JP2003026266A - Liquid pour-out device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a liquid packaged in a flexible packaging bag from being oxidized or contaminated by microorganisms, dust or the like. SOLUTION: The liquid pour-out device includes a duct nozzle 7 having a tapered end 6 to be pierced through an unstretched film 4 for sealing a pour- out port 3 of the flexible packaging bag 1 and a check valve 8 having an inlet port 11 communicating with the nozzle 7, an outlet port 13 and a diaphragm 16 provided between both ports 11 and 13 for controlling the opening/closing of the inlet port 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to soy sauce and other seasonings, alcoholic beverages such as sake, wine and whiskey, edible oil, dressings and liquids that may contain various soft and hard particles or powders. Regarding a liquid pouring device suitable for use in a relatively large soft packaging bag for packaging a liquid such as soup or honey, in pouring a packaged object from the packaging bag a plurality of times, outside air into the packaging bag It effectively prevents the entry of air into the bag and the return flow of the object to be packaged that has once come into contact with the outside air into the bag.

[0002]

2. Description of the Related Art When a liquid to be packaged is poured out from a container a plurality of times, for example, outside air enters the container every time it is poured out, and by extension, the bag is wrapped in the outside air. As a conventional liquid pouring device for preventing oxidization of products, deterioration of flavor, and carry-in of microorganisms, dust, and the like into the bag, as disclosed in JP-A-8-133307, a bag is used. There is a check container equipped with a check valve at the spout.

As shown in FIG. 12 (a), a spherical valve body 114 is housed in a valve chamber 113 having an intake port 111 and a discharge port 112, and the valve chamber 113 has
Where the valve seat 115 that is in contact with the peripheral surface of the valve body 114 is provided, the upper part of the valve chamber 113 is made the expanded diameter part, while the lower part thereof is made the small diameter part that maintains a minute gap with the outer circumference of the valve body. The return port 112 causes the discharge port 112 to move.
A part of the liquid remaining inside is sucked into the valve chamber 113, and the liquid surface in the discharge port is retracted inward.

[0004]

However, in this conventional technique, the discharge of the liquid is completed and the spherical valve element 11 in the valve chamber is completed.
12 (b) when the check valve itself is returned to the posture in which the tip end faces upward in order to return 4 to FIG.
As illustrated in FIG. 3, in connection with the liquid level in the container, it is inevitable that the valve chamber 113 enters the container from the valve body 114 through the suction port side, or more specifically, through the suction port 111. Therefore, there is still a possibility that the liquid in the container may be oxidized by the outside air and the liquid in the container may be spoiled due to invasion of microorganisms and the like.

The present invention is intended to solve such problems of the prior art, and the purpose of the invention is to prevent accidental intrusion of outside air into the packaging bag, (EN) Provided is a liquid pouring device capable of sufficiently preventing the flow of a packaged item that has once come into contact with the outside air into the packaging bag and effectively preventing the packaged item in the bag from being oxidized and contaminated by microorganisms. It is in.

[0006]

The liquid pouring device of the present invention seals the pouring outlet of a flexible packaging bag, for example, a packaging bag having a thickness of about 50 to 150 μm and preferably made of a laminated film having an excellent gas barrier property. A reverse nozzle having a leading-out nozzle having a tapered end portion penetrating the unstretched film, an inlet port communicating with the leading-out nozzle, and an outlet port, and having a diaphragm disposed between the ports to control opening and closing of the inlet port. It is equipped with a stop valve.

Here, as the non-stretched film, polyolefin type 20 to 1 such as melocene-catalyzed polyethylene, linear rhodity polyethylene and polypropylene is used.
A single layer or laminated film having a thickness of about 50 μm can be used, and a nylon film or the like can also be used.

In using such an apparatus, the tapered end portion of the outlet nozzle is penetrated into an unstretched film provided directly or indirectly at the spout of the flexible packaging bag,
The tip opening of the nozzle is located in the bag, and based on the elastic restoring force of the non-stretched film, the non-stretched film is brought into close contact with the periphery of the nozzle so that a gap is completely formed between the nozzle and the spout. By removing it, it is possible to sufficiently prevent outside air and microorganisms from entering into the bag through the gap, which is particularly effective when both the tip portion of the nozzle and the surface of the non-stretched film are previously cleaned. Is.

