JP6392473B2 - Lid - Google Patents

Description

  The present invention relates to a lid for sealing an opening of a container main body in a storage container that stores and stores a container that needs to be vented (hereinafter simply referred to as “container”) in the container main body. More specifically, the present invention relates to a lid that can prevent air from flowing into the storage container from the outside and surely vent the gas from the storage container while having a simple and compact structure.

  Conventionally, coffee beans after roasting, their ground flour, fermented foods such as miso, solid chemicals and the like generate gas during storage, and therefore the storage container is provided with a gas venting structure.

  As this gas venting structure, a lid that seals the opening of the container body of the storage container in an airtight state is provided, and by forming a gas venting structure on this lid, air inflow from the outside into the storage container is prevented. However, a technique for discharging gas from the stored contents stored in the container main body, for example, carbon dioxide generated from roasted coffee beans or ground powder to the outside is known (for example, see Patent Document 1). ).

  According to this technology, the quality of the contents deteriorates due to contact with the air that has entered, or the internal pressure in the storage container becomes higher than the outside air pressure due to the gas generated from the contents, causing the storage container to be deformed or ruptured. Can be prevented.

JP 2002-34458 A

  However, in order to seal the opening in an airtight state in the above-described technique, an internal thread portion is formed on the inner surface of the cap-shaped lid body, and a cylindrical portion that protrudes from the container body and has an opening at the tip is provided. After forming a male screw part on the outer peripheral surface of the tip of the part, the above-mentioned lid is screwed into the cylindrical part and attached.

  For this reason, the sealing structure is not always simple. Particularly, when the container body is made of metal, glass, ceramic, etc., the processing cost for forming the cylindrical portion and each screw portion becomes high. Furthermore, in order to ensure the airtightness by screwing, it is indispensable to apply a sealing material to the female thread portion of the lid, and the cost of the parts also increases. In addition, since a careful screwing operation is indispensable for mounting the lid, it takes time and time to store and store the contents, and the mounting workability of the lid is inferior.

  In addition, the gas venting structure of the above-described technique is provided with a valve hole in a film stretched in the through hole of the substrate portion of the lid, and a valve vent for gas venting is fixed to the valve hole so that it can be opened and closed by heat welding or the like It is what. For this reason, since the number of parts increases, the part cost is further increased, and a large installation space is required, resulting in an increase in the size of the lid.

  The present invention was devised in view of the above points, and while having a simple and compact structure, it is possible to prevent the inflow of air from the outside into the storage container and to reliably vent the gas from the storage container. An object is to provide a simple lid.

  In order to achieve the above object, the lid of the present invention is provided with a lid support portion that is locked to the opening of the container main body for storing the contents that need to be degassed, and the lid support portion. A lid main body part that is inserted into the opening and forms a communication gap communicating with the outside between the opening inner wall of the opening and the lid main body part. The outer periphery of the closing portion protruding outward by a predetermined amount from the size elastically contacts the inner wall of the opening to close the opening, and the gas pressure in the container body in the closed state acts on the elastic closing portion. And a valve structure in which a predetermined pressure receiving portion is bent preferentially toward the opening side due to a difference in area of the pressure receiving portion.

  A lid support portion that is locked to the opening of the container main body for storing the contents that need to be degassed; and a lid support portion that is connected to the lid support portion and is inserted into the opening, The capacity of the storage space in the container main body can be optimized by the lid main body portion that forms a communication gap communicating with the outside. That is, by changing the distance between the opening and the lid support part and the length of the lid body part, it is possible to adjust the position of the elastic closure part. It is possible to widen the storage space in the container body by widening the separation interval or shortening the length of the lid body part and setting the elastic closing part closer to the opening. Alternatively, if you want to suppress the contact of the stored items with the intruding air as much as possible even if the amount of storage is small, conversely, the spacing interval can be shortened or the length of the lid body can be increased to Can be set closer to the container, and the storage space in the container body can be reduced.

  Furthermore, the lid main body portion that is continuous with the lid support portion and is inserted into the opening to form a communication gap communicating with the outside between the opening inner wall and the opening reduces the component cost. Can do. That is, the gas flowing out through the valve structure can be discharged to the outside using the communication gap, and it is not necessary to provide a special exhaust path separately, and the number of parts can be reduced.

