JP2002002755A - Back flow preventing container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a back flow preventing container having a simple structure, certainly preventing the penetration of air into a container main body and capable of keeping the quality of content. SOLUTION: The back flow preventing container has a container main body 12, which is formed from a resin or the like having elasticity, has an extrusion port 14 formed to one end thereof and has a tubular shape or the like, and an inner plug 18 provided so as to close the extrusion port 14. The inner plug 18 has an inner plug projection 24 provided to the center thereof to protrude to the outside of the extrusion port 14 and the through-hole 26 allowing the inside and outside of the container main body to communicate with each other. A nozzle member 32 formed from a flexible resin or rubber having elasticity and coming into close contact with the peripheral edge part of the extrusion port 14 and the side surface of the inner plug projection 24 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow backflow prevention container which stores liquid foods, cosmetics, and other fluid materials, and which can prevent the inflow of air after pushing out the contents.

[0002]

2. Description of the Related Art Conventionally, there has been a tube-type container for accommodating seasonings such as kneaded wasabi and creamy cosmetics. In such a container, the side surface of the container body is pushed to increase the pressure of the contents, and the contents are extruded from the extrusion port of the container body. However, after dispensing the contents, the container body is pushed and the force that restores the deformation that has occurred works, and the inside of the container becomes negative pressure,
Air was flowing from the extrusion port. When the contents come into contact with the air accumulated in such a container body, the contents may be oxidized or spoiled by bacteria in the air.
In particular, in recent years, products without preservatives have been increasing, and there has been a demand for a tube-type container that is liable to cause spoilage and deterioration and does not allow air to enter.

As a container for preventing the inflow of air, for example, there has been a backflow prevention tube disclosed in Japanese Utility Model Laid-Open No. 57-143147. In this backflow prevention tube, a ceiling wall for closing the extrusion port is provided at the extrusion port of the container body, and a plurality of through holes are formed in the ceiling wall. A conical nozzle having a small hole formed at the tip was attached to the tip of the extrusion port, and a valve seat parallel to the ceiling wall was provided inside the nozzle. The valve seat is provided so as to be movable in a direction perpendicular to the ceiling wall,
When the valve seat is in contact with the ceiling wall, the through hole is closed by the valve seat, and when the valve seat is away from the ceiling wall,
The contents could flow out of the through-hole through the outflow groove.

[0004] The method of using this backflow prevention tube is such that when the side surface of the container body is pushed, the pressure of the contents is increased and the valve seat is pushed up from the ceiling wall, the through holes in the ceiling wall are released, and the contents are discharged from the nozzle through the outflow groove. Flows out. When the pressing of the side surface of the container main body is stopped after the contents are taken out, a force for restoring the deformation of the container main body works and the container main body side becomes a negative pressure. Then
The valve seat is pulled back to the ceiling wall side to close the through hole in the ceiling wall and prevent air from flowing into the container body.

[0005] In addition, there is a tube disclosed in Japanese Utility Model Publication No. 58-21399 as a container for preventing inflow of air. This tube was provided with a lid member having a through hole formed in the center at the same time as closing the extrusion port at the extrusion port of the container body. The extrusion port further includes a cylinder portion having a through hole communicating with the inside of the container body, and a piston provided inside the cylinder portion, and the piston is biased by a spring toward the outside of the container body. I was Further, a conical projection protruding toward the outside of the container body is formed on the piston, and fitted into the through hole of the lid member to close the through hole.

[0006] In the method of using this tube, when the side surface of the container body is pressed, the pressure of the contents increases, and the contents flow out of the through-holes of the cylinder portion into the cylinder portion and fill between the lid member and the cylinder. Then, the piston is pushed down to the back of the cylinder by the pressure of the filled contents, and the projection of the piston is pulled out from the through hole of the lid member. This opens the outlet and pushes out the contents. After removing the contents, when the pressure on the side of the container body is stopped, the pressure of the contents filled between the lid member and the cylinder decreases, and the piston moves outward from the cylinder by the urging force of the spring. It moves and closes the through hole of the lid member. This prevents air from flowing into the container body.

