JP3709021B2 - Cut rubber for aerosol containers - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a cut rubber used for an aerosol container in which an undercup is filled in a propellant.
[0002]
[Prior art]
Conventionally, an under-cup filling method is known as one of the methods for filling an aerosol container with a propellant. In this method, the arcuate part of the mouten cup is arranged facing the curl part of the container body of the aerosol container, and the liquefied gas propellant is filled into the container body from the distance between the arcuate part and the curl part. This filling method is frequently used because it has good filling efficiency and can be filled with a propellant in a short time.
[0003]
Moreover, in order to maintain the airtightness of the filled aerosol container, a gasket is interposed between the arc-shaped portion and the curled portion. This gasket has been conventionally performed by baking rubber on the inner surface of the arcuate portion.
[0004]
This baking method has been excellent in stably arranging the gasket on the inner surface of the arc-shaped portion. However, this baking method is no longer used because it generates toxic gas during baking and has an adverse effect on the environment. At present, a cut rubber formed by cutting a plate-like rubber is used instead of baking the gasket. Undercut filling of the propellant is performed in a state where the cut rubber is mounted on the inner surface of the arc-shaped portion.
[0005]
[Problems to be solved by the invention]
However, if the undercup filling of the propellant is performed with the cut rubber mounted on the inner surface of the arcuate portion, the propellant inevitably flows into the gap between the cut rubber and the arcuate portion during the filling operation. If the mauten cup is fixed to the curled portion in this state, the liquefied gas propellant is sealed at the interval between the cut rubber and the arc-shaped portion.
[0006]
When this sealed liquefied gas propellant presses and adheres the mauten cup to the curled portion, as shown in FIG. 13, there is a possibility that the cut rubber is pushed out to the outside by the expansion pressure from the distance between the arc-shaped portion and the curled portion. It is increasing. This extrusion of the cut rubber is not only undesirable in terms of design, but also causes gas leakage inside the aerosol container.
[0007]
In order to solve the problems as described above, the present invention prevents a situation in which the cut rubber protrudes from the gap between the arc-shaped portion and the curled portion while using a cut rubber that does not generate toxic gas during work. It is intended to prevent airtight leakage or the like from occurring.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an annular cut interposed between an outer surface of an annular curl portion formed in an opening of a container body and an annular arc-shaped portion of a mauten cup corresponding to the curled portion. In the rubber, with this cut rubber mounted on the inner surface of the arcuate portion, a communication path that connects the inner surface of the arcuate portion and the outer surface side of the cut rubber is provided with protrusions at regular intervals on the inner periphery of the cut rubber. Thus, the protrusion is formed in the thickness direction of the interval between the protrusions .
[0009]
[Action]
Since the present invention is configured as described above, in order to fix the mauten cup to the curl portion of the container body and fill the aerosol container with the liquefied gas propellant, first set a cut rubber on the annular arc-shaped portion of the mouten cup. To do. Next, undercup filling is performed with the cut rubber facing the curled portion. This undercup filling is performed using a conventionally known undercup filling apparatus. In short, the liquefied gas propellant is filled from the interval between the mauten cup and the curled portion.
[0010]
By this filling, the liquefied gas propellant is filled into the container body, but the liquefied gas propellant inevitably flows also between the cut rubber and the inner surface of the arcuate portion of the mauten cup. At the same time as the filling of the propellant is completed, the arcuate portion of the mauten cup is strongly pressed against the curled portion and fixed by caulking.
[0011]
The liquefied gas propellant that has flowed between the cut rubber and the inner surface of the arcuate portion of the Mauten cup during the caulking is discharged to the outside through the communication path. The communication path is formed at intervals between the protrusions by providing protrusions at regular intervals on the outer periphery or inner periphery or both of the cut rubber, or by forming a concave groove on the inner periphery of the cut rubber. The cut rubber is formed by providing a concave groove on the outer periphery, or is formed by providing continuous irregularities on the inner periphery and / or the outer periphery of the cut rubber.
[0012]
Therefore, the liquefied gas propellant inevitably flowing between the cut rubber and the inner surface of the arcuate part of the mouten cup is discharged to the outside through the communication path until the cut rubber is pressed and adhered to the inner surface of the arcuate part. Is done. Further, when the cut rubber is pressed and brought into close contact with the inner surface of the arc-shaped portion, the cut rubber is strongly pressed and compressed by the curled portion against the inner surface of the arc-shaped portion, thereby closing the communication path. Therefore, when using a normal aerosol container, there is no possibility that the propellant inside the aerosol container flows out to the outside through the communication path. This state is exactly the same when the communication path is formed by providing a through hole in the thickness direction of the cut rubber.
