JP6679216B2 - Discharge container and its discharge cap - Google Patents

Description

  The present invention relates to a discharge container and its discharge cap. More specifically, the present invention relates to an improvement in the structure of a discharge container having a laminated separation structure and a discharge cap thereof.

  As a discharge container adapted to pour out a content liquid such as a seasoning (hereinafter, collectively referred to as “contents” in the present specification) by mainly pressing the container, a content in which the content is conventionally stored A laminated peeling container (also referred to as a delamination container) having a container (inner layer) and an outer container (outer layer) in which the inner container is stacked is used. In a general laminated peeling container, the inner container is formed of a flexible material that is dented and deformed as the content decreases, and the outer container is formed of an elastically deformable material and the discharged content is The amount of outside air corresponding to the above is sucked through the outside air introduction hole and introduced between the inside air container and the inside container (for example, refer to Patent Documents 1 and 2).

Japanese Patent No. 4024396 Japanese Patent No. 3688373

  However, in the conventional laminated peeling container (derami container), when the outside air is inhaled after the contents are discharged, noise may occur. This noise is a sound that is unintentionally generated at the time of inspiration, and may be regarded as an abnormal sound rather than a pleasant sound.

  Therefore, it is an object of the present invention to provide a discharge container having a layered peeling structure and a discharge cap for the same, which reduces abnormal noise when inhaling outside air.

  In order to solve such a problem, the present inventor first examines the mechanism of abnormal noise generated at the time of intake, and pays attention to the relationship between the vibration of the check valve and the air pressure in the air passage when inhaling the outside air. Came to. As a result of further study on this point, it was found that when the pressure inside the air flow path fluctuates, the check valve vibrates, and this vibration causes the air to be sparse and dense, resulting in abnormal noise (sounding). Came to the view.

  Based on such a view, the present inventor has conducted a study while paying attention to the fact that the check valve itself is vibrating, and as a result, it is considered that sounding is generated only when the check valve vibrates. I arrived. In addition, as a result of repeated experiments and analyses, it was concluded that the vibration behavior during the experiment and the vibration behavior during the analysis were in agreement. In light of these ideas, when we examined the mechanism of noise generation, it was speculated that the vibration of the check valve might be the cause of air sparseness, which is the cause of noise.

  That is, when the check valve vibrates, a compressional wave equivalent to the frequency of the check valve is generated in the air flowing through the air flow path. At this time, the frequency of the check valve and abnormal noise (noise) are generated. The sound frequency sometimes coincides with the frequency of the sound, and it was speculated that this may lead to the generation of abnormal noise (sound). As a result of further experimentation and analysis based on this assumption, the present inventor has found that the mode amplitude of the check valve (the amplitude in the vibration mode of the check valve when the check valve vibrates due to intake of outside air). Therefore, it has been found that reducing the pressure fluctuation (see FIG. 17) reduces air pressure fluctuations and suppresses the generation of abnormal noise.

The present invention has been made based on such findings,
A flexible inner container that accommodates the contents and is deformed by being deflated as the contents are reduced, and the inner container is internally provided, and is for elastically deforming to inhale outside air between the contents and the inner container. A container body having an outer container in which an intake hole is formed,
A discharge port for discharging the contents is formed in the top surface portion, and a discharge cap attached to the mouth portion of the container body,
An outside air introduction hole that communicates the outside with the intake hole,
A valve seat provided in the vicinity of the flow path of the outside air introduced from the outside air introduction hole,
It has a lip portion that sits on the valve seat, and when the outside air is sucked in between the outer container and the inner container, the flexible lip portion is separated from the valve seat so that the outside air introduction hole and the intake hole communicate with each other. And a check valve for switching between a state in which the lip portion is brought into contact with the valve seat and a state in which the outside air introduction hole and the intake hole are blocked,
A discharge container comprising:
A plurality of outside air introduction holes are arranged at positions where vibrations of the check valve at the time of sucking outside air are canceled out.

  In this discharge container, the outside air introduced from the outside air introduction hole at the time of sucking the outside air acts to cancel the vibration of the check valve. Therefore, the vibration (mode amplitude) of the check valve due to the intake of the outside air can be reduced. According to this, the fluctuation of the air pressure is reduced, and the generation of abnormal noise is suppressed.

  It is preferable that the plurality of outside air introduction holes in such a discharge container are arranged at positions that are in the opposite phase of the vibration of the check valve at the time of sucking outside air.

  The plurality of outside air introduction holes may be arranged at intervals corresponding to half the wavelength when the check valve vibrates.

  Further, the plurality of outside air introduction holes may be arranged at intervals corresponding to an odd multiple of half the wavelength when the check valve vibrates.

  In addition, the check valve may be an annular valve, and the plurality of outside air introduction holes may be arranged line-symmetrically with a center line that intersects the center axis of the check valve as an axis of symmetry.

  The plurality of outside air introduction holes may have the same hole area.

  Further, the plurality of outside air introduction holes may have the same shape.

