JPH10278935A - Plastic container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic container which is appropriate especially to be used as a returnable container for liquid such as seasoning, medium and detergent. SOLUTION: The plastic container comprises a body 1 having a folding rib 11 around a periphery of an opening and a lid 2 having a hanging rim 22 covering the folding rib 11 outward wherein the container is rectangular when viewed in a plan. A horizontal base 25 for mounting bottom corners of a container to be stacked above and a holding protrusion 26 connected outward from the horizontal base 25 for holding the bottom corners of the container are provided on respective corners on an upper face of the lid 2 whose center swells from the periphery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a lid and a container having a structure suitable for being used as a so-called container (box), particularly a container for liquids such as seasonings, chemicals and detergents. The present invention relates to a plastic container.

[0002]

2. Description of the Related Art When transporting raw materials and semi-finished products from a subcontract factory to a product factory, a reusable container is often used in order to keep the packaging material cost low. For example, when delivering soy sauce used as a seasoning to a food manufacturing plant, the soy sauce is sealed in a polyethylene bag or blow-molded container and stored in a corrugated paper or plastic outer box. It has been carried out that the outer box after use is collected as much as possible and used repeatedly as a returnable container.

The following five main functions are required for such a container. (1) It should have strength enough to withstand repeated use. (2) It should have excellent protection of contents. (3) It should be able to be transported and stored efficiently. It is required that the useless space be as small as possible. (4) Cleanliness is required. That is, it is required that water can be easily washed and drained easily. (5) It is required to be space-saving at the time of collection, that is, when not in use. That is, it is required to be able to be folded when not in use, to be able to accommodate lids or containers in a stacked manner, and the like. It is essential to keep (2) the protection of the contents and (4) cleanliness especially in returnable containers in the food field.

[0004]

In recent years, plastic containers have been manufactured at low cost, and transmissive containers almost satisfying the above requirements have been provided. When used as a returnable container, it was hard to say that it still had sufficient functions. For example, in the case of a returnable container for liquid substances, (2) it is necessary to enhance the protection of the contents, but no returnable container that can securely fix the lid to the container has been found. In order to solve this deficiency, it is conceivable that the lid is fixed to the container by using a flat polypropylene band when using a returnable container.However, such flat banding may cause instability when stacking containers. (3) Efficient transportation and storage are impaired. In addition, (1) irregularities are often provided on the lid and container to increase the strength, but as a result, the drainage after washing is inferior, rainwater collects on the top of the lid, and (4) cleanliness Was often impaired.

[0005] (3) In order to enable efficient transportation and storage, it is desirable not only to stack the returnable containers in the vertical direction but also to arrange them closely in the horizontal direction to minimize wasteful space. So, make the return container a substantially rectangular plane,
The folded rib at the periphery of the opening of the container is formed as thin as possible so that the difference in area between the bottom surface and the top surface of the container is reduced. Although the folded rib itself is indispensable for increasing the strength of the container (1),
If this folded rib is made thin, it will be harder to catch the fingers, and it will be difficult to handle and transport the returnable container.
(3) A situation contrary to efficient transportation was caused.

Accordingly, the present inventor has studied a structure of a plastic container particularly suitable for a container through which a liquid material can pass.

[0007]

SUMMARY OF THE INVENTION As a result of the study, what has been developed is a substantially rectangular container having a flat surface comprising a container having a return rib on the periphery of an opening and a lid having a hanging edge which covers the return rib. There is a horizontal base for mounting the bottom corner of the container to be stacked on the upper side of each corner of the lid whose center is raised from the peripheral part, and a horizontal base is provided outside the horizontal base. And a holding projection for holding a bottom corner of the container.

[0008] The plastic container is characterized in that a drainage hole is formed at the upper end of the folded rib at the periphery of the opening in the container.

Further, these plastic containers are formed by bending each side wall of the container inward and forming a handle on a folded-back rib.

