JP3090442B2 - Storage container and lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container having an opening, such as a steel pail, a resin pail, a steel drum, a paint can, a milk can, and a lid.

[0002]

2. Description of the Related Art A storage container 3 such as a pail can having an opening at an upper portion and sealing the opening with a lid across a ring packing.
6, as shown in FIG. 6, a curved lid fixing edge 3 is formed in which the opening edge of the container main body 5 is rolled out and formed to protrude, and the lid 30 is curved so as to cover the lid fixing edge 3. An edge overlapping portion 32 formed with a recess and having a ring packing 31 attached inside is provided, and is fastened and fixed by lid fastening means 11 comprising a fastening band.

[0003]

The above-mentioned prior art has the following disadvantages. 1. The ring packing is easily deformed. When the internal pressure in the closed storage container increases due to temperature rise, the ring packing escapes in the opposite direction of the internal pressure (pushed out), and the whole is deformed. The phenomenon occurs. Then, the state of close contact between the ring packing and the lid fixing edge is weakened, and a gap is formed, which tends to cause a decrease in airtightness. Conversely, when the internal pressure in the storage container becomes negative due to a decrease in temperature or the like, the ring packing is pulled inward by the suction force and deformed. Then, the state of close contact between the ring packing and the lid fixing edge is weakened, and a gap is formed, so that the airtightness is easily reduced. Further, the lid is also easily deformed due to a change in internal pressure, and a gap is easily formed by the deformation of the lid. 2. When a large load is applied to the ring packing by, for example, placing the containers in the filled state of the contents, the ring packing reaches the compression elastic limit, and the original shape recovery force is significantly weakened even when the load is released. For this reason, it does not return completely from the contracted state, a gap is formed between the ring packing and the lid fixing edge, the tightening by the lid tightening and fixing means is not effective, and the situation that the lid turns even occurs, and the content of the contents occurs. Had the problem of spills. 3. High-quality and large-capacity expensive packing had to be used for containers with contents that emphasize airtightness.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to prevent the deformation and flow of the packing due to the pressure in the storage container,
An object of the present invention is to provide a storage container and a lid which do not cause a reduction in the airtightness of the packing even after an excessive load is applied.

[0005]

Means for Solving the Problems <Invention of Storage Container> A container body mainly provided with an opening formed at an upper portion, and a lid fixing edge formed to have an appropriate width outside the opening. A ring packing having an elastic restoring force, which is in close contact with the entire periphery of the upper portion of the lid fixing edge, a lid main body, and the lid fixing edge and the ring packing formed at a portion overlapping the lid fixing edge of the lid main body. An edge overlapping portion that sandwiches and sandwiches, a part of the edge overlapping portion facing an appropriate portion inside the lid fixing portion, and a protruding portion formed by projecting toward the lid fixing portion. A lid for closing the opening, the edge overlapping portion of the lid, and the lid fixing edge of the container body are pressed down to contract and adhere the ring packing,
A fastening band for fastening the edge overlapping portion and the lid fixing edge portion in a sealed state and a lid fastening means such as a number of protrusions provided outside the edge overlapping portion. . There are various ring packing materials such as rubber, vinyl chloride, and polyethylene. <Invention of Lid> A lid for closing an opening of a container such as a pail can or a drum can having an opening and a lid fixing edge formed to protrude with an appropriate width outside the opening, and a lid body. And an edge overlapping portion formed at a portion overlapping the lid fixing edge of the container of the lid body and overlapping the lid fixing edge with the ring packing therebetween, and a portion overlapping the lid fixing edge of the edge overlapping portion. And a projecting portion formed by projecting a part of the edge overlapping portion facing an appropriate portion inside the lid fixing portion toward the lid fixing portion.

[0006]

