JP2014237468A - Double aerosol container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double aerosol container which can be filled with a propellant by an under-cup filling method, prevents the propellant from penetrating and being mixed with contents, and has crushing of an inner bag concentratedly occurring in a bottom part.SOLUTION: In a double aerosol container 10, an opening part of a metallic inner bag 12 is projected upward from an opening part of an outer can 11 when the inner bag 12 is mounted on a bottom part 11a of the outer can 11. In the double aerosol container 10, a propellant is filled into the outer can 11 from a clearance between the opening part of the outer can 11 and the opening part of the inner bag 12, and then a valve 13 is fixed on the outer can 11.

Description

  The present invention relates to a double aerosol container, and more particularly to a double aerosol container in which an inner bag of the double aerosol container is made of a metal material such as aluminum.

  As shown in FIG. 15A, a conventional common double aerosol container includes a bottomed cylindrical outer can 50 and a bottomed cylindrical inner bag placed on the bottom 51 of the outer can 50. 52 and a mounting cup 54 (aerosol valve) having a valve 53. The inner bag 52 of the double aerosol container is filled with the contents, and the space between the outer can 50 and the inner bag 52 is filled with propellant to form a double aerosol product. Then, by opening the valve 53, the content receiving pressure from the propellant through the inner bag is pushed out of the valve 53. Examples of the contents stored in the inner bag 52 include a hair dye, a shaving gel, and a hair styling agent.

The outer can 50 is manufactured from aluminum slag or a metal plate. Specifically, after forming a bottomed cylindrical container body by impact molding from aluminum slag or DI molding from a metal plate, it is erected from the shoulder 55 and this shoulder 55 by necking etc. The curled portion 56 is formed by curling the opening and then curling the opening.
The inner bag 52 has a flange portion 57 disposed at the upper end above the curled portion 56 of the outer can 50 and is manufactured from a synthetic resin material such as polyethylene. Specifically, it is manufactured by molding a parison by injection molding or the like and then blow-molding the parison. The inner bag 52 is a flange portion 57 of the inner bag 52 filled with the contents before the mounting cup 54 is clinched and the inner bag 52 is placed on the bottom surface of the outer can 50. Is configured to protrude upward from above the curled portion 56 of the outer can 50. Then, the inner bag 52 is fixed by sandwiching the flange portion 57 of the inner bag 52 between the curled portion 56 of the outer can 50 and the mounting cup 54 via a sealing material 59.
The double aerosol container configured as described above is manufactured by storing the inner bag 52 and then fixing the valve 53 and the mounting cup 54 on the outer can 50. Specifically, the inner bag 52 accommodated in the outer can 50 is filled with the contents, an aerosol valve is attached so as to close the opening of the inner bag 52, and the curl portion 56 of the outer can and the flange portion 57 of the inner bag. The propellant is filled in the outer can 50 from between the two. Immediately thereafter, the aerosol valve is pushed down to push the inner bag 52 into the outer can 50, and at the same time, the mounting cup 54 is clinched to the curled portion 56 of the outer can, and the inner bag 52, valve 53, and mounting cup 54 are moved to the outer can 50. Secure to.

  In this way, when the mounting cup 54 is put on the curled portion 56 of the outer can 50 to clinch, the flange portion 57 of the inner bag 52 is pressed against the upper surface of the curled portion 56 of the outer can 50, and the body portion of the inner bag 52 is pressed. Are forced in the axial direction. However, a bellows portion 58 is formed in the body portion of the inner bag 52, and the bellows portion 58 acts as a spring and contracts to absorb the pressing force. As a result, the inner bag 52 can be prevented from being deformed and torn at irregular positions on the body portion, and the contents and propellant can be prevented from leaking, so that the clinching operation of the mounting cup 54 can be performed more safely and reliably. Can do.

Further, as a conventional small double aerosol container, as shown in FIG. 15B, a small outer can 60 and an inner bag 62 are used. In the outer can 60, after forming the container body from aluminum slag or a metal plate, the shoulder portion 65 is formed by necking the opening portion, and the outer periphery on the lower side of the opening portion is roll-formed, thereby forming the recess 60b. Is done. The inner bag 62 has an opening end with its upper end straight upward, and is manufactured from a synthetic resin material such as polyethylene. In addition, before the valve 63 is fitted, with the inner bag 62 placed on the bottom surface 60 a of the outer can 60, the opening end of the inner bag 62 protrudes upward from the opening of the outer can 60. Is configured to do.
Since it is configured in this way, the inner bag 62 accommodated in the outer can 60 is filled with the contents, and a valve is attached so as to close the opening of the inner bag 62, and the opening of the outer can and the inner bag The propellant is filled into the outer can 60 from between the front end of the opening, and then the valve is quickly pushed down to push the inner bag 62 into the outer can 60. At the same time, the front end of the cover 64 covering the valve is recessed. The inner bag 62, the valve 63, and the cover 64 are fixed to the outer can 60 by crimping to 60b. At this time, the inner bag 62 is forcibly inserted with a pressing force applied in the axial direction. Similarly, the bellows portion 68 acts as a spring and contracts to absorb the pressing force. It is possible to prevent the bag 62 from being deformed and torn at an irregular position on the trunk. As such conventional patent publications, there are Patent Literature 1 and Literature 2.
Furthermore, Patent Document 3 discloses a double aerosol container including a metal inner bag suspended from an aerosol valve in an outer can.

Japanese Patent No. 293248 Japanese Patent No. 362068 Japanese Patent No. 2965079

