JP2018002216A - Container with gas vent mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container with gas vent mechanism capable of venting the gas in a container without back-flow of ambient air and capable of easily producing with simple structure.SOLUTION: The containers 1, 40, 50, 60, 70 with gas vent mechanism comprise a container body 2 housing a content, and a cap 3 provided at a mouth cylindrical part 2a of the container body 2 and closing the cylindrical part 2a. The cap 3 has: a cap body 4 having a peripheral wall 11 detachably mounted to the cylindrical part 2a, and a top wall 12 which covers the upper part of the peripheral wall 11 and has a communication hole 20 formed to communicate the inside of the container with the outside thereof; and a lid body 5 which is bonded integrally to the cap body 4 via a hinge 16, covers the top wall 12 and forms a discharge flow channel P connecting to outside from the communication hole 20 between itself and the cap body 4. The lid body 5 is formed elastically deformably in accordance with the inner pressure elevation of the container body 2, and the seal portions 6, 71 for opening and closing the discharge flow channel P in accordance with the elastic deformation of the lid body 5 are provided between the lid body 5 and the cap body 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a container suitable for containing contents that may increase the internal pressure due to gas generation or the like, and more specifically, by providing a gas venting mechanism, when the internal pressure of the container body increases. The present invention relates to a container with a degassing mechanism capable of discharging internal gas.

  For example, a product that generates carbon dioxide gas such as roasted coffee beans is hermetically stored, and a product equipped with a check valve for releasing gas in the bag on the side of a plastic film packaging bag. Are known.

  However, such packaging bags have a problem that the contents are easily scattered when used by consumers, and the operation of sealing the mouth with a clip or the like is troublesome and difficult to completely seal during storage. is there.

  On the other hand, a container formed by screwing a cap on the mouth of a bottle-shaped or jar-shaped resin container body has excellent sealing performance and can be easily re-sealed during storage. In order to accommodate the gas generating product in the inside, it is necessary to provide some pressure relief mechanism.

  In this regard, Patent Document 1 discloses a container cap that includes an exterior made up of a peripheral wall that is screwed into a mouth tube portion of a container body and a top plate that covers an upper portion of the peripheral wall. A bottomed cylindrical body is suspended in the direction of the container body from the periphery of the hollowed portion of the circular closed plate with the peripheral portion closed and the center cut out, and an air flow hole is formed in the peripheral wall of the bottomed cylindrical body. A proposal has been made in which an inner plug, which is covered with an air-permeable semipermeable membrane that is impermeable to gas, is disposed in the exterior.

Utility Model Registration No. 2556499

  However, in the container cap described in Patent Document 1, when the internal pressure of the container rises, the gas in the container can be extracted through the semipermeable membrane and the air circulation hole, but the pressure outside the container becomes higher than the internal pressure. On the contrary, the outside air may enter the container, and the contents as a product may be discolored or deteriorated in flavor due to oxidation. Also, when manufacturing this container cap, first, the bottomed cylindrical body with the air circulation hole and the closed body are integrated, and a semipermeable membrane is provided on the bottomed cylindrical body to form an inner plug After that, it is necessary to combine the inner plug and the exterior, and the assembly work is complicated. Therefore, it takes time to manufacture, and there is room for improvement in that respect.

  The present invention has been made in view of the above-described problems, and is equipped with a gas venting mechanism that allows the gas in the container to be vented and that the outside air does not flow backward and that can be easily manufactured with a simple structure. The purpose is to provide a container.

The present invention has been made to solve the above problems, and the container with a degassing mechanism of the present invention is
A container body that contains contents, and a cap that is provided in a mouth tube portion of the container body and closes the mouth tube portion,
The cap has a peripheral wall that is detachably attached to the mouth tube part, a cap body that covers the upper part of the peripheral wall and has a top wall in which a communication hole that communicates with the inside and outside of the container is formed, and the cap body via a hinge And a lid that covers the top wall and is integrally connected to the cap body to form a discharge channel that leads to the outside from the communication hole,
The lid is formed to be elastically deformable with an increase in internal pressure of the container body,
Between the lid body and the cap body, a seal portion that opens and closes the discharge flow path with the elastic deformation of the lid body is provided.

  In the container with a gas venting mechanism according to the present invention, the seal portion includes a valve seat formed at a peripheral edge of the communication hole, and a valve seat that is suspended from the lid body toward the top wall. It is preferable to have a protrusion seated on the surface.

