JP2003312787A - Beverage container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a beverage container which can simply and surely seal a gap between a mouthpiece and a bush without high sizing accuracy required against both the outside and the inside to keep hygienic and to well keep quality of a beverage. <P>SOLUTION: When the bush 17 of a fitting 3 is to be screwed with the mouthpiece 14 of a beverage container body 1, while sealing between the inner periphery of the base of the mouthpiece 14 and the outer periphery of an intermediate part of the bush 17 is assured by a first sealing member 22, a gap between the mouthpiece 14 and the periphery of the tip of the bush 17 is kept sealed by a second sealing member 47. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beverage container such as a draft beer barrel, which is used for filling and cooling or heating a desired beverage such as draft beer or draft sake and pouring.

[0002]

2. Description of the Related Art Conventionally, as an example of a draft beer barrel for business use, a bush of a well-type fitting is detachably screwed inside the mouthpiece of the body of the draft beer barrel, and the inner circumference of the base of the mouthpiece and the outer circumference of the middle portion of the bush are connected to each other. There is known a configuration in which a packing for sealing is interposed between them in a compressed state.

In the draft beer barrel having the above-mentioned structure, the female thread of the mouthpiece and the male thread of the bush are open to the outside, so that rainwater, fine dust, etc. are exposed from the opening to the female thread of the mouthpiece and the bush. Enter the gap with the male screw. The rainwater, dust, etc. that have entered are prevented from entering the draft beer barrel main body, that is, draft beer, by the packing interposed between the inner circumference of the base of the mouthpiece and the outer circumference of the intermediate portion of the bush. However, if rainwater, dust, etc. are left in a state where they are left in the gap between the female screw of the mouthpiece and the male screw of the bush, it is not only unhygienic due to the generation of bacteria, but also loose packing, In the case of damage, rainwater, dust and the like may enter the draft beer barrel body and contaminate draft beer.

Conventionally, in order to solve the above problems,
As described in Japanese Patent Laid-Open No. 2000-79991, a brim-like portion is provided on the outer periphery of the tip end portion of the bush, and a packing for sealing is interposed in a compressed state between the inner surface of the brim-like portion and the tip end surface of the die. In addition, there has been proposed a beverage container configured to prevent rainwater, dust and the like from entering the gap between the female screw of the mouthpiece and the male screw of the bush.

[0005]

However, in the structure of the conventional example as described above, the size of the second packing interposed between the tip surface of the die and the collar portion of the bush is small, and the compression allowance is small. Because of the small amount, the first packing interposed between the inner circumference of the base of the mouthpiece and the outer circumference of the intermediate portion of the bush compresses the second packing before guaranteeing the sealed state, that is, before the sealed state is achieved. There is a risk that the bush will be screwed onto the mouthpiece in this state. In this state, when the draft beer barrel is transported, the draft beer filled in the draft beer barrel body may enter the gap between the female screw of the mouthpiece and the male screw of the bush from a minute gap between the mouthpiece, the bush and the first packing. is there. The amount of draft beer that has entered this gap is small, and there is a risk of deterioration due to contact with the air remaining in the gap,
If this deteriorated beer enters the draft beer barrel main body through the gap between the base, the bush and the first packing, the quality of the draft beer in the draft beer barrel main body may be deteriorated.

On the other hand, in order to surely seal the mouthpiece and the bush both inside and outside by the first and second packings, high dimensional accuracy is required for the mouthpiece, the bush and the first and second packings. This will increase the cost.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide high dimensional accuracy not only for the gap between the mouthpiece and the bush but also for the inside. It can be easily and reliably sealed without being required, and prevents rainwater, dust, etc. from the outside and drinks from the inside, and prevents these from mixing into the drink inside. Therefore, the present invention is intended to provide a beverage container that can be retained hygienically, that is, that the quality of the beverage can be favorably retained, and that the cost can be reduced. .

[0008]

In order to solve the above problems, a beverage container according to the present invention comprises a beverage container body having a base,
A fitting removably screwed to the inside of the base by a bush, a first sealing member interposed between the inner circumference of the base of the base and the outer circumference of the middle of the bush, and the base and the bush. A second seal member interposed between the peripheries of the distal end portions, wherein the first seal member ensures the seal retention between the inner periphery of the base of the mouthpiece and the outer periphery of the intermediate portion of the bush. The second seal member is configured to maintain a seal between the mouthpiece and the periphery of the tip of the bush.

