JP2017197268A - Discharge container, discharge product using same, and discharge container manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge container that uses a multilayer bottle for preventing the shoulder part of an inner bottle from coming into close contact with the shoulder part of an outer bottle to block a passage to a storage part.SOLUTION: A discharge container 10 is configured such that the neck of an inner bottle 2 is formed longer than that of an outer bottle 11, the upper end of the neck of the inner bottle is aligned with that of the outer bottle, and these bottles are fixed by a valve assembly. The lower end 12d2 of the neck of the inner bottle 12 is lower than the lower end 11d4 of the neck of the outer bottle 11, and thus a gap G is generated between the shoulder of the outer bottle 11 and the shoulder of the inner bottle 12. In particular, when a liquid concentrate C is filled between the outer bottle and the inner bottle, the liquid concentrate C is discharged, and then the gap G is maintained even when the inner bottle 12 is expanded, and a passage is not blocked.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a discharge container, a discharge product, and a discharge container in which an outer bottle is partitioned into two or more storage chambers by an inner bottle, at least one storage chamber is filled with a propellant, and another storage chamber is filled with a stock solution. Relates to the manufacturing method.

  As shown in Patent Documents 1 and 2, the applicant has an outer bottle made of synthetic resin and an inner bottle made of synthetic resin, and stores the stock solution in the stock solution storage chamber between the outer bottle and the inner bottle, We have proposed multilayer bottle products that store propellant in the inner bottle and discharge the stock solution while expanding the inner bottle toward the inner surface of the outer bottle.

Japanese Patent No. 5487011 International Publication No. 2015/152415

  However, in the multilayer bottle products of Patent Documents 1 and 2, the stock solution passage connecting the stock solution storage chamber and the outside air is outside the inner bottle (between the inner bottle and the outer bottle), and the inner bottle is discharged as the stock solution is discharged. In order to swell, when the remaining amount of the stock solution decreases due to use, the space of the stock solution, in particular, the space between the outer bottle and the inner bottle near the boundary between the shoulder part and the shoulder part of the shoulder part and the neck part (shoulder part passage) ) Is easily blocked. In other words, since the expansion force is exerted on the inner bottle by the pressure of the propellant, the outer bottle and a part of the inner bottle come into contact with each other even though the stock solution remains, and an isolation space containing the stock solution is formed. There is a fear. In addition, when filling the propellant between the inner bottle and the outer bottle, especially in the double bottle in which the inner bottle is blow-molded together with the outer bottle, the above-mentioned shoulder passage is not filled with the propellant. There is a problem that it is difficult.

  In view of the above problem, the present invention provides an outer bottle that is divided into two or more storage chambers by an inner bottle, is filled with a propellant in at least one storage chamber, and discharge for discharging a stock solution that is filled in another storage chamber. In the container, the passage between the outer chamber and the inner bottle between the storage chamber and the outside is prevented from being blocked, and the stock solution filled in the storage chamber is discharged to the end, or the storage chamber is easily filled with the propellant. An object is to provide a discharge container.

  The discharge container of the present invention has an outer bottle made of synthetic resin, an inner bottle made of synthetic resin accommodated in the outer bottle, and a valve assembly attached to the outer bottle and closing the outer bottle and the inner bottle. A discharge container for dividing a bottle into two or more storage chambers by an inner bottle, filling at least one storage chamber with a propellant, and discharging a stock solution filled in another storage chamber, the outer bottle Has a cylindrical body part, a shoulder part whose diameter is reduced upward from the upper end thereof, and a cylindrical neck part extending upward from the upper end thereof, the inner bottle is a cylindrical body part, It has a shoulder that is reduced in diameter upward from its upper end, and a cylindrical neck that extends upward from its upper end, and is flexible except for the neck, and the neck of the inner bottle is the neck of the outer bottle Longer and rigid, the lower end of the neck of the inner bottle The lower end of the neck portion of the torque, is characterized in that located below closer than a predetermined size.

In such a discharge container, the storage chamber between the outer bottle and the inner bottle is a stock solution storage chamber for storing the stock solution, and the storage chamber in the inner bottle is a pressure chamber for storing the propellant, It is preferable that the stock solution is discharged from the valve assembly by expanding the inner bottle toward the inner surface of the outer bottle with the pressure of. Further, the storage chamber between the outer bottle and the inner bottle is a pressurizing chamber for storing the propellant, and the storage chamber in the inner bottle is a stock solution storing chamber for storing the stock solution, and the inner bottle is held by the pressure of the propellant. It is preferable to discharge the stock solution from the valve assembly by contraction.
Furthermore, it is preferable that the inner surface of the outer bottle and the outer surface of the inner bottle have substantially the same shape. In addition, a discharge container is preferable in which a flange is provided on the outer periphery of the upper end of the neck of the inner bottle, and the flange is engaged with the upper end of the outer bottle and fixed to the outer bottle by the valve assembly.

  The discharge product of the present invention includes any one of the discharge containers, a stock solution filled in at least one storage chamber, and a propellant filled in another storage chamber.

