WO2002076845A1

WO2002076845A1 - Check valve and liquid container with check valve

Info

Publication number: WO2002076845A1
Application number: PCT/JP2002/002390
Authority: WO
Inventors: Tadashi Hagihara; Naoya Tani
Original assignee: Tadashi Hagihara
Priority date: 2001-03-15
Filing date: 2002-03-13
Publication date: 2002-10-03
Also published as: CN1498184A; CA2441026A1; KR20040012732A; US20040112916A1; EP1386850A1; TW577844B

Abstract

A check valve, wherein a tubular body having a through-passage is installed, a valve element formed with an elastic material having an opening part near the tip thereof is installed so as to cover the tubular body, and a skin body having an opening part near the tip thereof is installed so as to cover the valve element. A liquid container, comprising an outlet for discharging contents, wherein a reverse flow prevention valve having an opening part closed in normal state and opened when a pressure in the container rises is installed at the outlet, a measuring container is installed at the tip of the outlet, and a cap having an intake with a reverse flow prevention valve with an opening part closed in normal state and opened when the pressure in the container is negative is fitted to the opening part, whereby, when the contents once discharged into the measuring container is distributed at the time of metered distribution, the contents beyond a metered volume is prevented from flowing out of a container body.

Description

Specification

Non-return valve and liquid container with non-return valve

The present invention relates to a check valve and a liquid storage container provided with the check valve. Technology background

Conventionally, a slit is provided in an elastic body provided in the mouth of a container, and the slit is pushed open by a liquid or the like extruded by an internal pressure generated by an external pressure applied to the container, and the slit is opened to discharge the liquid and the like. After the external pressure applied to the container body is released after this, the elastic body forms a check valve or plug structure that closes the slit by its own restoring force. There is a device described in Japanese Unexamined Patent Publication No. Hei.

In the former, a plug having a shell-shaped appearance and a dome-shaped cavity inside is formed of an elastic or flexible material, and has at least one slit at its tip.

In the latter, a thin upper wall plate concaved in an arc shape is formed of an elastic material, and a slit is provided at a central portion thereof.

However, in any of the above prior arts, since the elastic portion containing the slit, which is a key point of the valve mechanism, is exposed, the elastic portion may be inadvertently touched.

This elastic portion needs a corresponding elastic force to prevent leakage from the slit. However, if the elastic force is increased more than necessary, it becomes difficult to discharge and the convenience as a container is reduced. Therefore, the force that does not apply excessive elastic force, and the mechanism that does not use anything other than the elastic force of this elastic body to close the slit, originally to keep the slit in close contact Has elasticity Insufficient power alone. Therefore, as shown in Fig. 13, if any external force is applied to the elastic body, the elastic body is easily deformed and the close contact of the slit is released, so that the liquid in the container leaks or conversely, the air inside the container Inhaled.

More specifically, most of the tube containers are made of laminate material, and the elasticity of the tube itself makes the container itself strong. That is, the container body becomes negative pressure due to the restoring force of the container body, and the content pushed out to the nozzle opening may be drawn back into the container again. However, in the former, although measures have been taken to prevent the elastic portion from excessively expanding due to the internal pressure of the container, no provision has been made for preventing the elastic portion from contracting. Therefore, as shown in FIG. 14, the elastic body acts in a direction in which the cylindrical portion is crushed and the slit is opened.

On the other hand, the same can occur in the latter example. In other words, when the pressure inside the container becomes negative, the upper wall that is concave in an arc shape is completely opposite to the above-mentioned technology, and the slit is easily opened.

Both have the disadvantage of inhaling air rather than leaking the contents in such a case. '

As described above, in the past, as a technology for using a slit as a simple valve, only discharge was permitted when the internal pressure of the container was high, and was only stopped when the internal pressure was reduced. There was no technical idea to prevent air from being drawn. For this reason, although the valve mechanism had a very simple structure, it could not be actually used for containers containing foods, cosmetics, chemicals, and other contents that would not be oxidized by contact with air. On the other hand, liquids that need to be measured are various, including chemicals, cosmetics, paints, and detergents.