In the above structure, the second seal member is integrally held on the outer periphery of the tip portion of the bush, and is formed on the inner periphery of the tip portion of the die when the bush is screwed inside the die. The second seal member is integrally held on the inner circumference of the tip portion of the mouthpiece so that it can slide in a pressure contact state with the seal surface, and the bush is screwed inside the mouthpiece. It can be configured so that it can slide in a pressure contact state with a sealing surface formed on the outer periphery of the tip portion of the bush.

Further, the bush is screwed to the inner side of the die, and the first seal member holds a seal between the inner periphery of the base of the die and the outer periphery of the intermediate portion of the bush. The second seal member is configured to be press-fitted between the engaging recess formed on the outer periphery of the tip of the bush and the periphery of the inner tip of the base so as to maintain the sealing state, or the bush is connected to the base. After being screwed to the inside of the base to hold a seal between the inner periphery of the base of the base and the outer periphery of the intermediate portion of the bush by the first seal member,
The second seal member is configured to be press-fitted between the collar-shaped portion formed on the outer periphery of the tip end portion of the bush and the tip end portion of the mouthpiece to maintain the seal state, or the bushing of the mouthpiece After being screwed to the inside and the first seal member holds a seal between the inner circumference of the base of the mouthpiece and the outer circumference of the middle portion of the bush, the second seal member is attached to the mouthpiece and the bush. It can be configured to press-fit into the groove around the tip portion from above and hold it in a sealed state.

According to the present invention configured as described above,
While the first seal member ensures the seal retention between the inner circumference of the base of the mouthpiece and the outer circumference of the middle portion of the bush, the second seal member maintains a sealed state between the mouthpiece and the periphery of the tip of the bush. Therefore, it is possible to easily and surely seal the gap between the cap and the bush not only to the outside but also to the inside without requiring high dimensional accuracy, and to prevent rainwater and dust from the outside. It is possible to prevent such substances from getting into the inside beverage and from entering the beverage from the inside.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. 1 is a partially cutaway front view showing a beverage container according to a first embodiment of the present invention, FIG. 2 is a partially enlarged cross-sectional view showing the beverage container, and FIG. 3 is an enlarged cross-sectional view showing an essential part of the beverage container. is there.

As shown in FIGS. 1 and 2, a beverage container 1 according to the present embodiment is attached to a beverage container body 2 and a mouth portion of the beverage container body 2, and supplies the beverage to the beverage container body 2. And a well type fitting 3 that can be discharged. In the present embodiment, an example in which the beverage container 1 is applied to a draft beer barrel will be described.

An example of the draft beer barrel main body 2 will be described. In particular, as is clear from FIG. 1, a body 11 made of metal such as stainless steel, an upper mirror 12 and a lower mirror 13 are integrally provided, and At the edge of the hole formed at the center of the mirror 12, a cylindrical base 14 made of metal, for example, stainless steel, is provided.
The bases of are joined together. A lower skirt portion 15 made of hard rubber or the like is integrally provided on the outer circumference of the lower mirror 13, and an upper skirt portion 16 made of hard rubber or the like is integrally provided on the outer circumference of the upper mirror 12. Holes for draining (not shown) in the lower skirt portion 15 and the upper skirt portion 16
Are respectively formed at one location or at a plurality of locations.

An example of the fitting 3 will be described. Particularly, as apparent from FIGS. 2 and 3, the base 1
4 and the upper part of the draft beer barrel main body 2, a bush 17 is inserted, and a female screw 18 is formed on the inner circumference of the middle portion of the base 14.
A male screw 19 formed on the outer periphery of the bush 17 at a position slightly inward of the tip portion of the bush 17 is removably screwed. An annular protrusion 20 formed on the inner circumference of the base of the base 14.
And an annular step portion 2 formed on the outer periphery of the intermediate portion of the bush 17
A seal ring 22 having a quadrangular cross section, which is a first seal member, is interposed between the first seal member 1 and the seal member 1 in a compressed state for sealing.

