JP2605083B2 - Valve on the bottom side of the aerosol container - Google Patents

Description

The present invention relates to a valve on the bottom side of an aerosol container.
More specifically, the present invention relates to a valve on the bottom side of an aerosol container that can be filled with gas into the aerosol container from the bottom side and that can easily release gas when the aerosol container is discarded.

[Prior Art] Conventionally, in order to accommodate the content to be ejected and the propellant so as not to be mixed, a flexible inner bag is provided in an aerosol container, and the inner bag is pressurized gas such as a propellant. A double aerosol container is known in which the contents in the inner bag are released to the outside by pressing the inner bag to the outside, and is widely used in cosmetics, caulks and the like.

Also known is a so-called two-component mixed aerosol in which a piston-shaped movable partition is installed instead of an inner bag, and two components that need to be mixed for the first time during use are separately accommodated via a partition wall. Products are also known.

The aerosol container provided with the inner bag includes a bead (1a) formed at the mouth of the outer cylinder and a bead (1a) formed at the mouth of the outer cylinder when the inner bag (see FIG. 8 (4)) is suspended and clinched. Gas is often filled from the gap between the flange (4a). When the aerosol container is discarded, a thin portion formed on the bottom of the aerosol container is pressed with a pin from the outside to break it, and gas is released.

Further, in the piston type aerosol container or the two-component aerosol product, as shown in FIG. 9, an opening (50a) is formed in the bottom (50) of the aerosol container, and the opening (50a) is formed. In some cases, the aerosol container is filled with a gas or a stock solution, and then a rubber stopper (51) is plugged into the opening (50a) to seal the container. When the aerosol container is discarded, the rubber stopper (51) is pulled out from the opening (50a) to release gas.

[Problem to be Solved by the Invention] Among conventional aerosol containers, an aerosol container having a thin portion at a bottom portion (50) without forming an opening (50a) is formed at a mouth portion of an outer cylinder. Since the gas is filled from between the bead and the flange portion of the inner bag, the filling operation is extremely troublesome, and the filling efficiency is low.

Also, as shown in FIG. 9, the bottom of the aerosol container (5
After filling the gas through the opening (50a) of (0), a rubber stopper (5
The aerosol container of the type which is sealed by plugging 1) has a drawback that it is necessary to plug the rubber stopper (51) into the opening (50a), and a device for that is required. . When disposing, put the rubber stopper (51) in the opening (50a).
From the outside, and there is a problem that the operation of releasing gas is extremely difficult.

On the other hand, a method has been proposed in which a valve is fixed to the bottom side of the aerosol container with a normal mount cap, or a check valve or the like separate from the container is fixed to the bottom (Japanese Utility Model Application Laid-Open No. 58-151470). And the like, see Japanese Utility Model Application Laid-Open No. 58-82870, etc.), all of which have problems such as a large number of parts and a large number of pre-assembly manufacturing steps, and have not been put to practical use.

The present invention has been made in view of such a conventional problem, and the operation of filling and discharging gas into the aerosol container from the bottom side can be performed easily and efficiently, and the airtightness in the aerosol container can be improved. It is an object of the present invention to provide a simple and inexpensive valve on the bottom side of an aerosol container capable of maintaining the property.

Means for Solving the Problems The valve on the bottom side of the aerosol container of the present invention is formed integrally with the bottom of the aerosol container, has a locking portion inside, and communicates with the inside of the aerosol container. A valve holding cylinder having an opening, inserted into the valve holding cylinder, the upward movement is locked by the locking portion, and the opening is communicated with the outside by a pressing operation from below. A valve body and a caulking portion extending integrally from a lower end of the valve holding cylinder and being caulked to a lower end side of the valve body; the valve body is a rubber-like elastic body; And a sealing action between the lower end surface of the elastic body and the caulking portion by the elastic force of the elastic body compressed and held by the portion.

In a second aspect of the valve of the present invention, the opening and the locking portion are formed on the top plate of the valve holding cylinder, and between the upper end surface of the elastic body and the top plate, and between the side surface of the elastic body and the valve. Communication passages are provided between the side walls of the holding cylinder and communicate with each other in order.

Further, in a third aspect of the present invention, a valve holding cylinder integrally formed with a bottom portion of an aerosol container, having a formed portion therein, and having an opening communicating with the inside of the aerosol container, A valve body that is inserted into the cylinder and is locked upward by the locking portion, and communicates between the outside and the opening by a pressing operation from below, and is integrally formed from near the lower end of the valve holding cylinder. And a caulking portion holding the lower end side of the valve body by being caulked inward, the opening is formed in the center of the top plate, and the valve body is locked. An elastic body having a peripheral portion engaging with the portion and a central portion serving as a seal portion, and having a communication hole around the central portion, wherein the central portion is sandwiched between the elastic body and a caulking portion. Sea between And a ring-shaped hollow body performing an operation.

