JPH0737949U - Folding plastic container - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the volume by flattening the entire plastic container with a circular or elliptical bottom. [Structure] The vertical folding line 11A and the branch folding line 11B are folded to flatten the main body. Fold along the second folding line 12 to make the bottom surface 2 parallel to the flattened main body portion. The bottom surface 2 is crushed using the third folding line 13. As a result, the entire container 1 is flattened. The fourth fold line 14 helps in crushing the bottom surface 2.

Description

[Detailed description of the device]

[0001]

【Technical field】

 This invention relates to a foldable plastic container.

[0002]

[Background technology]

 Containers made of plastics such as thermoplastics are widely used as containers for scents such as kitchen detergents, household detergents, laundry detergents, shampoos and rinses, and various shapes are available on the market. On the market. Most of these plastic containers are bottomed with an opening at the top. The plastic container mainly has a function of preserving its value, state, etc. during transportation and storage of its contents, but various functions are added to it. For example, measures are taken to prevent the containers from collapsing when they are loaded in cardboard boxes. This is achieved by increasing the buckling strength of the container, and concretely, it is realized by devising the shape and thickness of the container.

Recently, the problem of dust due to waste products after use has become serious. Speaking of plastic containers, there is a problem that it is difficult to collect garbage efficiently because the containers are discarded in a large volume after use. A device for reducing the volume of the container is required for the plastic container.

Japanese Laid-Open Patent Publication No. 3-148451 discloses a plastic foldable container aimed at solving such a technical problem. This container has a bottom divided into two parts for easy folding, and an elongated groove with a V-shaped cross section is formed between them. In addition, fold lines extending in the vertical direction are formed on the side surfaces from the positions of both ends of the V-shaped groove.

This plastic foldable container has a problem of high molding cost because it has a special shape. Also, it is unstable because it is kept upright at the two peaks on both sides of the V-shaped groove on the bottom surface.

The folding container disclosed in EP-A-511596 has good stability because the bottom surface is flat. This folding container has V-shaped and inverted V-shaped fold lines provided at the upper and lower positions of its peripheral wall and a fold line extending in the longitudinal direction connecting the start points of these V-shaped and inverted V-shaped fold lines. Are formed symmetrically on the peripheral wall of the container. As a result, the central part of the body of the container is folded flat. In addition, since a fold line that laterally circulates the peripheral wall is formed at the height of the starting point of the V-shaped and inverted V-shaped fold lines, these fold lines form the upper and lower bottom portions of the container. Are folded so that they overlap the flat body.

However, since the upper bottom portion and the lower bottom portion are folded at a fold line that circulates laterally around the peripheral wall of the container, the body portion between the fold line and the upper bottom or the lower bottom is not folded any more. Remain in. Therefore, there is a limit to the reduction of container volume, and it is still bulky when it is discarded. Also, this folding container is suitable for those with a square bottom, but not for those with a circular or elliptical bottom.

[0008]

[Disclosure of device]

 The purpose of this invention is to flatten a plastic container having a circular or elliptical bottom to further reduce the volume.

The present invention is applied to a plastic container having a circular or elliptical bottom surface and a body wall rising from the peripheral edge of the bottom surface. Here, the term circular or elliptical does not necessarily have to be circular or elliptical. Shapes that are almost circular and almost oval are also included.

In the plastic container according to the present invention, a vertical folding line formed in the longitudinal direction of the body wall and two branch folding lines diagonally branched from the bottom end of the vertical folding line toward the bottom surface. A pair of first fold lines to be formed are symmetrically formed on the body wall. The first broken line has an inverted Y shape. This first fold line is for folding the main part of the container flat.

In the container according to the present invention, a second folding line is formed on the main portion of the flatly folded body for folding the portion near the bottom substantially at a right angle. The second fold line is formed on the trunk wall in a horizontal direction over substantially one circumference at a height position where the vertical fold line is branched to the branch fold line.