Further, the discharge cap for the discharge container according to the present invention,
A flexible inner container that accommodates the contents and is deformed by being deflated as the contents are reduced, and the inner container is internally provided, and is for elastically deforming to inhale outside air between the contents and the inner container. A discharge cap attached to the mouth of a container body having an outer container having an intake hole,
An outside air introduction hole that communicates the outside with the intake hole,
A valve seat provided in the vicinity of the flow path of the outside air introduced from the outside air introduction hole,
It has a lip portion that sits on the valve seat, and when the outside air is sucked in between the outer container and the inner container, the flexible lip portion is separated from the valve seat so that the outside air introduction hole and the intake hole communicate with each other. And a check valve for switching between a state in which the lip portion is brought into contact with the valve seat and a state in which the outside air introduction hole and the intake hole are blocked,
Is equipped with
A plurality of outside air introduction holes are arranged at positions where vibrations of the check valve at the time of sucking outside air are canceled out.

  According to the present invention, it is possible to reduce abnormal noise when inhaling outside air.

It is a fragmentary sectional view which shows the whole discharge container. It is a longitudinal cross-sectional view explaining the action at the time of discharging the contents in the discharge container. It is a longitudinal cross-sectional view explaining the action when the discharge container is restored after discharging the contents. It is a perspective view of the discharge cap in the state covered with the overcap. It is a perspective view of the discharge cap in the state where the overcap was opened. It is a side view of the discharge cap in the state where the overcap is opened. It is a top view of the discharge cap in the state where the overcap was opened. It is a longitudinal cross-sectional view showing a part of a discharge cap covered with an overcap. It is a figure which expands and shows a part of FIG. It is a fragmentary sectional view which shows the whole discharge container. It is a longitudinal cross-sectional view which shows the principal part of a discharge container. It is a longitudinal cross-sectional view which shows the principal part of a discharge container. It is a longitudinal cross-sectional view showing the bottom of the discharge container. It is a perspective view showing an example of section structure, such as a connecting body which constitutes a discharge container. FIG. 15 is a perspective view showing a state where the valve body portion shown in FIG. 14 is elastically displaced. It is a figure explaining the mechanism of sounding at the time of inhalation of outside air. It is a figure explaining the mode amplitude of a check valve at the time of inhalation of the open air. FIG. 3 is a diagram for explaining waves equally divided in the circumferential direction in an annular check valve, showing a check valve divided into two equal parts, four equal parts, six equal parts, eight equal parts, and ten equal parts in the circumferential direction. It is a top view shown. It is a graph which shows an example of the relationship between the frequency and amplitude of the wave in a check valve at the time of vibration. FIG. 6 is a plan view of a check valve for explaining a vibration model in which plus and minus are repeated every 60 ° in the circumferential direction. It is a side view of a check valve for explaining a vibration model in which plus and minus are repeated every 60 ° in the circumferential direction. It is a figure explaining the mode amplitude in the case of arranging two outside air introduction holes at the position of right and left 30 degrees, and the superposition. FIG. 23 is a diagram for explaining the superposition of the mode amplitudes described in FIG. 22, with reference to a check valve having a single outside air introduction hole. It is a figure explaining the mode amplitude in the case of arranging two outside air introduction holes in the position of 90 degrees on either side, and superposition. It is a figure explaining as a reference example the mode amplitude and the superposition in the case of arranging two outside air introduction holes in the position of 60 degrees on either side.

  Hereinafter, a discharge container according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the discharge container 10 has a flexible inner container 11 in which the content M is accommodated and is deformed and deformed as the content M is reduced, and the inner container 11 is internally installed and elastically deformed. A container body 13 provided with a possible outer container 12, a discharge cap 15 attached to a mouth portion 13a of the container body 13 and provided with a discharge port 14 for discharging the content M, and detachably arranged on the discharge cap 15. It also includes an overcap 16 and the like.

  Here, the container body 13 is formed in a cylindrical shape with a bottom, the overcap 16 is formed in a cylindrical shape with a top, and when the overcap 16 is attached to the discharge cap 15, the container body 13 and the overcap 16 are covered. Are arranged so that their respective central axes are located on the common axis (see FIG. 8 and the like). Hereinafter, this common axis is referred to as the container axis O, the overcap 16 side is referred to as the upper side along the direction of the container axis O, the bottom side of the container body 13 not shown is referred to as the lower side, and the direction orthogonal to the container axis O is the diameter. The direction is called the direction, and the direction that goes around the container axis O is called the circumferential direction.

  The overcap 16 may be connected to the ejection cap 15 by a hinge portion 16a (see FIG. 2 and the like). In order to prevent the overcap 16 from interfering with the discharge of the content M from the discharge port 14, the hinge portion 16a has a discharge port in a state where the discharge container 10 is inclined so that the discharge port 14 faces downward. It is arranged so that it is located higher than 14.

  The container body 13 is a so-called deramie bottle in which the inner container 11 is removably laminated on the inner surface of the outer container 12. The container body 13 is formed, for example, by blow molding a coextrusion-molded two-layer structure parison. The outer container 12 is made of, for example, polyethylene resin or polypropylene resin, and the inner container 11 is made of, for example, a polyamide-based synthetic resin or ethylene vinyl alcohol copolymer that is incompatible with the resin forming the outer container 12. It is made of polymer resin.