However, the conventional double aerosol container has the following drawbacks.
(1) When the inner bag is made of a synthetic resin material such as polyethylene, depending on the type of propellant and / or contents, the propellant and / or contents permeate the inner bag and enter the other space. However, there was a problem that the contents in the inner bag deteriorated in a short period of time.
(2) In the case of an inner bag manufactured from a metal material such as aluminum, since it is inferior in flexibility and stretchability to a synthetic resin, an under cup filling method in which a propellant is filled from between the outer can and the inner bag is adopted. There are the following problems.
(2-a) Since the inner bag of the metal material is weakly adhered to the aerosol valve, the sealing performance cannot be obtained even if the opening of the inner bag is fitted to the housing of the aerosol valve, and the under cup filling method However, there were problems such as propellant entering the inner bag and tearing the inner bag.
(2-b) When the opening of the inner bag is protruded above the opening of the outer can in order to prevent the propellant from entering the inner bag, it is necessary to push down the valve after filling with the propellant. There is a problem that it is difficult to control the deformation of the inner bag having poor flexibility when it is pushed down. In particular, if the vicinity of the opening of the inner bag sandwiched between the outer can and the aerosol valve is deformed, it cannot be fixed in the designed shape, the sealing performance is lowered, and the propellant is liable to leak.
(2-c) The same shape as the inner bag of the synthetic resin as in Patent Documents 1 and 2, that is, if the bellows portion for absorbing the pressing force when clinching is absorbed by the bellows portion, the bellows portion is broken. was there.
(3) For the reason of (2) above, for example, in the case of an inner bag manufactured from a metal material such as aluminum as in Patent Document 3, a rubber stopper for filling a propellant is provided at the bottom of the outer can, It was necessary to fill the propellant from the rubber stopper. However, the structure of the outer can is complicated, and a process for filling the propellant from the rubber stopper and a process for inspecting the leakage from the rubber stopper are required, which takes time for manufacturing. There was a problem that the contents could not be discharged due to leakage. The inner bag is held at the curl or indentation so that the inner bag is not compressed in the axial direction when the aerosol valve is fixed, and the upper end of the inner bag is flush with the outer can. It is.
This invention has been made paying attention to such problems, and the inner bag is made of a metal material such as an aluminum material, thereby preventing permeation of the propellant and mixing with the contents. Even if the inner bag is a metal material such as an aluminum material, the propellant can be filled with the under cup filling method, the inner bag is always crushed at the bottom, the inner bag is irregularly crushed and propellant, It aims at providing the double aerosol container which prevented the leakage of the contents.

The double aerosol container of the present invention has an outer can, an inner bag accommodated therein and filled with contents, a valve that communicates with the inner bag and is attached to the outer can, and has a propellant In a double aerosol container in which the inner bag is compressed and deformed by the pressure of its propellant when the valve is opened when the outer can and the inner bag are filled, the inner bag is an outer can The bottom of the inner bag is made of a metal with a bottom and is configured to project upward from the opening of the outer can when it is placed on the bottom of the container. The valve is attached to the outer can by applying an axial pressing force to the inner bag to deform the deforming portion.
In such a double aerosol container, the inner bag is preferably formed of aluminum. Moreover, it is preferable that the deformation part is provided at the bottom part of the inner bag or at the trunk part. Further, it is preferable that the deformed portion of the inner bag has a shape in which the outer diameter is reduced downward. Further, it is preferable that the deforming portion is a step portion formed on the trunk portion or a thin portion formed on a part of the trunk portion. And what made the thickness of the bottom part of an inner bag 1-2 times the thickness of the trunk | drum is preferable.

In such a double aerosol container, the valve includes a cylindrical housing that communicates with the inside of the inner bag, and the housing is a cylindrical fitting portion that fits into the opening of the inner bag. And a cylindrical inner bag deforming portion provided below the fitting portion and having a cross-sectional shape smaller than the cross-sectional shape of the opening portion of the outer can, and the inner bag is fitted into the fitting portion of the housing. When they are combined, a gap is formed between the inner bag and the inner bag deforming portion, and the inner bag is pressed against the inner bag deforming portion and deformed in such a direction that the gap disappears. Preferably, a propellant filling passage is formed.
In this case, it is preferable to form a discharge hole communicating with the inside and outside of the inner bag deformed portion.

The double aerosol container of the present invention has an outer can, an inner bag accommodated therein and filled with contents, a valve that communicates with the inner bag and is attached to the outer can, and has a propellant In a double aerosol container filled between the outer can and the inner bag and when the valve is opened, the inner bag is compressed and deformed by the pressure of the propellant, and the contents are discharged.
When the inner bag is placed on the bottom of the outer can, the inner bag is made of a metal with a bottomed cylindrical shape so that the opening of the inner bag protrudes upward from the opening of the outer can, and the axial direction A deformable portion that contracts, and an axial pressing force is applied to the inner bag to deform the deformable portion and attach the valve to the outer can. In addition, after the production, there is an effect of preventing permeation of the propellant and mixing with the contents.
When the inner bag is formed from aluminum, the strength of the inner bag can be increased and light.
When the deforming portion is provided at the bottom of the inner bag, the inner bag can be prevented from being irregularly crushed by deforming the bottom even if the inner bag is a metal material such as an aluminum material. At the same time, by deforming the bottom part, deformation of the opening of the inner bag can be prevented, and the effect of preventing leakage of the propellant and contents can be obtained.
When the deforming portion is provided in the body portion of the inner bag, the inner bag can be prevented from being irregularly crushed and the inner bag opening can be prevented from being deformed by reliably deforming the deforming portion.
When the deformed portion of the inner bag has a shape in which the outer diameter is reduced downward, the inner bag can be sequentially deformed from below, and the burden on the inner bag can be reduced as much as possible.
When the deformation | transformation part of the trunk | drum of an inner bag is a step part, when an inner bag is pressed to an axial direction, a step part can be bent preferentially and an inner bag can be pushed down.
When the deformation | transformation part of the trunk | drum of an inner bag is a thin part, when an inner bag is pressed to an axial direction, a thin part can be expanded preferentially and an inner bag can be pushed down.
When the thickness of the bottom portion of the inner bag is set to 1 to 2 times the thickness of the trunk portion, the deformation portion can be prevented from being broken.

A double aerosol container according to the present invention, wherein the valve includes a cylindrical housing that communicates with the inside of the inner bag, the cylindrical fitting portion that fits the opening of the inner bag, and the housing A cylindrical inner bag deforming portion provided below the fitting portion and having a cross-sectional shape smaller than that of the opening of the outer can, and when the inner bag is fitted to the fitting portion of the housing A gap is formed between the inner bag and the inner bag deforming portion, and the propellant is deformed by pressing the inner bag against the inner bag deforming portion and deforming the gap in a direction that disappears. When the filling passage is formed, the propellant can be smoothly filled even in the case of a metal inner bag having no elastic deformation. Here, the “cross-sectional shape of the opening of the outer can” refers to a portion having the smallest cross-sectional area of the opening of the outer can.
When the inner bag deformed part has a discharge hole that communicates the inside and the outside, after fitting the opening of the inner bag to the fitting part of the housing, the inside of the housing is vacuumed, The inner bag covering the inner bag is deformed in the housing direction, the inner bag is easily brought into close contact with the inner bag deforming portion, and the propellant can be further easily filled.

