JP7635501B2 - Plug, double pressure container, discharge device - Google Patents

Description

The present invention relates to a plug, a double-pressurized container using this plug, and a discharge device using this double-pressurized container.

Patent Document 1 discloses a discharge device in which a discharge member is attached in a removable manner to a pressurized product in which the concentrate and pressurizing agent are filled in a container. With this discharge device, when the concentrate in the pressurized product runs out, the discharge member can be removed from the pressurized product and replaced with a new pressurized product. This discharge device also has a spike that pierces the internal container when the internal container shrinks and deforms, forming a discharge path for the pressurizing agent, so that the pressurizing agent can be discharged to the outside after the concentrate has been discharged.

JP 2020-19570 A

Incidentally, the discharge device of Patent Document 1 simply screws the discharge member into the container, so it is possible to remove the discharge member before the liquid is completely used up. If the discharge member is removed while the concentrate remains in the container, there is a risk that the concentrate will leak out forcefully due to the pressure of the pressurizing agent. In addition, because the spike is designed to form an exhaust path for the pressurizing agent, the pressurizing agent will also be exhausted forcefully after the concentrate leaks out, and there is a risk that the concentrate will be splashed over a wide area.

The technical objective of the present invention is to provide a stopper that can prevent the concentrate from leaking even if the discharge member is mistakenly removed, a double-pressurized container using this stopper, and a discharge device using this double-pressurized container.

The stoppers 30, 30A, 30B, and 30C of the present invention are stoppers housed in a double pressurized container 11 that includes an outer container 13 filled with a pressurizing agent P, an inner container 14 housed in the outer container 13 and filled with a concentrate C, and a lid 15 that seals the inner container 14 and is opened by attaching a discharge member 12 having a valve mechanism. They are characterized by having a sealing part 31 that moves downstream to come into contact with the lid 15 and close the flow path of the concentrate C, a pressed part 30b that comes into contact with the attached discharge member 12 and limits the downstream movement of the sealing part 31 to maintain the flow path of the concentrate C in an open state, and a perforation protrusion 30e that uses the contraction and deformation of the inner container 14 accompanying the discharge of the concentrate C to make a hole in the inner container 14.

The stoppers 30, 30A, 30B, and 30C preferably include a retaining plate 30c that receives the raw liquid C flowing from the upstream side to the downstream side and promotes the movement of the seal portion 31 downstream. The retaining plate 30c preferably includes a passage for ensuring a flow path for the raw liquid C. The stopper 30C preferably includes a valve member 40 having a seal portion 31 and a penetrating member 41 having a piercing projection 30e. The penetrating member 41 is preferably made of a synthetic resin containing glass fibers.

The double pressurized container 11 of the present invention is a double pressurized container comprising any one of the stoppers 30, 30A, 30B, 30C described above, an outer container 13 filled with a pressurizing agent P, an inner container 14 housed in the outer container 13 and filled with a concentrate C, and a lid 15 that seals the inner container 14 and is opened by attaching a discharge member 12 having a valve mechanism, and is characterized in that the lid 15 comprises a closing portion 15d that is opened by the discharge member 12 and a cylindrical portion 15a2 that extends upstream from the outer circumference of the closing portion 15d, and the stoppers 30, 30A, 30B, 30C are held in the cylindrical portion 15a2 in a state in which they can move freely upstream and downstream.

The discharge device 10 of the present invention is characterized by comprising the above-mentioned double pressurized container 11, the concentrate C filled in the inner container 14, the pressurizing agent P filled between the inner container 14 and the outer container 13, and a discharge member 12 detachably attached to the double pressurized container 11.

The stopper of the present invention can discharge the concentrate while the discharge member is attached, because the pressed portion abuts against the attached discharge member, and the flow path of the concentrate is maintained in an open state. On the other hand, if the discharge member is removed, the seal portion moves downstream and the flow path of the concentrate is closed. Therefore, even if the discharge member is removed by mistake, leakage of the concentrate can be suppressed. In addition, since leakage of the concentrate is suppressed when the discharge member is removed, the perforation protrusion does not open a hole in the internal container when the discharge member is removed, and even though the discharge member is provided with a perforation protrusion, the discharge of the pressurizing agent is suppressed when the discharge member is removed. Furthermore, when almost the entire amount of the concentrate is discharged and a hole is opened in the internal container by the perforation protrusion, the pressurizing agent is discharged to the outside from the flow path of the concentrate, which is maintained in an open state.

When the stopper is provided with a retaining plate that receives the concentrate flowing from the upstream side to the downstream side and encourages the seal part to move downstream, it can receive the concentrate that is about to leak out and encourage the seal part to move downstream, making it easier to prevent the concentrate from leaking when the discharge member is removed.

When the retaining plate has a passage for securing a flow path for the concentrate, the retaining plate does not impede the discharge of the concentrate. When the stopper is made of a valve member having a sealing portion and a penetrating member having a piercing protrusion, the valve member and the piercing protrusion can be made to have different hardnesses to enhance the sealing and penetrating functions. In addition, the one with higher hardness bites into the one with lower hardness, increasing the connecting force and preventing the penetrating member from falling off. When the penetrating member is made of a synthetic resin containing glass fibers, the glass fibers tend to be oriented toward the tip of the piercing protrusion, making it easier to pierce the internal container.

The double pressurized container and discharge device of the present invention has a lid that is opened by a discharge member, and a tubular portion that extends upstream from the outer periphery of the closure portion to form a flow path for the concentrate. The stopper is held in the tubular portion in a state in which it can move freely upstream and downstream, so that the stopper is easily moved by the concentrate flowing toward the opened closure portion, and the flow path for the concentrate can be quickly transitioned from an open state to a closed state when the discharge member is removed.

FIG. 1A is a cross-sectional view of a discharge device of the present invention, and FIG. 1B is a cross-sectional view of a container body used in the discharge device. 2A is a cross-sectional view of a main part of the discharge member of FIG. 1A, and FIG. 2B is a cross-sectional view of a main part of a pressurized product. 3A is a cross-sectional view of the plug, FIG. 3B is a plan view of the plug, FIG. 3C is a view looking up at the plug from below, and FIG. 3D is a plan view of the plug in which a through hole is provided instead of a notch. FIG. 4 is a cross-sectional view of a main part of the discharge device after it has been unsealed. FIG. 4 is a cross-sectional view of a main part of the discharge device with the cap loosened. 4 is a cross-sectional view of a main part of a discharge device, illustrating a state in which holes are perforated by a perforation protrusion. FIG. FIG. 11 is a cross-sectional view of another plug. 8 is a cross-sectional view of a main part of a discharge device using the plug shown in FIG. 7 after being unsealed. 8 is a cross-sectional view of a main part of a discharge device using the plug shown in FIG. 7 with the cap loosened. FIG. 8 is a cross-sectional view of a main part of a discharge device using the plug shown in FIG. 7, showing a state in which a hole is punched by a punching protrusion. FIG. FIG. 11A is a cross-sectional view, FIG. 11B is a plan view, and FIG. 11C is a view of the plug as viewed from below. 12 is a cross-sectional view of a main part of a discharge device using the plug shown in FIG. 11 after being unsealed. 12 is a cross-sectional view of a main part of a discharge device using the plug shown in FIG. 11 with the cap loosened. FIG. 12 is a cross-sectional view of a main part of a discharge device using the plug shown in FIG. 11 , showing a state in which a hole is punched by a punching protrusion. FIG. FIG. 15A is a front view of another plug, and FIG. 15B is an exploded perspective view. FIG. 16A is a plan view of the valve member used in the plug, and FIG. 16B is a front view. 17A is a plan view of a penetrating member used in the plug of FIG. 15A, FIG. 17B is a front view, FIG. 17C is a cross-sectional view taken along line XVII-XVII of FIG. 17B, and FIG. 17D is a view of the penetrating member as viewed from below. FIG. 16 is a cross-sectional view of a main part of the discharge device using the plug of FIG. 15 after being unsealed. FIG. 2 is a cross-sectional view of a main part of the discharge device with the cap loosened. 4 is a cross-sectional view of a main part showing a state in which holes are perforated by a perforation protrusion of the

