JP2014069837A - Discharge container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge container capable preventing deformation of an air valve due to heat produced when the container body is filled with high-temperature contents.SOLUTION: A discharge container comprises a container body 2 having an inner container 11 and an outer container 12 and a discharge cap 4 having a discharge port 21A. In the outer container 12, a suction hole 15B sucking outside air into between the outer container 12 and the inner container 11 is formed. In the discharge cap 4, there are provided an outside air introduction hole 25A communicating between the outside and the suction hole 15B and a communication hole 22A communicating between the discharge port 21A and the inside of the inner container 11. The discharge container is also provided with an air valve 37 switching between communication and blockage between the suction hole 15B and the outside air introduction hole 25A and a discharge valve 36 opening and closing the communication hole 22A. In the air valve 37, a slit 46 is formed in a closing film 45 closing the outside air introduction hole 25A and being capable of undergoing an elastic deformation, and an elastic deformation of the closing film 45 due to a reduction of the inner pressure of the space between the outer container 12 and the inner container 11 expands the slit 46 to communicate between the suction hole 15B and the outside air introduction hole 25A.

Description

  The present invention relates to a discharge container.

  As this type of discharge container, for example, as shown in Patent Document 1 below, an inner container and an inner container that contain the contents and squeeze deform as the contents decrease, and an elastically deformable outer container are provided. Some include a container body provided with a container, and a discharge cap that is attached to a mouth portion of the container body and has a discharge port that discharges contents.

In such a discharge container, the outer container is formed with an intake hole through which the outside air is sucked between the outer container, and the discharge cap is provided with an outside air introduction hole and a discharge port that communicate the outside with the intake hole. A communication hole that communicates with the inside of the inner container is formed, and an air valve that switches communication between the intake hole and the outside air introduction hole and a discharge valve that opens and closes the communication hole are provided.
The air valve has an annular plate shape, and has a valve body whose outer peripheral edge portion is a fixed end portion and whose opening edge portion is a free end portion that can be elastically deformed in the vertical direction. Is elastically deformed downward as the internal pressure of the space between the outer container and the inner container decreases and is separated from the valve seat, thereby communicating the intake hole and the outside air introduction hole. In addition, the thickness of the valve body is thicker than the fixed end portion at the free end portion. For this reason, the valve body is heavier at the free end portion.

JP 2011-230843 A

  However, in the above-described conventional discharge container, the air valve may be deformed due to, for example, the free end portion depending on its own weight due to the heat of the high-temperature contents filled in the container body. Therefore, for example, the intake hole and the outside air introduction hole communicate unexpectedly, and the air valve may not function normally.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a discharge container capable of suppressing deformation of an air valve due to heat when a high-temperature content is filled in a container body.

  The present invention employs the following means in order to solve the above problems. That is, the discharge container of the present invention is a container main body including a flexible inner container that accommodates contents and squeezes and deforms as the contents decrease, and an outer container in which the contents are installed. And a discharge cap attached to the mouth of the container body and formed with a discharge port for discharging the contents, and the outer container has an intake air into which the outside air is sucked between the inner container and the outer container. A hole is formed, and the discharge cap is formed with an outside air introduction hole that communicates the outside and the intake hole, and a communication hole that communicates the discharge port and the inside of the inner container. And an air valve that switches between communication and blocking of the external air introduction hole, and a discharge valve that opens and closes the communication hole, and the air valve slits into an elastically deformable blocking membrane that closes the external air introduction hole Formed with the outer container and the front By the closing film is elastically deformed with a reduction in the internal pressure of the space between the inner container, wherein the slit and the outside air introduction hole and the intake holes are expanded and wherein the communicating.

  In this invention, the air valve is configured by forming a slit in the blocking membrane, and switching between communication and blocking between the intake hole and the outside air introduction hole is performed by opening and closing the slit. Compared with the structure which has, the deformation | transformation of the air valve by the heat | fever of the filled content is suppressed. For this reason, even if the container body is filled with high-temperature contents, the switching performance of the communication between the intake hole and the outside air introduction hole by the air valve and the shut-off is difficult to deteriorate, and the function of the air valve is different for each discharge container. It is possible to suppress the variation. In addition, since the above-described switching is performed by opening and closing the slit, the switching performance of the air valve is different between the air valve and other members compared to the cantilevered support structure that switches communication and blocking by approaching and separating from the valve seat. A discharge container that is less affected by the positional relationship and exhibits stable switching performance can be formed at low cost.

