JP2006069646A - Water-tight resin container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-tight resin container having a high sealability of the container while being equipped with a lid opening checking means. <P>SOLUTION: This water-tight resin container comprises a body and a lid. In the water-tight resin container, at the mouth section of the body, a peripheral groove-shape fitting recess section is formed of an internal annular wall section and an external annular wall section, and a V-shape groove section is formed on the inside of the external annular wall section. At the same time, an annular closely joined surface body which is extended from the upper end of the internal annular wall section in the inner peripheral side direction is formed. On the lid, a peripheral fitting protuberance, and an engagement protuberance on the outside of the fitting protuberance are formed. When the lid is placed on the body, the fitting protuberance and the engagement protuberance of the lid are respectively fitted and engaged with the fitting recess section and the V-shape groove section of the body. At the same time, the annular closely joining surface body which is formed on the body is closely joined and sealed to the internal surface of the lid. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a water-tight resin container provided with a lid-opening confirmation means for storing savory food such as processed foods for seafood.

A water-tight resin container for displaying and selling processed foods such as seafood that is savory at the storefront so that the juice does not leak when tilted while the contents are visible from the outside, and the freshness of the food is also improved. Food is stored in a sealed state to maintain.
These containers often employ a tear strip structure that allows the lid to be opened by tearing the outer peripheral portion between the lid and the body of the container.
Since this tear strip cannot be restored once it has been torn, it is used as a means for confirming whether or not the container has been opened illegally.
Therefore, these containers are provided with a tear strip structure and a seal structure in the fitting portion between the lid and the body.
If there is even a slight gap between the lid and the body's seal part, the juice in the container will leak out due to capillary action, so the container should have an effective juice leakage prevention structure with a tear strip. .
For example, in Japanese Patent Application Laid-Open No. 2001-80662, a fitting wall provided on the peripheral edge of the lid and a fitting groove provided on the rising wall of the body are combined, and in addition, a receiving groove is provided on the lid side. Discloses a technique for improving the hermeticity of a container by closely contacting an inner wall forming a fitting groove.
However, there is a problem that the shape in which the receiving groove is provided on the lid side in this way is difficult to mold, and the accuracy of the lid shape is difficult to obtain.

JP 2001-80662 A

  In view of the above technical problem, an object of the present invention is to provide a watertight resin container having a container with a high airtightness while being provided with an opening confirmation means.

  The technical gist of the present invention is a watertight resin container comprising a body and a lid, and a fitting recess having a circumferential groove shape between an inner annular wall portion and an outer annular wall portion in the mouth portion of the body, and an outer annular wall portion thereof A V-groove is formed on the inner side of the inner annular wall, and an annular contact face is formed extending from the upper end of the inner annular wall in the inner circumferential direction. The lid has a circumferential fitting projection and an outer side of the fitting projection. When a lid is formed on the body, the fitting projection and the locking projection of the lid are fitted and engaged with the fitting recess and the V-groove, respectively. This is the point that the annular close contact face formed in the above is tightly sealed to the inner surface of the lid.

The body includes a side wall portion standing in a circumferential manner along the bottom portion and the bottom edge portion, and includes a storage portion that is surrounded by the bottom portion and the side wall portion and opens upward.
Since the close contact direction of the annular contact face body is a lid closing direction in which the lid and the body are combined, the close contact surface is pressed against the inner side surface of the cover by the pressing force when the cover and the body are combined.
Therefore, a good seal line is formed between the lid and the annular close contact face, effectively preventing the leakage of juice from the container.
A groove is formed in a circumferential shape on the inner peripheral side surface of the outer annular wall that forms the outer wall of the fitting recess, while the lid is fitted with a fitting projection that fits into the fitting recess and a periphery of the fitting projection. The purpose of forming the locking projection in the shape is that the outer annular wall portion is torn along the V-groove, and the engagement of the locking projection is released by tearing.
The cross-sectional shape of the fitting protrusion to be fitted with the fitting recess may be a substantially wedge shape, a trapezoidal shape, a quadrangular shape, or the like, but the cross-sectional shape is not particularly limited as long as it can be fitted into the fitting recess.
The body has elasticity and is molded with a soft resin in order to fit the lid, and the lid is preferably molded with a transparent hard resin with good visibility of stored items.