The discharge device 10 shown in FIG. 1A is composed of a double pressurized container (container) 11, a discharge member 12, and the concentrate (contents) C and the pressurizing agent P filled in the double pressurized container 11. The double pressurized container 11 filled with the concentrate C and the pressurizing agent P is the pressurized product 11a. The pressurized product 11a and the discharge member 12 are sold as a set before assembly (see FIG. 1A), or in a semi-assembled, unopened state. The pressurized product 11a is sold together with the discharge member 12, and is also sold separately as a replacement. Therefore, the pressurized product 11a is sealed to prevent the concentrate C and the pressurizing agent P from leaking out until the discharge member 12 is attached (until it is opened by the discharge member 12). The discharge member 12 is also sometimes sold separately.

The double pressurized container 11 is composed of an outer container 13, a flexible inner container 14 housed therein, a lid (seal) 15 that seals the outer container 13 and the inner container 14, and a stopper 30 housed in the inner container 14. It does not have any valves or pumps. The combination of the outer container 13 and the inner container 14 forms the container body 16 (see Figure 1B). The inside of the inner container 14 is the concentrate storage chamber Sc that is filled with the concentrate C, and the space between the outer container 13 and the inner container 14 is the pressurized agent storage chamber Sp that is filled with the pressurized agent P. They are sealed by the lid 15. In other words, this double pressurized container 11 stores the concentrate C and the propellant P separately, and allows only the concentrate C to be discharged, thereby preventing leakage of the pressurized agent P such as compressed gas.

As shown in FIG. 1B, the outer container 13 is composed of a bottom 13a, a cylindrical body 13b, a shoulder 13c, and a cylindrical neck 13d. A male thread 13e is formed on the outer periphery of the neck 13d. The upper end surface 13f of the neck 13d is made substantially flat so that the lid 15 can be fixed. In this embodiment, the bottom 13a of the outer container 13 is provided with a ring-shaped ground surface 13a1 that protrudes downward and a dome portion 13a2 that protrudes upward in the center. This improves pressure resistance and impact resistance when dropped. Therefore, it is safe for distribution as a single item or delivery by home delivery. In addition, since it has the ground surface 13a1, it can be stably placed on a flat table or the like. However, it may have a spherical bottom surface.

As shown in FIG. 2B, an annular protrusion 13g is formed on the upper end surface 13f of the neck 13d of the outer container 13 to increase the contact pressure with the lid 15 during ultrasonic welding to facilitate melting and to create a welded portion for integrating the outer container with the lid 15. The annular protrusion may be provided on the lid 15 side, or on both. An annular support portion 13d1 is provided on the outer periphery of the neck 13d of the outer container 13 to suspend the outer container during transportation and welding.

Returning to FIG. 1B, the inner container 14, like the outer container 13, is composed of a bottom 14a, a body 14b, a shoulder 14c, and a neck 14d. The bottom 14a of the inner container 14 also has a downwardly protruding annular recess 14a1 and an upwardly protruding dome 14a2 at its center. This bottom 14a abuts against the bottom 13a of the outer container 13, and is supported so that the inner container 14 does not drop when filling with a pressurizing agent or when fixing the lid 15. As shown in FIG. 2B, the neck 14d is composed of a cylindrical upper portion 14d1, a tapered portion 14d2 that tapers downward, and a hanging portion 14d3 that extends downward from the lower end. The lower end of the hanging portion 14d3 is continuous with the shoulder 14c. That is, the tapered portion 14d2, the hanging portion 14d3, and the upper portion of the shoulder portion 14c of the neck portion 14d of the inner container 14 form a constricted portion. This constricted portion is shaped to be in close contact with the outer peripheral surface of the sealing portion 15a of the lid body 15 described below. Therefore, when the inner container 14 is filled with the concentrate C, the gas phase portion (head space) is small. There is a small gap between the outer surface of the upper portion 14d1 and the inner surface of the neck portion 13d of the outer container 13. The inner surface of the upper portion 14d1 is a smooth cylindrical surface.

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

The underside of the flange 14f of the internal container 14 has four radially extending horizontal grooves 14h formed at equal intervals for filling the pressurizing agent. Furthermore, the outer peripheral surface of the neck 14d of the internal container 14 has vertical grooves 14i that communicate with the horizontal grooves 14h. The vertical grooves 14i are provided in the upper portion 14d1, making it easier to fill the pressurizing agent P into the pressurizing agent storage chamber Sp.

In the inner container 14 configured as above, the body 14b is the thinnest (approximately 0.2 to 0.5 mm), the area near the outer periphery of the shoulder 14c and the bottom 14a are the next thinnest (approximately 0.3 to 2 mm), and the neck 14d is the thickest (approximately 1 to 3 mm).

Both the outer container 13 and the inner container 14 are made of a thermoplastic resin such as polyethylene terephthalate, polyethylene naphthalate, polyethylene, or polypropylene. They can be manufactured, for example, by placing a preform for the inner container inside a preform for the outer container and simultaneously blow molding the lower parts of the necks 13d and 14d. In particular, the injection blow molding method is preferred, in which a preform of a given shape is injection molded and then blow molded. In addition, by pushing the bottom 13a upward when molding the dome portion 13a2, the annular recessed portion 14a1 of the inner container can be stretched to increase its strength and reduce its weight.

The lid 15 is opened by attaching the discharge member 12. The lid 15 has a generally cylindrical sealing portion 15a inserted into the neck portion 14d of the inner container 14 and an annular flange 15b continuous with the upper end. The upper portion of the sealing portion 15a is generally cylindrical, and the lower portion 15a3 is tapered downward. However, it may be cylindrical from the upper portion to the lower portion. A fitting tube portion 15a1 is concentrically provided inside the sealing portion 15a. The fitting tube portion 15a1 rises upward from the center of the bottom of the sealing portion 15a and opens at the upper end. In addition, a cylindrical tube portion 15a2 is provided that protrudes below the sealing portion 15a so as to extend the fitting tube portion 15a1 downward. The tube portion 15a2 extends downward from the center of the bottom of the sealing portion 15a and opens at the lower end. Therefore, the tube portion 15a2 forms a part of the flow path of the concentrate C. However, because a closing portion 15d (described later) is interposed between the fitting cylinder portion 15a1 and the cylinder portion 15a2, the flow path does not function until the closing portion 15d is opened. An inner protrusion 15a7 is provided on the inner peripheral surface of the lower end of the cylinder portion 15a2 to hold the plug 30 to the lid 15.