Embodiments of the present invention will be described with reference to the drawings. <Embodiment 1> FIG. 1 is an exploded perspective view of a storage container according to Embodiment 1 of the present invention and an enlarged sectional view showing a configuration of an edge overlapping portion of a lid, and FIG. It is a cut-away enlarged sectional view showing a sealed part in a state where a lid and a container main body are fastened and fixed by a band. Storage container 1 such as a pail can
A container main body 5 comprising an opening 2 having a fully opened upper part, a lid fixing edge 3 which is wound around the outside of the opening 2 to have an appropriate width and is formed in a curved projection; A ring packing 6 having elastic restoring force, which is in close contact with the entire periphery of the upper part, a lid main body 7, and a lid fixing edge 3 and a ring packing 6 formed at a portion overlapping the lid fixing edge 3 of the lid main body 7. An edge overlapping portion 8 which overlaps with a projection portion 9 which is formed by projecting a part of the edge overlapping portion facing an appropriate part inside the lid fixing portion toward the lid fixing portion. A lid 10 for closing the portion 2 and a portion between the edge overlapping portion 8 of the lid 10 and the lid fixing edge 3 of the container body 5 are pressed.
The ring packing 6 is shrunk and adhered, and includes an edge overlapping portion 8 and a lid fastening / fixing means 11 including a fastening band for sealing and fixing the lid fixing edge 3 in a sealed state.
When the cover 10 is tightened by the fastening means 11, the protruding portion 9 of the cover 10 strongly presses a part of the ring packing 6 (like a bite), and a part of the packing 6 is in a high pressure tight state (a state close to the limit of compression elasticity). Is formed), and a constricted portion 12 that is difficult to deform is formed. Thereby, even if the pressure in the container changes or a high load is applied, the packing does not deform, and a high-quality storage container that ensures a good sealed state is realized.

The results of a performance test comparison of the storage container 1 will be described. (Airtight test) Test conditions Cover the steel pail can with a lid and tighten the steel lid fastening band to make the container tightly closed. The packing used is made of vinyl chloride ("PV-9" manufactured by Nippon Chemical Co., Ltd.).
0 ”). With the storage container turned upside down and the lid and the fastening band fixed submerged, inject air from the air inlet provided in the container body to increase the internal pressure, and observe the state of air leakage while watching the pressure gauge I do. The value of the pressure gauge at the moment when bubbles start to be generated is read, and this is evaluated as airtightness. Results of comparison with airtightness test (pressure value kPa at which air leakage started to occur) Conventional product Storage container 1 First 8 31 Second 9 30 Third 9 32 From the above experimental results, storage container 1 is 3 compared to the conventional storage container. It exhibits excellent airtightness from 2 to 4 times. (Load test) Close the lid with the storage container full of water, and place the storage container in a two-tiered configuration, sandwich an iron plate between the storage containers, and place and hold several top plates on the upper storage container. hand,
A load of 150 kg is applied to the upper container and 196 kg is applied to the lower container.
Thereafter, the weight is removed every day, the storage container is turned over, and water leakage in the storage container is observed. Compared with the load test Load weight Conventional storage container Storage container 1 Upper stage 150 kg 1 day 12 days or more Lower stage 196 kg 1 day 11 days or more High durability, resilience, and high airtightness 11 times or more compared to conventional technology Has been realized.

<Embodiment 2> FIG. 3 is an enlarged cross-sectional view showing a sealed portion of a second embodiment of the present invention in a state where a lid and a container body are fastened and fixed with a lid fastening band. The storage container 15 uses the lid 18 having a double projection as the configuration of the lid 10 of the storage container 1, with the edge overlap portion 8 of the configuration of the lid 10 as the edge overlap portion 17 to which the protrusion 16 is added to the outside. It becomes. Since there are two protrusions,
In addition to realizing higher-performance airtightness, since the load is dispersed and received by the two protrusions, a storage container that can withstand a larger load and is resistant to changes in external pressure is realized. The same effect can be obtained even if the projecting portion is provided on the lid fixing edge side, and thus, such a configuration may be employed.

<Embodiment 3> FIG. 4 is an exploded perspective view of a storage container and an enlarged sectional view showing a configuration of an edge overlapping portion of a lid according to Embodiment 3 of the present invention, and FIG. of,
FIG. 4 is an enlarged cross-sectional view showing a sealed portion in a state where the lid and the container body are fastened and fixed by the lid fastening / fixing means. The storage container 20 is provided with the lid fastening and fixing means 11 of the configuration of the storage container 1.
, Except that the lid 10 is replaced by the lid 23, and the lid 21 is the lid 1
In addition to the configuration of No. 0, there is provided a lid fastening and fixing means 22 composed of a projection piece 21 which is bent so as to hang down a large number outside the edge overlapping portion 8 and tightens the lid fixing edge. In order to increase the density of the packing portion, a method of increasing the thickness of the portion of the packing to be increased in density may be used.