  Moreover, in the container with a gas venting mechanism according to the present invention, it is preferable that the lid body has a thin wall portion formed along a proximal end peripheral edge portion of the protrusion.

  Furthermore, in the container with a gas venting mechanism of the present invention, it is preferable that a particulate passage restriction means is provided on the upstream side of the communication hole.

  Alternatively, in the container with a gas venting mechanism according to the present invention, a packing with a slit is provided between the mouth tube portion and the top wall of the cap body to seal between them, and the packing is powdered. It is also preferable to serve as a body passage restricting means.

  In the container with a gas venting mechanism of the present invention, when a product that generates a gas such as carbon dioxide gas such as roasted coffee beans is accommodated in the container body, gas is generated from the product, and the internal pressure of the container body is reduced. When it rises, the lid is elastically deformed and the discharge channel closed by the seal portion is opened, and the gas in the container body is discharged to the outside through the communication hole and the discharge channel. When the internal pressure in the container body decreases due to the discharge of the gas, the lid body is elastically restored to the original position, the discharge flow path is closed again by the seal portion, and the backflow of the outside air is prevented.

  Therefore, according to the container with a gas venting mechanism of the present invention, the gas in the container can be vented and the backflow of outside air can be prevented. In the container with a gas venting mechanism of the present invention, since the cap body and the lid are integrally coupled via a hinge, the number of parts is small, and there is no need for mutual alignment. It can be assembled by a simple operation of closing against.

It is a side view which shows the container with a degassing mechanism of one Embodiment according to this invention in a partial cross section. (A) is sectional drawing which expands and shows a part of container with a gas venting mechanism of FIG. 1, (b) is sectional drawing which showed a mode that internal gas was discharged | emitted with the raise of the internal pressure of a container main body. is there. It is a side view which shows the container with a degassing mechanism of other embodiment according to this invention provided with the granular material passage control means in a partial cross section. (A) is the elements on larger scale which showed a mode that internal gas was discharged | emitted with the raise of the internal pressure of a container main body in the container with a gas venting mechanism of FIG. 3, (b) is A in FIG. 4 (a). It is sectional drawing which follows the -A line. It is a fragmentary sectional view of the container with a gas venting mechanism of further another embodiment according to the present invention which shows a modification of granular material passage regulation means. It is a side view which shows the container with a gas venting mechanism of further another embodiment according to this invention in a partial cross section. It is a top view of the packing provided in the container with a gas venting mechanism of FIG. FIG. 8 is a partial cross-sectional view showing how the internal gas is discharged as the internal pressure of the container body increases in the container with a gas venting mechanism in FIG. 7. (A) is the fragmentary sectional view which showed the container with the gas venting mechanism of further another embodiment according to this invention, (b) is a container with the gas venting mechanism of FIG. It is the fragmentary sectional view which showed a mode that internal gas was discharged | emitted with.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a container with a gas venting mechanism (hereinafter also simply referred to as “container”) according to an embodiment of the present invention in partial cross section, and FIG. 2 (a) is the container of FIG. It is sectional drawing which expands and shows a part of (b), (b) is sectional drawing which showed a mode that internal gas was discharged | emitted with the raise of the internal pressure of a container main body.

  As shown in FIG. 1, the container 1 of the present embodiment mainly includes a container body 2 and a cap 3 attached to the mouth tube portion 2 a of the container body 2, and the cap 3 is provided in the container body 2. A cap body 4 and a lid body 5 that divide the discharge flow path P when the gas is discharged; a seal portion (valve) 6 that opens and closes the discharge flow path P in accordance with a change in the internal pressure of the container main body 2; have.

  The container body 2 is a bottomed cylindrical container body in which a mouth tube portion 2a, a shoulder portion 2b, a body portion 2c and a bottom portion 2d are integrally formed in order from the top along the container axis O. In this example, A bottle-type container body in which the mouth tube portion 2a is significantly smaller in diameter than the body portion 2c through the conical shoulder portion 2b is adopted. A male screw 7 is engraved on the outer peripheral surface of the mouth tube portion 2 a of the container body 2. The container body 2 is generally made of a synthetic resin. For example, a main material resin layer made of polyethylene terephthalate (PET) resin, polypropylene (PP) resin, or the like is coated with ethylene vinyl alcohol copolymer (EVOH) as an inner layer, an intermediate layer, or an outer layer. ) When a laminated container body in which a gas barrier resin such as a resin is laminated is used, the gas barrier property can be satisfactorily exhibited, and deterioration in quality due to oxidation of the contents can be stably suppressed for a long period of time. . Such a laminated container body can be manufactured by extrusion blow molding (EBM). The material of the container body 2 is not particularly limited, and may be a single layer structure such as PET resin or PP resin, or may be a container body made of any material such as glass or metal. May be. Further, the molding method is not limited to extrusion blow molding, and a method of biaxial stretch blow molding of a preform formed by injection molding may be employed.