[0010] As described above, since the top of the lid of a plastic container used as a pass-through container is formed to have a shape in which the central portion is raised from the peripheral edge, contents leaked due to rainwater, accidents and the like can be removed. Accumulation on the upper surface can be prevented. Further, for each corner of the upper surface of the lid, a horizontal platform for mounting the bottom corner of the container stacked upward, and a bottom provided at the bottom of the container connected to the horizontal platform outward. With the provision of the holding projections, the stacked upper containers are stably held, and the same containers can be stacked in multiple stages. Furthermore, by combining the top surface shape of the lid with the horizontal base at each corner, the flat band hung on the returnable container almost adheres to the upper surface of the lid, so that the bottom surface of the container stacked above was stretched. A stable stacking was possible without being pushed up by the flat band.

Further, since a drain hole is formed at the upper end of the return rib at the periphery of the opening in the container, if the container is placed face down after washing with water, it is possible to prevent washing water from remaining in the return rib. .

Further, since the side walls of the container are bent inward to form a handle on the return ribs, the return ribs at the periphery of the opening of the container are formed to have a small width, but the fingers can be easily gripped and the product is transported. It became an easy container.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an example of the plastic container of the present invention, FIG.
FIG. 3 is a bottom view.

The container of this embodiment is a bag used for accommodating an inner bag made of polyethylene or a blow-molded container (not shown) provided with an inlet so as to be able to support the transportation and storage of liquid materials. It is formed in a container called an in-container (BIC), and is composed of a bottomed prism-shaped container 1 having an opening on the upper surface, and a lid 2 sized to cover the upper opening of the container 1. The outer peripheral portion of the upper edge of the container 1 and the four corners of the lid 2 are each formed in a substantially square planar shape as if they were cut out linearly. Both the container 1 and the lid 2 are made of integrally molded plastic. A locking claw 21 is provided at one diagonal corner of the lid 2, and the locking claw 21 is engaged with the lower edge of the folded rib 11 of the container 1 to close the container 1 and the lid 2. Fixed to state. At this time, the hanging edge 22 formed on the peripheral edge of the lid 2 covers the outer side of the return rib 11 in the container 1, so that the sealing performance of the container is improved. In addition, on the upper surface of the lid 2, there is provided an extraction hole 23 for taking out the injection port provided in the inner bag and mounting it on the lid 2.

As shown in the cross-sectional views of FIGS. 4 and 5, the lid 2 has its central portion raised from the peripheral edge, that is,
It is formed in a shape gently inclined downward from the center to the periphery. The disk-shaped projection 24 formed at the center of the lid 2 serves as a suction surface of a transfer suction cup in the production line of the lid 2.

At the four corners of the upper surface of the lid 2, a horizontal base 25 on which the four bottom corners of the stacked containers are placed when the same containers are stacked upward, The holding projection 26 is provided continuously. The inside of the holding projection 26 is formed into a curved surface along the bottom corner of the stacked containers, and is formed to be convex above the horizontal base 25, so that the four corners of the bottom of the stacked containers are securely formed. Can be held. If the horizontal base 25 is formed at the same height as the disk-shaped projection 24 formed at the center of the lid 2,
Since the bottom surfaces of the containers stacked above are supported at these five locations, more stable stacking is possible.

When storing and transporting and storing a package in a container, including when the container is used as a returnable container, a polypropylene flat band is securely fixed to the container by hanging it over a cross, and the cover is closed. It is conceivable to prevent detachment. FIG. 6 is a plan view of the container showing a state in which the flat bands 3a and 3b are hung in two rows, FIG. 7 is a front view thereof, and FIG. 8 is a bottom view thereof. To prevent the flat bands 3a and 3b hung on the container from shifting,
A small projection 27 is formed on the upper surface of
It is desirable to cut out a part of. In the container according to the present invention, even when the flat band is hung in this manner, the flat band 3a,
3b is in close contact with the horizontal base 25 without any gap, so even if containers stacked on a flat
It does not collapse even when stacking individual pieces.

Since the container according to the present invention is a substantially rectangular container in a plane, a large number of the containers can be densely arranged in the horizontal direction, while the folded rib 11 of the container 1 and the hanging edge of the lid 2 can be arranged.
Since each corner of 22 is notched, the locking claw 21 for fixing the lid in a closed state even when closely arranged comes into contact with the locking claw 21 of another adjacent container and the hanging edge 22 of the lid 2. Without lid 2
There is no danger that the hook will come off or the locking claw 21 will be damaged. As described above, since the locking claw 21 is not provided on the side surface of the lid 2 as in a conventional container, the hanging edges 22 of the lid 2 that come into contact with each other can be brought into more close surface contact with each other, The arrangement state of the containers is stabilized. Thus, the containers according to the present invention can be densely and stably arranged regardless of the length and width.