An annular engaging groove 46 is formed as an engaging means on the outer periphery of the tip portion of the bush 17, and the engaging groove 46 has a second groove.
The inner peripheral portion of the O-ring 47, which is a seal member of the above, is engaged and the O-ring 47 is integrally held on the outer periphery of the tip portion of the bush 17. The outer circumference of the O-ring 47 is the base 14
It is pressed against a sealing surface 48 formed on the inner circumference of the tip end portion of the base so that the annular outer opening of the mouthpiece 14 and the bush 17 is sealed. And the male screw 19 of the bush 17
Is removably screwed to the female screw 18 of the base 14, and a seal ring 22 is interposed in a compressed state between an annular protrusion 20 on the inner periphery of the base of the base 14 and an annular step 21 on the outer periphery of the intermediate portion of the bush 17. The O-ring 47 is configured so as to be able to slide on the sealing surface 48 of the mouthpiece 14 in a compressed state when it is sealed. Along with this, the seal ring 22 which is the inner first seal member is reliably compressed between the annular projection 20 on the inner circumference of the base of the mouthpiece 14 and the annular step 21 on the outer circumference of the intermediate portion of the bush 17. The O-ring 47, which is the second outer sealing member, reliably seals the space between the mouthpiece 14 and the tip of the bush 17, that is, the annular outer opening, while ensuring a reliable seal retention. It

The upper part of the down tube 23 is inserted into the bush 17, and the down tube 23 is provided such that the lower end thereof reaches the vicinity of the bottom part of the draft beer barrel body 2 and is movable in the axial direction. The down tube 23 has a collar-shaped portion 24 at the upper end thereof, and the lower portion of the first valve body 25 whose outer peripheral portion is made of rubber is fixed to the inside of the upper end portion by press fitting or the like. A step portion 26 on the outer periphery of the intermediate portion is in contact with the upper surface of the collar portion 24.

The stopper 27 is made of a leaf spring material, and the base ring-shaped portion 28 is fitted to the upper end of the down tube 23 in contact with the lower surface of the collar-shaped portion 24. Retaining portions 29 are formed at a plurality of locations inside the lower end of the bush 17, and retainers 30 are engaged with the receiving portions 29 on the outer periphery of the down tube 23. The inside of the bush 17 and the inside of the draft beer barrel body 2 are communicated with each other by an open portion 31 at the lower end of the bush 17, an elongated hole 33 formed in the skirt portion 32 of the bush 17, and the like. The elongated holes 33 are formed at a plurality of locations on the circumference and in two steps along the axial direction.

A compression spring 34 is interposed between the ring-shaped portion 28 of the stopper 27 and the retainer 30 on the outer periphery of the down tube 23, and the elasticity of the compression spring 34 causes the stopper 27, the down tube 23 and the first valve body. 25
Are integrally urged upward. As a result, the outer peripheral portion of the upper portion of the first valve body 25 is brought into contact with the valve seat 35 provided inside the bush 17, the first flow passage 36 is closed, and the first stopper portion 37 and the first stopper portion 37 of the stopper 27 are closed. A second stopper portion 38 is projected outward from a hole 39 formed in the skirt portion 32 of the bush 17. When cleaning and repairing the draft beer barrel main body 2 and the fitting 3, when the first valve body 25, the down tube 23, the stopper 27, etc. are lowered against the elasticity of the compression spring 34 to degas, the stopper portion is used. 37 and 38 are put into the bush 17 by abutting against the lower edge of the hole 39, and can be removed from the mouthpiece 14 in this state. Even if the fitting 3 is to be removed from the mouthpiece 14 in the state where the gas is not released as described above. Stopper part 3
It is set so that 7 comes into contact with the lower surface of the mouthpiece 14 and is in a retaining state (locked state).

A second valve body 40 is provided inside the upper portion of the down tube 23 so as to be movable in the axial direction. A compression spring 42 is interposed between the second valve body 40 and a step portion 41 formed on the inner circumference of the down tube 23 below the second valve body 40. Due to the elasticity of the compression spring 42, the second valve body 40 is elastic.
Is urged upward. Thereby, the second valve body 40
Is brought into contact with the valve seat 43 of the first valve body 25, and the second flow path 44 is closed. Bush 17
Engaging claws 45 capable of engaging with a jig (not shown) for rotational operation are formed at two positions inside the upper end (outer end) of the same with 180 ° phase shift.

