JP4158582B2 - Composite container made of paper and plastic - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composite container in which an outer corrugated cardboard and an inner plastic are combined. In particular, the composite container has a high viscosity and is used as an alternative to a metal 18 liter can used by opening the cover entirely and opening it fully. About.
[0002]
[Prior art]
Conventionally, 18-liter cans made of metal such as steel have been widely distributed. However, when the metal can is filled with a liquid with a relatively high viscosity, or when the contents must use a solvent or the like as a diluent, the upper surface of the metal can In addition, there is a problem that the cut edge is sharp and dangerous, there is a step, and when the contents are scraped off with a coating plate or the like, it cannot be cleaned cleanly.
[0003]
In addition, there is a so-called bag-in-box type in which the exterior is a cardboard box and the interior is a bag made of a plastic film. In this case, when scraping the contents with a coating plate, There is a problem that the paper is easily torn and the contents cannot be scraped cleanly without waste.
[0004]
[Problems to be solved by the invention]
The present invention has been made to solve the above-mentioned problems associated with metal 18-liter cans and bag-in-boxes, and the contents can be easily removed with an application plate or the like, and there is no danger. An object of the present invention is to provide a composite container made of paper and plastic that is easy to handle.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, a plastic molded product inner box with a flange having a top surface that is substantially smaller than the outer box is inserted from the bottom surface through an opening surface of a cardboard outer box having a top surface opened. The bottom surfaces are bonded together, the opening surface of the interior box is sealed and sealed with a plastic film, a cardboard sheet is placed thereon, the opening surface of the exterior box is covered with a cover made of cardboard, and the exterior In a composite container made of paper and plastic, in which a box and a lid are tied and fixed, the lid is connected to a regular quadrangular lid and to the four edges of the lid via a folding line. The cover plate is provided with an oblique fold line connecting two points that are equidistant across the corner angle at the edge of the cover plate in the vicinity of the two opposite corners of the cover plate, One side between the corner and outside the diagonal fold line A square window for inserting cardboard sheets and a square window for brush placement on the other side are drilled parallel to the fold line, and perpendicular to the edge of the lid plate from the tip and end of the diagonal fold line. A brush holder in which a broken line is drilled toward the side wall, and the corrugated cardboard sheet is a square having substantially the same size as the lid plate, and the brush is pushed and fixed at a position corresponding to the square window for the brush holder. A second diagonal fold line is provided at a position corresponding to the diagonal fold line provided in the vicinity of the corner where the hole is drilled and the square window for inserting the cardboard sheet of the cover plate is drilled, The corner is cut into an isosceles triangle shape, and is a composite container made of paper and plastic.
[0006]
Thus, according to the first aspect of the present invention, the lid member is composed of a regular quadrangular lid plate and side walls continuously provided on the four side edges of the lid plate via folding lines. Is provided with an oblique fold line that connects two points that are equidistant across the corner angle at the edge of the cover plate in the vicinity of the two opposite corner angles, and a corner angle on the outside of the oblique fold line. A square window for inserting a corrugated cardboard sheet is formed on one side, and a square window for brush placement is formed on the other side in parallel with the fold line, and a lid is formed from the tip and end of the oblique fold line. A break line perpendicular to the edge of the plate is drilled toward the side wall, and the corrugated cardboard sheet is a square having substantially the same size as the lid plate, and the brush is placed at a position corresponding to the square window for placing the brush. A brush holder hole is inserted to fix the cardboard, and the cardboard sheet of the cover plate is inserted. The second diagonal fold line is provided at a position corresponding to the diagonal fold line provided near the corner where the corner window is perforated, and the corner is cut off in an isosceles triangle shape. When taking out the contents from the assembled composite container, first, the lid material at the corner where the spout is located is bent along an oblique fold line (the corresponding side wall is broken by the break line), and located under the cover plate. The corrugated cardboard sheet is lifted along the second diagonal fold line and inserted into the square window of the cover plate, and the plastic film bonded to the exposed spout and the flange in the vicinity is applied to the convex part of the flange using a cutter or the like. Along the corrugated cardboard sheet, and then insert it into the square window of the lid plate to expose the spout and remove the lid without removing the strap. Ku, it is possible to pour out the contents.
[0007]
In addition, after use, the lid plate or cardboard sheet can be returned to the original position, and the string hook can be shifted to the opening side and resealed. As a result, it is possible to prevent dust and dust from entering the contents of the composite container once opened.
[0008]
Further, the brush can be placed in the brush placing hole, and it is possible to visually confirm whether the brush has been placed from the square window provided on the cover plate even after packing without removing the cover material.
