JP2012096819A - Packing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To well vent the air from the inside of a package when the package comprising a packed object packaged with a packing material is to be loaded, and also to prevent a swell or a curl from occurring along a periphery of a vent due to a pneumatic pressure from the vent.SOLUTION: The packing material 3 includes side face cover pieces 31 for covering four circumferential side faces of the packed object 2, long side folding pieces 32 folded inward from a long side crease 31a on both front and rear faces, and short side folding pieces 33 folded inward from a short side crease 31b on both front and rear faces, and has vents 35 on the short side folding pieces. The vent is formed at such a position where the long side folding piece overlaid on the short side folding piece covers a part thereof (20-40% in area ratio for example). The vent preferably has an irregular oval shape (Fig.3) which opens wider on a side of the short side crease.

Description

  The present invention relates to a packing material for packing a rectangular parallelepiped object.

  In order to facilitate transportation and storage, it has been conventionally used to pack a plurality of rectangular plate products such as flooring with a packing material in a state of being stacked, and bind with a binding band to form a package. For example, Patent Document 1 discloses a package that is packed with a packing material in a state in which at least a central portion of the upper surface of the plate-shaped product is exposed, and is bundled with a binding band. What formed the rectangular vent in the position inside the edge part of a curved part is disclosed. According to the description in Patent Document 1, when the packing body is stacked at the time of unloading work, the air inside the packing body can be escaped from the vent, so that the packing material is prevented from being broken or the binding band is damaged. It is supposed to be possible.

JP-A-9-58746

  When you try to load a package and stack it by throwing another package on top of one package that has already been unloaded, the air inside the package (especially the side of the package and this The air that has entered between the package surrounding the package and the air that has entered from the exposed portions of the front and back of the package is expelled from the vents. For this reason, the packing material in the vicinity of the peripheral edge of the vent hole may be swollen by being pressed by the pressure of air that is about to escape from the inside of the packing body, and the packing material may be displaced to loosen or come off the package. Further, the peripheral edge of the air vent may be swung up by being pushed by the pressure of the air that is about to escape. There was a case where the packing material was torn by being caught by the raised vent periphery.

  Therefore, the problem to be solved by the present invention is to prevent the packaging material from being torn and the binding band from being damaged during the packaging operation by forming a ventilation hole in the packaging material to release air from inside the packaging material. While eliminating the disadvantages of the above-mentioned conventional technology while suppressing the occurrence of blistering and stagnation in the packing material at the periphery of the vent, It is an object of the present invention to provide a new configuration of a packaging material that prevents the packaging material from being caught and prevents the packaging material from being broken more effectively.

  In order to solve this problem, the present invention according to claim 1 is a packing material for packing a packaged object having a rectangular parallelepiped shape, and includes a side surface covering piece that covers the four circumferential side surfaces of the packaged object, and the front and back sides of the packaged object. The long side bent pieces that are bent inward from the pair of long side bent edges of the side covering pieces on both sides, and the inner sides of the pair of short side bent edges of the side covering pieces on the front and back surfaces of the packaged item, respectively. Short side folded pieces that are folded in the direction, and the long side folded pieces are folded on the short side folded pieces at the corners of the four corners on at least one of the front and back surfaces of the packaged item. The vent is formed in the short side bent piece at a position where a part thereof is covered with the long side bent piece folded on the short side bent piece.

  According to a second aspect of the present invention, in the packaging material according to the first aspect, the vent is drawn on the side of the short side bent edge of the long axis that is substantially parallel to the length direction of the short side bent piece. The first arc edge and the second arc edge drawn on the other side of the long axis, and the first arc edge has a deformed elliptical shape having a larger diameter than the second arc edge. It is characterized by.

  According to the first aspect of the present invention, the vent is provided in the short side bent piece located below the two bent pieces of the long side bent piece and the short side bent piece folded at the corner. Formed, and a part of the vent is formed at a position where it is covered or closed by the long side bent piece. Even if the packing material is swelled or swollen, the long side bent piece provided so as to cover a part of the vent works to suppress this. Also, because the vents formed in the short side folded pieces are at a position lower than the long side folded pieces by the thickness, when another package is slid and stacked on this package In addition, since the other packing body slides while dragging on the uppermost level of the lower packing body, that is, on the long side bent piece, a vent is formed at a portion not covered with the long side bent piece. Even if a slight bulge or swell occurs at the periphery of the sword, it is suppressed from being caught by the swell or swell. Through these, breakage of the packing material can be effectively prevented.

