JP7398949B2 - Pressurized products and discharge equipment using them - Google Patents

Description

The present invention relates to a pressurized product in which an inner container is filled with a stock solution, a pressurizing agent is filled between an outer container and an inner container, and the container is sealed with a lid, and a dispensing device using the pressurized product.

Patent Document 1 describes a discharge device in which a discharge member including a valve is attached to a container filled with a stock solution and a pressurizing agent. In this discharge device, the discharge member is removably attached to the container. Specifically, the discharge member includes a valve and a cap that covers the valve, and the discharge member is attached to the container by screwing the cap onto a screw provided on the outer periphery of the neck of the container. . Therefore, it is possible to reuse the ejection member by removing it from the container and replacing it with a new container after all the stock solution has been ejected.

Further, in FIG. 7a and paragraph [0066] of Patent Document 1, after filling the container body with the stock solution, the mouth of the container body is closed with a cup-shaped housing portion that receives the valve, and a slit formed in the neck of the container body is It is disclosed that the flange portion of the housing portion is airtightly fixed to the stepped portion of the neck portion of the container body by welding or the like at the same time as filling the pressurizing agent through the container body.

Patent Document 2 discloses a technique in which a wire seal is interposed between the container body and the housing of the valve, and a fixed lid for fixing the housing to the container body is ultrasonically welded to the upper surface of the neck of the container body. There is. This product can stably prevent the contents from penetrating into the welded area for a long period of time by using a line seal.

Patent Document 3 discloses a mounting cup that includes a container body, an inner bag accommodated therein, and a valve that fits into the neck of the container body via the neck of the inner bag and discharges the stock solution in the inner bag. A dual aerosol product is disclosed having a. The neck of the inner bag is provided with a reduced diameter part (constriction), which fits into the lower part of the mounting cup. Further, an inner bag is sandwiched and sealed between the lower end corner of the outer circumferential projection of the mounting cup and the container body.

International Publication No. 2015/080252 Japanese Patent Application Publication No. 2018-177265 Patent No. 5560035

In the discharge device of Patent Document 1, it is described that the flange portion of the housing portion is fixed to the stepped portion of the opening of the container body by welding or the like. This dispensing device welds the flange part under pressure after filling the container body with the stock solution and pressurizing agent, but there is no internal container for filling the stock solution, and there is a space between the flange part that will be the welding part and the stock solution. Since there is a space filled with pressurizing agent, the welded part is not easily affected by atomization of the raw solution even if welded by ultrasonic waves.

In the discharge container of Patent Document 2, the housing is attached after the container body is filled with the stock solution, and the fixing member is welded to the container body. This discharge container also does not have an internal container for filling the stock solution, and the welded portion is not easily affected by atomization of the stock solution.

Since the inner bag of Patent Document 3 is flexible and the container body is made of metal, a sealing effect can be obtained by sandwiching the inner bag between the corner and the container body. However, in reality, the inner bag is tightly closed by plastically deforming the metal cover inward, and it is difficult to achieve a seal without using metal materials.

The present invention is a double pressurized container in which the inner container is filled with a stock solution, a pressurizing agent is filled between the outer container and the inner container, the outer container and the inner container are closed with a lid, and they are ultrasonically welded. The technical problem is to improve the sealing performance between the inner container and the lid body, to suppress the infiltration of the stock solution into the welded part, and to suppress the intrusion of the pressurizing agent into the inner container.

The pressurized product 11a of the present invention includes a container body 16 consisting of an outer container 13 and an inner container 14 housed inside the container body 16, a lid body 15 that closes the upper end opening of the container body 16, and an inner container 14 (Sc). It consists of the filled stock solution C and the pressurizing agent P filled between the outer container 13 and the inner container 14 (Sp), and the outer container 13 and the inner container 14 are made of thermoplastic resin, and each has a neck portion 13d. , 14d. 13 and a flange 15b ultrasonically welded to the upper end surfaces 13f, 14e of the necks 13d, 14d of the inner container 14, and one or both of the outer periphery of the sealing portion 15a and the neck 14d of the inner container 14. It is characterized in that fitting portions 15p and 15p1 are provided which annularly abut and perform a sealing action.

In such a pressurized product 11a, it is preferable that the neck portion 14d of the inner container 14 has a tapered portion 14a2 whose diameter decreases downward. Further, a tapered surface 15a8 having approximately the same taper angle as the tapered portion 14d2 of the inner container 14 is provided on the outer periphery of the sealing portion 15a, and the fitting portion (15p , 15p1) are preferably provided. Furthermore, a tip tapered surface 15a7 having a gentler angle than the tapered surface 15a8 is provided at the lower part of the sealing portion 15a, and a boundary 15p between the tapered surface 15a8 and the tip tapered surface 15a7 serves as the fitting portion. is preferred. It is preferable that the fitting portions (15p, 15p1) are annular protrusions 15p1 or annular corners. A cylindrical portion 14a3 is provided at the bottom of the tapered portion 14a2, and a cylindrical portion 15a9 having an outer diameter equal to or larger than the inner diameter of the cylindrical portion 14a3 is provided at the bottom of the sealing portion 15a. It is preferable that the portion 14a3 and the cylindrical portion 15a9 fit together to form the fitting portion. Fitting portions (15p, 15p1) are provided on the outer periphery of the sealing portion 15a, and a deforming portion that deforms by abutting against the fitting portions (15p, 15p1) is provided on the neck portion 14d of the inner container 14. Preferably. Further, the lid body 15 has a fitting cylinder part 15a1 into which the discharge member 12 having the valve 21 is airtightly fitted, and the lid body 15 is opened by inserting the discharge member 12 into the bottom part 15c of the fitting cylinder part 15a1. It is preferable that an unsealed part (closed part 15d) is provided.

The dispensing device 10 of the present invention is removably attached to the upper end of the container body 16 and any of the pressurized products 11a, is in liquid-tight and airtight contact with the lid 15 of the pressurized product 11a, and is arranged in the inside of the pressurized product 11a. It is characterized by comprising a discharge member 12 equipped with a valve 21 for operating the discharge/stop of the stock solution C in the container 14.