  The method for producing a discharge container according to the present invention accommodates an inner bottle having a cylindrical neck in an outer bottle having a cylindrical neck shorter than the neck of the inner bottle, and the upper end of the neck of the inner bottle is the neck of the outer bottle. Forming a double bottle projecting above the upper end of the bottle, attaching a valve assembly to the outer bottle, lowering the neck of the inner bottle downward in the axial direction, and lowering the lower end of the neck of the inner bottle It includes a step of being positioned below the lower end of the neck.

  In the discharge container of the present invention, the lower end of the neck portion of the inner bottle is positioned lower than the lower end of the outer bottle by a predetermined dimension or more, so that it is located between the inner surface of the shoulder portion of the outer bottle and the outer surface of the shoulder portion of the inner bottle. There is a gap larger than a predetermined dimension. Therefore, when filling the stock chamber or propellant into the storage chamber between the outer bottle and the inner bottle, or when discharging the stock solution or propellant from there, the shoulders do not adhere to each other, and the gap (shoulder passage) is maintained. Is done. Therefore, even if the neck inner diameter of the outer bottle and the neck outer diameter of the inner bottle are substantially the same, the stock solution and the propellant can be easily filled and discharged.

In such a discharge container, the storage chamber between the outer bottle and the inner bottle is a stock solution storage chamber for storing the stock solution, and the inside of the inner bottle is a pressurizing chamber for storing the propellant, and the inner pressure is controlled by the pressure of the propellant. When discharging the stock solution from the valve assembly while expanding the bottle toward the inner surface of the outer bottle, the neck between the neck of the outer bottle and the neck of the inner bottle from the stock solution storage chamber even if the remaining amount is low The shoulder passage leading to the passage is not easily blocked. Therefore, the stock solution discarded without being discharged can be reduced.
Further, the discharge container is a pressurizing chamber in which the storage chamber between the outer bottle and the inner bottle stores the propellant, the storage chamber in the inner bottle is a stock solution storage chamber in which the stock solution is stored, and the pressure of the propellant When the stock solution is discharged from the valve assembly by shrinking the inner bottle, the gap (shoulder passage) is maintained between the shoulders by attaching the valve assembly even after filling the stock solution storage chamber. Therefore, it is easy to fill the pressure chamber with the propellant.

  When the inner surface of the outer bottle and the outer surface of the inner bottle have substantially the same shape, the shoulder passage extending from the storage chamber to the neck passage between the neck portions is more easily blocked. However, the configuration in which the lower end of the neck portion of the inner bottle is positioned lower than the lower end of the neck portion of the outer bottle by a predetermined dimension or less is less likely to block the shoulder passage. In particular, in a discharge container that stores a stock solution between an outer bottle and an inner bottle, when the stock solution decreases, the inner bottle finally expands until it comes into close contact with the outer bottle. Therefore, almost no stock solution is left.

  Further, when a flange is provided on the outer periphery of the upper end of the neck portion of the inner bottle and the flange is engaged with the upper end of the outer bottle and fixed to the outer bottle by the valve assembly, the lower end of the neck portion of the inner bottle is The distance at the lower end of the neck of the outer bottle is stabilized.

  Since the discharge product of the present invention employs the discharge container described above, in the case of a discharge container that stores the stock solution between the outer bottle and the inner bottle, even if the remaining amount is reduced by discharging the stock solution, The shoulder passage leading to the neck passage between the neck of the outer bottle and the neck of the inner bottle is not easily blocked. Therefore, the stock solution discarded without being discharged can be reduced. In addition, since a gap (shoulder passage) is secured between the shoulders of the outer bottle and the inner bottle, it is easy to fill the propellant even after filling the stock solution.

  According to the manufacturing method of the discharge container of the present invention, the upper end of the neck of the inner bottle is once protruded from the upper end of the neck of the outer bottle, and the neck of the inner bottle is further lowered. The lower end can be positioned below the lower end of the neck of the outer bottle. Furthermore, when attaching the valve assembly to the outer bottle, it is possible to simultaneously lower the neck of the inner bottle.

FIG. 1a is a cross-sectional view showing an embodiment of the discharge product of the present invention, FIG. 1b is a cross-sectional view taken along line X1-X1, and FIG. 2a is a side sectional view of the outer bottle of the discharge product of FIG. 1, and FIG. 2b is a sectional view taken along the line WW. 3a is a cross-sectional view of the inner bottle of the discharge product of FIG. 1, FIG. 3b is a cross-sectional view of the Y1-Y1 line, FIG. 3c is a cross-sectional view of the Y2-Y2 line, and FIG. It is sectional drawing of the other form of an inner bottle. 4A is a cross-sectional view showing a valve assembly of the discharge product of FIG. 1, and FIG. 4B is a cross-sectional view showing a use state thereof. Fig. 5a is a cross-sectional view before filling the stock solution of the double bottle of the discharge product of Fig. 1 before filling the stock solution, Fig. 5b is a cross-sectional view after filling the stock solution, and Fig. 5c is a cross-sectional view after mounting the valve. FIG. 6a is a cross-sectional view showing another embodiment of the discharge product of the present invention, and FIG. 7a to 7c are sectional views showing an embodiment of the manufacturing method of the discharge product of the present invention in the order of steps.

