JPH0744605Y2 - Composite container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is to fill a gap and a bottom portion of a blank plate made of paper or the like which constitutes a body part and both side edges of the blank plate face each other and to fill the blank plate. The present invention relates to a composite container which is a synthetic resin portion integrally attached and molded to a blank plate so as to form a peripheral portion of an upper opening. This composite container can be used, for example, as a container for powder or granules of sugar, wheat flour, salt, seasonings, detergents and the like.

(Prior Art) A composite container of the above type has been proposed, for example, in Japanese Patent Application No. Sho 62-200,813, and in the production thereof, one piece wound in a cylindrical shape or a rectangular tube shape so as to configure only a body portion. Set the paper blank plate of the plate in the cavity of the molding die, and in the cavity so that both side edges of the blank plate fill the gaps and bottoms of the facing parts and form the peripheral part of the upper opening of the blank plate. A synthetic resin is injected, the synthetic resin is integrally attached to a blank plate, and the obtained container is taken out of the mold.

(Problems to be solved by the invention) By the way, before setting the blank plate in the cavity of the molding die as described above, a flat plate-shaped blank plate is first wound around the shape of the container body by a guide mold or the like. , It is necessary to bend, but if the radius of curvature of the bendable corner part is small, the bending angle is small, the thickness of the blank plate is large, or the blank plate is stiff, it is difficult to bend and the blank plate The blank plate may not be bent properly, and may be displaced from the proper position when the blank plate is set in the mold, or wrinkles, distortions, etc. may occur on the surface of the blank plate.

INDUSTRIAL APPLICABILITY According to the present invention, the blank plate can be bent accurately and easily, so that the blank plate can be correctly set in the mold, so that wrinkles, distortion, etc. do not occur and the quality is good. The purpose is to obtain a complex container.

(Means for Solving the Problems) According to the present invention, in the composite container of the above-mentioned type, a cut line is formed in a bent portion or a curved portion of a blank plate along a ridge direction thereof, and the cut line is a composite container. The range is such that it does not reach or escapes the area of the joint between the synthetic resin part and the blank plate.

(Operation) The cut line is provided in the direction of the ridge line of the bent portion or the curved portion, so that the blank plate can be bent so as to have a predetermined shape and size without difficulty, and the resin is cut during the injection molding of the synthetic resin. Do not wrap around in the line.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the composite container of the present invention, in which R indicates a composite container and C indicates a lid applied thereto.
This composite container R can be used, for example, to house a household laundry powder detergent, but can of course also be used to house other things.

The main body of the composite container R is composed of the blank plate 2 shown in FIG. The blank plate 2 is initially in the form of a flat plate, and the flat plate is wound or bent so that its both side edges 2a and 2b face each other to form a tubular shape, which constitutes the body of the composite container. In the illustrated example, the body portion has a substantially rectangular tube shape, but it may be a rectangular tube shape other than a rectangular tube, a cylinder, an oblong cylinder, or the like.

As shown in FIG. 3, the blank plate 2 is bent into a shape of the body of the composite container by a guide mold (not shown) or the like.
The synthetic resin portions 5a, 5b, 5c are integrally attached so as to fill the gap 3 between the both side edges 2a, 2b and the bottom portion 4 opened downward and cover the peripheral edge portion of the blank plate upper opening 2c. Molded. The state of the composite container R in which the synthetic resin portions 5a, 5b, 5c are integrally molded in this way is as shown in FIG.

To make the composite container R in the state shown in FIG. 1, the blank plate 2 formed in the state shown in FIG. 3 is set in the cavity of a molding die (not shown). The shape of the cavity is the same as the shape of the composite container in FIG. Then, after setting the blank plate 2 in the cavity, synthetic resin is injected into the cavity, and the injected synthetic resin is integrally attached to the blank plate 2 so as to form the portions 5a, 5b, 5c. Injection molding is over.

The relationship between the blank plate 2 and the synthetic resin portions 5a, 5b, 5c in the composite container R thus formed is as shown in FIGS. 4 to 9. First, as shown in FIG. 4, FIG. 5, FIG. 7 and FIG. 9, the synthetic resin portion 5b is formed on the bottom edge of the blank plate 2 and its inner surface so as to completely close the bottom opening of the blank plate 2. Adheres to. And the first
Although there is no gap corresponding to the gap 3 in the central portion of the blank plate side habit facing the synthetic resin portion 5a (the portion for filling the gap 3) shown in the figure, the synthetic resin portion 5a is also formed on the inner surface of the portion without the gap. A synthetic resin portion 5d having a width substantially the same as that of the above is attached in a vertical strip shape by injection. Inside the synthetic resin portions 5a, 5d, vertical reinforcing and stacking ribs 6a, 6d are integrally formed during injection.

