JP3778767B2 - Partition plate for packaging goods - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, when packaging goods such as canned foods and cans, or canned beer or juice in a packaging box such as corrugated cardboard and packaging them as gifts, A partition plate made of a synthetic resin sheet for partitioning and fixing so as not to collide or be displaced inside, particularly a polyethylene terephthalate resin (PET) sheet material or a sheet material made of recycled PET resin. The present invention relates to a partition plate for packaging an article formed by using the same.
[0002]
[Prior art]
Conventionally, in order to package several small items such as canned goods together, a plurality of items are accommodated in a packaging box in an aligned manner, and the items accommodated at that time move within the packaging box. Each article is packaged in a fixed state by using a partition in order to fix it so as not to be deformed by collision, cracking, or being displaced.
In order to fix the articles one by one in this way, a method is generally adopted in which the articles are stored and packaged in the storage recesses partitioned by the partition body mounted in the box.
[0003]
In general, as a partition body used for packaging an article in the above-described state, a partition plate in which a storage recess is formed using corrugated cardboard, or sawdust, cotton-like or crushed pieces A method of packaging the article after fixing the article so that it does not move using a partition material in which a storage part is formed using a cushioning material or the like has been frequently used.
In order to wrap an article using a partition board made of corrugated cardboard as in the former case, as described in Japanese Utility Model Publication Nos. 51-46213 and 56-38058, the corrugated paper sheet is cut into a long side. After forming the engagement groove for combining the partition piece in the direction and the partition piece in the vertical direction in the vertical and horizontal directions, the both engagement pieces are engaged and fixed so as to be orthogonal to the cross shape in the engagement groove portion, What was shape | molded in the partition plate which has the compartment formed between the vertical and horizontal partition pieces is known.
[0004]
However, the cardboard paper partition plate formed in this way has a certain level of mechanical strength and shock-absorbing properties, but the plate-like cardboard paper is cut into elongated strips. Since the process for processing the body is complicated, it is a factor that increases the production cost in terms of labor costs and other aspects.
In addition, in order to wrap using the partition material made of sawdust, cotton or other cushioning material such as the latter, it is necessary to wrap the articles one by one with the cushioning material, and the cushioning material is easily scattered. As a result, rearranging etc. is cumbersome and not efficient.
[0005]
Therefore, in recent years, as an alternative to the partition board using the corrugated paper as described above, polyethylene, vinyl chloride, etc. as described in Japanese Utility Model Laid-Open Nos. 57-143183 and 62-18241 are disclosed. Partition plates using a thermoplastic synthetic resin are known, and these are frequently used because they have the advantage that the production cost can be reduced because the material is inexpensive and the molding process is simple.
In order to form the partition plate made of thermoplastic synthetic resin as described above, a soft sheet material made of synthetic resin such as vinyl chloride is heated and softened, and then sheet blowing or vacuum forming or other pressure forming method is used. In this way, a horizontal partition and a vertical partition wall are projected at the same time and simultaneously formed, and a concave portion for storing articles defined by the partition wall is integrally formed to form a tray-shaped partition. Mold into a plate.
[0006]
However, such conventional partition plates made of synthetic resin are generally formed from soft sheet materials such as vinyl chloride and polyethylene, and are suitable for packaging sweets and other lightweight items. However, if the product is used as it is for packaging a slightly heavy product such as canned food or canned food, the box may fall down and thrown out during transportation or transportation, or If the box is subjected to a large impact force due to inadvertent handling that falls from a human hand and falls to a hard floor surface, etc., the partition material of the flexible material will not be able to receive the impact sufficiently. The parts that intersect with the horizontal partition wall and the vertical partition wall of the inner partition plate and the vicinity thereof are deformed or damaged, and the goods move from a predetermined position, causing the cans to collide with each other. It may cause deformation on the surface of The point has been made.
[0007]
In addition, with the recent improvement of social life, mass consumption due to mass production of various products will be carried out, and the large amount of waste generated and its treatment will cause social environmental problems. As a result, recycling of these wastes has been demanded from the viewpoint of avoiding wasteful use of resources.
