JP5965580B2 - Container mouth seal structure - Google Patents

Description

  The present invention relates to a seal structure for a container mouth. More specifically, the present invention relates to a sealing structure of a container mouth portion suitable for a container that is sealed in a pressurized state, such as an aerosol container.

  The mouth of the container body is usually sealed by interposing an annular seal packing between the upper surface of the container body and the inner bottom surface or flange of the lid, and clamping between the two. For example, in Patent Document 1, a sealing member such as an O-ring is interposed between a bead portion provided at an opening end of a metal container body and a covering portion of a mounting cup that covers the bead portion, and the mounting cup is clinched. Thus, a seal structure that is attached to the container body is disclosed. This has the advantage that a predetermined sealing pressure can be maintained regardless of changes in internal pressure.

  Further, in FIG. 6 of Patent Document 1 and the like, a synthetic resin cap is inserted into an opening of a metal container body that does not have a bead portion, and a metal cover (mounting cap) is put around the cap. A fixing seal structure is disclosed. In this case, when a sealing material is attached to the annular groove formed on the outer periphery of the cap and the opening is closed with the cap, the sealing cup is pressed against the step formed on the inner surface of the container body to crimp the mounting cup. The sealing material is compressed up and down to be sealed.

  On the other hand, in Patent Document 2, when a screw-tight cap is attached to the mouth of a metal or synthetic resin container body, a sealant is interposed between the mouth and the cap, and the cap is screwed A screw tightening type valve mounting structure for sandwiching a sealing material up and down is disclosed.

Japanese Patent Laid-Open No. 2003-20082 JP 2000-281158 A

  The combination of the mouth part of the metal container body having the above-mentioned bead part and the metal mounting cap that is clinched to it provides a stable sealing function over a long period of time. Cannot be used if used. In addition, the seal structure using a cap made of synthetic resin and a metal cover can be used for relatively small containers, but it is difficult to obtain a uniform sealing pressure in the case of an aerosol container with a large diameter, which makes mass production difficult. Have difficulty. In addition, it is difficult to rotate and attach the cap while protecting the sealing material, and it is difficult to mass-produce the screw-tightening type product.

  The present invention provides a sealing structure for a container mouth portion that can obtain a uniform sealing pressure even when a container body having a relatively large diameter is used, can be applied to a cover cap that covers the outer periphery, and is easily mass-produced. It is a technical issue to do.

A container mouth seal structure according to the present invention (Claim 1) includes a mouth opening at the upper end of a container body, a lid for closing the mouth, and a sealing member interposed therebetween. The sealing structure of the mouth part, the inner peripheral surface of the mouth part is a smooth cylindrical shape, the cover body includes a peripheral wall fitted into the mouth part, the outer peripheral surface of the peripheral wall of the lid body An annular seal groove for holding the seal member is formed, and the seal member is interposed between the bottom surface of the seal groove on the peripheral wall of the lid and the inner peripheral surface of the mouth of the container body, and is arranged in the radial direction. It is a ring-shaped member that is elastically deformed when pressurized, and further includes a cover member for fixing the lid to the upper end of the container body, and a locking step is provided on the outer periphery of the container body. The lower edge of the cover member is caulked to the locking step. The lid is a bulb holder for holding the aerosol valve is characterized in that the container body is a pressure vessel.

In such a container mouth portion sealing structure, it is preferable that the lid body includes an annular contact portion that contacts the upper end surface of the container body. In that case, a groove through which gas passes can be formed in the upper end surface of the container main body or the contact portion of the lid corresponding thereto .

Also in addition the said one of the seal structure, the vertical dimension of the front Symbol seal groove, preferably greater than the vertical dimension of the sealing member which is compressed and deformed in the radial direction (claim 4).

Further, it is preferable that the peripheral wall of the lid body is provided with a seal part for compressing the seal member in the radial direction and a seal release part having a smaller diameter than the seal part provided below the seal part ( Claim 5 ). In that case, it is preferable that the bottom surface of the seal groove on the peripheral wall of the lid body has a taper shape with a gradually decreasing diameter from the seal portion to the seal release portion (Claim 6 ).

Also in the sealing structure of the previous SL any container opening, above the inner circumferential surface of the mouth portion, the step portion cut away to release the formed seal member may be provided so as to diameter (aspect 7 ).
Wherein also in the seal structure of any container opening, said container body may be a bottle made of synthetic resin (claim 8). In this case, the container main body has a cylindrical neck portion formed with a flange projecting outward on the outer periphery of the upper end, the inside of the neck portion is a mouth portion, and the lower surface of the flange is a locking step. It has become part, that the sealing groove of the peripheral wall of the said lid body is provided at a position corresponding to the lower surface of the flange is preferably (claim 9).
Also in the sealing structure of the any of the container mouth portion, the container body may be a metal can (claim 10).