FIG. 1 is a cross-sectional view showing an embodiment of a double aerosol container according to the present invention. 2a shows that the flange portion (opening portion) of the inner bag of the double aerosol container of FIG. 1 protrudes upward from the curled portion (opening portion) of the outer can, and the propellant is filled between the flange portion and the curled portion. FIG. 2B is a cross-sectional view showing a shape different from the bottom of the inner bag of FIG. 2A. 3a and 3d are sectional views showing the shape of the bottom portion of the inner bag of FIGS. 2a and 2b, respectively, and FIG. 3b is a sectional view showing the shape of the bottom portion of the inner bag when the valve is attached to the outer can. FIG. 3c is a comparison diagram. 4a and 4b show another embodiment of the double aerosol container according to the present invention (an embodiment of a small double aerosol container), and a cross section showing a state after a valve is mounted on the outer can FIG. FIGS. 5a and 5b show that the opening end of the inner bag of the double aerosol container of FIGS. 4a and 4b protrudes upward from the opening end of the outer can, and between the opening end of the inner bag and the opening end of the outer can. It is sectional drawing which shows the state just before filling with propellant from. FIG. 5 is a cross-sectional view of a double aerosol container in which two small double aerosol containers are combined, showing still another embodiment of the double aerosol container according to the present invention. 7a is a cross-sectional view showing another embodiment of the double aerosol container according to the present invention, FIG. 7b is a partially enlarged view thereof, and FIG. 7c is a comparative view. Fig. 8a is a sectional view showing another embodiment of the double aerosol container according to the present invention, and Fig. 8b is a partially enlarged view thereof. It is sectional drawing which shows other embodiment of the double aerosol container which concerns on this invention. FIG. 10a is a sectional view showing another embodiment of the double aerosol container according to the present invention, and FIG. 10b is a partially enlarged view thereof. It is sectional drawing which shows other embodiment of the double aerosol container which concerns on this invention. It is sectional drawing which shows the state just before filling with a propellant from between the opening part front-end | tip of the inner bag of the double aerosol container of FIG. 11, and the opening part front-end | tip of an outer can. 13a is a cross-sectional view showing a state where the double aerosol container of FIG. 11 is filled with a propellant, and FIGS. 13b to 13d are cross-sectional views showing other embodiments. 14a and 14b show still another embodiment of the double aerosol container according to the present invention, and FIG. 14a is a cross-sectional view showing a state in which an aerosol valve is attached to the opening of the inner bag. FIG. 3 is a cross-sectional view showing a state in which a propellant filling passage is formed immediately before filling with a propellant. 15a and 15b are cross-sectional views showing a conventional double aerosol container having an inner bag having a bellows portion formed on a trunk portion.

  FIG. 1 shows an embodiment of a double aerosol container 10 according to the present invention, a bottomed cylindrical outer can 11, and a bottomed cylindrical inner bag 12 placed on the bottom 11 a of the outer can 11. And a mounting cup 14 (aerosol valve) having a valve 13.

  As shown in FIG. 2a, the outer can 11 is formed by impact molding from a metal slag such as aluminum, or by drawing or drawing ironing from a metal plate such as aluminum, thereby forming a bottomed cylindrical container body. After that, the shoulder portion 11b and the opening portion standing from the shoulder portion 11b are formed by necking or the like, and then the curling portion 11c is formed by curling the opening portion. As for the outer can 11, the curl part 11c comprises an opening part, and the inner surface of this curl part 11c becomes a site | part with the smallest cross-sectional shape. The bottom part 11a has a substantially flat shape. In addition, the outer can 11 of FIG. 2b has a bottom part 11a having a raised shape. Thus, the height of the inner bag 12 can be made low by raising the bottom part 11a. However, the shape of the bottom portion 11a of the outer can 11 is not particularly limited. As described later, when the inner bag 12 is placed on the bottom portion 11a of the outer can 11, the opening portion of the inner bag 12 is outside. What is necessary is just to be comprised so that it may protrude upwards from the opening part of the can 11. FIG.

As shown in FIGS. 2a and 2b, the inner bag 12 is manufactured by impact molding from a metal slag such as aluminum, or by drawing or drawing ironing from a metal plate such as aluminum. 12a, and a flange portion 12b (opening tip) at the upper end of the body portion. The inner bag 12 is a flange portion of the inner bag 12 before the valve 13 is mounted on the outer can 11 and the bottom portion 15 of the inner bag 12 is placed on the bottom portion 11a of the outer can 11. 12 b is configured to protrude upward from the curled portion 11 c of the outer can 11.
As shown in FIGS. 3A and 3D, the bottom portion 15 has a shape that is easily deformed when a pressing force is applied in the axial direction. Specifically, the outer shape is reduced in diameter toward the lower side. 2a employs the bottom 15 of FIG. 3a and FIG. 2b employs the bottom 15 of FIG. 3d. In particular, the combination of the bottom 11a of the outer can 11 and the bottom 15 of the inner bag 12 is not limited.
The inventor forcibly applies a pressing force to the inner bag 12 in the axial direction in the outer can 11 when the valve 13 is fixed. It was found that the pressing force at the time of absorption can be absorbed effectively. That is, it has been found that by providing the inner bag 12 with a shape that is easily deformed, the deformed portion is deformed and crushed to absorb the pressing force. As a result, it was possible to prevent a part of the inner bag 12 from being irregularly deformed and torn and to solve the problem of reducing the number of manufacturing steps and the manufacturing cost.

In addition, when pressure is applied to the inner bag 12 in the axial direction to deform the bottom portion 15 (deformation portion), the walls of the metal sheets of the bottom portion 15 do not face each other with a gap S as shown in FIG. Preferably it is configured. As shown in FIG. 3c, when the deformed portion is deformed so that the walls of the metal sheets of the bottom portion 15 are in surface contact with each other, the collapsed portion (surface contact portion) is substantially doubled in thickness. Increased rigidity. If the rigidity of a part of the inner bag is increased in this way, when the contents are discharged while the inner bag 12 is being crushed, this portion may not be sufficiently deformed, which may cause liquid residue.
Therefore, when the inner bag 12 is pressed in the axial direction, it is preferable that the bottom portion 15 (deformation portion) is deformed so that a certain amount of gap S remains in the vertical direction even if the inner bag 12 is collapsed so as to be folded as shown in FIG. . Specifically, as the amount of pushing of the inner bag 12 increases, the amount of deformation increases and surface contact between the walls tends to occur. Therefore, when the bottom portion 15 (deformed portion) is deformed according to various shapes of the bottom portion 15, the pushing amount of the inner bag 12 into the outer can 11 (that is, the inner bag 12 of the inner bag 12 is prevented so that surface contact does not occur). It is preferable to appropriately select the upward protrusion amount.