[0009]
According to a second aspect of the present invention, in the first aspect of the present invention, a lock wall is vertically suspended from the outer peripheral edge of the flange of the interior box, and the side surface is erected from the inside of the lock wall and the corresponding bottom surface. A composite container made of paper and plastic is characterized in that a plurality of guide ribs are formed so as to protrude outside.
[0010]
As described above, according to the second aspect of the present invention, the lock wall is vertically suspended from the outer peripheral edge of the flange of the interior box, and on the outer side of the side surface erected from the inner side of the lock wall and the corresponding bottom surface. Since the plurality of guide ribs are formed so as to protrude, when the inner box is inserted into the outer box, the outer box is sandwiched by the guide ribs, and the insertion of the inner box into the outer box is stabilized.
[0011]
According to a third aspect of the present invention, there is provided the paper according to the first or second aspect, wherein a heat sealing projection having a flat top surface is provided around the periphery of the flange of the interior box. It is a composite container made of plastic.
[0012]
Thus, according to the third aspect of the present invention, since the heat sealing projections having a flat top surface are provided around the periphery of the flange of the interior box, the complete heat of the plastic film to the flange of the interior box is provided. It can be sealed, and further serves as a guide for cutting the plastic film along the flange with a cutter or the like.
[0013]
According to a fourth aspect of the present invention, in the first, second, or third aspect of the invention, one of the corners of the inner box is used for a spout, and the upper edge and a portion near the upper edge that is continuous therewith are recessed outward It is a composite container made of paper and plastic, which is formed by forming a recess.
[0014]
Thus, according to the invention described in claim 4, one of the corners of the interior box is formed for the spout, and is formed by forming a concave portion in which the upper edge and the vicinity of the upper edge continuous therewith are recessed outward. Therefore, when the contents are poured out, the contents are poured out and the contents are poured out more smoothly.
[0015]
According to a fifth aspect of the present invention, there is provided the composite container comprising paper and plastic according to the first, second, third, or fourth aspect, wherein a finger hooking hole is formed in a side surface of the outer box. It is.
[0016]
Thus, according to the fifth aspect of the present invention, since the finger hooking hole is formed in the side surface of the exterior box, the composite container can be easily carried after the string is cut.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
The composite container made of paper and plastic of the present invention will be described in detail below based on one embodiment.
The composite container (1) made of paper and plastic according to the present invention is, for example, as shown in FIGS. 1, 2 and 3, from the opening surface of the outer packaging box (10) made of cardboard with the top surface opened. A flanged plastic molded product interior box (20) with a substantially small top surface opened is inserted from the bottom surface and the bottom surfaces are bonded to each other, and the opening surface of the interior box is sealed and sealed with a plastic film (30). After the cardboard sheet (40) is placed thereon, the opening surface of the outer box is covered with a cardboard lid (50), and the outer box and the lid are hooked (60) and fixed. It is.
[0018]
The outer box (10) is made of corrugated cardboard, the top surface is opened with a regular square, and the bottom surface is closed by, for example, bending the bottom flap (13) and stopping it with gummed tape (14).
Finger hook holes (11) are formed at appropriate positions on the side surfaces.
[0019]
The inner box (20) is substantially smaller than the outer box (10) and has a top surface opened in the same manner as the outer box. A flange (21) is formed on the opening edge.
Those obtained by injection molding of polyethylene resin or the like can be preferably used.
[0020]
A lock wall (22) is vertically suspended from the outer peripheral edge of the flange (21), and is erected from the inner side of the lock wall (22) and the bottom surface (23) of the interior box (20) corresponding thereto. A plurality of guide ribs (25) project from the outer side of the side surface (24) (see FIGS. 4A and 4B). The guide rib (25) may be an undercut rib (see FIG. 4B).
[0021]
By providing guide ribs (25) on the side surface (24) and the lock wall (22) of the inner box (20), as shown in FIGS. 3 and 4, when the inner box is inserted into the outer box, Is fixed in the shape of being sandwiched between the flanges of the inner box, and the inner box and outer box are more integrated.
[0022]
About two guide ribs (25) are preferably provided for each side of the interior box.
[0023]
Further, a heat sealing projection (26) having a flat upper surface is provided around the top surface of the flange (21) of the interior box (20).
One of the upper corners of the interior box (20) is formed for the spout (27) by forming a concave portion in which an upper edge and a portion near the upper edge continuous therewith are recessed outward.