  The cap 3 is made of synthetic resin and has a cylindrical peripheral wall 11 attached to the mouth tube portion 2a of the container main body 2 and a top wall 12 covering the upper portion of the peripheral wall 11 as shown in FIG. 4 and a lid body 5 that closes the top wall 12 of the cap body 4 are integrally formed. The cap 3 can be manufactured by injection molding. The lid 5 is rotatably supported on the peripheral wall 11 of the cap body 4 via a hinge 16 provided at a position on the right side when viewed from the container axis O in FIG. 2, and the lid 5 is rotated around the hinge 16. In the state where the top wall 12 of the cap body 4 is closed, the discharge flow path P is formed between the lid body 5 and the cap body 4. A female screw 17 is formed on the inner peripheral surface of the peripheral wall 11 of the cap main body 4 so as to be engaged with the male screw 7 formed on the outer peripheral surface of the mouth tube portion 2 a of the container main body 2.

  The top wall 12 of the cap body 4 is provided with a fitting cylinder 18 that is fitted inside the mouth tube portion 2a of the container body 2 to enhance the sealing performance, and a circular recess r having a reduced thickness is formed on the inner upper surface thereof. Is formed. Further, a communication hole 20 is formed in the center of the depression r of the top wall 12 to communicate the inside and outside of the container and to form the inlet of the discharge channel P. The communication hole 20 is formed with a valve seat 20a having a tapered surface or a curved surface whose diameter is increased on the upper surface side. The diameter of the outer peripheral surface of the top wall 12 is larger than the outer diameter of the peripheral wall 11 so that a later-described side wall 22 of the lid 5 is flush with the peripheral wall 11 of the cap body 4 when the top wall 12 is closed with the lid 5. It is formed small. Further, convex portions 23 projecting radially outward are formed on the outer peripheral surface, and vertical grooves 24 constituting a part of the discharge channel P are formed at a plurality of locations on the outer peripheral surface of the top wall 12. ing.

  The lid 5 is formed along the top wall 12 of the cap body 4, and a circular top plate 26 that defines a part of the discharge flow path P between the lid 5 and the cap body from the periphery of the top plate 26. 4 and the cylindrical side wall 22 extending toward the upper surface of the peripheral wall 11. The top plate 26 includes a circular thick portion 26a disposed on the radially inner side and an annular thin portion 26b formed on the radially outer side of the thick portion 26a. A projection 28 having a U-shaped cross section as a valve body is formed in the thick portion 26 a corresponding to the position of the communication hole 20 formed in the top wall 12 of the cap body 4. In the present embodiment, the protrusion 28 contacts the valve seat 20a formed on the periphery of the communication hole 20 with a line or surface, and constitutes the seal portion 6 together with the valve seat 20a. The thickness and radial length of the thin-walled portion 26b keep the sealing function (backflow prevention function) by pressing the protrusion 28 against the valve seat 20a of the communication hole 20, while the inner pressure of the container body 2 increases to a predetermined height. It is set to such an extent that it can be elastically deformed when the pressure is applied and the projection 28 can be separated from the valve seat 20a. In addition, a thin portion 29 for absorbing core misalignment of the projection 28 is formed in the thick portion 26 a along the base end peripheral portion of the projection 28. The inner peripheral surface of the side wall 22 of the lid 5 has a convex portion 30 that fits in a non-detachable (fitted state) with the convex portion 23 formed on the outer peripheral surface of the top wall 12 of the cap body 4. . “Fitting so as not to be disengaged” means fitting so that the fitting between the convex portion 23 and the convex portion 30 is not released by the opening force acting on the lid body 5 via the projection 28 when the internal pressure in the container body 2 increases. It is sufficient that the lids 5 are fitted together so that the lid 5 is not opened by an unexpected external force.