In this way, after the device is attached to the spout of the flexible packaging bag, the flexible packaging bag or the case accommodating the flexible packaging bag is gripped and tilted to obtain a non-stretched film. With sufficient hold of the nozzle, the check valve diaphragm can be pushed away from the inlet port by the pressure or weight of the liquid in the bag. Therefore, thereafter, the liquid in the bag can be poured out through the outlet port as required under the communication of the inlet port and the outlet port of the check valve.

After the required amount of liquid has been poured out, the soft packaging bag is placed in the original standing posture, and the outlet port of the check valve is positioned at a higher level than the inlet port, so that the inside of the discharge passage continuing to the outlet port is closed. The weight of the residual liquid acts on the diaphragm, and the diaphragm closes the inlet port, and in the first place, the soft packaging bag is crushed and deformed by the corresponding amount due to the decrease in the internal volume of the bag corresponding to the amount of liquid poured out. However, since the diaphragm is made to adsorb around the inlet port by creating a decompressed atmosphere inside the packaging bag based on its inherent elastic restoring force, the outside air enters the packaging bag both when the liquid in the bag is poured out and when it is stopped. It does not enter and the liquid that comes into contact with the outside air does not return to the packaging bag.
Thus, here, the liquid in the flexible packaging bag is effectively protected from contact with outside air, microorganisms and the like.

When such a liquid in the bag is poured out, the flexible packaging bag itself has a high flexibility even though it has an elastic restoring force peculiar to the material, so that the liquid can be used without inhaling the outside air. It is crushed and deformed smoothly as much as the pouring amount of
The crushed shape is maintained as it is while the outside air is blocked by the diaphragm.

By the way, in such a device, when a bent discharge nozzle is connected to the outlet port of the check valve, falling bacteria, suspended dust and the like enter the check valve especially when the device is not in use. Can be effectively prevented.

Preferably, the leading edge of the tapered end portion of the outlet nozzle is a curved surface. According to this, when the outflow nozzle penetrates the unstretched film, the stretched amount of the unstretched film, and by extension, the shrinkage amount after the nozzle penetrates, the unstretched film has a nozzle peripheral surface. It is possible to improve the adhesion to. In other words, when the tip of the nozzle is sharply pointed, the nozzle penetrates into the film before the unstretched film is almost stretched, so that the elastic contractibility of the film cannot be effectively utilized.

Further, preferably, means for directly or indirectly fixing the outlet nozzle to the flexible packaging bag is provided. Here, the discharge nozzle, and thus the entire liquid pouring device,
As compared with the case where the unstretched film is held only by the holding force, the outlet nozzle has a fixing means composed of, for example, a screw member, a hooking member, an elastic member, or the like, and the flexible packaging bag itself or a storage case for the packaging bag. It is possible to more reliably prevent an unintended gap from being formed between the nozzle and the non-stretched film, and to more sufficiently prevent the nozzle from being withdrawn from the film.

By the way, when the diaphragm of the check valve is made of a material having excellent flexibility such as rubber or elastomer, the responsiveness of opening and closing the inlet port by the diaphragm can be enhanced. In addition, the diaphragm
In addition to the above, in addition to the above, the inlet port is closed when it is composed of a material that is excellent in gas barrier properties in addition to flexibility, preferably a rubber material and a synthetic resin, a metal material or a glass material. Gas permeation into the diaphragm can be effectively suppressed.

Also preferably, the check valve is provided at a position adjacent to the outlet port with an abutment rib for the diaphragm and a radial groove communicating with the outlet port from a radially outer side of the diaphragm. According to this, it is possible to reliably maintain the normally closed posture of the diaphragm, and to more reliably prevent entry of outside air into the bag when there is no pressure difference between the inlet and outlet ports. When the diaphragm opens the inlet port due to pressure increase on the inlet port side,
The closing of the outlet port by the diaphragm can be prevented by the abutment rib, and the liquid in the bag can be smoothly and reliably flowed from the inlet port to the outlet port via the radial groove.

