JPH0352653Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a simple plastic container commonly called a food bag.

[Prior art and its problems]

Container body (container structure) and lid (container structure)
Simple plastic containers formed integrally through bent parts are widely used in the food industry because they can be mass-produced extremely easily by vacuum forming or pressure forming. This type of container can be opened by bending the lid and securing it to the container body, or by untying the lid, but with conventional containers, it takes a considerable amount of time and effort to attach and release the lid. There was a problem that the attachment was not secured properly.

[Purpose of invention]

This invention was made in view of the above circumstances,
To provide a simple plastic container whose lid can be reliably fastened and released with one touch when opening and closing.

[Structure and action of the device]

In order to achieve the above object, the present invention provides a locking protrusion on the periphery of the mouth of a first container structure such as a container body so as to protrude outward from the periphery of the mouth; A locking hole into which the locking protrusion is inserted and locked is formed in the opening periphery of a second container component such as a lid whose opening periphery is externally fitted onto the mouth periphery of the body. When the first container structure and the second container structure are fitted together, the locking protrusion is directly inserted into the locking hole and locked.

[Example of idea]

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 1 to 5. In the figures, 1 is a container body (a
2 is a lid (second container structure), and these are integrally molded with a bent part 3 interposed therebetween. A step 4 is formed on the periphery of the opening of the container body 1, and a locking protrusion 5 projects outward from the periphery of the opening on the opposite side of the periphery of the opening from the bent part 3. It is provided. This locking protrusion 5 extends the step part 4 outward to form a horizontal part 5a whose width becomes narrower as it approaches the tip, and the lower part of this horizontal part 5a is connected to the side surface of the container body 1. The slanted portion 5a is inclined obliquely upward relative to the horizontal portion 5a, and the corner from the stepped portion 4 to the horizontal portion 5a is a curved portion r.

On the other hand, a fitting edge side 66 is formed on the periphery (mouth periphery) of the lid 2, and the fitting edge side 66 is formed on the inside to be externally fitted onto the stepped portion 4 of the container body 1, and the fitting edge side 66 is On the opposite side from the portion 3, there is a protrusion 7 which has a similar shape to the locking protrusion 5 of the container body 1 and is slightly larger.
A locking hole 8 into which the locking projection 5 is fitted and locked is bored in the projection 7. The inner surface 7a from the lower end of the projection 7 to the locking hole 8 is
It is formed into a convex curved surface that is convex on the inside of the lid body 2. Then, when the fitting edge 6 of the lid body 2 is externally fitted onto the stepped portion 4 of the container body 1 and the container body 1 is closed with the lid body 2, the entire locking projection 5 is inserted into the projection portion 7. At the same time as the locking projection 5 is fitted, the tip of the horizontal portion 5a of the locking projection 5 is fitted into the locking hole 8 of the projection 7, so that the closed state of the lid body 2 is maintained. has been done. Note that in the closed state, the tip of the locking protrusion 5 is provided so as to protrude outward from the locking hole 8.

The fitting edge 6 of the lid 2 is sloped, starting from the bent portion 3 and gradually increasing in height as it goes to the end of the lid 2, as shown in FIG. It is arranged at the same position as the stepped portion 4 of the container body 1, and has a structure in which the cutting lines a and b of both can be made horizontally.

Therefore, in the simple plastic container configured as described above, a locking protrusion 5 is provided on the periphery of the opening of the container body 1.
is provided, and a locking hole 8 is formed in the fitting edge 6 of the lid body 2. Therefore, when closing the container, the fitting edge 6 of the lid body 2 is attached to the stepped portion 4 of the container body 1. By simply fitting the locking protrusion 5 into the locking hole 8, the locking protrusion 5 is inserted into the locking hole 8 and locked, and the closed state of the lid body 2 is maintained.

In addition, as a means for locking the container body 1 and the lid 2, it is also possible to have a structure in which a locking protrusion formed on the lid is inserted into a locking hole formed in the container body. . With this type of structure, hold the container body with your left hand, hold the lid body with your right hand, and move the tip of the locking protrusion back to the locking hole position, insert the locking protrusion into the locking hole, and then close the lid again. You have to move your body forward. Therefore, this kind of opening/closing work that requires speed is cumbersome and inefficient. However, in the container of the present invention, the inner surface 7a from the lower end of the protrusion 7 to the locking hole 8 is formed into a convex curved surface that is convex toward the inside of the lid 2. By simply pressing down, the locking protrusion 5 is smoothly guided along the inner surface 7a, and can be smoothly inserted into the locking hole 8 with one touch. Further, when opening the container, when the container body 1 and the lid 2 are disengaged, the locking protrusion 5 is simultaneously removed from the locking hole 8.