  The mouth portion 13a of the container body 13 is formed in a two-stage tubular shape including an upper tubular portion 17 located on the upper side and a lower tubular portion 18 located on the lower side and having a diameter larger than that of the upper tubular portion 17. (See FIG. 2 etc.). A male screw portion 29 is formed on the outer peripheral surface of a portion (hereinafter, referred to as an outer upper tubular portion) 17 a of the upper tubular portion 17 that is configured by the outer container 12. In addition, in the outer upper cylinder portion 17a, an intake hole 19 for sucking outside air is formed between the inner container 11 and a portion located below the male screw portion 29 (see FIG. 3 and the like). A communication groove 20 extending in the container axis O direction is formed in a portion of the male screw portion 29 located above the intake hole 19.

  The inner peripheral surface of the outer upper cylindrical portion 17a is a cylindrical surface, and the portion of the upper cylindrical portion 17 that is configured by the inner container 11 (hereinafter referred to as the inner upper cylindrical portion) 17b is laminated on the inner peripheral surface. (See Figure 2, etc.) The upper end portion of the inner upper tubular portion 17b may be folded back to the outside in the radial direction and disposed on the open end of the outer upper tubular portion 17a.

  The discharge cap 15 includes an inner plug member 21 that closes the mouth portion 13a of the container body 13, and a main body cylindrical member 23 that covers the inner plug member 21 and has the discharge port 14 formed therein. (See Figure 2, etc.) The inner plug member 21 includes a plug main body 47 whose outer peripheral edge portion is arranged on the open end of the mouth 13a of the container main body 13, and a communication cylinder portion 22 which is erected from the plug main body 47.

  The stopper main body 47 includes a bottomed cylindrical inner cylinder portion 24 arranged in the mouth portion 13 a of the container body 13 with a gap between the inner cylinder portion 24 and the upper end of the inner cylinder portion 24. A flange portion 25 projecting toward the outside of the container body 13 and arranged on the open end of the mouth portion 13a of the container body 13, and an outer cylindrical portion 26 extending upward from the outer peripheral edge of the flange portion 25, An inner tubular portion 24 extending downward from the flange portion 25 so as to surround the inner tubular portion 24 from the outside in the radial direction, and an intermediate tubular portion 27 liquid-tightly fitted in the mouth portion 13a of the container body 13. (See FIG. 2, etc.). The inner tubular portion 24, the flange portion 25, the outer tubular portion 26, and the intermediate tubular portion 27 are arranged coaxially with the container axis O. Further, an outer air circulation hole 28 is formed at a lower end portion of the outer tubular portion 26 so as to penetrate in the radial direction and open downward.

  The communication tubular portion 22 is disposed on the bottom wall portion of the inner tubular portion 24. In addition, a through hole 42 that is open to both the inside of the inner container 11 and the inside of the communication tubular portion 22 is provided through the bottom wall portion. The through-hole 42 is composed of, for example, a plurality of small holes that are evenly arranged around the container axis O (see FIG. 2 and the like).

  The main body tubular member 23 is formed in a topped tubular shape that is arranged coaxially with the container axis O. On the inner peripheral surface of the peripheral wall portion 23a of the main body tubular member 23, a female screw portion 30 screwed to the male screw portion 29 of the mouth portion 13a of the container body 13 is formed. Further, in the lower end portion of the peripheral wall portion 23a, which is located below the threaded portion where the female screw portion 30 is formed, the lower tubular portion 18 of the mouth portion 13a of the container body 13 is fitted in an airtight state, and The outer cylinder portion 26 of the inner plug member 21 is fitted in the upper end portion located above the portion.

  A discharge port 14 for discharging the content M is formed in the top surface portion 31 of the discharge cap 15 (see FIG. 5 and the like). In the discharge container 10 of the present embodiment, the discharge port 14 is formed so as to be coaxial with the container axis O (see FIG. 2 etc.), but may be formed at a position displaced from the container axis O. .

  Further, an outer air introducing projection 33 protruding upward is formed on the top surface portion 31 of the discharge cap 15, and an external air introducing hole 34 is formed in the outer air introducing projection 33 (see FIG. 2 and the like). In order to prevent the contents M from being sucked in from the outside air introducing hole 34, the outside air introducing protrusions 33 are provided in a state where the discharging container 10 is tilted in the discharging posture in order to discharge the contents M from the discharge port 14. It is formed at a position higher than the ejection port 14 (see FIG. 2 and the like).

  For example, in the present embodiment, the outside air introducing projection 33 is formed so as to stand upright between the discharge port 14 and the hinge portion 16a, and the outside air introducing hole 34 is located at a position higher than the top surface portion 31. It is arranged at a spatial distance from 31. Therefore, even if the content M dripping from the ejection port 14 adheres to the outer surface of the ejection cap 15, the dripping content M is unlikely to be sucked from the outside air introduction hole 34. Further, the outside air introduction hole 34 is opened upward when the discharge container 10 is tilted to a discharge posture in order to discharge the content M from the discharge port 14, and more preferably vertically above the outside air introduction projection 33. It is formed so as to open in the direction (see FIG. 2 and the like).