[0007]

Problems to be Solved by the Invention
In the case of the backflow prevention tube disclosed in Japanese Patent No. 43147, the contents remain outside the valve seat and inside the nozzle, and the contents always come into contact with the air entering from the nozzle, and there is a risk of spoilage or deterioration. . In addition, the above-mentioned
In the case of the tube disclosed in JP-A-21399,
The structure was complicated and the cost was high. Further, there is a possibility that contents or the like may enter between the cylinder portion and the piston, which may cause a malfunction or a malfunction.

The present invention has been made in view of the above-mentioned conventional problems, and provides a backflow prevention container which has a simple structure, can reliably prevent air from entering the container body, and can maintain the quality of the contents. The purpose is to do.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a tubular container body formed of resin or the like and having elasticity and having an extrusion port formed at one end thereof, and an inner plug provided so as to cover the extrusion port. And an inner plug projection provided at the center of the inner plug and protruding to the outside of the extrusion port, a through-hole provided in the inner plug and communicating the inside and outside of the container body, and formed of a soft resin or rubber. This is a backflow prevention container provided with a nozzle member that has elasticity and has a peripheral portion of the extrusion port and a nozzle member that is in close contact with a side surface of the inner plug projection.

The inner plug member is provided with a cylindrical mounting portion fitted to the extrusion port of the container body, and a locking groove on the side peripheral surface of the mounting portion for mounting the nozzle member. The nozzle member is formed with a locked portion such as a locking projection fitted into the locking groove or the like. In addition, the side peripheral surface of the nozzle member is formed such that a bent portion having a V-shaped, U-shaped, W-shaped, or other cross-section is formed on the outer peripheral side of the inner plug projection toward the inside of the container body. It is provided. The spout of the nozzle member is a backflow prevention container provided at the center of a bent portion that is recessed from the peripheral portion of the nozzle toward the inside of the container body.

In the backflow prevention container of the present invention, when the side surface of the container body is pressed, the pressure of the contents of the container body increases, the contents flow out from the through hole of the inner plug projection, and fill the space between the inner plug and the nozzle member. . Then, the nozzle member elastically deforms outward due to the pressure of the filled contents, and a gap is formed between the inner plug projection and the nozzle member. The contents flow out of the gap and are pushed out from the through-hole of the nozzle member. After taking out the contents,
When the pressing of the container body is stopped, a force is applied to the container body to restore the deformation caused by the pressing, and the content side becomes a negative pressure. Then, the deformation of the nozzle member is restored, and the nozzle member comes into close contact with the inner plug projection again, thereby preventing the inflow of air.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a backflow prevention container 10 of a first embodiment of the present invention. The backflow prevention container 10 of this embodiment has a container body 12 made of a synthetic resin having an appropriate elasticity. At one end of the container body 12, a cylindrical extrusion port 14 is integrally formed.
A male screw 16 is formed on the side surface of the.

An inner plug 18 made of a somewhat hard synthetic resin is fitted and attached to the peripheral edge 14a of the extrusion opening 14. The inner plug 18 is provided with a cylindrical mounting portion 20 fitted inside the extrusion opening 14, and the upper end surface 22 of the mounting portion 20 closes the mounting portion 20 and protrudes outwardly in a conical shape. 2
4 are provided. At the base end of the inner plug projection 24 adjacent to the upper end surface 22, four through holes 26 are formed at equal intervals along the base end circumference to communicate the inside and the outside of the inner plug 18. ing. A locking groove 28 for locking a nozzle member 32 to be described later is provided on the peripheral surface of the inner port 18 on the side of the mounting portion 20 in the vicinity of the peripheral edge 14a of the extrusion opening 14 of the container body 12.
The locking groove 28 is formed around the mounting portion 20 in parallel with the peripheral edge portion 14 a of the extrusion opening 14. A projecting wall 30 projecting upward is formed around the periphery of the upper end surface 22.

