JP3438141B2 - Cushioning material for packaging - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning material for packaging which is interposed, for example, in a corrugated cardboard box between a corner portion of the corrugated cardboard box and a ridgeline portion of a packaged object.

[0002]

2. Description of the Related Art Conventionally, as this type of cushioning material, as shown in FIG. 7 , the whole is made up of a tubular body (50) formed of laminated paper and having an L-shaped cross section. Is a first component part (51) having an L-shaped cross section which is in surface contact with these walls straddling two walls sandwiching the entry corner of the container (C), and a gap between the first component part (51) and A second component portion (52) having an L-shaped cross section, which is disposed at a distance and which is in surface contact with these faces across two faces that sandwich the ridge line portion of the article to be packaged (S); It consists of two connecting parts (53) (54) that connect the side edges of 51) (52),
Both the connecting portions (53) (54) are formed in a straight cross section, and the two wall portions (5) of the both constituting portions (51) (52) are respectively formed.
It is known that they form a right angle with 1A, 52A, 51B and 52B (see Japanese Utility Model Publication No. 55-33096).

[0003]

However, the conventional cushioning material has the following problems. That is, when a force as shown by an arrow in FIG. 7 acts on the object to be packaged and an impact force is applied to the cushioning material, the tubular body (50) is deformed as shown by a chain double-dashed line in FIG. The impact resistance is mitigated by the deformation resistance. However, in the tubular body (50), a portion in which the upward wall portion (51A) of the first component portion (51) and the connecting portion (53) are connected,
And the part where the rightward wall part (52B) of the second component part (52) and the connecting part (54) are connected to each other is deformed into an acute angle, but the degree of this deformation is large, or such a deformation occurs. When it is repeated, cracks and cracks occur on the outer surface of this deformed portion. As a result, the restoring force of the tubular body is impaired, and thus the function as a cushioning material is impaired.

An object of the present invention is to provide a cushioning material for packaging which solves the above problems.

[0005]

According to a first aspect of the present invention, there is provided a cushioning material for packaging, which is entirely made of a tubular body formed of paper and having a substantially L-shaped cross section. The tubular body has a substantially L-shaped cross section. A first component having a shape of L and a second component having a substantially L-shaped cross section along two surfaces which are arranged at a distance from the first component and which are sandwiched between the ridges of the article to be packaged; The first connecting portion and the second connecting portion are formed of two connecting portions that connect the side edges of the constituent portions, and two connecting portions that connect the side edges of the first and second constituent portions are arcuate in cross section. At a position facing the constituent portion, a rib protruding toward the other constituent portion is formed on at least one of the first constituent portion and the second constituent portion, and the rib has a cross section of an arc-shaped connecting portion. The ribs are continuous. According to a second aspect of the present invention, in the packaging cushioning material according to the first aspect of the invention, the connecting portion of the two wall portions of the first component portion has an arc-shaped cross section, and the rib is formed on the first component portion. The connecting portion and the rib are continuous.

The cushioning material for packaging according to the third aspect of the present invention is entirely made of a tubular body made of paper and having a substantially L-shaped cross section.
The tubular body is substantially L-shaped in cross section, and the first cross-section is substantially L-shaped, and the cross section is substantially L along the two planes which are arranged at a distance from the first cross section and which sandwich the ridge of the package. A second component part of the shape and two connecting parts that connect the side edges of both component parts, and the two connecting parts that connect the side edges of the first and second component parts are arcuate in cross section. And the connecting portion of the two wall portions in the first component portion is formed in an arcuate cross section, and at the position where the first component portion and the second component portion face each other, the first component portion and the second component portion side the collision <br/> rib out is formed, in which cross section arcuate connecting portion and the ribs are continuous.

[0007]

When the impact force is applied to the wall portion of the second component portion which is connected by the arc-shaped connecting portion of the cross-section, the wall portion of the first component portion facing the wall portion of the second component portion has an arc-shaped connecting portion of the cross-section. Acts like a hinge and is deformed, and this deformation resistance relieves the impact force. Moreover, since the cross-sectional shape of the connecting portion is arcuate, cracks or cracks are unlikely to occur on the outer surface during the above deformation, and the resilience is less likely to be impaired.

Further, at a position where the first constituent portion and the second constituent portion face each other, at least one of the first constituent portion and the second constituent portion has a rib protruding toward the other constituent portion. Cross section Arc-shaped connection or cross section
If it is formed continuously with the arc-shaped connecting part, when an impact force is applied to the cushioning material, the tubular body is deformed and the rib abuts on the other component part, and as a result, the rib functions to connect the connecting part. Is prevented from collapsing. Therefore, it can withstand a larger impact force.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the upper and lower sides and left and right sides of each drawing are referred to as upper and lower sides and left and right sides, respectively. Note that the same parts are denoted by the same reference symbols throughout the drawings, and description thereof will be omitted.