In such a social situation, a recycling law concerning a synthetic resin container has been implemented, and a situation has arisen in which a large amount of used empty containers must be collected.
[0008]
Under such circumstances, it is considered that not only containers but also packaging materials in general can be collected and reused without exception. Cardboard paper used in packaging boxes, etc. can be recycled. It is measured.
However, since the cardboard partition plate used for the above-described partition is cut into small pieces, it is more troublesome to collect than a box etc. Since the amount is small and expensive, most are currently incinerated.
[0009]
The conventional synthetic resin tray-like partition plate can be easily molded by sheet blow molding or the like, and can be manufactured at a low cost, but it has been used and discarded. If the partition plate is subjected to incineration, chlorine gas, dioxin and other harmful substances are generated, and high combustion heat is generated to damage the incinerator wall. There is.
In addition, about the polyethylene terephthalate (PET) resin container that is currently used in a large amount as a hollow container for beverages, while being collected in large quantities and being recycled for various things, For those who are involved in the production of containers, it is required to develop a method for using the containers efficiently and appropriately.
[0010]
Therefore, as a result of repeated investigations on eliminating the various problems of such conventional synthetic resin dividers, it does not contain impurities such as plasticizers, so generation of harmful combustion gases due to incineration The conclusion is that a partition plate using polyethylene terephthalate (PET) resin that does not generate high-temperature combustion heat during incineration and has mechanical strength should be formed. The applicant has previously proposed a partition plate having a structure as shown in FIG.
[0011]
When the packaging box body in which the above-mentioned partition plate 41 is mounted in the box and wraps canned beer, canned juice or the like falls in the horizontal direction, the bottom surface 44 supported by the article is wide and the shock absorption is also good. It was good and could withstand the impact force applied to the partition walls 42 and 43, and no problem occurred.
In addition, even if the can body is dropped in the lateral direction, the can body portion is in close contact with the bottom wall surface of the partition wall of the partition plate and the relatively wide surface of the side wall curved surface, and the impact force applied to the lateral partition wall 42 is one point. It was alleviated without concentrating on, and no abnormalities were found in the packaged items.
[0012]
However, when a strong impact force is applied by dropping in the vertical direction, the impact force applied to the article is concentrated in the narrow part of the bottom of the can supported by the lateral partition wall 42 of the partition plate. It is easy to receive and may cause a large drop impact force to act on the horizontal partition wall to generate cracks 46. Also, deformation or cracks may occur in the vicinity of the intersection 45 or in the vertical partition wall 43. May occur.
The simplest solution to prevent deformation and cracking of the partition wall due to the impact force at the time of dropping can withstand the impact load at the time of dropping if the thickness of the partition plate is increased to make it rigid. However, this requires more resin material, which increases the weight of the partition plate and goes against resource savings, and at the same time increases costs and increases waste.
[0013]
Therefore, as a result of examining the cause of the occurrence of deformation, cracks and the like as described above, it is due to an insufficient stretch amount when processing a sheet material made of PET resin. It was found that a partition plate with increased mechanical strength can be obtained by applying the above.
Therefore, as shown in FIG. 5, without forming the vertical partition wall 53 and the horizontal partition wall 52 provided in the central portion of the middle partition plate 51 in a continuously formed state as in the prior art, The partition wall 53 in the vertical direction has a structure divided at a plurality of portions in the middle, and the partition wall 52 in the horizontal direction is also divided in the middle, and the free ends 52a, 52b and 52e thus separated. , 52f has a structure in which the partition walls in the vertical direction are lined up in parallel with the divided recesses, and the partition wall is reinforced by applying a large stretching operation to the partition wall.
[0014]
Since the partition plate 51 formed in the structure as described above is formed in a concavo-convex shape in a discontinuous state where the partition wall is divided in the middle, and the resin sheet material is more stretched and oriented, the mechanical strength At the same time, the end of the partition wall has a flexible free end structure, so that the box body that contains and wraps the article in the inner partition plate 51 has a strong vertical impact. Even if it receives, since the edge part 12a, 12b, ... can bend without difficulty in the partition wall 52 of the horizontal direction, the impact force received through the bottom face of the packaged item is absorbed and dispersed. Thus, no concentrated load is applied to one place, and no strong impact force is directly applied to the partition wall 53 in the vertical direction.