A nozzle member 32 made of an elastic material such as a flexible resin or rubber is attached to a portion of the inner plug 18 projecting outward from the extrusion opening 14 of the container body 12. The nozzle member 32 includes a cover portion 3 formed in a conical shape.
4 is provided, and a part of the inner peripheral surface of the cover portion 34 is
8 and is in close contact with the side surface of the inner plug projection 24. A spout 36 which is a through hole is provided at the tip of the cover 34.

On the inner side of the peripheral edge of the nozzle member 32 on the side of the extrusion opening 14, a locking projection 3 fitted into the locking groove 28 of the inner plug 18 is provided.
8 project inwardly. And cover part 3
In the middle of 4, a thin portion 40 is provided to facilitate elastic deformation.
Are formed.

Next, a method of using the backflow prevention container 10 of this embodiment will be described. The container body 12 accommodates seasonings such as kneaded wasabi and creamy cosmetics, and the container body 1
The inner plug 18 and the nozzle member 32 are attached to the second extrusion port 14, and an outer lid (not shown) covering these is screwed to the male screw 16 and attached.

When the contents are to be taken out, the side surface of the container body 12 is pressed. As a result, the pressure of the contents of the container body 12 increases, the contents flow out of the through holes 26 of the inner plug 18, and the inner plug 18 and the cover portion 34 of the nozzle member 32.
Contents are filled in the space surrounded by. Then, due to the pressure of the filled contents, as shown in FIG.
The vicinity of the thin portion 40 is elastically deformed, and the cover portion 34 is expanded outward. Then, a gap is formed between the cover portion 34 and the inner plug projection 24, and the content flows out from the gap and is pushed out from the spout 36 of the nozzle member 32.

After removing an arbitrary amount of the contents from the backflow prevention container 10, when the pressing of the container main body 12 is stopped, a force is applied to the container main body 12 to restore the deformation caused by the pressing. Inside becomes negative pressure. Then, the deformation of the nozzle member 32 is restored, and the nozzle member 32 is brought into close contact with the inner plug projection again.
Prevent backflow of contents once exposed to outside air.

The backflow prevention container 10 of this embodiment has a simple structure and is excellent in productivity. In addition, after the contents are taken out, the air is sucked into the container body 12 or the contents once contacted with the outside air are removed. There is no backflow. Thereby, the quality can be kept constant without the contents being deteriorated or spoiled by contact with the air. Further, the amount of the preservative added to the contents can be reduced.
Further, since the nozzle member 32 is made of a flexible elastic body, it can maintain high airtightness, can reliably stop air from entering and backflow of the contents, and have a low viscosity of the contents. No leakage in the case of liquid. When the container side surface 12 is pressed, the contents are easily elastically deformed by the pressure of the contents, and the contents can be pushed out easily with a small force. The cover part 34 of the nozzle member 32 and the inner plug projection 2 of the inner plug 18
4 is in close contact with the vicinity of the spout 36 of the nozzle member 32, so that the contents staying inside the cover portion 34 do not come into contact with air and do not deteriorate.

When the contents become low, if the air is to be put into the container body 12 and stored in an inflated state upside down, and the contents are to be collected at the extrusion port 14 of the container body 12, the nozzle member 32 is used. By pinching or pulling up the cover portion 34 and elastically deforming it to form a gap between the inner plug 18 and the inner plug projection 24, air can flow backward.

Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.
The backflow prevention container 42 of this embodiment includes a portion of the inner plug 18 that protrudes outward from the extrusion port 14 of the container body 12,
Nozzle member 44 made of the same flexible elastic material as above
Is attached. The nozzle member 44 is provided with a cover portion 34 formed in a conical shape, and a part of the inner peripheral surface of the cover portion 34 is in close contact with the side surface of the inner plug projection 24 of the inner plug 18. The container main body 1 is disposed on a portion of the side peripheral surface of the cover portion 34 closer to the container main body 12 than a portion in contact with the inner plug 18.
A bent portion 48 having a V-shaped cross section is provided around the two sides. The bent portion 48 is formed thin so as to be easily elastically deformed.