Here, in the locking protrusion 5, the lower part of the horizontal part 5a is the locking part 5b as described above, and the inclined part 5b functions as a rib to maintain the rigidity of the horizontal part 5a appropriately. Furthermore, since the portion from the stepped portion 4 to the horizontal portion 5a is a curved portion r, the strength of the horizontal portion 5a is further increased. For this purpose, a suitable snap effect is imparted to the locking projection 5, and the locking projection 5 is fitted into the locking hole 8 with a single touch.

In particular, in the above structure, simply by pressing the lid 2 from above, the locking protrusion 5 is moved into the locking hole 8 by the snap effect.
Therefore, if the locking projection 5 is made up of only a horizontal portion, the locking projection 5 will not break due to the pressing force when it is inserted, and the lid will not close. However, while supporting the horizontal portion 5a of the locking protrusion 5 by the inclined portion 5b,
Since the corner from the stepped portion 4 to the horizontal portion 5a is a curved portion r, the strength of the locking projection 5 is increased, and the tip of the locking projection 5 is connected to the inner surface 7a of the projection 7.
Since it fits into the locking hole 8 while sliding on the convex curved surface of the locking projection 5, the locking protrusion 5 will not break even if the lid body 2 is pressed down from above. Therefore, the lid can be closed with one hand by making full use of the snap effect, and the opening/closing operation is excellent in workability and reliability.

Furthermore, since the structure is such that the stepped portion 4 of the container body 1 and the fitting edge 6 of the lid body 2 are placed in the same position, and the die-cutting cutting lines a and b of both can be made horizontal,
It is possible to accurately cut out molds using a cutter with a simple structure.

By the way, in the above, the container body 1 is
The lid body 2 is a second container structure whose opening periphery is externally fitted to the opening periphery of the first container structure, but conversely, the container body is attached to the second container structure. The lid may be used as the first container structure. Further, the positions at which the locking protrusions 5 and the locking holes 8 are formed are not limited to the illustrated positions, and the number thereof is also arbitrary. Furthermore, the locking hole 8 is not limited to one formed by penetrating the member, but may be formed by forming a recess in the member.

[Effect of idea]

As explained above, the simple plastic container of the present invention is provided with a locking protrusion on the periphery of the opening of the first container structure, projecting outward from the periphery of the opening, and A locking hole into which the locking protrusion is fitted and locked is formed in the opening periphery of the second container structure, into which the opening periphery is externally fitted; Since the locking protrusion is fitted into the locking hole as the second container structure is fitted, it can be opened and closed extremely easily and reliably with a single touch. Also,
Since the inner surface of the second container structure from the lower end of the protrusion to the locking hole is formed into a convex curved surface,
By simply pressing down on the second container structure, the locking protrusion smoothly fits into the locking hole, making it easy to lock the container structures together. Furthermore, the smooth insertion and the increased strength of the locking protrusion due to the curved part and the inclined part make it possible to lock the locking protrusion by pressing down on the second container structure from above. Even if the locking protrusion is inserted into the locking hole, breakage of the locking protrusion can be prevented. There is no need to worry about the locking protrusion breaking, so you can fully utilize the snap effect and close the lid with one hand or with a single touch, resulting in excellent opening/closing efficiency and reliability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view in an open state, Fig. 2 is a side view of the same, Fig. 3 is a front view of the same in a closed state, and Fig. 4 is an enlarged side view of the same essential parts. 5 is an enlarged sectional view taken along the - arrow in FIG. 3. DESCRIPTION OF SYMBOLS 1... Container body (first container structure), 2... Lid (second container structure), 4... Step part, 5... Locking protrusion, 5a... Horizontal part, 5b... Inclined part ,7...
Projection, 7a...inner surface, 8...locking hole, r...curved portion.

Claims (1)

[Scope of utility model registration request] A first container structure 1 and a second container structure 2 whose opening periphery is fitted onto the opening periphery of the first container structure 1.
In this simple plastic container, a step part 4 and a locking protrusion 5 are formed on the periphery of the opening of the first container structure 1, which are formed outside the periphery of the opening. The locking protrusion 5 is provided to protrude in the direction, and the locking protrusion 5 is fitted into the periphery of the opening of the second container structure 2 when the first container structure 1 and the second container structure 2 are fitted together. A projection 7 having a locking hole 8 to be locked is formed, and the tip of the locking projection 5 projects outward from the locking hole 8 when the lid is closed, and the lower end of the projection 7 The inner surface 7a from the locking hole 8 to the locking hole 8 is formed into a convex curved surface that is convex toward the inside of the container, and the locking protrusion 5 is a horizontal portion that is fitted and locked into the locking hole 8 and continuous with the step portion 4. 5a and
The horizontal part 5a is supported by an inclined part 5b that is inclined outward with respect to the side surface of the first container structure 1, and the corner from the stepped part 4 to the horizontal part 5a is a curved part. A simple plastic container characterized by being made of r.