In the case of chemicals, etc., it is used by measuring from a bottle with a measuring cup Is considered the most. In addition, as a liquid container for detergents, etc., which is used more than once for chemicals, potter caps are used as measuring cups. Pump-type synthetic resin potters are widely used. The former removes the measuring cup from the container body and can be used to measure the required amount freely, but is not suitable for accurate measurement. The latter is equipped with a hand-operated pump at the upper opening of the bottle body made of synthetic resin, and when necessary, presses the pump by hand to discharge the contents. According to this, the amount discharged by one manual push is almost constant.

However, containers equipped with measuring cups are not suitable for accurate weighing and are poorly poured, since their contents are poured out of the container body according to the scale provided on the measuring cup. Also, since the spout is always open, excess contents flowed out of the container body when dispensing the contents measured with the measuring cup. Furthermore, if the cap is loosely tightened, the contents will leak if the container falls down.

In the case of a pump-type bottle, the return spring of the pump is made of metal. Although it is technically possible to use a single material, it is not realistic due to cost issues. With the increasing awareness of environmental preservation in society, the problem of waste disposal cannot be ignored.

Accordingly, the present invention is to solve the above-mentioned problems of the prior art and to provide a check valve which functions reliably and a container provided with the check valve. In addition to solving the above-mentioned conventional problems, the container provided can be made of a single material and, despite its simple structure, can prevent inadvertent discharge with a check valve. It is another object of the present invention to provide a liquid container capable of accurate measurement without an amount of liquid larger than the measured liquid flowing out of the container body. Disclosure of the invention

That is, the check valve of the present invention has the following features.

(1) A valve provided at a discharge port of a fluid container, the valve including a tubular body having a penetrating passage, and a valve body made of an insulative material having an opening in the vicinity of a distal end thereof. And an outer skin having an opening near the distal end so as to cover the valve body.

(2) A valve provided at the discharge port of the fluid container, wherein a cylindrical body having a penetrating passage and a valve body having an opening in the vicinity of the distal end are provided so as to cover the cylindrical body. A cover having an opening is provided so as to cover the valve body, and a protective cap exposing only the opening of the cover is provided.

(3) In the fluid discharge direction, a space is provided between the tip of the tubular body and the inner surface of the outer skin, and the valve body is provided so as to isolate this space from front to back.

(4) The valve body is made of an elastic body, and the opening provided in the vicinity of the top is normally closed by the elastic force of the valve body itself and is a slit that is released by the internal pressure of the container and is opened. .

(5) The slit is a combination of multiple cuts.

(6) The cylindrical body and the valve body are formed by constant molding.

(7) The upper end of the tubular body and the inner surface of the valve body are made compatible with each other, and the passage of the tubular body is branched in the tubular body, and an opening is formed at the top of the position avoiding the opening of the valve body. In normal conditions, the opening of the valve body is closed, and the opening of the cylindrical body is closed by close contact with the upper end surface of the cylindrical body, and the valve body expands in the direction of the discharge port due to an increase in the internal pressure of the container. Occasionally, the close contact between the two is released, and the opening of the valve body is opened so that the contents can be discharged.

(8) The upper end of the cylindrical body and the inner surface of the valve body are formed in a mutually compatible shape, and a projection is provided inside the top of the valve body to fit and close the passage opening of the cylindrical body. An opening is provided around the periphery of the cylinder. The passage is opened and the contents can be discharged when the valve body projection is pushed out toward the discharge port due to the rise in the internal pressure of the container.

(9) The upper end of the tubular body and the inner surface of the valve body are made compatible with each other, and a projection protruding in the direction of the discharge port is provided at the top of the tubular body, and a passage opening is provided around the protrusion, and the top of the valve body Has an opening that fits the projection of the cylindrical body and closes the passage, and the projection of the cylindrical body normally closes the opening of the valve body, but the valve body moves in the direction of the discharge port due to the rise in the internal pressure of the container. The passage is opened when inflated so that the contents can be discharged.