  1a and 1b includes an outer bottle 11, an inner bottle 12 accommodated in the outer bottle 11, a valve assembly 13 attached to the outer bottle 11 and closing the outer bottle 11 and the inner bottle 12, and an outer bottle 11. A stock solution C stored in a cylindrical storage chamber (stock solution storage chamber S1) between the bottle 11 and the inner bottle 12, and a propellant P stored in a storage chamber (pressure chamber S2) in the inner bottle 12 It has. The discharge product 10 operates the valve assembly 13 to communicate the stock solution storage chamber S1 with the outside, thereby expanding the inner bottle 12 toward the inner surface of the outer bottle 11, and contracting the stock solution storage chamber S1 to provide the stock solution. C is discharged. The discharge product 10 is used with the push button 15 or the like attached to the stem 26 of the valve assembly 13. The discharge product 10 before filling with the stock solution C and the propellant P is a discharge container. FIG. 1 b shows the cross-sectional shape of the inner bottle 12 after filling the stock solution C, and FIG. 1 c shows that a gap G remains between the shoulders of the outer bottle 11 and the inner bottle 12 after the stock solution C is discharged. Yes.

As shown in FIG. 2a, the outer bottle 11 includes a bottom portion 11a, a cylindrical body portion 11b, a tapered shoulder portion 11c whose diameter decreases from the upper end of the body portion, and an upper end of the shoulder portion. And a cylindrical neck portion 11d extending upward from the container. The outer bottle 11 has a plurality of ribs 16 extending in the vertical direction from the shoulder portion 11c to the body portion 11b. The rib 16 has a form in which the wall surface of the body portion 11b and the shoulder portion 11c of the outer bottle 11 is bent and protruded in a substantially triangular shape inward, forming a convex portion 16a on the inner surface side and a groove portion 16b on the outer surface side. Yes (
See FIG. 2b). The convex portion 16 a supports the outer surface of the inner bottle 12 so that a gap (gap passage) is formed between the outer bottle 11 and the inner bottle 12 even when the inner bottle 12 expands to the vicinity of the inner surface of the outer bottle 11.

  Further, by extending the convex portion 16a to the body portion 11b, the gap passage can be formed long in the vertical direction. In particular, by forming the rib 16 to the vicinity of the bottom, a gap passage can be formed in the entire discharge container. Further, since the outer bottle 11 is strengthened in the vertical direction by the rib 16, there is no deformation such as buckling even when the valve assembly 13 is attached while being pressed against the outer bottle 11, and the shape of the convex portion 16 a and the groove portion 16 b is maintained, and the gap A passage can be secured. Moreover, it is easy to shrink the inner bottle in the axial direction except for the neck. It is preferable to arrange a plurality of ribs 16 at equal intervals in the circumferential direction. In particular, 4 to 16 ribs 16 are preferably provided. However, the number of the ribs 16 may be one as long as the gap can be secured. Eight ribs 16 are formed on the outer bottle 11.

  The bottom portion 11a has a hemispherical shape continuous from the lower end of the body portion 11b. In particular, the inner surface of the bottom portion 11a is a curved surface continuous from the lower end of the body portion 11b. Thus, when the inner bottle 12 is expanded and deformed by allowing the bottom portion 11a to be smoothly continuous with the lower end of the body portion 11b, the bottom portion 11a of the outer bottle 11 and the bottom portion 12a of the inner bottle 12 are brought into close contact with each other. Can do. That is, the stock solution storage chamber S1 can be efficiently contracted, and the remaining amount of the stock solution C can be reduced. However, the shape of the bottom 11a is not particularly limited. For example, it may be a so-called petaloid shape in which five legs protrude in a circumferential direction at equal intervals.

  The body portion 11b is configured such that the outer bottle 11 can be inflated and deformed within a range not exceeding the elastic limit at a predetermined internal pressure. As shown in FIG. 2b, as the internal pressure is changed from 0 (gauge pressure) to a predetermined internal pressure, the outer bottle 11 is deformed from the original state (solid line in FIG. 2b) to the expanded state (dashed line in FIG. 2b). When in the original state, the groove 16b of the outer bottle 11 appears deep and clearly. On the other hand, in the expanded state, the groove 16b is flattened so as to become shallow.

  In addition, the outer bottle 11 of FIG. 1b has shown the expanded state. That is, the appearance is different between the original state and the expanded state, and the contour of the groove 16b is thin in the expanded state. Therefore, the appearance of the outer bottle 11 is different between when the propellant P is filled and immediately before disposal after the propellant P is discharged. The outer bottle is preferably one that expands and deforms when the internal pressure is 0.1 MPa (gauge pressure) or more. For example, when the outer bottle 11 is formed of a synthetic resin such as polyethylene terephthalate and nylon, the thickness of the body portion 11b is preferably 0.2 to 0.6 mm, particularly preferably 0.25 to 0.5 mm. The shoulder portion 11c may be elastically deformed in the same manner as the body portion 11b. However, the hardness of the body part 11b is not particularly limited, and the body part 11b may be configured not to be deformed by the internal pressure of the outer bottle.

