JPH07291280A - Composite packing material - Google Patents

Abstract

PURPOSE:To achieve joining without the use of an adhesive or a staple and in an easily separable manner by providing a plastic member having an insertion hole and an interior cavity, into the insertion hole of which an end part of a corrugated cardboard, bent over in part, is inserted so that the bent part is let turn up inside the interior cavity under its own power of restitution and fixed. CONSTITUTION:A polystyrene foam member 1 as a plastic constituent of a composite packing material has in one end an insertion hole la for a corrugated cardboard 2 and an interior cavity 1b in continuation therefrom. The insertion hole 1a has a height H which is a little over two times the thickness of the corrugated cardboard 2 and a breadth which is a little over that of the forward end of the corrugated cardboard 2. The interior cavity 1b has a height (h) which is larger than the height H of the insertion hole 1a and a breadth which is the same as that of the latter. The end of the corrugated cardboard 2 to go into the polystyrene foam member 1 forms to a prescribed length of (d) a bent part 2a with its power of restitution made to work by being bent over by an angle of less than 180 deg..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite packaging material in which a plastic member and a corrugated cardboard member are joined together, and more particularly to a joining means therefor.

[0002]

2. Description of the Related Art As a conventional joining means for a composite packaging material in which a plastic member and a corrugated board member are joined, a joining means by an adhesive or a joining means by a staple is used. In these joining means, the joining position of the plastic member and the corrugated board member may be displaced during the joining operation. In addition, since they can be firmly bonded but are difficult to disassemble, the disposal method after use is either incineration or landfill.

[0003]

As described above, in the conventional composite packaging material in which the plastic member and the corrugated board member are joined, the joining means by the adhesive or the staple is used, so that the plastic member and the corrugated board member are joined together. However, there is a drawback in that the coupling position may be displaced. Further, in the case of using an adhesive, there is a problem that it takes a considerable time to be completely dried and fixed. Further, since it is difficult to separate the plastic member and the corrugated board member, there is a problem that the resources cannot be reused.

[0004]

The composite packaging material of the present invention is a composite packaging material in which a plastic member and a corrugated board member are joined together, and has an insertion opening having a height about twice the thickness of the corrugated board member. The plastic member having a height that is at least twice the thickness of the corrugated cardboard member and an internal hole having a depth that is substantially the same as the dimension of the bent portion at the tip portion of the corrugated cardboard member, and the bent portion at the tip portion are predetermined. The corrugated cardboard member bent by less than 180 degrees while having a restoring force by the length, and the bent portion of the tip end portion of the corrugated cardboard member is inserted from the insertion port of the plastic member, The bent portion of the tip portion of the corrugated board member is restored inside the inner hole, and the end face of the bent portion is brought into contact with the side wall of the inner hole.

[0005]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a state in which a styrofoam member and a corrugated board member are joined together in the embodiment of FIG.

In FIG. 1, a styrofoam member 1 which is a plastic member of a composite packing material has an insertion hole 1a for inserting a corrugated cardboard member 2 in its end face, and an internal hole 1b is continuous with the insertion hole 1a. have.

The height H of the insertion hole 1a of the Styrofoam member 1 is slightly larger than twice the thickness T of the corrugated cardboard member 2. The width of the insertion hole 1a is slightly larger than the width of the tip portion of the cardboard member 2. Further, the height h of the internal hole 1b is larger than the height H of the insertion hole 1a, and
The width of b is the same as the width of the insertion hole 1a. The height h of the inner hole 1b is preferably about 3 times the thickness T of the corrugated board member 2.

The end portion of the corrugated cardboard member 2 facing the styrofoam member 1 is bent 180 degrees by a length d to form a bent portion 2a. The bent portion 2a is a restoration of the corrugated cardboard member 2 itself. It is in a slightly open state due to the force and not in close contact. In the depth D of the internal hole 1b of the styrofoam member 1, the length of the bent portion 2a of the corrugated cardboard member 2 is slightly larger than d.