In the pressurized product of the present invention, by attaching the lid to the internal container filled with the stock solution, the fitting portion formed on either or both of the lid and the internal container comes into contact with the other member. A sealing action is performed. Therefore, when filling the gap between the outer container and the inner container with the pressurizing agent, the pressurizing agent is prevented from flowing into the inner container. In addition, even if the stock solution in the inner container becomes atomized due to vibration during subsequent ultrasonic welding, the vapor of the stock solution is blocked by the fitting part, preventing it from adhering to the upper end surface of the neck of the inner container, thereby preventing welding. It does not get in the way and prevents the undiluted solution from penetrating into the welded area and deteriorating the welded area after welding. Furthermore, melted resin protrudes during ultrasonic welding, solidifies as it cools, and becomes resin pieces, but the fitting part prevents it from falling into the internal container, so the resin pieces do not clog the valve. .

In such a pressurized product, if the neck of the inner container has a tapered portion that decreases in diameter toward the bottom, when the lid is attached to the container body, the sealing portion of the lid will not fit into the taper of the inner container. Since it is inserted while being guided by the lid, the position of the lid is stable and it is easy to ultrasonically weld the lid to the upper end surfaces of the necks of both the outer container and the inner container. Moreover, the sealing effect is enhanced by pressing the lid. Furthermore, since the fitting portion with the tapered portion is formed at a position away from the welded portion, it is easy to prevent penetration into the welded portion during and after welding.

Further, in the case where the outer periphery of the sealing part is provided with a tapered surface having approximately the same taper angle as the tapered part of the inner container, and the fitting part is provided in the middle or at the corner of the lower end of the tapered surface, When inserting the lid into the inner container, the tapered surfaces act as guides, allowing for smoother insertion. Further, the lid is held by the fitting portion, and the sealing by the fitting portion is strengthened by subsequent pressing.

In the case where a tip tapered surface having a gentler angle than the tapered surface is provided at the lower part of the sealing portion, and the boundary between the tapered surface and the tip tapered surface is the fitting portion, the lid is attached to the container body. can be mounted more accurately and concentrically, and the formation of a seal is more reliable. In addition, when the fitting portion is an annular projection or an annular corner, it makes strong linear contact with the mating member, so that a more reliable sealing effect can be achieved.

A cylindrical part is provided at the lower part of the tapered part, and a cylindrical part having an outer diameter that is the same as or larger than the inner diameter of the cylindrical part is provided at the lower part of the sealing part, and the cylindrical part and the cylinder are provided at the lower part of the sealing part. When the parts fit together to form the fitting part, the cylindrical part can be easily attached to the cylindrical part, and the sealing effect can be achieved without pressing the lid. Therefore, the manufacturing process is simplified.

If a fitting part is provided on the outer periphery of the sealing part, and a deforming part that deforms by contacting the fitting part is provided in the neck part of the inner container, the fitting part deforms the neck part of the inner container. Strongly contact the object while causing the object to move, or bite it. Therefore, the sealing action is performed more reliably.

When the lid body has a fitting cylinder part into which a discharge member having a valve is airtightly fitted, and an unsealed part that is opened by inserting the discharge member is provided at the bottom of the fitting cylinder part. When the discharge member is inserted into the lid and the unsealed portion is opened, the discharge member and the fitting cylinder are airtightly fitted, so that the stock solution is unlikely to leak to the outside.

Since the discharge device of the present invention is equipped with the above-mentioned pressurized product, it can produce the above-mentioned effects. After discharging the stock solution, the discharging member can be reused by replacing it with a new pressurized product.

FIG. 1A is a cross-sectional view showing a dispensing device, and FIG. 1B is a cross-sectional view of a container body used in the dispensing device. FIG. 2A is a cross-sectional view of the main parts of the lid and the container body, and FIG. 2B is a cross-sectional view of the main parts when the lid is attached to the container main body. FIG. 3A is a sectional view of the discharge member, and FIG. 3B is a sectional view of the main part of the pressurized product. FIG. 4A is a sectional view of the main part of the discharge device before opening, and FIG. 4B is a sectional view of the main part after opening. FIG. 5A is a cross-sectional view of a main part showing a pressurized product before welding of a lid according to another embodiment, and FIG. 5B is a cross-sectional view of a main part showing a pressurized product after welding. FIG. 6A is a cross-sectional view of a main part showing a pressurized product before welding of a lid according to still another embodiment, and FIG. 6B is a cross-sectional view of a main part showing a pressurized product after welding.

A discharge device 10 shown in FIG. 1A includes a double pressurized container (container) 11, a discharge member 12, a stock solution (content) C and a pressurizing agent P filled in the double pressurized container 11. A pressurized product 11a is a double pressurized container 11 filled with a stock solution C and a pressurizing agent P. The pressurized product 11a and the discharge member 12 are sold as an unassembled set (see FIG. 1A) or in a half-assembled, unopened state (see FIG. 4A). The pressurized product 11a is not only sold together with the discharge member 12, but also sold alone as a replacement. Therefore, the pressurized product 11a is sealed so that the filled stock solution C and the pressurizing agent P do not leak out until the discharge member 12 is attached (until it is unsealed by the discharge member 12). The discharge member 12 may also be sold separately.

The double pressurized container 11 includes an outer container 13, a flexible inner container 14 housed inside the outer container 13, and a lid (sealing board) 15 that seals the outer container 13 and the inner container 14. Consisting of There are no valves or pumps. The combination of the outer container 13 and the inner container 14 is a container body 16 (see FIG. 1B). The inside of the inner container 14 is a stock solution storage chamber Sc filled with the stock solution C, and the space between the outer container 13 and the inner container 14 is a pressurizing agent storage chamber Sp filled with the pressurizing agent P. They are sealed by a lid 15. That is, this double pressurized container 11 separately stores the stock solution C and the propellant P, and enables only the stock solution C to be discharged, thereby preventing leakage of the pressurizing agent P such as compressed gas.

As shown in FIG. 1B, the outer container 13 includes a bottom portion 13a, a cylindrical body portion 13b, a shoulder portion 13c, and a cylindrical neck portion 13d. A male thread 13e is formed on the outer periphery of the neck portion 13d. In this embodiment, the bottom portion 13a of the outer container 13 includes a downwardly projecting annular ground surface 13a1 and an upwardly projecting dome portion 13a2 provided at the center thereof. This improves pressure resistance and impact resistance when dropped. Therefore, it is safe even when distributed individually or delivered by courier. Further, since it has the ground plane 13a1, it can be stably placed on a flat table or the like. However, the bottom surface may be spherical.