In this lid 15, the lower end 15a4 of the lower part 15a3 is connected to the tubular part 15a2 extending downward from the fitting tubular part 15a1 by the connecting part 15a6. In addition, a bottom part 15c is provided near the lower end of the fitting tubular part 15a1 so as to close the part somewhat above the connecting part 15a6. Therefore, when a horn is pressed against the upper surface of the lid 15 to perform ultrasonic welding, the vibration of the horn passes through the sealing part 15a and easily flows from the lower end 15a4 to the concentrate C side. In addition, since the closing part 15d described later is located above the connecting part 15a6, the vibration is not easily transmitted to the closing part 15d. Therefore, dissolution or penetration of the weakened line 15f described later is prevented.

The bottom 15c is provided with a closed portion (openable portion) 15d having a pressure-receiving portion 15d1 that is thicker than the surrounding area. The closed portion 15d is usually circular in plan view. However, other shapes such as a rectangle can also be adopted. The periphery of the closed portion 15d is surrounded by a thin-walled portion (breakable portion, weakened line) 15f that is easily broken, such as an annular groove. The pressure-receiving portion 15d1 is provided on almost the entire upper surface of the closed portion 15d, and the thin-walled portion 15f is formed on the upper surface of the bottom 15c. The thin-walled portion 15f may be formed on the lower surface. The thin-walled portion 15f is, for example, a V-groove. The thin-walled portion 15f is continuous so that it can be torn off when the closed portion 15d is opened, but may be discontinuous as long as it can be broken. In order to prevent the closed portion 15d from falling off or becoming loose after opening, a reinforcing portion extending radially across the weakened line 15f may be provided. The cylindrical portion 15a2 extends downward toward the upstream side, surrounding the outer periphery of the closing portion 15d.

It is preferable that the outer peripheral surface of the sealing portion 15a is in a fitted state between the inner surface of the neck portion 14d of the inner container 14 so that air can be discharged from the inner container 14 when the lid 15 is attached to the neck portion 14d of the inner container, and the concentrate C in the inner container 14 can be liquid-sealed. The inner peripheral surface of the fitting cylinder portion 15a1 is tapered downward so that it comes into close contact with the seal member 28 of the valve 21 when the closing portion 15d is opened, preventing the concentrate C from leaking. However, it may also be cylindrical.

After the concentrate C and the pressurizing agent P are filled, the flange 15b of the lid 15 is welded to the top surface 13f of the neck 13d of the outer container 13 and the top surface 14e of the neck 14d of the inner container 14 by ultrasonic welding, laser welding, high-frequency welding, or other welding method, and sealed. In this embodiment, an annular protrusion 14g is formed on the top surface 14e of the inner container 14, and an annular protrusion 13g is also formed on the top surface 13f of the outer container 13, ensuring a reliable seal after welding. It may also be glued for the purpose of increasing airtightness, etc.

The bottom 15c of the fitting tube 15a1 is located slightly above the connecting portion 15a6 in order to increase the rigidity of the bottom 15c and make it easier to break the thin portion 15f. In addition, a reinforcing rib 15g is provided on the lower surface of the bottom 15c, specifically straddling the inner surface of the tube 15a2 and the lower surface of the bottom 15c, in order to increase the rigidity of the bottom 15c and ensure the breaking of the thin portion 15f. It is preferable that the reinforcing rib 15g is provided at multiple locations at equal angles so as to surround the weakened line 15f. The diameter of the fitting tube 15a1 is smaller than the diameter of the lower portion 15a3 of the sealing portion 15a in order to increase the molding accuracy of the inner surface of the fitting tube 15a1 and to reduce the area that receives internal pressure surrounded by the seal member 28 of the discharge member 12, thereby weakening the upward force applied to the lid body 15.

The flange 15b of the lid 15 consists of an annular disk portion 17 that expands radially outward from the upper end of the sealing portion 15a, and an outer tube 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 the portion that abuts against the upper end surface 14e of the neck portion 14d of the inner container 14 to form a welded portion and seal, and the lower surface of the outer tube portion 17a is the portion that abuts against the upper end surface 13f of the neck portion 13d of the outer container 13 to form a welded portion and seal. A notch 15b2 is formed on the outer periphery of the upper surface of the flange 15b to control the vibration transmission range during ultrasonic welding.

The material of the lid 15 is a thermoplastic resin that has high thermal bonding with the external container 13 and the internal container 14, and it is preferable to use the same material as the external container 13 and the internal container 14 to increase the welding strength. As shown in FIG. 1A, the lid 15 seals the concentrate storage chamber Sc and the pressurizing agent storage chamber Sp, and is attached to either the internal container 14 or the external container 13, or both, so that the contents (concentrate C, pressurizing agent P) can be stored safely and without leaking for a long period of time. The thin-walled portion 15f has a sufficient sealing function when unopened, and is shaped so that it can be easily broken.

Examples of concentrate C include skin products such as face washes, cleaning agents, bath additives, moisturizers, cleansing agents, sunscreens, lotions, shaving agents, depilatories, antiperspirants, germicides, and pest repellents, body products such as hair products such as treatment agents, styling agents, and hair dyes, foods such as whipped cream and olive oil, household products such as deodorants, fragrances, insecticides, insect repellents, pollen removers, germicides, and cleaning agents, and industrial products such as lubricants. However, the uses are not limited to these.

Preferably, the pressurizing agent P is a compressed gas such as nitrogen gas, compressed air, or carbon dioxide gas. It is preferable that the pressure inside the double pressurized container 11 is set to 0.1 to 1.0 MPa (gauge pressure, 25°C), and particularly 0.3 to 0.8 MPa (gauge pressure, 25°C) using the pressurizing agent. The capacity of the outer container 13 is preferably 30 to 500 ml. The capacity of the inner container (concentrate 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.

As described above, the double pressurized container 11 has a small number of parts and no valves or other operating parts, making it inexpensive to manufacture. It is also safe for consumers to carry and distributors to deliver. Furthermore, in the unlikely event that the outer container 13 cracks, only the pressurizing agent P will leak out, and the concentrate C in the inner container 14 will not leak out. This makes it even safer.

In addition, the pressurized product 11a has an outer container 13 and an inner container 14 made of synthetic resin, and the inner container 14 is surrounded by a pressurizing agent P, which is further surrounded by the outer container 13. This makes the pressurized product 11a highly elastic and less likely to break even if dropped. In addition, because the closing portion 15d is inside, there is less risk of the closing portion 15d being accidentally broken, making it even safer.