Further, in the discharge container of the present invention, the blocking film is formed to be curved so as to be convex toward the side opposite to the outside air introduction hole, and the slit is formed at the convex tip. May be.
In this invention, since the obstruction film is curved so as to be convex toward the opposite side to the outside air introduction hole, the obstruction film is easily deformed in the direction from the outside air introduction hole side to the intake hole side. On the other hand, it is possible to make it difficult to deform in the opposite direction.
That is, when the internal pressure of the space between the outer container and the inner container decreases, air outside the container body acts on the obstruction membrane through the outside air introduction hole, and the obstruction membrane is elastically deformed to widen the slit. On the other hand, when the internal pressure of the space between the outer container and the inner container increases, the slit forming surfaces of the occlusive film are brought into contact with each other, and the occlusive film is elastically deformed. It is difficult to prevent the slit from expanding. Thereby, the switching performance of the communication between the intake hole by the air valve and the outside air introduction hole and the cutoff is improved.

  According to the discharge container according to the present invention, since the air valve is not configured to have a valve body that is cantilevered but formed by forming a slit in the blocking film, deformation of the blocking film due to heating is suppressed, Even when high temperature contents are filled, the switching performance of the air valve is hardly lowered, the function of the air valve is stabilized, and individual differences in the switching performance of the air valve can be reduced. Moreover, since the switching performance of the air valve is less affected by the positional relationship with other members, the air valve can exhibit stable switching performance.

It is an axial sectional view showing a discharge container in one embodiment of the present invention. It is a perspective view which shows the discharge valve of FIG.

  Hereinafter, an embodiment of a discharge container according to the present invention will be described with reference to the drawings. In each drawing used in the following description, the scale is appropriately changed to make each member a recognizable size.

As shown in FIG. 1, the discharge container 1 according to the present embodiment is mounted on a bottomed cylindrical container main body 2 in which contents are accommodated and a mouth portion 3 of the container main body 2 to discharge the contents. The cylindrical discharge cap 4 in which 21A was formed, and the top-like cylindrical overcap 5 detachably disposed on the discharge cap 4 are provided.
Here, the container main body 2, the discharge cap 4 and the overcap 5 are disposed in a state where their respective central axes are located on a common axis. Hereinafter, this common axis is referred to as a container axis O, and in FIG. 1, the overcap 5 side along the container axis O is the upper side, and the opposite side is the lower side. In addition, a direction orthogonal to the container axis O is a radial direction, and a direction around the container axis O is a circumferential direction.

  The container body 2 includes a flexible inner container 11 that is deformed by deformation as the contents are reduced, and a bottomed cylindrical outer container 12 in which the inner container 11 is housed and elastically deformed. The inner container 11 is a so-called Delami bottle in which the inner container 11 is detachably laminated on the inner surface of the outer container 12. The container body 2 is formed, for example, by blow-molding a co-extruded two-layer parison, the outer container 12 is formed of, for example, polyethylene resin, and the inner container 11 forms the outer container 12. For example, it is made of a polyamide-based synthetic resin that is not compatible with the polyethylene resin.

The mouth part 3 of the container body 2 includes an upper cylinder part 13 positioned on the upper side, a lower cylinder part 14 positioned on the lower side of the upper cylinder part 13 and having an inner diameter and an outer diameter larger than the upper cylinder part 13. Are formed in a two-stage cylinder shape.
A male screw portion 15 </ b> A is formed on the outer peripheral surface of a portion (hereinafter, referred to as an outer upper tube portion) 15 formed of the outer container 12 in the upper tube portion 13. Further, an intake hole 15 </ b> B for sucking outside air is formed between the outer container 12 and the inner container 11 in a portion where the male screw part 15 </ b> A is located in the outer upper cylinder part 15. Further, a vent groove 15C extending in the vertical direction is formed in a portion of the male screw portion 15A located above the intake hole 15B.

  The inner peripheral surface of the outer upper cylindrical portion 15 is a cylindrical surface, and on this inner peripheral surface, a portion (hereinafter referred to as an inner upper cylindrical portion) 16 of the upper cylindrical portion 13 constituted by the inner container 11 is formed. Are stacked. Further, the upper end portion of the inner upper cylindrical portion 16 is folded outward in the radial direction and disposed on the upper end opening edge of the outer upper cylindrical portion 15.

The discharge cap 4 is attached to the mouth portion 3 and has a top cylindrical discharge cap body 21 in which a discharge port 21A is formed, and is disposed inside the discharge cap body 21 to close the mouth portion 3, and A communication member 22 having a communication hole 22 </ b> A for communicating the discharge port 21 </ b> A with the inside of the inner container 11, and a valve member 23 disposed between the discharge cap body 21 and the communication member 22 are provided.
The discharge cap body 21 includes an annular plate-shaped top wall portion 25 having an opening at the center, a cylindrical peripheral wall portion 26 continuously provided downward from the outer peripheral edge of the top wall portion 25, A cylindrical discharge tube portion 27 projecting upward from the opening edge of the wall portion 25.

