JPS63248636A - Locking mechanism of throwaway weak vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] A locking mechanism that closes the lid with one touch in a disposable, weak container integrally molded from a film-like synthetic resin.

[Prior art]

When selling products in weak, disposable containers that are integrally molded with film-like synthetic resin into irregularities.

Final closure is usually done with cellophane tape, staples, or rubber bands. There are many inventions related to locking mechanisms that close with one touch, such as U.S. Patent Specification No. 3567107.
There are many other publicly known examples.

However, in general, devices equipped with a locking mechanism inevitably increase production costs, and providing a locking mechanism even in disposable and weak containers is not adopted.

〔the purpose〕

without complicating the molding process for disposable weak containers.

The goal is to enable a mechanism that snaps the lid into place with a single touch, without adding any extra materials.

〔structure〕

The lid and body are integrally molded into a concave and convex shape using a film-like synthetic resin material, and the lid and body are folded in half through the connecting part to store the product in an overlapping state. In a disposable container, this mechanism utilizes the peripheral edge of the container, provides an opening in the body, provides an uneven band in the lid, and manually presses the container to generate a notch and lock the container.

[Embodiment 1] In FIG. 1, 1 is a lid, 2 is a body, and a connecting portion 3 is provided so as to be bendable, and they are integrally molded with a concavo-convex shape from a film-like synthetic resin. The figure is simplified and drawn in a simple form for convenience of explanation.

, they are usually formed into more undulating and complex shapes depending on the type of product to be stored inside, aesthetics, and physical strength. Also, for the purpose of maintaining physical strength, slightly wider peripheral surfaces 4, 4' are provided. These peripheral surfaces 4, 4' are used for stapling, cellophane tape, etc. The invention also makes use of this peripheral surface 4, 4'.

For convenience of explanation, some conventional examples will be cited and illustrated. Second
The figure is a part of the drawing of US Pat. No. 3,506,182, in which an opening 5 is provided in the peripheral surface 4'',
A curved portion 6 protrudes from the peripheral surface 4 so as to be inserted into the opening. The dimension ω of the portion where the curved portion 6 contacts the peripheral edge surface 4 is smaller than the dimension W of the curved portion, forming a kind of notch N. Generally, such recesses, V-shaped notches, etc. are used for snap-locking. A shape similar to this recessed portion will be hereinafter referred to as a notch.

FIG. 2 shows the curved portion inserted into the opening 5 by pressing the notch N with a finger, and the dimension W of the curved portion is the dimension ω of the opening 5.
There is no doubt that the notch part N will be locked while being inserted into the opening. However, when considering this from a manufacturing method point of view, we compare it with the simple shape shown in Figure 1.

There is no need to explain that the molding process is significantly complicated. Also, thin containers like the one shown in Figure 1 are transported in large numbers, stacked on top of each other.
However, it is impossible to stack them in the shape shown in Figure 2, so they must be transported and stored one by one.
Contrary to current common sense in the packaging industry, this method is not used in inexpensive products such as disposable weak containers that are transported and stored in large quantities.

FIG. 3 is an enlarged developed view showing the main parts of the present invention.

An opening 5 is provided in the peripheral edge 4' of the body of the container. FIG. 4 is an enlarged development view of the peripheral edge 4 similarly provided on the lid, in which a band-shaped portion 8 is formed by being narrowed by the parallel notches 7, 7. The reason why I wrote "parallel" instead of "parallel" is because it is not limited to exact parallelism. Notch 7,
Terminal 7 can be considered as the starting point of band 8, and the portion indicated by the dotted line will be expressed as L±starting point in the following text.

FIG. 5 is an enlarged side view of the main part of the periphery, and the lid and body are folded in half, so that the lid 1 is inverted, with the periphery 4 facing downward. There is a curved part 6 centered on the center X of the belt-shaped part, and the X line is supported at the N and N parts by the slopes s and 's. There is an opening 5 in the peripheral edge 4' of the body part 2.

=4− The slope S does not necessarily have to be a straight line, but for convenience of explanation,
The slope S is drawn as a straight line. The slope S is inclined with respect to the peripheral edge 4 by an inclination angle of 0. A line extending upwardly from the uppermost end of the curved portion is formed with an angle α that is released away from the central perpendicular line . The angle α may be close to zero or may be zero, provided that it is never a negative number. This is US patent specification 3506
The idea is fundamentally different from that shown in Figure 2, which was adapted from No. 182.

