JP4322326B2 - Mouth seal structure of plastic pumping container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a bottom plate is provided and a cylindrical outer cylinder is inserted into a metal cylindrical container formed upward from the bottom plate so as to be attachable / detachable, and the stored storage liquid is pumped by gas injection. The present invention relates to a mouth seal structure of a plastic pumping container.
[0002]
[Prior art]
Conventionally, as this kind of thing, there exists a thing as shown, for example in FIG.
[0003]
That is, FIG. 5 shows a mouth seal structure of a plastic container inserted into a metal cylindrical container, and is used for press-fitting and pumping on the outer surface side of the lid 4 that closes the mouth 3 of the plastic container 1. Cablas 6 and 7 are attached, a seal groove 8 is provided on the inner surface side, and a lid 4 into which an O-ring 8 a is inserted is fitted into the mouth 3.
[0004]
Then, a hat-shaped presser hat 5 having an opening at the center is covered from above, and an inner screw portion 5 a provided on the inner side surface of the hat 5 is screwed to an outer screw portion 3 b provided on the outer side surface of the mouth portion 3. The O-ring 8a fitted into the seal groove 8 is screwed to the position where it can be pressed and deformed to a predetermined dimension by the extending part 3a of the mouth part 3.
[0005]
Then, the hat flange 5b of the presser hat 5 is placed on a fixed boss 13a provided on the upper plate 13 of the metal cylindrical container, and further, a flat ring 9 is overlapped thereon and fastened to the fixed boss 13a. 2 is configured.
[0006]
Therefore, the inside of the plastic pressure container 1 is pressurized by injecting gas from the pressure coupler 6, and the pressed storage liquid is pumped to the outside through the pressure coupler 7.
[0007]
[Problems to be solved by the invention]
However, in the above-described conventional technology, the external screw portion 3b of the mouth portion 3 of the plastic pressure-feeding container 1 that easily moves or deforms when an external force is applied and the internal screw portion 5a of the presser hat 5 are screwed together. Positioning by pressing and deforming the O-ring 8a to a predetermined dimension is difficult, and there is a problem that the sealing performance is not stable.
[0008]
Further, the plastic pumping containers 1 through the hat flange 5a of the holding hat 5, has become a metal cylinder and the container or Raburasage was state, or deformed elongation mouth 3 by weight and the like of the stock solution, screw The joint portion 3B is loosened, and the pressure on the O-ring 8a is changed. As a result, there is a problem that the sealing performance is lowered and the life of the plastic container 1 is shortened.
[0009]
Therefore, according to the present invention, the O-ring of the mouth portion is pressed and deformed to a predetermined size so that it can withstand gas press-fitting, and at the same time, the load from the plastic pressure-feeding container side does not affect the sealing performance. It is an object of the present invention to provide a mouth seal structure for a plastic pumping container.
[0010]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention described in claim 1 is capable of being attached and detached into a metal cylindrical container in which a bottom plate is provided and a cylindrical outer tube is formed upward from the bottom plate. In the mouth seal structure of a plastic pumping container that is inserted and pumped the stored storage liquid by gas injection, a lid flange is provided on the periphery of the lid that closes the mouth, and a bolt is provided facing the lid flange. through providing a fastening ring to be fastened together, as can be clamped by said lid flange and said fastening ring, Rutotomoni provided a mouth projecting flange rectangular cross section on the outer peripheral surface of the opening portion near the plastic pumping containers A substantially hat-shaped presser hat is detachably fastened to the metal cylindrical container so as to press the lid that closes the mouth portion toward the bottom plate .
[0011]
With the above configuration, the peripheral edge of the seal groove is brought into contact with the mouth flange and fastened, so that the O-ring and the extending portion are pressed to a predetermined dimension.
Furthermore, by setting it as the said structure, it can prevent that a cover body deform | transforms from an opening | mouth part by the internal pressure in which gas was injected.
[0012]
Further, the mouth seal structure can be configured without being separated and restrained from the metal cylindrical container.