As another structure of the check valve, an outlet port which also functions as a discharge port is defined at one position in the circumferential direction of the check valve, and the peripheral portion of the diaphragm is brought into contact with a substantially central portion of the diaphragm. It is also possible to provide a diaphragm restraining portion that is in contact with the entire circumference of the diaphragm.

In this structure, the radial groove can be omitted from the above description while the normally-closed function of the diaphragm is maintained, and the joy that liquid adheres and solidifies in the radial groove can be completely removed. You can Here, since the inlet port axis and the outlet port axis intersect each other in a vertical plane, the liquid in the packaging bag that has flowed from the inlet port to the outside of the diaphragm passes through the curved flow path to the outlet port. Will be reached. So here
It is possible to effectively prevent entry of falling bacteria, floating bacteria and the like into the diaphragm without a bent discharge nozzle.

By the way, in any of these check valves, it is preferable to provide a locking means for restraining the diaphragm at the closed position of the inlet port. According to this locking means, the inside of the flexible packaging bag due to the overturning or the like is caused. The unexpected outflow of liquid can be effectively prevented.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention, in which 1 denotes a soft packaging bag.

This soft packaging bag 1 shown here in a standing posture in which a liquid is packaged is, for example, nylon / polyethylene / linear low density polyethylene, polyester or nylon / dry laminate / aluminum vapor deposition or transparent vapor deposition polyester / linear low density polyethylene, A laminated film having a film structure such as polyester or nylon / dry laminate / aluminum foil / linear rhodesity polyethylene,
This soft packaging bag 1 is made by packaging into a packaging bag such as a four-sided sealing bag, a three-sided sealing bag, a gusset bag, and a stand pouch.
In addition to having high flexibility, it has a shape retention ability peculiar to the material, in other words, an elastic restoring force.

Here, such a flexible packaging bag 1 has a spout 2 formed by, for example, fusing a resin molded product and the spout 2 having a male screw portion on the periphery thereof, in the figure. The spout 3 shown with the cap removed is sealed with the non-stretched film 4 fused to the tip surface of the spout 2, for example.

On the other hand, the liquid pouring device 5 has a discharge nozzle 7 having a tapered end portion 6 which penetrates the non-stretched film 4,
In the drawing, a check valve 8 integrally connected to the upper portion of the outlet nozzle 7 and a bent discharge nozzle 9 integrally connected to the upper portion of the check valve 8 are provided.

Here, the tapered end portion 6 of the outlet nozzle 7
Has, for example, a conical shape, preferably a conical shape, and the tip edge thereof has a blunt curved surface.

Further, the check valve 8 communicates with the discharge nozzle 9 and a lower member 12 forming an inlet port 11 connected to the outlet nozzle 7, as shown in the enlarged vertical sectional view of FIG. In the space 15 defined by the upper member 14 forming the outlet port 13, a circular diaphragm 16 having excellent flexibility, more preferably excellent gas barrier property is arranged, and the outlet of the upper member 14 is disposed. Port 1
The diaphragm 1 protruding downward at a position adjacent to 3
The contact rib 17 that contacts the upper side member 1 is shown in FIG.
As shown in the bottom surface of FIG. 4, a plurality of radial grooves 18 are provided at intervals in the circumferential direction, and between the abutment ribs 17, the radial grooves 18 communicate with the outlet port 13 from the outside in the radial direction from the outer edge of the diaphragm 16. It is divided into.

The diaphragm 16 of the check valve 8 having the above-mentioned structure is shown in FIG. 2 (a) when the pressures acting on the inlet port 11 and the outlet port 13 are equal.
As shown, the diaphragm 16 that abuts the abutment rib 17
The lower member 1 at its peripheral portion under the inherent physical properties of
By making contact with 2 over the entire circumference thereof, the check valve 8 is caused to fully exhibit its normally closed function, and the flow of gas and liquid from the outlet port side to the inlet port side is reliably prevented.

When the pressure or force acting on the outlet port side becomes larger than that on the inlet port side, the diaphragm 16 is subjected to the entire displacement of the inlet port as shown in FIG. Because it sticks around 11,
In this state, the diaphragm 16 effectively blocks the return flow of the liquid once flowing out from the diaphragm 16 to the outlet port 13 side to the packaging bag 1 and the entry of the outside air into the packaging bag 1.