Thereby, even if it is the content with comparatively high viscosity, such as a paint and an adhesive agent, a recessed part becomes an outflow passage and the pouring of the content becomes smoother.
[0024]
Any method may be used to attach the outer box (10) to the inner box (20), but in general, it is performed by the following method.
That is, the sleeve-shaped outer box before assembly is raised, the inner box is inserted into the body (12) of the outer box, and a known adhesive such as a hot melt adhesive is applied to the bottom surface of the inner box and at the same time, The bottom flap (13) is bent, the bottom is closed, and the bottom of the inner box and the bottom of the outer box are bonded. The bottom surface of the outer box is fixed from the outside with a gum tape (14) or the like (see FIGS. 1 and 2).
[0025]
After filling the interior box (20) with contents such as paint, the opening surface of the interior box (20) is covered with a plastic film (30), and the interior box is formed by a method such as a heat seal method or an ultrasonic seal method. The heat seal projection (26) of the flange (21) and the plastic film (30) are hermetically sealed.
[0026]
As the plastic film (30), a single film such as low-density polyethylene and linear low-density polyethylene, which is heat-weldable with the interior box (20) and has a certain gas barrier property, or nylon / aluminum foil / A composite film having an inner surface made of polyethylene resin such as polyethylene and nylon / polyethylene can be preferably used.
[0027]
A cardboard sheet (40) having substantially the same size as the opening surface of the interior box is placed on the upper surface of the interior box with the opening surface hermetically sealed.
In the vicinity of one corner of the corrugated cardboard sheet (40), a corner window (41) for placing a brush, which will be described later, is drilled, and in the vicinity of the opposite corner, the corner is cut obliquely as a spout side. (42) and the inside thereof is provided with a second oblique fold line (c) parallel to the oblique cutting line (see FIG. 5).
[0028]
The lid member (50) covering the opening surface of the outer box (10) is a regular tetragonal lid plate (51) that is substantially larger than the opening surface, and side walls that are connected to the four edges of the lid plate via folding lines. (52) (see FIG. 6).
[0029]
The lid plate (51) is provided with an oblique fold line (a) connecting two points that are equidistant across the corner angle at the edge of the lid plate in the vicinity of two opposing corner angles. A corner window (53) for inserting a corrugated cardboard sheet (40) on one side and a corner window (54) for placing a brush on the other side are diagonally bent between the corners outside the fold line. It is drilled parallel to (a).
When covering the exterior box (10), the corner box provided with a corner window (53) for inserting the cardboard sheet (40) is placed so as to come to the spout (27) of the interior box (20).
[0030]
A break line (b) perpendicular to the edge of the lid plate (51) is drilled from the tip and end of the oblique fold line (a) toward the side wall (52).
[0031]
For example, when placing the brush (70) on the plastic film (30), for example, placing a brush, placing the cardboard sheet (40) on the plastic film (30), and covering the lid (50) on the cardboard sheet (40), for example, As shown in FIG. 7, the handle portion of the brush (70) enters the square window (41) of the cardboard sheet (40), and the square window (54) for placing the brush provided on the cover plate (51). ), The handle portion of the brush is absorbed by the thickness of the two corrugated cardboards, and it looks good without protruding even when viewed from the outside. .
[0032]
Finally, the inner box (20) is inserted into the outer box (10), the opening surface of the inner box is hermetically sealed with a plastic film (30), and the cardboard sheet (40) is placed thereon, and further on Cover the lid (50) and, for example, use a polypropylene tape (60) to tie it in a cross shape to fix the container and the lid (see FIG. 1).
[0033]
Next, a method in the case of partially pouring out contents such as paint contained therein from the spout will be described with reference to FIGS. 8 (a) and 8 (b).
The lid material (50) at the corner on the spout side is folded along the oblique fold line (a) (the corresponding side wall (51) is also broken by the break line (b)), and the corrugated cardboard sheet ( The corresponding portion of 40) is valley-folded along the second oblique fold line (c) and inserted into the square window (53) of the lid plate.
[0034]
Next, the plastic film (30) adhered to the exposed spout (27) and the flange (21) in the vicinity thereof is formed into a triangle along the heat seal projection (26) of the flange using a cutting tool such as a cutter. It is cut off or bent in the same manner as the corrugated cardboard sheet (40) and inserted into the square window (53) of the cover plate to expose the contents directly.
[0035]
Tilt the container and remove the required amount. After removal, reverse the previous opening order and store the brushes back to the original corners of the lid. The corners of the lid material opened by shifting the hanging strap (60) such as a PP band to the opening side are restored and closed.