FIG. 1 shows a cushioning material according to the first embodiment of the present invention.

In FIG. 1, the entire cushioning material for packaging is
It is composed of a tubular body (10) made of paper and having a substantially L-shaped cross section.
As the paper, for example, recycled paper is used . Tubular (10)
Is a first component part having a substantially L-shaped cross section, which extends across two walls facing upward and right facing the entry corner of the container (C).
(2) and a first section (2) with a space between them, and having a substantially L-shaped cross section along the two surfaces facing upward and right facing the ridge of the object to be packaged (S). Second component (3)
And two connecting portions (4) and (5) having an arcuate cross section for connecting the upper edges and the right edges of both constituent portions (2) and (3).

A rib (11) having a trapezoidal cross section protruding inward is formed on each of two upwardly and rightwardly facing wall portions (2A) (2B) of the first component portion (2) of the tubular body (10). As shown in FIG. 1, it is formed continuously with the connecting portions (4) and (5) having an arcuate cross section. Also, the upward wall portion (2A) and the rightward wall portion (2) of the first component portion (2)
The connecting portion (6 ) with B) has an arcuate cross section. As is apparent from FIG. 1, this connecting portion (6) is also continuous with the rib (11). The cushioning material composed of such a tubular body (1),
Inside of the packaging container (C), the corner of the container (C) and the object to be packaged
It is used by interposing it with the ridge of (S). A force is applied to the object to be packaged (S) as shown by the arrow in Fig. 1 to form a cylindrical body.
When an impact force is applied to (1), the cylindrical body (1) is deformed as shown by a two-dot chain line in the figure, and the impact force is alleviated by this deformation resistance. At this time, the connecting parts (4) and (5) having an arcuate cross section act like hinges, the upper connecting part (4) is deformed to open, and the right connecting part (5) is closed. Deform. Since the cross-sectional shape of the connecting portion (4) (5) is an arc,
Even if the degree of deformation is large, or even if such deformation is repeated, cracks or splits are less likely to occur on the outer surfaces of the connecting portions (4) and (5), and the restorability is less likely to be impaired. Moreover, when the tubular body (10) is deformed as shown by the chain double-dashed line in FIG.
The rightward wall portion (3B) of the constituent portion (3) abuts the rib (11) of the rightward wall portion (2B) of the first constituent portion (2). As a result, ribs
The function of (11) prevents the connecting portion (5) from being crushed and can withstand a large impact force. Therefore, the function as a cushioning material is also maintained for a long time.

The cushioning material composed of such a tubular body (10) is
For example, the first constituent part (2) and the second constituent part (3) each having an arcuate portion on both side edges are made in advance so that both constituent parts (2) and (3) overlap each other. It is manufactured by combining and bonding the arc-shaped portions. In this case, since the connecting portions (4) and (5) having an arcuate cross section of the finished tubular body (10) have a double structure, the strength is increased and the above-mentioned effect is further enhanced . FIG. 2 shows a cushioning material according to the second embodiment of the present invention.

In FIG. 2, the first component of the cylindrical body (13)
Ribs (14) having an arcuate cross section projecting inwardly are respectively formed on the two wall portions (2A) and (2B) of (2), and the connecting section (4) having an arc cross section
(5) and contiguous with the formed continuously upward wall portion and (2A) right wall portion and (2B) cross section arcuate connecting portion (6) Tei
It

The function of the cushioning material composed of the cylindrical body (13) is the same as that of the first embodiment.

FIG. 3 shows a cushioning material according to the third embodiment of the present invention.

In FIG. 3, the second component of the tubular body (15)
(3) Upward wall (3A) upper edge and rightward wall
The right side edge of (3B) is provided with inclined portions (16) and (17) that are inclined toward the first component portion (2) side, and the tips thereof are cross-section arcuate connecting portions (4) (5). ). Also, FIG.
As is apparent from the above, the ribs (11) and the cross-section arc-shaped connecting portion (6) of the two wall portions (2A) and (2B) of the first component portion (2) are continuously formed.

FIG. 4 shows a cushioning material according to the fourth embodiment of the present invention.

In FIG. 4, the second component of the tubular body (18)
(3) Both wall portions (3A) and (3B) respectively project inward and the tips are connected to both wall portions (2A) and (2B) of the first component member (2) in an arcuate cross section (4) A rib (19) having an arcuate cross section is in contact with a rib (11) having a trapezoidal cross section formed continuously with (5). As is clear from FIG. 4, the first component part
(2) Connecting part (6) between the upward facing wall (2A) and the rightward facing wall (2B )
Has an arcuate cross section and is continuous with the rib (11).

FIG. 5 shows a cushioning material according to the fifth embodiment of the present invention.