[0015]
However, such a partition plate having high mechanical strength and flexibility has a mechanical strength that is sufficiently strong against impact force, but is a trade name for packaging as a gift. In addition, there is no part to display the product name or trademark name, and the shape is complicated, so the heated and softened sheet material is used in the same way as before by sheet blow or other pressure molding methods. In order to mold, the mold must have a complicated shape, and manufacturing such a mold requires high technology and precision, so manufacturing costs must be slightly higher. There are problems such as not.
[0016]
Therefore, in order to form a partition plate having high mechanical strength and flexibility based on a conventional partition plate having a simple structure as shown in FIG. It is formed so that the top wall is higher than the partition wall, and it is formed into a middle partition plate having a high stretching effect, and the partition wall in the horizontal direction and the vertical direction that are most likely to receive concentrated load structurally intersect. Even if the package is subjected to a strong impact force in the vertical direction, the impact force applied to the narrow part such as the bottom of the can contained inside can be reduced. It is expected that a wall part that is easily received in a concentrated manner is not deformed or damaged, and that a partition plate having a simple structure is molded using PET resin or recycled PET resin.
[0017]
[Problems to be solved by the invention]
The present invention is a packaging having a simple structure that is excellent in impact resistance by using a PET resin sheet material formed from a thermoplastic resin, especially a non-polluting polyethylene terephthalate (PET) resin or a recycled PET resin. In addition to forming a partition plate for a box, the structure of the partition plate is made simple so that it can be easily molded using a conventional molding device, and a concentrated load is easily applied when the package is dropped. Formed in a structure in which the vertical and horizontal partition walls are sufficiently stretch-molded to absorb the impact force when the box drops or collapses, and cracks occur near the intersection of the partition walls. An object of the present invention is to provide a partition plate for packaging in which the occurrence of the problem is prevented.
[0018]
[Means for Solving the Problems]
Forms a partition box for packaging boxes with excellent impact resistance and simple structure using a thermoplastic synthetic resin, especially polyethylene terephthalate (PET) resin, or sheet material molded from recycled PET resin. Therefore, when the partition wall is formed by heating and softening the PET resin sheet material to a temperature at which the PET resin sheet material can be stretch-molded so that the longitudinal and lateral partition wall portions are sufficiently stretch-molded. The partition wall part in the direction is shaped so as to be higher than the partition wall part in the vertical direction, and the end part of the partition wall in the vertical direction is a free end so that it does not touch the display part of the product name etc. In addition, by forming a recess on the top wall of the vertical partition wall to provide a flexible structure, an intermediate partition plate having a structure that can sufficiently withstand a strong drop impact is formed.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
A sheet material formed from polyethylene terephthalate (PET) resin is heated and softened to a temperature at which it can be stretch-molded. Of the vertical and horizontal partition walls 2 and 3 that form the compartment 4 for accommodating goods, the horizontal partition wall portion 2 that is most susceptible to concentrated load is provided by the vertical partition wall portion 3. Further, the vertical partition wall 3 is formed as a free end 3a formed so that the end of the partition wall 3 in contact with the product display portion is inclined so as not to be directly connected to the wall surface. The partition plate 1 having excellent impact resistance is formed by providing a recess 3b on the top wall of the partition wall 3 to give the partition wall flexibility.
[0020]
【Example】
The invention of the present application will be described based on an optimum embodiment with reference to the drawings.
In FIG. 1, the partition plate 1 of the present invention is mounted in a packaging box B. The partition plate 1 is formed by sheet blowing a sheet material formed using PET resin. It is stretch-molded by molding or other known molding methods.
As shown in FIG. 1 and FIG. 2, the inner partition plate 1 has a recess 4 suitable for storing an article such as a can divided by a vertical partition wall 3 and a horizontal partition wall 2. The bottom wall surface of the recess 4 is formed in a curved surface and is provided with a buffer recess 4a. A slit 4b for venting air is provided at the center of the buffer recess 4a. The display part 7 which displays the brand name and others is formed in the upper side part (or lower side part) of the partition plate.