On the other hand, when the pressure or force acting on the diaphragm 16 from the inlet port 11 side exceeds that acting on the diaphragm 16 from the outlet port 13 side due to the tilting operation of the flexible packaging bag 1 or the like, As shown in FIG. 4, the diaphragm 16 contacts the abutment rib 17 over the entire circumference thereof to completely open the inlet port 11, so that the liquid in the bag flowing from the inlet port 11 into the space 15 is prevented from flowing into the diaphragm 16. Radial groove from around 1
It flows into the outlet port 13 via 8, and flows out from there through the bending discharge nozzle 9.

By the way, the diaphragm 16 of the check valve 8
The inlet port 11 should be flexible.
In order to enhance the responsiveness of opening and closing of, it is also preferable that in addition to this, it also has excellent gas barrier properties,
It is preferable for preventing oxidation and other alteration of the liquid in the bag. This means that the diaphragm 16 is
In a normal state as shown in FIG. 3, a contact with the area around the inlet port 11 over a certain area, for example, a silicone rubber having a thickness of about 0.3 to 2 mm, a rubber having excellent flexibility such as Viton (registered trademark of DuPont) or By using an elastomer, or as shown in FIG. 5, a gas barrier vapor deposition film 16b made of polyester, nylon, aluminum, glass or the like and having a thickness of, for example, about 7 to 20 μm is provided on the same elastomer substrate 16a. Alternatively, it can be realized by laminating any one of these films and foils.

Liquid pouring device 5 constructed as described above
1 is applied to the flexible packaging bag 1 shown in FIG. 1, in which the bottom of the packaging bag 1 filled with liquid is placed on the base plate 22 of the support frame 21, and a pour-out portion that becomes a resin molded product or the like is placed. 2 is supported by a fork claw 23 bifurcated around it, preferably by elastically engaging it, and is held in an upright position by holding its body with a band 24. In addition, this support frame 2
By gripping the support column 25 and tilting the packaging bag 1, it is possible to bring the packaging bag 1 into a desired tilted posture without accidental detachment of the packaging bag 1.

FIG. 6 shows another holding mode of the flexible packaging bag 1 to which the liquid dispensing device 5 can be applied, in which the dispensing part 2 provided in the packaging bag 1 is made of a relatively hard composite material. The unstretched film 4 is adhered to the top wall 27 of the case 26 made of a resin material while being screwed or fused to the top wall 27 at a position corresponding to the spout 3 of the spout 2. In this case, the spout 3 will be indirectly sealed by the unstretched film 4. Although the flexible packaging bag 1 is suspended from the case top wall 27 in the figure, it is also possible to support the packaging bag 1 by the bottom wall provided in the case 26 together with this. is there.

Application of the liquid pouring device 5 to such a flexible packaging bag 1 is performed by pushing the tapered end portion 6 of the outlet nozzle 7 into the unstretched film 4 as shown in FIG. 7 (a). Due to its curved leading edge, the unstretched film 4 is greatly stretched as shown in FIG. 7 (b) under its own physical properties, and the unstretched film 4 is further pushed into the unstretched film 4 as shown in FIG. 7 (c). As shown in FIG. 5, preferably, at the time of this break, the entire tip opening 7a of the nozzle 7 is positioned below the break film as shown in the figure.

According to this, as illustrated in FIG. 7 (d), a part of the front end opening 7a is located on the upper side of the fractured film when the unstretched film 4 is fractured.
It is possible to sufficiently eliminate the risk of outside air entering the spout 3.

After that, as shown in FIG. 7 (e), the outlet nozzle 7 is sufficiently pushed into the pouring portion 2, and the outlet nozzle 7, and thus the entire liquid pouring device 5, is unstretched. The film 4 is held on the basis of the elastic restoring force in the direction of decreasing the breaking hole diameter, and the entry of outside air, microorganisms, etc. into the inlet from between the outlet nozzle 7 and the unstretched broken film is prevented. The stretched film 4 is surely blocked under the close contact with the discharge nozzle 7.