  Such a container 1 is suitable as a container for containing a product that generates a gas such as carbon dioxide such as roasted coffee beans. For example, when roasted coffee beans are stored in the container body 2 as shown in FIG. 1, carbon dioxide gas is generated from the coffee beans, and the internal pressure of the container body 2 increases. When the internal pressure of the container body 2 exceeds a predetermined pressure, that is, when the rising pressure acting on the protrusion 28 through the communication hole 20 exceeds a predetermined value, the thin wall of the top plate 26 of the lid 5 is shown in FIG. The portion 26 b is elastically deformed and the projection 28 is separated from the valve seat 20 a at the periphery of the communication hole 20, so that the carbon dioxide gas in the container body 2 flows into the discharge flow path P, that is, the communication hole 20, the top plate 26 of the lid 5. The gap g between the top wall 12 of the cap body 4, the longitudinal groove 24 formed on the outer peripheral surface of the top wall 12, and the side wall 22 of the lid 5 and the upper surface of the peripheral wall 11 of the cap body 4 is passed in this order. Discharged outside. Then, when the carbon dioxide gas in the container body 2 is discharged and the internal pressure becomes a predetermined value or less, the top plate 26 of the lid 5 is elastically restored to the original shape, so that the protrusion 28 is the valve seat 20a at the periphery of the communication hole 20. The backflow of outside air is prevented.

  Therefore, according to the container 1 of this embodiment, the gas in the container 1 can be extracted, the outside air does not flow backward, and the good quality of the product in the container 1 can be maintained for a long time. The cap 3 is mainly composed of a cap body 4 and a lid body 5 which are integrally molded, and has a small number of parts and a simple structure. The cap body 4 and the lid body 5 are integrally connected via a hinge 16. Therefore, the mutual alignment is unnecessary, and the lid body 5 can be assembled by a simple operation of closing the cap body 4.

  Further, like the container 1 of the present embodiment, the seal portion 6 is composed of a valve seat 20a formed on the periphery of the communication hole 20, and a projection 28 that is suspended from the lid 5 and seats on the valve seat 20a. When configured, it is possible to obtain uniform and high sealing performance.

  Further, as in the case of the container 1 of the present embodiment, in the case where the lid 5 is provided with the thin portion 29 formed along the peripheral edge of the proximal end of the projection 28, the projection is caused by the inclination of the projection 28, etc. Even when 28 has a misalignment with respect to the valve seat 20a, the misalignment can be absorbed and the protrusion 28 can be reliably seated on the valve seat 20a.

  Further, when the lid body 5 is detachably fitted to the cap body 4 as in the container 1 of the present embodiment, it acts on the lid body 5 via the protrusion 28 when the internal pressure in the container body 2 rises. It is possible to prevent the lid body 5 from being opened by the opening force, and it is possible to surely obtain the gas venting and backflow prevention functions by the seal portion 6, and in addition, an unexpected external force is applied to the lid body 5 and the like. Inadvertent opening of the lid 5 when it is added can be avoided, and the contents can be prevented from being scattered and foreign matter mixed into the container.

  Next, a container 40 according to another embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the element similar to the element demonstrated in previous embodiment, and detailed description is abbreviate | omitted.

  The container 40 of this embodiment is suitable for accommodating a granular material such as ground beans as the contents. When powdered contents are accommodated, there is a possibility that the powder particles adhere to the communication holes 20 and the gas does not escape normally. Therefore, the container 40 of this embodiment is provided with the granular material passage control means 41 which allows gas to pass through the upstream of the communicating hole 20, but does not allow the granular content to pass through, as shown in FIG. Specifically, the granular material passage restricting means 41 has a circular shape in which at least one (four in the illustrated example) gas vent grooves 42a are formed along the container axis O on the peripheral surface thereof as shown in FIG. Disc body 42 and a cylindrical body 44 that holds the disc body 42 by fitting on the lower surface side of the top wall 12 of the cap body 4 and covers the open side of the gas vent groove 42a. A chamfered portion 42b is formed on the front and back edges of the disk body 42 to ensure a gas flow path. In addition, in order to ensure a narrow flow path for allowing only gas to flow between the disk body 42 and the lower surface of the top wall 12 of the cap body 4, at least one of the lower surface of the top wall 12 along the radial direction ( Four ribs 45 are formed in the illustrated example. The depth of the gas vent groove 42a and the height of the rib 45 are preferably smaller than the minimum diameter of the granular material accommodated in the container. The rib 45 is formed on the lower surface of the top wall 12 of the cap body 4 as shown in the figure, so that there is an advantage that there is no need to align the vertical direction when the disk body 42 is set. It may be provided.

