JP2002145246A - Polygonal, cylindrical container made of corrugated board and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a polygonal, frustum conical and cylindrical container from corrugated board excellent in cushioning properties at a low cost, and make reutilization and disposal easier after using the container. SOLUTION: The cylindrical container 1 is formed with a body 2 and a lid 16, both using corrugated board. When the body 2 is seen in a developed state, a body sheet 3 is made into a segmental shape, and its segment is radially divided into a plurality of trapezoidal portions at equal angles along fold lines. The segment is folded from a substantially intermediate portion positioned in a longitudinal direction along a fold line b, and the folded segmental parts are superposed on each other as an inner body sheet 4 and an outer body sheet 7 to be adhered to each other and fixed together so as to be made double. The segmental part thus formed is then folded along a fold line a, and joints 5 and 6 at both ends its are connected to each other to form a slant, polygonal and frustum pyramidal cylinder. A bottom sheet 11 is inserted into the cylinder, and an outer bottom sheet 13 is fixed to overlap widths 9 and 10 provided at a lower end of the cylinder, thus finishing the body 2. The lid 16, which is flanged in outside fitting fashion, is finished into the same polygonal shape as that of the body, and a recess 24 is formed in the surface of the lid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polygonal cylindrical container using corrugated cardboard for storing any of powder, solid and liquid as a package, and for storing and moving the container, and a method for producing the same.

[0002]

2. Description of the Related Art Containers have the purpose of storing, storing and moving articles. Containers with an actual weight of about 20 kg and a size that can be carried by human power are roughly classified into cubes and cylinders in appearance, and each has a different use. Cubes include an outer container for storing a large number of small-unit packages, and a liquid container in which the container also serves as the outer package. The material of the container is paper or
Choose from non-metallic materials such as wood and synthetic resin or metallic materials such as rust-proof steel plates. In the case of a cylinder, the container itself often also serves as the exterior, and the material is selected from paper, synthetic resin, metal, and the like, depending on the storage items.

A cubic container includes a paper container called a cardboard box, which is foldable and suitable for storage and movement. This container is J
In the IS, the range of the actual weight of 10 to 50 kg is divided into two types and four stages, but there are many types and sizes of exterior containers other than JIS. The weak point common to this paper container is low surface (body surface) strength, and when strength is desired, a container made of wood or synthetic resin is required. Solids, powders, and liquids can all be stored, but for powders and liquids with fluidity, consideration must be given to the form of packaging before storage in a container. In addition to paper containers, there are 5 gallon cans for liquids, also called oil cans.

[0004] The cylindrical container itself is used also as an exterior, and is rarely used as an exterior container for accommodating a large number of small unit packages. Powders and liquids are the main targets, and solids often have shapes similar to powders. The container is made with a certain ratio of the diameter and height of the cylinder to ensure stability and the body does not swell and deform.
The material is made of special paper processed products such as paperboard for vat and vulcanized fiber, synthetic resin, or materials such as stainless steel and plated steel. Containers include fiber drums and pail cans, and the purpose of use depends on what is stored.

[0005]

The basic requirements for a container are that the container be safely stored and that the container itself withstand repeated storage and movement. To answer this request,
Containers made of new materials have been developed, such as using synthetic resin as the material. However, in addition to cost countermeasures caused by competition between companies, demands for effective use of resources and protection of the environment have come to face new issues one after another.

[0006] The above-mentioned problems are different depending on the state of the container. Before use, including the manufacturing stage, there are reductions in storage volume, weight reduction, deformation prevention, and improvement in handleability, all of which involve costs. After use, there is a time and effort for reusing resources and environmental measures, all of which involve costs. Looking at the adequacy of container materials in terms of total cost, including manufacturing, resources, and the environment, in the case of synthetic resins and metals, the strength advantage changes to the disadvantage of post-use processing, making it difficult to solve problems. Often do.