The outer peripheral surface of the blank plate 2 is maintained in an exposed state as shown in the figure even after molding by injection of the synthetic resin portions 5a, 5b, 5c, 5d. If necessary, the outer peripheral surface of the blank plate may be partially covered with the synthetic resin portion, or an appropriate coating may be applied to the outer peripheral surface of the blank plate.

As shown in FIG. 4 and FIG. 6 which is a right side view thereof,
On the outer surface of the side view of the short side of the container of the synthetic resin part 5c
a and 8d are integrally formed by injection molding. As shown in FIG. 5, the protrusions 8a and 8d are provided with enlarged heads at their tips. These protrusions 8a and 8d are for engaging the holes 10 at both ends of the flexible resin band-shaped handle 9 shown in FIG. 2, and the handle 9 is rotatable as shown in FIG. It is used when holding the composite container R by hand as a handle. Protrusion 8
In order to facilitate the formation of a and 8d, the synthetic resin portions 5a and 5d are formed to have a wide width at the protrusions. Therefore, in the portion corresponding to the protrusions 8a, the gap 3 is indicated by 3a (Fig. 3). Has been expanded to. In the illustrated example, the outer surfaces of the synthetic resin portions 5a and 5d at the portions where the protrusions 8a and 8d are present are as shown in FIG. 1 and FIG.
As shown by 1, the inner surface is recessed as shown by 12 in the figure.

As shown in FIG. 7 and FIG. 8, the synthetic resin portion on the upper part of the blank plate 2 is located above the upper edge 2c of the opening.
5c is formed. This synthetic resin part 5c is a composite container R
The upper end opening peripheral edge 14 of the. A ridge 15 is integrally formed on the outer surface of the synthetic resin portion 5C over substantially the entire circumference. The projecting edge 15 constitutes a part of the airtight engagement means with the lid c. The details will be described later.

As shown in FIG. 10 showing the cross section of the synthetic resin portion 5a, the blank plate 2 can be formed of a laminated sheet in which a coating synthetic resin layer 17 is formed on the inner surface of a main body 2'made of paper, for example. The synthetic resin layer 17 is, for example, a polyethylene resin layer. The synthetic resin portion 5a is made of the same polyethylene resin as the synthetic resin layer 17. As a result, the synthetic resin portion 5a adheres well to the blank plate 2 via the synthetic resin layer 17 during injection molding. The same applies to the case of the synthetic resin portions 5b, 5c, 5d. As is clear from FIG. 10, the outer surface of the synthetic resin portion 5a is preferably flush with the outer surface of the blank plate 2.

The blank plate 2 can be composed of a laminated sheet other than the above. An example of the lamination is polyethylene (15
μ) / paper (300 g / m ² ) / polyethylene (15 μ) / polystyrene (40 μ).

As shown in FIG. 1 and FIG. 3, a cut line 19 is formed in the ridge line direction in the bent portion or the curved portion of the blank plate 2 of the composite container R. The score line 19 may be a ruled line 19a as shown in FIG. 11 or a half cut 1 as shown in FIG.
9b or the V-cut groove 19c on the inner surface side may be used. In the case of the ruled line 19a, a protrusion corresponding to the inside is formed.

By forming the cut line 19 in this manner, the blank plate 2 can be bent or bent easily and accurately, and the blank plate 2 can be bent and set correctly in the molding die without causing wrinkles or distortion. You will be able to.

As shown in FIG. 1 as an example, the cut line 19 is formed to have a length that does not reach the area of the joint between the synthetic resin portions 5b and 5c and the blank plate 2 or escapes it. By doing so, it is possible to prevent the resin from wrapping around the cut line 19 in the mold during injection molding of the synthetic resin, and to improve the quality of the composite container. Another example of the formation of the score line 19 is shown in FIG.

The reinforcing and stacking ribs 6a and 6b increase the buckling strength of the composite container including the blank plate, and the bottom resin portion.
Improves drop strength of 5b and facilitates stacking of containers.