As shown in FIG. 1A, the discharge member 12 is composed of a cap (attachment part) 20 that screws into the male thread 13e of the neck part 13d of the outer container 13, a valve 21 covered by the cap 20, and an operating button 23 equipped with a discharge nozzle that is attached to the stem 22 of the valve 21.

As shown in FIG. 2A, the cap 20 is a cylinder with a bottom and has an upper base 20a. An internal thread 20c is formed on the inner peripheral surface of the cap 20 to screw into the external thread 13e of the outer container 13. An opening 20b is formed in the center of the upper base 20a of the cap 20, through which the stem 22 passes and through which the base of the operating button 23 passes. The cap 20 and the valve 21 without the operating button 23 attached are treated as a valve unit or valve assembly.

The valve 21 is covered by a cap 20. The valve 21 is made up of a cylindrical housing 24 with a bottom, the above-mentioned stem 22 housed inside the housing 24 so as to be movable up and down, a spring 25 that urges the stem 22 upward, a stem rubber 26, and a valve holder 18 equipped with a cylindrical valve holding portion 18a that holds the upper portion of the housing 24, and constitutes a discharge passage for the concentrate C. The stem 22, the spring 25, and the stem rubber 26 constitute a valve mechanism B that switches between a discharge state and a non-discharge state of the concentrate C, and this valve mechanism B is housed in a housing portion 24a provided inside the housing 24. The valve holder 18 covers the housing portion 24a and prevents the valve mechanism B from coming out of the housing 24.

The lower end of the housing 24 is provided with an opening section 27 for opening the closing section 15d. The bottom surface 27a of the opening section 27 is flattened so as to abut against the upper surface of the pressure-receiving section 15d1. It has a diameter equal to or slightly smaller than the diameter of the area surrounded by the thin-walled section 15f. A sealing member 28 such as an O-ring is attached to the outer periphery of the lower part of the housing 24. This sealing member 28 seals between the inner periphery of the fitting cylinder section 15a1 of the lid body 15 and the housing 24 during and after opening.

The housing 24 has a vertical hole 24c that penetrates the bottom plate 24b of the housing 24 from top to bottom as a passage that connects the valve housing section 24a inside the housing 24 to the concentrate housing chamber Sc in the internal container 14. The planar shape of the vertical hole 24c can be, for example, approximately fan-shaped. It is preferable to provide multiple vertical holes 24c. In this way, even if one vertical hole 24c is blocked, communication can be maintained through the other vertical holes 24c.

The height position of the bottom surface 27a of the opening portion 27 is a position where it comes into contact with the pressure-receiving portion 15d1 when the cap 20 is screwed onto the male thread 13e of the outer container 13 once or twice. Therefore, at the time of shipment or distribution, the cap 20 can be loosely screwed on to prevent the closing portion 15d from breaking, and the discharge member 12 and the double pressurized container 11 can be temporarily joined in a sealed state.

As shown in FIG. 2A, the valve holder 18 has a valve holding portion 18a, an annular rubber retainer 18b that extends inward from the upper end of the valve holding portion 18a, and a flange 18c that extends outward. A hole 18d is formed in the center of the rubber retainer 18b through which the stem 22 passes.

As shown in FIG. 2B, the plug 30 is held in the tubular portion 15a2 of the lid 15 upstream of the closing portion 15d of the lid 15 in a state in which it can move freely upstream and downstream.

As shown in FIG. 3, the plug 30 includes a base 30a that serves as the axis, a pressed portion 30b that extends upward from the upper end of the base 30a, a retaining plate 30c that extends horizontally from the upper end of the base 30a, a base portion 30d that extends horizontally from the lower end of the base 30a, a perforation projection 30e that extends downward from the lower surface of the base portion 30d, and a sealing plate 30f that extends horizontally from between the retaining plate 30c and the base portion 30d. Each part is integrated so that the relative positions of the parts do not shift. Note that "integrated" includes parts that are integrally molded as well as parts that are assembled so that the relative positions of the parts do not shift.

The base 30a is tapered so that the outer diameter increases downward. The inside is hollow and the lower end is open. However, it does not have to be hollow.

The pressed portion 30b is cylindrical and is located on the central axis of the base portion 30a. This pressed portion 30b is located inside the cylindrical portion 15a2 of the lid body 15, and is pressed from above by the opening portion 27 when the discharge member 12 is attached to the pressurized product 11a.

The retaining plate 30c is located in the tube portion 15a2 of the lid body 15, and the inner protrusion 15a7 prevents the stopper body 30 from coming out of the tube portion 15a2. Therefore, the stopper body 30 can move up and down relative to the lid body 15, but will not fall off the lid body 15. The retaining plate 30c also serves as a sail to receive the raw liquid C flowing toward the fitting tube portion 15a1 through the unsealed closing portion 15d from the tube portion 15a2 and move the stopper body 30 upward. In other words, the retaining plate 30c also serves to receive the raw liquid C flowing from the upstream side to the downstream side and promote the movement of the sealing plate 30f (sealing portion 31 described later) to the downstream side. The planar shape of this retaining plate 30c is approximately circular. However, in order to secure a flow path for the raw liquid C between the inner peripheral surface of the cylindrical tube portion 15a2, a cutout portion 30c1 is provided in part, which is different from the inner peripheral surface shape (horizontal cross-sectional shape) of the tube portion 15a2. In addition, instead of the cutout 30c1, a through hole 30c2 may be provided as shown in FIG. 3D. The point is that a passage through which the concentrate C can pass is provided.

The planar shape of the base portion 30d is approximately annular. The base portion 30d prevents deformation due to the shrinking internal container, stabilizes the position of the piercing protrusions 30e, and ensures that the internal container can be pierced. However, it does not necessarily have to be approximately annular, and can be changed as appropriate to match the shape and arrangement of the piercing protrusions 30e provided below.

The piercing projection 30e is a pointed tip that points downward. A number of piercing projections 30e are provided at positions horizontally spaced apart from the central axis of the base 30a. When the plug 30 is placed in the internal container 14, it is offset from the central axis of the internal container 14. As a result, when the body 14b of the internal container 14 shrinks and deforms toward the shoulder 14c, the piercing projections 30e come into contact with the thin body 14b, making it easier to pierce. (The parts of the body 14b of the internal container 14 on the central axis tend to overlap irregularly, so it is difficult to make a hole when the piercing projection 30e is on the central axis.)

The planar shape of the sealing plate 30f is approximately circular, and its outer diameter is larger than the inner diameter of the cylindrical portion 15a2. The lower end of the cylindrical portion 15a2 and the upper surface of the sealing plate 30f are both flat. Therefore, when the upper surface of the sealing plate 30f abuts against the lower end of the cylindrical portion 15a2, a seal is formed, and the inflow of the concentrate C into the cylindrical portion 15a2 is prevented. That is, the upper surface of the sealing plate 30f becomes the sealing portion 31. The vertical length L1 (see FIG. 3A) from the upper surface of the sealing plate 30f to the upper end of the pressed portion 30b is larger than the vertical length L2 (see FIG. 4) from the lower end of the cylindrical portion 15a2 to the lower end of the discharge member 12 (bottom surface 27a of the opening portion 27) when the discharge member 12 is completely attached to the pressurized product 11a (with the lid body 15 opened by the discharge member 12). Therefore, when the discharge member 12 breaks through the closing portion 15d of the lid, the opening portion 27 presses the pressed portion 30b downward, forming a gap S between the lower end of the tube portion 15a2 and the upper surface of the sealing plate 30f through which the concentrate C can flow.