The fitting 3 is a seal ring 2
2. Except for the O-ring 47 and the outer peripheral portion of the first valve body 25, the first valve body 25 is made of metal, for example, stainless steel.

In order to fill the draft beer barrel 1 with draft beer, for example, the draft beer barrel 1 is turned upside down (not shown in FIG. 2) and the draft beer filling machine 50 is used. The packing 52 around the lower end of the outer cylinder 51 is superposed on the tip surface of the base 14, and the clamp 53 is engaged with the collar portion 54 of the base 14 to link the draft beer filling machine 50 to the draft beer barrel 1. Then, the filling probe 55 presses the first valve body 25 in a sealed state by interposing the packing 56, and at the same time, the second valve body 40 is pressed.
Press. Along with this, the first valve body 25, the down tube 23, and the like are moved toward the bottom side against the elasticity of the compression spring 34, so that the first valve body 25 is separated from the valve seat 35, and the first valve body 25 is separated. The flow path 36 is opened, and the second valve body 4 is opened.
It is possible to move 0 toward the bottom side against the elasticity of the compression spring 42, separate the second valve body 40 from the valve seat 43, and open the second flow path 44. Then, draft beer from a draft beer supply source (not shown) is passed through the flow passage 57 between the outer cylinder 51 and the filling probe 55, the first flow passage 36, and the inside of the skirt portion 32 of the bush 17 to prepare the draft beer barrel main body 2.
By supplying the gas to the inside of the draft beer barrel body 2 and discharging the gas from the draft beer barrel body 2 through the down tube 23, the second flow path 44, the hole 58 at the tip of the filling probe 55, and the flow path 59 in the filling probe 55, draft beer Can be filled in the draft beer barrel main body 2. At the time of this filling, the mouthpiece 1 which is a portion where the packing 52 of the draft beer filling machine 50 is overlapped as described above.
Since the tip end surface of No. 4 is flat and is open without any obstacles, the conventional draft beer filling machine 50 can be used as it is. It should be noted that the draft beer barrel 1 can be filled with draft beer by the draft beer filling machine even in a normal orientation in which the draft beer barrel 1 is not inverted.

A dispense head (not shown) is used to discharge the draft beer in the draft beer barrel 1 for pouring into a desired container such as a glass. That is, the lower part of the dispensing head is inserted into the bush 17 and the inside of the first valve body 25, the tops of the first valve body 25 and the second valve body 40 are pressed, and the fitting 3 is made elastic by the compression spring 34. The second valve body 40 is lowered against the elasticity of the compression spring 42, and the second flow passage 44 is opened while the first flow passage 36 is opened against the elasticity of the compression spring 42. In this state, carbon dioxide gas is supplied from the carbon dioxide gas supply source from the first flow path 36 through the flow path of the dispensing head into the draft beer barrel body 2, and the draft beer in the draft beer barrel body 2 is pressurized to bring down the draft beer. It can be discharged through the tube 23, the second flow path 44, and the flow path of the dispensing head and poured into a desired container.

According to the present embodiment, as described above, the seal ring 22 as the first sealing member ensures the seal retention between the inner periphery of the base of the mouthpiece 14 and the outer periphery of the intermediate portion of the bush 17, An O-ring 47, which is a second seal member capable of sliding the sealing surface 48 of the mouthpiece 14 in a pressure contact state, keeps the space between the mouthpiece 14 and the periphery of the bush 17, that is, the annular outer open portion in a sealed state. Therefore, the clearance between the mouthpiece 14 and the bush 17 can be easily and surely sealed not only for the outside but also for the inside without requiring high dimensional accuracy, and the rainwater can be leaked from the outside. It is possible to prevent dust, dirt, etc., and draft beer from the inside from mixing in the draft beer inside, and it is possible to keep it hygienically and at the same time, draft beer products It is possible to prevent the deterioration, moreover, it is possible to reduce the cost. Further, according to the present embodiment, the outer shape of the base 14 can be changed or the base 1
4 does not require a portion projecting from the tip end surface, the conventional draft beer filling machine 50 can be used as it is without changing the design, and the economical efficiency can be improved.