The protrusions 8a and 8b are preferable because they allow the strip-shaped handle 9 to be easily attached as described above. Conventionally, as a method of attaching a handle to a paper box, both ends of the handle made of paper tape are attached by adhesion, but recently, a method of attaching a plastic tape handle by riveting is also performed. However, this method also has problems in terms of price and design because the manufacturing process is complicated. In contrast, the protrusions 8a, 8
Integral injection molding of b is simple, has high productivity, is excellent in design, and is inexpensive.

Next, details of the lid C will be described.

As shown in FIGS. 1 and 15, the lid C is integrally formed from a top plate portion 21 and a peripheral edge portion 22.

The detailed configuration of the peripheral portion 22 is as shown in FIGS. 16 and 17. As shown in FIG. 16, the peripheral edge portion 22 is a peripheral edge top portion 23.
And a peripheral lowering wall 24 that is integrated with the peripheral lowering wall 24 that descends along the inner surface of the synthetic resin portion 5c at the peripheral edge of the upper opening of the container R, and the peripheral top.
23, and a peripheral skirt portion 25 protruding downward along the outer surface of the synthetic resin portion 5c around the upper opening peripheral edge of the container.

The peripheral top 23 is in close contact with the top of the upper opening peripheral 14 of the container R. The peripheral descending wall 24 is integrally connected to the peripheral edge of the top plate 21 and is integrally provided with a sealing rib 26 on the side facing the synthetic resin portion 5c of the container. On the other hand, an inward protruding edge 27 is formed on the inner surface of the peripheral skirt portion 25,
A concave groove 28 is formed above the protruding edge 27. Lid C
In the state shown in FIG.
Is in close contact with the top of the peripheral edge 14 of the upper opening of the container, the protruding rib 26 is in close contact with the inner wall of the synthetic resin portion 5c, and the inward protruding edge 27 is closely adhered to the lower surface of the protruding ridge 15 of the container. It can be pressed. Further, the projecting edge 15 enters the inside of the concave groove 28. In this way, the inner space of the container R is completely sealed from the outside by performing the sealing action at the peripheral top 23, the protruding rib 26, and the protruding edge 27 at three points.

Ribs 30 can be formed on the peripheral top portion 23 over the entire circumference in an upward direction. In addition, FIG. 1, FIG. 15 and FIG.
As shown, vertical ribs 31 can be formed at the corners of the peripheral edge 22.

As shown in FIG. 16, a thin portion is provided above the inward protruding edge 27.
33 is provided to make this part particularly fragile. In this embodiment, the thin portion is provided in the groove 28.

In the illustrated embodiment, as shown in FIG.
25 is cut out at the center of the short side of the edge C as indicated by 35. The notch 35 is formed only in a portion below the thin portion 33, and a tear tab 36 is provided on one side of the notch 35 so as to project. Further, a knob 37 is integrally provided on the upper portion of the notch 35 so as to project.

In order to apply the lid C to the container R, both of them are made of a hard synthetic resin having elasticity. Therefore, the lid C is pushed down against the container R in the state shown in FIG. Mating. This causes the inwardly projecting edge 27 of the lid to engage the underside of the ridge 15 of the container so that the lid will not disengage from the container. Also,
Along with the peripheral top plate portion 23 and the ribs 26 being pressed against the container, the container and the lid come into contact with each other in a sealed state.

Such a sealed state is maintained during normal handling because the inwardly projecting edge 27 has sufficient strength. However, if the lid C is forcibly removed, the thin portion 33 will be cut first, so that the opening of the lid due to mischief will be immediately known.

When opening the lid C, the tear tab 36 is manually pinched and pulled outward. As a result, the peripheral skirt portion 25 on the lower side of the thin portion 33 forms a strip shape and is separated from other portions of the lid C. When the portion having the inwardly projecting edge 27 disappears in this way, the lid has no means for restraining the container, so that the lid can be removed. The removed lid can be applied to the container after taking out the contents of the container R. After that, the peripheral top 23, the peripheral descending wall 24 and the peripheral skirt
The remaining part of 25 contacts the synthetic resin part 5c around the opening edge of the container R to keep the sealed state. The knob 37 is used when the lid C is opened later.

The notch 35 can be provided in a place other than the one shown,
It must be installed avoiding the corners. The corners of the lid are important in maintaining a correct fit in the container,
If the notch 35 is near the corner, its rigidity is lowered and it is easily deformed, which is not preferable.

The vertical ribs 31 serve to reinforce the corners of the lid C and also to receive the lower end of the peripheral skirt portion 25 of the lid immediately above when stacking the lids vertically, as shown in FIG. Be useful. Further, the upward ribs 30 on the peripheral edge contact the inside of the peripheral skirt portion 25 of the upper lid during stacking, as shown in FIG. 17, to enable stable stacking.