The bottom portion 15 in FIG. 3a is substantially hemispherical and formed in a semicircular shape in the longitudinal section. In such a bottom portion 15, the diameter R is suitably 7 mm ≦ R ≦ 19 mm, and can be set according to the specification and size of the inner bag 12. Also, the thickness of the bottom portion 15 can be set as appropriate. However, if the thickness is too large with respect to the thickness of the body portion 12a, the inner bag 12 itself is not easily crushed, and is not sufficiently deformed when the contents are discharged. The remaining amount of contents at the end of use may become large. Note that the thickness of the bottom 15 may be uniform, or may gradually increase from the center to the edge. And it is preferable to make the thickness of the bottom part 15 into the range of 1 to 2 times with respect to the thickness of the trunk | drum 12a. Specifically, the thickness of the bottom portion 15 is suitably in the range of 0.1 to 0.4 mm while the thickness of the trunk portion 12a is 0.1 to 0.2 mm.
The bottom portion 15 in FIG. 3d has a substantially truncated cone shape composed of a disk-shaped flat portion 16 and a tapered portion 17 extending upward at an angle θ from the peripheral edge thereof. The angle θ is suitably 15 ° ≦ θ ≦ 55 °, and can be set according to the specification and size of the inner bag 12. Further, the thickness of the bottom portion 15 is preferably in the range of 1 to 2 times the thickness of the body portion 12a so as to be easily deformed. Specifically, the thickness of the bottom portion 15 is suitably 0.1 to 0.4 mm while the thickness of the trunk portion 12a is 0.1 to 0.2 mm. Here, the flat portion 16 is provided, but the flat portion 16 may not be provided and may be a conical bottom portion. The thickness of the bottom 15 may be uniform or may gradually increase from the center to the edge.
Also in this case, it is preferable to design the inner bag 12 so that when the bottom portion 15 is deformed, a folded portion (surface contact by walls) is not formed.

Returning to FIG. 2 a, the valve 13 includes a cylindrical housing 13 a that communicates with the inner bag 12, and a stem 13 b that can be moved up and down in the housing 13 a and is urged upward.
The mounting cup 14 includes a cylindrical rising wall 14a, a cylindrical valve holding portion 14b provided therein, a disk-like connecting portion 14c that connects lower ends of the rising wall 14a and the valve holding portion 14b, It consists of the annular flange part 14d which protrudes outward from the upper end of the rising wall 14a.

After the inner bag 12 is stored in the outer can 11, the double aerosol container 10 is filled with the contents with the flange portion 12 b (opening tip) of the inner bag 12 protruding above the outer can 11. A mounting cup 14 having a valve 13 is inserted into the bag 12. At this time, the inner surface of the opening of the inner bag 12 and the outer peripheral surface of the rising wall 14a of the mounting cup 14 are brought into close contact with each other. Thereafter, a propellant (arrows in FIGS. 2a and 2b) is filled so as to follow the side of the inner bag protruding upward from the opening of the outer can from between the opening of the outer can 11 and the opening of the inner bag 12. (Under cup filling), then, the flange 12c of the inner bag 12 is pressed toward the outer can 11 and the rising wall 14a of the mounting cup 14 is clinched toward the shoulder 11b of the outer can 11 (Clinch) Part C, see FIG. 1). An annular sealing material 18 is provided between the lower surface of the flange portion 12 b of the inner bag 12 and the curled portion 11 c of the outer can 11.
The inner bag 12 is filled with the contents of the medicine, hair dye, cleansing cream, etc., and the inner bag 12 is pressed by the pressure of the propellant and pushed out from the valve 13.

4a and 4b show another embodiment of the double aerosol container according to the present invention, which is a small double aerosol container 20a and b in which the opening of the outer can 21 is sealed with a valve 23.
The double aerosol container 20 a shown in FIG. 4 a includes a bottomed cylindrical outer can 21, a bottomed cylindrical inner bag 22 placed on the bottom 21 a of the outer can 21, and a valve 23.

  As shown in FIG. 5a, the outer can 21 forms a bottomed cylindrical container body by impact molding from a metal slag such as aluminum or by drawing or drawing ironing from a metal plate such as aluminum. After that, the shoulder portion 21b and the neck portion 21c standing from the shoulder portion 21b are formed by necking, and the recess 21d is formed on the outer periphery of the middle portion of the neck portion 21c by roll forming. As for the outer can 21, the neck part 21c comprises an opening part, and the inner surface of the recess 21d becomes a site | part with the smallest cross-sectional shape in an opening part. The bottom 21a has a substantially flat shape.

  The inner bag 22 is manufactured by impact molding from a metal slag such as aluminum or by drawing or squeezing and ironing from a metal plate such as aluminum, and is formed at the bottom 15, the barrel 22a, and the barrel top. A neck portion 22b (opening tip) that is larger in diameter than the body portion is provided. In addition, the inner bag 22 is before the valve 23 is mounted on the outer can 21, and in a state where the bottom portion 15 of the inner bag 22 is placed on the bottom portion 21 a of the outer can 21, the neck portion 22 b of the inner bag 22. However, it is comprised so that it may protrude upwards from the upper end of the neck part 21c of the outer can 21. FIG. The bottom portion 15 of the inner bag 22 is substantially the same as the bottom portion 15 of FIGS. 3A and 3B, and has a shape that is easily deformed when a pressing force is applied in the axial direction.