  In addition, an elastic blocker that is provided continuously with the lid main body and that has a closed outer periphery that protrudes outward by a predetermined amount from the inner dimension of the inner wall of the opening in a plan view and elastically contacts the inner wall of the opening to block the opening. By the part, the structure can be simplified, the processing cost, the parts cost can be reduced, and the lid mounting workability can be improved. That is, the elastic closure part of this lid can seal the opening in an airtight state by simply attaching the lid to the container body so that the elastic closure part faces the opening side of the container body, and the screwed structure In addition, it is possible to omit processing operations such as threading, separate members such as a sealing material for ensuring airtightness, and careful screwing operation.

  In addition, due to the difference in the area of the pressure receiving portion where the gas pressure in the container body closed by the elastic closing portion acts, the valve structure in which the predetermined pressure receiving portion bends and opens preferentially to the opening side, thereby reducing the component cost. Reduction and downsizing of the lid can be achieved. That is, a gas venting structure can be formed with a simple configuration that provides a difference in area in the pressure receiving portion of the elastic blockage portion and imparts a valve function to the predetermined pressure receiving portion. It is possible to reduce the number of parts and to reduce the installation space by omitting a complicated structure in which the valve piece is fixed to be openable and closable by heat welding or the like.

  Further, the valve structure is in the elastic closing portion, and in the pressure receiving portion, a valve portion having a larger area than the surroundings, and in the lid main body portion, in a space necessary for opening and closing the valve portion. When the lid is attached, the internal air of the container body can be discharged in a short period of time as the elastic closing part is inserted in an airtight state when the lid is mounted, or the contents are being stored. When a large amount of gas needs to be discharged due to a significant gas discharge from the container, the valve portion is bent largely to the opening side so as to be accommodated in the valve movable recess, thereby obtaining a large valve opening. be able to. This prevents an increase in the internal pressure in the container body when the lid is mounted, thereby reducing the insertion resistance, further improving the mounting workability of the lid, and degassing even if the amount of gas released or stored increases. It can be performed reliably, can accommodate various types of containers and container bodies, and the versatility of the lid is also improved.

  In addition, the valve portion includes a first bent region including an outer periphery of a closing portion that elastically contacts the inner wall of the opening, and a connection boundary line between the valve body portion and the lid main body when receiving pressure. And having a second bent region bent toward the opening side around the center, by utilizing an area larger than the surrounding, an opening sealing function by bending the first bent region on a single valve material, The degassing function by the bending of the following 2nd bending area | region can be provided. As a result, the valve member can be formed as a single body, the cost of parts can be reduced by reducing the number of parts, and the lid can be made more compact by reducing the installation space of the valve part.

  In addition, the valve movable recess of the valve receiving portion has a columnar lid body portion in which one surface of the elastic blocking portion formed in a sheet shape is fixed to one end, and the outer periphery of the body portion of the lid body portion is recessed radially inward. When the valve portion is formed from the exposed portion of the elastic closing portion exposed by forming the valve movable recess to the outer periphery of the closing portion, both the valve receiving portion and the valve portion are part of the lid. It can be formed using the part. As a result, the valve structure can be integrated into the lid body, and the cost of parts can be reduced by reducing the number of parts, and the lid can be made more compact by reducing the installation space.

  Further, when the valve structure has an air vent structure for discharging the air in the bag space to the outside from the bag space sandwiched between the valve receiver portion and the valve portion at the time of pressure reception, the air in the bag space is an air vent structure. Therefore, the bending of the valve portion toward the opening side is not hindered by the compression resistance of the air in the bag space. Thereby, a large valve opening can be easily obtained, and the mounting workability of the lid and the versatility of the lid can be further improved.

  Further, when the air vent structure has an air vent gap formed between the valve receiving portion and the valve portion when receiving pressure, the air in the bag space is vented by using the valve receiving portion and the valve portion. An air vent structure that is discharged to the outside through the clearance for use can be formed. Accordingly, even the air vent structure can be integrated into the lid body, and the cost of parts can be reduced by reducing the number of parts, and the lid body can be made more compact by reducing the installation space.

  In addition, when the valve portion has at least one of a thin-walled structure that is thinner than the surrounding elastic blocking portion and a composite structure that has a larger elastic deformability than the surrounding elastic closing portion, the pressure receiving pressure on which the gas pressure acts In addition to the area difference of the parts, the bending rigidity of the valve part itself can be set low. Thereby, the operation sensitivity of the valve part with respect to the gas pressure in the storage container can be increased, and the gas can be surely vented even if the gas release from the stored item is slight.