[0021]
The horizontal partition wall 2 is formed so as to be higher than the top wall surface of the vertical partition wall 3, and both end portions thereof are formed in an inclined shape with no corners. The end of the vertical partition wall 3 on the display unit 7 side is formed in the shape of a free end 3a having an inclined surface, and is not directly connected to the side wall surface 7a of the display unit 7 but connected to the bottom wall surface. Furthermore, small depressions 3b are formed at a plurality of locations on a part of the top wall of the partition wall 3 in the vertical direction.
In addition, the side wall 5 constituting one vertical partition wall is formed in a free end 5a shape having an inclined surface also in contact with the horizontal partition wall 2, and is connected by a bottom wall surface. A substantially V-shaped groove 5a is formed on both sides of the partition wall 2 in the horizontal direction.
[0022]
The partition plate 1 made of the PET resin of the present invention formed in the above structure is formed such that the horizontal partition wall 2 is higher than the vertical partition wall 3, and the vertical partition wall Since the depression 3b is formed in the top wall surface of the sheet 3, when the sheet material made of PET resin is molded by the sheet blow molding method, the stretching process is performed so that the stretching amount of the vertical and horizontal partition walls with respect to the sheet material becomes large. Can be applied.
Therefore, the partition plate 1 of the present invention formed as described above has a larger extension amount of the partition wall portion than the conventional partition plate 41 having the structure shown in FIG. The strength is increased and the impact resistance is also increased.
[0023]
In addition, the end of the vertical partition wall 3 on the side where one end of the partition wall 3 is in contact with the display unit 7 such as a trade name is not connected directly to the side wall surface of the display unit 7, but the inclined surface And a small depression 3b is formed on the top wall of the vertical partition wall 3, and the horizontal partition wall 2 is formed as a vertical outer wall 5 Since the V-shaped groove is provided in the portion connected to the wall, both the vertical and horizontal partition walls 2 and 3 are provided with a stretching effect and flexibility. The partition plate 1 has a structure having high impact resistance and sufficient shock absorption even for a large impact force.
The above V-shaped groove is intended to give flexibility without directly connecting the vertical and horizontal partition walls, and is U-shaped if it has a shape that does not hinder die cutting during shaping. Various shapes such as a shape and a U-shape are possible.
[0024]
Therefore, even if the partition plate 1 of the present invention having such a structure is subjected to a large impact force in the vertical direction, the partition wall in the vicinity of the central portion where stress is most likely to concentrate is the conventional one. The lateral partition wall 2 is formed to be higher than the pressure receiving surface for receiving the bottom of the product, and the stretch strength is increased to increase the impact strength. Since the partition wall 3 in the vertical direction is enhanced in flexibility, there is no possibility that the partition wall is deformed or damaged such as cracks.
[0025]
The partition plate 1 for packaging of the present invention formed in the structure as described above is mounted in the packaging box B, and the can is stored in the article accommodating recess 4 after the can A such as beer is accommodated. At this time, the recess 4a for buffering and the slit 4b for venting air are formed on the bottom surface of the housing recess 4, so that the inside of the recess 4 can be smoothly formed without damaging the wall surface of the can A. Can be accommodated.
And even if the packaging body packaged using the partitioning plate 1 for packaging of the present invention in this way causes a collapse of the load during transportation or slips off from the hand and receives a large impact. Since it is possible to absorb all the impact force applied to the product in the package, the product will not be damaged.
[0026]
In the partition plate 1 structured as described above, in the drawing showing the embodiment of the present application, the depression 3b provided on the top wall surface of the vertical partition wall 3 has a central portion on the display unit 7 side. It is formed only on the partition wall and only near the end on the opposite side of the display unit 7 side, but it is considered to be optimal according to the size of the partition plate and the number and shape of the receiving recesses 4 It is possible to form an appropriate number or size in the portion to be provided.