  Although the specific shape of the above-mentioned outside air introducing projection 33 is not particularly limited, for example, in the present embodiment, the length in the circumferential direction is longer than the thickness of the discharge cap 15 in the radial direction (direction perpendicular to the container axis O). , Is formed in a curved shape along an arc centered on the discharge port 14 (see FIG. 5). According to the outside air introducing projection 33 having such a shape, the contents M attached to the outer surface of the discharge cap 15 due to dripping or the like are prevented from approaching the outside air introducing hole 34 and sucked from the outside air introducing hole 34. Can be avoided. It is also preferable that such an outside air introducing projection 33 is curved along an arc centered on the discharge port 14.

  The discharge cap 15 is formed with an engagement portion 32 with which the overcap 16 in the covered state is engaged. For example, in the present embodiment, a step portion that slightly protrudes in the radial direction is formed around the top surface portion 31 of the discharge cap 15, and the step portion engages the overcap 16 in the covered state. A joining portion 32 is formed (see FIGS. 2 and 5 and the like).

  Moreover, the top surface portion 31 is preferably formed to be smooth. For example, in the discharge container 10 of the present embodiment, the top surface portion 31 has a smooth surface except for the portion where the discharge port 14 is formed and the portion where the outside air introducing projection 33 is formed. In this case, even if the contents M, such as dripping, adhere to the top surface portion 31 of the discharge cap 15, it can be wiped off with one wipe, and thus the wiping is easy.

  The top surface portion 31 is formed with a receiving cylinder portion 35 extending downward and having an outer diameter equal to the inner diameter of an outer fitting cylindrical portion 40 described later. Further, the top surface portion 31 is provided with a discharge cylinder 36 which has the discharge port 14 inside.

  An inner seal cylinder part (seal part) 37 extending downward from the overcap 16 is fitted in the discharge cylinder 36 (see FIGS. 1, 5, 8 and the like). Further, around the inner seal cylinder portion 37, an annular protrusion 38 is formed so as to protrude downward from the back surface of the overcap 16 (see FIG. 5 and the like).

  Further, the overcap 16 is formed with an outside air introduction hole seal portion 39 that closes the outside air introduction hole 34 when the overcap 16 is attached to the discharge cap 15 (see FIGS. 11 and 12). If the overcap 16 is attached to the discharge cap 15 when the discharge container 10 is not used or is transported, the outside air introducing hole seal portion 39 may inadvertently suck the contents M from the outside air introducing hole 34. Is avoided (see FIGS. 4 and 8).

  Here, between the inner plug member 21 and the main body tubular member 23, an external fitting tubular portion 40 externally fitted to the communication tubular portion 22 of the internal plug member 21 is disposed. The outer fitting cylinder 40 is arranged coaxially with the container axis O, and the lower end of the outer fitting cylinder 40 is fitted onto the communication cylinder 22 and inside the inner cylinder 24 of the inner plug member 21. The upper end portion of the fitted external fitting tubular portion 40 is externally fitted to the receiving tubular portion 35 of the main body tubular member 23.

  An annular check valve (air valve portion) 41 is formed at an intermediate portion of the outer fitting cylinder portion 40 in the container axis O direction so as to project radially outward (see FIGS. 2 and 3). ). The check valve 41 is elastically deformable, and is a valve for switching communication between the intake hole 19 and the outside air introduction hole 34 and switching of the cutoff thereof. The check valve 41 suppresses the inflow of outside air at the time of discharging the content M, and at the time of inhaling outside air. Only open to allow intake. A lip portion 41a that seats on the valve seat 31a is formed on the outer peripheral portion (indicated by reference numeral 41p) of the check valve 41 of the present embodiment that is annular (or circumferential, disc-shaped, collar-shaped, top hat-shaped). (See FIGS. 8 and 9). The valve seat 31 a is provided inside the main body tubular member 23 and at a position near the flow path of the outside air introduced from the outside air introduction hole 34. Further, the valve seat 31a is formed in an annular shape on a portion of the ceiling surface, which is the back side of the top surface portion 31, with which the lip portion 41a of the check valve 41 comes into contact. The lip portion 41a is formed in an annular shape similarly to the annular valve seat 31a (see FIG. 14, FIG. 15, etc.).

  Further, the inner plug member 21 is formed with a communication recess 43 that connects the discharge cylinder 36 and the inside of the inner container 11. The communication recess 43 is formed inside the communication tubular portion 22, and is arranged coaxially with the container axis O. As a result, the direction of the container axis O and the axial direction of the communication recess 43 coincide. In the illustrated example, the communication recess 43 is located below the discharge cylinder 36, that is, inside the inner container 11 along the container axis O direction. Further, the internal volume of the communication recess 43 is larger than the internal volume of the discharge cylinder 36.

  A valve body portion 44 that is slidably fitted in the communication cylinder portion 22 of the inner plug member 21 along the container axis O direction and slides along the container axis O direction to open and close the communication recess 43. Is provided. The valve body portion 44 is formed in a cylindrical shape with a bottom arranged coaxially with the container axis O, and further has an annular flange portion that projects radially outward from an upper end portion (upper end portion) in the container axis O direction. Is regulated to have a shape. With respect to the valve body portion 44, the annular upper end surface of the communication cylinder portion 22 functions as a valve seat (valve retainer) that contacts the flange portion and receives the valve body portion 44. At this time, the outer peripheral surface of the valve body portion 44 and the inner peripheral surface of the communication recess 43 may be less likely to come into contact with each other, or the bottom surface of the valve body portion 44 in the plug body 47 is located in the radial direction more than the communication cylinder portion 22. The structure may be such that it does not come into contact with the portion located inside.