  Also, when stacking the package body by throwing it away, the air inside the package body and the air entering from the exposed parts on the front and back of the package body are directed toward the peripheral edge and corners of the package body in search of escape places. However, when the shape of the vent hole is set as described in claim 2, the vent hole opens wide on the side of the short side bent edge, so that it tends to move toward the peripheral edge or the corner. The air can be smoothly discharged from the vent, and the effect of preventing the packing material near the vent from being warped or swollen, and further the damage of the packing material at the corners becomes even more remarkable.

It is a perspective view which shows the packing material by one Embodiment of this invention, and a package obtained using this. It is FIG. 1A-A sectional drawing of this package. It is a fragmentary top view which shows the vent hole formation part of this package. It is a chart which shows the comparison data about the shape of a vent. It is a chart which shows another comparison data about the shape of a vent.

  First, the configuration of the present invention will be described generally. The present invention is a packing material 3 for packing a plurality of rectangular plate-like products, for example, a rectangular parallelepiped packaged object 2 such as a flooring laminate, and this is bound by a binding band 4 at regular intervals. A package 1 obtained by bundling is shown in FIGS. 1 and 2. Although the size of the package 1 varies depending on the dimensions of the rectangular plate-shaped product 2 to be packed, generally, the long length: 1500 to 2500 mm, the short length: 300 to 650 mm, and the height (thickness): 30 to 180 mm. Have the dimensions of

  The packing material 3 is a length that is bent inward from a side surface covering piece 31 that covers the four circumferential sides of the object to be packed 2 and a pair of long side bent edges 31a of the side surface covering piece 31 on both the front and back surfaces of the object to be packed 2. The length side bent piece 32 and the short side bent piece 33 which is bent inward from the pair of short side bent edges 31b of the side surface covering piece 31 on both the front and back surfaces of the article to be packed 2 are provided. The thickness of the packaging material 3 is generally 2 to 5 mm. Further, the bending length at which the long side bent piece 32 is bent from the long side bent edge 31 a of the side surface covering piece 31, and the short side bent piece 33 is the short side bent edge 31 b of the side surface covering piece 31. In general, the bending length of each of the items to be bent is 20 to 100 mm, and the open and closed portions 34 that are not covered with the long side bent piece 32 and the short side bent piece 33 are provided on both the front and back surfaces of the article 2 to be packed. The front and back surfaces of the article to be packed 2 are exposed at the open portion 34.

  On the front and back surfaces of the article to be packaged 2, at the corners of the four corners, the long side bent piece 32 is folded on the short side bent piece 33, and the short side located below the corner part A vent hole 35 is formed in the bent piece 33. The vent hole 35 has a long horizontally long shape in the length direction of the short side bent piece 33 (short length direction of the packing body 1), and the longest length in the horizontal direction is preferably 20 to 40 mm. If this is smaller than 20 mm, air escape during loading worsens, and breakage and cracks are likely to occur in the corners of the packing material 3, and if it is larger than 40 mm, the area ratio occupied by the vent 35 becomes too large. The strength of the packing material 3 is reduced. Moreover, it is preferable that the longitudinal direction longest length of the vent hole 35 is 10-20 mm. If this is smaller than 10 mm, air escape during loading worsens, and the corners and the like of the packing material 3 are likely to be damaged or cracked. If larger than 20 mm, the area ratio occupied by the vent 35 becomes too large. The strength of the packing material 3 is reduced.

  The shape of the vent 35 is a deformed ellipse in which the peripheral edge on the short bent edge 31b side is formed by an arc edge 35a having a large diameter r1, and the peripheral edge on the opposite side is formed by an arc edge 35b having a small diameter r2 (<r1). The shape is most preferable, and r1 = 20 to 40 mm and r2 = 10 to 20 mm are preferable. Moreover, it is preferable that the area ratio by which the vent hole 35 is covered with the elongate side bending piece 32 is 20 to 40%. These will be described in detail with reference to FIG. 3 and FIG.