In the plug 30 configured as described above, at least the pressed portion 30b and the retaining plate 30c are housed in the cylindrical portion 15a2. When the pressurized product 11a is unopened, the periphery of the retaining plate 30c is caught on the inner protrusion 15a7, and it is in a state of being suspended from the lid 15.

The material of the stopper 30 is preferably a thermoplastic resin such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyethylene, or polypropylene. It is also preferable that the outer container 13, the inner container 14, and the stopper 30 are all made of the same material. In this case, if the discharge member 12 is removed after use, it can be recycled or disposed of as is. However, different materials may be used. For example, if the stopper 30 is made of a hard synthetic resin such as polyphenylene sulfide or a metal such as stainless steel, it is easier to pierce with the piercing projection 30e.

Next, the attachment of the discharge member 12 to the pressurized product 11a will be described. When a user uses the discharge device 10 that he or she has purchased, the user first screws the cap 20 onto the male thread 13e of the external container 13. This causes the entire cap 20 and the valve 21 to descend, and the bottom surface 27a of the opening portion 27 presses down (pushes downward) the closing portion 15d. This breaks the thin-walled portion 15f, and the closing portion 15d is torn off from the fitting tubular portion 15a1 and separated from the bottom portion 15c and falls off. The fallen closing portion 15d remains in the tubular portion 15a2. As the closing portion 15d falls off, the fitting tubular portion 15a1 communicates with the concentrate storage chamber Sc in the container body 16 (see Figure 4).

In addition, since the cap 20 is screwed to the outer 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 portion 27 gradually presses the pressure-receiving portion 15d1 of the closing portion 15d. Since the lid body 15 is made of synthetic resin, when it is gradually pressed, the closing portion 15d is likely to stretch due to its extensibility and is not likely to break. However, since the closing portion 15d is surrounded by the annular thin-walled portion 15f and the pressure-receiving portion 15d1 protrudes, the stress concentration on the thin-walled portion 15f increases, allowing it to break smoothly. In addition, since the bottom surface 27a of the opening portion 27 is flat, it is not likely to deform due to the opening operation, and the discharge member 12 can be used repeatedly.

The closing portion 15d has a thick, approximately circular pressure-receiving portion 15d1 at the top, which is provided on the central axis of the lid body 15, and is in contact with the circular bottom surface 27a of the opening portion 27. When pressure is applied by the bottom surface 27a, the closing portion 15d is pushed straight in and breaks along the thin-walled portion 15f, and the broken closing portion 15d falls off and falls between the tube portion 15a2 and the retaining plate 30c. However, the pressure-receiving portion 15d1 or the bottom surface 27a of the opening portion 27 may be inclined so that the thin-walled portion 15f breaks in sequence from one side to the other. Also, the closing portion 15d may not fall off and remain connected via the thin-walled portion 15f, etc.

When the closing portion 15d is broken, the concentrate C may leak from the gap between the inner circumference of the bottom portion 15c and the outer circumference of the opening portion 27. However, since the fitting tube portion 15a1 and the housing 24 are sealed with the sealing member 28, the concentrate C remains inside the fitting tube portion 15a1 and does not leak to the outside. In addition, the reaction force at the time of breaking and the internal pressure after breaking act to push up the housing 24, but the cap 20 and the external container 13 are screwed together, and the upper base 20a of the cap 20 and the valve holder 18 provide double support, so 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. In addition, deformation of the upper base 20a of the cap 20 is prevented.

When the pressurized product 11a is opened and the user presses the operation button 23 attached to the stem 22, the stem 22 descends, the stem rubber 26 bends, and the stem hole opens. The raw liquid C in the raw liquid storage chamber Sc is pressurized by the pressurizing agent P through the internal container 14, so it is discharged to the outside via the tube portion 15a2, the opened bottom portion 15c, the housing 24, the stem 22, and the operation button 23. At this time, the raw liquid C flows in the upward direction, which is the downstream side, and the force is received by the retaining plate 30c, so the stopper body 30 moves upward, which is the downstream side. However, after moving upward to a certain extent, the pressed portion 30b abuts against the opening portion 27 inside the lid body 15, and further movement is restricted. Therefore, a gap S is formed between the upper surface of the sealing plate 30f and the lower end of the tube portion 15a2, and the flow path of the raw liquid C is maintained in an open state. The pressurizing agent storage chamber Sp, which is filled with the pressurizing agent P, is closed by a lid 15 and is not connected to the outside or the concentrate storage chamber Sc, so the pressurizing agent P will not leak to the outside when the discharge operation is performed.

When the operation button 23 is released, the stem 22 rises and the discharge of the concentrate C stops. When the discharge of the concentrate C stops, the upward force no longer acts on the retaining plate 30c, and depending on the viscosity and specific gravity of the concentrate C, the stopper 30 moves downward, which is the upstream side, and the retaining plate 30c comes into contact with the inner protrusion 15a7, and the stopper is again suspended.

By the way, the discharge member 12 can be easily removed from the pressurized product 11a by turning the cap 20 in the opposite direction to the screwing direction. When the cap 20 is turned, the cap 20 and the valve 21 rise, as shown in Figure 5. When the sealing member 28 is removed from the fitting tubular portion 15a1, the seal is released and the concentrate C tries to leak out from the fitting tubular portion 15a1 to the outside. In addition, even when the seal member 28 is simply removed, the concentrate C flows from the internal container 14 into the fitting tubular portion 15a1. At this time, the concentrate C flows upward, but the force is received by the retaining plate 30c, so the stopper 30 moves upward. When the discharge member 12 is attached, the unsealing portion 27 restricts the rise of the stopper body 30, so the flow path of the concentrate C is kept open. However, when the discharge member 12 is removed (moved up), the unsealing portion 27 does not exist, so the stopper body 30 rises until the upper surface (sealing portion 31) of the sealing plate 30f abuts against the lower end of the tube portion 15a2. As a result, the sealing plate and the tube portion abut tightly to form a seal, the flow path of the concentrate C in the lid body 15 is closed, and the leakage of the concentrate C is suppressed.

When the cap 20 (dispensing member 12) is attached again, the opening portion 27 presses the pressed portion 30b downward, and the gap S is formed again between the sealing plate 30f and the tube portion 15a2. In this state, the concentrate C can be dispensed by operating the valve 21.