The container mouth seal structure according to the present invention (Claim 1) presses the seal member between the inner peripheral surface of the mouth portion and the bottom surface of the seal groove of the peripheral wall of the lid body and presses the seal member radially. Press. The sealing material can be elastically deformed by the applied pressure, and the sealing pressure can be obtained by the restoring force. Therefore, the sealing pressure is independent of the force that presses the lid against the mouth, and provides a stable sealing function over a long period of time. Moreover, various sealing functions can be brought about by devising the shape of the bottom face of the sealing groove on the peripheral wall that supports the sealing member. Further, high sealing performance can be obtained regardless of the size of the container mouth. Further, since the sealing member is held by the annular sealing groove on the peripheral wall of the lid body, the sealing member is unlikely to fall off the lid body when the lid body is transported or when gas is filled.
Further, a locking step is provided on the outer periphery of the container mouth, and the lower end periphery of the cover member is caulked to the locking step, so that the cover member can be securely fixed, Gas filling can be easily performed using the apparatus.
Furthermore, since the lid is a valve holder for holding an aerosol valve and the container body is a pressure-resistant container, an aerosol container having a large diameter and an excellent sealing function can be obtained.

  When the lid includes a contact portion that contacts the upper end surface of the container main body (Claim 2), the vertical positional relationship between the lid and the container mouth is determined. In this state, the lid can be reliably fixed to the container body by the cover member. Even in that case, a desired sealing pressure can be obtained as described above.

  When a groove through which gas passes is formed in the upper end surface of the container main body or the contact portion of the lid body that abuts on the container body (Claim 3), even after the lid body is fixed, the gap between the lid body and the mouth portion The propellant can be filled from the gap. Further, even when the internal pressure rises abnormally due to exposure to a high temperature environment, etc., gas escapes from the groove, so that it is safe to prevent the lid body from falling off and the container body from bursting.

When the vertical dimension of the seal groove is larger than the vertical dimension of the seal member compressed and deformed in the radial direction (Claim 4 ), the seal member can move within the range of the annular groove. Therefore, after the lid is fixed with the cover member, the gas is filled easily because the seal member moves or elastically deforms when filling the gas.

When the bottom surface of the seal groove on the peripheral wall of the lid body is provided with a seal portion for compressing the seal member in the radial direction and a seal release portion having a smaller diameter than the seal portion provided below the seal portion (Claim 5 ) When the gas is charged after the lid is fixed with the cover member, the seal member moves to the seal release portion. As a result, the sealing pressure is reduced and gas filling is smooth. When the gas filling is finished, the sealing member rises again to the sealing portion by the internal pressure, and the sealing function is exhibited. That is, the seal member, the seal part, and the seal release part as a whole have a simple check valve function.

When the bottom surface of the seal groove on the peripheral wall of the lid body has a tapered shape that gradually decreases in diameter from the seal portion to the seal release portion (Claim 6 ), the state is changed from the seal state to the seal release state. The transition and the transition from the seal release state to the seal state are smooth.

Above the inner circumferential surface of the front Symbol mouth, if stepped portions cut away to release the formed seal member to diameter is provided (claim 7), the ambient temperature rises abnormally high temperature When the internal pressure becomes abnormally high, the seal member is pushed out from the inner peripheral surface of the mouth portion to the cutout portion by the internal pressure, the seal is released, and the lid body can be prevented from coming off from the container.

When the container body is a synthetic resin bottle (Claim 8 ), it is relatively easy to increase the rigidity by increasing the thickness of the opening compared to other parts. Therefore, the sealing function can be improved, and the cover member can be firmly attached with high strength. Furthermore, when forming a latching step part, it can be set as a latching step part with a large level | step difference, and a cover member can be fixed still more reliably.
The container body is a bottle made of synthetic resin, the container body has a cylindrical neck part formed with a flange projecting outward on the outer periphery of the upper end, and the inside of the neck part is a mouth part When the lower surface of the flange is a locking step and the sealing groove on the peripheral wall of the lid is provided at a position corresponding to the lower surface of the flange (Claim 9 ), the sealing material is the meat of the container. Since it is provided at a position where the thickness is reduced (a position corresponding to the lower part of the flange), when the environmental temperature rises to an abnormally high temperature and the internal pressure becomes abnormally high, the container is deformed at the position where the sealing material is in contact. In addition, the radial pressure applied to the seal material is weakened, the seal is released, and the cover body can be prevented from coming off.