  The lid according to the present invention has a simple and compact structure, but can reliably prevent the inflow of air from the outside into the storage container and vent the gas from the storage container.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an overall configuration of a storage container to which a cap, which is a lid according to the present invention, is attached, wherein FIG. 1 (a) is a perspective view showing an appearance with the cap attached, and FIG. It is a perspective view which shows the external appearance of the state which removed from the container main body. It is a perspective view which shows the structure of a cap, Comprising: Fig.2 (a) is a front perspective view of a cap, FIG.2 (b) is a back perspective view similarly. It is a figure which shows the structure of a cap, Comprising: Fig.3 (a) is a top view of a cap, FIG.3 (b) is a front view similarly, FIG.3 (c) is a bottom view. FIG. 4 (a) is a side partial cross-sectional view of the outer periphery of the cap other than the valve portion, FIG. 4 (a) is a side partial cross-sectional view of the portion along line XX in FIG. 3 (a), and FIG. It is the side surface partial sectional view in the state with which the container main body was mounted | worn. It is side surface partial sectional drawing of the cap outer peripheral part in a valve part, Comprising: Fig.5 (a) is a side partial sectional view of the YY arrow part of Fig.3 (a), FIG.5 (b) is a container for a cap. It is the side surface partial sectional view in the state with which the main body was mounted | worn. FIGS. 6A and 6B are explanatory views of the valve opening operation of the valve portion, in which FIG. 6A is a partial cross-sectional side view of the valve portion when the valve is opened, and FIG. FIG. 7A is a partial cross-sectional side view of an outer peripheral portion of a cap having a valve portion according to another embodiment, FIG. 7A is a partial cross-sectional side view of the valve portion having a thin-walled structure, and FIG. It is side surface partial sectional drawing of a valve part. It is a top view of the cap which has a lid support part of another form.

Hereinafter, embodiments of the present invention relating to a lid will be described with reference to the drawings to provide an understanding of the present invention.
The direction indicated by the arrow F in FIG. 1 is the front, the direction indicated by the arrow U is the upper side, and the position and direction of each part described below are based on the front and the upper side.

  First, the overall configuration of a storage container 1 equipped with a cap 2 which is an example of a lid to which the present invention is applied will be described with reference to FIGS.

  The storage container 1 includes a bottomed cylindrical container body 3 having an opening 3a opened upward, and a cap 2 detachably attached to the opening 3a.

  Of these, the container body 3 has a bottom surface 3b, and a storage part 3d for storing coffee beans ground powder 4 and the like, which is a container that needs to be vented, and a lower end connected to the storage part 3d. In addition, the above-described opening 3a is composed of a lid mounting portion 3c formed at the top.

  The lid mounting portion 3c has a diameter larger than that of the storage portion 3d, and a step portion 3e is formed at a boundary portion between the lid mounting portion 3c and the storage portion 3d.

  Thereby, when the storage part 3d is gripped with one hand and the cap 2 is pushed into the opening 3a of the lid attaching part 3c and attached with the other hand, the container body 3 slides down from one hand and falls. Even if it tries, this level | step-difference part 3e is latched by one hand, and it can stop the further slipping-down of the container main body 3. FIG.

  Furthermore, in the container body 3 of the present embodiment, the lid mounting portion 3c and the storage portion 3d are integrally formed by subjecting a stainless steel plate having a thickness of about 0.5 mm to deep drawing, It is good also as a structure.

  In addition, the material may be other metal such as aluminum, glass, ceramic, synthetic resin, wood, etc., and the structure of the container body 3 as long as it is suitable for storing the contents that generate gas. The material is not particularly limited.

  The cap 2 is fixed so as to be connected to the bottom surface of the gripping portion 7 so as to be attached to the bottom surface of the gripping portion 7 and grips the cap 2 by hand, and closes the opening 3a. And a possible thin plate-like sheet 8.

  Of these, the gripping portion 7 is made of ceramic and, as will be described in detail later, is connected to the lid support portion 5 that is locked to the opening 3a and the lower end of the lid support portion 5. The lid body 6 inserted into the same opening 3a is integrally formed.

  Similarly to the container body 3 described above, the gripping part 7 may have a separate structure for the lid support part 5 and the lid body part 6, and in addition, the material is a metal such as stainless steel or aluminum, glass, synthetic resin, It may be wood or the like, and the structure and material of the gripping part 7 are not particularly limited as long as they are suitable for the storage of the contents that generate gas.