  Moreover, it is preferable that the distance c (FIG. 3) between the ventilation port 35 and the short side bending edge 31b shall be 5-10 mm. If this distance is less than 5 mm, it becomes difficult to bend the short side bent piece 33 at this portion, and the short side bent piece 33 that has been lifted up by insufficient bending hits the long side bent piece 32, and this portion. Causes the load balance of the package 1 to be lost, and if it exceeds 10 mm, the air vent 35 will be located away from the short side bent edge 31b, so air leakage during loading will worsen and Damage or cracks are likely to occur at the corners of the material 3.

  Hereinafter, the present invention will be described in detail with reference to examples. However, the present invention is not limited to the examples, and various modifications may be made within the scope of the invention defined by the description of the scope of claims. Needless to say you get.

  A packing material 3 according to an embodiment of the present invention and a packing body 1 obtained using the packing material 3 will be described in detail with reference to FIGS. 1 to 3. The packaging body 1 according to this embodiment is formed by packing a flooring laminate in which six flooring materials having a long length of 2186 mm, a short length of 316 mm, and a thickness of 78 mm are laminated with the packaging material 3 as an object to be packaged 2. It is configured by binding with a binding band 4 at intervals.

  The packing material 3 includes a pair of long side covering pieces 31 that surround the four side surfaces (ie, the end face) of the article to be packed 2 that is a laminate of six flooring materials, and the side covering pieces 31 on both the front and back sides of the article to be packed 2. The long side bent piece 32 bent inward from the long side bent edge 31a and the pair of short side bent edges 31b of the side surface covering piece 31 are bent inward on both the front and back surfaces of the article 2 to be packed. A short side bent piece 33. And the side surface of the to-be-packaged object 2 is made into the state enclosed by the side surface covering piece 31, and the long side bending piece 32 is bent inward along the long side bending edge 31a in the front and back both surfaces, and short side After the short side bent piece 33 is bent inward along the bent edge 31b and packed along both the front and back surfaces of the flooring 2, the bundle 1 is obtained by binding with the binding band 4. At the corners of the four corners of the front and back surfaces of the article 2 to be packed, the long bent piece 32 is folded on the short bent piece 33 (FIGS. 1 and 2).

  In this embodiment, the thickness of the packaging material 3 is 3 mm, and both the long side bent piece 32 and the short side bent piece 33 have a bent length of 49 mm. Therefore, the front and back surfaces of the flooring material are left on both the front and back surfaces of the article 2 to be packaged, and the open portions 34 that are not covered by the long side bent pieces 32 and the short side bent pieces 33 remain. Is exposed.

  The short side bent piece 33 is formed with one vent hole 35 near both ends in the length direction (the short length direction of the packing body 1). When the long side bent piece 32 is folded on the short side bent piece 33 at the four corners on the front and back surfaces of the article 2 as described above, A part of 35 is formed at a position covered or closed by the long side bent piece 32. In this embodiment, as shown in FIG. 3, the shape of the vent 35 is a first in which the diameter drawn on one side of the long axis substantially parallel to the length direction of the short side bent piece 33 is r1. It has a deformed elliptical shape composed of an arc edge 35a and a second arc edge 35b with the diameter drawn on the other side of the long axis as r2 (<r1), and the first is on the short side bent edge 31b side. The arc edge 35a is positioned.

The inventor made various examples of the shape and position of the vent 35 and tested them. First, the following four shapes were used as test objects as vent shapes. It should be noted that the major axis length b of the vent 35 is 30 mm, and the distance c = 8 mm from the short side bent edge 31 a of the side surface covering piece 31 of the packing material 3 to the vent 35 is common to the test objects A to D. did.
A: The modified elliptical vent hole 35 shown in FIG. 3 was formed such that the first arc edge 35a was positioned on the short side bent edge 31b side.
B: A rectangular vent was formed so that its long side was positioned on the short side bent edge 31b side.
C: A semicircular vent was formed so that a straight line with a diameter thereof was located on the side of the short bent edge 31b.
D: An elliptical vent was formed so that its long axis was parallel to the short bent edge 31b.