[0007] Paper can be said to be easier to solve than synthetic resin or metal, but the use of strong paper has the disadvantage of increasing costs. In this regard, corrugated cardboard, a typical packaging material, has a three-layer structure in which a wavy middle sheet (thin paper) is sandwiched and the front and back sides are bonded with a liner (thin paper). It has many advantages. However, due to the existence of the hollow portion and the direction of the wavy shape of the shin, the bending strength in a specific direction is extremely low and has a disadvantage that it is easily broken. If it breaks, the three-layer structure will be crushed, the thickness will disappear, and it will be easier to deform. For this reason, when corrugated cardboard is selected as a material, the shape of the container is limited, and the container within the range that can be handled manually is limited to a foldable outer box.

[0008] Reducing the storage volume is also one of the issues required for containers. The problem is that with materials other than corrugated cardboard, stacks (nests) are created by tilting some shapes of containers.
It provides a function and adopts a circular cross section to improve the strength of the container, which solves each problem. However, when applying this method to cardboard, low strength in a specific direction becomes an obstacle, and the cardboard collapses at the initial stage of arching and does not become a cylindrical container. At present, a cubic box is the limit, and the stacking function can be obtained by making the two sides of the cube a trapezoid, but it cannot be said that the structure is suitable for industrialization. For this reason, cardboard suitable for recycling and disposal is
If it is a container, its shape and use are limited. Note that the stack means the stacking expression, the nest means the nesting expression, and in the following description,
Both are represented by a stack.

The advantages and disadvantages of the container described above are summarized. The cardboard box has low strength and poor water resistance, but is easy to store and treat after use. 5-gallon cans have poor storage properties and are made of metal, which makes post-processing difficult. Pail cans have poor storage properties and are made of synthetic resin or metal, which makes post-processing difficult. Fiber drums are expensive using specially processed paper for paperboard and vulcanized fiber, have poor storage properties, and are difficult to post-process.

[0010]

SUMMARY OF THE INVENTION The present invention is directed to a cylindrical container using corrugated cardboard in order to solve the cost problems of a synthetic resin or metal cylindrical container including storage, utilization of resources and disposal. And its manufacturing method.

According to the present invention, in a container comprising a main body and a lid, a body is constituted by a body plate and a bottom plate, and the body plate has a shape in which a plurality of rectangles are connected in a horizontal direction, and the vertical direction of the shape is substantially the same. Bending from the center, overlapping and fixing the inner body plate and outer body plate as a double, bending from multiple rectangular fold lines, connecting both ends to a polygonal tube, with the same number of polygons as the tube Insert the double bottom plate into the inside of the cylinder, glue and fix the glue margin connected to the outer bottom plate and the outer body plate to make the body, the lid is composed of the lid plate and the shell plate, the outer circumference of the same number of polygons as the cylinder The inner and outer folds are connected on the outer periphery, the two folds are sequentially bent inward, and a lid with a rim is sandwiched between them and fixed by gluing.A corrugated cardboard combining the body and the lid is used. It is a square cylindrical container. Further, in the container consisting of the main body and the lid, the body is composed of a body plate and a bottom plate, and the body plate is formed of a polygon connected in the direction of the long side thereof through a folding line provided on the long side of the rectangle. With a fan shape, the fan shape is made into an inner body plate and an outer body plate through a fold line provided at substantially the center in the vertical direction, and the gap between the adjacent outer body plates is cut off, and the glue allowance is made at the upper end of the outer body plate through a fold line The outer shape of the bottom plate is the same number of polygons as the fuselage.The outer body plate at the upper part of the fan is bent outward along the fold line and superimposed on the inner body plate. The long sides of the rectangles that make up the plate are sequentially bent inward along the fold lines, and the joints at both ends of the body plate are joined together, and both joints and the outer body plate are adhesively fixed and finished into a double-sided polygonal cylinder. Insert the polygonal bottom plate into the cylinder, shape it, glue and fix the bottom plate and glue allowance to finish the body, and cover the lid Constituted by Shin plate, the cover plate, the outer periphery of the body and the same number of polygons, arranged fold line to the polygon sides,
The inner and outer folds are connected concentrically and the inner and outer folds of the cover plate are bent inward sequentially, and the fin plate is sandwiched between the two folds and glued and fixed to finish with a lid with an edge. This is a method of producing a polygonal cylindrical container using cardboard with a body and a lid combined.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a cylindrical container using processed paper called corrugated cardboard and a method for producing the same. The polygonal and double structure enhances the strength, and the lightweight container has a slope (slope or taper) on the outside to provide a stacking function and improve storage. This container shape corresponds to a pail can, and solved the problems that occur after use of the container, that is, the recycling of resources and environmental pollution due to pollution, and contributed to the reduction of total cost.