[0013]
According to a second aspect of the present invention, in the mouth seal structure of the plastic pumping container according to the first aspect, a sealing groove is provided on the periphery of the inner surface of the lid body, leaving an outer peripheral surface, and inserted into the sealing groove. An extending portion that fits into the seal groove and abuts against the O-ring extends from the mouth portion of the plastic container body so that the ring can be pressed and deformed to a predetermined dimension, and the mouth extends from the outer peripheral surface. It is characterized by being provided so as to be in contact with the part flange.
[0014]
By setting it as the said structure, the press deformation of an O-ring becomes fixed and a sealing performance is stabilized.
[0015]
According to a third aspect of the present invention, in the mouth seal structure of the plastic pumping container according to the first or second aspect , the fastening ring includes a flat donut-shaped main body and a vertical wall along the outer peripheral surface of the main body. with you formed substantially L-shaped cross section provided, it is characterized in that by dividing the fastening ring at least two.
[0016]
By adopting the above configuration, it is easy to fit in the lower surface side of the mouth flange, and the vertical wall is held and assembled, so that productivity is good.
[0019]
Here, the fact that the O-ring can be pressed and deformed to a predetermined dimension means that the O-ring used for sealing is generally a rubber material, and the dimension to be pressed and deformed is a predetermined dimension corresponding to the size of the O-ring. If not, it means that if it is too large or too small, the repulsive force becomes inhomogeneous and the sealing performance is lowered.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show an embodiment of the mouth seal structure of a plastic pressure feeding container according to the present invention, FIG. 1 is an explanatory view of the plastic pressure feeding container according to the embodiment, and FIG. 2 shows the shape of the plastic container main body. FIG. 3 is an enlarged explanatory view of the mouth, which is part A of FIG. 2, and FIG. 4 is a mouth seal in which a lid is fitted to the mouth of the plastic container body according to the embodiment. It is sectional drawing which shows a structure.
[0021]
In FIG. 1, 21 is a plastic pressure container, 21A is a plastic container body, 22 is a mouth seal structure, and this mouth seal structure 22 is a mouth 23 and a lid 24 fitted to the mouth 23 and a fastening ring. 29.
[0022]
31 is a metal cylindrical container, 32 is an upper part of the outer cylinder, and an upper plate 33 is provided along the plastic container main body 21A. A plurality of fixed bosses 33a are provided on the upper plate 33, and the fixed bosses 33a are provided with bolts. The presser hat 30 is fastened. Reference numeral 34 denotes an outer cylinder middle portion that surrounds the body portion 212 of the plastic container main body 21A.
[0023]
Reference numeral 36 denotes an outer cylinder lower portion, which is provided with a bottom plate 37 along the plastic container main body 21A. The outer cylinder lower portion 36 in which the bottom plate 37 and the outer cylinder are integrally formed is formed by a lower end portion of the outer cylinder middle portion 34 and an assembly screw 38. It is assembled so that it can be removed.
[0024]
The lid body 24 is provided with press-fitting and pressure-feeding couplers 26 and 27 on the outer surface side. A gas is press-fitted from the pressure-fitting coupler 26 to increase the pressure inside the plastic pressure-feeding container 21, and the stored storage liquid 41 is stored. Is configured to be pumped to the outside through the pumping pipe 27a and the pumping coupler 27.
[0025]
2 and 3 show details of the plastic container main body and the mouth portion. The upper and lower surfaces of the body portion 212 of the plastic container main body 21A are provided with an upper surface portion 211 and a lower surface portion 213 in a curved shape. A mouth portion 23 that protrudes upward from the center portion is projected.
[0026]
A mouth flange 23b projecting in a rectangular cross section is provided on the outer peripheral surface in the vicinity of the end of the mouth 23 in the mouth 23 protruding from the plastic container main body 21A. Moreover, the end part of the opening part 23 is extended and the extension part 23a is provided.
[0027]
FIG. 4 is a cross-sectional view showing the mouth seal structure.
[0028]
That is, the lid body 24 is mounted so as to close the mouth portion 23, and the extending portion 23a provided in the mouth portion 23 is fitted into the seal groove 28 of the lid body 24 into which the O-ring 28a is inserted. An outer peripheral surface 24c is provided on the peripheral edge of the seal groove 28, and the outer peripheral surface 24c is in contact with the mouth flange 23b when the lid body 24 is mounted.