  With respect to these test objects, 11 types of packing bodies were produced by changing the area of the vent hole covered by the long side bent piece 32 by 10% in the range of 0 to 100% and changing the vent hole formation position. Then, it was dropped 5 times from a height of 100 cm, and the state of air escape was visually evaluated, and the presence or absence of a shape change such as swelling, sag, or crack of the packing material 3 at the periphery of the vent was visually evaluated. These results are shown in FIG.

  For the vent shape A, even when the vent cover ratio is as small as 0% (when the bent leading edge of the long side bent piece 32 does not reach the vent 35) and as small as 10% Although the packaging material 3 was not damaged or bulged by the air pressure, the peripheral edge of the vent hole 35, particularly the first arc edge 35 a located on the side of the short bent edge 31 b undulates. As shown in FIG. On the other hand, when the vent hole covering ratio was 50%, it was observed that the corners of the packing material 3 were swollen by being pushed by the air inside the packing body 1 at the time of a drop collision. This tendency becomes more prominent when the vent hole covering ratio is further increased, and when the ratio is 60 to 100%, corners are sometimes broken. On the other hand, when the vent cover ratio is set to 20 to 40%, no change is observed in the shape of the packing material 3 even by a drop collision, and it has been confirmed that air is vented well from the vent 35. It was. In addition, the shape of the peripheral edge of the vent hole was maintained well, and the packing material corners were not swollen or damaged.

  For the vent shape B, when the vent cover ratio was 0% and 10%, the packing material 3 was not damaged or swollen by the air pressure at the time of the drop collision. The rectangular corner was cracked, the packing material 3 was torn, and the long side on the short side bent edge 31b side was rolled up. In the case where the ventilation port covering ratio was 20%, no change was observed in the shape of the packing material 3 even by a drop collision, and it was confirmed that the air escape from the ventilation port 35 was performed well. Moreover, although the long side by the side of the short side bending edge 31b side of the ventilation hole part exposed without being covered with the long side bending piece 32 and the edge of the packing material 3 swelled up somewhat, the packaging is removed. There was no such thing. On the other hand, when the vent hole covering ratio was 50% or more, there was a case where the corner of the packing material 3 was swollen or damaged by being pushed by the air inside the packing body 1 at the time of dropping collision. On the other hand, when the vent cover ratio is set to 30 to 40%, no change was observed in the shape of the packing material 3 due to a drop collision, and it was confirmed that air venting from the vent 35 was performed well. It was done. In addition, the shape of the peripheral edge of the vent hole was maintained well, and the packing material corners were not swollen or damaged.

  The results for the vent shape C were almost the same as in Example 2. That is, when the vent cover ratio is 0% and 10%, the packing material 3 was not damaged or bulged by the air pressure at the time of the drop collision, but the semicircular vent Some corners formed by the diameter and the arc are cracked, and the long side on the short side bent edge 31b is rolled up. In the case where the vent cover ratio was 20%, it was confirmed that the shape of the packing material 3 was not changed even by a drop collision, and that the air vent from the vent 35 was satisfactorily performed. Although some wavy bulges are seen at the corners of the straight side or arc on the short side bent edge 31b side of the vent that is exposed without being covered by the side bent piece 32, the packaging may come off. It never happened. On the other hand, when the vent hole covering ratio was 50% or more, there was a case where the corner of the packing material 3 was swollen or damaged by being pushed by the air inside the packing body 1 at the time of dropping collision. On the other hand, when the vent cover ratio is set to 30 to 40%, no change was observed in the shape of the packing material 3 due to a drop collision, and it was confirmed that air venting from the vent 35 was performed well. It was done. In addition, the shape of the peripheral edge of the vent hole was maintained well, and the packing material corners were not swollen or damaged.