Next, a second embodiment of the present invention will be described. FIG. 4 is an enlarged sectional view of an essential part showing a beverage container according to the second embodiment of the present invention.

In the present embodiment, the illustration and description of the same configuration as the first embodiment will be omitted, and a configuration different from that of the first embodiment will be mainly described.

As shown in FIG. 4, in this embodiment, an annular engaging groove 60 is formed as an engaging means on the inner circumference of the tip portion of the mouthpiece 14, and the engaging groove 60 serves as a second seal member. The inner peripheral portion of the O-ring 61 is engaged so that the O-ring 61
Are integrally held on the inner circumference of the tip portion of the base 14. O
The inner peripheral side of the ring 61 is pressed against a sealing surface 62 formed on the outer periphery of the tip portion of the bush 17, and the ring-shaped outer open portion of the base 14 and the bush 17 is sealed. Then, similarly to the first embodiment, the male screw 19 of the bush 17 is detachably screwed to the female screw 18 of the mouthpiece 14, and the annular protrusion 20 on the inner circumference of the base of the mouthpiece 14 and the outer circumference of the intermediate portion of the bush 17 are attached. When the seal ring 22 is interposed between the annular step portion 21 and the annular step portion 21 and is sealed,
The O-ring 61 is configured to slide on the sealing surface 62 of the bush 17 in a compressed state. Along with this, the seal ring 22 that is the inner first seal member is
With the second seal member on the outer side, in a state where the seal is surely compressed between the annular projecting portion 20 on the inner circumference of the base portion and the annular step portion 21 on the outer circumference of the intermediate portion of the bush 17, to ensure the reliable seal retention. A certain O-ring 61 reliably seals between the mouthpiece 14 and the periphery of the tip of the bush 17, that is, the annular outer opening.

Also in this embodiment, the same advantages as those of the first embodiment can be obtained.

Next, a third embodiment of the present invention will be described. FIG. 5: is a principal part expanded sectional view which shows the drink container which concerns on the 3rd Embodiment of this invention.

In the present embodiment, the illustration and description of the same configuration as the first embodiment will be omitted, and a configuration different from the first embodiment will be mainly described.

As shown in FIG. 5, in this embodiment, an annular engagement groove 63 is formed on the outer periphery of the tip portion of the bush 17. The engagement groove 63 is formed so as to gradually widen from the bottom to the open side on the side.
An O-ring 64, which is a second seal member, is engaged with the bottom of the engagement groove 63. The outer peripheral side of the O-ring 64 is brought into pressure contact with the inclined surface 65 of the inner periphery of the tip portion of the mouthpiece 14, and the annular outer open portion of the mouthpiece 14 and the bush 17 is sealed. Then, as in the first embodiment, the male screw 19 of the bush 17 is replaced with the female screw 18 of the base 14.
After being removably screwed, the seal ring 22 is compressed and interposed between the annular projecting portion 20 on the inner periphery of the base of the mouthpiece 14 and the annular step portion 21 on the outer periphery of the intermediate portion of the bush 17, and thereafter, The O-ring 64 is press-fitted between the engaging concave portion 63 of the bush 17 and the inclined surface 65 of the inner periphery of the tip end portion of the mouthpiece 14 by utilizing its elastic deformation, and is interposed in a compressed state between both to seal. ing. Along with this, the seal ring 22 that is the inner first seal member is
With the second seal member on the outer side, in a state where the seal is surely compressed between the annular projecting portion 20 on the inner circumference of the base portion and the annular step portion 21 on the outer circumference of the intermediate portion of the bush 17, to ensure the reliable seal retention. A certain O-ring 64 surely seals the outer opening of the base 14 and the bush 17.

Also in this embodiment, after the bush 17 is screwed onto the mouthpiece 14 to securely seal the inner seal ring 22, the space between the mouthpiece 14 and the tip of the bush 17, that is, the outer ring shape is formed. Since the open portion is sealed by the forced press-fitting of the O-ring 64, as in the first and second embodiments, the gap between the mouthpiece 14 and the bush 17 is not limited to the outside but also to the inside. Even if it is not required to have high dimensional accuracy, it can be easily and surely sealed, and rainwater, dust, etc. enter from the outside, draft beer enters from the inside, and these mix into the draft beer inside. Can be prevented and can be maintained hygienically, deterioration of the quality of draft beer can be prevented, and the cost can be reduced. Further, according to the present embodiment, in addition to the above advantages, it is not necessary to change the shape of the mouthpiece 14 and only the shape of the bush 17 needs to be changed, so that the draft beer barrel 1 already used can be relatively inexpensively manufactured. Can be refurbished.