A cylindrical container composed of a body and a lid was made of cardboard. First, in order to provide a stack function, the shape of the body plate in which the body was developed was made a sector shape. Next, in order to supplement the directional strength of the cardboard, the sector is radially divided into a plurality of parts at equal angles, and the divided part is a trapezoid with a long side with a slope, and a broken line is arranged on the long side. did. The upper half of the fan shape was bent, overlapped on the lower half, and bonded to form a double. Next, the body plate was bent along the long side folding line, and both ends were connected to form a cylinder. The bottom plate was inserted into the cylinder, and the glue bent at the end of the cylinder was double-bonded to form a truncated pyramid-shaped body having a polygonal cross section.

With this structure, a stack function for improving storage efficiency is produced, and the surface pressure acting on the side surface in terms of strength is converted into a tensile force in the short side direction (outer peripheral direction) of the trapezoid to cancel out, thereby providing high strength cardboard. Made into a cylindrical container. The length of the short side of the trapezoid considers the plate thickness, and even if the double structure part is arched by surface pressure,
The range was such that buckling did not occur. In addition, the weak portion of the corrugated cardboard was easily bent at the position of the fold line arranged on the long side as much as possible.

When a cylindrical container having a volume corresponding to a weight of about 20 kg is made of cardboard selected from a thickness of 3 ± 2 mm,
It is necessary to consider the structure of the cardboard and the storage object. In order to optimize the strength and cost of the cylindrical container, the range of the number of divisions around the body is selected from 8 to 28, preferably 12 to 24, and more preferably 16 to 20. A guideline for selecting the number of divisions is as follows. The number of divisions is small when the storage object is light relative to the volume, and the division number is set in the middle when the storage object is solid or liquid with fine particles, and when the storage object is heavy relative to the volume, the division number is small. Do more.

The shape of the cover plate in which the cover is developed is such that a two-stage concentric folded portion is connected to the outer peripheral side of the polygon having a hole. After bending the inner folded part inward, sandwich the attached shin plate, bend the outer folded part inward and glue it,
A polygonal cylindrical portion is formed at the edge. After that, the blind plate is inserted and adhered from the back to complete the lid, and it is combined with the above body to make a cylindrical container with a lid.

The present container solves the problem by utilizing the shortcomings having directivity in the strength of the corrugated cardboard, distributing the load on the outer peripheral surface of the polygon, and making up for the insufficient strength by making it double. As a result, the inherent advantages of materials such as light weight, low price, cushioning, heat insulation, flammability, low pollution, etc. were utilized, and storage efficiency was also improved. In addition, use of corrugated cardboard that has been subjected to waterproof treatment expands its use. The corrugated cardboard is not limited to the standard three-layer structure of the front and back liners and the middle lining, but may be a five-layer structure of two middle linings and a three-layer liner. If the stacking function is not required, the body plate may be formed into a rectangular shape instead of a fan shape, and may be subdivided into rectangles.

A polygonal cylindrical container using corrugated cardboard can be applied to a container whose weight greatly exceeds 20 kg. Containers of this size are difficult to carry by hand alone and require the help of logistics equipment. In general, movement by physical distribution equipment often uses the bottom of the container rather than the body. When building a large, polygonal cylindrical container with reinforced cardboard, it is easier to use if the outer bottom surface is reinforced with a woody material that is easy to dispose of. Regardless of the size of the polygonal cylindrical container, it is possible to apply a usage in which the container is inclined obliquely like a drum and rotated. In addition, the property common to cylindrical containers that is easy to roll but is difficult to exceed small steps can be eliminated by using a polygonal shape.

[0019]

The container of the present invention is formed by connecting a trapezoid having a long side of a rectangle with an inclination to form a polygon and a double structure, so that it becomes possible to use a cardboard in a tubular shape. In addition, the use of the trapezoid provided a stacking function, and provided the inherent properties of the material, such as buffering and heat retention. This container does not roll even if it falls down, and it is easy to climb over steps.