  Further, the upper end of the valve body portion 44 abuts on the upper end surface of the communication cylinder portion 22 or is located above the upper end surface, and as shown in FIGS. Is connected to one end of a connecting piece 45 that connects the valve body portion 44 and the outer fitting cylinder portion 40. A plurality of connecting pieces 45, three in the illustrated example, are provided at intervals in the circumferential direction, and each connecting piece 45 extends in a curved manner along the circumferential direction. The positions of both ends of the connecting piece 45 in the container axis O direction are the same. The valve body portion 44, the external fitting cylinder portion 40, the connecting piece 45 and the check valve 41 are integrally molded to form a connecting body 48.

  The connecting piece 45 elastically deforms to allow the valve body portion 44 to be displaced along the container axis O (in the present specification, the connecting piece 45 elastically deforms in this manner and the valve body The displacement of the portion 44 is expressed as elastic displacement). When there are a plurality of connecting pieces 45 (three in the illustrated example) as in the present embodiment, it is preferable that the connecting pieces 45 are arranged at equal intervals in the circumferential direction. If the connecting pieces 45 are thus arranged at equal intervals, the valve body portion 44 when elastically displaced is prevented from being inclined (twisted state) with respect to the plane perpendicular to the container axis O. It is possible to assist the smooth displacement of the valve body portion 44 (see FIGS. 14 and 15).

  When the valve body portion 44 is elastically displaced, the connecting piece 45 is in a state of being inclined as a whole while being twisted (twisted) in part and elastically deformed (see FIG. 15). At this time, the connecting piece 45 itself is in a partially twisted state, and the entire connecting piece 45 is in an extended state according to the state, and the elastic restoring force of the connecting piece 45 causes the valve body portion 44 to move before displacement. It acts as a force to restore (displace) to the position. It should be noted that the valve body 44 may rotate in the circumferential direction (clockwise or counterclockwise) about the container axis O during elastic displacement or restoration displacement.

  Next, the operation of the discharge container 10 configured as described above will be described.

  As shown in FIG. 2, when discharging the content M from the discharge container 10, first, the overcap 16 is removed from the discharge cap 15. After that, in a state where the discharge container 10 is inclined so that the discharge port 14 faces downward from the horizontal surface and is in a discharge posture, the discharge container 10 is pressed inward in the radial direction to be squeezed (elastically deformed), The inner container 11 is deformed together with the outer container 12 to reduce the volume.

  Then, the pressure in the inner container 11 rises, the content M in the inner container 11 presses the valve body portion 44 through the through hole 42, the connecting piece 45 is elastically deformed, and the valve body portion 44 is held in the container. The communication recess 43 is opened by sliding it toward the outside of the inner container 11 along the axis O direction. As a result, the content M in the inner container 11 is discharged to the outside through the through hole 42, the communicating recess 43, the inside of the outer fitting cylinder 40, and the discharge port 14 (see FIG. 2).

  Then, when the pressing force of the contents M in the inner container 11 to the valve body portion 44 is weakened by stopping or releasing the pressing of the discharge container 10, the pressure difference caused by the elastic restoring force of the discharge container 10 is reduced. Thereby, the valve body portion 44 slides inside the inner container 11 along the container axis O direction (see FIG. 3).

  At this time, as shown in FIG. 3, when the valve body portion 44 enters the communication recess 43, the outer peripheral surface of the valve body 44 is brought into sliding contact with the inner peripheral surface of the communication recess 43 and the communication recess 43 and the valve body portion. The gap with 44 is closed. As a result, an inner space 46 in which the content M that has not been returned to the inner container 11 remains is formed between the main body tubular member 23 and the inner plug member 21. The inner space 46 communicates with the discharge port 14, and the valve body portion 44 forms a part of the drawing wall, and the valve body portion 44 blocks communication with the communication recess 43.

  Then, after the inner space 46 is formed in this way, when the valve body portion 44 continuously slides in the communication recess 43 along the container axis O direction, the contents of the inner space 46 are accompanied by the sliding. The product will increase. As a result, the content M in the discharge port 14 can be drawn into the inner space 46, and the air A can be sucked into the discharge port 14 from the outside.

  Here, when the pressing of the container body 13 is released in a state where the communication recess 43 is closed by the valve body portion 44, the outer container 12 tries to be restored and deformed while the inner container 11 is deformed and reduced in volume. At this time, a negative pressure is generated between the inner container 11 and the outer container 12, and this negative pressure acts on the check valve 41 through the intake hole 19 to open the check valve 41. Then, the outside air is sucked between the outer container 12 and the inner container 11 through the outside air introduction hole 34, the outside air circulation hole 28, the communication groove 20, and the intake hole 19 (see FIG. 3). Then, when the internal pressure between the outer container 12 and the inner container 11 rises to the atmospheric pressure, the check valve 41 is restored and deformed to shut off the intake hole 19 from the outside. As a result, the volume-reduced shape of the inner container 11 is retained after the content M is discharged.