When the container body is a metal can (Claim 10 ), it is possible to obtain the same pressure resistance with a thin wall thickness as compared with a synthetic resin bottle, so the outer diameter of the mouth portion is reduced. be able to. Thereby, components, such as a cover member, can be made small.

It is principal part sectional drawing which shows one Embodiment of the aerosol container provided with the seal structure of this invention. It is an expanded sectional view which shows the seal structure in FIG. It is a principal part perspective view which shows an example of the pouch of the aerosol container of FIG. 4a and 4b are a plan view and a partial cross-sectional side view, respectively, of a valve holder used in the seal structure of FIG. 5a and 5b are a plan view and a partial cross-sectional side view, respectively, of a cover member used in the seal structure of FIG. It is principal part sectional drawing which shows other embodiment of the aerosol container provided with the seal structure of this invention. It is an expanded sectional view which shows the seal structure in FIG. FIG. 8A is a cross-sectional view showing still another embodiment of the seal structure of the present invention, and FIG. 8B is a cross-sectional view showing a seal release state of the seal structure. It is sectional drawing which shows other embodiment of the seal structure of this invention. It is principal part sectional drawing which shows other embodiment of the aerosol container provided with the seal structure of this invention. It is principal part sectional drawing which shows other embodiment of the aerosol container provided with the seal structure of this invention. It is principal part sectional drawing which shows other embodiment of the aerosol container provided with the seal structure of this invention. It is principal part sectional drawing which shows other embodiment of the aerosol container provided with the seal structure of this invention.

  FIG. 1 shows an embodiment in which the seal structure of the present invention is applied to a two-liquid discharge type double aerosol container. The aerosol container 10 includes a container main body 11, a valve holder 13 for closing an upper end opening (hereinafter referred to as a mouth) 12 of the container main body, and two aerosol valves (hereinafter simply referred to as valves) mounted on the valve holder. 14 and 15 and a cover member 16 for fixing the valve holder 13 together with the valves 14 and 15 around the mouth portion 12. Pouches 17 and 18 filled with the stock solution are attached to the respective valves 14 and 15 in a lifted state. The space between the valve holder 13 and the container body 11 is sealed with a seal structure 20.

  The container body 11 includes a bottomed cylindrical body 21, a shoulder 22 provided at the upper end of the body, a cylindrical neck 23 extending upward from the shoulder, and a flange 24 provided on the outer periphery of the upper end of the neck. It is a synthetic resin integral molded product, and is a synthetic resin bottle with pressure resistance. The neck portion 23 is thicker than the body portion 21. The mouth portion 12 which is the inside of the neck portion 23 has a relatively large inner diameter so that the two pouches 17 and 18 can pass therethrough. The inner surface of the mouth portion 12 has a smooth cylindrical shape, and reaches the upper end straight as it is, that is, without a stepped portion.

As shown in FIG. 2, the upper end surface 25 of the neck part 23 is made flat, and the outer peripheral surface of the flange 24 is cylindrical. The lower surface of the flange 24 is a locking step portion 26, and the locking step portion has an inclined surface (tapered surface) that falls inward. However, it may be horizontal (see FIG. 6), or may be a reverse inclined surface that rises as it enters the inside. In this embodiment, the container body 11 is made of, for example, polyethylene terephthalate (PET), polybutylene terephthalate (
A synthetic resin having high strength and rigidity such as PBT), nylon (NY), and polypropylene (PP), and is manufactured by biaxial stretch blow molding or the like.

  The valve holder 13 is generally composed of a thick disk-shaped top plate 27 and a cylindrical peripheral wall (fitting portion) 28 extending downward from the periphery of the top plate (FIGS. 4a and 4b). reference). An O-ring groove 31 for mounting the O-ring 30 is formed on the outer peripheral surface of the peripheral wall 28. The O-ring 30 is a seal member in the present invention, and constitutes the seal structure 20 together with the O-ring groove (seal groove) 31, the mouth portion 12, the flange 24, the locking step portion 26, the cover member 16, and the like. The valve holder 13 is preferably formed of a synthetic resin. Thereby, even a complicated shape can be manufactured at low cost. However, it can also be comprised from other materials, such as a metal.