  As for the vent hole shape D, when the vent hole is formed at a position where it is not blocked by the long side bent piece 32 (covering ratio 0%), the air is well removed and the corners of the packing material 3 are Although it was not torn or swelled, a long-diameter elliptical arc edge or a long-side bent piece 32 positioned on the periphery of the vent, particularly on the side of the short-side bent edge 31b, by the pressure when air passes through the vent. Swelling occurred at the inner short elliptical arc edge that was not blocked by. When the air vent covering ratio was 10%, the air escape was similarly good, and no particular shape change was observed in the packing material 3, but the short side bent edge 31b was caused by the pressure when air passed through the air vent. Some of the long-diameter elliptical arc edges located on the inner side and the inner short-diameter elliptical arc edges that are not blocked by the long side bent pieces 32 bulge. In the case where the vent cover ratio is 20%, the air escape is similarly good, and the shape of the packing material is not particularly changed, and the long-diameter elliptical arc edge or the long edge located on the short side bent edge 31b side is also used. Although a slight wavy bulge was seen on the inner short-diameter elliptical arc edge that was not blocked by the shank-side bent piece 32, it did not cause tearing or twisting, and the package did not come off. . On the other hand, when the vent hole covering ratio was 50% or more, there was a case where the corner of the packing material 3 was swollen or damaged by being pushed by the air inside the packing body 1 at the time of dropping collision. On the other hand, when the vent hole cover ratio is 30 to 40%, no change in shape is observed in the packing material 3 due to a drop collision, and it is confirmed that the air vent from the vent hole 35 is satisfactorily performed. It was. In addition, the shape of the peripheral edge of the vent hole was maintained well, and the packing material corners were not swollen or damaged.

  From the above, it is preferable that the area ratio of the vent hole 35 covered with the long side bent piece 32 is 20 to 40% regardless of the vent hole shape. Even when thrown and stacked, air vents from the vent hole 35 can be satisfactorily performed, and damage and cracks at the corners of the packing material 3 can be prevented. It was proved that the effect of suppressing the effect can be obtained. When the peripheral edge of the vent 35 swells, the package is displaced and loosened by that amount. In the worst case, the package may come off, but the occurrence of such problems is prevented by suppressing the swell. can do. Also, if the peripheral edge of the vent hole 35 rises, there is a risk that the peripheral edge will be caught when another package is slid on it, and the packing material may be torn from the hooked part. Occurrence of such defects can be prevented by suppressing the above.

  About the shape of the vent hole 35, the shape of A employ | adopted by this embodiment is especially preferable. In the case of a shape having a sharp corner on the inner periphery of the vent, such as B and C, when pressure is applied to the periphery of the vent by air that tries to escape from the vent, a bulge or a crack near the corner Is likely to occur. Further, when the vent hole shape A having a modified elliptical shape is compared with the vent hole shape D having an elliptical shape, when the vent hole covering ratio is 20%, the shape of the D shape is located on the short bent edge 31b side. A slight wavy bulge was seen on the peripheral edge, but the A-shaped one did not bulge or swell at all even on the peripheral edge (first arc edge 35a) located on the short bent edge 31b side. . This is because the air inside the packing body (air existing between the side surface of the article 2 to be packed and the side surface covering piece 31 of the packing material 3) flowed up and down (thickness direction) vigorously when the packing body was loaded. Since the air is then discharged from the vent 35, the portion of the periphery of the vent that is closest to the side surface covering piece 31, that is, the peripheral portion on the short side bent edge 31b side, is most susceptible to air resistance. Comparing vent hole shapes A and D, in the case of A, the peripheral edge portion (first arc edge 35a) on the short side bent edge 31b side is larger than the peripheral edge portion (second arc edge 35b) on the opposite side. In contrast to the diameter, in the case of D, the short side bent edge 31b side and the opposite side have a target peripheral shape. Accordingly, when the vent holes having these shapes are formed with the same major axis length (b), A is larger than D on the short side bent edge 31b side. This is considered to work significantly in improving the air escape during loading and more effectively suppressing the bulging and swelling of the peripheral edge of the vent on the short bent edge 31b side.