  A male screw 11d1 for fixing the valve assembly 13 is formed on the outer periphery of the neck portion 11d. An outer seal holding portion 11d2 for holding an outer seal material 18 (see FIG. 1) for sealing between the outer bottle 11 and the valve assembly 13 is formed below the male screw 11d1. The outer seal holding portion 11d2 may be provided above the male screw portion 11d1. Furthermore, an annular flange 11d3 for holding the outer bottle 11 when assembling the discharge container or suspending the outer bottle 11 when filling the stock solution C is formed below the male screw 11d1 and the outer seal holding portion 11d2. .

As shown in FIG. 3a, the inner bottle 12 includes a bottom portion 12a, a cylindrical barrel portion 12b, a tapered shoulder portion 12c whose diameter decreases from the upper end of the barrel portion, and an upper end of the shoulder portion. And a cylindrical neck portion 12d extending upward from the container. A flange portion 12d1 protruding outward is formed at the upper end of the neck portion 12d. Flange 1 of inner bottle 12
The length 12L from the lower surface of 2d1 to the lower end 12d2 of the outer surface of the neck portion 12d is longer by, for example, about 0.3 to 8 mm than the length 11L from the upper end of the outer bottle 11 to the lower end 11d4 of the inner surface of the neck portion. More preferably, it is about 0.5-5 mm long. Therefore, in a state where the inner bottle 12 is mounted in the outer bottle 11, the upper end of the neck portion 12d of the inner bottle protrudes from the upper end of the neck portion 11d of the outer bottle, and the lower surface of the flange portion of the inner bottle and the upper end of the neck portion of the outer bottle (See FIG. 5a).

  Here, the lower end 12d2 of the outer surface of the neck portion of the inner bottle is a lower end of a straight cylindrical portion on the outer surface of the neck portion, and indicates a boundary that continues to the tapered shoulder portion 12c. Further, the lower end 11d4 of the inner surface of the neck portion of the outer bottle is a lower end of a straight cylindrical portion on the inner surface of the neck portion, and indicates a boundary that continues to the tapered shoulder portion 11c. Furthermore, the outer diameter of the neck of the inner bottle and the inner diameter of the neck of the outer bottle have substantially the same dimensions. And the neck outer surface of the inner bottle and the neck inner surface of the outer bottle are in close contact except for the neck passage through which the stock solution passes.

  In addition, after assembling the discharge container by attaching the valve assembly to the outer bottle, that is, the upper end of the inner bottle 12 is pushed to push the upper portion of the neck into the neck of the outer bottle, and the flange portion 12d1 of the inner bottle is inserted into the upper end of the outer bottle 11. In a state where the lower surfaces are combined, the lower end 12d2 of the outer surface of the neck portion of the inner bottle is lowered from the lower end 11d4 of the inner surface of the neck portion of the outer bottle (see FIGS. 1a and 5c). Therefore, a gap G is formed between the outer surface of the shoulder portion 12 c of the inner bottle 12 and the inner surface of the shoulder portion 11 c of the outer bottle 11. Even when the stock solution C is discharged and the inner bottle 12 is expanded, the gap G is maintained to a considerable degree because the neck 12d of the inner bottle has rigidity (see FIG. 1c). For this reason, it is possible to avoid a situation in which the shoulder passage from the stock solution storage chamber to the neck passage is blocked during use and a large amount of stock solution C remains, and the remaining amount can be reduced.

  The bottom part 12a, the body part 12b and the shoulder part 12c of the inner bottle 12 are flexible because they are expanded and thinned at the time of blow molding, and the neck part 12d remains a preform so that it has rigidity. ing. Therefore, when pushing down the neck of the inner bottle, even if there is some resistance, it can be pushed into the neck of the outer bottle without buckling. An inner seal material 19 that seals between the inner bottle 12 and the valve assembly 13 is provided on the inner surface of the rigid neck 12d of the inner bottle 12 (see FIG. 1).

  A concave portion 17 is formed on the outer surface of the inner bottle 12 so as to extend vertically from the shoulder portion 12c toward the trunk portion 12c (see FIGS. 3b and 3c). By providing the concave portion 17 up to the body portion 12, the concave portion 17 exhibits the rib effect of the inner bottle 12, and it is possible to prevent the inner bottle 12 from generating a broken line or the like substantially perpendicular to the concave portion 17. That is, when the inner bottle 12 is contracted or expanded, the inner bottle 12 is prevented from being folded in two. Further, the concave portion 17 is convex when viewed from the inner surface of the inner bottle 12, and when the inner bottle 12 is contracted, the concave portion 17 also acts as a broken line extending vertically.

  In addition, in FIG. 1b and FIG. 3b, although the shrink shape of the inner bottle 12 is described regularly, it shows an outline and does not limit a shrink shape. The contraction shape of the inner bottle 12 is irregularly deformed according to not only the configuration of the inner bottle 12 but also the filling path of the stock solution C, the viscosity of the stock solution C, the filling pressure of the stock solution C, and the like. However, the recesses 17 may be formed only on the outer surface of the inner bottle 12, and it is preferable that a plurality of the recesses 17 are annularly arranged at equal intervals. In this embodiment, the number of recesses 17 of the inner bottle 12 is the same as the number of ribs 16 of the outer bottle 11 and is formed at equal intervals. However, the number of ribs 16 and recesses 17 may be different.