  Further, the sheet 8 is formed of an elastic body such as silicon rubber or chloroprene rubber, and the outer peripheral portion 8a that is the outer periphery of the closing portion is a predetermined overhang amount 9 rather than the inner dimension of the inner wall 3a2 of the opening 3a. Projects outward.

  As a result, when the above-described gripping portion 7 is gripped and the lid main body portion 6 is inserted into the opening 3a, the outer peripheral portion 8a elastically contacts the opening inner wall 3a2, and the opening 8a is closed by the sheet 8 in an airtight state. It can be sealed. For this reason, inflow of air from the outside into the storage container 1 with a simple structure is prevented, and other members such as a conventional screwing structure, processing operations such as threading, sealing materials for ensuring airtightness, and the like Careful screwing operation can be omitted.

Next, the detailed configuration of the cap 2 will be described with reference to FIGS.
As shown in FIG. 2, the cap 2 has a valve structure 10 formed from the lid body portion 6 to the seat 8 in addition to the lid support portion 5, the lid body portion 6, and the seat 8 that constitute the grip portion 7 described above. It has. Below, the structure of each part is explained in full detail.

  As shown in FIGS. 1 to 4, the lid support portion 5 has a short cylindrical shape, and the outer peripheral portion 5 a has a predetermined overhanging amount than the inner dimension of the opening inner wall 3 a 2 of the opening 3 a described above. 16 is projected outward.

  As a result, when the cap 2 is attached to the opening 3a, the lower surface 5a1 of the outer peripheral portion 5a abuts against the upper edge 3a1 of the opening 3a, and the lid support portion 5 cannot be inserted any further, and the lid support portion 5 opens. It will be in the state latched by 3a.

  At this time, the lower surface 5a1 of the outer peripheral portion 5a is pushed upward from the upper end edge 3a1 of the opening 3a by the elastic force of the sheet 8 and is in a separated state. Between the lower surface 5a1 and the upper end edge 3a1, A gap 13 is always formed.

  Furthermore, a concave portion 5 b that opens upward is formed on the upper surface of the lid support portion 5.

  Accordingly, the volume of the lid support portion 5 is reduced to reduce the weight of the cap 2, and the cap 5 is pulled up while being sandwiched between the plurality of fingertips between the concave portion 5b and the lower surface 5a1 of the outer peripheral portion 5a. 2 can be easily removed from the container body 3.

  The lid main body 6 has a short columnar shape smaller in diameter than the lid support 5 described above, and the outer peripheral portion 6a that is the outer periphery of the main body constituting the outer periphery of the lid main body 6 is the opening inner wall 3a2 of the opening 3a. It is formed so as to be inside by a predetermined gap amount 11 from the inner dimension.

  As a result, a communication gap 12 communicating with the outside can be provided between the opening inner wall 3a2 and the outer peripheral portion 6a of the lid main body portion 6, and has flowed out of the container main body 3 via the valve structure 10 described later. The gas can be discharged to the outside from the gap 13 through the communication gap 12. For this reason, it is not necessary to provide a special exhaust path separately, and the number of parts is reduced.

  Furthermore, the vertical position adjustment of the seat 8 can be performed by changing the spacing 14 between the upper edge 3a1 of the opening 3a and the lower surface 5a1 of the lid support 5 and the vertical length 15 of the lid body 6. Can be done. For example, the cap 2 is pulled upward to widen the separation interval 14 or the length 15 of the lid body 6 is shortened to set the sheet 8 closer to the opening 3a. The sheet 8 can be set closer to the contained item by pushing in to reduce the separation interval 14 or by forming the length 15 of the lid body 6 longer.

  Thereby, the storage space in the container main body 3 is expanded by the arrangement of the sheet 8 near the opening 3a to increase the storage amount of the storage object. The space can be reduced to reduce the amount of storage of the stored items, and the contact of the stored items with the intruding air can be suppressed as much as possible.

  In addition, a concave portion 6 b that opens downward is formed on the lower surface of the lid main body portion 6, similarly to the lid support portion 5.

  Thus, the volume of the lid body 6 is reduced to reduce the weight of the cap 2, and a substantially ring-shaped bottom surface 6c is provided on the outer periphery of the recess 6b, and a substantially ring-shaped sheet 8 is adhered to the bottom surface 6c. As a result, when an expensive material such as silicon rubber is used, the usage amount of the sheet 8 is reduced to reduce the component cost.