Here, the elastic contraction force of the unstretched fractured film is considerably large, and even if the outlet nozzle 7 may be displaced relative to the pouring portion 2 in the radial direction to some extent, the nozzle 7 can be displaced.
There is no gap between the film and the film, and the nozzle 7 is not displaced in the axial direction, which means that the flexible packaging bag 1
The same applies to the case where the liquid in the bag is discharged from the liquid pouring device 5 by tilting, but for more sufficient holding of the pouring device 5, as shown in FIG. 7, the flange 7b provided on the tip 7 of the spout 2 is brought into contact with the tip of the spout 2 with the film 4 interposed therebetween.
Is preferably fixed to the pouring portion 2 with a screw cap 28.

Here, instead of the screw cap 28,
It is also possible to connect them using a rubber ring or other contraction ring, and for example, by elastically engaging an elastic piece projecting downward from the flange 7b with a screw thread of the spout 2 or the like. The connection can also be made.

When the pouring device 5 is mounted in this way and air or other gas remains on the upper part of the flexible packaging bag 1, the packaging bag 1 is pressed with fingers and the internal pressure of the bag is increased. Is higher than that of the outside air, the diaphragm 1
It is preferable to deform 6 to discharge the gas in the bag to the outside. After this discharge, the pressing force on the packaging bag 1 is removed, and the soft packaging bag 1 is restored to its original shape by the elastic restoring force specific to it. By generating a force to return,
The inner pressure of the bag can be made lower than that of the outside air so that the diaphragm 16 can be completely adhered to the periphery of the inlet port 11 as shown in FIG. It is possible to reliably prevent entry.

Here, the liquid in the bag is not checked by the liquid pressure or weight acting on the inlet port 11 by tilting the soft packaging bag 1 supported by the support frame 21 as illustrated in FIG. The diaphragm 16 of the valve 8
As shown in FIG. 4, the contact rib 17 is deformed and displaced into a position in which the contact rib 17 is almost entirely contacted with the contact rib 17, and under such a state, the liquid in the bag is discharged from the radial groove 18 opening around the diaphragm 16, It can be carried out by flowing down from the discharge port 29 through the outlet port 13 and the discharge nozzle 9. Since such pouring of the liquid in the bag is performed while the volume of the packaging bag 1 is reduced due to the decrease of the liquid in the bag, the reduced amount of the internal volume of the bag is compensated for by the invasion of outside air. This is unnecessary, and the contact of the liquid in the bag with the outside air and microorganisms is sufficiently prevented.

On the other hand, the stoppage of the liquid pouring is performed by the soft packaging bag 1
By returning to the standing posture, the action of the pressure or weight of the liquid in the bag on the diaphragm 16 is stopped, and at the same time, a negative pressure in the bag based on the elastic restoring force of the packaging bag 1 is applied to the diaphragm 16. , Diaphragm 16 in FIG.
As shown in FIG. 4, the pressure difference between the inside and the outside of the packaging bag 1 allows the bag to be completely adhered to the periphery of the inlet port 11. This also sufficiently prevents outside air, microorganisms, etc. from entering the packaging bag. Will be done.

By the way, when the flexible packaging bag 1 is returned to the upright position as described above, even if the liquid remaining in the discharge nozzle 9 may flow back onto the diaphragm 16, the liquid remains
Since the diaphragm 16 will function to assist the non-return action as described above and cannot return from the inlet port 11 into the packaging bag, the liquid in the bag is
The liquid that has once come into contact with the outside air can be surely blocked.

Further, as shown in FIGS. 1 and 2, when the bent discharge nozzle 9 is provided in communication with the outlet port 13, falling bacteria, floating bacteria, etc., in the standing posture of the packaging bag 1 are shown. It is possible to effectively prevent the check valve 8 from entering the check valve 8.

In the liquid pouring device as described above, in order to prevent an unexpected flow of the liquid in the packaging bag when, for example, the soft packaging bag 1 in the upright posture is accidentally laid down, the inside of the bag is prevented. When the liquid is not used, it is preferable to provide a locking means capable of restraining the diaphragm 16 of the check valve 8 in the completely closed posture of the inlet port 11.