In a container that can be used in the food field, it is important that the container is easy to clean in order to maintain its cleanliness and that it is easy to dry. In the container of the present example, in addition to taking care of eliminating small gaps in the entire container and making it difficult for dirt to collect, the lid 2 is made to have a shape in which the central portion is raised from the peripheral portion,
As shown in FIG. 9, a drain hole 13 was formed at the upper end of the folded rib 11 of the container 1. Therefore, if the lid 2 and the container 1 are placed face down after being washed with water, the washing water can be drained without washing water remaining in the folded ribs 11.

FIG. 10 is a bottom view of the container showing an example in which each side wall of the container 1 is curved inward and a handle 14 is formed on the folded rib 11. Increasing the volume of the container 1 increases the weight of the contents. In a returnable container exclusively used for transportation and storage, the width of the folded rib 11 at the periphery of the opening of the container 1 needs to be reduced in order to minimize the occupied area while securing the strength of the container itself. The folded ribs 11 are difficult to handle with fingers and are inconvenient to handle when heavy. In the container according to the present invention, each side wall of the container 1 is curved inward to form the handle 14 on the return rib 11, so that the width of the return rib 11 can be reduced and the finger grip is improved, and Easy transportation was ensured.

The functions required for the returnable container include:
The space can be saved at the time of collection, that is, at the time of non-use. However, in the plastic container according to the present invention, the containers 1 and the lids 2 are fitted and overlapped. FIG. 11 is a side view showing a state where containers 1 are overlapped, and FIG. 12 is a side view showing a state where lids 2 are overlapped. If the containers 1 and the lids 2 are completely fitted and adhered to each other when they are stacked, there is a possibility that they will not come off from each other.
A support step 28 is formed at the base of the side surface of each holding projection 26 at the four corners of the lid 2 to function as a stopper for preventing adhesion.

[0022]

According to the plastic container of the present invention,
A large number of containers can be stably stacked while the flat band is hung, thereby enabling efficient transportation and storage. Further, the cleaning is easy and the drainage after the cleaning is excellent, so that the cleanliness can be satisfied. Furthermore, the container has been made more convenient to handle and transport without sacrificing space saving. As described above, the plastic container according to the present invention is an ideal container that sufficiently satisfies the function required for a container that is particularly suitable for a liquid container such as a seasoning, a chemical, or a detergent.

[Brief description of the drawings]

FIG. 1 is a front view of a plastic container of the present invention.

FIG. 2 is a plan view of the container.

FIG. 3 is a bottom view of the container.

FIG. 4 is a sectional view taken along the line AA in FIG. 1;

FIG. 5 is a sectional view taken along line BB in FIG.

FIG. 6 shows two flat bands on a plastic container according to the present invention.
It is a top view which shows the state which hung on the row.

FIG. 7 is a front view showing a state in which flat bands are hung on the container in two rows.

FIG. 8 is a bottom view showing a state where the flat bands are hung on the container in two rows.

FIG. 9 is a plan view of the container.

FIG. 10 is a bottom view of the container showing an example in which each side wall of the container is curved inward.

FIG. 11 is a side view showing a state where containers are overlapped with each other.

FIG. 12 is a side view showing a state in which lids are overlapped.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 container 2 lid 11 folded rib 13 drain hole 22 hanging edge 25 horizontal base 26 holding projection

Claims (3)

[Claims] 1. A container having a substantially rectangular shape in plan view, comprising: a container having a folded rib at the periphery of an opening; and a lid having a hanging edge that covers the folded rib, the lid having a central portion protruding from the periphery. For each corner of the upper surface of the container, a horizontal platform for mounting the bottom corner of the container stacked above, and a continuity outside the horizontal platform for holding the bottom corner of the container. A plastic container provided with a holding projection. 2. A drain hole is formed at an upper end of a folded rib at a periphery of an opening in a container.
A plastic container as described. 3. The plastic container according to claim 1, wherein each side wall of the container is bent inward to form a handle on the folded-back rib.