Similarly, with respect to the point where the V-shaped groove is formed in the free end 3a in which the end portion of the vertical partition wall 3 is formed in an inclined surface and the portion connecting to the horizontal partition wall 2 of the vertical partition wall 3, It is not limited to a place like an Example, According to the magnitude | size and shape of a partition plate, providing as many as needed in a suitable place is permitted.
[0027]
【The invention's effect】
In the present invention, the partition wall for packaging is formed using a sheet material made of PET resin, and the partition wall, in particular, the lateral partition wall is formed so that the top wall is higher than the vertical partition wall. Therefore, since the partition wall portion is subjected to a large stretching operation, the mechanical strength of the partition wall is stronger than the conventional one, and the packaging body is large in the vertical direction due to load collapse or dropping. Even when subjected to an impact, the pressure receiving area that supports the bottom of the item in the package is wide, and the impact resistance strength is also large.
[0028]
In addition, since the partition wall extending in the vertical direction has a display portion extending in the horizontal direction and the end in contact with the partition wall is a free end and formed into a V-shaped groove, it can withstand a large impact force with flexibility. Can be manufactured at low cost because the structure is not so complicated.
Furthermore, since the partition plate of the invention of the present application can be molded using a sheet material recycled from PET resin, social demands such as resource saving and energy saving can be answered.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a packaging partition plate of the present invention is mounted in a packaging box.
FIG. 2 is a plan view (a) and a lateral side view (b) of a packaging partition plate according to the present invention.
3 is a vertical side view of the packaging partition shown in FIG. 2. FIG.
FIG. 4 is a view showing a packaging partition plate made of a conventional PET resin.
FIG. 5 is a view showing a packaging partition plate as a prior example of the present invention.
[Explanation of symbols]
1. 1. Partition plate 2. Horizontal partition wall Vertical partition wall 3a. Free end 3b. Dimple 4. Housing recess 4a. Buffer recess 4b. Slit 5. Longitudinal outer wall 5a. Free end Storage article B. Box

Claims (6)

Forming a plurality of vertical and horizontal partition walls projecting on the surface of the sheet of thermoplastic synthetic resin, and integrally forming a recess for accommodating articles between the vertical and horizontal partition walls; In the partition plate formed by forming a display portion such as an article at the end of the partition wall in the vertical direction, at one end portion of the partition plate, a display portion for displaying the article etc. is formed to protrude, and The vertical partition wall is formed in a free end shape without being directly connected to the side surface of the display unit, and a plurality of depressions are formed on the top wall surface of the vertical partition wall. A partition plate for an article packaging box characterized by comprising: Forming a plurality of vertical and horizontal partition walls projecting on the surface of the sheet of thermoplastic synthetic resin, and integrally forming a recess for accommodating articles between the vertical and horizontal partition walls; In the partition plate formed by forming a display portion such as an article at the end of the partition wall in the vertical direction, at one end portion of the partition plate, a display portion for displaying the article etc. is formed to protrude, and The vertical partition wall is formed in a free end shape without being directly connected to the side surface of the display unit, and a recess is formed in the bottom surface of the recess, and a slit is formed in the recess portion. A partition plate for a packaging box for goods packaging. The vertical partition wall is formed at the free end in which the end portion is in contact with the side surface of the display unit as an inclined surface, and the portion in contact with the horizontal partition wall is formed in a groove portion , The said partition part is formed in the part which the outer side wall which forms the partition wall of a vertical direction, and the partition wall of a horizontal direction contact | connect, The inside partition of the box for goods packaging according to claim 1 or 2 characterized by the above-mentioned. Board.   The said partition part is formed in the substantially V shape with which the edge part of the partition wall of the vertical direction inclined, The partition plate of the box body for goods packaging described in Claim 3 characterized by the above-mentioned.   The said horizontal partition wall is formed so that the top wall part may protrude higher than the top wall part of a vertical partition wall, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. A partition plate for the packaging box for goods.   The said partition plate is comprised using the polyethylene terephthalate resin sheet material or the reproduction | regeneration polyethylene terephthalate resin sheet material, In the box for goods packaging described in any one of Claim 1 thru | or 5 Partition plate.

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