FIG. 10 is a vertical sectional view illustrating this locking means. It penetrates from the top wall 9 a of the discharge nozzle 9 to the outlet port 13 and connects the diaphragm 16 to the inlet port 11.
The lock rod 31 is provided near the periphery of the lock rod 31. The lock rod 31 shown in FIG. 10 (a) has a spherical shape that is elastically deformable in the middle portion of the lock rod 31 to enable the click operation of the lock rod 31. In addition to providing the projection 31a, the nozzle top wall 9a is provided with a substantially spherical expansion portion 9b for receiving the spherical projection 31a of the rod 31 under the locked posture as shown in the drawing. In this locked posture, the diaphragm 16 can be forcibly brought into close contact with at least the periphery of the inlet port 11.

Further, in this lock mechanism, the knob 31b of the rod 31 is gripped, and the spherical projection 31a can be unlocked by elastically deforming the spherical projection 31a and pulling it out onto the top wall.

FIG. 10 (b) shows a similar spherical projection 31a provided on the rod 31 under elastic deformation of the same, preferably in combination with elastic deformation of the lower half of the expanded diameter portion 9b. The check valve 8 is locked by pushing it from the expanded diameter portion 9b to the outlet port side. And FIG. 10 (c)
In order to enable the lock rod 31 to be positioned and held at the lock position and the lock release position respectively, the discharge nozzle top wall 9a has two expanded diameter portions 9c similar to those described above.
9d is provided vertically adjacent to each other. According to this, when the spherical protrusion 31a is in the upper expanded portion 9c,
The lock is in the released normal state, and is in the locked state when it is in the lower expanded diameter portion 9d.

In any of these cases,
In order to make the click operation of the spherical protrusion 31a, and further the lock rod 31, smooth, a portion in the vicinity of the expanded diameter portion, particularly a constricted portion, is provided at intervals in the circumferential direction and is made of a soft material. At least one of the above is preferable, and FIG. 10 (c) shows a case where the adjacent portions including the expanded diameter portions 9c and 9d are made of a soft material.
According to this, the constricted portion can be easily deformed when the spherical protrusion 31a is displaced.

Although not shown, the lock rod 31
Alternatively, the check valve 8 can be unlocked by screwing it into the nozzle top wall 9a and tightening it to lock the check valve 8 and loosening it.

FIG. 11 is a longitudinal sectional view of a main part showing another embodiment of the check valve. This is particularly a modification of the structure of the upper member 14 of the check valve 8 and includes the lower member 12
A circular diaphragm 16 is arranged in a space 15 defined by the upper member 14 and the upper member 14, and the diaphragm 16 is brought into contact with a central protrusion 32 provided by projecting downward from the central portion of the upper member 14 in the drawing. The peripheral portion is brought into contact with the lower member 12 around the inlet port 11 over the entire circumference thereof in the same manner as shown in FIGS.
An outlet port 13 which is defined between the lower member 12 and the upper member 14 and which is open to the outside air and which also serves as a discharge port is provided at one position in the circumferential direction.

According to this, it is not necessary to separately provide the bending discharge nozzle 9 as described above, the rib 17 and the radial groove 18 are also unnecessary, and the check valve structure can be made simpler. In addition, the risk of liquid adhesion and solidification can be greatly reduced. Further, in the check valve 8, when the liquid in the flexible packaging bag 1 is poured out, the liquid flowing out from the inlet port 11 to the opposite side of the diaphragm 16 due to the deformation of the diaphragm 16 causes the packaging bag 1 to tilt. Underneath, the flow direction is changed in the space 15 and the liquid is immediately poured out from the outlet port 13 which also serves as the discharge port, and the liquid retention time in the liquid pouring device is the same as the discharge nozzle 9 does not exist. It gets shorter.

Therefore, also by this, the possibility of liquid adhesion and solidification can be reduced and, of course, the liquid remains on the outside of the diaphragm 16 when the flexible packaging bag 1 stands up and returns when the liquid pouring is stopped. The amount of liquid can be made extremely small or almost zero, and it is possible to effectively prevent the residual liquid that has once come into contact with the outside air from coagulating, etc. and from being newly poured out in the next pouring operation. You can By the way, it goes without saying that the check valve shown here can also be provided with a locking means such as the lock rod 31 shown in FIG.
May have a composite structure as shown in FIG.