As shown in FIGS. 4 a and 4 b, a pair of left and right cylindrical recesses 32 for mounting the valves 14 and 15 are formed on the top surface of the top plate 27 of the valve holder 13. And the opening 34 for letting the lower part of valve | bulb 14, 15 pass to the inside of a container is formed in the bottom plate 33 of each recess concentric with a recess. The peripheral edge of the opening 34 in the bottom plate 33 is an engaging step portion 36 that engages with the step portion 35 of the valves 14 and 15. A sealing material may be provided on the step portion 35 of the valves 14 and 15 so as to abut the engagement step portion 36 to have a sealing function. A step is provided between the inner peripheral surface of the opening 34 and the inner peripheral surface of the peripheral wall 28. Although it can be flush, as shown in FIG. 4a, it is just flush with one point and not flush with other parts.

  In this embodiment, a step portion 38 for mounting a sealing material such as an O-ring for a valve (see reference numeral 37 in FIG. 2) is formed at a portion surrounding the opening 34 on the upper surface of the bottom plate 33. The O-ring 37 seals between the valves 14 and 15 and the valve holder 13, and may be clamped up and down, may be clamped in the radial direction, or may be clamped both. On the other hand, the part of the lower surface of the top plate 27 that is outside the peripheral wall 28 is a contact portion 40 that contacts the upper end surface 25 of the neck portion of the container body 11. In this embodiment, the contact portion 40 is extended outward in the radial direction, and a flange or a step portion 41 that protrudes somewhat from the outer periphery of the top plate 27 is formed. The outer diameter of the step 41 is the same as the outer diameter of the flange 24 of the container body 11. The step portion 41 acts as an engaging portion when the cover member 16 is caulked near the mouth portion of the container body.

  Returning to FIG. 1, the valves 14 and 15 include a substantially cylindrical housing 42, a stem 43 accommodated in the housing so as to be movable up and down, a spring that constantly biases the stem upward, It is a conventionally well-known thing provided with the stem rubber which opens and closes the said stem hole provided in an upper end. Further, in this embodiment, a holding cover 44 for holding the stem rubber and the stem 43 in the housing against the urging force of the spring is provided.

  The holding cover 44 is formed by pressing a plastic thin metal plate such as tinplate, aluminum, or stainless steel into a bottomed cylindrical shape, and has an opening through which the stem 43 passes in the center of the top surface. In this embodiment, a small aerosol container used as a cover member that is crimped around the container body is used as it is. The two valves 14 and 15 may have different internal structures and external shapes. Further, the holding cover 44 can be omitted. In that case, the gasket or stem 43 is held in the housing 42 by the cover member 16.

  As shown in FIGS. 5 a and 5 b, the cover member 16 is formed in a bottomed cylindrical shape including an upper plate 45 and a side wall 46 around the upper plate 45. Two openings 47 through which the stem 43 passes are formed in the upper plate 45. When the shapes of the two valves 14 and 15 are different, the diameters and shapes of the openings 47 may be different. The cover member 16 can be manufactured from a thin metal plate by press molding. However, it can also be molded from a synthetic resin. In the middle of the side wall 46, an engagement step 46 a that engages with the step 41 on the outer periphery of the valve holder 13 is formed. And the lower end vicinity 46b of the side wall 46 is a cylindrical shape as shown in FIG. 5b and extends straight down before assembling. As shown in FIG. 26 is tightened. The caulking process is performed by, for example, bending inward with a crimp nail or bending it tightly with roll forming.

  As shown in FIGS. 1 and 3, each of the pouches 17 and 18 includes a pouch body 48 formed by joining the peripheral edges of two sheets into a bag shape, and a cylindrical connecting member 49 attached to the upper end thereof. ing. The sheet constituting the pouch body 48 is preferably a laminate sheet made of a base material having a high gas barrier property, particularly a metal foil such as an aluminum foil, and a thermoplastic resin film that protects the metal foil and imparts thermal adhesiveness. Note that the pouch may use a sheet made of a light-transmitting thermoplastic resin film so that the state of the contents such as color and remaining amount can be visually confirmed. The pouches 17 and 18 have flexibility, and the stock solution filled in the pouches 17 and 18 is discharged to the outside by the pressure of the injection gas filled in the space between the container body 11 and the pouches 17 and 18. The thermoplastic resin film is closely joined to both surfaces of the metal foil, and the inner surfaces of the two sheets are thermally bonded to each other at the peripheral edge 50. A pouch formed from a laminate sheet containing a metal foil does not transmit even when the volatile components of the stock solution are gasified. Depending on the type of undiluted solution, an inner bag made of a synthetic resin not provided with a metal foil, particularly an inner bag formed by blow molding or the like may be employed.