As shown in FIG. 2A, the upper end surface 13f of the neck 13d of the outer container 13 is made substantially flat so that the lid 15 can be fixed thereto. An annular protrusion 13g is formed on the upper end surface 13f to increase the contact pressure with the lid 15 during ultrasonic welding to facilitate melting and to create a welded part to be integrated with the lid 15. There is. The annular protrusion may be provided on the lid 15 side, or may be provided on both sides. An annular support portion 13d1 is provided on the outer periphery of the neck portion 13d of the outer container 13 to suspend it during transportation or welding.

Returning to FIG. 1B, like the outer container 13, the inner container 14 also includes a bottom portion 14a, a body portion 14b, a shoulder portion 14c, and a neck portion 14d. The bottom 14a of the inner container 14 is also formed with a downwardly projecting annular recess 14a1 and an upwardly projecting dome 14a2 provided at the center thereof. There is a slight gap between the outer surface of the cylindrical upper portion 14d1 of the neck 14d of the inner container 14 and the inner surface of the neck 13d of the outer container 13. The inner surface of the neck 14d of the inner container 14 is a smooth cylindrical surface. The bottom 14a of the inner container 14 is in contact with the bottom 13a of the outer container 13, and is supported so that the inner container 14 does not fall down when filling with pressurizing agent or fixing the lid 15.

As shown in FIG. 2A, the upper end surface 14e of the neck 14d of the inner container 14 protrudes from the upper end surface 13f of the outer container 13, and a flange 14f that engages with the upper end surface 13f of the outer container 13 is provided at the protruding portion. It is formed. The thickness (radial dimension) of the flange 14f is about 1/3 to 1/2 of the thickness of the neck 13d of the outer container 13. Therefore, when the flange 14f is engaged with the upper end surface 13f of the neck portion 13d of the outer container 13, the outer portion of the upper end surface 13f of the neck portion 13d of the outer container 13 remains uncovered. The annular projection 13g at the upper end of the external container 13 is provided on the outer side thereof. An annular projection 14g is also formed on the upper end surface 14e of the neck 14d of the inner container 14 to increase the contact pressure with the lid 15 during ultrasonic welding and create a welded part with the lid 15. .

The neck portion 14d of the inner container 14 is shaped to be in close contact with the outer circumferential surface of a sealing portion 15a, which will be described later, and includes a cylindrical upper portion 14d1, a tapered portion 14d2 that tapers downward from the upper portion 14d1, and a portion extending from the lower end of the neck portion 14d. It consists of a cylindrical portion 14d3 extending downward. The lower end of the cylindrical portion 14d3 is continuous with the shoulder portion 14c. That is, the tapered part 14d2 of the neck part 14d of the inner container 14, the cylindrical part 14d3, and the upper part of the shoulder part 14c form a constricted part. The tapered portion 14d2 is thinner than other portions. This is so that when the lid 15 is fitted, the fitting portion (boundary 15p) provided around the lid 15 contacts the tapered portion 14d2 in an annular manner to facilitate forming a linear seal (see FIG. 2B). . There is a gap between the tapered portion 14d2 or the cylindrical portion 14d3 and the inner surface of the neck portion 13d of the outer container 13. Therefore, the tapered portion 14d2 is easily elastically deformed.

On the lower surface of the flange 14f of the inner container 14, radially extending lateral grooves 14h for filling the pressurizing agent are formed at four equal intervals. Furthermore, a vertical groove 14i communicating with the horizontal groove 14h is formed on the outer peripheral surface of the upper part 14d1 of the neck 14d of the inner container 14. The vertical groove 14i extends from the horizontal groove 14h to the upper end of the tapered portion 14d2, and facilitates filling of the pressurizing agent P into the pressurizing agent storage chamber Sp. Since there is a gap between the tapered portion 14d3 and the inner surface of the neck portion 13d of the outer container 13, the vertical groove 14i is not necessary.

Both the outer container 13 and the inner container 14 are made of thermoplastic resin such as polyethylene terephthalate, polyethylene naphthalate, polyethylene, and polypropylene. These can be manufactured by, for example, inserting a preform for the inner container into a preform for the outer container and simultaneously blow molding the lower ends of the necks 13d and 14d. Particularly preferred is an injection blow molding method in which a preform of a predetermined shape is injection molded and then blow molded. In the case of injection blow molding, the neck parts 13d and 14d are not stretched, so they are thick and have high strength. The portions from the shoulders 13c, 14c to the body portions 13b, 14b are stretched and made thinner, but the inner container 14 is made thicker (for example, 0.1 to 0.3 mm) to provide flexibility and pliability. On the other hand, the outer container 13 is formed to have a pressure-resistant wall thickness (for example, 0.4 to 1 mm).

As shown in FIG. 2A, the lid 15 includes a bottomed cylindrical sealing part 15a inserted into the neck 14d of the inner container 14, and an annular flange 15b continuous to the upper end of the sealing part 15a. The sealing portion 15a extends downward, and a fitting cylinder portion 15a1 is provided concentrically inside the sealing portion 15a. The fitting cylinder portion 15a1 rises upward from the center of the bottom portion 15c of the sealing portion 15a, and is open at the upper end. The upper part 15a2 of the sealing part 15a has a substantially cylindrical shape, and the lower part 15a3 has a tapered shape that becomes thinner toward the bottom. However, it may be cylindrical from the upper part 15a2 to the lower part 15a3.

The lower end 15a4 of the tapered lower portion 15a3 and the lower end of the fitting cylinder portion 15a1 are connected by a connecting portion 15a6. Further, the fitting cylinder portion 15a1 is provided with a closing portion (unsealed portion) 15d that is opened by the discharge member 12 at a bottom portion 15c that closes slightly above the lower end. However, the connecting portion 15a6 and the closing portion 15d may be at the same height. The connecting portion 15a6 and the bottom portion 15c can also be seen as the bottom portion of the cup-shaped sealing portion 15a as a whole.