[0020]

1 (A, B, C) show the front surface, side surface and back surface of a cylindrical container 1 with partial cross sections. FIG. 2 shows a body plate 3 in which a body 2 of a cylindrical container is developed. FIG. 3 (A, B)
The planes of the inner and outer bottom plates 12 and 13 are shown. 4 to 8
2 shows a perspective view of the process of assembling the fuselage. FIG. 9 shows a plan view of a lid plate 17 in which the lid 16 is developed. FIG. 10 (A, B)
Indicates the plane of the shin plate 22 and the inner lid plate 23. 11 to 14 show perspective views of the assembly process of the lid. FIG.
The storage state of the packaged package is shown in perspective. FIG.
Shows a perspective view of the state of the container on which the string is hung.

As shown in FIG. 1 (A, B, C), a cylindrical container 1
Is composed of a polygonal body 2 and a polygonal externally fitted lid 16. Since the outer periphery of the cylindrical portion of the container is formed by connecting 18 trapezoids having the same shape, the container has a moderately truncated pyramid shape and is suitable for stacking. In addition, since the body and the lid are polygonal, the lid fits easily, the lid does not easily come off, and it is lightweight and extremely easy to handle.

As shown in FIG. 2, the body plate 3 with the body expanded has a fan shape. The whole fan is radially divided into 18 pieces at equal angles, and the vertical direction of the fan is divided into an inner body plate 4 and an outer body plate 7. The inner trunk plate was formed by connecting a trapezoid having both long sides of a rectangle with an inclination to be bent via a fold line a arranged on the long side. Further, one of the 18 trapezoids is divided into joints 5 and 6 and arranged at both ends, so that the 18th trapezoid is formed when the connection of the joints is completed. In addition, when the outer body plate is cut off 8 between the adjacent outer body plates and the outer body plate is bent along the fold line b and overlapped with the inner body plate, the structure is not covered with the outer body plate to make it easy to bend the fold line a. Further, two types of glue allowances 9 and 10 were alternately connected to the upper end of the outer body plate via the folding line c.

As shown in FIGS. 3A and 3B, the bottom plate is composed of inner and outer bottom plates 12 and 13, and the circumference of each is a polygon equally divided into 18 pieces. The outer bottom plate is provided with notches 14 having the same shape as the glue allowance 9 at every other side. The inner and outer bottom plates are overlapped and glued and fixed to form a double, then inserted into the cylinder and shaped and advanced to the required position.

The assembly process of the main body will be described with reference to FIGS. As shown in FIG. 4, the upper side is bent outward along the fold line a substantially from the middle of the fan-shaped body plate 3 in FIG. As shown in FIG. 5, the double body plate 3 is bent inward along the fold line a of the inner body plate 4 in order, the joints 5 and 6 at both ends are joined, and adhesively fixed with the outer body plate 7 to form a polygon. Of the tube. FIG. 6 shows a state in which the bottom plate 11 stuck to the inside of the cylinder of FIG. 5 is inserted, and a glue margin 9 extending from the outer trunk plate is fitted into the notch 14 of the outer bottom plate 13 and bonded and fixed. FIG. 7 shows a state in which the glue margin 10 is overlapped and adhered and fixed so as to straddle two glue margins fitted into the cutouts of the outer shell plate of FIG.

FIG. 8 shows the completed fuselage 2. Inner body plate 4
Except on the folding line a, the inner and outer body plates 4, 7 are doubled, and the bottom plate is also doubled (see FIG. 1). In addition, the connection between the outer shell plate and the outer bottom plate is made by overlapping two types of glue allowance to improve the strength of the cylinder and the bottom.
As a result, the radial force (surface pressure) that the cylindrical portion of the container receives from the stored item is replaced by the tension of the circumferential direction force and cancels out. Therefore, the surface strength of the container is improved and the surface is not broken. In particular,
Since the liquid container is in close contact with the inner surface of the container, a more favorable effect is produced.