[0029]
A split fastening ring 29 is mounted on the lower side of the mouth flange 23b so as to sandwich the mouth flange 23b, and is provided in the fastening ring 29 through a through hole 24b provided in the lid flange 24a. The fastening screw 29a is fastened via a bolt 29b.
[0030]
Further, the presser hat 30 is fastened from a plurality of fixed bosses 33a provided on the upper plate 33 of the metal cylindrical container 31 so that the upper surface side of the lid 24 is pressed (see FIG. 1).
[0031]
In addition, an opening is provided in the central portion of the presser hat 30 so as to avoid interference when the press-fitting and pressure-feeding couplers 26 and 27 are attached to the lid 24.
[0032]
Further, from the pressure feeding coupler 27, a pressure feeding pipe 27a is extended to the lower surface portion of the plastic container main body 21A so that the storage liquid 41 has a minimum remaining amount.
[0033]
The effect | action of the opening part sealing structure of the plastic pressure feeding container which consists of the above structure is demonstrated mainly based on FIG.1 and FIG.4.
[0034]
As shown in FIG. 1, the plastic container main body 21A is attached to the metal cylindrical container 31 by removing the screw 38 attaching the outer cylinder lower part 36 to the outer cylinder middle part 34 and then removing it from the mouth of the plastic container main body 21A. The part 23 is inserted toward the opening of the upper plate 33 of the metal cylindrical container 31, and the outer cylinder lower part 36 is assembled to the outer cylinder middle part 34 again.
[0035]
Subsequently, the lid body 24 is fitted into the mouth portion 23 of the plastic container main body 21A, and the outer peripheral surface 24c of the lid body 24 is brought into contact with the mouth flange 23b. A fastening ring 29 is provided below the mouth flange 23b. It attaches and fastens it via the bolt 29b so that the opening | mouth part flange 23b may be clamped from the upper and lower sides.
[0036]
Accordingly, the O-ring 28a and the extending portion 23a inserted into the seal groove 28 are inserted until the mouth flange 23b and the outer peripheral surface 24c of the seal groove 28 are in contact with each other, and are thus pressed and deformed to a predetermined dimension. Will be in an appropriate seal state.
[0037]
Subsequently, the presser hat 30 is fastened to a plurality of fixed bosses 33 a provided on the upper plate 33 of the metal cylindrical container 31, and attached so as to hold the lid 24.
[0038]
Further, the pressure-feeding coupler 27 and the pressure-feeding coupler 27 and the pressure-feeding pipe 27a connected from the outer surface side of the lid body 24 so as to reach the substantially lower surface portion 213 of the plastic container main body 21A are screwed and fastened to the lid body 24, respectively. Complete installation of assembly port seal structure.
[0039]
When the storage liquid 41 stored in the plastic container body 21A is pressurized with gas from the press-fitting coupler 26 and the pressure inside the plastic container body 21A is increased as indicated by a chain line arrow, the storage liquid 41 is The pressure-feeding pipe 27 a is lifted and fed through the pressure-feeding coupler 27.
[0040]
At this time, the mouth seal structure 22 is also pressurized by the pressurization by gas press-fitting, so that the plate thickness of the lid 24 is increased and the rigidity is increased, as shown in FIG. By fastening and pressing to the fixed boss 33a, the sealing performance can be maintained without being deformed against the pressure increase, and thus the mouth seal structure 22 is not deformed.
[0041]
In addition, when making the plate | board thickness of the cover body 24 thin, you may make it aim at a rigid improvement by reinforcing a rib.
[0042]
Further, when the plastic container body 21A is used for several times and it is time to replace it, the presser hat 30 which is the mouth seal structure 22 is first removed from the fixed boss 33a, and the bolt 29b is removed. Remove the fastening ring 29 and the lid 24. And the assembly | attachment screw 38 of the metal cylindrical container 31 is removed, and the outer cylinder lower part 36 is removed.