  The connecting member 49 has a cylindrical portion 52 that fits into a cylindrical projection 51 that protrudes from the lower portion of the valve housing 42, and a boat-shaped or rhombus-shaped joint portion 53 that is provided at the lower end thereof. The joint portion 53 is provided so as to smoothly transition from the peripheral edge 50 where the sheets of the pouch main body 48 are bonded to the joint portion with the connecting member 49. Thereby, the joining strength between the connecting member 49 and the pouch body 48 is increased. The joint may be cylindrical or elliptical.

  In the aerosol container 10 configured as described above, two pouches 17 and 18 are filled with different agents, for example, a first dyeing agent and a second dyeing agent, and the pouches 17 and 18 are placed in the container body 11. Filling with propellant such as compressed gas such as nitrogen gas, carbon dioxide gas and compressed air for pressurization, and liquefied gas such as liquefied petroleum gas, dimethyl ether and hydrofluoroolefin, it becomes a two-liquid discharge type aerosol product . This is used by attaching a push button 55 with a spout 54 common to the two stems 43, as indicated by an imaginary line in FIG. When the push button 55 is pushed down, the stem holes of both valves 14 and 15 are opened, and two liquids are simultaneously discharged from the mouth portion of the spout 54. In the case where a partition plate for partitioning both flow paths is provided in the spout 54, the contents can be separated until they come out because two independent valves 14 and 15 are used. . However, it is also possible to mix in a spout by not providing a partition plate.

  When filling the pouches 17 and 18 with the undiluted solution, the filling members 49 are usually filled before the valves 14 and 15 are attached, and then the valves 14 and 15 are attached to the connecting members 49. However, after being attached to the valves 14 and 15, the stock solution can be filled through the valves. The propellant is filled by attaching the cover member 16 to the upper end of the neck portion 23, slightly lifting the cover member 16 and the valve holder 12 before tightening, and filling from the gap between the upper end surface of the neck portion of the container body 11 and then tightening. A so-called undercup filling method can also be employed. Further, after crimping the cover member 16, as in the case of filling the under cup, apply an annular seal member (see reference numerals 72 and 73 in FIG. 7) to the upper surface of the cover member 16 and the shoulder portion 22 of the container body 11. It can also be filled through the gap between the container body 11 and the valve holder 13 by supplying a pressurized propellant in contact therewith. In that case, the O-ring 31 between the container main body 11 and the valve holder 13 is elastically deformed or moved to a position where the sealing function is lowered to lower the sealing pressure.

  Once filled, the shape and position of the O-ring 30 return to its original shape due to the pressure in the container body, and the O-ring 30 that is sandwiched in the radial direction between the inner surface of the neck 23 and the outer surface of the peripheral wall 28 stabilizes for a long period of time. Sealing function is obtained. Furthermore, even if the internal pressure rises due to an increase in the external temperature and the valve holder 13 and the cover member 16 are deformed or pushed up somewhat, the sealing function is hardly affected. Further, the designed seal pressure can be obtained even when the mounting position and the mounting force of the cover member 16 vary.

  Furthermore, since the valve holder 13 includes the contact portion 40, the valve holder 13 can be stably fixed to the upper end of the neck. Moreover, since the synthetic resin bottle is used as the container body 11, it is relatively easy to increase the rigidity by making the neck portion 23 thicker than other portions. Therefore, the function of the seal structure 20 can be improved, and the cover member 16 can be firmly attached with high strength. In addition, a check valve for gas filling can be provided separately in the valve holder 13, and gas can be filled from the check valve for gas filling.

The aerosol container 60 of FIG. 6 is characterized in that one pouch 62 having a partition 61 provided therein is employed, and the other is substantially the same as the aerosol container 10 of FIG. That is, in the aerosol container 10 of FIG. 1, the pouches 17 and 18 are suspended from the valves 14 and 15, respectively. However, the pouch 62 of the aerosol container 60 shown in FIG. 50), and the inside is partitioned into two compartments 63 and 64 by a partition 61. The compartments 63 and 64 and the valves 14 and 15 are connected by one connecting member 65.