Referring back to FIG. 4a, the valve 23 includes a cylindrical housing 25 that communicates with the inside of the inner bag 22, a stem 23a that can be moved up and down in the housing 25, and is urged upwardly. 25, and a cover 23b covering 25. The valve 23 is for fixing the valve 13 by caulking the lower end of the cover 23 b to the recess 21 d of the outer can 21.
The housing 25 includes a cylindrical upper tube portion 25a, a flange portion 25b provided at the upper end thereof and projecting radially outward, and a lower tube portion 25c having a diameter smaller than that of the upper tube portion 25a at the lower end of the upper tube portion 25a. It has. The neck portion 22b of the inner bag 22 is fitted to the upper tube portion 25a, and the body portion 22a of the inner bag 22 is fitted or brought into contact with the lower tube portion 25c. The flange portion 25 b is disposed on the upper end of the neck portion 21 a of the outer can 21 via the seal member 24. Further, when the inner bag 22 is pressed downward in the axial direction, a step portion between the upper tube portion 25 a and the lower tube portion 25 b is supported by the recess 21 d of the outer can 21. A communication hole 25 d that communicates with the inner bag 22 is provided at the lower end of the housing 25.
The cover 23 b covers the housing 25 and the neck portion 21 c of the outer can 21, and a lower end thereof is caulked in the recess 21 d of the outer can 21, and the housing 25 is fixed to the outer can 21.

In the double aerosol container 20a, the valve 23 is fixed, so that the inner bag 22 is inserted into the outer can 21 with a force applied in the axial direction. The present inventor absorbed and solved the axial pressing force by deforming and crushing the bottom portion 15 without forming a bellows or the like in the body portion of the inner bag 22. That is, the problem was solved by making the bottom part easily deformable and thick.
In the double aerosol container 20b of FIGS. 4b and 5b, the bottom 21a of the outer can 21 has a raised shape, and the bottom 15 of the inner bag 22 has a truncated cone shape as shown in FIG. 3d. This differs from the double aerosol container 20a of FIG. 4a. The other configuration is substantially the same as that of the double aerosol container 20a of FIG. 4a, and the inner bag 22 has a bottom 15 that is easily deformed.

FIG. 6 shows another embodiment of the double aerosol container according to the present invention, which is a double aerosol container. The double aerosol container 26 is a combination of two small double aerosol containers 20 shown in FIGS. 4 and 5. Specifically, the double aerosol container 20 c for the first agent and the second aerosol container 20 for the second agent are used. It is composed of a double aerosol container 20d and a discharge device 27. For example, the content for the first agent containing the dye is filled in the inner bag 22 of the double aerosol container 20c, and the propellant is filled to fix the valve. Further, the content for the second agent containing hydrogen peroxide that oxidizes the dye is filled in the inner bag of the double aerosol container 20d, and the propellant is filled to fix the valve. The discharge device 27 includes a connecting body 28 for connecting two aerosol containers, two stem engaging portions 29a for inserting the stems of the respective valves, and a discharge port 29b communicating with the stem engaging portion 29a. Each of the contents filled in the two double aerosol containers can be discharged simultaneously by operating the spout 29. In addition, in the discharge port 29b, each content may be discharged independently, or may be mixed and discharged.

FIGS. 7 a, 8 a, and 10 a are other embodiments of the double aerosol container according to the present invention, which are double aerosol containers 30 a, b, and c having a deformed portion in the body portion of the inner bag 12.
The double aerosol container 30a shown in FIG. 7a includes a bottomed cylindrical outer can 21, a bottomed cylindrical inner bag 31 placed on the bottom 21a of the outer can 21, and a valve 23. The outer can 21 and the valve 23 are substantially the same as the outer can 21 and the valve 23 of FIG.

  The inner bag 31 is manufactured by impact molding from a metal slag such as aluminum, or by drawing or drawing ironing from a metal plate such as aluminum, and is formed at the bottom 31a, the barrel 32, and the barrel upper end, A neck portion 31b (opening tip) having a diameter larger than that of the body portion is provided. Further, the inner bag 31 is the neck 31b of the inner bag 31 before the valve 23 is mounted on the outer can 21 and the bottom 31a of the inner bag 31 is placed on the bottom 21a of the outer can 21. However, it is comprised so that it may protrude upwards from the upper end of the neck part 21c of the outer can 21. FIG.

As shown in FIG. 7 b, the body portion 32 includes an annular groove 32 a formed by a first annular step portion 33 that decreases in diameter and a second annular step portion 34 that increases in diameter downward. ing. Note that the upper wall 33a of the first annular step 33 and the lower wall 34a of the second annular step 34 are tapered and have an angle with respect to the horizontal plane. Further, the upper wall 33a and the lower wall 34a may be slightly curved. FIG. 7b shows the shape of the annular groove 32a before the inner bag is pressed in the axial direction. The annular groove 32a has a curved portion as indicated by a solid line, but the tangent of the curved portion can be simply represented by a triangle indicated by a broken line. That is, the annular groove 32a of FIG. 7a includes a curved portion in the valley portion (the connection portion of the first annular step portion 33 and the second annular step portion 34), and the peak portion (the cylindrical portion of the trunk portion) from the valley portion. It has a contour line that is smoothly continuous to the curved portion of the mountain portion through the curved portion and the straight portion inclined toward the surface. By appropriately designing the angle of these tangents (the angle of the upper wall 33a and the lower wall 34a), the radius of curvature (the curvature of the upper wall 33a and the lower wall 34a) or the depth of the annular groove, the inner bag can be pushed down. can do. Further, at least one annular groove 32a may be formed. Furthermore, only one of the first annular step portion 33 and the second annular step portion 34 may be formed. A plurality of them may be provided. By providing a plurality, the amount by which the inner bag 31 is pushed down can be increased. When a plurality of annular grooves are provided as shown in FIG. 7a, it is preferable to provide at least a cylindrical portion 32b between adjacent annular grooves 32a. By providing the cylindrical portion 32b, it is possible to prevent the metal sheet wall such as a bellows from being deformed so as to come into surface contact. In addition, in the case of the bellows provided with the annular grooves 32a continuously, all the annular grooves 32a cannot be uniformly deformed, or the deformation state of the adjacent annular grooves 32a is different, which causes bending deformation. It becomes difficult to control, and as a result, during use of the aerosol can, only a part of the annular groove 32a is loaded and the inner bag may be broken, but even when the annular groove 32a is one or plural By providing the cylindrical portion 32b, the annular groove 32a can be reliably deformed, and the inner bag can be prevented from being broken.
Such an annular groove 32a is formed by roll processing or the like in which a roll is brought into contact with the outer peripheral surface of the cylindrical body. When only the first annular step 33 or the second annular step is provided, it may be formed by drawing or the like.