  When the outer container 12 of the container body 13 is squeezed again from this state, the check valve 41 is in the closed state, so that the internal pressure between the outer container 12 and the inner container 11 becomes a positive pressure. The inner container 11 is deformed and reduced in volume by the pressure, and the contents M are discharged by the above-described action.

  After the content M is discharged and before the communication container 43 is closed by the valve body 44, the discharge container 10 is not only stopped but also released, the inner container 11 follows the outer container 12. Then try to restore and transform. Then, the pressure in the inner container 11 is reduced and a negative pressure is generated. This negative pressure acts on the valve body portion 44, so that the valve body portion 44 moves inside the inner container 11 along the container axis O direction. It will be slid smoothly toward.

  As described above, according to the discharge container 10 of the present embodiment, after the content M is discharged, the content M in the discharge port 14 is drawn into the inner space 46, and air is externally supplied into the discharge port 14. Since A can be sucked, it is possible to prevent the content M that has not been returned to the inner container 11 from remaining in the discharge port 14. Accordingly, it is possible to prevent the content M from leaking from the ejection port 14 after the content M is ejected.

  Further, since the diameter of the through hole 42 is smaller than that of the communication recess 43, even if the valve body portion 44 is unintentionally displaced inside the inner container 11 along the axial direction, the flange portion of the valve body portion 44 may be displaced. However, the stopper body 47 comes into contact with the annular upper end surface of the communication tubular portion 22, and the above-described displacement of the valve body portion 44 can be regulated.

  Further, as in the present embodiment, when the valve body portion 44 is in contact with the plug body 47 when the discharge container 10 is not operated, the communication between the communication recess 43 and the through hole 42 is made by the valve body portion 44. Can be shut off. Further, in this case, when the valve body portion 44 is restored and displaced after the content M is discharged to form the inner space 46 as described above, the valve body portion 44 causes the communication recessed portion 43 to move inside the container 43. It can slide over the entire length in the axis O direction. As a result, the inner volume of the inner space 46 can be reliably increased, and the above-described effects can be remarkably achieved.

  Further, since the inner cap cylinder portion 37 is provided in the overcap 16, it is possible to prevent the contents M from leaking out of the discharge port 14 unexpectedly while the overcap 16 is closed. Further, as described above, after the contents M are discharged, the contents M that have not been returned to the inner container 11 are less likely to remain in the discharge port 14, and therefore the overcap 16 is discharged after the contents M are discharged. 15, when the inner seal tubular portion 37 is fitted into the discharge port 14, the inner seal tubular portion 37 pushes the contents M out of the discharge port 14 or the contents of the inner seal tubular portion 37. It is possible to suppress the adhesion of the object M.

<Structure for suppressing the generation of noise (abnormal noise) when inhaling outside air>
Subsequently, a configuration for suppressing the generation of noise (abnormal noise) of the check valve 41 in the discharge container 10 of the present embodiment will be described below (see FIG. 22 and the like). The check valve 41 bends when the outside air is sucked in between the outer container 12 and the inner container 11, and the lip portion 41a is separated from the valve seat 31a so that the outside air introduction hole 34 and the suction hole 19 are formed. And communicate with.

(Sounding mechanism)
We have come to the knowledge that the mechanism of sounding during inhalation of outside air is as follows. That is, the air introduced from the outside air introduction hole 34 separates the lip portion 41a that was in contact with the valve seat 31a, passes through the gap formed between them, passes through the outside air circulation hole 28, the intake hole 19, and the inner container. It flows into between 11 and the outer container 12 (refer FIG. 3 grade). At this time, in particular, when the pressure of the air flowing inside the air flow path in the vicinity of the check valve 41 changes and the low pressure state and the high pressure state alternate, the vibration of the check valve 41 is excited. (Refer to FIG. 16), it is considered that this causes air sparseness and denseness, which causes a noise (abnormal noise) phenomenon.

  Further, when the vibration of the check valve 41 was repeatedly examined, the following findings were obtained. That is, the vibration of the check valve 41 caused by the change in pressure appears as an overlap of a plurality of waves (for example, a fundamental wave and a harmonic wave of 3000 Hz, 6000 Hz, 9000 Hz, ...) (see FIG. 19). In the check valve 41 having an annular shape, the fundamental wave and the higher harmonic waves can be represented as waves equally divided in the circumferential direction. For example, a wave of 3000 Hz is represented as a wave that divides the check valve 41 into six parts (in other words, a wave that circulates one of the six divided parts as a half wavelength) (FIGS. 20 and 21). reference). The 6000 Hz wave is represented as a wave that divides the check valve 41 into eight equal parts, and the 9000 Hz wave is represented as a wave that divides the check valve 41 into ten equal parts (see FIG. 18).

  Here, focusing on the magnitudes of the plurality of waves, that is, the magnitudes of the amplitudes, it can be seen that 3000 Hz is the largest, and 6000 Hz, 9000 Hz, ... 19). Generally, it is said that the human audible range is from 20 Hz to 20000 Hz (20 kHz), and if the amplitude is large, the sound pressure level is large. Therefore, in the case of this example, the sound of 3000 Hz can be suppressed. If possible, it is possible to greatly suppress abnormal noise when inhaling the outside air.

