JPH0644828Y2 - Airtight container - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an airtight container made of synthetic resin foam, in which a lid is attached to a container main body containing foods, vegetables, etc. while keeping the airtight state. .

[Conventional technology]

Conventionally, various foods such as vegetables, fish meat and fruits are stored in a foam synthetic resin container, for example, a foam polystyrene container, and a lid is attached to this container and sealed with gum tape etc. to maintain air tightness There are some used in. This is because, for example, when the lid is placed on the expanded polystyrene container, the airtightness of the container is not good, and in addition, the defect of the engagement between the container and the lid such that the lid detaches from the container during use is compensated. It is for. However, the tape application for sealing airtightness between the container and the lid by using the gum tape or the like takes a lot of time for tape cost and attachment, which is a great obstacle to the engagement between the lid and the container after packaging. Therefore, in order to solve such incomplete engagement between the container and the lid and insufficient airtightness, as shown in FIG. 6, the abutting portions of the container main body a and the lid B are fitted to each other. A container provided with a convex portion c and a concave portion d capable of maintaining the state has been proposed.

[Problems to be solved by the device]

However, in such a container in which the container body (a) and the lid body (b) are provided with a fitting structure composed of the convex portion (c) and the recess portion (d), the air in the recess portion (d) is fitted when the lid body (b) and the container body (a) are fitted. Compressed,
The back pressure may cause the lid b to separate from the container body a, and the lid b may be easily detached from the container body a due to vibration or the like, or due to movement of an object contained inside the container body a. Even in the case where the airtightness cannot be maintained, even in the case of this container, as in the case where the plate-shaped lid is simply placed on the upper surface of the box-shaped container body as described above, the both are adhered with the gum tape. Had to do.

Therefore, in view of the problems of the conventional container as described above, the present invention has an object to provide an airtight container that can maintain its airtightness and firmly attaches the lid to the container body. Is.

[Means for Solving the Problems]

In order to achieve the above object, an airtight container according to the present invention includes a container body made of foamed synthetic resin and a lid, and the entire circumference of one of the rim of the container body or one of the rims of the lid that abuts the rim or An engaging groove, which is open to each other's abutting surface and has an internal space width larger than the opening mouth width, and whose engaging space is composed of an engaging portion and an air reservoir, is provided. An engaging projection, which is composed of a neck portion and an engaging head portion having a diameter larger than the neck portion, and which can be tightly fitted in the engaging portion, is provided at a position corresponding to the engaging groove in the other of the container body or the lid. At the same time, the engaging head has a bulged portion that is compressed and deformed when fitted into the engaging portion and is accommodated in the air reservoir.

[Action]

As described above, the airtight container according to the present invention has the engaging portion and the air reservoir portion on the entire circumference or a part of the abutting portion of the container body and the lid, and the one from the opening mouth width. An engaging groove having a large internal width is provided, and on the other side, an engaging protrusion having a neck and an engaging protrusion having a diameter larger than that of the neck is fitted into the engaging portion of the engaging groove. As a result, the tight fitting relationship between the engaging groove and the engaging projection maintains the airtightness in the container, and the compressed air in the engaging groove generated at the time of engagement is released to the air reservoir. At the same time, the lid is prevented from being separated from the container body by the back pressure of the compressed air, and at the time of fitting, the engaging head closely fitted in the engaging portion of the engaging groove is compressed and deformed. The force that pushes the lid upwards is diminished by the portion bulging into the air reservoir, and the force that pulls the lid downward due to the continuous movement of the bulging portion is reduced. None, with or lifted lid from the container body from the container body, to prevent or off. Further, in this way, the fitting relationship between the engaging projection and the engaging portion of the engaging groove is set to a reliable close fitting state such that the engaging head in the engaging portion is compressed and deformed. Thus, the airtightness of the container can be more perfect.