Due to the existence of the release angle α, there is no need to complicate the mold structure, mold release is easy, and there is no cost increase in the manufacturing process. Also, products with open angles like this can be stacked in multiple layers.

There is no cost increase in transportation or storage.

However, it is said that costs will not increase in this way.

In exchange for meeting the essential requirements of a cheap product.

Compared to the case in Figure 2, there is no "notch" at all, resulting in the abandonment of the "lock" function.

As shown in FIG. 5, the present invention manufactures a product without a notch and therefore has no locking function, and at a later date,
Using the action of pushing with a person's finger.

A notch is formed manually to lock 4 and 4'.

In FIG. 5, when a person pushes the N part downward with a finger, the oblique sides S gradually become horizontal. When the slope becomes horizontal,
N and N move in the direction of perpendicular X...X by a horizontal distance. Let the length of the hypotenuse be Ω.

D"Q-Qcos8 The distance between the tips N and N of the hypotenuses S and S is shortened by 2D, and the curved part 6 is distorted. As a result, when you press down the N and N parts with your fingers, N and N appear as shown in Figure 6. is pressed and bent by the oblique sides S and S to form a notch, and the curved portion 6 protrudes into the opening 5.

When the experiment was repeated, it was found that when the N part was started to be pressed down with a finger, the opening 5 first escaped downward, and when it was pressed further and the oblique side S approached the horizontal position, it plunged in with a snapping sound. That is, it can be seen that the phenomenon of the opening 5 escaping downward first takes place.

As described above, the oblique side S approaches the horizontal position, pushes the N part, reduces it to the dimension ω, and pushes it into the opening.

Since the curved portion 6, which is originally soft, has the elasticity to bend,
It is desirable that the dimension W is designed to be slightly larger than the dimension ω of the opening 5 so that the friction between the N portion and the opening 5 also adds to the locking force.

[Example 2] In the above-mentioned Example 1, an example was given in which an opening was provided on the body and a band-like portion was provided on the lid side. However, for such weak, disposable containers, there is no significant difference in effectiveness even if the lid and body are reversed. Therefore, the explanation given in the previous embodiment may be applied by simply reversing the lid and body.

The opening can be on top and the strip can be on the bottom.

[Example 3] The peripheral edges 4, 4'' are usually of a constant width, but in this type of weak container, the strength, beauty, and volume are enhanced by providing a large number of complex unevenness, so the peripheral edges 4, 4'' are The width of 4' may be partially increased to form a wide opening with a thick locking function or a wide band-like portion.

FIG. 7 is a perspective view of the vicinity of the opening 5 showing one example.

Also, depending on the thickness of the film and the shape of the container, a slit 9 may be provided along the opening, as shown in FIG. 8, to make it easier to escape downward.

〔effect〕 Without complicating the molding process for disposable weak containers.

The lid can be snapped into place with a single touch without adding any extra material.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of the present invention. Fig. 2 is a sectional view of the conventional example, Figs. 3 and 4 are enlarged developed views of the main parts of the embodiment of the present invention, and Figs. 5 and 6 are side views of the main parts.
7 and 8 are partially cutaway perspective views of other embodiments. 1 is the lid part, 2 is the body part, 3 is the connecting part, and 4.4' is the periphery. 5 is an opening, 6 is a curved portion, 7 is a cut, and 8 is a band portion.

Claims (1)

[Scope of Claims] 1. A weak container that is integrally molded with a film-like synthetic resin in an uneven manner and that can be folded in half through a connecting part between the lid and the body, with an opening provided at the periphery of the body, and an opening formed at the periphery of the lid. Parallel cuts are provided in the strip, and an undulation is created in the strip surrounded by the parallel cut, and the shape of the undulation is formed by slopes rising from both starting points of the strip and a downward curved portion connecting both slopes. ,
A locking mechanism for a disposable weak container, in which a line extending upward from the top end of the curved part has an angle that widens upward with respect to a perpendicular drawn at the center of the curved part. 2. A locking mechanism for a disposable weakened container according to claim 1, wherein the opening is at the top and the strip is at the bottom.