(10) The upper end of the tubular body and the inner surface of the valve body are made to fit each other, and the inside of the top of the valve body is provided with a projection that fits into and closes the passage opening of the tubular body. An opening is provided around the projection, and the valve body is provided so as to be movable in the discharge direction between the tip of the cylindrical body and the inside of the outer body. Further, a valve body is provided between the valve body and the outer body. A spring is provided that normally urges the cylinder in the direction of pressing it.In the normal state, the projection of the valve blocks the opening of the cylinder, but the valve projection protrudes against the above spring due to the rise in the internal pressure of the container. The passage is opened when moving in the exit direction so that the contents can be discharged.

(11) The upper end of the cylindrical body and the inner surface of the valve body are made compatible with each other, and a projection protruding in the direction of the discharge port is provided at the top of the cylindrical body, and a passage opening is provided around the protrusion. The top is provided with an opening adapted to the projection of the tubular body to close the passage, and the valve body is provided so as to be movable in the discharge direction between the tip of the tubular body and the inner side of the outer cover. A spring is provided between the outer shells to bias the valve body against the cylindrical body in the normal state.In the normal state, the projection of the cylindrical body closes the opening of the valve body. When the body moves toward the discharge port against the spring, the passage is opened and the contents can be discharged.

(12) When the external pressure applied to the container is at a certain level, the opening of the valve is open and the contents are discharged from the discharge port. The upper surface shall be in close contact with the inner surface of the outer shell to close the opening of the valve and stop discharging.

Further, a liquid container provided with a check valve according to the present invention is provided with a check valve having the above characteristics, wherein the tube and the container body are formed of a flexible material, a bottle, a gusset bag or a stand bouch. It is characterized by the following.

Further, the liquid container of the present invention has the following features.

(1) A liquid container provided with a discharge port for discharging the contents, which is normally closed and has a check valve with an opening that opens when the internal pressure of the container rises, is provided at the discharge port and the discharge destination is Dispensing by dispensing with a cap equipped with a measuring container and an intake port with a check valve that is normally closed and has an opening that opens due to negative pressure inside the container. At the time-when distributing the contents discharged into the measuring container, the contents shall not flow out of the container main body more than the amount measured from the container main body. (2) A liquid container provided with a discharge port for discharging the contents, a cylindrical body having a penetrating passage, and an opening that is normally closed near the tip and that opens when the container internal pressure increases. A valve body made of an elastic material is provided so as to cover the cylindrical body, and a check valve provided with an outer skin having an opening near the distal end so as to cover the valve body is provided at the discharge port. At the same time, a cap is provided with a measuring container at the discharge destination, and a suction port with a check valve made of an elastic material, which is normally closed near the tip and has an opening that is opened by negative pressure inside the container. By being provided in the opening, when dispensing the contents once discharged into the weighing container at the time of dispensing, the contents shall not flow out of the container body beyond the amount measured from inside the container body.

(3) The opening of the valve is a slit.

(4) The above weighing containers can be replaced with different weighing containers. Be capable. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an external perspective view showing a first embodiment of the present invention. In FIG. 1, 1 is a check valve main body, 2 is a discharge port, and 3 is a container main body. FIG. 2 is a longitudinal sectional view of a main part around the check valve body.

The check valve 2 is composed of a tubular body 4, a valve body 5, an outer shell 6 as shown in FIGS. 3 (a), (b) and (c), respectively, and a protective cap 7 as shown in FIG. As shown in FIGS. 2 and 3, the cylindrical body 4 has a tapered shape at the container body side end 8 in order to reduce the fluid resistance. Since the cylindrical body 4 also has a function of maintaining the shape of the valve body 5, a material having a hardness that is not easily deformed is preferable.

As shown in FIG. 3 (b), the valve element 5 is formed in a hollow shell shape, and a slit 9 is provided at the tip thereof. The valve element 5 is formed of an elastic body such as rubber, and the slit 9 is tightly attached by the elastic force (restoring force) of the valve element 5 itself in a normal state. However, the slit 9 is provided by pressing the container body 3 by hand or the like. When the container is deformed by the external pressure, the close contact of the slit 9 is easily released by the internal pressure of the container, thereby forming an opening.