[Operation] In the first embodiment, the valve body is housed in the valve holding cylinder, but the upper end side of the valve body is a locking portion of the valve holding cylinder, and the lower end side is firmly held by the caulking part directly or via an intervening object. Is done. Further, since the top plate, the body portion and the caulking portion of the valve holding cylinder are integrated, the entire seal is secured, and the number of parts is small and the number of assembling steps is small.

The lower surface of the central portion of the valve body is not covered with the swaged portion and is exposed to the outside, so that the valve body can be pressed from the outside directly or via an intervening object. That is, when the valve body is pressed upward from the outside, the outside and the opening communicate with each other, so that the gas can be charged or the gas can be released.

In the second aspect, when the elastic body is pushed in from the outside, the sealing action between the lower end surface of the elastic body and the caulked portion is released, and the space between the side surface of the elastic body and the side wall of the valve holding cylinder, the upper surface of the elastic body, The outside and the inside of the aerosol container communicate with each other between the valve holding cylinder and the top plate and through the opening of the top plate.

In the third aspect, when the elastic body is pushed in from the outside, the sealing action between the sealing portion at the center of the elastic body and the hollow body is released, and the outside and the aerosol are passed through the hole of the elastic body and the opening of the top plate. It communicates with the inside of the container.

[Example] Next, a valve of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the valve of the present invention, FIG. 2 is a partially sectional perspective view showing a state before assembling the valve shown in FIG. 1, and FIG. 3 is a valve shown in FIG. FIG. 4 is a cross-sectional view showing another embodiment of the valve of the present invention, FIG. 5 is a cross-sectional view showing a state before the swaged portion of the valve shown in FIG. 4, and FIG. 6 is a cross-sectional view showing the state of use of the valve shown in FIG. 4, FIG. 7 is a cross-sectional view showing still another embodiment of the valve of the present invention, and FIG. 8 is an aerosol equipped with the valve of the present invention. It is sectional drawing which shows an example of a container.

The valve (A) shown in FIG. 1 has a valve holding cylinder (6) formed integrally with the body (1) and the bottom (2) of the aerosol container. An elastic body (7) is inserted as a valve body, and is held by a caulking portion (8).

The body (1) and the bottom (2) of the aerosol container are formed integrally from a metal such as aluminum, for example, simultaneously by impact molding. Further, at the same time or in a subsequent process, the bottomed cylindrical valve holding portion (6)
Are formed toward the upper center part of the bottom part (2).

A projection (10) is provided below the center of the top plate (9) of the valve holding cylinder (6) as a locking portion, and a plurality of holes (11) are formed around the projection as openings. Protrusions (1
0) and the hole (11) may be formed at the same time as the impact molding described above, or may be performed in a later step.

The elastic body (7) inserted into the valve holding cylinder (6) is formed in a cylindrical shape from an elastic material such as rubber, and has an axial groove (12) on its outer peripheral surface as shown in FIG. Is provided. Therefore, when the elastic body (7) is inserted into the valve holding cylinder (6), the upper end surface (13) of the elastic body (7) is supported by the projection (10), and an annular gap (14) is formed. The gap (14) communicates with the groove (12) to form a communication passage.

The caulking portion (8) is initially formed as a thin cylindrical member extending downward from the bottom portion (2) as shown in FIG. 2. For example, impact shaping of the body portion (1) and the bottom portion (2) is performed. Sometimes it can be formed by extrusion forward.
The caulking portion (8) is bent inward after the elastic body (7) is inserted into the valve holding cylinder (6), and is caulked to the peripheral portion (15) of the lower end surface of the elastic body (7). As a result, the elastic body (7) is somewhat compressed in the axial direction, and the elasticity of the elastic body (7) seals between the peripheral portion (15) and the inner surface of the caulked portion (8).

The valve (A) configured as described above is operated by pressing an exposed portion of the elastic body (7) from the outside as shown in FIG. That is, as shown in FIG. 3, by pressing in the direction of arrow (P) with the push-up rod (30), a gap is created between the sealed peripheral edge (15) and the swaged portion (8), Therefore, the outside and the inside of the aerosol container communicate with each other, so that the propellant and the like can be freely charged and discharged. Further, once the propellant is filled in the aerosol container, the elastic body (7) is pushed downward by the internal pressure, and the sealing action with the caulking portion (8) is further ensured.

Although the valve (A) shown in FIGS. 1 to 3 uses an elastic body (7) made of one piece as a valve body, the valve body in the present invention is not limited to such a case. The same effect can be obtained by combining two or more types of components such as inserting a coil spring and a plug such as a synthetic resin piston or ball into the valve holding cylinder (6) in that order. .

Further, a ring-shaped retainer or the like may be interposed between the elastic body (7) or the piston and the caulking portion (8).