The ceiling wall 25 is formed with an outside air introduction hole 25A that allows the inside of the discharge cap body 21 to communicate with the outside. A cylindrical projecting cylindrical portion 28 projects downward from the opening edge of the top wall portion 25 in the radial direction.
A female screw portion 26 </ b> A that is screwed to the male screw portion 15 </ b> A of the mouth portion 3 is formed on the inner peripheral surface of the peripheral wall portion 26. Further, in the lower end portion of the peripheral wall portion 26, the lower cylinder portion 14 of the mouth portion 3 is fitted in an airtight state. Thus, the intake hole 15B is prevented from communicating with the outside of the container body 2 from the lower side of the peripheral wall portion 26.
The upper part of the discharge cylinder part 27 is curved outward in the radial direction so that the inner diameter and the outer diameter gradually increase toward the upper side. And the upper end opening of the discharge cylinder part 27 is made into the discharge outlet 21A.

The communication member 22 includes a bottom wall portion 31 that closes the mouth portion 3 from the upper side, a cylindrical outer cylinder portion 32 that protrudes upward from the outer peripheral edge of the bottom wall portion 31, and the outer cylinder portion 32. A cylindrical inner tube portion 33 projecting upward from the bottom wall portion 31 radially inward.
The bottom wall portion 31 has an annular shape in which a communication hole 22 </ b> A that communicates the inside and the outside of the container body 2 is formed at the center. Further, the outer peripheral edge portion of the bottom wall portion 31 has a double cylindrical shape protruding downward, and is fitted inside the upper cylindrical portion 13 of the container body 2.

The inner cylinder portion 33 is disposed so as to surround the communication hole 22A from the outside in the radial direction.
The outer cylinder portion 32 is fitted inside the peripheral wall portion 26 of the discharge cap body 21. An outer air circulation hole 32 </ b> A that penetrates in the radial direction and opens downward is provided at a lower end portion (a boundary portion between the outer cylinder portion 32 and the bottom wall portion 31) of the outer cylinder portion 32 in the circumferential direction. Are formed.

As shown in FIGS. 1 and 2, the valve member 23 includes a cylindrical communication tube portion 35 extending in the vertical direction, a discharge valve 36 provided at the lower end portion of the communication tube portion 35, and a communication tube portion 35. And an annular air valve 37 provided on the outside in the radial direction. The valve member 23 is formed of an elastic material such as silicon rubber, nitrile rubber, butyl rubber, elastomer, or urethane. Examples of the elastomer include thermoplastic elastomers such as olefin, styrene, and polyester. In addition, the valve member 23 may be another elastic material as long as it has heat resistance with respect to the temperature (for example, a little over 90 degreeC) with which the contents are filled.
As shown in FIG. 1, the communication cylinder part 35 is fitted inside the inner cylinder part 33, and the protruding cylinder part 28 is fitted inside. Further, the lower end portion of the communication tube portion 35 is in contact with the bottom wall portion 31, and the upper end portion of the communication tube portion 35 is in contact with the top wall portion 25. Thereby, the inner side of the lower end part of the communication cylinder part 35 and the inner side of the protruding cylinder part 28 constitute a communication path 38 that allows communication between the discharge port 21A and the communication hole 22A.

As shown in FIGS. 1 and 2, the discharge valve 36 includes a disc-like valve body 41 that covers the communication hole 22 </ b> A, and a connection portion 42 that connects the valve body 41 and the communication cylinder portion 35.
The outer peripheral edge of the valve body 41 is in contact with the outer peripheral edge of the communication hole 22A over the entire circumference.
The connection part 42 has connected the outer periphery of the valve body 41, and the lower end of the communicating cylinder part 35, and is formed in multiple numbers (three in this embodiment) at intervals in the circumferential direction. In addition, the connection part 42 should just be formed 1 or more not only in three. And the connection part 42 is formed so that elastic deformation is possible according to the internal pressure fluctuation | variation of the inner container 11, the pressure by the discharged content, etc., and the valve body 41 can move upwards by elastic deformation of the connection part 42. It has become. And 22 A of communicating holes are open | released by the movement of the valve body 41. FIG.