(Vibration model of check valve)
Next, a vibration model of the check valve 41 when inhaling the outside air will be described. As described above, the wave of 3000 Hz becomes a wave that circulates with one divided into six as a half wavelength. For example, when the outside air introduction hole 34 is arranged only at the 12 o'clock position in FIG. 20, the deflection at the time of vibration is + (plus) in the upward direction along the container axis O, and − in the downward direction. If expressed as (minus), it becomes a vibration model in which plus and minus are repeated every 60 ° (see FIGS. 20 and 21). The portion directly below the outside air introducing hole 34 receives the inflowing air and bends downward, so that it becomes negative (see FIG. 21).

(Example of Arrangement of Outside Air Inlet 34 (1))
Based on the above-described vibration model, in the check valve 41 shown in FIG. 22, two outside air introduction holes 34 are provided with the main purpose of canceling out the vibration due to the wave of 3000 Hz among the vibrations of the check valve 41 at the time of inhaling the outside air. One is a position 30 degrees counterclockwise from the center line (a line that crosses the container axis O and is indicated by a reference symbol C) (if the 12 o'clock-6 o'clock line is the center line C, the 11 o'clock position) , And the other is arranged at a position of 30 ° clockwise from the center line C (position at 1 o'clock) (see FIG. 22). In other words, these two outside air introduction holes 34 are arranged so as to form a center angle of 60 °, and if the bisector between them is the centerline C, they are arranged line-symmetrically with the centerline C as the axis of symmetry. It can be said that it has been done.

  As a result of being arranged in this way, these two outside air introduction holes 34 are in a state in which there is an interval corresponding to half the wavelength when the check valve 41 vibrates (see FIGS. 20, 21, and 22). ). Looking at the mode amplitudes by the two outside air introducing holes 34 arranged in this way, the mode amplitude by the air flowing in from the outside air introducing hole 34 on the left (11:00) and the outside air introducing hole on the right (1:00) The phase is opposite to the mode amplitude due to the air flowing in from 34 (see FIG. 23). Therefore, if the mode amplitudes having opposite phases are superposed, the respective vibrations cancel each other (see FIG. 22). In addition, in the figure, the superposition is represented by the symbol "&" (see FIG. 22 and the like).

(Example of arrangement of outside air introduction hole 34 (2))
In the check valve 41 shown in FIG. 24, two outside air introduction holes 34 are provided, one of which is at a position 90 ° counterclockwise from the center line C (if the 12 o'clock-6 o'clock line is the center line C, the Position) and the other at a position of 90 ° clockwise from the center line C (position at 3 o'clock) (see FIG. 24). In other words, these two outside air introduction holes 34 are arranged at positions facing each other with a central angle of 180 °. If the centerline C between them is the axis of symmetry, these two outside air introduction holes 34 are arranged line-symmetrically.

  As a result of being arranged in this way, these two outside air introduction holes 34 are in a state of being provided with an interval corresponding to an odd multiple (three in this example) of half the wavelength when the check valve 41 is vibrating. (See FIGS. 20, 21, and 24). Looking at the mode amplitudes of the two outside air introduction holes 34 arranged in this way, the mode amplitude due to the air flowing in from the outside air introduction hole 34 on the left (9 o'clock) and the outside air introduction hole on the right (3 o'clock) The phase is opposite to the mode amplitude due to the air flowing in from 34. Therefore, if the mode amplitudes having opposite phases are superposed, the respective vibrations cancel each other (see FIG. 24).

  As described above, according to the configurations illustrated as the arrangement example (1) and the arrangement example (2), it is possible to cancel the vibration due to the wave of 3000 Hz among the vibrations of the check valve 41 during the intake of the outside air. According to this, the generation of abnormal noise is suppressed as a result of the decrease in air pressure fluctuation.

(Comparative example (1) of arrangement of outside air introduction holes 34)
In the check valve 41 shown in FIG. 25, two outside air introduction holes 34 are provided, one of which is at a position 60 ° counterclockwise from the center line C (if the 12 o'clock-6 o'clock line is the center line C, the Position), and the other is arranged at a position (clockwise position) at 60 ° clockwise from the center line C (see FIG. 25). If the centerline C between them is the axis of symmetry, these two outside air introduction holes 34 are arranged line-symmetrically.

  Looking at the mode amplitudes by the two outside air introduction holes 34 arranged in this way, the mode amplitude by the air flowing in from the left (10 o'clock) outside air introduction hole 34 and the right (2 o'clock) outside air introduction hole The phase is the same as the mode amplitude due to the air flowing in from 34. Therefore, when the mode amplitudes are overlapped, the respective vibrations strengthen each other (see FIG. 25). Therefore, this arrangement example is not suitable for canceling the vibration due to the wave of 3000 Hz out of the vibration of the check valve 41 during the intake of the outside air.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention. For example, the specific frequency described above (3000 Hz or the like) is merely an example. This is the frequency at which the sound pressure level is highest in the check valve 41 of the discharge container 10 of a certain size (for example, 450 ml), and the specific frequency is the size of the discharge container 10 and the check valve 41. It can be changed according to the material.