  The connecting member 65 is formed with a fitting hole 66 and a communication hole 67 which are closely fitted to the cylindrical protrusions 51 of the valves 14 and 15. Further, a step is provided on the lower surface of the connecting member 65, and the vicinity of the upper end of the partition 61 is adhered to a vertical surface 68 formed between the steps. Thereby, the partition 61 and the connection member 65 can be more reliably sealed.

  In the seal structure 70 shown in FIG. 7, a groove 71 through which gas passes is formed in the contact portion 40 of the valve holder 13. The grooves 71 only need to communicate between the inside and the outside. Usually, about 1 to 4 grooves 71 are provided radially or radially. Even if the valve holder 13 and the container main body 11 are firmly fixed by the groove 71, a gas passage is secured, and gas can be smoothly filled even after the cover member 16 is crimped. Reference numerals 72 and 73 in FIG. 7 indicate seal points of the filling device at the time of gas filling. The groove 71 through which the gas passes can also have a function of releasing the gas and preventing rupture and lid jump when the aerosol product is exposed to an abnormally high temperature. The groove through which gas passes may be formed in the upper end surface 25 of the neck portion of the container body 11, or may be provided in both the upper end surface of the neck portion and the contact portion 40 of the valve holder 13. Moreover, you may provide the groove | channel extended in the vertical direction in the outer peripheral surface of a flange part.

  Further, in the seal structure 70 shown in FIG. 7, a taper-shaped one that is long in the vertical direction and inclined so that the outer diameter of the groove bottom surface decreases as it goes downward is used as the O-ring groove 74 in the peripheral wall 28 of the valve holder 13. ing. Accordingly, when the O-ring 30 is upward (seal part), the seal is reliable, and when gas is filled, the seal is shifted downward (seal release part) as indicated by an imaginary line. The seal pressure with the inner surface of 12 is reduced, and a gap is likely to occur. Thereby, gas filling becomes smooth. After filling, the O-ring 30 moves upward due to the internal pressure, and the sealing pressure increases. The vertically long O-ring groove 74 is preferably used together with the groove 71 through which the gas passes. However, the groove 71 through which gas passes and the vertically tapered O-ring groove 74 can be employed independently.

  The O-ring groove 74 has a taper shape with a smaller diameter as the bottom surface of the groove goes downward, but is formed in two stages so that the diameter is larger at the upper side (seal part) and smaller at the lower side (seal release part). May be. However, the step boundary is smoothed so that the O-ring 30 moves smoothly. The O-ring grooves 31 and 74 are not formed on the peripheral wall 28 of the valve holder 13 but may be a simple taper surface. However, it is preferable to provide an annular protrusion or step on the lower outer peripheral surface of the peripheral wall 28 so that the O-ring 30 is not easily dropped. Instead of or providing the O-ring grooves 31 and 74 in the valve holder 13, an O-ring groove can be formed on the inner surface of the opening 12. In this case as well, the O-ring 30 is compressed in the radial direction and elastically deformed to exhibit a sealing action. Further, when an O-ring groove is provided on the inner surface of the opening 12, it is preferably tapered or stepped so that the upper portion (seal portion) has a small diameter and the lower portion (seal release portion) has a large diameter.

  In the seal structure 70 of FIG. 7, a groove 75 through which gas passes is formed at the boundary between the neck 23 and the flange 24 of the container body 11. A plurality of the grooves 75 are provided in the vertical direction around the neck portion 23. However, it may be an annular groove. You may form the vertical groove which lets gas pass in the outer peripheral surface of the flange 24 of the upper end of the neck part 23. FIG. In the embodiment of FIG. 7, the vicinity 46 b of the lower end of the cover member 16 is not along the locking step portion 26 on the lower surface of the flange 24, but is bent and tightened at a substantially right angle. This creates a gap between the locking step 26 and the vicinity of the lower end of the cover member, which facilitates gas filling and ensures that the gas is discharged when the container body is deformed by heat and internal pressure. Yes.

  8A and 8B is provided with a notch step portion 77 for releasing the O-ring 30 as a seal release portion on the inner surface of the upper end of the neck portion 23. Furthermore, in this embodiment, a vertical groove 78 for allowing gas to escape is formed in the peripheral wall 28 of the valve holder 13. In a normal state, the seal structure 76 has a cylindrical shape in which the neck portion 23 is substantially straight as shown in FIG. 8 a, and the O-ring 30 is in the O-ring groove 31. When the environmental temperature becomes abnormally high and the container body 11 made of synthetic resin is deformed as shown by the arrow P in FIG. 8b and expands downward, the O-ring 30 is restored to the original O-ring by the increased internal pressure. It is pushed out of the groove 31 and moves into the notch step 77. At that time, the vertical groove 78 communicates the upper and lower sides between the inner peripheral surface of the O-ring 30 and the surface of the peripheral wall 28. Therefore, the gas inside the container main body 11 passes through the vertical groove 78 and is further discharged to the outside through the radial groove 71, and the cover body such as the valve holder 13 and the cover member 16 is prevented from coming off. .