[0043]
In this state, the plastic container main body 21A is exchanged by pulling out the plastic container main body 21A from the upper and middle portions 32, 34 of the outer cylinder, inserting the replacement plastic container main body 21A, and assembling the lower outer cylinder 36.
[0044]
Here, the metal cylindrical container 31 is generally manufactured from stainless steel with less rust generation.
[0045]
Here, the plastic container main body 21A is generally formed by blow molding using an ultra-high molecular weight polyethylene resin material. In addition, when a container capacity | capacitance is large, it shape | molds by a rotational molding method.
[0046]
【The invention's effect】
As described above, the invention described in claim 1 has a seal structure with only a mouth portion that is not restrained by being fastened with the metal cylindrical container.
[0047]
Accordingly, the weight of the storage liquid is received by the plastic pressure container in contact with the inner surface of the metal cylindrical container, and partial elongation deformation of the mouth portion and the like can be avoided, and the life of the plastic pressure container is reduced. Extend.
[0048]
Further, since the metal cylindrical container is not restrained, the mouth seal structure provided in the plastic container main body is stable without being deteriorated in sealing performance by an external force.
Furthermore, since the internal pressure is applied to the plastic pressure-feeding container and the lid body is fixed with a presser hat, the mouth seal structure is not damaged or the sealing performance is not deteriorated.
[0049]
According to the second aspect of the invention, the outer peripheral surface of the lid body is in contact with the lid body only by assembling the mouth portion so as to close the mouth portion, and the amount of insertion of the extending portion into the seal groove can be regulated.
[0050]
Therefore, the O-ring can always be pressed and deformed to a predetermined dimension, and the sealing performance is stable.
[0051]
In the invention described in claim 3, the fastening ring is divided and has a vertical wall.
[0052]
Therefore, after the lid is fitted to the mouth, it is easy to mount from the lower side, the workability is good, and the number of assembling steps can be reduced.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a partial cross section of a plastic pumping container according to an embodiment of the present invention.
FIG. 2 is an external view showing a partial cross section of the plastic container body according to the embodiment.
FIG. 3 is an enlarged explanatory view of a part A in FIG. 2;
FIG. 4 is a cross-sectional view showing a mouth seal structure in which a lid is fitted to the mouth of the plastic container main body according to the embodiment.
FIG. 5 is a cross-sectional view showing a mouth seal structure in which a lid is fitted to the mouth of a plastic container according to a conventional example.
[Explanation of symbols]
21A ... plastic container body 22 ... mouth seal structure 23 ... mouth 23b ... mouth flange 24 ... lid 24a ... lid flange 29 ... fastening ring 29b ... bolt

Claims (3)

A plastic pressure-feeding container in which a bottom plate is provided and a cylindrical outer cylinder is inserted into a metal cylindrical container formed upward from the bottom plate so as to be attached and removable, and the stored storage liquid is pumped by gas injection. In the mouth seal structure, a lid flange is provided on a peripheral edge of the lid that closes the mouth, a fastening ring that is opposed to the lid flange and fastened to each other via a bolt is provided, the fastening ring and the lid flange, as can be clamped by, Rutotomoni provided a mouth projecting flange rectangular cross section on the outer peripheral surface of the opening portion near the
A plastic pressure-feeding container, wherein a substantially hat-shaped presser hat is detachably fastened to the metal cylindrical container so as to press the lid that closes the mouth of the plastic pressure-feeding container toward the bottom plate. Mouth seal structure.   A seal groove is provided leaving an outer peripheral surface at the periphery of the inner surface of the lid, and the O-ring inserted into the seal groove is fitted into the seal groove and extends in contact with the O-ring so as to be deformed to a predetermined size. 2. The mouth part of the plastic pumping container according to claim 1, wherein a part is provided so as to extend from the mouth part of the plastic container body and to be in contact with the mouth flange from the outer peripheral surface. Seal structure. Characterized in that the fastening ring, which together with you formed substantially L-shaped cross section provided with a vertical wall along the outer circumferential surface of the flat donut-shaped body and the body was dividing the fastening ring at least two The mouth seal structure for a plastic pressure-feed container according to claim 1 or 2 .

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