JPH01226574A - Cushion sheet for packing - Google Patents

Abstract

PURPOSE:To obtain a cushion sheet for packing which can be well preserved and easily handled and further which has a good appearance, by constituting slits so that the length of slits are longer than that of non-slits and the slits composing rows of the slits adjacent to other rows are positioned just aside at the non-slits thereof. CONSTITUTION:A cushion sheet 10 is made of kraft paper on the like. Rows with a number of slits, in which slits 11 (perforations lines) and non-slits 12 are alternately arranged almost on a linear line, are formed in parallel with each other on all the surface. The length L of the slit is longer than the length P of the non-slit 12. The slits 11 constituting the row of slits 13A adjacent to other rows are so arranged that the non-slits 12 constituting the other row 13B adjacent to the slits are positioned just aside at a nearly center point of the slits 11. When the both edges of the flat sheet 16 are pinched and a tensile strength F is applied in the crossing direction against the stretching direction of the rows of slits 13, the sheet material at the periphery of respective slits 11 is raised to form a honey comb frame 14 and hence the whole is deformed as a honey comb structure. The shock absorption due to the toughness of the honey comb frame 14 is available for a cushion member.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a packaging cushion sheet.

[Prior Art] Conventionally, when packaging breakable items such as glass products or foodstuffs such as fruits, packaging was done using crumpled old newspapers or synthetic resin materials to prevent impact from being applied to the items being packaged. The outer packaging is applied after wrapping the packaged items in the same cooking material.

[Problem to be solved by the invention] However, when using old newspapers, etc.

The work of crinkling the material to provide cushioning properties is complicated and aesthetically unsatisfactory.

Further, when a cushion material made of a synthetic resin material is used, the cushion material has a certain thickness, which makes it bulky even before use, and storage property is poor.

An object of the present invention is to provide a cushion sheet for packaging that is easy to store before use, and has good workability and aesthetics during use.

[Means for Solving the Problems 1] The present invention is a packaging cushion sheet in which a large number of slit rows in which slit portions and non-slit portions are alternately provided substantially in a straight line are formed in parallel over the entire surface of the sheet. The length of the slit portion is longer than the length of the non-slit portion, and the non-slit portion constituting the other slit row is located to the side of the slit portion constituting one adjacent slit row. .

"Function" Before using the cushion sheet for packaging of the present invention, when both ends of the flat sheet are grasped and a tensile force is applied in a direction crossing the extending direction of the slit rows, this tensile force is applied to the non-slit portions of the sheet. It spreads over the entire surface of the sheet, opens each slit, and bends and deforms the sheet material around each slit so as to form a waveform in the extending direction of the slit row. Due to the relationship between the sheet materials and the opening of each slit between the corrugations, the corrugations formed by the sheet materials are generated in line symmetry with each other.This allows the sheet material around each slit to The material stands up to form a honeycomb frame, and the entire flat sheet transforms into a honeycomb structure. A sheet having a honeycomb structure has a certain thickness due to the rise of the honeycomb frame, and also has shock absorption properties due to the stiffness of the honeycomb frame, and can be used as a cushion material for packaging.

Therefore, the packaging cushion sheet of the present invention is not bulky and has good storage properties, such as being able to be stored in a thin flat plate shape, for example, in a stacked state, when stored before use.

Moreover, when the cushion sheet for packaging of the present invention is used, it becomes a cushion material that transforms into a regular honeycomb structure by simply applying a tensile force, and has good workability and good appearance.

[Example 1] FIG. 1(A) is a plan view showing a packaging cushion sheet according to an embodiment of the present invention in a state before use, and FIG. 1(B) is a plan view showing a packaging cushion sheet in a used state. Figure, 2nd
Figure (A) is a sectional view taken along line II A-IT A of Figure 1 (A), Figure 2 CB) is a cross-sectional view of II B- of Figure 1 CB).
A sectional view taken along line IIB, and FIG. 3 is a plan view showing an enlarged main part of FIG. 1(B).

The cushion sheet IO is made of paper such as kraft paper, polyethylene film, foamed polyethylene, aluminum foil, etc., and has a slit portion (cut portion) 11 and The non-slit portions 12 and the non-slit portions 12 are alternately
A large number of linear slit rows 13 are formed in parallel over the entire surface. Here, in the cushion sheet 10, the length of the slit portion 11 is longer than the length p of the non-sleeved portion 12 (L43p in this embodiment), and the length of the slit portion 11 constituting one of the adjacent slit rows 13A is approximately The non-slit portion 12 constituting the other slit row 13B is located on the side of the center portion.

Note that the slit row 1 in the cushion sheet 10
The forming process No. 3 can be performed using a rotary cutter equipped with a blade portion corresponding to the slit portion 11, a press force 7, or the like.

Next, the operation of the above embodiment will be explained.

Before use, the cushion sheet 10 is made by grasping both ends of a flat sheet lO as shown in FIGS. When F is applied, this tensile force is transmitted through the non-slit portion 12 of the sheet 10 and spreads over the entire surface of the sheet 10, opening each slit portion 11 as shown in FIG. 1(B) and FIG. 2(B). At the same time, the sheet material around each slit portion 11 is bent and deformed so as to form a waveform in the extending direction of the slit rows 13. At this time, the sheet materials facing each other with each slit section 11 in between are arranged so that the waveforms formed by them are line-symmetrical with respect to the relationship between each slit section 11 being opened between the waveforms formed by them. Generate. As a result, as shown in FIG. 3, each slit portion 11
The surrounding sheet material is erected to form a honeycomb frame 14, and the entire flat sheet lO is transformed into a honeycomb structure. The sheet lO having a honeycomb structure has a certain thickness h (see FIG. 2 (B)) due to the rise of the honeycomb frame 14, and has shock absorbing properties due to the stiffness of the honeycomb frame 14, and is packaged with It can be used as a cushion material for

Therefore, when stored before use, the cushion seat 10 has a thin flat plate shape and can be stored, for example, in a stacked state, so that it is not bulky and has good storage properties.

Moreover, when the cushion sheet 10 is used, it becomes a cushion material that transforms into a regular honeycomb structure by simply applying a tensile force, and has good workability and aesthetic appearance.

In carrying out the present invention, the length ratio between the slit portion and the non-slit portion constituting the slit row is not necessarily limited to the aspect in the above embodiment.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide a packaging cushion sheet that is easy to store before use, has good workability during use, and has good appearance.

[Brief explanation of the drawing]

FIG. 1(A) is a plan view showing a packaging cushion sheet according to an embodiment of the present invention in a state before use; FIG. 1(B) is a plan view showing a packaging cushion sheet in a used state; Figure 2 (A) is a sectional view taken along line II A-■A in Figure 1 (A), and Figure 2 (B) is a cross-sectional view taken along line II A-II B in Figure 1 (B).
A sectional view taken along the line, and FIG. 3 is a plan view showing an enlarged main part of FIG. 1(B). IO...Cushion sheet, 11...Slit portion, 12...Non-slit portion, 13...Slit row. Agent Patent Attorney Osamu Shiokawa (A) Figure 1

Claims (1)

[Claims] (1) A packaging cushion sheet in which a large number of slit rows in which slit portions and non-slit portions are alternately provided substantially in a straight line are formed in parallel over the entire surface of the sheet, and the length of the slit portion is the non-slit portion. 1. A packaging cushion sheet configured such that a non-slit portion constituting the other slit row is located to the side of a slit portion constituting one adjacent slit row.