When the stock solution C decreases, the inner container 14 shrinks and deforms. The deformed shape shrinks mainly in the left-right direction as the inner surfaces of the thinner body 14b come into contact with each other. When the inner surfaces of the body 14b come into contact with each other, the body 14b moves upward so as to reduce the stock solution C remaining from the shoulder 14c to the neck 14d. At this time, as shown in FIG. 6, the body 14b that has moved upward comes into contact with the piercing protrusion 30e and opens a hole. This hole then becomes a discharge path for the pressurizing agent P, and the pressurizing agent P flows into the inner container 14. The pressurizing agent P that has flowed in is discharged to the outside by discharging the valve 21. The user can notice that the pressurizing agent P has been discharged when it is no longer in use. If the discharge member 12 is removed from the pressurized product 11a without fully discharging the pressurizing agent P, the stopper 30 moves upward in response to the pressurizing agent P flowing upward, and the cylinder portion 15a2 comes into contact with the seal plate 30f, preventing the pressurizing agent P from leaking out.

In this way, the stopper 30 has a seal portion 31 that maintains the flow path of the stock solution C open when the discharge member 12 is attached, and closes the flow path of the stock solution C when the discharge member 12 is removed, so that the stock solution C can be discharged while the discharge member 12 is attached. On the other hand, if the discharge member 12 is removed, the seal portion 31 moves downstream and the flow path of the stock solution C is closed. Therefore, even if the discharge member 12 is removed by mistake, leakage of the stock solution C can be suppressed. In addition, the stopper 30 has a perforation protrusion 30e that uses the contraction deformation of the internal container 14 accompanying the discharge of the stock solution C to open a hole in the internal container 14, so that a discharge path for the pressurizing agent P can be formed at the stage when the discharge of the stock solution C is completed, and the pressurizing agent P can be discharged to the outside.

The discharge member 12 is detachably attached to the double pressurized container 11 of the pressurized product 11a by the cap 20. Therefore, after the concentrate C has been discharged, the discharge member 12 can be removed from the pressurized product 11a and attached to a new pressurized product 11a.

Figure 7 shows another plug 30A. In this plug 30A, unlike the plug 30 in Figure 3, there is no seal plate 30f. Instead, the upper surface of the retaining plate 30c functions as the seal portion 31. In this state, it can be said that the retaining plate 30c also serves as the seal plate 30f. To explain in detail, as shown in Figure 8, a circular step portion 15a8 is provided on the inner surface side of the cylindrical body 15a2, which continues in the circumferential direction, and a seal is formed when the upper surface of the retaining plate 30c abuts against the lower surface of the circular step portion 15a8. The diameter of the inner edge of the circular step portion 15a8 is smaller than the diameter of the inscribed circle of the cutout portion 30c1 provided in the retaining plate 30c. Therefore, when the upper surface of the retaining plate 30c abuts against the lower surface of the circular step portion 15a8, the cutout portion 30c1 is automatically blocked.

7 and 8, the vertical length L3 from the upper surface of the holding plate 30c of the plug 30A to the upper end of the pressed portion 30b is greater than the vertical length L4 from the lower surface of the annular step 15a8 to the lower end of the discharge member 12 (bottom surface 27a of the unsealing portion 27) when the discharge member 12 is completely attached to the pressurized product 11a (when the lid 15 is unsealed by the discharge member 12). Therefore, when the discharge member 12 breaks through the closing portion 15d of the lid, the unsealing portion 27 presses the pressed portion 30b downward, forming a gap S for flowing the concentrate C between the lower surface of the annular step 15a8 and the upper surface of the holding plate 30c. This gap S continues to be formed as long as the discharge member 12 does not move upward. In other words, the flow path of the concentrate C remains open. In this state, by pressing down the stem 22, the concentrate C can be discharged to the outside through the discharge member 12.

As shown in FIG. 9, when the pressurized product 11a is opened and the cap 20 is turned in the opposite direction to the screwing direction to remove the discharge member 12 from the pressurized product 11a, the concentrate C in the internal container 14 flows into the downstream fitting tube portion 15a1. This flow is received by the retaining plate 30c, causing the stopper body 30A to rise and the upper surface of the retaining plate 30c, which is the seal portion 31, to abut against the lower surface of the annular step portion 15a8. As a result, the flow path of the concentrate C is closed, and leakage of the concentrate C when the discharge member 12 is removed from the pressurizing agent 11a is suppressed. The closed state of the flow path of the concentrate C can be resolved by reattaching the discharge member 12 to the pressurized product 11a.

As shown in FIG. 10, when the stock solution C decreases, the internal container 14 contracts and deforms, and the body 14b moves upward. Then, a hole is made by the piercing projection 30e, and the pressurizing agent P enters the internal container 14 through the hole. In this state, by pressing down the stem 22, the pressurizing agent P is discharged to the outside through the discharge member 12.

In this way, even with the plug 30A in FIG. 7, which does not include the sealing plate 30f, the same effect can be achieved as with the plug 30 in FIG. 3. Note that the other configurations are the same as those of the discharge device 10 shown in FIGS. 1 to 6, so a description thereof will be omitted.

Figure 11 shows yet another plug 30B. This plug 30B does not have a base portion 30d, as compared to the plug 30 in Figure 3. Instead, a piercing projection 30e extends from the underside of the sealing plate 30f. In this state, it can be said that the sealing plate 30f also serves as the base portion 30d. The sealing portion 31 is the upper surface of the sealing plate 30f.

As shown in FIG. 12, when the discharge member 12 breaks through the closing portion 15d of the lid, the opening portion 27 presses the pressed portion 30b downward, forming a gap S for allowing the concentrate C to flow between the lower end of the tube portion 15a2 and the upper surface of the sealing plate 30f. This gap S remains formed as long as the discharge member 12 does not move upward. In other words, the flow path of the concentrate C remains open. In this state, by pressing down the stem 22, the concentrate C can be discharged to the outside through the discharge member 12.

As shown in FIG. 13, when the pressurized product 11a is opened and the cap 20 is turned in the opposite direction to the screwing direction to remove the discharge member 12 from the pressurized product 11a, the concentrate C in the internal container 14 flows into the downstream fitting tube portion 15a1. This flow is received by the retaining plate 30c, causing the stopper body 30B to rise and the upper surface of the sealing plate 30f, which is the sealing portion 31, to abut against the lower end of the tube portion 15a2. As a result, the flow path of the concentrate C is closed, and leakage of the concentrate C when the discharge member 12 is removed from the pressurizing agent 11a is suppressed. The closed state of the flow path of the concentrate C can be resolved by reattaching the discharge member 12 to the pressurized product 11a.

As shown in FIG. 14, when the stock solution C decreases, the internal container 14 shrinks and deforms, and the body 14b moves upward. Then, a hole is made by the piercing projection 30e, and the pressurizing agent P enters the internal container 14 through the hole. In this state, by pushing down the stem 22, the pressurizing agent P is discharged to the outside through the discharge member 12. As a result of omitting the base portion 30d, this stopper 30B has a shorter vertical length than the other stoppers 30 and 30A. Therefore, the internal container 14 can be sufficiently shrunk before the hole is made, and the remaining amount of stock solution C can be reduced.