The air valve 37 closes the outside air introduction hole 25 </ b> A of the ceiling wall portion 25 from below, and is configured by a slit 46 formed in an elastically deformable blocking film 45. The blocking film 45 is formed to be curved so as to have a convex shape protruding downward on the opposite side to the outside air introduction hole 25A. This convex shape is formed over the entire circumference, and a plurality of slits 46 (three in the present embodiment) are formed at the distal end of the convex shape at intervals in the circumferential direction.
The air valve 37 has the suction hole 15B and the outside air introduction hole 25A when the blocking film 45 is elastically deformed and the slit 46 is expanded as the internal pressure of the space between the outer container 12 and the inner container 11 decreases. To communicate with. Note that the number of slits 46 is not limited to three but may be one or more.
Further, the outer peripheral edge portion of the air valve 37 is sandwiched between the top wall portion 25 and the upper end of the outer cylinder portion 32.

  As shown in FIG. 1, the overcap 5 includes a conical top wall portion 51 that bulges upward, and a cylindrical side wall portion that extends downward from the outer peripheral edge of the top wall portion 51. 52. A part in the circumferential direction at the lower end portion of the side wall portion 52 is connected to the peripheral wall portion 26 via a hinge portion 53. As a result, the overcap 5 rotates about the hinge portion 53 to open and close the discharge port 21A. In addition, a cylindrical plug tube portion 54 that fits inside the discharge tube portion 27 protrudes downward from the center portion of the top wall portion 51.

Next, a method for discharging contents using the discharge container 1 having the above configuration will be described.
First, for example, the outer container 12 of the container body 2 is squeezed (elastically deformed) in a state where the overcap 5 is opened and the discharge posture is such that the discharge port 21A faces downward. Thereby, the inner container 11 is deformed together with the outer container 12, and the volume is reduced. Then, the internal pressure of the inner container 11 becomes a positive pressure along with the volume reduction deformation, and the positive pressure causes the connecting portion 42 to be elastically deformed, and the valve body 41 is separated upward from the communication hole 22A. Open. Thereby, the contents stored in the inner container 11 are discharged from the discharge port 21 </ b> A through the communication path 38.

  Thereafter, when the internal pressure of the inner container 11 decreases, the connecting portion 42 is restored and deformed, the valve body 41 moves downward to close the communication hole 22A, and the inner container 11 is sealed. Further, when the squeeze deformation is released, the outer container 12 tends to be restored and deformed. On the other hand, since the inner container 11 is sealed by closing the communication hole 22A, the inner container 11 is not restored and deformed. Therefore, a negative pressure is generated between the outer container 12 and the inner container 11, and this negative pressure acts on the air valve 37 through the intake hole 15B.

When the negative pressure acts on the air valve 37, the closing film 45 forming the air valve 37 is elastically deformed downward and opens the slit 46. Thereby, the intake hole 15B communicates with the outside, and the outside air is sucked between the outer container 12 and the inner container 11 from the intake hole 15B through the outside air introduction hole 25A, the outside air circulation hole 32A, and the ventilation groove portion 15C.
At this time, since the blocking film 45 is curved so as to have a convex shape toward the lower side opposite to the outside air introduction hole 25A, a negative pressure is generated between the outer container 12 and the inner container 11. When this occurs, the air outside the container body 2 acts on the closing membrane 45 via the outside air introduction hole 25A, the closing membrane 45 is elastically deformed and the slit 46 is easily expanded, and the intake hole 15B and the outside are connected. Communicate.

  When the internal pressure between the outer container 12 and the inner container 11 rises to atmospheric pressure due to the intake of the outside air, the blocking film 45 is restored and the slit 46 is closed. Thereby, the communication between the intake hole 15B and the outside is blocked. As described above, when the outside air is sucked between the outer container 12 and the inner container 11, the volume reduction shape of the inner container 11 is maintained.

If the outer container 12 of the container body 2 is squeezed again from this state, the air valve 37 is in a shut-off state, so the internal pressure between the outer container 12 and the inner container 11 becomes positive, and this positive pressure As a result, the volume of the inner container 11 is reduced. By reducing the volume of the inner container 11, the contents are discharged in the same manner as described above.
At this time, since the blocking film 45 is curved so as to have a convex shape toward the lower side opposite to the outside air introduction hole 25A, the blocking film 45 is formed by the internal pressure between the outer container 12 and the inner container 11. The formation surfaces of the slit 46 in 45 are abutted with each other. Thereby, the obstruction | occlusion film | membrane 45 becomes difficult to elastically deform, and it is suppressed that the slit 46 expands.
Thus, even if the outer container 12 that has been squeezed and deformed is restored and deformed, the inner container 11 is reduced in volume as the contents are reduced, and the outside air is prevented from flowing into the inner container 11. Thereby, the deterioration of the contents is prevented and the storage stability is improved.
The contents are discharged as described above.