As shown in FIG. 3 (c), an outer cover 6 is further provided so as to cover the valve 5. The outer cover 6 also has a function of restricting the expansion deformation of the valve 5. The shape is almost the same as that of the valve element 5, but a discharge port 2 which is always open is provided at the tip. It is preferable that the material has some elasticity. The discharge port 2 is adapted to fit the protrusion 12 provided on the cap 11 shown in FIG. 2, and the contents (liquid, semi-fluid) remaining in the discharge port passage 20 due to their close contact. Etc.) from oxidizing on contact with air. Stopped.

The outer shell 6 has a flange portion 13 on the outer surface. The outer shell 6 is fitted to the tip of the cylindrical portion 14 of the container body 3 as shown in FIG. The protection cap 7 is adapted to be screwed into a screw provided outside the cylindrical portion 14 of the container body 3.

If this configuration is not adopted, that is, if there is no cylindrical body as shown in FIG. 14, if the internal pressure of the container becomes negative due to the elastic (restoring) force of the container body 3, the valve element 5 is deformed inward and the slit 9 is opened, or a gap is created between the valve body and the outer shell, and air flows into the container body. In addition, as shown in FIG. 15, in the case where the outer shell 6 is not provided, the slit 9 of the valve body may expand without almost opening. Therefore, it is desirable that the three functions of the cylindrical body 4, the valve body 5, and the outer body 6 always work organically as in the present invention.

As shown in FIGS. 3 and 4, a space A is provided between the distal end 15 of the cylindrical body 4 and the inner surface 16 of the valve body 5, and a space between the valve body distal end 17 and the inner surface 18 of the outer skin. B is provided. The space A is a pool of contents that has passed through the passage 19 of the cylindrical body 4 from the inside of the container body, and the larger this volume is, the more the inner surface 16 of the valve body 5 is pushed by the dispersed pressure. Space B determines the amount of movement of valve element 5. The larger the depth of this space B (the height in the vertical direction in the figure) C, the larger the valve element 5 expands, the larger the slit 9 opens, and the larger the opening. The spaces A and B are appropriately changed according to the viscosity of the contents together with the diameter D of the passage of the cylindrical body 4 and the diameter E of the discharge port shown in FIG. Of the external pressure applied to the container body).

The check valve 2 of the present invention configured as described above operates as shown in FIG.

That is, the inside of the container is The pressure rises, and the contents are pushed out toward the discharge port 2 as shown by the arrow in the figure. The extruded contents enter the space A through the passage 19 of the cylindrical body 4. Then, the internal pressure of the space A rises and pushes the inner surface 16 at the tip of the valve body 5 outward, so that the valve body tip 17 expands while reducing the space B until it contacts the inner surface 18 of the outer body 6. At the same time, the slit 9 provided at the tip of the valve body 5 opens, and the contents flow out and are discharged from the discharge port 2 at the tip of the envelope 6.

When the external pressure of the container body 3 is released, the slit 9 closes due to the elasticity (restoring) force of the valve body 5 and the discharge stops, but the valve mechanism, especially the valve body 5, closes while being immersed in the contents. No air is drawn into the container body 3 side from 5. When not in use, as shown in Fig. 7, when the cap 11 is closed, the projection 12 provided at the center of the cap 11 comes into close contact with the tip of the discharge port 2 and shuts off the air. With such a structure, even if there is a space A inside the valve body 5 and the valve body 5 is easily deformed toward the container body 3 side, at most the spaces A and B partitioned by the valve body 5 In order to balance the pressure between the two, the slit 9 may be pulled into the container body 3 and the slit 9 may be opened, but if it is balanced, the slit 9 returns to the normal state and the slit 9 remains in close contact. As shown in Fig. 7, the cap 11 itself can be of any type, from the fitting type as shown in Fig. 7, to the hinged type (not shown) and the screw-down type. It is necessary to have a structure to block the exit 2.

By adjusting the diameter D of the cylindrical body 4, the diameter E of the discharge port, and the spaces A and B as described above, it is possible to freely control the discharge of the contents from the discharge port 2 from dripping to continuous. Become.

FIGS. 8 (a) to 8 (c) show a slit 9 provided at the tip of the valve body 5, respectively. (A) is a front view when one slit 9 is provided, (b) is a plan view thereof, and (c) is a longitudinal sectional view in a state where the slit is opened.