In this way, even with the plug 30B in FIG. 11, which does not include the base portion 30d, the same effect can be achieved as with the plug 30 in FIG. 3 or the plug 30A in FIG. 7. Note that other configurations are similar to those of the discharge device 10 shown in FIGS. 1 to 6 and the discharge device 10 shown in FIGS. 7 to 10, and therefore will not be described.

Figure 15A shows yet another plug 30C. As shown in Figure 15B, this plug 30C is manufactured by separately forming a valve member 40 above the sealing plate 30f and a penetrating member 41 below it, which are then integrated together. The valve member 40 is preferably made of the same material as the plug 30 in Figure 3, such as a thermoplastic resin such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyethylene, or polypropylene, and is particularly preferably made of a synthetic resin that provides a high seal when it comes into contact with the cylindrical portion 15a2 of the lid.

On the other hand, the penetrating member 41 may be molded from the same material as the valve member 40, but it is preferable to use a material with a high degree of polymerization of the monomer to increase the hardness. It may also be molded from a material different from that of the valve member 40, and in particular, in order to increase the ability to pierce the internal container 14 (see FIG. 18), it is preferable to manufacture it from a material having a higher hardness than the internal container 14, such as a synthetic resin containing glass fiber. The glass fiber content is preferably 10 to 60% by mass, and more preferably 20 to 50% by mass. The synthetic resin is preferably a thermoplastic resin such as polyamide, polyethylene terephthalate, polybutylene terephthalate, or polyphenylene sulfide.

As shown in Figures 16A and 16B, the valve member 40 is composed of a base 40a, a retaining plate 30c extending horizontally from the upper end of the base 40a, a pressed portion 30b extending upward from the center of the upper surface of the retaining plate 30c, a sealing plate 30f extending horizontally from the lower end of the base 40a, and a fitting protrusion 40b extending downward from the center of the lower surface of the sealing plate 30f. The cross section of the base 40a is cross-shaped in a plan view and extends vertically to ensure rigidity and ease of molding. In addition, because the lower surface of the sealing plate 30f is blocked by the fitting protrusion 40b, it is not possible to form a cavity in the center as in the plug 30 in Figure 3. In addition to being cross-shaped, the base 40a can also be star-shaped with five to six or three ribs arranged radially. The side portions of the multiple ribs prevent the stopper 30C from tilting when it moves up and down inside the tubular portion 15a2 of the lid, making it easier for the seal plate 30f to come into even contact with the underside of the tubular portion 15a2 and ensuring a reliable seal. Furthermore, the base 40a can also be formed from a central cylindrical or rectangular column portion and multiple ribs that extend radially around it.

The retaining plate 30c is disc-shaped and has four notches 30c1 around its periphery to ensure a flow path for the concentrate. The pressed portion 30b is roughly cylindrical. The sealing plate 30f is disc-shaped and has a smooth upper surface as the sealing portion 31. These are basically the same as the upper portion of the plug 30 in FIG. 3. The fitting projection 40b is roughly cylindrical, and around the lower portion is an annular engaging claw 40c that prevents it from coming loose when fitted into the fitting hole 41b of the penetrating member 41.

As shown in Figures 17A to 17D, the penetrating member 41 consists of a base 41a, a base portion 30d extending horizontally from the lower end of the base 41a, and a piercing projection 30e projecting downward from the lower surface of the base portion 30d. The base 41a consists of a cylindrical portion 41a1 and five ribs 41a2 arranged around it. The cylindrical portion 41a1 has the aforementioned fitting hole 41b into which the fitting projection 40b of the valve member 40 fits, and an engagement piece 41c that engages with the engagement claw 40c of the fitting projection 40b is formed on the inner surface of the upper part of the fitting hole 41b (see Figure 17C). The number of ribs 41a2 may be three to four, or six or more. The provision of the ribs 41a increases the rigidity, especially the rigidity when piercing the inner container 14 (see Figure 20).

Two piercing projections 30e are provided at positions horizontally away from the central axis of the base 30d, protruding downward. In this embodiment, two piercing projections 30e are provided by forming V-shaped notches 30e2 at the opposing corners of a rectangular tube 30e1 that is rhombic in plan view. It can also be interpreted as a pair of members with V-shaped or L-shaped cross sections with inclined surfaces at the lower ends, which are combined so that the corners face outward. In this form, the pointed head, which is a triangular pyramid with three faces gathered at acute angles, is supported by two or four plates, so that the rigidity of the piercing projections 30e is high, and the sharp pointed head makes it easy to pierce the internal container 14. The notches 30e2 can be formed in three places (n places) of a cylindrical member with a hexagonal cross section (or a 2n-sided cross section), or it can be formed by combining three or more V-shaped or L-shaped cross sections.

When the penetrating member 41 is made of a synthetic resin containing glass fibers, it has high strength and rigidity. Furthermore, it is easy to form the tip and ridge of the perforation projection 30e in a sharp shape. When synthetic resin containing glass fibers is injection molded, the synthetic resin and glass fibers are oriented in the flow direction in the mold, increasing its strength. Furthermore, when the ends of the glass fibers appear on the outer surface, friction with the internal container increases, making it easier to perforate or cut open. Therefore, when the penetrating member 41 is injection molded, it is preferable to design the mold and injection port so that the up and down direction of the plug body 30C is the flow direction of the molten resin.

If the synthetic resin material constituting the penetrating member 41 and the synthetic resin material constituting the valve member 40 are different and one has a higher hardness than the other, when the fitting protrusion 40b is fitted into the fitting hole 41b, the side with the lower hardness can be deformed to fit tightly. This increases the connecting force between the valve member 40 and the penetrating member 41, and even if a relatively heavy penetrating member 41 made of a resin containing glass fibers is used, the penetrating member 41 can be prevented from falling off the valve member 40. For example, if the hardness of the penetrating member 41 is higher than that of the valve member 40, the fitting protrusion 40b will be elastically deformed when it is fitted into the fitting hole 41b, and the restoring force will strengthen the connecting force with the fitting hole 41b.

The stopper 30C in Fig. 15A and B is attached to the double pressurized container 11 shown in Fig. 1A in the same manner as the stopper 30 in Fig. 2B. That is, as shown in Fig. 18, the pressed portion 30b and the holding plate 30c of the stopper 30C are inserted into the cylindrical portion 15a2 of the lid 15, and the holding plate 30c is engaged with the inner projection 15a7 of the cylindrical portion 15a2. As a result, the stopper 30C is suspended by the lid 15. Since the stopper 30C is relatively heavy, it does not stop halfway inside the cylindrical portion 15a2, but is caught by the inner projection 15a7 at the lower end and stops. When the discharge member 12 is attached to the outer container 13 in this state, the opening portion 27 of the discharge member 12 causes the closing portion 15d to fall off. As a result, the inside of the inner container 14 and the inside of the housing 24 are connected.

In this state, the concentrate C can be discharged by operating the stem 22. When the concentrate C is being discharged, the retaining plate 30c is pushed up by the flow of the concentrate C, but the pressed portion 30b abuts against the opening portion 27, so the flow path of the concentrate C is maintained in an open state. When the operation of the stem 22 is stopped, the stopper 30C is again suspended by the lid 15. This repetition is the normal state of use.