〔Example〕

The details of the present invention will be explained based on further illustrated embodiments. FIG. 1 is an example of an airtight container according to the present invention,
In the figure, reference numeral 1 is the main body of the airtight container, and reference numeral 2
Is a lid that is fitted onto the container body 1. The container body 1 and the lid 2 are made of foamed synthetic resin, and suitable foamed synthetic resin materials such as polystyrene, polyethylene, polyurethane are adopted. Generally, the container body 1 has a box-like shape, and the lid body 2 has a structure that can be fitted into the container body 1. Further, the structure for providing the airtight relationship between the container body 1 and the lid body 2 has a structure in which the entire circumference or a part of the rim of the container body 1 or one of the rims of the lid body 2 that abuts on the rim are in contact with each other. The container main body is opened to the contact surface and has an inner space lateral width larger than the mouth width of the opening, and the space is provided with an engagement groove 5 composed of the engagement portion 3 and the air reservoir portion 4. 1 or the other of the lid body 2 at a position corresponding to the engaging groove 5, the neck portion 6 and an engaging head portion 7 having a diameter larger than the neck portion 6, and a tight fit in the engaging portion 3 of the engaging groove 5. The engaging projections 8 are formed so as to project. In the illustrated example, the engaging groove 5 opening upward is provided on the container body 1 side, and the engaging groove 5 is provided on the lid body 2 side.
The engaging protrusion 8 that can be fitted into Engagement groove 5 in the illustrated example
Is formed over the entire circumference of the mouth of the container body 1, and the engaging groove 5 is composed of an engaging portion 3 and an air reservoir portion 4, and if necessary, as shown by reference numeral 11 in the drawing, A compressed air escape groove is provided in the container when the lid is closed. Further, the engagement protrusion 8 is formed on the lower surface of the lid 2 by an engagement head portion 7 and a neck portion 6 having a diameter smaller than that of the engagement head portion 7, and the engagement protrusion portion 8 is formed in the engagement groove 5. The engagement protrusion 8 is tightly fitted to the engagement portion 3 by being fitted. At the time of this tight fitting, the compressed air in the engagement groove 5 is released to the air reservoir 4, and the engagement groove 5 is compressed by the reverse pressure of the compressed air.
Therefore, the engaging protrusion 8 is not pushed back. Further, the slit 9 provided below the air reservoir 4 facilitates fitting and withdrawing of the engaging projection 8 into and from the engaging groove 5, so that the container body 1 and the lid 2 can be hermetically and firmly attached. The container body 1 is not only capable of being maintained but also serves as an escape area for the compressed air together with the air reservoir portion 4 to prevent the compressed air from separating from the container body 1 and the lid body 2 and to form the engagement groove 5. Or lid 2
It is provided so that the engagement groove 5 portion can be easily expanded at the time of pulling out the mold in molding.

FIG. 2 is a cross-sectional view showing a preferable size relationship between the engagement groove 5 and the engagement projection portion 8, and the size relationship between the engagement groove 5 and the engagement projection portion 8 is as follows. By so doing, the engagement relationship between both members becomes strong, and the airtightness of the container becomes perfect.

That is, the relationships shown in FIG. 2 are: D ≧ d, B ≧ b, A ≧ a, C ₁ = C ₁ ′, C ≧ C ′, where A: diameter of the engaging head 7, B: engaging protrusion The size of the neck 6 of the portion 8, C: the distance between the lower surface of the lid 2 and the tip of the engaging head 7, C ₁ : the distance between the lower surface of the lid 2 and the center of the engaging head 7, D: of the base of the neck 6 Width, a: diameter of engaging portion 3, b: opening edge width of engaging groove 5, C ′: distance between upper edge of engaging groove 5 and tip of engaging portion 3, C ₁ ′: engaging groove 5, the distance between the upper edge of the engaging portion 3 and the center of the engaging portion 3, d: the upper edge width of the opening of the engaging groove 5, and in this relationship, after both members are fitted, the state as shown in FIG. 3 is obtained. At the same time, the fitting state shown by the following relational expression is established.

That is, the relationship shown in FIG. 3 is: e ≧ e ₁ , C> k, C ′ ≦ c, y ≦ y ₁ , A ≧ h, where e: between the lower surface of the lid 2 and the shoulder of the engaging head 7. , E ₁ : distance between the upper edge of the engaging groove 5 and the shoulder of the engaging portion 3, k: distance between the lower surface of the lid 2 and the tip of the engagingly deformed engaging head 7, c: from the lower surface of the lid 2. Distance to the compression-deformed portion of the engaging head 7, y: Distance between the upper edge of the engaging groove 5 and the lower end of the air reservoir 4, y ₁ : Fitting the upper edge of the engaging groove 5 and the engaging head 7 Is the distance between the lower ends of the air reservoirs 4 after, and h: the diameter of the engaging head 7 after being fitted into the engaging portion 3. As a result, the engaging protrusion 8 is inserted into the engaging portion 3 of the engaging groove 5.
Will be tightly fitted, and the airtightness of the container will be perfect. Further, the bulging portion 7'of the engaging head portion 7 due to the compressive deformation after fitting is displaced into the air reservoir portion 4 and is received, so that the engaging head portion 7, that is, the lid body 2 can be attracted to the container body 1. None Makes the lid strong. Further, the volume of the engagement protrusion 8 and the volume of the engagement groove 5 have a relationship in which the former is equal to or smaller than the latter. By doing so, it goes without saying that the object of the present invention can be achieved even if the relationship between the engaging groove 5 and the engaging projection 8 is set as follows, as shown in FIG.