In this embodiment, a tapered surface 15a7 having a smaller taper angle than the taper angle of the lower part 15a3 is provided on the outer peripheral surface near the lower end of the lower part 15a3. A curved surface or a bowl-shaped portion may be provided instead of the tapered surface 15a7 having a gentle angle. When the lid body 15 is fitted into the neck part 14d of the inner container 14 as shown in FIG. 2B, the boundary 15p between the steeply angled tapered surface 15a8 of the lower part 15a3 and the tapered surface 15a7 at the lower end is the inner surface of the tapered part 14d2 of the neck part 14d. It constitutes an annular fitting part that is strongly abutted against. A line seal is formed between the inner container 14 and the lid 15 by the fitting portion of the boundary 15p.

By forming a line seal when the lid 15 is placed over the container body 16 in this manner, it is possible to prevent the pressurizing agent P from entering the inner container 14 when filling it, and also to prevent the pressurizing agent P from entering the inner container 14 when filling the container body 16. Even if the stock solution C is atomized by ultrasonic vibration when welding the bodies 15, it is prevented from flowing out to the welding part through the gap between the tapered lower part 15a3 and the tapered part 14d2 of the neck of the inner container, and the welding is prevented. Not hindered. Note that instead of the fitting portion 15p having a varying taper angle, the outer peripheral surface of the tapered lower portion 15a3 may be made into a spherical shape and brought into contact with the tapered portion 14d2 of the neck portion to form the line seal 15a.

A pressure receiving part 15d1 that is thicker than the surrounding area is provided on the upper surface of the closing part 15d. The closing portion 15d and the pressure receiving portion 15d1 are normally circular in plan view. However, other shapes such as a rectangle can also be used.

The closing portion 15d is surrounded by a thin-walled portion (broken portion, line of weakness) 15f that is easily broken, such as an annular groove. The pressure receiving portion 15d1 is provided on substantially the entire upper surface of the closing portion 15d, and the thin wall portion 15f is formed on the upper surface of the bottom portion 15c. Note that the thin portion 15f may be formed on the lower surface. The thin portion 15f is formed of, for example, a V-groove. Although some of the thin wall portions 15f are not provided and are discontinuous so that the closing portion 15d does not fall when broken, the thin wall portions 15f may be continuous over the entire outer periphery of the pressure receiving portion 15d1.

The outer circumferential surface of the sealing part 15a is connected to the inner surface of the neck part 14d of the inner container 14, so that the air inside the inner container 14 can be exhausted when the lid body 15 is attached to the neck part 14d of the inner container, and , it is preferable that the fitting state is such that the stock solution C in the inner container 14 can be sealed.

Basically, it is preferable that the inner circumferential surface of the fitting cylinder part 15a1 be a smooth cylindrical surface so that it comes into close contact with the sealing member 28 of the valve 21 when the closing part 15d is opened, so that the stock solution C does not leak. . It may also have a tapered shape that decreases in diameter toward the bottom. However, a groove 15n extending in the vertical direction is provided in the upper part of the fitting cylinder portion 15a1. When the user mistakenly attempts to remove the discharge member 12 even though the stock solution C remains, the groove 15n partially releases the seal and leaks a small amount of stock solution C, which alerts the user. This constitutes a partial release mechanism to encourage

The reason why the bottom part 15c of the fitting cylinder part 15a1 is provided slightly above the lower end of the fitting cylinder part 15a1 is to increase the rigidity of the bottom part 15c and to make it easier to break the thin part 15f. This is also because vibrations from the ultrasonic welding horn H that comes into contact with the top surface of the lid 15 tend to flow from the lower end of the sealing part 15a to the stock solution C side. This prevents the line of weakness 15f from dissolving or penetrating. The reason why the diameter of the fitting cylinder part 15a1 is made smaller than the diameter of the upper part of the sealing part 15a is to improve the molding accuracy of the inner surface of the fitting cylinder part 15a1, and to reduce the internal pressure surrounded by the seal member 28 of the discharge member 12. This is to reduce the receiving area and weaken the upward force applied to the discharge member 12. This is to ensure a space for accommodating the valve holding portion 18a that further projects downward. The lower end of the fitting cylinder part 15a1 may be cylindrical, but it may be communicated with a lateral groove so that gas does not accumulate between the lower end of the fitting cylinder part 15a1 and the bottom part 15c.

The flange 15b of the lid 15 includes an annular disk portion 17 that extends radially outward from the upper end of the sealing portion 15a, and an outer cylinder portion 17a that extends downward from the outer edge of the annular disk portion 17. The lower surface of the annular disk portion 17 is in contact with the upper end surface 14e of the neck portion 14d of the inner container 14 to form a welded portion and is sealed, and the lower surface of the outer cylinder portion 17a is the upper end surface 13f of the neck portion 13d of the outer container 13. This is the part that contacts and forms a weld and seals. Further, a notch 15h is provided on the outer periphery of the upper surface of the lid body 15. This notch 15h facilitates the vibration of the horn to concentrate on the annular protrusion 13g at the upper end of the neck of the outer container 13 when the horn is pressed against the top surface of the lid 15 for ultrasonic welding.

The material of the lid 15 is a thermoplastic resin that has high thermal bonding properties with the outer container 13 and the inner container 14, and it is preferable to use the same material as the outer container 13 and the inner container 14 in order to increase the welding strength. As shown in FIG. 1A or FIG. 2B, by sealing the stock solution storage chamber Sc and the pressurizing agent storage chamber Sp with the lid 15, and fixing it to either the inner container 14 or the outer container 13, or both, The contents (undiluted solution C, pressurizing agent P) can be safely stored for a long time without leaking. The thin wall portion 15f has a shape that has a sufficient sealing function when unopened and can be easily broken.

Undiluted solution C includes skin products and treatment agents such as facial cleansers, detergents, bath additives, moisturizers, cleansing agents, sunscreens, lotions, shaving agents, depilatory agents, antiperspirants, sterilizing agents, pest repellents, etc. , human body products such as hair products such as styling products and hair dyes, food products such as whipped cream and olive oil, household products such as deodorants, air fresheners, cleaning agents, insecticides, repellents, pollen removers, and disinfectants. These include industrial supplies such as supplies and lubricants. However, it is not limited to these uses.