The Styrofoam member 1 thus constructed
When the cardboard member 2 and the corrugated cardboard member 2 are joined together, the corrugated cardboard member 2 is inserted into the insertion hole 1a of the styrofoam member 1 while the bent portions 2a of the corrugated cardboard member 2 are brought into close contact with each other. At this time, since the height H of the insertion hole 1a is slightly larger than twice the thickness T of the corrugated board member 2, the corrugated board member 2
Can be easily inserted into the styrofoam member 1.

When the corrugated cardboard member 2 is inserted further into the interior and the bent portion 2a reaches the inner hole 1b of the styrofoam member 1, the bent portion 2a opens in the inner hole 1b by its own restoring force. The end surface 2c of the bent portion 2a faces the side wall 1c of the internal hole 1b. When the cardboard member 2 is pulled out a little in this state, the end face 2c contacts the side wall 1c, and the styrofoam member 1 and the cardboard member 2 are joined.

When the present composite packaging material is used up and discarded, the corrugated cardboard member 2 is forcibly pulled out from the styrofoam member 1. As a result, the corrugated board member 2 is pulled out and separated from the styrofoam member 1 while deforming the bent portion 2a. The styrofoam member 1 and the corrugated cardboard member 2 that have been separated can be reused as resources.

The insertion hole 1a of the polystyrene foam member 1
When the number of the insertion holes 1a is 2 or more, the width of the insertion hole 1a is the same as the width of the bent portion 2a of the corresponding corrugated board member 2 in which only the width of one insertion hole 1a is the same, or any two Insertion hole 1a
The bent portions 2a of the two corrugated cardboard members 2 corresponding to the intervals of
However, the width of the other insertion hole 1a may be sufficiently wider than the width of the corresponding bent portion 2a of the corrugated board member 2.

[0014]

As described above, in the composite packaging material of the present invention, the plastic member is provided with the insertion port having the internal hole, the end of the corrugated cardboard member is bent and inserted into the insertion port of the plastic member, and the corrugated cardboard is inserted. By opening and fixing the bent part of the member in the internal hole of the plastic member by its own restoring force, it is possible to bond without using adhesive or staple, so there is no displacement of the bonding position. Moreover, there is an effect that no time is required for drying. Further, since the plastic member and the corrugated board member can be easily separated, there is an effect that resources can be reused.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a styrofoam member and a corrugated board member are joined together in the embodiment of FIG.

[Explanation of symbols]

 1 Styrofoam member 1a Insertion hole 1b Internal hole 1c Side wall 2 Corrugated cardboard member 2a Bent portion 2c End surface

Claims (2)

[Claims] 1. A composite packaging material in which a plastic member and a corrugated board member are joined together, wherein at least one insertion opening having a height about twice the thickness of the corrugated board member and continuous with the insertion opening. A plastic member having a height that is at least twice the thickness of the corrugated board member and an internal hole having a depth that is substantially the same as the length of the bent portion of the front end portion of the corrugated board member; Just give it resilience 1
A composite packaging material, comprising: the corrugated cardboard member that is bent at less than 80 degrees to form a bent portion. 2. A composite packaging material in which a plastic member and a corrugated cardboard member are combined, the insertion port having a height of about twice the thickness of the corrugated cardboard member, and the insertion port continuous with the insertion port. The plastic member having a height more than twice the thickness and a depth inside hole having substantially the same size as the length of the bent portion of the tip of the corrugated cardboard member, and the tip end having a restoring force of a predetermined length. And a corrugated cardboard member having a bent part formed by bending the corrugated cardboard member by less than 180 degrees, and inserting the bent part of the tip end part of the corrugated cardboard member from the insertion opening of the plastic member, A composite packaging material, wherein a bent portion of the tip portion of the corrugated board member is restored inside the inner hole, and an end surface of the bent portion is brought into contact with a side wall of the inner hole.