In addition, a plurality of vertically extending vertical passage grooves 12P formed at regular intervals are annularly formed from the lower surface of the flange portion 12d1 of the inner bottle 12 through the outer surface of the neck portion 12d to the outer surface of the upper end of the shoulder portion 12c. (See FIGS. 3a and 3c). This vertical passage groove 12P becomes a part of the passage of the stock solution C that connects the stock solution storage chamber S1 and the valve assembly 13 (atmosphere). The vertical passage groove 12P may be provided on the inner surface of the neck portion 11d of the outer bottle 11, or may be provided on both the inner surface of the neck portion 11b of the outer bottle 11 and the outer surface of the neck portion 12b of the inner bottle 12. May be. It is only necessary to form a passage that communicates at least the stock solution storage chamber S1 and the outside air (valve assembly 13).

  The vertical passage groove 12P is formed wide so that a plurality of upper ends of the convex portions 16a and the concave portions 17 are included in a region extending radially outward from the groove bottom 12P1 of one vertical passage groove 12P in plan view. Is preferred. In the inner bottle 12, as shown in FIG. 3c, a total of three convex parts 16 and two concave parts 17 are included in one area in a plan view. Thus, by including the plurality of upper ends of the convex portions 16a and the concave portions 17 in the region, the gap passage and the vertical passage groove 12P are surely formed immediately before the stock solution C disappears in combination with the gap G between the shoulder portions. Can communicate.

  In addition, by arranging the convex portions 16a and the concave portions 17 in the same way for the plurality of vertical passage grooves 12P, the stock solution can be supplied uniformly from the stock solution storage chamber to the valve assembly, and the inner bottle has a stable shape. Can be expanded with. As a result, the gap passage and the longitudinal passage are not easily blocked. Further, as shown in FIG. 3d, for each vertical passage groove 12P, one recess 17 is included in each region extending radially outward from the groove bottom 12P1 of the vertical passage groove 12P in plan view. May be. In addition, it may replace with the recessed part 17 of the inner bottle 12, and the convex part of the inner bottle 12, the convex part or recessed part of the outer bottle 11 may be sufficient.

  The inner bottle 12 is inserted coaxially with the outer bottle 11. And the flange part 12d1 is arrange | positioned at the upper end opening part of the outer bottle 11 (refer FIG. 1). And the bottom part 12a, the trunk | drum 12b, the shoulder part 12c, and the neck part 12d are substantially the same as the inner surface shape of the bottom part 11a, the trunk | drum 11b, the shoulder part 11c, and the neck part 11d of the outer bottle 11, respectively. That is, when the stock solution chamber S1 is filled with the stock solution C, the bottom portion 12a, the body portion 12b, and the shoulder portion 12c are contracted and deformed so that the capacity of the inner bottle 12 is reduced (see FIGS. 1b and 3b). Therefore, when the stock solution C in the stock solution storage chamber S1 is discharged, the bottom portion 12a, the body portion 12b, and the shoulder portion 12c are expanded and deformed (return to the original shape) so that the capacity of the inner bottle 12 is increased, and the stock solution storage chamber S1 is made efficient. Good pressure shrinkage. The neck portion 12d is rigid because it is in the form of a preform and is not blow-molded. The neck portion 12d is inserted along the inner surface of the neck portion 11d of the outer bottle 11 and is not deformed by filling and discharging the stock solution C.

  As long as the inner bottle 12 discharges the stock solution C, the bottom 12a, the trunk 12b, and the shoulder 12c are deformed toward the bottom 11a, the trunk 11b, and the shoulder 11c of the outer bottle 11, respectively. The inner shape and the outer shape of the outer bottle 11 may be modified. For example, the natural shape of the inner bottle 12 at the time of molding may be smaller than the inner surface shape of the outer bottle 11. In this case, by discharging the stock solution C, the bottom portion 12a, the trunk portion 12b, and the shoulder portion 12c are expanded (elastic) to substantially the same shape as the bottom portion 11a, the trunk portion 11b, and the shoulder portion 11c of the outer bottle 11, respectively. (Or plastic).

  Materials for the inner bottle 12 include synthetic resins such as polyethylene terephthalate, polyethylene, and polypropylene, elastomers such as urethane, ester, styrene, olefin, butadiene, and fluorine, silicone rubber, urethane rubber, isoprene rubber, and ethylene. Examples thereof include rubbers such as propylene rubber, ethylene propylene diene rubber, and styrene butadiene rubber, and mixed materials thereof. A combination of materials of the outer bottle 11 and the inner bottle 12 can be appropriately selected according to the application.

As shown in FIG. 4a, the valve assembly 13 includes a stock solution passage 13a that communicates the stock solution storage chamber (S1 in FIG. 1) between the outer bottle and the inner bottle with the outside, and a pressurization chamber (
2 is a lid provided with an in-valve propellant passage 13b that communicates S2) in FIG. 2 with the outside, and a valve mechanism 21 that communicates / blocks the in-valve stock solution passage 13a and the in-valve propellant passage 13b. The valve mechanism 21 is a well-known one comprising a housing 22, a stem 26 accommodated in the housing so as to be movable up and down, and stem rubbers 27a and 27b for closing two stem holes of the stem.