The pressurizing agent P is preferably a compressed gas such as nitrogen gas, compressed air, or carbon dioxide gas. The pressure inside the double pressurized container 11 is set to 0.1 to 0.5 MPa (25° C., gauge pressure) using a pressurizing agent, especially 0.3 to 0.5 MPa (25° C., gauge pressure), which is about the same pressure as carbonated beverages. ) is preferable. Further, the capacity of the external container 13 is preferably 30 to 500 ml. The capacity of the internal container (undiluted solution storage chamber Sc) 14 is preferably about 20 to 300 ml. The capacity of the pressurizing agent storage chamber Sp is preferably about 10 to 200 ml.

To manufacture the pressurized product 11a using the outer container 13, inner container 14, and lid 15 configured as described above, first, the inner container 14 is housed in the outer container 13, and the stock solution C is poured into the inner container 14. Fill the container and cover the container body 16 with the lid 15. In this state, the fitting portion (boundary 15p) and the inner surface of the tapered portion (lower portion 15a3) of the neck portion 14d of the inner container 14 are in contact and held. By pushing in the lid 15 with the horn H from this state, the tapered part 14d2 of the inner container is deformed so as to be pushed open as shown in FIG. 2, and a sealing action is performed between it and the fitting part 15p. The part that deforms is the deformed part.

In this state, there is a gap between the lower surface of the outer cylindrical portion 17a of the flange 15b of the lid 15 and the upper end surface 13f of the neck of the outer container 13, but when the lid 15 is pushed further, the annular disc of the lid 15 The lower surface of the portion 17 and the lower surface of the outer cylindrical portion 17a come into contact with the annular projections 13g and 14g of the outer container 13 and the inner container 14, and the load applied to the horn H suddenly increases. When this change in load is detected, the pressurizing agent P is injected from the gap between the upper end surface 13f of the outer container 13 and the lower surface of the outer cylinder part 17a of the lid body 15, and is passed through the horizontal groove 14h and the vertical groove 14i of the inner container 14. and fills the pressurizing agent storage chamber Sp. Note that even if the lower surface of the outer cylinder portion 17a and the annular protrusion 14g come into contact with each other, it is not an airtight state, and since the pressurizing agent P is injected at high pressure, the pressurizing agent storage chamber Sp is filled. On the other hand, since the space between the inner container 14 and the lid body 15 is sealed by the contact between the fitting part (boundary 15p) and the inner surface of the neck part 14d of the inner container 14, the pressurizing agent P is inside the inner container 14 as described above. It can be prevented from entering the container 14.

When the pressurizing agent storage chamber Sp reaches a predetermined pressure, the load applied to the horn H is sensed, and the lid 15 is further pushed down while the horn H emits ultrasonic vibrations. At this time, the annular projections 13g and 14g are melted by the ultrasonic vibration, and the lid 15, the outer container 13, and the inner container 14 are welded together. During this welding, the fitting portion (boundary 15p) of the lid 15 bites into the inner surface of the lower portion 14d2 of the neck portion 14d of the inner container 14, thereby producing a sealing effect. Thereby, as described above, there is no fear that the stock solution C atomized by ultrasonic vibration will rise and interfere with welding. Furthermore, even if the container 11 is turned upside down after welding, the stock solution C is blocked by the fitting portion (boundary 15p), so that it is prevented from penetrating into the welding portion. Note that depending on the pressing force of the lid 15 when oscillating ultrasonic vibrations, it is expected that the fitting portion (boundary 15p) and the inner surface of the neck portion 14d of the inner container 14 will be lightly welded, and the sealing performance will be further improved. Ru.

In this way, the flange 15b of the lid 15 is welded to the upper end surface 13f of the neck 13d of the outer container 13 and the upper end surface 14e of the neck 14d of the inner container 14 by ultrasonic welding after filling with the stock solution C and the pressurizing agent P. and sealed. In this embodiment, an annular projection 14g is formed on the upper end surface 14e of the inner container 14, and an annular projection 13g is also formed on the upper end surface 13f of the outer container 13, so that the sealing after welding is reliable.

As described above, the double pressurized container 11 has a small number of parts and has no operating parts such as valves, so it can be manufactured at low cost. Since the pressure in the double pressurized container 11 is low, comparable to that of carbonated drinks, it is safe when carried by consumers or delivered by distributors. Furthermore, even if the outer container 13 were to crack, only the pressurizing agent P would leak, but the stock solution C in the inner container 14 would not leak. Therefore, it is even safer.

Further, in this pressurized product 11a, the outer container 13 and the inner container 14 are made of synthetic resin, and the inner container 14 is surrounded by the pressurizing agent P and further surrounded by the outer container 13, so that the pressurized product 11a is It has high elasticity and does not break easily even if dropped. Furthermore, since the closing portion 15d is located inside, there is less risk of the closing portion 15d being accidentally broken, making it even safer.

The discharge member 12 includes a cap (installation part) 20 that is screwed into the external thread 13e of the neck 13d of the outer container 13, a valve 21 covered by the cap 20, and a discharge member that is attached to the stem 22 of the valve 21. It consists of an operation button (actuator, reference numeral 23 in FIG. 1A) equipped with a nozzle. As shown in FIG. 3A, the cap 20 has a cylindrical shape with a bottom, and is a so-called screw cap in which a female thread is formed on the inner peripheral surface. The cap 20 and the valve 21 are integrated, and the valve 21 moves within the fitting cylinder portion 15a1 in conjunction with the tightening condition of the cap 20. That is, when the cap 20 is tightened, the valve 21 is pushed into the fitting cylinder part 15a1, and when the cap 20 is loosened, the valve 21 is moved in the direction to be extracted from the fitting cylinder part 15a1. An opening 20b is formed in the center of the upper base 20a of the cap 20, through which the stem 22 and the base of the operation button 23 are passed. The cap 20 and the valve 21 without the operation button 23 are treated as a valve unit or a valve assembly.