In order to further confirm this, the following test was conducted. In addition to the shapes A and D, the shape of E shown below was used as the test object as the vent shape. Similarly to the above-described test, for the vent hole shape E, the length (b) = 30 mm of the long axis of the vent hole 35, and the distance from the short side bent edge 31a of the side surface covering piece 31 of the packing material 3 to the vent hole 35. (C) = 8 mm, common to shapes A and D. Moreover, the vent hole covering ratio covered by the bent tip region of the length (a) of the long side bent piece 32 is 20% and common. In the same manner as in the above-described test, the packaging body obtained by the packaging materials of these vent hole shapes A, D, and E was freely dropped five times from a height of 100 cm, and the peripheral edge on the short bent edge 31a side of the vent hole The presence or absence of a shape change such as swelling, sag, or crack of the packing material 3 was visually evaluated at the periphery on the opposite side. The result is shown in FIG.
E: A deformed elliptical vent 35 that is substantially the same as shown in FIG. 3 is formed so that its second arc edge 35b is positioned on the side of the short bent edge 31b in the opposite direction to the shape A. .

  The test results for the vent shapes A and D are as described above. In the case of the vent shape A, the shape of the packing material 3 is caused by a drop collision on the peripheral edge (first arc edge 35a) on the short side bent edge 31a side or on the opposite peripheral edge (second arc edge 35b). In the case of the vent hole shape D, a slight wavy bulge is seen in the long-diameter elliptical arc edge located on the short side bent edge 31b side. However, it did not cause tearing or drowning, and the packaging did not come off. On the other hand, in the case of the vent shape E as a new test object, swelling occurred at the peripheral edges on both sides. As a result, the deformed oval vent 35 is formed so that the peripheral edge (first arc edge 35a) on the short bent edge 31a side has a larger diameter than the peripheral edge (second arc edge 35b) on the opposite side. It was confirmed that the shape of the vent hole 35 can be favorably maintained without forming a bulge or a stagnation by the air jetted from the vent hole 35 vigorously.

  In the illustrated embodiment, vent holes 35 are formed near both ends in the length direction of the short side bent piece 33 on both the front and back surfaces of the packing body 1, and the long side bent portion is folded on the short side bent piece 33. Although a part 32 of the vent hole 35 is covered or closed by the piece 32, the present invention is not limited to this. For example, the vent holes 35 are formed in the vicinity of both ends in the length direction of the short side bent piece 33 on either one of the front and back surfaces of the package 1, and a part of the vent holes 35 is folded on the short side bent piece 33. It may be covered or closed by the long side bent piece 32. In this case, on the surface where the vent hole 35 is not formed in the short side bent piece 33, the folded state of the long side bent piece 32 and the short side bent piece 33 is not limited. Similarly to the surface, the long side bent piece 32 may be folded on the short side bent piece 33, or the short side bent piece 33 on the long side bent piece 32. May be folded, or the ends of these bent pieces may be cut so that folding does not occur. Further, one vent hole 35 may be formed near one end in the length direction of the short side bent piece 33, and a part thereof may be covered or closed by the long side bent piece 32. These variations are also within the scope of the present invention.

1 Packing body 2 Box-shaped packaged object (floor laminate)
DESCRIPTION OF SYMBOLS 3 Packing material 31 Side surface covering piece 31a Long side bending edge 31b Short side bending edge 32 Long side bending piece 33 Short side bending piece 34 Open part 35 Vent 35a 1st circular arc edge 35b 2nd circular arc Edge 4 Cable tie

Claims (2)

It is a packing material for packing an object to be packed having a rectangular parallelepiped shape, and includes a side surface covering piece that covers the four circumferential side surfaces of the object to be packed, and a pair of long side bent edges of the side surface covering piece on both front and back surfaces It consists of a long side bent piece that is bent inward, and a short side bent piece that is bent inward from a pair of short side bent edges of the side covering pieces on both the front and back sides of the packed object. The long side folded piece is folded on the short side folded piece at the corners of the four corners on at least one side of the front and back of the long side folded on the short side folded piece A packing material, wherein a vent is formed in a short side bent piece at a position where a part thereof is covered with the bent piece. The vent is formed with a first arc edge drawn on the side of the short side bent edge of the long axis that is substantially parallel to the length direction of the short side bent piece, and on the other side of the long axis. The packing material according to claim 1, wherein the packing material has a deformed elliptical shape having two arc edges, and the first arc edge has a larger diameter than the second arc edge.

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