JP2000344276A - Paper tube cushioning material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the balance of functions such as cushioning properties and strength, which are contrary to each other, by a structural design while a raw material of paper being used. SOLUTION: Semicylindrical paper tubes having suitable strength and cushioning properties with respect to stress are used as a cushioning member. That is, a paper tube cushioning material is. simply-structured in such a way that a rigid support member for a product is formed with a corrugated board sheet 1 in accordance with the shape of a product and that a flat surface of each of the semicylindrical paper tubes 2 of the cushioning member is fixed to the surface or the side faces of the sheet 1 formed into the shape of the product. Since the paper tube cushioning material thus formed is inexpensive, simple in manufacturing the same and also easy in recycling after use, it also serves for protecting resources.

Description

DETAILED DESCRIPTION OF THE INVENTION

[Technical field to which the invention belongs]

[0002] The present invention relates to home appliances, information communication devices,
The present invention relates to a cushioning material for packing used when transporting precision industrial equipment. [Conventional technology]

[0003] Conventionally, as a cushioning material for packing home electric appliances and the like, a material in which foamed styrene is adhered to a corrugated cardboard sheet has been widely used. However, styrene foam is difficult to dispose after use, and has recently become a major social problem. [Problems to be solved by the invention]

[0004] For this reason, there is a need for a paper cushioning material that is inexpensive and easily recyclable. However, the cushioning material is difficult to develop because the cushioning property and the strength are essentially inversely related. [Means for solving the problem]

[0005] As a result of earnest research on these problems,
The above-mentioned problem is solved by using a semicircular paper tube having structural characteristics that combines the flexibility of a circular or elliptical shape with the rigidity of a triangular or square shape as a buffer against stress. did. That is, the flat bottom portion of the semi-cylindrical paper tube serving as the buffer was fixed to the lower surface of the corrugated cardboard sheet serving as the product support, thereby completing a simple paper tube cushioning material. Depending on the weight of the product to be packed, the thickness of the paper tube can be increased or decreased to achieve a balance between cushioning and strength. [Embodiment of the invention]

Hereinafter, a typical embodiment will be described. 〔Example〕

FIG. 1 shows a flat panel type embodiment of the basic type of the paper tube cushioning material. This is an example in which the cross-sectional shape of the paper tube is a semicircle with a flat bottom, and two bottom surfaces of the semi-cylindrical paper tube are fixed to the lower surface of the cardboard sheet. This is mainly used by setting it on the lower surface or side surface of the product.

FIG. 2 shows an L-angle type embodiment. Two half-cylindrical paper tubes are fixed to the bottom and side surfaces of an L-shaped corrugated cardboard sheet, respectively. FIG.
There is also a method in which one 3/4 cylindrical paper tube is fixed to the ridge where two sides intersect with each one half cylindrical paper tube on the bottom and side surfaces. In each case, it is used by being set at the corner of the product.

FIG. 4 shows a triangular corner type embodiment. One semi-cylindrical paper tube is fixed to each of the three corners of a corrugated cardboard sheet consisting of two side surfaces and one bottom surface.
Used to be set on the corner of the product.

FIG. 5 shows an embodiment in which the cross section of the paper tube is trapezoidal. Similarly, it is fixed to the lower surface of the corrugated cardboard sheet. The trapezoid is inferior to a semicircle in cushioning property, but has a high strength and is suitable as a cushioning material for a heavy product.

FIG. 6 shows an embodiment in which a flat side is formed in a part of an arc having a circular or elliptical cross section of a paper tube, and this flat surface is fixed to the lower surface of a corrugated cardboard sheet. This example is suitable for a cushioning material of a product in which the buffering property is prioritized over the strength because the arc portion becomes large.

FIGS. 7, 8, and 9 show embodiments in which the cut surfaces of the paper tubes are directly adhered to the lower surface of the corrugated cardboard sheet because the flat surfaces of the paper tubes of the respective shapes are not cut.

FIG. 10 shows an example in which one side of a portion where an arc of a semi-cylindrical paper tube and a flat surface intersect is cut into a discontinuous state. This example is suitable for cushioning of light products. [Effect of the Invention] Since the cushioning material according to the present invention is made of a paper tube and a corrugated cardboard, it is inexpensive, easy to manufacture, and easy to recycle after use. Material.

[Brief description of the drawings]

FIG. 1 is a perspective view of a paper tube cushioning material according to the present invention.

FIG. 2 is a perspective view of an L-angle type cushioning material according to the present invention.

FIG. 3 is a perspective view of one embodiment of an L-angle cushioning material.

FIG. 4 is a perspective view of a triangular corner type cushioning material according to the present invention.

FIG. 5 is a perspective view of a cushioning material having a trapezoidal shape of a paper tube.

FIG. 6 is a cross-sectional view of a cushioning material in which a part of a circular arc or an elliptical arc of a paper tube has a flat surface.

FIG. 7 is a cross-sectional view of a cushioning material in which the shape of the paper tube is a semi-cylindrical paper tube having no bottom surface.

FIG. 8 is a cross-sectional view of a cushioning material in which the shape of a paper tube is a trapezoid without a bottom surface.

FIG. 9 is a cross-sectional view of a cushioning material in which a cross section of a paper tube has a shape obtained by cutting a part of a circular or elliptical arc.

FIG. 10 is a cross-sectional view of a cushioning material in which a cross section of a paper tube has a semicircular shape and a portion where an arc and a flat surface intersect is cut.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated cardboard sheet 2 Semi-cylindrical paper tube 3 L-shaped corrugated cardboard sheet 4 3/4 cylindrical paper tube 5 Triangular corner type corrugated cardboard sheet 6 Trapezoidal paper tube 7 Cylindrical paper tube with an arc larger than a half circle 8 Semi-cylindrical paper tube without a bottom 9 a trapezoidal paper tube without a bottom surface 10 a paper tube with an arc larger than a semicircle without a bottom surface 11 a paper tube with a part of the arc of a semi-cylindrical paper tube 12 cut

Claims (5)

[Claims] 1. A paper tube cushioning material having a semicircular cross section and a bottom surface of a semi-cylindrical paper tube having a flat bottom fixed to a lower surface of a corrugated cardboard sheet. 2. The method according to claim 1, wherein the cross section of the paper tube has a circular or elliptical arc and a flat side is formed in a part of the arc.
Paper tube cushioning material with this flat surface fixed to a corrugated cardboard sheet. 3. The paper tube cushioning material according to claim 1, wherein the cross section of the paper tube is trapezoidal, and the bottom surface of the trapezoidal column is fixed to a corrugated cardboard sheet. 4. The paper tube according to claim 1, wherein the cross-sectional shape of the paper tube is semicircular, in claim 2, a portion of a circular or elliptical arc is flattened, and in claim 3, it is trapezoidal. 4. The paper tube cushioning material according to claim 1, wherein each of the flat bottom portions is cut and has no bottom surface, and the cut surfaces of the paper tubes are directly fixed to the corrugated cardboard sheet. 5. The paper tube cushioning material according to claim 1, wherein a part of the periphery of each of the paper tubes is cut into a discontinuous shape and fixed to a corrugated cardboard sheet.