The valve 21 includes a bottomed cylindrical housing 24, the aforementioned stem 22 housed inside the housing so as to be able to move up and down, a spring 25 that biases the stem 22 upward, a stem rubber 26, and the housing 24. The valve holder 18 includes a cylindrical valve holding part 18a that holds the upper part, and constitutes a discharge passage for the stock solution C. The stem 22, the spring 25, and the stem rubber 26 constitute a valve mechanism that switches between a discharge state and a non-discharge state of the stock solution C, and the housing 24 and the valve holder 18 form an accommodation space for accommodating this valve mechanism. It consists of

In this embodiment, a cylindrical opening portion 27 that projects downward is provided at the lower end of the housing 24, and a sealing member 28 such as an O-ring is attached to the lower outer periphery of the housing 24. This sealing member 28 seals between the inner circumferential surface of the fitting cylindrical portion 15a1 of the lid 15 and the housing 24 during and after unsealing. Since this sealing member 28 is compressed between the inner surface of the fitting cylinder portion 15a1 and the outer surface of the housing 24, which are spaced almost equally apart in the vertical direction, the seal can be maintained even if the sealing member 28 moves slightly in the vertical direction. . The bottom surface 27a of the unsealing section 27 is made flat so as to come into contact with the top surface of the pressure receiving section 15d1.

In this embodiment, the diameter of the opening portion 27 is somewhat smaller than the pressure receiving portion 15d1. Further, the diameter is somewhat smaller than the diameter of the range surrounded by the thin portion 15f. Therefore, when the seal is broken, the bottom surface 27a of the unsealing portion 27 does not come into contact with the outer peripheral portion of the bottom portion 15c rather than the thin wall portion 15f, thereby preventing the pressing of the pressure receiving portion 15d1 (see FIG. 4B). Further, after being broken, the bottom surface 27a of the unsealing portion 27 can be made to protrude downward from the opening formed by unsealing, making it easy to secure a passage for the stock solution C (see FIG. 4B). A plurality of reinforcing plates 27d are provided radially between the cylindrical opening portion 27 and the lower surface 24a of the housing 24. The number of reinforcing plates 27d is preferably 3 to 5. The reinforcing plate 27d has a substantially triangular shape in a side view, and its lower end does not reach the lower end of the unsealing part 27, and the vicinity of the lower end of the unsealing part 27 remains cylindrical.

The housing 24 is provided with a vertical hole 24c that vertically penetrates the bottom plate 24b of the housing 24 as a passageway that communicates the inside of the housing 24 with the stock solution storage chamber Sc in the internal container 14. The vertical hole 24c is formed between adjacent reinforcing plates 27d. Therefore, the reinforcing plate 27d does not hinder the discharge of the contents. The vertical holes 24c are formed in the same number as the reinforcing plates 27d. However, it may be less than that, such as one or two. The planar shape of the vertical hole 24c can be, for example, approximately fan-shaped. It is preferable to provide a plurality of vertical holes 24c. Thereby, even if one vertical hole 24c is blocked, communication can be made through another vertical hole 24c.

The position in the height direction of the bottom surface 27a of the unsealing portion 27 is such that it comes into contact with the pressure receiving portion 15d1 when the cap 20 is screwed onto the male screw 13e of the outer container 13 about once or twice. Therefore, during shipping and distribution, the cap 20 is loosely screwed together, and the discharge member 12 and the double pressurized container 11 can be temporarily connected in a sealed state without breaking the closing part 15d (see FIG. 4A). ).

The valve holder 18 includes a valve holding part 18a, an annular rubber retainer 18b extending inward from the upper end of the valve retaining part 18a, and a flange 18c extending outward, and a hole through which the stem 22 passes through the center of the rubber retainer 18b. 18d is formed.

When a user uses a purchased dispensing device 10, the cap 20 is first screwed onto the male thread 13e of the external container. As a result, the entire cap 20 and the valve 21 are lowered, and the bottom surface 27a of the opening portion 27 pushes down the closing portion 15d. As a result, the thin wall portion 15f is broken and the pressurized product 11a is opened. A portion of the closing portion 15d remains connected to the bottom portion 15c (see FIG. 4B), or is torn off from the fitting cylinder portion 15a1, separated from the bottom portion 15c, and falls off. Then, the unsealing part 27 pierces the bottom part 15c of the fitting cylinder part 15a1, and communicates the inside of the housing 24 with the stock solution storage chamber Sc, which is inside the internal container 14 (see FIG. 4B). The fallen closure part 15d falls to the bottom of the inner container 14.

Note that since the cap 20 is screwed onto the external container 13, the amount of descent of the valve 21 relative to the amount of operation of the cap 20 is small. Therefore, the bottom surface 27a of the opening section 27 gradually presses the pressure receiving section 15d1 of the closing section 15d. Since the lid body 15 is made of synthetic resin, when it is gradually pressed, the closing part 15d easily stretches due to its extensibility and is difficult to break. However, in this embodiment, the closing portion 15d is surrounded by the annular thin wall portion 15f and the pressure receiving portion 15d1 protrudes, so that the stress concentration on the thin wall portion 15f increases and it can be broken smoothly. Further, since the bottom surface 27a of the unsealing portion 27 is flat, it is not easily deformed by the unsealing operation, and the discharge member 12 can be used repeatedly.

The closing part 15d has a thick, approximately circular pressure receiving part 15d1 on the upper part, which is provided on the central axis of the lid 15, and is in contact with the circular bottom surface 27a of the opening part 27, so that the pressure is not applied by the bottom surface 27a. When pressed, the closing portion 15d is pushed straight and breaks along the thin portion 15f. However, the pressure receiving portion 15d1 or the bottom surface 27a of the unsealing portion 27 may be inclined so that the thin portions 15f are sequentially broken from one side toward the other.

When the closing part 15d is torn, the stock solution C may leak from the gap between the inner periphery of the opening of the bottom part 15c and the outer periphery of the unsealing part 27. However, since the sealing member 28 seals between the fitting cylinder part 15a1 and the housing 24 downstream of the closing part 15d, the stock solution C remains within the fitting cylinder part 15a1 and does not leak to the outside. In addition, the reaction force at the time of rupture and the internal pressure after rupture act to push up the housing 24, but the cap 20 and the outer container 13 are screwed together, and the upper base 20a of the cap 20 and the valve holder 18 are Since the discharge member 12 is supported by the support member 1, the discharge member 12 is prevented from popping out. In this state, it can be said that the valve 21 is attached by the cap 20. Further, deformation of the upper base 20a of the cap 20 is suppressed.