  The seal structure 79 shown in FIG. 9 is provided at a position where the O-ring groove 31 corresponds to the position where the thickness of the container body 11 becomes thin, that is, the lower portion of the flange 24. The other points are the same as the seal structure of FIG. 2 or FIG. In this case, when the synthetic resin container body 11 is deformed as indicated by an imaginary line at an abnormally high temperature, the radial pressure applied to the O-ring 30 becomes weak, the seal is released, and the gas escapes. As a result, the valve holder 13 and the like are prevented from coming off.

  The aerosol container 80 shown in FIG. 10 is substantially the same as the aerosol container 10 of FIG. 1 except that there is one valve 14 and no inner bag such as a pouch. Since the aerosol container 80 does not include a pouch, the inside is filled with a propellant and a stock solution in a mixed state. Since no pouch is provided, a dip tube 81 is connected to the lower end of the valve 14. Do not use dip tubes in aerosol containers that are dispensed upside down.

  In addition to the peripheral wall 28, the valve holder 13 of the aerosol container 80 is provided with a cylindrical valve holding portion 82 for holding the valve 14, and a rib 83 is provided radially between them. The cover member 16 can be the same as that shown in FIG. The valve 14 may be fixed by the valve holder 13 without a holding cover (see reference numeral 44 in FIG. 1) for attaching a gasket or stem to the housing.

  The aerosol container 84 shown in FIG. 11 is substantially the same as the aerosol container 80 of FIG. 7 except that the cover member 16 is divided into a disk-shaped top plate 85 and a ring-shaped peripheral portion 86. The peripheral portion 86 is fixed by tightening the lower end and the upper end after enclosing the periphery of the flange 24 and the valve holder 13 with a cylindrical member. In the aerosol containers 80 and 84 of FIGS. 10 and 11, a double aerosol container can be formed by providing an inner bag such as one pouch on the valve 14 (see the pouch 17 of FIG. 1). In addition, in the aerosol containers 80 and 84 having such a single valve, in addition to the seal structure 20 of FIG. 2, various seal structures 70, 76 and 79 such as FIGS. Can do.

  The aerosol container 88 shown in FIG. 12 employs a metal can as the container body 89. A pouch 17 is suspended from the valve 14. The other points are substantially the same as the aerosol container 80 of FIG. The container main body 89 is a monoblock can in which a body portion 90, a shoulder portion 91, and a neck portion 92 are integrally formed, and an annular bead portion 93 is provided at the upper end of the neck portion. It may be a three-piece can having a bottom portion, a trunk portion, and a spectacle portion (dome). The eyeglass part is provided with a bead part. In this aerosol container 88, the pouch 17 is attached to the valve 14 via a connecting member, thereby forming a double aerosol container. The bead portion 93 is formed by curling the upper end of the neck portion outward.

  Further, in this embodiment, the bead portion 93 is plastically deformed into a rectangular cross section. In this embodiment, the bead portion 93 has a flat top surface, a cylindrical outer peripheral surface, and a substantially flat bottom surface. Thereby, the engagement between the lower end of the cover member 16 and the lower surface of the bead portion 93 is ensured, and the fixing strength of the valve holder 13 is increased. The lower surface may have a taper shape that goes upward as it goes outward as in FIG. 1, or may have a reverse taper shape. The seal structure 20 between the valve holder 13 and the container main body 89 is substantially the same as in the case of FIG.

  The aerosol container 94 shown in FIG. 13 is substantially the same as the aerosol container 10 of FIG. 1 except that a metal can similar to that of FIG. The bead portion 93 at the upper end of the container main body 89 has a substantially rectangular cross section. Further, the two valves 14 and 15, the valve holder 13, the cover member 16, and the connecting member 49 are the same as those in FIG. As for the aerosol containers 88 and 94 of FIGS. 12 and 13, any of the above-described seal structures can be employed, and the effects of the respective seal structures can be achieved.