The method of using the backflow prevention container 42 of this embodiment is the same as that of the above-described embodiment. When the contents are taken out, the side surface of the container body 12 is pressed, and the pressure of the contents of the container body 12 is thereby reduced. And the content flows out from the through-hole 26 of the inner plug 18, and the content is filled in the space surrounded by the inner plug 18 and the cover 34 of the nozzle member 44. And
Due to the pressure of the filled contents, the curvature of the curved thin portion 48 of the nozzle member 44 is extended as shown in FIG.
Moves away from the inner plug projection 24 of the inner plug 18. Then, a gap is formed between the cover portion 34 and the inner plug projection 24, and the content flows out from the gap and is pushed out from the spout 36 of the nozzle member 44.

According to the backflow prevention container 42 of this embodiment, the same effects as those of the above embodiment can be obtained.
And the bent part 48 is formed in the nozzle member 44, and the opening area at the time of pushing out a content can be made large,
High viscosity contents can be easily poured out.

Next, a third embodiment of the present invention will be described with reference to FIG.
It will be described based on. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The backflow prevention container 50 of this embodiment has the inner plug formed integrally with the container main body 12, and projects on the peripheral edge portion 14 a of the extrusion port 14 of the container main body 12 in parallel with the protruding direction of the extrusion port 14. A cylindrical small diameter portion 52 is formed. A locking groove 54 is formed on the peripheral side surface of the small-diameter portion 52 so as to make a round, and an inner plug projection 58 that closes the small-diameter portion 52 and protrudes conically outward is provided on the upper end surface 56 of the small-diameter portion 52. ing. At the base end of the inner plug projection 58 adjacent to the upper end surface 56, four through-holes 60 are formed at regular intervals along the base end circumference to communicate the inside and outside of the container body 12. ing.

The nozzle member 32 made of a flexible elastic material is attached to the inner plug projection 58 of the small diameter portion 52.
The nozzle member 44 is provided with a cover part 34 formed in a conical shape, and a part of the inner peripheral surface of the cover part 34 is in close contact with the side surface of the protrusion 58. Extrusion port 14 of nozzle part 44
On the inner side of the peripheral portion on the side, a locking projection 38 to be fitted into the locking groove 54 of the small diameter portion 52 is formed so as to make one round inside.

The method of using the backflow prevention container 50 of this embodiment is the same as that of the above embodiment, and has the same effect. Further, since the container main body 12 and the inner plug projection 58 are provided integrally, the number of parts is small, the management is easy, and the assembling process can be simplified.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The inner plug 64 of the backflow prevention container 62 of this embodiment is provided with a cylindrical attachment portion 66 fitted inside the extrusion port 14, and the inner peripheral surface of the attachment portion 66 has a peripheral portion of the extrusion port 14. 14a
A partition plate 68 that separates the inside and outside of the mounting portion 66 is formed at a position slightly closer to the container body 12 than that. Partition plate 68
At the center of the container body, a triangular pyramid-shaped inner plug projection 70 protruding to the outside of the container body 12 is formed, and the tip of the inner plug projection 70 is positioned closer to the container body 12 than the upper end surface 72 of the mounting portion 66. I have. The partition plate 68 has four through holes 74 formed at equal intervals along the outer periphery of the inner plug projection 70, and communicates the inside and the outside of the inner plug 64. On the outer side surface of the inner plug 64, a locking projection 76 for locking a nozzle member 78 to be described later is formed near the periphery 14a of the extrusion opening 14 of the container body 12.

A nozzle member 78 made of a flexible elastic material is attached to a portion of the inner plug 64 projecting outward from the extrusion port 14 of the container body 12. Nozzle member 7
8 is provided with a cover portion 80 for connecting the upper end surface 72 of the mounting portion 66 of the inner plug 64 and the tip of the projection 70 of the inner plug 64, and the cover portion 80 is thin and has a dish-shaped shape.
At the center of the cover 80, a spout 82 is formed at a position facing the tip of the protrusion 70, and a cylindrical protrusion 84 is formed around the spout 82 so as to make a round contact with the side surface of the protrusion 70. . A side surface 86 that covers the mounting portion 66 of the inner plug 64 is provided at a peripheral portion of the cover portion 80, and a locking projection that is locked by the locking projection 76 of the inner plug 64 is provided inside the peripheral portion of the side surface 86. 8
8 project inwardly.