  The housing is screwed onto the outer periphery of the neck of the outer bottle 11 with a cap 28 with a screw. The in-valve stock solution passage 13a communicates with the stock solution storage chamber S1 through a longitudinal passage groove 12P and a gap G between the shoulder portions 11c and 12c. However, the structure of the valve assembly 13 is not particularly limited as long as it includes at least the in-valve stock solution passage communicating with the longitudinal passage groove 12P and the valve mechanism 21 for communicating / blocking the in-valve stock passage. In this embodiment, the valve assembly 13 is detachably fixed to the outer bottle 11 by a cap 28.

  As shown in FIG. 4b, the valve mechanism 21 includes two independent first stem passages 26a (part of the valve stock solution passage 13a) or second stem passage 26b (part of the valve propellant passage 13b). The stem 26 is formed. When the stem 26 is pushed down, the two stem rubbers 27a and 27b are deformed, and both the passages in the valve communicate with each other. In addition, the push button 15 which connects the 1st in-stem channel | path 26a and interrupts | blocks the 2nd in-stem channel | path 26b is used for such a stem 26. FIG. However, the two stock solution passages and the propellant passage in the valve may be communicated / blocked with two stems.

  In the method for manufacturing the discharge product 10, first, a double bottle in which the inner bottle 12 is accommodated in the outer bottle 11 is prepared (see FIG. 5a). In this state, the neck portion 12 d of the inner bottle 12 protrudes from the upper end of the neck portion 11 d of the outer bottle 11. In addition, in FIG. 5a, although the inner bottle 12 is described in a state of being expanded as it is blow-molded, actually, the air in the inner bottle 12 is once sucked and contracted in the outer bottle, Then it is inflated with air. If the crease, pleat, or crease is attached after shrinking in this manner, the stock solution can be easily filled. However, the double bottle to be prepared may not have the inner bottle 12 contracted.

  As a manufacturing method of the double bottle, there is a method in which the outer bottle 11 and the inner bottle 12 are respectively molded, and then the inner bottle 12 is folded and inserted into the outer bottle 11.

  As a second manufacturing method of the double bottle, there is a method in which the outer bottle 11 is molded, an inner preform for the inner bottle is inserted into the inner bottle, and the inner surface of the outer bottle 11 is used as a mold to blow below the shoulder portion. Can be mentioned. In the inner preform, a flange portion 12d1 and a vertical passage groove 12P are formed in the neck portion 12d. In this case, the outer shape of the inner bottle 12 can be made to be in contact with the inner surface of the outer bottle 11, that is, substantially the same shape as the inner surface of the outer bottle 11.

  As a third method for producing a double bottle, a method is provided in which a double preform in which an inner preform for an inner bottle is inserted into an outer preform for an outer bottle is prepared, and the outer bottle 11 and the inner bottle 12 are simultaneously blow-molded. Is mentioned. Specifically, an outer preform in which a male screw 11d1 is formed in the neck portion 11d and an inner preform in which a flange portion 12d1 and a longitudinal passage groove 12P are formed in the neck portion 12d are individually molded by injection molding or the like, and the inner preform is outer-molded. Insert into the preform to prepare a two-layer preform. And the site | part below the shoulder part of the outer bottle 11 and the inner bottle 12 is shape | molded simultaneously by this bilayer preform by biaxial stretching blow. The neck is not blow molded.

After preparing the double bottle, the stock solution C is filled into the stock solution storage chamber S1 through the gap between the flange of the inner bottle 12 and the upper end of the outer bottle 11 (FIG. 5b). At this time, filling is performed while the gap between the inner bottle 12 and the body of the outer bottle and the gap between the shoulders are expanded. Next, a valve assembly 13 is attached to the upper end of the outer bottle 11. At this time, the cap 28 is screwed into the male screw of the outer bottle 11, but as the screw advances, the upper end of the inner bottle is pushed into the outer bottle. Thereby, the lower end 12 d 2 of the neck 12 d of the inner bottle 12 is lowered from the lower end 11 d 4 of the neck 11 d of the outer bottle 11.

  Thereafter, the propellant P is filled into the storage chamber (pressurizing chamber S2) in the inner bottle 12 through the in-valve propellant passage 13b of the valve assembly 13. Finally, the push button 15 is attached to the stem 26 (see FIG. 1a). The order in which the stock solution C and the propellant P are filled may be reversed (see FIG. 7). In that case, with the valve assembly 13 temporarily attached to the outer bottle 11 of the double bottle, the propellant P is filled in the pressurizing chamber S2, and the valve assembly 13 is attached to the outer bottle 11 of the double bottle. At this time, the inner bottle 12 is pushed in, the lower end 12d2 of the neck portion 12d is lowered from the lower end 11d4 of the neck portion 11d of the outer bottle 11, and a shoulder passage is formed. Next, the stem 26 is pushed down so that only the in-valve stock solution passage 13a is communicated to discharge the air in the stock solution storage chamber S1, and then the stock solution C can be pressurized and filled from the in-valve stock solution passage 13a.