In the watertight resin container according to the present invention, the lid is fitted, and the fitting protrusion is provided on the lid with the fitting projection and the fitting recess is provided on the mouth with the fitting recess provided in the shape of the circumferential groove. It is equipped with an annular close contact face that closely adheres to the inner surface of the lid at the upper end of the inner annular wall on the inner side of the annular standing piece that forms the fitting recess. When the body and the body are put together, the contact surface of the annular contact surface body is pressed against the inner surface of the lid to form a seal line that is in surface contact.
The most characteristic feature of the present invention is that an annular close contact face is formed on the upper end of the body made of a soft resin, so that when the cover is pressed, the face is tightly sealed, and the engagement protrusion of the cover and the V groove of the cover are engaged. It is in the point which can be hold | maintained combining and pressing the adhesion surface together.
Thereby, the favorable sealing property in which juice does not leak is obtained.
As the lid opening confirmation means structure provided in the container, it is easy to mold because the structure of opening the lid by tearing the locking groove by releasing the strip portion and releasing the engagement of the locking projection of the lid is simple.

FIG. 3 shows an external view of an embodiment of the water-tight resin container according to the present invention.
FIG. 3A shows a state where the lid 20 is placed on the body 20, and FIG. 3B shows an exploded view of the lid 40 and the body 20.
A water-tight resin container (hereinafter simply referred to as a container) 10 stores, for example, processed food with a lot of succulent in a storage portion 24 inside the body 20 shown in FIG.
The lid 40 is molded from a transparent hard resin so that the contents and state of the stored items can be easily understood, and the body 20 is molded from a soft resin in order to fit the lid 40 tightly using elastic force.
Then, the body 20 is covered with the lid 40 by fitting the fitting protrusion 42 formed on the inner surface of the lid 40 into the fitting recess 30 formed in the circumferential groove shape in the mouth 23 of the body 20.
If necessary, a pedestal is provided on the lid 40 or the lower surface of the body 20, and the same type containers are stacked up and down to display them at the store.
The planar shape of the embodiment of the container shown in FIG. 3 is substantially rectangular. However, the planar shape of the container may be set to an ellipse, a polygon other than a rectangle, or the like as necessary, in addition to a circle as shown in FIG. The shape is not limited.
When the lid 40 is fitted to the body 20 shown in FIG. 3 (a), the locking projection 43 shown in FIG. 3 (b) has a locking groove (V groove) formed in the fitting recess 30. Since it is engaged, it cannot be removed unless the strip portion 36 provided in the circumferential shape is cut off.
The fitting structure and removal method of the lid 40 will be described later.
FIG. 2 shows a view of a part of the container 10 cut out in the vertical direction.
FIG. 2 (a) shows a state where the lid 40 is put, and FIG. 2 (b) shows a state before the lid 40 is put.
As shown in FIG. 2 (b), the body 20 has a side wall portion 22 standing in a circumferential manner along the edge of the bottom portion 21, and a storage portion 24 that opens upward is formed inside thereof.
The body 20 forms a fitting recess 30 having a substantially U-shaped cross section by branching the upper end of the side wall 22 into an inner annular wall 32 and an outer annular wall 33.
The lid 40 is formed with a fitting protrusion 42 that is annularly projected along the peripheral edge of the inner side surface 41a, and is fitted into the fitting recess 30 as shown in FIG. Block it.

The schematic diagram which expanded the cross-section end surface of the fitting recessed part 30 vicinity in FIG. 2 is shown in FIG.
As shown in FIG. 1 (b), the fitting protrusion 42 is suspended from the inner surface 41a which is a smooth surface on the lid 40.
The fitting protrusion 42 has a substantially wedge shape in cross section.
The lid 40 has a simple structure in which the top plate portion 41 is provided with the fitting protrusion 42 and can be easily formed and made thin.
The mouth 23 at the upper end of the side wall 22 of the body 20 has a groove-like fitting recess 30 with the inner annular wall 32 as the inner standing piece and the outer annular wall 33 as the outer standing piece. The connecting portion 31 is formed as a concave bottom.
At the upper end of the inner annular wall 32, an annular contact face 35 extending inward along the lid inner side surface 41 a is provided in a circumferential shape along the mouth 23.
Further, the fitting protrusion 42 of the lid 40 is provided with a locking protrusion 43 on the outer periphery, and the engaging recess 30 of the body 20 has a locking groove 34 as a V groove on the inner peripheral side of the outer annular wall 33. Provided.
In the state where the lid 40 shown in FIG. 1A is fitted to the body 20, the fitting protrusion 42 is in close contact with the fitting recess 30 to seal between the lid 40 and the body 20.
The contact surface body 35 includes a smooth contact surface 35a, and the contact surface 35a is continuously adhered to the inner surface 41a of the lid in the circumferential direction to form a seal line between the body 20 and the lid 40.
The contact surface 35a of the contact surface body 35 is in close contact with the inner surface 41a of the lid in a pressed state to form a seal line.
This effectively prevents the food juice stored in the storage unit 24 from leaking.
In this fitted state, the lid 40 and the body 20 cannot be removed because the locking projection 43 and the locking groove 34 are engaged.