After attaching the discharge member 12, when the user presses the operation button 23 attached to the stem 22, the stem 22 is lowered, the stem rubber 26 is bent, and the stem hole is opened. Since the stock solution C in the stock solution storage chamber Sc is pressurized by the pressurizing agent P via the internal container 14, it is discharged to the outside via the opening portion 27, the housing 24, the stem 22, and the operation button 23. When you release your finger from the operation button 23, the stem 22 rises and the discharge stops. The pressurizing agent storage chamber Sp filled with the pressurizing agent P is closed by the lid 15 and does not communicate with the outside or the stock solution storage chamber Sc, so the pressurizing agent P will not leak to the outside during the discharge operation. There isn't.

After discharging the entire amount of the stock solution C, the cap 20 is turned and the discharging member 12 is removed from the pressurized product 11a. Then, the removed discharge member 12 is attached to a new pressurized product 11a. In the pressurized product 11a from which the entire amount of the stock solution C has been discharged, the pressurizing agent P remains in the pressurizing agent storage chamber Sp, but this pressurizing agent P passes through the inner container 14 and is removed when the lid 15 is opened. It is gradually released to the outside from the portion 15d. Since the pressurized container 11 is easily deformed when the pressurizing agent P is released to the outside, it is easy for consumers to understand and the pressurized container 11 can be safely recycled. Furthermore, since the lid 15 and the container body 16 of the pressurized container 11 can be made of a single material, there is no need to separate them when recycling them, making them easy to recycle.

In the double pressurized container 11 shown in FIGS. 1A and 3B, a neck portion 14d of the inner container 14 has a constricted portion consisting of a tapered portion 14d2 and a cylindrical portion 14d3, and the constricted portion is in close contact with the sealing portion 15a of the lid 15. Therefore, when the internal container 14 is filled with the stock solution C, the gas phase portion Gp (head space) becomes small. Therefore, when a consumer starts using the product, the concentrated liquid C is vigorously discharged and scattered due to the gas compressed in the gas phase part Gp, and the concentrated liquid C is mixed with gas at the time of discharge, and the concentrated liquid C is discharged discontinuously. Problems such as leaking are less likely to occur, and dispensing becomes smoother. In particular, post-foaming gel compositions or post-foaming creams containing a foaming agent with a boiling point of -5 to 35°C, such as n-butane, isopentane, or 1-chloro-3,3,3-trifluoropropene, in the stock solution. Even when the composition is filled, the small gas phase portion Gp prevents foaming immediately after filling and allows the composition to be discharged in the form of a gel or cream.

In the double pressurized container 11 of FIG. 1A, the neck portion 14d of the inner container 14 and the lower part 15a3 of the sealing portion 15a of the lid body 15 can also be formed into a straight cylindrical shape. However, it is preferable to provide a constricted portion in the neck portion 14d of the inner container 14 and to make the lower portion 15a3 of the sealing portion 15a of the lid body 15 tapered because the diameter and volume of the gas phase portion Gp can be reduced.

Next, other embodiments of the present invention will be described with reference to FIGS. 5A and 5B. In the eleventh lid 15 of the double pressurized container shown in FIG. 2A, the boundary 15p between the tapered surface of the sealing part 15a and the tapered end surface is the fitting part, but in the pressurized product 11a shown in FIGS. 5A and 5, , an annular stepped portion 15p1 provided in the middle of the tapered surface of the lid body 15 constitutes a fitting portion. This annular step portion 15p1 has a triangular cross section and has an upper surface that is nearly vertical (cylindrical surface) and a lower surface that is nearly horizontal. In this double pressurized container, when the lid 15 is installed on the container body 16, the annular stepped portion 15p1 abuts and is held in line with the inner peripheral surface of the neck portion 14d (see FIG. 5A). Since the contact line of this annular stepped portion 15p1 is thin, the tip is easily melted by ultrasonic vibration, and a slight welded portion Y is formed (see FIG. 5B). Therefore, it is possible to further prevent the stock solution C from penetrating into the welded portion Y of the container.

Note that before welding, the tapered surfaces are not in close contact with each other because of the annular stepped portion 15p1. However, since the tapered portion 14d2 of the neck portion 14d of the inner container 14 is made thin, the tapered portion 14d2 is elastically deformed and strongly abuts. The part that deforms is the deformed part. Although there is a gap between the tapered surfaces, as the welding progresses, the tip of the annular stepped portion 15p1 melts, increasing the sealing performance.

In the pressurized product 11a shown in FIGS. 6A and 6B, the cylindrical portion 14d3 of the neck portion 14d of the inner container 14 is formed into a straight cylindrical shape, and the outer surface of the lower part of the sealing portion 15a of the lid body 15 is formed into a cylindrical shape. . The outer diameter of the lower part of the cylindrical lid body 15 (hereinafter referred to as the cylindrical portion 15a9) is made equal to or slightly larger than the inner diameter of the cylindrical portion 14d3 of the neck portion 14d. When the lid 15 is placed over the container body 16, the cylindrical portion 15a9 is guided to the cylindrical portion 14d3 by the tapered portion 14d2, and when the lid 15 is further pushed in, the tapered portion 14d2 extends slightly downward and the cylindrical portion 15a9 becomes the cylindrical portion. 14d3 and fits tightly. Since this fitted portion exhibits a strong sealing effect, the pressurizing agent P will not mix into the inner container 14 even if the pressurizing agent P is not filled while pressing the lid body 15 with a horn. This simplifies the gas filling process and welding process after attaching the lid, and reduces the burden on the horn.

In FIGS. 6A and 6B, a tapered portion 14d2 is provided on the neck portion 14d of the inner container 14, but since it does not provide a direct sealing effect, the tapered portion 14d2 can be omitted and the entire body can be made straight. Further, the tapered surface on the outer surface of the sealing portion 15a of the lid body 15 can also be omitted and made into a cylindrical shape. However, since it indirectly contributes to the sealing effect by elastically expanding and strengthening the fitting when the cylindrical portion 14d3 and the cylindrical portion 15a9 are fitted, it is preferable to provide it.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made within the scope of the invention. For example, in the embodiment described above, the lid 15 is welded to both the inner container 14 and the outer container 13, but it may be fixed to either one and simply sealed with an O-ring or the like. . Further, in the above embodiment, the inner container 14 and the outer container 13 are manufactured by blow molding at the same time, but they may be manufactured separately and then the inner container is housed inside the outer container. The inner container may be blow molded within the outer container. Although the cylindrical opening portion 27 is used in the above embodiment, it may be any other shape such as a prismatic shape or a rod shape.