FIG. 18 shows a modification of the lid C. In this example, the peripheral descending wall 24
The lower end is not connected to the top plate portion 21, but the top plate portion 21 is directly connected to the peripheral top portion 23. The thin portion 33 ′ is formed on the peripheral top portion 23. Therefore, the peripheral skirt portion 25 is completely removed when the package is opened.

In the modification of the lid C shown in FIG. 19, the thin portion 33 ″ is provided immediately above the inward protruding edge 27, and the upward stacking rib is provided.
30 is omitted.

As described above, the lid C has excellent sealing property, easy opening operation, and excellent sealing property after opening.

[Effect of device]

As described in the above embodiments, the composite container of the present invention has a small radius of curvature and a small bending angle due to the cut lines formed in the bent portion or the curved portion of the blank plate constituting the main body of the present invention. Even if the blank plate is thick and stiff, it can be bent or bent correctly, and therefore the work of setting the blank plate in the cavity of the molding die for molding and attaching the synthetic resin portion to the blank plate can be performed. It is possible to perform accurately, and the cut line is formed in the length of the range that does not reach the area of the joint of the synthetic resin part and the blank plate or escapes it, so that it is possible to perform injection molding of synthetic resin. The resin can be prevented from wrapping around the score line in the mold, and as a result, a high-quality composite container can be manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view showing a composite container together with its lid, FIG. 2 is a perspective view of a handle, FIG. 3 is a perspective view showing a blank plate, and FIG.
The figure is a partial cross-sectional front view of the composite container, FIG. 5 is an enlarged view of the left half of FIG. 4, FIG. 6 is a right side view of FIG. 4, and FIG.
Fig. 8 is a cross-sectional view of the figure taken from the left side, and Fig. 8 is VIII in Fig. 7.
FIG. 9 is an enlarged view of a portion of FIG. 7, FIG. 9 is an enlarged view of portion IX of FIG. 7, FIG. 10 is a sectional view taken along line XX of FIG. 7, and FIG. Figure shows a modified example of Figure 11,
FIG. 13 is a view showing a modified example of FIG. 11, FIG. 14 is a vertical sectional view of a portion including a cut line, FIG. 15 is a plan view of a lid, and FIG.
FIG. 17 is a sectional view taken along line XVI-XVI in FIG. 17, FIG. 17 is a sectional view taken along line XVII-XVII in FIG. 15, and FIGS. 18 and 19 are sectional views showing modifications of FIG. R: Composite container, C ... Lid, 2 ... Blank plate, 2c ...
Blank plate top opening, 3 ... gap, 4 ... bottom, 5a, 5b,
5c, 5d …… Synthetic resin parts, 6a, 6b …… Reinforcing and stacking ribs, 8a, 8b …… Protrusions, 9 …… Band-like handles, 14 …… Compound container upper opening peripheral edge, 15 …… Protruding edge, 19… … Score line, 19a
…… Ruled line, 19b …… Half cut, 19c …… V-cut groove, 21 ……
Top plate part, 22 ... peripheral part, 23 ... peripheral top part, 24 ... peripheral descending wall, 25 ... peripheral skirt part, 27 ... inward projecting edge, 28
...... Concave groove, 30 ...... rib, 31 ...... vertical rib, 33,33 ',
33 ″ …… Thin-walled part, 36 …… Tear tab.

Continuation of the front page (72) Inventor Yukio Yoshikawa 17-11 Fujikubo, Miyoshi-cho, Iruma-gun, Saitama (56) References JP-A-54-92475 (JP, A) Actual development: Sho-56-150740 (JP, U) Actual Kai 53-131901 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A blank plate in which a body portion is formed by winding one plate so that both side edges thereof face each other, and a gap and a bottom portion between both side edges of the blank plate are filled and an upper opening of the blank plate is formed. It consists of a blank plate and a synthetic resin part formed integrally with the peripheral plate so as to cover the peripheral part, and forms a cut line along the ridge direction in the bent part or the curved part of the blank plate, and this cut line is A composite container characterized in that it does not reach the area of the joint between the synthetic resin portion and the blank plate or escapes from it. 2. The composite container according to claim 1, wherein a synthetic resin protrusion is integrally formed outwardly at a synthetic resin portion forming a peripheral portion of the blank plate.