  The seat 8 is thus substantially ring-shaped, and both the outer peripheral portion 8a and the inner peripheral portion 8b are formed concentrically in a circular shape, but the portion having the above-described valve structure 10 in the inner peripheral portion 8b. Is curved so as to project inward, and the bottom surface 6c of the lid body 6 described above is also curved so as to project inward along the inner peripheral portion 8b in the portion having the valve structure 10. .

  As a result, the inner peripheral portion 8b of the sheet 8 can be attached to the bottom surface 6c of the lid main body portion 6 with a substantially constant width of the allowance 17, and the sheet 8 can be attached to the lid main body portion 6 regardless of the circumferential position. It adheres to the bottom surface 6c with a uniform adhesive force, suppresses local peeling, and increases the peeling strength of the sheet 8.

  Further, a portion of the sheet 8 projecting outward from the bottom surface 6c of the lid main body 6 (hereinafter referred to as “pressure receiving portion”) 8c has a gas pressure in the closed container main body 3 as described later. Act. Here, as described above, the outer peripheral portion 8a of the seat 8 is circular, whereas the inner peripheral portion 8b of the seat 8 and the bottom surface 6c of the lid main body portion 6 are both inward in the portion having the valve structure 10. Curved to overhang.

  For this reason, in the pressure receiving portion 8c, the portion 8c1 having the valve structure 10 (hereinafter referred to as “valve portion”) 8c1 has a valve overhang amount 18a that projects outward from the bottom surface 6c of the lid main body 6 to other portions ( (Hereinafter referred to as “closed portion”) 8c2 is set to be larger than a predetermined sheet protruding amount 18b protruding outward from the bottom surface 6c of the lid main body 6. Note that the sheet overhanging amount 18b is the sum of the above-described overhanging amount 9 of the sheet 8 from the opening inner wall 3a2 and the gap amount 11 from the same opening inner wall 3a2 to the outer peripheral portion 6a of the lid body 6. It is requested from.

  Thereby, in the pressure receiving portion 8c, the area of the valve portion 8c1 can be set larger than that of the surrounding pressure receiving portion 8c to provide an area difference, and the valve portion 8c1 is bent preferentially toward the opening 3a by the gas pressure. A valve structure 10 that opens is formed. Accordingly, the gas venting structure can be formed with a simple configuration, and the conventional complicated structure can be eliminated, so that the number of parts can be reduced and the installation space can be reduced.

  In addition, the end surface of the outer peripheral portion 8a of the sheet 8 is formed in an R shape that is curved upward in a sectional view.

  Thereby, when the cap 2 is attached to the container body 3, the outer peripheral portion 8a of the sheet 8 can be brought into contact with the opening inner wall 3a2 without any gap even if the shape and size of the opening inner wall 3a2 vary greatly in the circumferential direction. Further, the airtightness of the opening 3a by the sheet 8 is further improved.

  As shown in FIGS. 2 to 6, the valve structure 10 includes a valve portion 8c1 of the seat 8 as described above, and a lid body portion 6 that is a space necessary for opening and closing the valve portion 8c1. And a valve receiving portion 6e formed with a movable recess 6d.

  Of these, the valve portion 8c1 is set to have a larger area than the surrounding closed portion 8c2 as described above. As shown in FIGS. 2, 5, and 6, the opening portion wall 3a2 of the container body 3 is elastically formed. A first bent region 19 including an outer peripheral portion 8a to be in contact and a first bent region 19 inside the first bent region 19 and bent toward the opening 3a centering on a connection boundary line 8d with the lid main body 6 when receiving pressure. 2 bent regions 20. In addition, the connection boundary line 8d of a present Example is formed in the U shape opened ahead by planar view.

  When the cap 2 is mounted on the container body 3, the first bent region 19 is bent upward in conjunction with the upward bending of the surrounding closed portion 8c2, as shown in FIGS.

  Thus, when the cap 2 is mounted, the closing portion 8c2 and the first bent region 19 of the valve portion 8c1 cooperate to elastically contact the opening inner wall 3a2, and the opening 3a can be reliably closed.

  When gas is generated from the container after the cap 2 is attached, the second bent region 20 is further upwardly centered on the connection boundary line 8d as shown in FIG. 6 because gas pressure acts on the entire lower surface of the valve portion 8c1. To be bent. Then, a discharge gap 21 is formed between the valve portion 8c1 and the opening inner wall 3a2, and the gas generated from the contained material directly passes from the discharge gap 21 to the outside through the gap 13 as shown by an arrow 22. It is discharged, or after flowing from the discharge gap 21 into the communication gap 12 of the closed portion 8c2 on the left and right sides of the valve portion 8c1, it is discharged from the communication gap 12 through the gap 13 to the outside.