4 to 6 show preferred examples of such a case.

In the valve (B) shown in FIG. 4, an elastic body (17) is provided in a valve holding cylinder (6) drilled below the center of the bottom (2).
Valve body and hollow body for mounting (18)
And have been inserted. The valve holding cylinder (6) of the valve (B) is also formed at the same time as the body (1) and the bottom (2) by the impact molding method, and protrudes below the bottom (2). A relatively large opening (21) is formed at the center of the top plate (9) of the valve holding cylinder (6). This opening (21) is formed either simultaneously with the impact molding or by post-processing.

In the valve holding tube (6), a peripheral portion (17a) made of an elastic material such as rubber as shown in FIG. 5 has a ring-like shape and a central seal portion (17b) has a lens-like shape. A disk-shaped elastic body (17) is inserted as a whole, and its peripheral portion (17a) is inside a locking projection (22) which is a locking portion formed on the outer peripheral side surface of the opening (21). It is locked to. A plurality of holes (17d) are formed in a relatively thin portion (17c) between the seal portion (17b) and the peripheral portion (17a) of the elastic body (17).

Below the elastic body (7), as shown in FIG. 5, a small diameter portion (24) having an opening (23), a tapered portion (25) continuous with the small diameter portion (24), and a tapered portion (25). ), A hollow body (18) consisting of a ring (26) continuous with the lower end is inserted. The shoulder (18b), which is the upper surface of the ring (26) of the hollow body (18), is crimped to the lower side of the peripheral part (17a) of the elastic body (6) when assembled as shown in FIG. Perimeter (17
a) is securely fixed to the locking projection (22). At this time, the peripheral portion (17a) pulls the seal portion (17b) downward, and at the same time, the lower surface of the top plate (9) and the shoulder portion (18) of the hollow body (18).
b) plays a role of packing to prevent gas leakage from inside the aerosol container by sealing between them.

The upper end of the small diameter portion (24) of the hollow body (18) is elastically pressed under the seal portion (17b).

The bottom (18c) of the hollow body (18), that is, the ring (2
6) On the lower surface, a swaged portion (8) formed by the tip of the valve holding cylinder (6) is bent inward so that the elastic body (17) and the hollow body (18) are formed. It is housed in the valve holding cylinder (6) in close contact.

Next, the operation of the valve (B) configured as described above will be described.

Since the periphery (17a) of the elastic body (17) is pressed from below by the shoulder (18b) of the hollow body (18), the locking projection (22) formed in the valve holding cylinder (6). Is securely locked. The sealing part (17b) of the elastic body (17)
It is locked by the small diameter part (24) of the hollow body (18) pushed upward by the swaged part (8) of the valve holding cylinder (6). Therefore, the seal portion (17b) is pressed against the upper end of the small-diameter portion (24) in a state where the seal portion (17b) is always pulled in the direction of the peripheral portion (17a) by the elastic force of bending and pulling of the thin portion (17c).

When the valve (B) is released, as shown in FIG. 6, the protruding rod (30) is inserted into the opening (23) of the hollow body (18), and the tip of the rod is inserted into the elastic body (17). ) Abuts on the lower surface of the seal portion (17a) and pushes up the seal portion (17a) which is pulled in the direction of the peripheral portion (17a). Then, the engagement between the seal portion (17a) and the small diameter portion (24) is released, and the valve (B)
To the released state.

In this state, when gas flows in from the opening (23) of the hollow body (18), the gas flows from the opening (23) into the hole (17d) formed in the elastic body (17) and the opening in the top plate (9). The inside of the aerosol container is filled through the part (21).

When the raised rod (30) is lowered after filling, the seal (17b)
Is pulled in the direction of the peripheral portion (17a), the seal portion (17b) is elastically pressed against the small-diameter portion (24) of the hollow body (18), and the valve (B) is closed. In addition, the sealing performance between the seal portion (17b) and the upper surface of the small-diameter portion (24) is further ensured by the internal pressure of the aerosol container, and the aerosol container is kept airtight.

Next, when the aerosol container is discarded, the gas in the aerosol container must be released to the outside. In this case, as in the above case, the distal end of the protruding rod (30) is inserted into the opening (23) of the hollow body (18), and the seal (17b) of the elastic body (17) is pushed upward. The gas can be released to the outside more easily.

The valve (C) shown in FIG. 7 has substantially the same configuration as the valve (B). The difference from the valve (B) is that a plurality of holes (24a) are radially formed in the small-diameter portion (24) of the hollow body (18), and the sealing portion (17b) of the elastic body (17) is hollow. (18) is that the hole (24a) is deeply pressed into the opening (23), and the hole (24a) is closed inside the opening (23). The hole (24a) of the small diameter portion (24) is the hole (17d) of the elastic body (17) and the opening (2) of the top plate (9).
It communicates with the inside of the aerosol container via 1).

