JPH0441087Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a lidded container made of resin for storing foodstuffs, small articles, etc. in a supermarket or store.

PRIOR ART Resin containers with lids that are displayed in stores are known to have various shapes, and among them, the container 1 shown in Fig. 4 has an outward hook-shaped rim for strength. The bent portion of the lid 2 is fitted into the bent portion 1a. The cylindrical fitting part 2a of the bent part of the lid has an internal arc-shaped engaging convex part 2b along the circumference of the fitting part 2a, as shown in FIGS. 4 and 5, to ensure the fitting. It is formed on the opposite side to ensure strong engagement at this part.

Problems to be solved by the invention As described above, since the engaging protrusion 2b is formed in an arc shape along the circumference, the inward protrusion is uniform and the strength of that part is particularly strong. . Therefore, unnecessary strong force is required during fitting. For this reason, when opening the lid 2, you have to pull it hard, and the container 1
The moment the lid 2 is removed by strongly holding it, a phenomenon occurs in which the container 1 moves due to the reaction and the contents fly out. Furthermore, in order to weaken the fitting force, if the amount of protrusion of the arcuate engaging convex portion 2b is reduced, the cylindrical fitting portion 2ak of the bent portion 1a of the container 1 or the bent portion of the lid 2 is reduced.
Depending on the quality of the product, it may not be possible to securely fit the container 1 and the lid 2, so manufacturing tolerances between the container 1 and the lid 2 must be carefully controlled. Furthermore, in the lid mold,
When machining an arc-shaped recess to create an arc-shaped engagement protrusion, there are various problems in that the mold must be cut with an end mill or the like while the mold is being rotated, which increases the number of machining steps.

Means for Solving the Problems: At the cylindrical fitting part 12a of the lid 12 with the bent part 11a of the container 11, the engaging convex part 12b, which protrudes the most in the center with respect to the circumference, is moved inward by the number of circumferences. Protruding parts and lid 1
2 is formed at a position where the engaging convex portion passes through the bent portion 11a and engages with the bent portion 11a.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. In FIGS. 1 to 3, a cup-shaped container 11 made of thermoplastic resin is formed into a truncated conical shape with a slightly tapered and open mouth so that it can be easily released from the mold. For reinforcement, a hook-shaped bent portion 11a is formed outward, and the cylindrical portion serves as a fitting portion with the lid 2.

The lid 12 that covers the container 11 is also made of thermoplastic resin and has a bent portion on the outer periphery.
A cylindrical fitting part 1 having a diameter that fits into the bent part 11a of
It has become 2a. This fitting portion 12a has engagement convex portions 12b, which are a feature of the present invention, formed on the inner surface at several locations on the circumference, preferably at equal positions. The engaging convex portion 12b engages the bent portion 11 of the container 11 when the container 11 is covered.
The ridgeline 1 of the end protruding from the circumference of the engaging protrusion 12b is provided at a position passing through the depth (l) of a.
2c is formed to be a straight line in the tangential direction. That is, as shown in FIG. 2, the center portion of the engaging convex portion 12b protrudes most inwardly, and as it moves away from both sides, the amount of protrusion decreases, making it easier to deform. The key point of this invention is to engage at the central part that protrudes inward, so the ridge line 1
2c does not necessarily have to be a straight line, but may be an engaging protrusion that is an arc in the opposite direction to the circumference, and includes any shape that does not deviate from the main point of the present invention.

Function When containers 11 are filled with an appropriate amount of foodstuffs such as pickled plums in a preparation room of a supermarket, lids 12 are placed on the containers 11, and the lids 12 are pressed down by hand from above, the engaging convex portions 12b are pressed. The most protruding center portion comes into contact, and both the bent portion 11a of the container 11 and the cylindrical fitting portion 12a of the lid 12 are deformed. Since the engagement protrusion 12b of the cylindrical fitting part 12a has less protrusion as it goes from the center to both sides, the rigidity of the engagement protrusion 12b other than the center part is not particularly strong and deforms easily. In this case, the fitting portion 12a side is also deformed correspondingly without deforming the container 11 particularly much, the deformation is averaged, and the fitting can be easily performed with a small force. The engaging protrusion 12b is connected to the container 1.
Passing through the depth l of the bent portion 11a of No. 1, the bent portion 11
This results in engagement with the a end, and the engagement is ensured at the center of the largest protruding portion of the engagement convex portion 12b.

To take out the contents from the container 11 covered with the lid 12, hold the container 11 and the lid 12, respectively, and pull the lid. Since the length of the engaging part is small and the amount of protrusion changes gradually, deformation is easy and smooth, and if you open the lid 12 from one point instead of trying to open the entire surface at the same time, you can open it with a small force. It can be opened without impact. Therefore, the recoil of the container 11 when opened is small.

Effects As detailed above, the present invention has an engaging convex portion on the inner surface of the fitting portion of the folded portion of the lid, which has a straight ridge line in the tangential direction so that the amount of protrusion at the center with respect to the circumference is the largest. is protrudingly provided at a position that passes through the depth direction dimension l of the bent part of the container, so when the lid is attached and detached, the rigidity decreases as it deviates from the center of the engaging convex part, so it is easily deformed and manufacturing errors occur. This also ensures that the lid is covered. In addition, the lid can be removed with a small force, resulting in less reaction when the lid is removed, thereby reducing the risk of the contents spilling out. Furthermore, by slightly increasing the amount of protrusion at the center of the engaging convex portion, the dimensions of the fitting portion can be easily controlled without increasing the resistance during fitting. Furthermore, the same effect can be obtained even if the engaging protrusion is a circular arc in the opposite direction to the circumference. Furthermore, when manufacturing the mold for the lid, the linear engagement protrusion can be processed not by using an end mill or the like, but by using a linearly moving bit, rotary cutter, or grindstone to make a constant cut and move it in the tangential direction. I can do it,
It has many advantages such as easy processing and short processing time.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the container of the present invention and its lid, Fig. 2 is a cross-sectional view taken along line A-A of the lid of Fig. 1, and Fig. 3 is a longitudinal cross-sectional view of the lid when the lid is placed on the container. end view,
FIG. 4 is a longitudinal sectional view of a conventional container and its lid, and FIG. 5 is a sectional view taken along the line B--B in FIG. 4. 11... Container, 11a... Bent part, 12...
Lid, 12a...Cylindrical fitting portion, 12b...Engagement protrusion, 12c...Engagement protrusion ridgeline.

Claims (1)

[Scope of utility model registration request] In a case where a resin lid is placed on a hook-shaped bent portion extending outward from the mouth edge of a resin container, a central portion with respect to the circumference is attached to the cylindrical fitting portion of the bent portion of the lid with the earlier bent portion. The most protruding engaging protrusion is provided inward at several locations around the circumference, and is formed at a position where the engaging protrusion passes through the bent part and engages when the lid is put on. A container with a lid made of resin.