  Since the trunk | drum 32 which has such an annular groove 32a is provided, if the inner bag 31 is pressed to an axial direction, the annular groove 32a will deform | transform in the direction which closes a groove | channel. At this time, the upper and lower walls 33a and 34a of the annular groove 32a are configured not to contact each other (see FIGS. 7b and 7c). This is because the radius of curvature of the lower wall 34a of the annular groove 32a, the tangential part from the curved part of the lower wall 34a to the trunk part, that is, the angles of the upper and lower walls 34a, b, and the depth of the annular groove 32a are pushed into the inner bag 31. It is comprised by designing suitably according to quantity. In addition, the trunk | drum 32 may have only the 1st cyclic | annular step part 33 (for example, refer FIG. 9) or the 2nd cyclic | annular step part 34 as a deformation | transformation part.

The double aerosol container 30b of FIG. 8a is a modification of the double aerosol container of FIG. 7a. The annular groove 35a of FIG. 8a has a cylindrical connecting portion 36 parallel to the cylindrical body portion between the first annular step portion 33 and the second annular step portion 34.
The double aerosol container 30 b of FIG. 8 a is composed of a bottomed cylindrical outer can 21, a bottomed cylindrical inner bag 35 placed on the bottom 21 a of the outer can 21, and a valve 23. The outer can 21 and the valve 23 are substantially the same as the outer can 21 and the valve 23 of FIG.
By providing the cylindrical connecting portion 36 in this way, it is possible to prevent overlap between the upper wall 33a of the first annular step portion 33 and the lower wall 34a of the second annular step portion 34. The curvature radius, angle, and depth of the first annular step portion 33 and the second annular step portion 34 are appropriately designed in accordance with the pushing amount of the inner bag 35, similarly to the annular groove 32a of FIG. 7a. Also in the double aerosol container 30b of FIG. 8a, a plurality of annular grooves 35a may be provided. In this case, since it has the cylindrical connection part 36, you may provide the annular groove 35a adjacently. However, it may be provided via the cylindrical portion 35b as in FIG. 7a. Such an annular groove 35a is formed by roll processing or the like.

The double aerosol container 30c in FIG. 9 is a modification of the double aerosol container in FIG. 8a, and is provided with only the first annular step portion 33 in the body portion 32. The double aerosol container 30 c includes a bottomed cylindrical outer can 21, a bottomed cylindrical inner bag 35 placed on the bottom 21 a of the outer can 21, and a valve 23. The outer can 21 and the valve 23 are substantially the same as the double aerosol container 30b of FIG.
The body portion 32 of the inner bag 35 includes a cylindrical main body 37a, a first annular stepped portion 33 provided at the lower end thereof, and a cylindrical reduced diameter portion 37b parallel to the cylindrical main body 37a provided at the lower end thereof. have. The reduced diameter portion 37b continues to the bottom portion 21a. That is, a reduced diameter portion 37b having a diameter reduced from the bottom 21a within a specific height range is provided.
By providing the cylindrical reduced diameter portion 37b in this manner, unlike the case shown in FIG. 8, since the lower wall 34a of the second annular step portion 34 is not provided, only the upper wall portion 33a of the first annular step portion 33 is deformed. And can be prevented from overlapping with other parts. The curvature radius, angle, and depth of the first annular step portion 33 are appropriately designed according to the amount of pressing of the inner bag 35, similarly to the annular groove 32a of FIGS. 7a and 8a. In the double aerosol container 30c of FIG. 9, a plurality of first annular stepped portions 33 may be provided, and a plurality of cylindrical reduced diameter portions having different diameters may be provided so as to gradually decrease downward. In this case, the diameter of the reduced diameter part on the bottom side is the smallest, and the diameter of the reduced diameter part on the bottom is preferably made larger than that of the reduced diameter part on the bottom side so as to be continuous with the cylindrical body. Further, the first annular step portion 33 and the reduced diameter portion 37b are formed by impact molding, drawing molding or drawing ironing in addition to roll processing.

The double aerosol container 30 d shown in FIG. 10 a includes a bottomed cylindrical outer can 21, a bottomed cylindrical inner bag 38 placed on the bottom 21 a of the outer can 21, and a valve 23. The outer can 21 and the valve 23 are substantially the same as the outer can 21 and the valve 23 of FIG.
The inner bag 38 includes a bottom part 38a, a body part 39, and a neck part 38b (opening end) that is larger in diameter than the body part. It is manufactured by impact molding from a metal slag such as aluminum or by drawing and ironing from a metal plate such as aluminum in substantially the same manner as the inner bag 22 of FIG. In addition, the inner bag 38 is a state before the valve 23 is mounted on the outer can 21, and in a state where the bottom portion 38 a of the inner bag 38 is placed on the bottom portion 21 a of the outer can 21, the neck portion 38 b of the inner bag 38. Is configured to protrude upward from the curled portion 21c of the outer can 21.
The body portion 39 includes an annular thin portion 39a at the lower portion. The thin part 39a is formed in a part. A plurality may be provided as long as they are formed in part. By providing a plurality, the amount by which the inner bag 38 is pushed down can be increased. Such a thin portion 39a is formed by impact molding, composite molding obtained by adding iron molding after impact molding, or drawing ironing.
By providing the thin portion 39a in this way, when the inner bag 38 is pressed in the axial direction, as shown in FIG. 10b, the thin portion 39a is deformed so as to spread outward, and into the outer can 21 of the inner bag 38. Can be pushed in.

FIGS. 11 to 13 show another embodiment of the double aerosol container according to the present invention. When a propellant is filled between the outer can and the inner bag, the propeller is placed between the outer can and the inner bag. Forming a filling passage for the nozzle.
As shown in FIG. 11, the double aerosol container 40 includes a bottomed cylindrical outer can 41, a bottomed cylindrical inner bag 42 placed on the bottom 41a of the outer can 41, and a valve 43. Have. This double aerosol container 40 is provided with a gap S (see FIG. 12) between the inner bag 42 and the valve 43 before filling with the propellant, and the inner bag 42 is deformed when filling with the propellant. However, the gap S disappears or becomes small, and a propellant filling passage P (see FIG. 13) is formed between the inner bag 42 and the outer can 41.

  The outer can 41 is substantially the same as the outer can 21 of FIG. 3a, and is formed by impact molding from a metal slag such as aluminum or DI processing from a metal plate as shown in FIG. 41a, body part 41b, shoulder part 41c, neck part 41d, and recess 41e. And as for the outer can 41, the neck part 41d comprises an opening part, and the inner surface of the recess 41e becomes a site | part with the smallest cross-sectional shape in an opening part.