(A) to ( _e ) of FIG. 9 are plan views of slits 9 having different forms. The opening provided in the valve body 5 is not limited to the slit 9 as described above, and the mechanism is limited as long as it opens when the container internal pressure rises and automatically closes when the container internal pressure is released. It is needless to say that a so-called opening hole may be used as described later.

· FIGS. 10 to 12 show examples of application of the check valve 2 of the present invention to various container bodies 3. FIG. 10 shows a plastic pot in which a container body 3 often used for shampoos and the like can be deformed by external pressure, FIG. 11 shows an example of application to a gusset bag, and FIG. Figures 11 and 12 are both so-called bag-like containers. As described above, the check valve of the present invention can be applied to any type of container that pushes the container body 3 by hand to apply an external pressure to generate an internal pressure in the container body and discharge the contents. Conversely, it cannot be applied to containers such as glass bottles whose container body is not deformed by external pressure.

FIG. 16 to FIG. 20 show another embodiment of the check valve 2 of the present invention. .

FIG. 16 shows a case having two slits, and FIG. 17 shows a case where the tubular body 4 and the valve body 5 are integrally formed. In this case, the entire body may be integrally formed of an elastic material such as rubber, or the cylindrical body 4 may be formed of a hard material such as plastic and covered with the elastic material of the valve body 5. . Even if the entire body is formed of a flexible material, it is possible to suppress inward deformation by providing a sufficient thickness for the cylindrical body portion 21, but preferably, the cylindrical body portion 21 is hard and has an opening. It is better that the top part having softness is soft as long as it has sufficient and sufficient elastic force to close the opening.

In each of FIGS. 18A and 18B, the passage 19 of the cylindrical body 4 is extended to the vicinity of the top portion in contact with the valve body 5 and further branched into two branches. In this case, the top part 15 of the tubular body 4 and the inner end part 16 of the distal end of the valve body 5 are in close contact with each other to close the opening of the passage 19. Therefore, as the valve mechanism, this part and the slit And has a two-stage configuration. That is, as shown by the arrow in FIG. 18 (b), the contents pushed out of the container body 3 and passed through the passage 19 of the cylindrical body 4 push up the valve body 5 to make the cylindrical body end 15 and the valve A space A (reservoir) is created between the inside of the tip of the body 16 and the valve body 5 is further pushed up and expanded by the internal pressure, and the slit 9 is opened and opened. And discharge from the discharge port 2 of the outer cover 6. Needless to say, the former alone fulfills a sufficient function as a valve, so that the valve body 5 may be provided not with the slit 9 but with an opening hole, and may be used depending on the viscosity of the liquid used.

FIG. 19 and FIG. 20 show a case with a discharge adjusting mechanism. That is, if the valve and the discharge port are open at all times, the discharge rate changes with the rise of the container internal pressure, but if the internal pressure of the container body 3 rises carelessly, the contents will be discharged from the discharge port 2 You will jump out. Therefore, it is a mechanism that can prevent such a situation. In FIG. 19, (a) is a vertical sectional view in a normal state, (b) is a plan view of a valve body, FIG. 20 (a) is a vertical sectional view in a discharge state, and (b) is a longitudinal section in a closed state. FIG. In each case, the arrow indicates the flow of the contents (liquid, semi-liquid, etc.). That is, the valve body 5 is provided with a projection 23 adapted to the opening 22 at the tip of the cylindrical body 4 facing inward, and in the normal state shown in FIG. The tip opening 22 and the projection 23 of the valve element 5 are fitted and closely fitted to each other to close the opening 22 of the passageway 19. Then, the contents pushed out by the rise of the internal pressure of the container body 3 and having passed through the passage 19 push up the projections 23 of the valve body 5 as shown in FIG. Then, a gap is opened, so that the gas flows out from the gap, flows out from an opening 24 provided around the projection 23 of the valve body 5, and is discharged from the discharge port 2 of the outer cover 6.

However, when the internal pressure of the container body is further increased, the projections 23 of the valve element 5 are further pushed up as shown in FIG. Abuts the lower end 25 of the You.