  In order to use the discharge product 10, the stem 26 of the valve assembly 13 is pressed through the push button 15. As a result, the first stem passage 26a of the stem 26 is opened, and the stock solution C is discharged. At this time, since the second stem passage 26b of the stem 26 is closed by the push button 15, the propellant P is not ejected. Then, the inner bottle 12 expands in proportion to the discharge amount of the stock solution C.

  By discharging the stock solution C in this manner, the inner bottle 12 expands to the vicinity of the inner surface of the outer bottle 11. However, the lower end 12d2 of the outer surface of the neck portion of the inner bottle 12 is located below the lower end 11d4 of the inner surface of the neck portion of the outer bottle 11, and the neck portion 12d of the inner bottle 12 is hard. The gap (shoulder passage) G remains, the longitudinal passage groove (neck passage) 12P communicates with the stock solution storage chamber S1 to the end, and the stock solution storage chamber S1 and the valve assembly 13 communicate with each other at all times. When the volume of the stock solution storage chamber S1 is reduced and the whole amount of the stock solution C is discharged, the inner bottle 12 has flexibility and substantially contacts the inner surface of the outer bottle 11. Also at this time, the elastic expansion of the outer bottle 11 is maintained by the pressure of the propellant in the inner bottle 12.

  In addition, when using compressed gas as the propellant P, the internal pressure of the inner bottle 12 falls as the volume of the inner bottle 12 expands. Therefore, the expansion of the outer bottle 11 is gradually released, the ribs 16 (the convex portions 16a and the groove portions 16b) are gradually deepened, and the gap passage can be made larger. Therefore, the stock solution C can be efficiently discharged to the end.

  After discharging the entire amount (after use), by removing the push button 15 and pushing down the stem 26, the propellant P in the inner bottle 12 can be discharged to the outside through the in-valve propellant passage 13b. By discharging the propellant P, the elastic expansion of the outer bottle 11 is released, and the outline of the groove 16b of the outer bottle 11 appears clearly. As a result, the user can confirm that the propellant P has been discharged. Therefore, the user can safely remove the valve assembly 13 from the outer bottle 11. Finally, the outer bottle 11, the inner bottle 12, and the valve assembly 13 can be separated.

Next, another embodiment of the discharge product of the present invention will be described with reference to FIGS. 6a and 6b. In the discharge product of FIG. 1a, the storage chamber between the outer bottle 11 and the inner bottle 12 is a stock solution storage chamber. However, in the discharge product 30 of FIG. 6, the storage chamber inside the inner bottle 12 is a stock solution storage chamber. The storage chamber between the inner bottle and the inner bottle is a pressurizing chamber (propellant storage chamber) filled with a propellant. In this discharge product 30, the housing 22 of the valve mechanism 21 forms not only the center of the lower end but also a communication hole 31 with the stock solution storage chamber S1 from the lower end to the side surface. Thereby, as shown by the imaginary line of FIG. 6b, even if the inner bottle 12 contracts, the communication hole 31 is not easily blocked.

  On the other hand, contrary to FIG. 4 b, the push button 15 closes the outer passage 32 communicating with the pressurizing chamber S <b> 2 among the passages of the stem of the double structure, and connects the passage 33 on the center side with the discharge port 34. ing. Therefore, when the push button 15 is depressed, only the stock solution can be discharged from the stock solution storage chamber S1 via the valve 21 without discharging the propellant from the pressurizing chamber S2. When discarding the discharged product that has been used, the remaining propellant is discharged by pressing the end of the stem against a discharge hole provided in an overcap (not shown) or the cap 28 is loosened and discharged.

  In the manufacturing method of the discharge product 30 in FIG. 6, first, the stock solution is filled into the stock solution storage chamber S <b> 1 in the inner bottle 12. At this time, even if the shoulder portion of the inner bottle 12 is deformed and pressed against the shoulder portion of the outer bottle 11 by its own weight, the inner bottle 12 is pushed in by attaching the valve assembly 13 to the outer bottle 11, and the neck portion 12d The lower end 12d2 is lowered from the lower end 11d4 of the neck 11d of the outer bottle 11, and a shoulder passage is formed. Next, the stem 26 can be pushed down with the central passage 33 at the upper end of the stem 26 closed, and only the in-valve propellant passage is communicated to fill the pressurizing chamber S2 with the propellant P.

  5a to 5c, after the stock solution C1 is filled into the stock solution storage chamber S1 between the outer bottle 11 and the inner bottle 12, the propellant P is filled into the pressure chamber S2 in the inner bottle 12. However, as shown in FIGS. 7a to 7c, the propellant P may be filled into the pressurizing chamber S2 in the inner bottle 12 before the stock solution is filled. In this manufacturing method, a double bottle is first prepared by the same method as the manufacturing method of FIG. 5a (FIG. 7a). The outer bottle 11 and the inner bottle 12 may be the same as those shown in FIGS. 2a and 3a. Next, from this state, the inner bottle 12 is filled with the propellant P by undercup filling, and the valve assembly 13 is mounted (FIG. 7b). The propellant P may be filled via the valve mechanism 21 after the valve assembly 13 is mounted. The valve assembly 13 may be the same as that shown in FIG. 4a.