The inner bag 42 is substantially the same as the inner bag 22 of FIG. 3a, and is formed by impact molding from a metal slag such as aluminum, and is formed at the bottom 15, the cylindrical barrel 42a, and the barrel tip, A neck portion 42b (opening tip) that is larger in diameter than the portion is provided. Further, when the bottom portion 15 of the inner bag 42 is placed on the bottom portion 41 a of the outer can 41 before the valve 43 is attached to the outer can 41, the inner bag 42 has a neck portion 42 b of the inner bag 42 that is It is comprised so that it may protrude upwards from the upper end of 41 neck part 41d. The outer diameter of the body portion 42a of the inner bag 42 is configured to be substantially the same as the inner diameter of the recess 41e of the outer can 21 (the smallest portion of the cross-sectional shape of the opening of the outer can). Yes.
The bottom portion 15 of the inner bag 42 is substantially the same as the bottom portion 15 of FIG. 3d, and includes a disk-shaped flat portion 16 and a tapered portion 17 extending upward from the periphery thereof at an angle θ. However, any shape that can be easily deformed when a pressing force is applied in the axial direction may be used.

The valve 43 includes a cylindrical housing 45 that communicates with the inner bag 42, a stem 46 that is housed in the housing 45 so as to be movable up and down, a stem rubber 47 that closes a stem hole of the stem 46, and the stem 46. A spring 48 that biases upward and a cover 49 that covers the housing 45 are provided. The valve 43 is for fixing the valve 43 by caulking the lower end of the cover 49 to the recess 41 e of the outer can 41.
The housing 45 includes a cylindrical upper tube portion 45a, a flange portion 45b provided at the upper end thereof and projecting radially outward, and a lower tube portion 45c having a diameter smaller than that of the upper tube portion 45a at the lower end of the upper tube portion 45a. It has. The upper cylinder part 45a constitutes a fitting part of the housing, and the lower cylinder part 45b constitutes an inner bag deformation part of the housing. A communication hole 45 d that communicates with the inner bag 42 is provided at the lower end of the housing 45.
The neck portion 42b of the inner bag 42 is fitted to the upper tube portion 45a. On the other hand, although the trunk | drum 42a of the inner bag 42 is inserted in the lower cylinder part 45c, it is inserted leaving the clearance gap S between the lower cylinder part 45c and the trunk | drum 42c. This is different from the double aerosol container 20 of FIG. The flange portion 45 b is disposed on the upper end of the neck portion 41 a of the outer can 41 via a sealing material 44.
The cover 49 covers the housing 45 and the neck portion 41 d of the outer can 41, and a lower end thereof is caulked to the recess 41 e of the outer can 41, and the housing 45 is fixed to the outer can 41.

Since it is configured in this manner, as shown in FIG. 12, the inner bag 42 is accommodated in the outer can 41 and placed on the bottom surface of the outer can 41 before the contents and the propellant are filled. At this time, the body part 42 a of the inner bag 42 is lightly supported by the inner surface of the recess 41 e of the outer can 41, and the neck part 42 b of the inner bag 42 is positioned above the upper end of the neck part 41 d of the outer can 41. Next, the inner bag 42 is filled with the contents, and the upper tube portion 45 a of the housing 45 of the valve 43 is fitted into the neck portion 42 b of the inner bag 42. The contents may be filled from the valve 43 after the valve 43 is fixed to the outer can.
At this time, a space LS filled with a propellant is formed between the upper end of the neck portion 41 d of the outer can 41 and the body portion 42 a of the inner bag 42. This space LS becomes a supply space for filling the propellant. On the other hand, in the recess 41e of the outer can 41, the trunk portion 42a of the inner bag 42 is in a state of closing the opening of the outer can.
However, in this double aerosol container 40, a gap S is formed between the inner surface of the body part 42a of the inner bag 42 and the lower cylinder part 45c of the valve 43 at the same height as the recess 41e of the outer can 41. Yes. Therefore, as shown in FIG. 13, when the propellant is filled from the space LS, the body portion 42a of the inner bag 42 is pressed against the lower cylindrical portion 45c (inner bag deformed portion) of the housing of the valve 43 by the pressure of the propellant. And it deform | transforms so that the clearance gap S may be lose | disappeared. Along with this, a propellant filling passage P is formed between the recess 41 e of the outer can 41 and the body portion 42 a of the inner bag 42. At this time, since the inner bag 42 is made of metal, the elastic force acts on the neck portion 42b of the inner bag with the deformation of the body portion 42a, and the inner bag 42 does not fall out of the upper tube portion 45a (fitting portion), The filling passage P is formed by plastic deformation. In addition, since the opening part of the inner bag 42 is closely_contact | adhered with the upper cylinder part 45a, a propellant does not enter an inner bag.
After filling the propellant, the valve 43 is pushed down while deforming the bottom 15 of the inner bag 42, and the lower end of the cover 49 is clinched into the recess 41 e of the outer can 41.

As described above, the double aerosol container 40 has the inner bag 42 made of metal, so it is harder to bend than the conventional synthetic resin inner bag, but has a gap S in which the inner bag 42 is plastically deformed. Since the filling passage P is formed at the time of filling the propellant, the propellant can be quickly filled in the space between the outer can 41 and the inner bag 42 along the filling passage P. Therefore, the propellant can be prevented from leaking to the outside, and the propellant can be efficiently filled.
FIGS. 13 b, c, and d show other shapes of the outer shape of the lower cylindrical portion 45 c of the housing 45 of the valve 43. The outer shape of the lower tube portion 45c (inner bag deforming portion) is not particularly limited as long as it forms a gap S with the body portion 42a of the inner bag 42.
13B has a substantially rectangular shape (substantially square shape) in which a circle on the inner surface of the body portion 42a of the inner bag 42 is a circumscribed circle. Thus, at least four gaps S are formed between the inner surface (cylindrical shape) of the body portion 42a of the inner bag 42, and a space in which the body portion 42a of the inner bag 42 is deformed when the propellant is filled is obtained.
The cross section of the lower tube portion 45c of FIG. 13c has an octagonal shape in which the circle on the inner surface of the body portion 42a of the inner bag 42 is a circumscribed circle. As a result, at least eight gaps S are formed between the inner surface (cylindrical shape) of the body portion 42a of the inner bag 42, and a space in which the body portion 42a of the inner bag 42 is deformed when the propellant is filled is obtained. In this way, by setting the cross-sectional shape of the lower cylinder portion 45c to a shape in which the inner surface of the body portion 52a is a circumscribed circle or a shape that is incorporated in the circumscribed circle, the burden on the body portion 42a of the inner bag 42 is increased. The gap S is obtained without giving.
The cross section of the lower cylinder part 42c of FIG. 13d has a substantially oval shape whose major axis is larger than the inner diameter of the trunk part 42a and whose minor axis is smaller than the inner diameter of the trunk part 42a. Since the inner bag 42 is made of metal, a gap S can be formed between the inner bag 42 and the body portion 42a as long as there is a portion having a diameter smaller than the inner diameter of the body portion 42a.