With this configuration, the contents are discharged only when the internal pressure of the container body is constant. In other words, the contents are prevented from being discharged in response to an unfavorable external pressure such as inadvertently pressing the container body 3. Therefore, this configuration is extremely desirable when it is necessary to drop the contents, and can prevent continuous ejection.

The width of the pressure applied to the container body 3 from which the contents can be discharged is set, as described above, by the inner diameter D of the passage 19 of the cylindrical body 4, the opening diameter of the valve body 5, as shown in FIG.加え In addition to the diameter E of the discharge port 2 of the outer cover 6, the strength of the elastic force of the valve 5 and the distance from the upper end of the valve 5 to the lower end of the discharge port of the outer cover 6 may be appropriately adjusted. In this case, when it is necessary to ensure the volume of the space B between the valve element 5 and the outer cover 6, a projection may be provided on the top of the valve element 5.

FIGS. 21 and 22 show that the projection 26 provided on the top of the tubular body 4 and the opening 27 provided in the valve body 5 match to form a valve mechanism. FIG. 21 (a) is a vertical sectional view of a normal state, and FIG. 21 (b) is a plan view of a cylindrical body 4, and FIG. 22 is a vertical sectional view of a discharge state.

An opening hole 22 is provided around the projection 26 of the cylindrical body 4. Although four openings are shown in the figure, it goes without saying that any number of openings may be provided.

As shown in FIG. 22, the content pushed out from the container body 3 (not shown) pushes the valve element 5 closing the opening 22 through the passage 19 of the cylindrical body 4 from the inside. Then, the opening hole 27 of the valve body 5 that has been in close contact with the projection 26 of the cylindrical body 4 is pushed up to form a gap between the two, and the contents are discharged from the discharge port 2 of the outer cover 6.

23 to 25 show still another embodiment.

In both cases, the valve body 5 is provided so as to be movable in a space B provided between the cylindrical body 4 and the outer body 6. In this embodiment, a split is provided between the valve body 5 and the outer body 6. The valve body 5 is provided so as to be in close contact with the tubular body 6 in a normal state.

The basic valve mechanism is the same as each configuration described above. That is, FIG. 23 shows a type in which the projection 23 provided on the valve element 5 is in close contact with the tip opening 22 of the cylindrical body 4, and FIG. And the opening 27 of the valve element 5 are in close contact with each other.

In any case, when the contents pushed out by the rise in the internal pressure of the container body 3 push up the valve body 5, the valve body 5 slides and opens against the spring 28, so that the contents flow out therefrom and the outer skin Discharge from discharge port 2 of body 6. 23 and 24, as in the example of FIG. 19, the valve element 5 closes the discharge port 2 of the outer cover 6 to stop discharge when the internal pressure of the container is equal to or more than a certain value. FIG. 23 shows a normal state, FIG. 24 (a) shows a discharge state, and FIG. 24 (b) shows a closed state.

FIG. 26 shows a case where the measuring cap 29 is provided by forming the upper part of the protective cap 7 into a cup shape. The contents discharged from the discharge port 2 can be measured. In this case, the measuring section 29 is desirably formed of a transparent material.

In this example, after removing the cap 11, the measuring unit 29 is turned upward and the container body 3 is pressed to measure the required amount. Very suitable for chemical and detergent containers. Hereinafter, an embodiment in which the check valve of the present invention is applied to a container having a liquid measuring function will be described in detail.

FIG. 27 is a perspective view showing a liquid measuring container of the present invention. In the figure, 30 is a liquid measuring container, 3 is a container main body, 7 is a protective cap, 29 is a measuring container (hereinafter a cup), 31 is an intake port, and 32 is a suction pipe.

FIG. 28 is a longitudinal sectional view of the vicinity of the protective cap 7 which is a main part of the present invention. _{C In the} central part inside the protective cap 7, a check valve 1 is provided in a concave portion thereof. The discharge port 2 at the tip is inserted into an opening 32 provided in the center of the protective cap 7 and opens into the forcep 29.