Next, a fourth embodiment of the present invention will be described. FIG. 6 is an enlarged sectional view of an essential part showing a beverage container according to the fourth embodiment of the present invention.

In the present embodiment, the illustration and description of the same configuration as the first embodiment will be omitted, and mainly the configuration different from the first embodiment will be described.

As shown in FIG. 6, in this embodiment, the bush 17 is integrally provided with a collar portion 66 on the outer periphery of the tip portion, and the collar portion 66 is on the inner peripheral portion of the tip surface of the die 14. A seal that is set so as to be slightly spaced apart, and that is inclined relatively relatively gradually toward the base side from the outer peripheral side to the inner peripheral side on the surface facing the tip surface of the mouthpiece 14. It is set to have a surface 67. Then, similarly to the first embodiment, the base 1
The male screw 19 of the bush 17 is detachably screwed to the female screw 18 of No. 4, and the first screw is provided between the annular projecting portion 20 on the inner circumference of the base of the mouthpiece 14 and the annular step portion 21 on the outer circumference of the intermediate portion of the bush 17.
After the seal ring 22 which is the seal member of the above is interposed and sealed in a compressed state, the O ring 68 which is the second seal member is connected to the tip surface of the mouthpiece 14 and the seal surface 67 of the bush 17 by utilizing its elastic deformation. It is press-fitted between the two surfaces and is interposed between both surfaces in a compressed state so as to be sealed.

In the present embodiment, since there is an obstacle above the tip surface of the mouthpiece 14, the conventional draft beer filling machine cannot be used as it is and needs to be repaired. Also in the form, the same advantages as those of the third embodiment can be obtained, and the base 1
4 does not require the sealing surface 48 as in the first embodiment or the engaging groove 60 as in the second embodiment, and the mouthpiece 14 formed in the same manner as the conventional one can be used.

Next explained is the fifth embodiment of the invention. FIG. 7: is a principal part expanded sectional view which shows the drink container which concerns on the 5th Embodiment of this invention.

In the present embodiment, the illustration and description of the same configuration as the first embodiment will be omitted, and mainly the configuration different from the first embodiment will be described.

As shown in FIG. 7, in the present embodiment, a groove 70 is formed around the tip of the mouthpiece 14 and the bush 17 so as to extend between them, and this groove 70 has a cross section which is a second seal member. The rectangular seal ring 71 is configured to be press-fitted. Then, as in the first embodiment, the male screw 19 of the bush 17 is detachably screwed to the female screw 18 of the mouthpiece 14, and the annular protrusion 20 on the inner circumference of the base of the mouthpiece 14 and the outer circumference of the intermediate portion of the bush 17 are attached. The seal ring 22 which is the first seal member is provided between the seal ring 22 and the annular step portion 21.
After being sealed in a compressed state, the seal ring 71, which is the second seal member, is pressed into the groove 70 by utilizing its elastic deformation, and is interposed in a compressed state between both surfaces of the mouthpiece 14 and the bush 17. It is supposed to be sealed.

Also in this embodiment, the same advantages as those of the first embodiment can be obtained, and the upward projecting portion can be eliminated, and the upper opening portion of the mouthpiece 14 and the bush 17 can be removed. Since the seal ring 71 can close the seal almost completely, and there is no slight gap above the O-rings 47 and 61 as in the first and second embodiments, the sanitary retention is further improved. can do.

In the first and second embodiments, in order to integrally hold the O-rings 47 and 61 with the bush 17 and the base 14, any means other than the engaging grooves 46 and 60 may be used. it can. Further, the groove 70 in the fifth embodiment does not need to be formed so as to extend over the mouthpiece 14 side and the bush 17 side with a substantially equal depth.
Alternatively, it may be formed so as to be offset toward the bush 17 side. In addition, the present invention is not limited to the above embodiment, and various design changes can be made without departing from the basic technical idea thereof.