As shown in FIG. 9, the lid plate 1 with the lid 16 unfolded
Reference numeral 7 denotes a polygonal plate with a hole 18 composed of 18 sides, the outer periphery of which is equally divided similarly to the body 3. Each side of the outer circumference is connected to the folded portion 19 via the folding line d, and then the intermediate portion 20 and the folded portion 21 are sequentially connected in the radial direction via the folding lines e and f, and the space between the adjacent folded portions is cut off. Have a shape. FIG. 10 (A, B)
Are a shin plate 22 and an inner lid plate 23.

The assembly process of the lid will be described with reference to FIGS. As shown in FIG. 11, the inward folded portion 19 connected to the outer periphery of the cover plate 17 of FIG. 9 is bent inward along the folding line,
Adhesive fixing is performed with the shin plate 22 interposed therebetween. FIG.
0 and the folded portion 21 are bent inward along the folding line, and are adhered and fixed along the inside of the shin plate 22. FIG.
Is an inside view of the lid 16 in which the inner lid plate 23 is inserted and adhered and fixed,
FIG. 14 shows the outer appearance of the lid with the recess 24 formed by the hole 18 of the lid plate and the inner lid plate.

FIG. 15 shows a state in which a packaged package is inserted into the body 2. FIG. 16 shows a state in which the string 25 is hung on the cylindrical container 1 in which the body is covered with the lid. The dent 24 formed by the outer lid plate 17 and the inner lid plate 23 has an effect of making it easier to grasp the string by using a gap formed between the dent and the string after the lace is attached to the lid. Since this container is made of corrugated cardboard, the presence and degree of waterproof / moisture-proof properties may be a problem. Therefore, even when the storage object is a non-hygroscopic solid or powder, as in the case of a hygroscopic solid, powder or liquid, cover the inside of the container with a waterproof and moisture-proof bag and use it away from the container surface. It is desirable.

[0029]

The polygonal cylindrical container using cardboard according to the present invention has the following effects. Since the cylindrical container is made of cardboard, the lightweight and
The advantages of low cost, buffer, heat retention, reuse, flammability, low pollution, etc. were fully utilized. Corrugated cardboard, which has weaknesses in strength, has been solved by adopting a polygonal and double structure. The cylindrical structure with improved strength enables it to be made into a pyramid shape, and the stacking function has improved storage efficiency. The use of cardboard has been expanded by providing waterproof and moisture-proof properties. Recycling and disposal are difficult in synthetic resin or metal cylindrical containers, but in the cylindrical container of the present invention, there is no need to worry, and procurement, manufacturing, reuse, and disposal are easy,
Total cost could be kept low. The polygonal cylindrical container does not have to worry about rolling even if it falls down,
It is convenient to get over a step due to unevenness of the floor.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a polygonal cylindrical container using corrugated cardboard of an embodiment, with (A) showing a front surface, (B) showing a side surface, and (C) showing a back surface with a cross section.

FIG. 2 shows the unfolded shell plate.

FIG. 3A shows an inner bottom plate, and FIG. 3B shows an outer bottom plate.

FIG. 4 shows a double body plate.

FIG. 5 is a perspective view of a cylindrical portion.

FIG. 6 is a perspective view of a first stage of connection between an outer bottom plate and a margin.

FIG. 7 is a perspective view of a second stage of connection between the outer bottom plate and the glue allowance.

FIG. 8 is a perspective view of a completed body.

FIG. 9 shows the developed cover plate.

FIG. 10 (A) shows a herring plate, and (B) shows an inner lid plate.

FIG. 11 is a perspective view of the first turn of the lid.

FIG. 12 is a perspective view of the last turn of the lid.

FIG. 13 is a perspective view with an inner lid plate inserted.

FIG. 14 is a perspective view of a completed lid appearance.

FIG. 15 is a perspective view of a body storing a package.