This is similar to the case shown in FIG.
0) pushes up the seal part (17b) upwards to
Unblock the hole (24a) by b), and remove the hole (24a) of the hollow body (18), the hole (17d) of the elastic body (7) and the opening (21).
The gas or the like can be charged or discharged into the aerosol container through a passage composed of.

Although the valve (B) and the valve (C) protrude below the bottom (2) of the aerosol container, when provided on an aerosol container having an inwardly curved bottom (2) as shown in FIG. In particular, there is no problem that makes the aerosol container unstable. If provided on an aerosol container having a relatively flat bottom (2) as shown in FIG. 1, a valve holder projecting upward from the bottom (2) in the same manner as the valve (A) shown in FIG. What is necessary is just to employ | adopt a cylinder (6).

In FIG. 8, (4) is an inner bag made of aluminum foil, synthetic resin or a laminate thereof, (4a) is a flange portion of the inner bag (4),
(9) is a mounting cup of the upper valve. The mounting cup (9) of the upper valve is crimped to the bead (1a) at the upper end of the body (1) with the flange (4a) interposed therebetween.

In addition to the double aerosol container, the valve of the present invention can be employed in any aerosol container, such as a so-called piston can or back-in can, which can fill a propellant or contents from the bottom side.

[Effects of the Invention] As described above, by employing the valve of the present invention, the operation of filling and discharging gas into the aerosol container can be performed easily and efficiently, and the airtightness in the aerosol container can be improved. Can be held. In addition, since the number of parts constituting the valve is small, there is an effect that it is economical and suitable for mass production.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a valve according to the present invention.
FIG. 3 is a partially sectional perspective view showing a state before assembling the valve shown in FIG. 1, FIG. 3 is a sectional view showing an operation state of the valve shown in FIG. 1, and FIG. 4 is another valve of the present invention. FIG. 5 is a cross-sectional view showing an embodiment, FIG. 5 is a cross-sectional view showing a state before bending a swaged portion of the valve shown in FIG. 4, FIG. 6 is a cross-sectional view showing a state when the valve shown in FIG. FIG. 7 is a cross-sectional view showing still another embodiment of the valve of the present invention, FIG. 8 is a cross-sectional view showing an example of an aerosol container provided with the valve of the present invention, and FIG. It is sectional drawing which shows an example of a mechanism. (Main symbols in the drawings) (A), (B) (C): Valve (1): Body (2): Bottom (6): Valve holding cylinder (7), (17): Elastic body (8): Caulking part (9): Top plate (11): Hole (12): Groove (18): Hollow body (21): Opening

Continued on the front page (72) Inventor Kenhisa Utsugi 1-1-10, Kamikae-cho, Toyama City, Toyama Prefecture Inside Takeuchi Press Industry Co., Ltd. (72) Inventor Masumi Mizukawa 987-10, Suzuya, Oji, Yono City, Saitama Prefecture References Japanese Utility Model Showa 64-14681 (JP, U)

Claims (3)

(57) [Claims] 1. A valve holding cylinder integrally formed on the bottom of an aerosol container, having a locking portion therein and having an opening communicating with the inside of the aerosol container, and inserted into the valve holding cylinder. The upward movement is locked by the locking portion, and a valve body that allows communication between the outside and the opening portion by a pressing operation from below is provided. A caulking portion crimped to the lower end side of the valve body, wherein the valve body is a rubber-like elastic body, and the elastic body is compressed by the locking portion and the caulking portion and is held by the elastic force of the elastic body. A valve on the bottom side of the aerosol container which is adapted to perform a sealing action between a lower end surface of the elastic body and the caulking portion. 2. The valve device according to claim 2, wherein the opening and the locking portion are formed in a top plate of the valve holding cylinder, and between an upper end surface of the elastic body and the top plate and between a side surface of the elastic body and a side wall of the valve holding cylinder. 2. The valve according to claim 1, wherein communication passages are provided between the valves so as to communicate with each other. 3. A valve holding cylinder formed integrally with the bottom of the aerosol container, having a formed portion therein and having an opening communicating with the inside of the aerosol container, and inserted into the valve holding cylinder. While the upward movement is locked by the locking portion, and a valve body that communicates between the outside and the opening by a pressing operation from below, the valve body extends integrally from the vicinity of the lower end of the valve holding cylinder, A caulking portion that holds the lower end side of the valve body by being caulked inward, the opening is formed at the center of the top plate of the valve holding cylinder, and the valve body is locked A plate-like elastic body having a peripheral portion engaging with the portion and a central portion serving as a seal portion and having a hole around the central portion, and being sandwiched between the elastic body and the caulking portion. With the seal part In the bottom side of the valve of the aerosol container made comprises a ring-shaped hollow body exhibits a sealing action.