That is, the relationship shown in FIG. 4 is e ≧ e ₁ and B ≧ b.

It should be noted that FIG. 5 shows that when the container body 1 and the lid body 2 of the airtight container are molded, the mold release is facilitated when the engaging groove 5 and the engaging protrusion 8 are formed as described above. To do the container body 1
The lid 2 is provided with an undercut portion 10.

[Effect of device]

As described above, the airtight container according to the present invention uses the foam synthetic resin container body and the lid body, and the engaging groove is formed on the entire circumference or a part of one of the mouth edge and the lid periphery of the container body that abuts. And an engaging protrusion is provided on the other side, and both are fitted and locked while maintaining an airtight state by fitting each other, and an air reservoir is provided in the engaging groove. , Compressed air generated inside the engaging groove when the engaging protrusion is press-fitted into the engaging groove can be released to the air reservoir, and the lid body is lifted up from the container body by the back pressure of the compressed air. Prevent from leaving. In addition, in the present invention, the engaging head portion of the engaging protrusion is compressed and deformed in the engaging portion of the engaging groove, and the bulging portion is displaced and received in the air reservoir portion. Be sure to prevent it from rising or coming off the container body. or,
In this way, the engagement relationship between the engagement protrusion and the engagement groove is such that the engagement head of the engagement protrusion is compressed and deformed in the engagement portion of the engagement groove and a part is displaced to the air reservoir. By making a tight fitting state like
The tightness of the container can be perfect. Further, in the case where the engaging groove is provided with a slit, it is possible to easily fit and withdraw the engaging protrusion into the engaging groove, and to maintain airtightness between the container main body and the lid and a firm mounting state. By reliably acting as an escape area for the compressed air together with the air reservoir, it is possible to reliably prevent the container body and the lid from being separated from each other by the compressed air, and at the time of molding the container body or the lid that forms the engagement groove. It is easy to expand the engaging groove portion when the mold is pulled out.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a partial cross-sectional explanatory view showing an embodiment thereof, and FIG. 2 is a cross-sectional explanatory view showing an embodiment of an engaging groove and an engaging protrusion. FIG. 3 is a sectional explanatory view showing a fitting state of the engaging groove and the engaging protrusion of FIG. 2, FIG. 4 is a sectional explanatory view showing a modified example of the embodiment of FIG. 2, and FIG. FIG. 6 is an enlarged sectional view of an essential part showing a fitting structure in a conventional airtight container, in which another embodiment of the container main body and the lid is considered in consideration of time. 1: Container body, 2: Lid, 3: Engagement part, 4: Air reservoir part, 5: Engagement groove, 6: Neck part, 7: Engagement head part, 8: Engagement projection part, 9: Slit, 10: Undercut part, 11: Compressed air escape groove.

Claims (2)

[Scope of utility model registration request] 1. A container body made of a foamed synthetic resin and a lid body, which are opened to the mutual contact surfaces at all or part of one of the rim of the container body and one of the rims of the lid body that abuts the rim. The internal space width is larger than the opening edge width, and the engaging space is provided with an engaging groove formed of an engaging portion and an air reservoir,
An engaging projection that is formed at a position corresponding to the engaging groove on the other of the container body or the lid and that includes a neck portion and an engaging head portion having a diameter larger than the neck portion and can be tightly fitted in the engaging portion of the engaging groove. The airtight container in which the bulging portion which is compressed and deformed when the engaging head is fitted to the engaging portion is housed in the air reservoir portion. 2. The airtight container according to claim 1, wherein a slit is provided in the lengthwise direction of the air reservoir.