Further, in the embodiments shown in FIGS. 5A and 5B, an annular stepped portion is provided on the outer circumferential surface of the sealing portion 15a of the lid 15, but conversely, an annular stepped portion is formed on the inner surface of the neck portion 14d of the inner container 14. It is also possible to construct a fitting part that provides a linear seal by an annular step. This annular stepped portion can also have a triangular cross-section having a nearly horizontal upper surface and a nearly vertical lower surface. This container is also substantially the same as the pressurized container 11a shown in FIGS. 5A and 5B, and has the same effects, namely, the sealing action prevents the pressurizing agent from entering the inner container and prevents the atomized stock solution from being deposited at the welding location. It has the effect of preventing the penetration of water.

In the embodiment described above, the neck portion 14d of the inner container 14 is provided with a tapered portion 14d2 whose diameter decreases downward, but the neck portion may have a cylindrical (straight) shape without a tapered portion. It is also possible to have a cylindrical neck whose diameter decreases stepwise at steps or the like. The outer peripheral surface of the sealing part of the lid should also be cylindrical without a tapered part, if a fitting part that forms a linear seal with the inner peripheral surface of the neck of the inner container can be obtained. It is also possible to create a shape that reduces the diameter in stages. Furthermore, a fitting portion may be provided between the cylindrical upper portion 14d1 of the neck portion 14 and the upper portion 15a2 of the sealing portion 15a of the lid body 15. In this case, the fitting portion can be provided regardless of the shape of the neck portion 14d of the inner container 14. Further, this fitting part can also be used in combination with the fitting part shown in FIG.

10 Discharge device 11 Double pressurized container 11a Pressurized product 12 Discharge member C Stock solution P Pressurizing agent 13 External container 13a Bottom portion 13a1 Ground surface 13a2 Dome portion 13b Body portion 13c Shoulder portion 13d Neck portion 13d1 Support portion 13e Male thread 13f Top of neck portion End face 13g Annular projection 14 Internal container Sc Stock solution storage chamber Sp Pressurizing agent storage chamber 14a Bottom 14a1 Recessed part 14a2 Dome part 14b Body part 14c Shoulder part 14d Neck part 14d1 Cylindrical upper part 14d2 Tapered part 14d3 Cylindrical part 14e Upper end surface 14f Flange 14g Annular protrusion 14h Horizontal groove 14i Vertical groove 15 Lid body 15a Sealing part 15a1 Fitting cylinder part 15a2 Upper part of sealing part 15a3 (Tapered) lower part of sealing part 15a4 Lower end 15a6 Connecting part 15a7 Slowly angled tapered surface 15a8 Tapered surface 15a9 Cylinder part 15b Flange 15c Bottom part 15d Closed part (unsealed part)
15d1 Pressure receiving part 15f Thin wall part (broken part)
15h Notch 15n Concave groove 15p Boundary (fitting part)
15p1 Annular stepped part (fitting part)
16 Container body 17 Annular disc part 17a Outer cylinder part 18 Valve holder 18a Valve holding part 18b Rubber retainer 18c Flange 18d (Stem passes through) Hole 20 Cap (installation part)
20a Upper base 20b Opening 21 Valve 22 Stem 23 Operation button 24 Housing 24a Lower surface 24b (of the housing) Bottom plate 24c (of the housing) Vertical hole 25 Spring 26 Stem rubber 27 Opening section 27a Bottom surface 27d (of the opening section) Reinforcing plate 28 Seal member Gp Gas phase part

Claims (9)

A container body consisting of an outer container and an inner container housed inside the container body, a lid body that closes the upper opening of the container body, a stock solution filled in the inner container, and a liquid solution filled between the outer container and the inner container. It consists of a pressure agent,
The outer container and the inner container are made of thermoplastic resin and each have a neck,
The lid body includes a cup-shaped sealing part inserted into the upper end opening of the neck of the inner container, and extending outward from the upper end of the sealing part, and applying ultrasonic waves to the upper end surfaces of the necks of the outer container and the inner container. a flange to be welded;
A fitting part is provided on one or both of the outer periphery of the sealing part and the neck part of the inner container, and the fitting part contacts annularly to perform a sealing action.
Pressurized products. The neck of the inner container has a tapered portion whose diameter decreases downward.
A pressurized product according to claim 1. 3. A tapered surface having substantially the same taper angle as that of the tapered portion of the inner container is provided on the outer periphery of the sealing portion, and the fitting portion is provided in the middle or at a corner of the lower end of the tapered surface. pressurized products. Pressure according to claim 3, wherein a tip tapered surface having a gentler angle than the tapered surface is provided at a lower part of the sealing portion, and a boundary between the tapered surface and the tip tapered surface is the fitting portion. product. The pressurized product according to any one of claims 1 to 3, wherein the fitting portion is an annular projection or an annular corner. A cylindrical part is provided at the lower part of the tapered part, and a cylindrical part having an outer diameter that is the same as or larger than the inner diameter of the cylindrical part is provided at the lower part of the sealing part, and the cylindrical part and the cylinder are provided at the lower part of the sealing part. 3. The pressurized product according to claim 2, wherein the fitting portions are fitted together to form the fitting portion. A fitting portion according to any one of claims 1 to 6, wherein a fitting portion is provided on the outer periphery of the sealing portion, and a deforming portion that is deformed by contacting the fitting portion is provided on the neck portion of the inner container. Pressure products. The lid body has a fitting cylinder part into which a discharge member having a valve is airtightly fitted, and an unsealed part that is opened by insertion of the discharge member is provided at the bottom of the fitting cylinder part. The pressurized product according to any one of claims 1 to 7. The pressurized product according to any one of claims 1 to 8, which is detachably attached to the upper end of the container body, is in liquid-tight and air-tight contact with the lid of the pressurized product, and is configured to prevent the undiluted solution in the inner container from being removed. A discharge device comprising a discharge member equipped with a valve for operating discharge/stop.

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