The outer annular wall 33 has a locking groove (V groove) 34 portion as a thin tear groove portion, and a strip portion 36 that can be cut off is provided on the lid 40 side.
When the locking groove 34 is torn and the strip portion 36 is removed, the locking protrusion 43 is disengaged from the locking groove.
When the purchaser pulls the knob 36a shown in FIG. 3, cuts the locking groove portion along the mouth portion 23 of the body 20, and tears and removes the strip portion 36 from the body 20, as shown in FIG. Thus, the engagement of the locking projection 43 with respect to the locking groove 34 is released, and the lid 40 can be removed from the body 20 as shown in FIG.
Thus, in order to open the lid, it is necessary to peel off the strip portion, and the strip portion serves as an opening confirmation means that can determine whether the lid is opened or not by checking its state. .
FIG. 4 shows another embodiment of the fitting portion, and shows a case where the width of the fitting protrusion 42a of the lid 40a and the groove width of the fitting recess 30a of the body 20a are straightened.
In the present invention, since the close contact surface 35a is formed on the body side, the sealing performance can be secured to some extent even if the fitting protrusion is not wedge-shaped.
FIG. 5 shows a case where an annular step portion 44 is formed on the inner surface 41b of the lid so as to be in close contact with the annular close contact face 35. FIG.
Thus, in order to obtain the adhesion between the annular contact surface body 35 and the lid inner surface 41b, an annular contact surface serving as a receiving surface may be formed on the lid 40b side at the stepped portion 44.
Further, FIG. 6 shows that the height h1 from the locking projection 43 of the lid 40c to the lid inner surface 41a is set to the locking groove 34 in order to further strengthen the pressing contact force of the annular contact surface body 35 to the lid inner surface 41a. The case where it sets shorter than the height h2 to the contact | adherence surface 35a of the cyclic | annular contact | adherence surface body 35 is shown.
That is, when the engagement protrusion 43 and the engagement groove 34 are engaged, the dimension of the portion between the engagement groove 34 and the close contact surface 35a and the inner annular wall portion 32a and the annular close contact face 35 thickness is combined. It is made larger than the dimension of the part from the latching protrusion 43 of the fitting protrusion 42b to the lid inner surface 41a.
When the lid 40c is made of a hard resin and the body 20c is made of a soft resin, the inner annular wall portion 32a and the annular close contact face 35 contract to absorb the difference.
And since the contact surface 35a is press-contacted to the lid inner surface 41a by the repulsive force, the sealing performance can be further enhanced.

The expanded schematic diagram of the cross section of the fitting recessed part vicinity of the watertight resin container which concerns on this invention is shown. The external view of the watertight resin container which partly cut off is shown. The external view of a watertight resin container is shown. The other Example of the fitting part of a watertight resin container is shown. The other Example of the fitting part of a watertight resin container is shown. The other Example of the fitting part of a watertight resin container is shown. An external view of a watertight resin container having a circular planar shape is shown. An explanatory view in the state where a strip part was removed is shown.

Explanation of symbols

10, 10a Watertight resin container 20, 20a, 20b, 20c Body 21 Bottom 22 Body side wall 23 Entrance 24 Storage part 30, 30a Fitting recess 31 Annular wall connecting part 32, 32a Inner annular wall 33, 33a Outside Annular wall 34 Locking groove (V groove)
35 Annular adhesion surface 35a Adhesion surface 36 of the adhesion surface body Tear strip part 36a Tear strip part knobs 40, 40a, 40b, 40c Lid 41 Lid top plate part 41a, 41b Lid inner surface
42, 42a, 42b Fitting projection 43 Locking projection 44 Annular step

Claims (1)

  In a watertight resin container comprising a body and a lid, a circumferential groove-like fitting recess is formed at the mouth portion of the body by an inner annular wall portion and an outer annular wall portion, and a V groove portion is formed inside the outer annular wall portion. In addition, an annular contact face body extending in the inner circumferential direction from the upper end of the inner annular wall portion is formed, and a circumferential fitting projection is formed on the lid and a locking projection is formed outside the fitting projection. When the body is covered, the fitting projection and the locking projection of the lid are fitted and engaged with the fitting recess and the V-groove, respectively, and the annular close contact face formed on the body is covered with the lid. A watertight resin container characterized in that it is tightly sealed to the inner surface of the container.

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