[0010]

Since the present invention has the above-described structure, the following effects can be obtained. When the cover is fastened by the cover fastening means, the protrusion of the cover bites into a part of the ring packing, and a part of the packing that is hardly deformed in a high pressure tight state (sometimes close to the limit of compression elasticity) is formed. As a result, even if the pressure in the storage container increases or decreases, the influence of the constricted portion on the packing body (a portion occupying most of the packing) is prevented. That is, a high-quality storage container and a lid in which the airtightness does not decrease even when the pressure in the storage container changes are realized. In addition, even when an excessive load is applied, the protrusion and the lid fixing edge are close to each other, and the packing reaches the compression elastic limit, so that the edge overlapping portion does not further shrink the packing body. It is. That is, even after excessive release of the load, the packing main body, which occupies most of the packing, is restored and maintains an airtight state, so that a high-quality storage container and a lid with no gap can be realized. In addition, since most parts of the packing are not contracted until they cannot be restored, a storage container and a lid that does not cause the so-called ineffective state of tightening, in which the tightening and fixing means rotates, are realized. Further, since the protruding portion provides a rib effect, the strength of the lid is increased, and a lid that is not easily deformed is realized. That is, the lid itself realizes a configuration in which it is difficult to create a gap. Further, it is not necessary to use a specially expensive high-quality packing, thereby realizing a low-cost, high-quality and highly-reliable storage container and lid.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a storage container according to a first embodiment of the present invention, and an enlarged cross-sectional view illustrating a configuration of an edge overlapping portion of a lid.

FIG. 2 is an enlarged cross-sectional view showing a sealed portion in a state where the lid and the container body are fastened and fixed by the lid fastening band according to the first embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view showing a sealed portion in a state where a lid and a container body are fastened and fixed by a lid fastening band according to a second embodiment of the present invention.

FIG. 4 is an exploded perspective view of a storage container according to a third embodiment of the present invention and an enlarged cross-sectional view illustrating a configuration of an edge overlapping portion of a lid.

FIG. 5 is an enlarged cross-sectional view showing a sealed portion in a state where a lid and a container body are fastened and fixed by a lid fastening band according to a third embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view showing a sealed portion in a state where a lid and a container body are fastened and fixed by a lid fastening band according to the related art.

[Explanation of symbols]

 1 ··· Storage container 2 ···· Opening 3 ····· Lid fixing edge 4 ····· Handle 5 ····· Container body 7 ····· Lid body 8 Edge overlapping part 9 Projecting part Lid 11 Fixing means for fastening lid 12 Narrowing part 15 Storage container 16 Projecting part 17 Edge overlapping part 18 Cover 20 Storage container 21 Projecting piece 22 Lid fastening means Reference numeral 30 Lid 31 Ring packing 32 Edge overlapping part 33 Storage container

Continuation of the front page (56) References JP-A-4-253639 (JP, A) JP-A-60-58344 (JP, A) JP-A-10-273155 (JP, A) Registered utility model 3033979 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65D 35/44-35/54 B65D 39/00-55/16

Claims (2)

(57) [Claims] 1. A rigid container main body having an opening formed mainly at an upper part, a lid fixing edge projected to an appropriate width outside the opening, and an entire upper part of the lid fixing edge. A ring packing having an elastic restoring force in close contact with the periphery, a lid main body, an edge overlapping portion formed on a portion of the lid main body overlapping with the lid fixing edge, overlapping the lid fixing edge and the ring packing, A part of the edge overlapping portion facing an appropriate portion more inside the lid fixing edge portion,
A protruding portion projecting toward the lid fixing edge to form a high-pressure tight state in a part of the ring packing; and a hard lid for closing the opening, and the edge overlapping portion of the lid. A clamping band or the edge overlapping portion for pressing down on the lid fixing edge of the container main body to shrink and adhere the ring packing, thereby sealing and fixing the edge overlapping portion and the lid fixing edge to each other. A lid holding and fixing means such as a large number of projecting pieces hanging down from the outside, and a hard storage container configured as described above. 2. A hard lid for closing the opening of a container such as a pail can or a drum, which has an opening and a lid fixing edge formed so as to protrude with an appropriate width outside the opening.
A lid body, an edge overlapping portion formed at a portion overlapping the lid fixing edge portion of the container of the lid body, overlapping the lid fixing edge portion and the ring packing, and an inner portion of the lid fixing portion as appropriate. A part of the edge overlapping part facing the main part, protruding toward the lid fixing edge part to form a high-pressure tight state in a part of the ring packing, and a hard part configured as described above . lid.