  When filling the contents in such a discharge container 1, the temperature of the contents may be over 90 ° C., for example. When high temperature contents are filled in the inner container 11 of the container body 2, the air valve 37 is heated by the heat of the contents. And the obstruction | occlusion film | membrane 45 which forms the air valve 37 becomes soft with a heat | fever. However, the air valve 37 is not a cantilever-supported valve body, but a slit 46 is formed in the closing film 45, and the shape of the peripheral edge of the slit 46 in the closing film 45 is not easily deformed by heating. The shape of the valve 37 is maintained.

According to the discharge container 1 configured as described above, since the air valve 37 has a structure in which the slit 46 is formed in the closing film 45, the air valve 37 can be connected and disconnected even when high temperature contents are filled. Switching performance is unlikely to deteriorate. Thereby, while being able to stabilize the function of the air valve 37, the individual difference of the switching performance of the air valve 37 can be made small. Moreover, compared with a cantilever support structure, it becomes difficult to be influenced by the relative position of the air valve 37 with respect to other members other than the air valve 37, and stable switching performance can be exhibited.
Furthermore, since the blocking film 45 is curved so as to have a downward convex shape, the slit 46 can be easily expanded when the internal pressure between the outer container 12 and the inner container 11 is negative. The slit 46 can be prevented from expanding when the internal pressure becomes positive. Thereby, the switching performance of the communication between the intake hole 15B and the outside air introduction hole 25A by the air valve 37 and the cutoff is improved.

In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, the slit shape of the occlusive membrane is linear, but is not limited thereto, and may be other shapes such as a cross shape.
The occlusion film has a convex shape downward along the entire circumference. However, the shape is not limited to this, and the convex shape is downwardly convex along the entire circumference. It does not have to be. Moreover, the obstruction | occlusion film | membrane does not need to be made into convex shape toward the downward direction, may be convex shape toward the upper direction, and may be made into a flat shape instead of convex shape.
Although the air valve and the discharge valve are integrally formed as valve members, the air valve and the discharge valve may be formed separately.
The discharge valve is not limited to a configuration in which the valve body moves up and down as in the case of a three-point valve having a valve body and three connecting portions, and is formed in a film like the air valve. Other configurations such as a configuration in which communication and blocking are switched by expanding the slit, such as a slit, may be used.
The discharge cap main body may be divided into a mounting portion for mounting the discharge cap main body on the mouth portion and a main body portion having a discharge port.
The discharge cap body is screwed into the mouth part of the container body, but the mouth part is formed by forming a fitting protrusion on each of the mouth part of the container body and the discharge cap body and fitting them undercut. It may be attached to.
The overcap is a hinge-type cap connected to the cap body by a hinge part, but is not limited to this, for example, a screw-type cap that is detachably screwed to the discharge cap or a detachable attachment to the discharge cap by pushing operation Other structures, such as a stoppered cap, may be used. Further, the overcap may not be provided.
The container body is not limited to a delami bottle in which the inner container is detachably laminated with respect to the inner surface of the outer container, but may be a double container in which the inner container and the outer container are formed separately.

  According to this invention, industrial applicability is recognized regarding the discharge container which can suppress the deformation | transformation of the air valve by the heat | fever when a high temperature content is filled in the container main body.

DESCRIPTION OF SYMBOLS 1 Discharge container, 2 Container main body, 3 port part, 4 Discharge cap, 15B Intake hole, 21A Discharge port, 22A Communication hole, 25A Outside air introduction hole, 36 Discharge valve, 37 Air valve, 45 Closure membrane, 46 Slit

Claims (2)

A container main body including a flexible inner container that accommodates contents and squeezes and deforms as the contents decrease, and an outer container in which the contents are installed;
A discharge cap mounted on the mouth portion of the container body and formed with a discharge port for discharging the contents;
The outer container is formed with an intake hole through which the outside air is sucked between the inner container,
The discharge cap includes
An outside air introduction hole that communicates the outside with the intake hole, and a communication hole that communicates the discharge port and the inside of the inner container are formed,
An air valve for switching communication and blocking between the intake hole and the outside air introduction hole;
A discharge valve for opening and closing the communication hole,
The air valve is formed with a slit in an elastically deformable blocking membrane that blocks the outside air introduction hole,
As the internal pressure of the space between the outer container and the inner container is reduced, the blocking membrane is elastically deformed so that the slit is expanded and the intake hole communicates with the outside air introduction hole. Discharge container characterized. The blocking membrane is formed to be curved so as to be convex toward the opposite side to the outside air introduction hole,
The discharge container according to claim 1, wherein the slit is formed at a convex tip.

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