A major feature of the container according to the present invention is that a pair of third folding lines are formed to further fold the portion of the container, which is folded substantially at a right angle, close to the bottom. The third fold line is formed parallel to the bottom face so as to connect the tips of the branch fold lines extending to near the bottom face.

By this third fold line, the portion close to the bottom of the body (the body portion between the second fold line and the bottom surface) is also flatly folded, and the bottom surface is laid on it. In this way, the body and bottom of the container are all flat, and the volume of the plastic container is considerably reduced.

Preferably, the second fold line is formed at a height position corresponding to the radius of the circular bottom surface or the length of the short axis or the long axis of the elliptical bottom surface from the bottom surface. This makes the bottom surface parallel to the flattened body.

In a preferred embodiment, between the third fold line and the bottom surface, a fourth fold line that extends around the trunk wall is formed parallel to the bottom surface. The fourth fold line is effective in completely flattening the part near the bottom of the body when the material of the container is hard.

The fold line is formed so as to present a ridge or a groove outward depending on the bending direction. This facilitates the folding work.

When folding the container, the opening of the container is opened. After folding the container, the opening is closed with a cap. Since air does not enter the container, the container is kept flat.

When an upper bottom similar to the bottom is provided on the upper part of the container as well, a branch fold line of the first fold line, on the body wall near the upper bottom, A second fold line and a third fold line (and a fourth fold line if necessary) are formed.

Since the container according to the present invention is a cylindrical one having a circular or elliptical bottom surface, the buckling strength of the container can be kept higher than that of a polygonal container including a square, and the amount of resin used can be increased. Can be reduced.

[0020]

【Example】

 With reference to FIGS. 1 to 3, a plastic container 1 has a substantially circular bottom surface 2, and a body wall 3 rises from the bottom surface 2. The body wall 3 has a substantially cylindrical shape, and its diameter gradually decreases toward the upper part. The torso wall 3 is connected to the mouth through a shoulder portion whose diameter is rapidly reduced. A screw thread is formed at the mouth, and the cap 4 is detachably screwed.

On the body wall 3, two vertical folding lines 11A extending in the vertical direction are formed at angular intervals of 180 degrees. The upper end of the vertical folding line 11A extends to near the mouth portion, and the lower end thereof extends to the position of the second folding line 12 described later. Two branch fold lines 11B extend in an inverted Y shape from the respective lower ends of the vertical fold lines 11A. The angle formed by the branch fold line 11B is 90 degrees or slightly larger. The lower end of the branch fold line 11B is located slightly above the bottom surface 2. The first folding line is constituted by these vertical folding lines 11A and branch folding lines 11B.

The second folding line 12 is formed on the trunk wall 3 in the lateral direction in parallel with the bottom face at a height position where the branch folding line 11B is branched from the vertical folding line 11A. The height h from the bottom surface to the second folding line 12 is preferably set to be approximately equal to the radius of the bottom surface 2. As a result, the bottom surface 2 becomes substantially flat with the peripheral wall folded flat as described later.

For convenience of explanation, of the body of the container, the upper part and the lower part of the second fold line 12 are referred to as the main body and the lower body (a part close to the bottom of the body).

A third fold line 13 is formed on the body wall 3 so as to connect the lower ends of two branch fold lines 11B branched from one vertical fold line 11A.

Further, a fourth fold line 14 is formed between the third fold line 13 and the bottom surface 2 over the circumference of the body wall 3 in parallel with the bottom surface 2. The fourth folding line 14 may be omitted. The fourth fold line 14 is preferably provided in the case of a container made of a hard plastic material.

Since the vertical folding line 11A, the branch folding line 11B, and the fourth folding line 14 are mountain-folded, as shown in FIG. 4, they are formed as protrusions protruding outward (when viewed from the inside, Has become a groove). Since the second and third folding lines 13 are valley-folded, they are formed so as to appear as grooves on the outside (projecting to the inside), as shown in FIG. However, half of the second fold line 12 is mountain-folded, but there is no problem in folding.