  According to the container 40 of this embodiment, in addition to having the effect of the container 1 of the previous embodiment, it is possible to prevent powdered contents such as ground beans from adhering to the communication hole 20. The gas can be surely removed.

  FIG. 5 shows another embodiment of the granular material passage restriction means. In the container 50 shown in FIG. 5, the granular material passage restriction means is constituted by a mesh ring 51 having a mesh 51b that allows gas to pass through the opening end of the ring body 51a but does not allow the contents to pass. The mesh ring 51 is disposed so as to face the communication hole 20 formed in the top wall 12 of the cap body 4 and is press-fitted and held in a cylindrical body 52 suspended from the lower surface of the top wall 12. Also with such a container 50, it is possible to prevent powdered contents such as ground beans from adhering to the communication hole 20, and gas can be reliably vented.

  Next, a container according to still another embodiment of the present invention will be described with reference to FIGS. As shown in this figure, this embodiment employs a wide jar-type container body as the container body 2. In addition, the same code | symbol is attached | subjected about the element similar to the element demonstrated in previous embodiment, and detailed description is abbreviate | omitted.

  In the bottle-type container bodies 1, 40, and 50, the diameter of the mouth tube portion 2a is small, so that the fitting tube 18 is suspended from the top wall 12 of the cap body 4 and inserted into the mouth tube portion 2a. However, in the case of the wide container body 2a as in the present embodiment, the fitting cylinder 18 is suspended from the top wall 12 of the cap body 4 and is fitted into the mouth cylinder portion 2a. Since the circumference is long, there is a possibility that uniform sealing performance cannot be obtained. Therefore, the container 60 of the present embodiment is an elastic made of rubber or resin that seals between the mouth tube portion 2a of the container body 2 and the top wall 12 of the cap body 4 instead of the fitting cylinder 18. A deformable packing 61 is provided.

  As shown in FIG. 7A, the packing 61 is circular, and is made of, for example, a low-resilience PE sheet, and is provided with four slits (cuts) 61a that intersect each other at right angles (cross shape) at the center. . The packing 61 is preferably laminated with, for example, a PP resin film. Further, as shown in FIG. 6, the lower surface of the top wall 12 of the cap body 4 has a concave curved surface with the position of the communication hole 20 as the deepest portion in order to allow the deformation of the packing 61 accompanying the increase in internal pressure of the container body 2. 12a is formed. As shown in FIGS. 7B and 8, when the packing 61 is bent and deformed, the slit 61 a is opened, and the gas in the container body 2 enters the communication hole 20. At this time, in the present embodiment, the opening of the slit 61a is made smaller than the diameter or width of the communication hole 20 to prevent the powdery contents from adhering to the communication hole 20, and thus excessive deformation of the packing 61 is caused. It is regulated. The deflection deformation of the packing 61 can be adjusted by the depth at the deepest portion of the concave curved surface 12a, and this depth is preferably smaller than the diameter or width of the communication hole 20, and the granular material as the contents It is more preferable to make it smaller than the particle diameter. Thus, the granular material cannot pass through the slit 61a, and the packing 61 with the slit 61a also has the function of the granular material passage restriction means.

  In the present embodiment, the top plate 26 of the lid 5 has a circular thin-walled portion 62a that hangs down a protrusion 28 as a valve body and elastically deforms when the internal pressure of the container body 2 exceeds a predetermined pressure, It has an annular thick portion 62b that is located on the outer side in the radial direction and supports the thin portion 62a. In this way, the thin-walled portion 62a that is elastically deformed and deformed as the internal pressure of the container body 2 increases is arranged on the radially inner side, and the thick-walled portion 62b that supports the thin-walled portion 62b is arranged on the radially outer side. The communication hole 20 can be opened and closed by reliably bending and deforming the top plate 26 while ensuring rigidity.

  Next, a container according to still another embodiment of the present invention will be described with reference to FIG. The container 70 of the present embodiment employs a bottle-type container similar to that shown in FIGS. 1 to 5 as the container body 2, but the configuration of the seal portion is different from that of the previous embodiment. In addition, the same code | symbol is attached | subjected about the element similar to the element demonstrated in previous embodiment, and detailed description is abbreviate | omitted.