[0042]

As described above, according to the present invention, the second seal member is ensured by the first seal member while ensuring the seal retention between the inner periphery of the base of the die and the outer periphery of the intermediate portion of the bush. Since the space between the mouthpiece and the tip of the bush is kept in a sealed state by the, the gap between the mouthpiece and the bush is easily required without requiring high dimensional accuracy not only on the outside but also on the inside. Moreover, it can be reliably sealed, and it is possible to prevent rainwater, dust and the like from entering from the outside, and drinks from entering from the inside, and prevent these from being mixed into the drink inside. Therefore, it is possible to maintain the quality of the beverage in a hygienic manner, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a beverage container according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view showing the beverage container.

FIG. 3 is an enlarged sectional view of an essential part showing the beverage container.

FIG. 4 is an enlarged sectional view of an essential part showing a beverage container according to a second embodiment of the present invention.

FIG. 5 is an enlarged sectional view of an essential part showing a beverage container according to a third embodiment of the present invention.

FIG. 6 is an enlarged sectional view of an essential part showing a beverage container according to a fourth embodiment of the present invention.

FIG. 7 is an enlarged sectional view of an essential part showing a beverage container according to a fifth embodiment of the present invention.

[Explanation of symbols]

1 draft beer barrel (beverage container) 2 Draft beer barrel body (beverage container body) 3 fitting 14 mouthpiece 17 Bush 22 Seal ring (first seal member) 23 Down Tube 25 First valve body 27 Stopper 40 Second valve body 46 engagement groove 47 O-ring (second seal member) 48 Sealing surface 60 engagement groove 61 O-ring (second seal member) 62 Sealing surface 63 Engagement recess 64 O-ring (second seal member) 66 Collar 68 O-ring (second seal member) 70 groove 71 seal ring (second seal member)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tadahiro Ogawa             Eggplant, 2-24 Higashishinagawa, Shinagawa-ku, Tokyo             Inside Toa Corporation F term (reference) 3E082 AA04 BB03 CC01

Claims (6)

[Claims] 1. A beverage container body having a mouthpiece, a fitting removably screwed to the inside of the mouthpiece by a bush, and a fitting interposed between a base inner circumference of the mouthpiece and an intermediate outer circumference of the bush. A first seal member and a second seal member interposed between the base and the periphery of the tip of the bush are provided, and the inner periphery of the base of the base and the intermediate portion of the bush by the first seal member. A beverage container configured such that a seal is maintained between the outer periphery and the outer periphery, and a seal is maintained between the base and the periphery of the tip of the bush by the second seal member. 2. A second seal member is integrally held on the outer periphery of the tip portion of the bush, and when the bush is screwed inside the die, a sealing surface formed on the inner periphery of the tip portion of the die is pressure-welded. The beverage container according to claim 1, wherein the beverage container is configured to be slidable in a state. 3. A second seal member is integrally held on the inner circumference of the tip of the mouthpiece, and a sealing surface formed on the outer circumference of the tip of the bush when the bush is screwed inside the mouthpiece. The beverage container according to claim 1, wherein the beverage container is configured to slide under pressure. 4. The first bush is screwed to the inside of the base.
The sealing member between the inner periphery of the base portion of the mouthpiece and the outer periphery of the intermediate portion of the bush is kept in a sealed state.
2. The seal member according to claim 1 is configured to be press-fitted between an engaging concave portion formed on the outer periphery of the tip end portion of the bush and the periphery of the tip end portion on the inner side of the die to be maintained in a sealed state.
The beverage container described. 5. The first bush is screwed to the inside of the base.
The sealing member between the inner periphery of the base portion of the mouthpiece and the outer periphery of the intermediate portion of the bush is kept in a sealed state.
2. The beverage container according to claim 1, wherein the sealing member is press-fitted between a collar-shaped portion formed on the outer periphery of the tip end portion of the bush and the tip end portion of the mouthpiece, and is held in a sealed state. 6. The bush is screwed to the inner side of the base, and the first
The sealing member between the inner periphery of the base portion of the mouthpiece and the outer periphery of the intermediate portion of the bush is kept in a sealed state.
2. The beverage container according to claim 1, wherein the seal member is press-fitted into the groove around the tip of the mouthpiece and the bush from above and is held in a sealed state.