  Thereby, a plurality of gas discharge paths can be provided, and the gas discharge amount can be increased. In addition, using a larger area than the surrounding closed portion 8c2, the valve portion 8c1 that is a single valve member is provided with an opening sealing function by bending the first bent region 19, and the subsequent second bent region 20 A plurality of functions such as a gas venting function by bending can be provided.

  In the valve receiving portion 6e, the outer peripheral portion 6a of the short cylindrical lid main body portion 6 in which the upper surface of the sheet 8 which is a sheet-like elastic closing portion is fixed to the bottom surface 6c at one end is recessed radially inward as described above. The valve movable recess 6d is formed.

  As shown in FIGS. 2, 3, and 5, the valve receiving portion 6e is formed with the lower end at the portion contacting the U-shaped connecting boundary line 8d as described above and gradually reducing the circumferential width. After extending to the end of the lid main body 6 on the side of the lid support portion 5 so as to project obliquely upward, it is formed by connecting to the lower surface 5a1 of the lid support portion 5 as it is.

  Thus, as described above, when the valve portion 8c1 is further bent upward due to the gas pressure acting on the entire lower surface, the valve portion 8c1 is accommodated in the valve movable recess 6d, so that the valve portion 8c1 is positioned on the opening 3a side. And a large valve opening can be obtained.

  For this reason, when the seat 8 is inserted in an airtight state when the cap 2 is attached, the internal air of the container body 3 can be discharged in a short time to enable smooth attachment, and even when the gas release from the contents is significant, Gas can be discharged quickly.

  Further, as in the present embodiment, as described above, the outer peripheral portion 6a of the lid main body portion 6 is recessed inward in the radial direction to form the valve movable recess 6d of the valve receiving portion 6e, so that the upper surface of the seat 8 is greatly exposed. When the valve portion 8c1 is provided from the exposed portion 8e to the outer peripheral portion 8a, both the valve receiving portion 6e and the valve portion 8c1 can use a part of the cap 2.

  Thereby, while forming the valve structure 10, this valve structure 10 can be integrated in the cap 2 integrally.

  In addition, when the gas pressure in the container body 3 acts on the valve portion 8c1, and the second bent region 20 of the valve portion 8c1 is bent further upward about the connection boundary line 8d as described above, FIG. As shown, a space (hereinafter referred to as “bag space”) 23 is formed between the valve receiving portion 6e and the valve portion 8c1.

  At this time, if the outer peripheral portion 8a of the valve portion 8c1 is pressed against the inner wall of the valve receiving portion 6e without a gap, the bag space 23 becomes airtight, and the compression resistance of the air inside the bag space 23 causes that of the valve portion 8c1. The above bending to the opening 3a side is suppressed.

  Therefore, at least a part of the bag space 23 is provided with an air vent structure for discharging the air in the bag space 23 to the outside. In this embodiment, an air vent gap 24 is formed between the valve receiving portion 6e and the valve portion 8c1 when the bag space 23 is formed.

  Thereby, the air in the bag space 23 is smoothly discharged to the outside through the air vent gap 24 from the gap 13, and the bending of the valve portion 8c1 toward the opening 3a is hindered by the compression resistance of the air in the bag space 23. Therefore, a large valve opening can be easily obtained. In addition, as described above, by discharging the air in the bag space 23 by using the valve receiving portion 6e and the valve portion 8c1 of the cap 2, even the air vent structure can be integrated into the cap 2.

Next, various types of the cap 2 will be described with reference to FIGS. 3, 5, 7, and 8.
As shown in FIGS. 5 and 7A, the cap 2A has a bending rigidity of the valve portion by making the thickness of the valve portion 8c1 of the seat 8 of the cap 2 smaller than the thickness of the surrounding pressure receiving portion. Is made smaller.

  In this cap 2A, the thickness of the valve portion 8A1 in the seat 8A is 25 and is set smaller than the thickness 26 of the surrounding pressure receiving portion 8A2, and the valve portion 8A1 has a gas pressure smaller than that of the valve portion 8c1 described above. Can be easily bent and opened.