As shown in FIG. 19, if the user mistakenly attempts to remove the discharge member 12 while the pressurized product 11a is opened, the concentrate C in the internal container 14 flows into the fitting tube portion 15a1. However, this flow is received by the retaining plate 30c, causing the stopper body 30A to rise and the upper surface of the sealing plate 30f, which is the sealing portion 31, to abut against the lower end of the tube portion 15a2. As a result, the flow path of the concentrate C is closed, and the outflow of the concentrate C is suppressed. The closed state of the flow path of the concentrate C can be resolved by reattaching the discharge member 12 to the pressurized product 11a.

As shown in FIG. 20, when the stock solution C decreases, the internal container 14 contracts and deforms, and the body 14b moves upward. A hole is then made by the piercing projection 30e. In this embodiment, the strength and rigidity of the stopper 30C are high, so the piercing or tearing is relatively reliable, and the pressurizing agent P enters the internal container 14 through the hole. In this state, by pressing down the stem 22, the pressurizing agent P is discharged to the outside through the discharge member 12.

In this way, the plug 30C in Figs. 15A and 15B achieves the same effect as the plug 30 in Fig. 3. The rest of the configuration is the same as that of the discharge device 10 shown in Figs. 1 to 6, so a description thereof will be omitted.

Although the 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, the pressed portion 30b and the opening portion 27 of the discharge member 12 are in direct contact with each other, but they may be indirectly in contact with each other via the closing portion 15d or the like. In addition, a trigger-operated operation button with a lever can be used instead of the push-down operation button 23. In the above embodiment, the lid body 15 is welded to both the inner container 14 and the outer container 13, but it may be fixed to one of them and simply sealed with an O-ring or the like with the other. In addition to ultrasonic welding, heat welding using high frequency or laser, adhesion using an adhesive, etc. may be used. In the above embodiment, the inner container 14 and the outer container 13 are manufactured by blow molding at the same time, but the inner container may be blow molded inside the molded outer container. The outer container may be made of metal such as aluminum or tinplate.

In the above embodiment, the discharge member 12 with the valve is attached to the pressurized product 11a by rotating the cap 20, but it may be attached by engagement, crimping, or the like. Furthermore, it may be adopted as a structure for perforating the inner container in a conventional dual aerosol product with a valve.

In the stopper 30C of FIG. 15A, the valve member 40 and the penetrating member 41 are connected by fitting, but they can also be joined by adhesion or welding, or molded integrally by injection molding one of them with molten resin while the other is set in a mold. Furthermore, it is also possible to use only the valve member 40 without using the penetrating member 41. In this case, it can also be used for a single-layer container that does not use an inner container.

10 Discharge device 11 Double pressurized container 11a Pressurized product 12 Discharge member C Raw liquid P Pressurizing agent 13 Outer container 13a Bottom 13a1 Ground surface 13a2 Dome portion 13b Body portion 13c Shoulder portion 13d Neck portion 13d1 Support portion 13e Male thread 13f Upper end surface 13g of neck portion Annular protrusion 14 Inner container Sc Raw liquid storage chamber Sp Pressurizing agent storage chamber 14a Bottom 14a1 Depression portion 14a2 Dome portion 14b Body portion 14c Shoulder portion 14d Neck portion 14d1 Upper portion 14d2 Tapered portion 14d3 Hanging portion 14e Upper end surface 14f Flange 14g Annular protrusion 14h Horizontal groove 14i Vertical groove 15 Lid body 15a Sealing portion 15a1 Fitting cylindrical portion 15a2 Cylindrical portion 15a3 Lower portion 15a4, lower end 15a6, connecting portion 15a7, inner protrusion 15a8, annular step portion 15b, flange 15b2, notch 15c, bottom portion 15d, closing portion 15d1, pressure receiving portion 15f, thin portion (fracture portion)
15g Reinforcing rib 16 Container body 17 Annular disk portion 17a Outer cylinder portion 18 Valve holder 18a Valve holding portion 18b Rubber retainer 18c Flange 18d (Stem passing) hole 20 Cap (mounting portion)
20a Upper base 20b Opening 20c Female screw 21 Valve 22 Stem 23 Operation button 24 Housing 24a Storage section 24b Bottom plate 24c Vertical hole 25 Spring 26 Stem rubber 27 Opening section 27a Bottom surface (of opening section) 28 Sealing member B Valve mechanism 30, 30A, 30B, 30C Plug body 30a Base 30b Pressed section 30c Retaining plate 30c1 Notch 30c2 Through hole 30d Base section 30e Perforation protrusion 30e1 Square tube 30e2 Notch 30f Sealing plate 31 Sealing section L1 Vertical length L2 from the top surface of the sealing plate to the top end of the pressed section Vertical length L3 from the bottom end of the tube section to the bottom end of the discharge member Vertical length L4 from the top surface of the retaining plate to the top end of the pressed section The length S in the vertical direction from the lower surface of the annular step portion to the lower end of the discharge member, the gap 40 between the lid body and the seal portion, the valve member 40a, the base portion 40b, the fitting projection 40c, the engagement claw 41, the penetrating member 41a, the base portion 41a1, the cylindrical portion 41a2, the rib 41b, the fitting hole 41c, the engagement piece

Claims (7)

an outer container filled with a pressurizing agent;
an inner container housed in the outer container and filled with a concentrate;
A stopper to be contained in a double pressurized container having a lid that seals an inner container and is opened by attaching a discharge member having a valve mechanism,
a seal portion that moves downstream to come into contact with the lid body and closes the flow path of the concentrate;
a pressure receiving portion that contacts the attached discharge member and limits downstream movement of the seal portion to maintain an open state of the flow path of the concentrate;
The stopper is provided with a perforating projection that opens a hole in the inner container by utilizing the contraction and deformation of the inner container that accompanies the discharge of the concentrate. The stopper according to claim 1, which is provided with a retaining plate that receives the concentrate flowing from the upstream side to the downstream side and promotes the movement of the seal part to the downstream side. The stopper according to claim 2, wherein the retaining plate is provided with a passage for ensuring a flow path for the concentrate. The plug according to claim 1, comprising a valve member having a sealing portion and a penetrating member having a piercing projection. The plug according to claim 4, wherein the penetrating member is made of a synthetic resin containing glass fibers. A plug according to any one of claims 1 to 5,
an outer container filled with a pressurizing agent;
an inner container housed in the outer container and filled with a concentrate;
A double pressurized container having a lid that seals the inner container and is opened by attaching a discharge member having a valve mechanism,
the lid body includes a closing portion that is opened by the discharge member, and a tubular portion that extends upstream from the outer periphery of the closing portion to form a flow path for the concentrate,
A double pressurized container in which a plug is held in a cylindrical portion in a state in which it can move freely upstream and downstream. A double pressurized container according to claim 6;
A concentrate filled in an inner container;
A pressurizing agent filled between the inner container and the outer container;
and a discharge member removably attached to the dual pressurized container.

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