FIG. 16 is a perspective view of a container in a packed state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cylindrical container 2 body 3 body plate 4, 7 inner / outer body plate 5, 6 joint 8 cutout 9, 10 glue allowance 11 bottom plate 12, 13 inner / outer bottom plate 14 notch 16 lid 17 lid plate 18 hole 19, 21 folded back Part 20 Intermediate part 22 Inner bottom plate 23 Shin plate 24 Depression a, b, c, d, e, f Folding line

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B65D 5/64 B65D 5/64 E

Claims (7)

[Claims] 1. A container comprising a main body and a lid, wherein a body (2) is composed of a body plate (3) and a bottom plate (11), and the body plate has a shape formed by connecting a plurality of rectangles in a lateral direction, The vertical direction of the shape is bent substantially from the center, and the inner body plate (4) and the outer body plate (7) are overlapped and bonded and fixed to form a double. Finish into a square tube, insert the same number of polygonal double bottom plates into the tube, and glue and fix the glue allowances (9, 10) connected to the outer bottom plate (13) and the outer body plate to form the body. The lid (16) is composed of a lid plate (17) and a shin plate (22);
A polygonal outer periphery having the same number of polygons as the cylinder, inner and outer folded portions (19, 21) are connected on the outer periphery, and both folded portions are sequentially bent inward. A polygonal cylindrical container made of cardboard with its body and lid combined. 2. The rectangular shape forming the body plate (3) is as follows:
The polygonal cylindrical container using cardboard according to claim 1, wherein the container has a trapezoidal shape with a long side inclined and having a height. 3. When the outer shell plate (7) is overlaid on the inner shell plate (4), the space between adjacent outer shell plates is cut off (8) so that the outer shell plate does not cover the fold line of the inner shell plate. A polygonal cylindrical container using the cardboard according to claim 1. 4. The polygonal cylindrical container using cardboard according to claim 1, wherein the polygonal cylinder is formed by dividing the circumference and the number of divisions is selected from a range of 8 to 28. 5. The connection between the body plate (3) and the bottom plate (11) is such that glue margins (9, 10) having two types of shapes are alternately connected to the rectangular ends constituting the body plate. Is formed of an inner bottom plate (12) and an outer bottom plate (13), and a notch (14) corresponding to the size of one of the edges (9) of the rectangular end is provided for each polygonal side of the outer bottom plate. ) Is formed, and the adhesive margin corresponding to the cutout of the outer bottom plate is adhesively fitted. Then, the other adhesive margin (10) is overlapped from above so as to straddle the two adhesive margins which have been previously adhesively fitted. A polygonal cylindrical container using the cardboard according to claim 1, which is adhered and fixed. 6. A hole (18) is formed in a cover plate (17) having a polygonal outer periphery, and a non-perforated inner cover plate (23) having the same shape as the cover plate is adhered and fixed to the back side thereof to be doubled. The polygonal cylindrical container using cardboard according to claim 1, wherein a recess (24) is formed in the hole of the lid plate and the inner lid plate. 7. A container comprising a main body and a lid, wherein a body (2) is constituted by a body plate (3) and a bottom plate (11), and the body plate is formed through a folding line provided on a long side of a rectangle. A fan-shaped polygon consisting of a plurality of polygons connected in the long side direction. The fan-shaped body is formed as an inner shell plate (4) and an outer shell plate (7) via a fold line provided substantially at the center in the vertical direction. Is cut out (8), and the outer margin of the bottom plate (11) is made into the same number of polygons as the fuselage. , Bend outwards along the fold line, layer on the inner body plate, glue and fix except for the fold line part, bend the long sides of the rectangle constituting the body plate sequentially inward along the fold line, Align the joints (5, 6), glue and fix both joints and the outer shell plate to finish it as a double-sided polygonal cylinder, and the polygonal bottom plate inside the cylinder Inserting and shaping, gluing and fixing the bottom plate and glue allowance (9, 10) to finish the body, the lid (16) is composed of the lid plate (17) and the tin plate (22), and the lid plate is The outer circumference of the same number of polygons, fold lines are arranged on the sides of the polygon, and the inner and outer folded portions (19, 2) are concentrically formed.
1) was made into a connected unfolded shape, the inside and outside folded parts of the cover plate were sequentially bent inward, and the fin plate was sandwiched between both folded parts and fixed by gluing to finish it with a rimmed lid, and the body and lid were combined. A method of producing a polygonal cylindrical container using cardboard.