In FIG. 5, the rightward wall portions (21B) and (22B) of the first and second constituent portions (21) and (22) of the tubular body (20) are respectively upward wall portions (21A) and (22A). A plurality of ribs (11) having a trapezoidal cross section protruding inward are formed on the right wall portion (21B) of the first component portion (21) at a widthwise interval. There is. Also, the upward wall of the first component part (21)
A rib (14) having a circular cross-section is formed at the center of the width of (21A), the rib protruding inward and having a tip abutting against the upward wall (22A) of the second component portion (22). . In addition, the first component (2
1) Connecting part between the upward wall (21A) and the right wall (21B)
(6) has an arcuate cross section. In this cushioning material, as is apparent from FIG. 5, the right rib (11) is continuous with the connecting portion (5) of the first and second component portions (21) and (22), and the left rib (11) is two wall portions of the first component (21) (2
It is continuous with the connecting part (6 ) of 1A) and 21B . This tubular body (1
According to the cushioning material composed of 8), the effect of preventing the crushing of the connecting portions (4) and (5) in the operation of the first embodiment is further increased. Therefore, it can withstand a larger impact force.

FIG. 6 shows a cushioning material according to the sixth embodiment of the present invention.

In FIG. 6, the first component of the tubular body (23)
The upward wall portion (21A) of the (21) is provided with a rib (11) having a trapezoidal transverse cross section and protruding inward. Also, the wall facing right
In (21B), ribs (24) with a trapezoidal cross-section protruding inward,
It is formed over almost the entire width. On the other hand, the rib (2) of the rightward wall portion (21B) of the first component portion (21) that protrudes inward and has the tip on the rightward wall portion (22B) of the second component portion (22).
A plurality of ribs (19) having a circular cross-section that are in contact with 4) are formed at intervals in the width direction.

In this cushioning material, as is apparent from FIG. 6, the ribs (11) (24) have the first and second component parts (21) (2).
2) in the connecting part (4) (5) and the first component part (21)
It is continuous with the connecting portion (6) of the wall portions (21A) and (21B) . The function of the cushioning material having the cylindrical body (23) is similar to that of the fifth embodiment.

[0025]

As described above, according to the cushioning material for packaging of the present invention, since the cross-sectional shape of the connecting portion is arcuate,
At the time of the above deformation, cracks and fractures are unlikely to occur on the outer surface,
Restorability is not easily impaired. Therefore, the buffering effect is maintained for a long time.

[Brief description of drawings]

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

FIG. 2 is a cross sectional view showing a second embodiment of the present invention.

FIG. 3 is a cross sectional view showing a third embodiment of the present invention.

FIG. 4 is a cross sectional view showing a fourth embodiment of the present invention.

FIG. 5 is a transverse sectional view showing a fifth embodiment of the present invention.

FIG. 6 is a transverse sectional view showing a sixth embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

2 1st component part 3 2nd component part 4 Connection part 5 Connection part 6 Connection part 10 Cylindrical body 11 Rib 13 Cylindrical body 14 Rib 15 Cylindrical body 18 Cylindrical body 19 Rib 20 Cylindrical body 21 1st structural part 22 second component 23 the cylindrical body 24 Li Bed

─────────────────────────────────────────────────── ───Continued from the front page (56) References: Showa 50-118271 (JP, U) Showa 61-164167 (JP, U) Showa 58-102473 (JP, U) Showa 49- 100974 (JP, U) Actually developed 51-93769 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65D 81/00

Claims (3)

(57) [Claims] 1. A tubular body having a substantially L-shaped cross section and formed of paper. The tubular body has a first constituent portion having a substantially L-shaped cross section and a space between the first constituent portion and the first constituent portion. A second component part having a substantially L-shaped cross section and extending over two surfaces that are arranged along the ridge of the packaged object, and two connecting parts that connect the side edges of both component parts. , The two connecting portions connecting the side edges of the first and second constituent portions are arcuate in cross section, and the first and second constituent portions are arranged at the positions where the first and second constituent portions face each other. A cushioning material for packaging in which at least one of the constituent parts is formed with a rib protruding toward the other constituent part, and the connecting part and the rib having a circular cross section are continuous. 2. The connecting portion of the two wall portions in the first component portion has an arcuate cross section, and the rib is formed in the first component portion.
The cushioning material for packaging according to claim 1, wherein the cushioning material is formed and the connecting portion and the rib are continuous. 3. The whole is made of a tubular body formed of paper and having a substantially L-shaped cross section, and the tubular body is spaced apart from the first constituent portion having a substantially L-shaped cross section and the first constituent portion. A second component part having a substantially L-shaped cross section and extending over two surfaces that are arranged along the ridge of the packaged object, and two connecting parts that connect the side edges of both component parts. , Two connecting portions that connect the side edges of the first and second constituent parts are arcuate in cross section, and a connecting part of the two wall portions in the first constituent part is arcuate in cross section, At the position where the constituent portion and the second constituent portion face each other ,
2 A cushioning material for packaging, in which ribs protruding toward the two constituent parts are formed and the arc-shaped connecting portion in cross section and the rib are continuous.