  In any of the above-described embodiments, the opening at the upper end of the container body is closed with a valve holder and a valve. However, the seal structure of the present invention can also be used when a simple lid having no valve is closed. Further, as a structure for attaching the cover member to the container main body, in addition to the above-described caulking, it is possible to employ screw tightening in the same manner as the screw tightening type cap disclosed in Patent Document 2. The seal member used in the seal structure of the present invention is generally an O-ring having a circular cross section and a circular ring shape as a whole, but other shape seal members such as a square cross section and an oval overall shape are employed. You can also.

10 Double aerosol container 11 Container body 12 Upper end opening (mouth)
13 Valve holders 14 and 15 Valve 16 Cover members 17 and 18 Pouch 20 Seal structure 21 Body portion 22 Shoulder portion 23 Neck portion 24 Flange 25 Upper end surface 26 Locking step portion 27 Top plate 28 Perimeter wall 30 O-ring 31 O-ring groove 32 Recess 33 Bottom plate 34 Opening 35 Step portion 36 Engagement step portion 37 O-ring (seal material) for valve
38 Step portion 40 Contact portion 41 Step portion 42 Housing 43 Stem 44 Holding cover 45 Upper plate 46 Side wall 46a Engagement step portion 46b Lower end vicinity 47 Opening 48 Pouch body 49 Connecting member 50 Perimeter 51 Cylindrical protrusion 52 Cylindrical portion

53 Joint part 54 Spout 55 Push button 60 Aerosol container 61 Partition 62 Pouch 63, 64 Compartment 65 Connection member 66 Fitting hole 67 Communication hole 68 Vertical surface 70 Seal structure 71 Groove 72, 73 Seal point 74 O-ring long vertically Groove 75 (Passing gas) Groove 76 Seal structure 77 Notch step 78 Vertical groove 79 Seal structure 80 Aerosol container 81 Dip tube 82 Valve holding part 83 Rib 84 Aerosol container 85 Top plate 86 Peripheral part 88 Aerosol container 89 Container body 90 Trunk 91 shoulder 92 neck 93 bead 94 aerosol container

Claims (10)

A container mouth seal structure comprising a mouth opening at the upper end of the container body, a lid for closing the mouth, and a seal member interposed therebetween,
The inner peripheral surface of the mouth is a smooth cylindrical shape,
The cover includes a peripheral wall that is inserted into the mouth,
An annular seal groove for holding the seal member is formed on the outer peripheral surface of the peripheral wall of the lid,
The seal member is a ring-shaped member that is interposed between the bottom surface of the seal groove on the peripheral wall of the lid and the inner peripheral surface of the mouth of the container body, and is elastically deformed by being pressurized in the radial direction. ,
Furthermore, a cover member for fixing the lid to the upper end of the container body is provided ,
A locking step is provided on the outer periphery of the container body, and the lower end periphery of the cover member is caulked to the locking step.
A container mouth seal structure in which the lid is a valve holder for holding an aerosol valve, and the container body is a pressure resistant container . The container mouth portion sealing structure according to claim 1, wherein the lid body includes an annular contact portion that contacts an upper end surface of the container body. The seal structure of the container mouth part of Claim 2 with which the groove | channel through which gas passes is formed in the contact part of the upper end surface of the said container main body, or the cover body contacted with it. The seal structure of the container mouth part according to claim 1, wherein the vertical dimension of the seal groove is larger than the vertical dimension of the seal member compressed and deformed in the radial direction. A seal portion for compressing the seal member in the radial direction and a seal release portion having a smaller diameter than the seal portion provided below the seal portion are provided on the bottom surface of the seal groove on the peripheral wall of the lid body. Item 5. A container mouth seal structure according to any one of Items 1 to 4 . 6. The container mouth seal structure according to claim 5, wherein the bottom surface of the seal groove on the peripheral wall of the lid body has a tapered shape that gradually decreases in diameter from the seal portion to the seal release portion. The container mouth portion sealing structure according to any one of claims 1 to 6, wherein a notch step portion is provided above the inner peripheral surface of the mouth portion so as to allow a sealing member formed to expand in diameter. The seal structure of the container mouth part according to any one of claims 1 to 7, wherein said container body is a bottle made of synthetic resin. The container body has a cylindrical neck portion formed with a flange projecting outward on the outer periphery of the upper end;
The inside of the neck is a mouth,
The lower surface of the flange is a locking step,
The seal structure of the container mouth part of Claim 8 with which the seal groove of the surrounding wall of the said cover body is provided in the position corresponding to the lower surface of a flange. The seal structure of the container mouth part according to any one of claims 1 to 7, wherein said container body is a metal can.

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