Such a plastic container 1 is molded by blow molding. Preferably, the vertical fold line and the parting line for blow molding should match so that the appearance will be clean.

As an example, the plastic container 1 can be folded in the following procedure.

As shown in FIG. 6, the body wall 3 is folded along the vertical folding line 11 A and folded flat over the main body portion and the shoulder portion. At this time, the branch fold line 11B is also folded to some extent. Also, the body wall 3 is broken along the second fold line 12.

Next, as shown in FIG. 7, the body wall 3 is folded at the position of the second folding line 12 so that the lower body portion is substantially perpendicular to the flattened main body portion. The bottom surface 2 is substantially parallel to the flattened main body.

Finally, when the bottom surface 2 is pushed down, the body wall 3 is folded in a valley fold at the position of the third folding line 13, and the lower body portion is also flattened. At this time, the fourth fold line 14 facilitates folding of the body wall 3 into a mountain fold at the boundary between the bottom surface 2 and the body wall 3. The mouth is covered with the cap 4, and the mouth is sealed. Since air does not enter the flattened container 1, the container 1 keeps the flattened state. This is the state shown in FIG.

The order of folding the container 1 is not limited to the above. Since the fold line is formed in advance at the place to be folded, the container is finally flattened as shown in Fig. 8 in any order.

In a container in which the body of the container has a cylindrical shape and an upper bottom surface is formed instead of the shoulder portion in the same manner as the bottom surface, near the upper bottom surface, a branch fold line and a second fold line are formed on the body wall. A line, a third fold line and, if necessary, a fourth fold line are formed.

[Brief description of drawings]

FIG. 1 is a perspective view of a plastic container.

FIG. 2 is a front view of a plastic container.

FIG. 3 is a side view of a plastic container.

4 is an enlarged sectional view taken along line IV-IV in FIG.

5 is an enlarged cross-sectional view taken along line VV of FIG.

FIG. 6 is a perspective view showing a state in which the body portion is flattened by folding along a first folding line.

FIG. 7 is a perspective view showing a state of folding along a second folding line and making a bottom surface parallel to the flattened body portion.

FIG. 8 is a perspective view showing a state in which all parts are flattened by folding along a third folding line.

[Explanation of symbols]

 1 Plastic Container 2 Bottom 3 Body Wall 4 Cap 11A Vertical Fold Line 11B Branch Fold Line 12 Second Fold Line 13 Third Fold Line 14 Fourth Fold Line

Claims (5)

[Scope of utility model registration request] 1. A plastic container having a circular or elliptical bottom surface and a body wall rising from the periphery of the bottom surface, wherein a pair of symmetrically formed body walls for folding the main portion of the body flatly. The first fold line; the first fold line is a vertical fold line formed in the longitudinal direction of the trunk wall, and two fold fold lines that are branched obliquely from the bottom end of the vertical fold line toward the bottom surface. A second fold line for folding the part of the body that is close to the bottom of the body at a right angle to the main part of the body that is flatly folded; , At the height position where the vertical fold line is branched to the branch fold line, is formed on the trunk wall in the lateral direction in parallel with the bottom surface for almost one round, and is close to the bottom of the trunk part folded at a substantially right angle A pair of third fold lines to further fold the portion; the third fold lines are close to the bottom. Nobita the branch fold lines of the plastic container folding, characterized in that it comprises a, it is formed parallel to the bottom surface so as to connect between the leading end. 2. The second folding line is formed at a height position corresponding to the radius of the circular bottom surface or the length of the short axis or the long axis of the elliptical bottom surface from the bottom surface. Folding plastic container. 3. The folding plastic according to claim 1, further comprising a fourth fold line formed so as to extend around the trunk wall between the third fold line and the bottom surface. container. 4. The folding plastic container according to claim 1, wherein the folding line is formed so as to present a convex line or a concave groove depending on a bending direction. 5. The folding plastic container according to claim 1, wherein the folding plastic container has an opening at the top, and the opening is closed by a cap.