[0013]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. (1) is a container body, and an annular curled portion (3) is formed at the upper end of an opening (2). An annular arcuate portion (4) corresponding to the outer surface of the curled portion (3) is formed on the outer periphery of the mauten cup (5).
[0014]
The mouten cup (5) has the valve mechanism (7) connected and fixed to the central upright part (6), and the stem (8) of the valve mechanism (7) protrudes from the upper end of the upright part (6). The housing (10) of the valve mechanism (7) protrudes from the lower end of (6).
[0015]
An annular cut rubber (11) is mounted on the inner surface (9) of the annular arcuate portion (4) of the mouten cup (5). This cut rubber (11) is attached to the inner surface (9) of the arcuate portion (4) and communicates with the inner surface (9) of the arcuate portion (4) and the outer surface side of the cut rubber (11) ( 12) is formed in the thickness direction. This communication path (12) can be formed by providing a certain gap between the inner periphery or outer periphery of the annular cut rubber (11) and the inner surface (9) of the arcuate portion (4).
[0016]
For example, as shown in FIGS. 4 and 5, protrusions (13) are provided at regular intervals on the outer periphery of the cut rubber (11). This protrusion (13) contacts the inner surface (9) of the arcuate part (4), and the interval between the protrusions (13) is not in contact with the inner surface (9) of the arcuate part (4). A part becomes a communicating path (12).
[0017]
Further, the communication path (12) does not need to be formed only on the outer periphery of the cut rubber (11). In other methods, as shown in FIG. 4 and FIG. By projecting 13), the inner peripheral projection (13) comes into contact with the inner surface (9) of the arc-shaped portion (4), and the interval between the inner peripheral projecting portions (13) is the inner surface (9) of the arc-shaped portion (4). ) And the non-contact state, the non-contact portion may be formed to be the communication path (12).
[0018]
Further, as shown in FIGS. 5, 8, and 9, the communication path (12) is provided with a groove (14) on the inner periphery of the cut rubber (11) so that the groove (14) It may be formed as 12). Further, the communication path (12) may be formed by providing a concave groove (14) on the outer periphery of the cut rubber (11) as shown in FIG.
[0019]
Further, the communication path (12) may be formed by providing continuous irregularities (15) on the inner periphery of the cut rubber (11) as shown in FIG. In this case, even if some unevennesses (15) are closed by contact with the arcuate portion (4), other unevennesses (15) can secure a space and form a reliable communication path (12). . Moreover, if this continuous unevenness | corrugation (15) is provided in the inner periphery and outer periphery of a cut rubber (11) and forms a communicating path (12) as shown in FIG. 11, a communicating path (12) will be more reliably formed. Can be secured.
[0020]
In the above embodiment, the communication path (12) has a gap formed between the arcuate portion (4) and the cut rubber (11), and this gap is used as the communication path (12). However, in another different embodiment, as shown in FIG. 12, the communication path (12) is formed by providing a through hole (16) in the thickness direction of the cut rubber (11). By forming the through hole (16) in this way, there is a problem that the gap, that is, the opening amount of the communication path (12) differs depending on the contact between the inner surface (9) of the arcuate portion (4) and the cut rubber (11). It is possible to always ensure a communication path (12) having a constant area.
[0021]
In order to fill the aerosol container with the liquefied gas propellant (17), the mauten cup (5) is fixed to the curled portion (3) of the container body (1) and the aerosol container is filled with the mouten cup (5). The cut rubber (11) is set on the annular arcuate part (4). In this set state, no strong pressing force or the like is applied to the cut rubber (11), and the cut rubber (11) is gently inserted into the arcuate portion (4). Next, undercut filling is performed with the cut rubber (11) facing the curled portion (3).
[0022]
This undercup filling is performed using a conventionally known undercup filling apparatus. In short, the liquefied gas propellant (17) is filled from the interval between the mauten cup (5) and the curled portion (3). By this filling, the liquefied gas propellant (17) is filled in the container body (1), and the liquefied gas propellant (17) is simultaneously cut into the arc (4) of the cut rubber (11) and the mouten cup (5). It inevitably flows in between the inner surface (9). At the same time as the filling of the propellant is completed, the arcuate portion (4) of the mauten cup (5) is strongly pressed against the curled portion (3) to fix it.