The method of using the backflow prevention container 62 of this embodiment is the same as that of the above-described embodiment. When the contents are taken out, the side surface of the container body 12 is pressed, and the pressure of the contents of the container body 12 is thereby reduced. And the content flows out of the through hole 74 of the inner plug 64, and the content is filled in the space surrounded by the inner plug 64 and the cover 80 of the nozzle member 78. And
As the pressure of the filled contents increases, the cover 80 bulges outward as shown in FIG. 7, and the cylindrical protrusion 84 of the cover 80 separates from the protrusion 70 of the inner plug 64. Then, a gap is formed between the cylindrical projection 84 of the cover portion 80 and the projection 70 of the inner plug 64, and the content flows out from this gap to form the nozzle member 7
8 from the spout 82.

According to the backflow prevention container 62 of this embodiment, the same effects as those of the above embodiment can be obtained.
Since the cover member 80 is provided to be recessed inside the side surface 86, the cover member 80 is not deformed by an external force, so that the contents do not inadvertently come out or air flows in the nozzle member 78. It is.

The backflow prevention container of the present invention is not limited to the above embodiments, and the shape of each part of the inner plug and the nozzle member may be freely selected as long as an appropriate gap is generated by the pressure of the contents. Can be changed to

[0032]

According to the backflow prevention container of the present invention, the nozzle member itself functions as a valve mechanism, the structure is simple, and the operation is reliable. Further, since the air is not sucked into the container main body after the contents are taken out, the contents can be maintained at a constant level without the contents being deteriorated or spoiled by contact with the air. Further, the mechanism is a mechanism for opening and closing the vicinity of the spout of the nozzle member, and the contents in the nozzle member are also sealed, so that it is hard to deteriorate. In addition, the open / closed state can be easily set according to the shape of the nozzle member and the like, and a wide range of contents from low to high viscosity can be handled. If you want to put air in the container,
By pinching the nozzle member, it is also possible to make air flow easily. And the nozzle member can be opened and closed reliably, and the preservative and the like added to the contents can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a backflow prevention container according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a state where the contents of the backflow prevention container of this embodiment are pushed out.

FIG. 3 is a longitudinal sectional view of a backflow prevention container according to a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a state where the contents of the backflow prevention container of this embodiment are pushed out.

FIG. 5 is a longitudinal sectional view of a backflow prevention container according to a third embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a backflow prevention container according to a fourth embodiment of the present invention.

FIG. 7 is a longitudinal sectional view showing a state where the contents of the backflow prevention container of this embodiment are pushed out.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Backflow prevention container 12 Container main body 14 Extrusion port 16 Male screw 18 Inner plug 20 Attachment part 24 Inner plug projection 26 Through hole 28 Locking groove 32 Nozzle member 34 Cover part 36 Outlet 38 Locking projection 40 Thin part

Claims (3)

[Claims] 1. A container body having an elasticity and having an extrusion port formed at one end thereof, an inner plug provided to cover the extrusion port, and an outer port provided at the center of the inner plug to the outside of the extrusion port. A protruding inner plug projection, a through hole provided in the inner plug communicating between the inside and the outside of the container main body, a nozzle member having elasticity and closely attached to a peripheral portion of the extrusion port and a side surface of the inner plug projection. And a backflow prevention container characterized by comprising: 2. The backflow prevention container according to claim 1, wherein a bent portion is provided on a side peripheral surface of the nozzle member so as to extend around the outer peripheral side of the inner plug projection. 3. The backflow prevention container according to claim 1, wherein the spout of the nozzle member is provided at the center of a bent portion that is recessed from the peripheral portion of the nozzle toward the inside of the container body.