ribs are crushed, vibrations, shocks, etc. during transportation will be applied to the items stored in the cardboard box through both bottom plates, making the items extremely susceptible to damage. There was a drawback. Furthermore, when a book is stapled together, the stapled portion always protrudes inward from the cardboard box, which has the disadvantage of damaging the items stored in the cardboard box.

Therefore, recently, instead of fixing with staples,
There is a method in which a hot melt is interposed between the IJ side bottom plate and the FIFI longitudinal side bottom plate, and the width side bottom plate and the longitudinal side bottom plate are bonded by heating this hot melt.

According to this method, there is no protruding part formed on the inner surface of the cardboard box as in the case of fixing with staples, so it is possible to avoid damage to the items stored in the cardboard box. There is a drawback that the reinforcing ribs inside the bottom plate and the reinforcing ribs inside the longitudinal side bottom plate are crushed.

In other words, when bonding with true melt, 0 [■ mark [
1] With the side bottom plate and the 110 longitudinal side bottom plate pressed together,
Since the hot melt interposed between these parts must be heated, the reinforcing ribs on the bottom plate on the one side and the reinforcing ribs on the bottom plate on the longitudinal side end up being crushed during the squeezing.

Moreover, even if such Hot Mel F is once cured by heating, it will soften again by heating again, reducing the adhesive effect. The side bottom plate and the longitudinal side bottom plate peel off, causing an accident in which the bottom of the cardboard box falls out.

The present invention has been made in view of the above circumstances, and has the following objectives: 11) Reinforcement lip of the side bottom plate and reinforcing rig of the longitudinal side bottom plate are crushed during bonding. To provide an adhesion method for forming a cardboard box, which can prevent the above 11] side bottom plates and longitudinal side bottom plates from being peeled off even when heated again. There is a particular thing.

In order to achieve this purpose, the present invention 1 consists of overlapping the longitudinal side bottom plate and the RLJ side bottom plate constituting the cardboard box with a thermosetting adhesive interposed between them. By applying the ultrasonic horn, which is the output end of the ultrasonic welder, to the overlapping part with the adhesive interposed, 1.
The longitudinal side bottom plate 1o and the side bottom plate 1) are glued together.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a perspective view showing the state before forming a cardboard box.
Fold the l-+ side bottom plates 2, 2 horizontally inward from each other.

Next, a thermosetting adhesive 4 is applied to required positions on the outer surfaces 2a, 2a of the side bottom plates 2, 2.

Next, both longitudinal side bottom plates 3, 3 of the cardboard box are horizontally bent inwardly and stacked on the two side bottom plates 2, 2 with the thermosetting adhesive 4 interposed therebetween. .

In this state, as shown in FIG. 2, the ultrasonic welder is placed on the pedestal 7 and applied to the overlapping portion 5 with the thermosetting adhesive 4 interposed therebetween. horn 6
By applying heat and curing the thermosetting adhesive 4, both 1] side bottom plates 2.2 and both longitudinal side bottom plates 3, 3 are bonded to each other.

What is bonded in this way becomes a normal cardboard box 1, as shown in FIG.

Therefore, with such an adhesion method, when adhering the side bottom plate 2 and the longitudinal side bottom plate 3, there is no need to attach these bottom plates 2,
3, it is possible to effectively prevent the wavy reinforcing ribs 2b inside the rlj side bottom plate 2 and the wavy reinforcing ribs 3b inside the longitudinal side bottom plate 3 from being crushed. Therefore, the strength (rigidity) and cushioning effect of the bottom plate of the cardboard box l are not impaired in any way, and the items stored in the cardboard box can be safely stored.

In addition, since the adhesive used to bond the width side bottom plate 2 and the longitudinal side bottom plate 3 is a thermosetting adhesive, it does not need to be heated again like the conventional Honmelt. Bottom plate 3
There is no possibility that the cardboard will peel off, and the items stored in the cardboard boxes can be transported safely even during transportation in the summer.

If so, the reinforcement ribs inside the width side bottom plate and the inside of the long side bottom plate;
Since the reinforcing ribs of the cardboard box 1 are not crushed, the strength and cushioning effect of the bottom plate of the cardboard box 1 are not impaired in any way, and the width side bottom plate and the long side bottom plate are once bonded together. It is a material that has many practical benefits, such as the fact that it does not peel off even if it is reheated, and the items stored in the cardboard box can be transported safely.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of the present invention, so the first
The figure is a perspective view showing the state before the cardboard box is formed, Figure 2 is a side sectional view showing the state in which the width side bottom plate and the longitudinal side bottom plate J are glued together, and Figure 3 is a partially broken bottom plate of the cardboard box. This is a perspective view. 1... Cardboard box, 2... Width side bottom plate, 3... Nagatsuki side bottom plate, 4... Thermosetting adhesive, 6 Ultrasonic horn 0 Patent applicant Pearl Industries Co., Ltd. Agent Patent attorney Takashi Suzue - Figure 1 I 1 112m Figure 3

Claims (1)

[Claims] The longitudinal side bottom plate and the width side bottom plate that make up the cardboard box are stacked together with a thermosetting adhesive interposed between them, and the output of the ultrasonic well radar is applied to the overlapped portion with the adhesive interposed between them. A bonding method for forming a cardboard box, characterized in that the longitudinal side bottom plate and the )+Q [1] side bottom plate are bonded together by applying an ultrasonic horn to the ends.