  Subsequently, the stock solution S is filled into the stock solution storage chamber S <b> 1 in the gap between the outer bottle 11 and the inner bottle 12 via the valve mechanism 21. Finally, attach a push button or overcap. In this manufacturing method, since the gap G is formed in advance between the shoulder of the outer bottle 11 and the shoulder of the inner bottle, it is easy to fill the stock solution. This manufacturing method, for example, mass-produces semi-finished products (pressurized containers) filled only with propellant, transports and stores them near the consumption and sales areas, such as factories of customer companies, and responds to demands at customer companies. A final product can be produced by filling the selected stock solution.

  In the discharge product 10 of FIG. 1, the convex portion 16 a and the concave portion 17 are provided on the inner surface of the outer bottle 11 and the outer surface of the inner bottle 12, respectively, but the concave portion is provided on the inner surface of the outer bottle 11 and convex on the outer surface of the inner bottle 12. A part may be provided. In that case, it is preferable that a protrusion is formed on the outer surface of the outer bottle 11 along the recess. In that case, since the outer bottle 11 is elastically expanded, the contour of the ridge becomes thin, that is, the appearance changes with the internal pressure of the outer bottle 11, which is preferable. Further, only the convex portion 16a may be formed on either the inner surface of the outer bottle 11 or the outer surface of the inner bottle 12, or only the concave portion 17 may be formed. Moreover, a convex part or a recessed part may be provided in both, and it is not necessary to provide a convex part or a recessed part in both.

  In the above embodiment, there are two storage chambers formed by being partitioned by the inner bottle, but there may be three or more storage chambers, the propellant is stored in at least one storage chamber, and the stock solution ( For example, two liquids used by mixing may be pressurized.

C undiluted solution P propellant S1 undiluted solution storage chamber S2 pressurizing chamber 10 discharge product 11 outer bottle 11a bottom 11b trunk 11c shoulder 11d neck 11d1 male screw 11d2 outer seal holding section 11d3 annular flange 11d4 neck lower end 12 inner bottle 12a bottom section Part 12c Shoulder part 12d Neck part 12d1 Flange part 12d2 Neck lower end 12P Vertical passage groove G Gap 13 Valve assembly 13a Valve stock solution passage 13b Valve propellant passage 15 Push button 16 Rib 16a Protrusion 16b Groove part 17 Concave part 18 Outer seal material 19 Sealing material 21 Valve mechanism 22 Housing 26 Stem 26a First stem passage 26b Second stem passage 27a, 27b Stem rubber 28 Cap 30 Discharge product 31 Communication hole 32 Outer passage 33 Center side passage 34 Discharge port

Claims (7)

An outer bottle made of synthetic resin,
An inner bottle made of synthetic resin housed in an outer bottle;
A valve assembly that is attached to the outer bottle and closes the outer bottle and the inner bottle;
The outer bottle is divided into two or more storage chambers by the inner bottle, is filled with a propellant in at least one storage chamber, and is a discharge container for discharging a stock solution to be filled in another storage chamber,
The outer bottle has a cylindrical body, a shoulder that is reduced in diameter from its upper end upward, and a cylindrical neck that extends upward from its upper end,
The inner bottle has a cylindrical body portion, a shoulder portion whose diameter is reduced upward from the upper end thereof, and a cylindrical neck portion which extends upward from the upper end thereof, and has flexibility except for the neck portion. ,
The neck of the inner bottle is longer than the neck of the outer bottle and has a hardness,
The lower end of the neck portion of the inner bottle is positioned lower than the lower end of the neck portion of the outer bottle by a predetermined dimension or more,
Discharge container. The storage chamber between the outer bottle and the inner bottle is a stock solution storage chamber for storing the stock solution, the storage chamber in the inner bottle is a pressurizing chamber for storing the propellant, and the inner bottle is removed by the pressure of the propellant. The discharge container according to claim 1, wherein the stock solution is discharged from the valve assembly by expanding toward the inner surface of the valve assembly. The storage chamber between the outer bottle and the inner bottle is a pressurizing chamber for storing the propellant, and the storage chamber in the inner bottle is a stock solution storing chamber for storing the stock solution, and the inner bottle is contracted by the pressure of the propellant. The discharge container according to claim 1, wherein the stock solution is discharged from the valve assembly.   The discharge container according to claim 1, wherein an inner surface of the outer bottle and an outer surface of the inner bottle have substantially the same shape.   The discharge container according to any one of claims 1 to 4, wherein a flange is provided on the outer periphery of the upper end of the neck of the inner bottle, and the flange is fixed to the outer bottle by the valve assembly in a state where the flange is engaged with the upper end of the outer bottle. .   A discharge product comprising the discharge container according to any one of claims 1 to 5, a propellant filled in at least one storage chamber, and a stock solution charged in another storage chamber. An inner bottle having a cylindrical neck is housed in an outer bottle having a cylindrical neck shorter than the neck of the inner bottle, and the upper end of the neck of the inner bottle protrudes above the upper end of the neck of the outer bottle. Forming a heavy bottle;
Attaching the valve assembly to the outer bottle, lowering the neck of the inner bottle downward in the axial direction, and positioning the lower end of the neck of the inner bottle below the lower end of the neck of the outer bottle,
Manufacturing method of discharge container.

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