[0023]
During the caulking, the liquefied gas propellant (17) flowing between the cut rubber (11) and the inner surface (9) of the arcuate portion (4) of the mauten cup (5) passes through the communication passage (12). It is discharged outside. This discharge is performed as follows. That is, by providing the protrusions (13) at regular intervals on the outer periphery or inner periphery of the cut rubber (11) or by providing the concave grooves (14), the interval between the protrusions (13) and the arc-shaped portion (4) A communication path (12) is formed between the inner surface (9) and the concave groove (14) acts as the communication path (12). This communication path (12) is used for the liquefied gas propellant (17) flowing between the cut rubber (11) and the arcuate part (4), and the cut rubber (11) is used for the inner surface (9) of the arcuate part (4). In the process until it presses and adheres, it is discharged to the outside through the communication path (12).
[0024]
When the cut rubber (11) is strongly pressed and compressed and brought into close contact with the inner surface (9) of the arcuate portion (4) by the curled portion (3), the cut rubber (11) is deformed by the strong compression and the communication path (12 ) Is closed. Therefore, during normal use of the finished aerosol container (18), the liquefied gas propellant (17) inside the aerosol container (18) may flow out to the outside through the communication path (12). Not at all. This state is exactly the same in the case where the communication path (12) is formed by providing the through hole (16) in the thickness direction of the cut rubber (11).
[0025]
【The invention's effect】
Since the present invention is configured as described above, the liquefied gas propellant that flows between the cut rubber and the arcuate portion when filling the undercup is discharged to the outside in the process of fixing the mauten cup to the curled portion. Further, it is possible to prevent a situation in which it protrudes from the gap between the arc-shaped portion and the curled portion, and to obtain an aerosol container that does not cause an airtight leak and is preferable in terms of design.
[0026]
Further, since cut rubber is used for the gasket, no toxic gas is generated during operation.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state before a mauten cup is fixed to a curled portion.
FIG. 2 is an enlarged cross-sectional view of an arc-shaped portion showing an undercup filling state.
FIG. 3 is an enlarged cross-sectional view of a state where a mauten cup is fixed to an arcuate portion using the cut rubber of the present invention.
FIG. 4 is a plan view of a cut rubber in a state where protrusions are formed on the inner periphery and the outer periphery.
FIG. 5 is a plan view of a cut rubber in a state in which a protrusion is formed on the outer periphery and a concave groove is formed on the inner periphery.
FIG. 6 is a plan view of a cut rubber in a state in which a protrusion is formed on the inner periphery.
FIG. 7 is a plan view of a cut rubber in a state in which a protrusion is formed on the inner periphery and a concave groove is formed on the outer periphery.
FIG. 8 is a plan view of a cut rubber in a state where a concave groove is formed on the inner periphery.
FIG. 9 is a plan view of a cut rubber in a state where concave grooves are formed on an inner periphery and an outer periphery.
FIG. 10 is a plan view of a cut rubber in a state where irregularities are continuously formed on the inner periphery.
FIG. 11 is a plan view of a cut rubber in a state where irregularities are continuously formed on the inner periphery and the outer periphery.
FIG. 12 is a plan view of a cut rubber in a state in which through holes are formed in the thickness direction.
FIG. 13 is an enlarged cross-sectional view of a state in which a mauten cup is fixed to an arcuate portion using a cut rubber of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container body 2 Opening 3 Curl part 4 Arc-shaped part 5 Mauten cup 9 Inner surface 11 Cut rubber 12 Communication path 13 Protrusion part 14 Concave groove 15 Concavity and convexity 16 Through-hole

Claims (1)

An annular cut rubber interposed between an outer surface of an annular curl portion formed in an opening of a container body and an annular arc-shaped portion of a mauten cup corresponding to the curled portion, and the cut rubber is connected to an inner surface of the arc-shaped portion. The communication path that connects the inner surface of the arcuate portion and the outer surface side of the cut rubber is provided in the thickness direction of the interval between the protrusions by providing protrusions at regular intervals on the inner periphery of the cut rubber. Cut rubber for aerosol containers.

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