  Further, although the number of the outside air introducing holes 34 is two in the above-described embodiment, the number may be more than this. In short, the specific number is not limited as long as the plurality of outside air introduction holes 34 are arranged at the positions where the vibrations of the check valve 41 during air intake are canceled out.

  In addition, in the above-described embodiment, an example in which the two outside air introducing holes 34 are arranged in the check valve 41 is shown as a good example of the plurality of outside air introducing holes 34 arranged (see FIG. 22, etc.). The term "two" means that substantially two are arranged. That is, if the two outside air introduction holes 34 are connected by, for example, a thin slit, it is formally one hole, but if attention is paid to the function of canceling the vibration of the check valve 41 at the time of inhaling the outside air, it is substantially effective. It can be said that two outside air introduction holes 34 are arranged.

  Further, in the above-described embodiment, a plurality (two) of outside air introduction holes 34 having the same shape and hole area are illustrated (see FIG. 22 and the like), but this is also a preferable embodiment of the present invention. . The plurality of outside air introduction holes 34 do not have to have the same shape or have the same hole area. Further, as a result, the plurality of outside air introduction holes 34 may not be symmetrically arranged. In short, even if the shapes and the hole areas are the same or different, the plurality of outside air introduction holes 34 may be arranged so as to cancel the vibration of the check valve 41 at the time of sucking outside air.

  Although the single outside air introduction hole 34 shown in FIGS. 6 and 7 is provided, this is merely a general outside air introduction hole 34. From the viewpoint of reducing abnormal noise when inhaling the outside air, it is preferable to arrange the plurality of outside air introduction holes 34 at predetermined positions, and the contents of the both do not contradict each other.

  INDUSTRIAL APPLICABILITY The present invention is suitable for being applied to a discharge container having a laminated peeling structure and a discharge cap having an emulsified liquid, a modified starch mixture, a liquid food and the like as contents.

10 ... Discharge container 11 ... Inner container 12 ... Outer container 13 ... Container body 14 ... Discharge port 15 ... Discharge cap 19 ... Intake hole 31a ... Valve seat 34 ... Outside air introduction hole 41 ... Check valve C ... Center line M ... Contents O ... Container axis (center axis)

Claims (5)

A flexible inner container that accommodates a liquid food and is deformed by a decrease in the amount of the liquid food, and the inner container is provided internally for elastically deforming and sucking outside air between the inner container and the container. A container body having an outer container in which an intake hole is formed,
A discharge port for discharging the liquid food is formed on the top surface portion, and a discharge cap attached to the mouth portion of the container body,
An outside air introduction hole communicating between the outside and the intake hole,
A valve seat provided in the vicinity of the flow path of the outside air introduced from the outside air introduction hole,
The outer peripheral portion has a lip portion that sits on the valve seat, and bends by receiving the outside air introduced from the outside air introduction hole during the outside air suction when the outside air is sucked between the outer container and the inner container. A state in which the lip portion is separated from the valve seat to communicate the outside air introduction hole with the intake hole; and a state in which the lip portion contacts the valve seat to block the outside air introduction hole and the intake hole. An annular check valve that switches between
A discharge container comprising:
When outside air intake, when the vibration can occur represented one of equally divided circumferential length in the circumferential direction of the check valve to the check valve as a wave circulating as a half-wavelength, a pair The plurality of outside air introducing holes are in the opposite phase of the vibration in the circumferential direction of the check valve with an interval corresponding to an odd multiple of half the wavelength when the check valve vibrates , and the check valve becomes the opposite phase of the vibration. Discharge container that is placed in a position to cancel the vibration of. Before SL plurality of outside air inlet holes, the center line crossing the center axis of the check valve are arranged line-symmetrically as symmetry axis, the discharge vessel of claim 1. The hole area of the plurality of outside air inlet holes are identical, dispensing container according to claim 1 or 2. Wherein the plurality of the same shape of the outside air introduction hole, the discharge container according to any one of claims 1 to 3. A flexible inner container that accommodates a liquid food and is deformed by a decrease in the amount of the liquid food, and the inner container is provided internally for elastically deforming and sucking outside air between the inner container and the container. A discharge cap attached to the mouth of a container body having an outer container having an intake hole,
An outside air introduction hole communicating between the outside and the intake hole,
A valve seat provided in the vicinity of the flow path of the outside air introduced from the outside air introduction hole,
The outer peripheral portion has a lip portion that sits on the valve seat, and bends by receiving the outside air introduced from the outside air introduction hole during the outside air suction when the outside air is sucked between the outer container and the inner container. A state in which the lip portion is separated from the valve seat to communicate the outside air introduction hole with the intake hole; and a state in which the lip portion contacts the valve seat to block the outside air introduction hole and the intake hole. An annular check valve that switches between
Is equipped with
When outside air intake, when the vibration can occur represented one of equally divided circumferential length in the circumferential direction of the check valve to the check valve as a wave circulating as a half-wavelength, a pair The plurality of outside air introducing holes are in the opposite phase of the vibration in the circumferential direction of the check valve with an interval corresponding to an odd multiple of half the wavelength when the check valve vibrates , and the check valve becomes the opposite phase of the vibration. Discharge cap for the discharge container, which is arranged at the position to cancel the vibration of.