  In the container 70 of the present embodiment, the seal portion (valve) 71 has an annular shape as a valve seat formed on the top wall 12 of the cap body 4 so as to surround the communication hole 20 as shown in FIG. The seal projection 72 is pressed against the seal projection 72 and the discharge passage P is closed. When the internal pressure of the container body 2 is increased, the valve main body 2 is elastically deformed and separated from the seal projection 72 to open the discharge passage P. And a circular top plate 26. The top plate 26 has a circular thick portion 26a arranged on the radially inner side, and the circular thick portion 26a arranged on the outer side in the radial direction can be displaced up and down in accordance with changes in the internal pressure of the container body 2. And a thin-walled portion 26b for elastic support. In the present embodiment, a plurality of communication holes 20 are provided, but one communication hole 20 may be provided.

  In this embodiment, when the internal pressure of the container body 2 rises as shown in FIG. 9B, the central portion (thick portion 26a) of the top plate 26 is displaced upward by elastic deformation of the thin portion 26b of the top plate 26. Then, it separates from the annular seal projection 72 and the discharge flow path P is opened. Then, the gas in the container body 2 is discharged to the outside through the communication hole 20, the top plate 26 of the lid 5 and the top wall 12 of the cap body 4, through the vertical groove 24 and the gap g. When the pressure in the container body 2 decreases, the top plate 26 returns to its original shape, the thick portion 26a of the top plate 26 is seated on the seal protrusion 72, and the discharge flow path P is closed. Therefore, backflow of outside air can be prevented. It should be noted that also for the container 70 of the present embodiment, as the granular material passage restricting means, the disk body 42 and the cylindrical body 44 shown in FIG. 3, the mesh ring 51 shown in FIG. 5, or shown in FIGS. In addition, a slit-like packing 61 may be provided, and in this way, a container suitable for containing powdered contents can be provided.

  Although the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described embodiment, and various modifications and additions are possible. For example, the seal portion 6 shown in FIGS. 1 to 8 and the seal portion 71 shown in FIG. 9 may be used in combination to provide a double seal portion, which improves the sealing performance (backflow prevention performance). be able to. Further, the number of communication holes 20 is not limited to one, and two or more may be provided. Furthermore, although it demonstrated that the container of this embodiment can be used to accommodate roasted coffee beans and ground beans as contents, this is merely an example, and other foods or foods other than foods are used. It may be used to house.

  According to the container with a degassing mechanism of the present invention, the gas in the container can be extracted, the outside air does not flow backward, and it can be easily manufactured with a simple structure.

DESCRIPTION OF SYMBOLS 1,40,50,60,70 Container with degassing mechanism 2 Container body 3 Cap 4 Cap body 5 Lid 6 Seal part 11 Perimeter wall 12 Top wall 16 Hinge 18 Fitting cylinder 20 Communication hole 20a Valve seat 26 Top plate 28 Projection (Valve)
41 Granule passage restriction means 42 Disc body 42a Gas vent groove 44 Tube 45 Rib 51 Mesh ring (Powder body passage restriction means)
51a Ring body 51b Mesh 61 Packing 61a Slit 71 Seal part 72 Seal protrusion (valve seat)

Claims (5)

A container body that contains contents, and a cap that is provided in a mouth tube portion of the container body and closes the mouth tube portion,
The cap has a peripheral wall that is detachably attached to the mouth tube part, a cap body that covers the upper part of the peripheral wall and has a top wall in which a communication hole that communicates with the inside and outside of the container is formed, and the cap body via a hinge And a lid that covers the top wall and is integrally connected to the cap body to form a discharge channel that leads to the outside from the communication hole,
The lid is formed to be elastically deformable with an increase in internal pressure of the container body,
A container with a gas venting mechanism is provided between the lid body and the cap body, wherein a seal portion that opens and closes the discharge flow path with the elastic deformation of the lid body is provided.   The seal portion includes a valve seat formed on a peripheral edge of the communication hole, and a protrusion that is suspended from the lid body toward the top wall and is seated on the valve seat. The container with a gas venting mechanism according to 1.   The container with a gas venting mechanism according to claim 2, wherein the lid body has a thin wall portion formed along a base end peripheral edge portion of the protrusion.   The container with a gas venting mechanism according to any one of claims 1 to 3, further comprising a particulate passage restriction unit on an upstream side of the communication hole.   A packing with a slit is provided between the mouth tube part and the top wall of the cap main body, and the packing also serves as a granular material passage restricting means. The container with a gas venting mechanism according to any one of 3 to 3.

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