The double aerosol container 40a shown in FIG. 14 has an annular sealing material between the upper cylindrical portion 45a and the lower cylindrical portion 45c of the housing, in that a through hole 49a is provided on the side surface of the lower cylindrical portion 45c of the housing 45 of the valve 43. Except for the point provided with 49b, it is substantially the same as the double aerosol container 40 of FIG.
Since the through hole 49a is provided in this way, as shown in FIG. 14B, the inner bag 42 connected to the valve 43 is placed before filling the propellant placed on the bottom surface of the outer can 41, and the valve 43, the valve 43 is opened by pushing down the stem 43, and the inner bag 42 is vacuumed from the stem 46, whereby an air flow from the through hole 49a into the housing of the valve 43 is formed. The body portion 42a of the inner bag 42 is deformed so as to close the gap S therebetween. At this time, when the stem 46 is pushed down, the lower end 46c of the stem 46 comes into contact with the lower surface 45e of the housing 45 and closes the communication hole 45d, whereby the air from the inner bag 42 to the housing 45 is formed. Therefore, the inner bag 42 can be deformed more reliably. For example, when vacuuming with the contents filled in the inner bag 42, the suction of the contents can be prevented by closing the communication hole 45d and vacuuming. However, the communication hole 45d may not be blocked by the stem 46.
After the filling passage P is formed, the propellant is filled and the valve is fixed.
As described above, the double aerosol container 40 a is formed by the propellant filling passage P formed between the inner bag 42 and the valve 43 before the propellant is filled.

  The double aerosol container according to the present invention can be widely used as an aerosol container for storing pharmaceuticals, quasi drugs, cosmetics, foods, adhesives and the like.

DESCRIPTION OF SYMBOLS 10 Double aerosol container 11 Outer can 11a Bottom part 11b Shoulder part 11c Curl part 12 Inner bag 12a Body part 12b Flange part 13 Valve 13a Housing 13b Stem 14 Mounting cup 14a Standing wall 14b Valve holding part 14c Connection part 14d Annular flange part 15 Bottom part 16 Flat portion 17 Tapered portion 18 Sealing material 20, 20a, 20b, 20c, 20d, 20e Double aerosol container 21 Outer can 21a Bottom portion 21b Shoulder portion 21c Neck portion 21d Recess 22 Inner bag 22a Body portion 22b Neck portion 23 Valve 23a Stem 23b Cover 24 Seal material 25 Housing 25a Upper cylinder part 25b Flange part 25c Lower cylinder part 25d Communication hole 26 Dual aerosol container 27 Discharge device 28 Connecting body 29 Spout 29a Stem engagement part 29b Discharge 30a, b, c, d Double aerosol container 31 Inner bag 31a Bottom part 31b Neck part 32 Body part 32a Annular groove 32b Cylindrical part 33 First annular step part 33a Upper wall 34 Second annular step part 34a Lower wall 35 Inner bag 35a Annular Groove 36 Connecting portion 37a Main body 37b Reduced diameter portion 38 Inner bag 38a Bottom portion 38b Neck portion 39 Body portion 39a Thin portion 40, 40a Double aerosol container 41 Outer can 41a Bottom portion 41b Body portion 41c Shoulder portion 41d Neck portion 41e Recess 42 Body part 42b Neck part 43 Valve 44 Sealing material 45 Housing 45a Upper cylinder part 45b Flange part 45c Lower cylinder part 45d Communication hole 46 Stem 47 Stem rubber 48 Spring 49 Cover 49a Through hole

Claims (10)

An outer can, an inner bag accommodated in the inner canister and filled with contents; a valve communicating with the inner bag and attached to the outer can; and a propellant disposed between the outer can and the inner bag In a double aerosol container that is filled and when the valve is opened, the inner bag is compressed and deformed by the pressure of its propellant, and the contents are discharged.
When the inner bag is placed on the bottom of the outer can, the inner bag is made of a metal with a bottomed cylindrical shape so that the opening of the inner bag protrudes upward from the opening of the outer can, and the axial direction Has a deformed part that shrinks,
A double aerosol container in which an axial pressing force is applied to the inner bag to deform the deforming portion and the valve is attached to the outer can. The double aerosol container according to claim 1, wherein the inner bag is formed from aluminum. The double aerosol container of Claim 1 with which the said deformation | transformation part is provided in the bottom part of the inner bag. The double aerosol container of Claim 1 with which the said deformation | transformation part is provided in the trunk | drum of an inner bag. The double aerosol container according to claim 1, wherein the deformed portion has a shape in which an outer diameter is reduced downward. The double aerosol container of Claim 1 whose said deformation | transformation part is the step part formed in the trunk | drum of the said inner bag. The double aerosol container of Claim 1 whose said deformation | transformation part is a thin part formed in a part of trunk | drum of the said inner bag. The wall thickness of the bottom of the inner bag was set to 1 to 2 times the wall thickness of the trunk,
The double aerosol container according to any one of claims 1 to 7. The valve includes a cylindrical housing communicating with the inside of the inner bag;
The housing includes a cylindrical fitting portion that fits into the opening portion of the inner bag, and a cylindrical inner bag that is provided below the fitting portion and has a cross-sectional shape smaller than that of the opening portion of the outer can. A deformation part,
When the inner bag is fitted to the fitting portion of the housing, a gap is formed between the inner bag and the inner bag deformation portion,
A propellant filling passage can be formed by pressing the inner bag against the inner bag deforming portion and deforming the gap in a direction that causes the gap to disappear.
The double aerosol container according to claim 1. The inner bag deformed portion is formed with a discharge hole communicating between the inside and the outside.
The double aerosol container according to claim 9.