  As shown in FIGS. 5 and 7 (b), the cap 2B is formed by changing the valve portion 8c1 of the seat 8 of the cap 2 described above to another material having a larger elastic deformability than the surroundings. The bending rigidity is reduced.

  In this cap 2B, the valve portion 8B1 in the seat 8B is made of soft silicone rubber mixed with soft silicone rubber, for example, in the case of silicon rubber, and has a bending rigidity smaller than that of the surrounding pressure receiving portion 8B2, thereby allowing The portion 8B1 can be bent and opened easily with a smaller gas pressure than the valve portion 8c1 described above.

  As described above, the bending rigidity of the valve portions 8A1 and 8B1 itself can be set low in addition to the area difference of the pressure receiving portion where the gas pressure acts, and the operation sensitivity of the valve portion with respect to the gas pressure in the storage container 1 can be set. Can be increased.

  Further, as shown in FIGS. 3 and 8, the cap 2 </ b> C has a notch portion 5 </ b> A <b> 1 that is recessed radially inward at the outer peripheral portion 5 a of the lid support portion 5 of the cap 2 described above at a pitch of 90 degrees. This is an increase in the amount of gas discharged from the containment.

  When such a cap 2C is attached to the container body 3, the gas flowing out from the container body 3 through the discharge gap 21 and the communication gap 12 is discharged to the outside from the notch 5A1 in addition to the gap 13 described above. Can be made.

  Thereby, by adjusting the position, cross-sectional area, etc. of the cutout portion 5A1, a gas discharge path suitable for the type and amount of gas generated from the accommodation is provided, and an excellent gas venting function is imparted to the cap 2C. Can do.

  As described above, the lid to which the present invention is applied has a simple and compact structure, and can reliably prevent the inflow of air from the outside into the storage container and vent the gas from the storage container. It has become.

3 Container body 3a Opening 3a2 Opening inner wall 4 Ground beans (container)
5 Lid support part 6 Lid body part 6a Outer part (outer part of the body part)
6d Valve movable recess 6e Valve receiving part 8 Seat (elastic closing part)
8a Outer peripheral part (outer peripheral part outer periphery)
8c Pressure receiving part 8c1 Valve part 8d Connection boundary line 8e Exposed part 10 Valve structure 12 Communication gap 19 First bent area 20 Second bent area 23 Bag space 24 Air vent gap

Claims (6)

A lid support portion that is locked to the opening of the container body for storing the contents that need to be degassed;
A lid body portion that is continuous with the lid support portion and that is inserted into the opening and forms a communication gap communicating with the outside between the opening inner wall and the opening;
An elastic closing portion that is continuous with the lid main body portion, and that has an outer periphery of the closing portion that protrudes outward by a predetermined amount from the inner dimension of the opening inner wall in a plan view and elastically contacts the opening inner wall to close the opening; ,
A valve structure in which a predetermined pressure receiving portion is bent and opened preferentially to the opening side due to an area difference of the pressure receiving portion on which the gas pressure in the container body in the closed state is closed by the elastic closing portion;
The valve structure is
In the elastic closing part, the valve part having a larger area than the surroundings in the pressure receiving part,
A lid body having a valve receiving portion formed in the lid main body portion and formed with a valve movable recess, which is a space necessary for opening and closing the valve portion; The valve portion is
A first bent region including an outer periphery of a closing portion that elastically contacts the inner wall of the opening;
The lid according to claim 1, further comprising: a second bent region that is inside the first bent region and bends toward an opening centering on a connection boundary line with the lid main body when receiving pressure. The valve movable recess of the valve receiving portion is:
In the columnar lid main body portion fixed to one end of the elastic blocking portion formed in a sheet shape, formed by denting the outer periphery of the main body portion of the lid main body portion in the radial direction,
The valve portion is
The lid according to claim 1, wherein the lid is formed from an exposed portion of the elastic closing portion exposed by forming the valve movable recess to an outer periphery of the closing portion. The valve structure is
The lid according to claim 3, further comprising an air vent structure for discharging air in the bag space to the outside from a bag space sandwiched between the valve receiving portion and the valve portion when pressure is received. The air vent structure is
The lid according to claim 4, further comprising an air vent gap formed between the valve receiving portion and the valve portion during pressure reception. The valve portion is
The lid according to claim 1, comprising at least one of a thin-walled structure that is thinner than the surrounding elastic blocking portion and a composite structure that has a larger elastic deformability than the surrounding elastic closing portion.

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