[0051]

As described above, according to the present invention, it is possible to sufficiently prevent the invasion of outside air, microorganisms and the like into the bag when the liquid pouring device is attached to the flexible packaging bag. Even when the liquid in the bag is repeatedly poured out, it is possible to effectively prevent outside air, microorganisms, dust and the like from entering the bag under the action of the check valve. Moreover, it is possible to reliably prevent the liquid once flowing out of the diaphragm and coming into contact with the outside air from returning to the packaging bag, and to sufficiently prevent the liquid in the packaging bag from being contaminated by microorganisms or the like.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a diagram showing a check valve.

FIG. 3 is a vertical sectional view showing a closed state of an inlet port.

FIG. 4 is a vertical sectional view showing an opened state of an inlet port.

FIG. 5 is a cross-sectional view showing another configuration example of the diaphragm.

FIG. 6 is a vertical cross-sectional view showing another holding mode of the flexible packaging bag.

FIG. 7 is a vertical cross-sectional view showing a manner in which a lead-out nozzle penetrates into an unstretched film.

FIG. 8 is a vertical cross-sectional view showing an example of fixing a lead-out nozzle to a flexible packaging bag.

FIG. 9 is a vertical cross-sectional view illustrating the pouring state of the liquid in the bag.

FIG. 10 is a vertical cross-sectional view illustrating a locking mechanism of a diaphragm.

FIG. 11 is a vertical cross-sectional view showing another check valve.

FIG. 12 is a vertical sectional view showing a conventional technique.

[Explanation of symbols]

1 Flexible packaging bag 2 pouring section 3 outlets 4 Unstretched film 5 Liquid pouring device 6 Tapered end 7 Outlet nozzle 7a Tip opening 7b flange 8 Check valve 9 Bending discharge nozzle 9a Top wall 9b Enlarging part 9c Upper enlarged part 9d Lower expansion part 11 entrance port 12 Lower member 13 Exit port 14 Upper member 15 spaces 16 diaphragm 16a Elastomer base material 16b Gas barrier vapor deposition film 17 Abutment rib 18 radial groove 21 Support frame 22 Base plate 23 Fork claw 24 bands 25 props 26 cases 27 Top wall 28 screw cap 29 outlet 31 Rock Rod 31a spherical protrusion 32 Central protrusion

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3E014 PA01 PB03 PC04 PD23 PE17                       PF06                 3E064 AA01 BA25 BA30 BA36 BB03                       EA12 EA18 EA21 FA03 FA06                       HM01 HR10 HS04                 3H058 AA14 BB03 BB28 CA06 CB06                       CC06 CC11 CD02 DD13 DD15                       EE02 EE03 EE07 EE19

Claims (10)

[Claims] 1. A lead-out nozzle having a tapered end portion that penetrates an unstretched film that seals a spout of a flexible packaging bag,
A liquid pouring device having an inlet port communicating with the outlet nozzle and an outlet port, and a check valve having a diaphragm disposed between the ports to control opening and closing of the inlet port. 2. The liquid pouring device according to claim 1, wherein the leading edge of the tapered end portion of the outlet nozzle has a curved surface. 3. The liquid pouring device according to claim 1, further comprising means for directly or indirectly fixing the outlet nozzle to the soft packaging bag. 4. The liquid pouring device according to claim 1, wherein the diaphragm is made of a material having excellent flexibility. 5. The liquid pouring device according to claim 1, wherein the diaphragm is made of a material having excellent flexibility and gas barrier properties. 6. The liquid pouring device according to claim 5, wherein the diaphragm is made of a composite material of a rubber material and a synthetic resin, a metal material or a glass material. 7. The liquid pouring device according to claim 1, wherein a bent discharge nozzle is connected to the outlet port of the check valve. 8. The check valve according to claim 1, further comprising a rib abutting against the diaphragm and a radial groove communicating with the outlet port from a radial outside of the diaphragm, at a position adjacent to the outlet port. The liquid pouring device according to any of the above. 9. A diaphragm restraint portion which defines an outlet port also serving as a discharge port at one position in the circumferential direction of the check valve, and which abuts substantially the central portion of the diaphragm so that its peripheral portion comes into contact with the periphery of the inlet port. Claim 1 which is provided with
7. The liquid pouring device according to any one of 6 to 6. 10. A lock means for restraining the diaphragm of the check valve at the closed position of the inlet port.
10. The liquid pouring device according to any one of 9 to 10.