[0036]
In use, the brush (70) housed under the cover of the composite container is taken out by bending the corners of the cover plate (51) and the cardboard sheet (40) in the same manner.
[0037]
【The invention's effect】
As described above, since the present invention is a composite container made of paper and plastic, there are the following effects.
That is, by combining cardboard and a plastic molded product, a container capable of storing a high-viscosity content in a large volume can be obtained.
By making a metal can into a plastic container, the contents can be taken out without worrying about the mouth and the level difference inside.
By locking the mouth of the cardboard to the plastic molded container, it is difficult to come off and is easy to set.
High sealing performance could be obtained by sealing the mouth by heat sealing.
By combining the corrugated cardboard and PP band well, the function of easy resealing lid can be given.
Moreover, it is possible to give the whole the texture as paper (cardboard).
Furthermore, it has become possible to minimize waste by using cardboard, plastic film, and PP bands as the cover material for paper composite containers.
[Brief description of the drawings]
FIG. 1 is a perspective explanatory view showing an embodiment of a composite container made of paper and plastic according to the present invention.
FIG. 2 is a perspective explanatory view showing one embodiment of each element of the composite container made of paper and plastic according to the present invention.
FIG. 3 is a partial cross-sectional explanatory view showing an embodiment in a state where a plastic film of a composite container made of paper and plastic according to the present invention is sealed.
4 (a) and 4 (b) are enlarged explanatory views of a portion A in FIG.
FIG. 5 is an explanatory plan view showing an example of a corrugated cardboard sheet used in a composite container made of paper and plastic according to the present invention.
FIG. 6 is an explanatory plan view showing an embodiment of a lid member used for a composite container made of paper and plastic according to the present invention.
FIG. 7 is a cross-sectional explanatory view of an embodiment of an accommodation state of an object such as a brush housed between a plastic film and a lid member of the interior box.
FIGS. 8A to 8B are explanatory views showing a state in which contents are partially taken out and the composite container is closed again.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Composite container 10 ... Exterior box 11 ... Finger hook hole 12 ... Body part 13 ... Bottom flap 14 ... Gum tape 15 ... Adhesive 20 ... Interior box 21 ... Flange 22 ... Lock wall 23 ··················································································································································· Material 51 ··· Lid plate 52 ··· Side wall 53 ··· Square window 54 ··· Brush window 60 · · · String 70 · · · Brush a · · · Diagonal fold line · · · Break line c · · · 2nd diagonal fold line

Claims (5)

Inserting an interior box of a plastic molded product with a flange having a top surface that is substantially smaller than the exterior box from the bottom surface of the corrugated cardboard exterior box with the top surface open, and bonding the bottom surfaces to each other, The opening surface is sealed and sealed with a plastic film, and a cardboard sheet is placed thereon, and then the opening surface of the outer box is covered with a cardboard lid, and the outer box and the lid are tied and fixed. In a composite container made of paper and plastic,
The lid member is composed of a regular square lid plate and side walls continuously connected to the four edges of the lid plate via a folding line, and the lid plate has two corners in the vicinity of each other. In order to insert a corrugated cardboard sheet on one side between the corners on the outer side of the diagonal folding line provided with an oblique folding line connecting two points that are equidistant across the corner at the edge of the cover plate The other corner window is a hole for brush placement parallel to the fold line, and a break line perpendicular to the edge of the cover plate is formed on the side wall from the tip and end of the oblique fold line. The corrugated cardboard sheet is formed in a square shape that is substantially the same size as the cover plate, and a brush holder hole is formed in the position corresponding to the square window for the brush holder to press and fix the brush. Near the corner where a corner window for inserting the cardboard sheet of the cover plate is drilled The position corresponding to the provided oblique folding lines thereof corner is provided the second oblique folding line is cut off the isosceles triangle, and wherein the being, composite container consisting of paper and plastic. A lock wall is vertically suspended from the outer peripheral edge of the flange of the interior box, and a plurality of guide ribs are formed so as to protrude from the inside of the lock wall and the outside of the side surface erected from the corresponding bottom surface. The composite container comprising paper and plastic according to claim 1. The composite container made of paper and plastic according to claim 1 or 2, wherein a heat sealing projection having a flat top surface is provided around the periphery of the flange of the interior box. One of the corners of the interior box is for a spout and is formed by forming an upper edge and a concave portion in which a portion near the upper edge continuous therewith is recessed outward. Or the composite container which consists of paper and a plastic of 3 description. 5. The composite container made of paper and plastic according to claim 1, wherein a finger hooking hole is formed in a side surface of the outer box.

Images