The check valve 1 is inserted into the cylindrical member 14, and the cylindrical member 14 is fitted in a concave portion inside the protective cap 7. The engagement between the protective cap 7 and the cylindrical member 14 may be performed using screws. A suction pipe 33 hangs below the cylindrical member 14, and the tip of the suction pipe 33 reaches the bottom of the container body 3. This is to suck up the liquid from the bottom of the container body 3. The thickness (inner diameter) of the suction pipe 33 is changed according to the viscosity of the liquid used. For high viscosity liquids, increase the inner diameter. Conversely, for low viscosity liquids, reduce the diameter.

In FIG. 28, 11 is a lid of the cup 29. The lid 11 has a T-shaped longitudinal section, that is, a shape in which a bar-shaped member 35 is protruded from the center of the disk-shaped member 34, and a step 36 is formed on the outer periphery of the disk-shaped portion 34. As shown in Fig. 29, it is fitted to the upper end 37 of the cup 29, and the tip end of the rod-shaped member 35 is thinner and abuts the tip opening 2 of the check valve 1 to close the opening. It has become.

The cup 29 is fixed to the upper end of the protective cap 7 with a screw. The connection between the protective cap 7 and the cup 29 may be made by fitting other than screws, but it is necessary to prevent leakage of liquid accumulated in the cup 29. The use of O-rings is also effective for this purpose. However, cup 29 should not be stuck and should be removable. By doing so, it is possible to easily remove and wash the cup 29, and to replace the cup 29 with a different capacity according to the amount to be measured as shown in Fig. 30. Is desirable. The cup 29 is preferably made of a transparent material, and a scale is preferably provided so that the amount can be easily measured from the side.

As shown in FIG. 28, an inlet 38 is provided on the side of the protective cap 7. In Fig. 28, the protective cap 7 penetrates from the side to the center. Holes 39 are provided. There is a step 40 inside the protective cap, and a gap 41 is provided between the protection cap and the outer periphery of the cylindrical member 14. The through hole 39 opens into the gap 41.

The side opening of the through hole 39 has a larger inner diameter at a certain depth, the cylindrical member 42 is fitted into the portion, the check valve 43 is inserted therein, and the cap 4 is further inserted. The check valve 4 prevents the check valve 4 3 from coming off. The cap 4 has an air inlet 45 at its center.

The check valve 43 has a simpler structure than the check valve 1 in the discharge path, and has only the valve element 5. Needless to say, the use of the same structure as the check valve 1 is not denied. The intake port should be closed when the pressure in the container body is positive, and open when the pressure in the container is negative.

Although the intake port 38 is provided in the cap 7 in this embodiment, it is needless to say that the intake port 38 may be provided in the container body.

The use of the liquid measuring container of the present invention configured as described above is as follows.

As shown in FIG. 31, the container body 3 is pushed with a finger or the like to increase the internal pressure. Due to the increase of the internal pressure, the contents (liquid) enter the suction pipe 32 and go to the discharge port. Then, as shown in FIG. 32, the check valve 1 is opened and flows out into the cup 29. At this time, only the check valve 1 on the discharge side is open, and the check valve 43 on the intake side is closed. Continue to pressurize the container body 3 until the liquid level reaches the scale of the cup.

FIG. 33 shows a state in which a desired amount has been measured in the cup. When the desired amount has been accumulated in the cup 29, when the hand pressing the container body 3 is released and the external pressure applied to the container body 3 is eliminated, the check valve 1 is automatically closed by the elasticity of the valve body 5. Then, as shown in Fig. 34, the container body becomes negative pressure due to the restoring force due to the elasticity of the container body 3, the check valve 43 of the intake port 38 opens, and the outside air is It flows into the body. When the inner pressure of the container body and the outer pressure of the container balance, the check valve 43 of the intake port 38 is automatically closed by its own elastic force. Then just dispense the contents in the cup.

As a result, when the measured contents are discharged (distributed) from the cup, the contents do not flow excessively from the discharge port 2 and the contents are not discharged even when the container body is accidentally turned over. Industrial applicability

Since the present invention is configured as described above, it is possible to provide a check valve suitable for dropping and discharging contents (liquid, semi-fluid, etc.) and a container having the check valve and having high storage stability.

In other words, it is very easy to control the pressure applied to the container in order to discharge and discharge the contents, and since the valve mechanism is not exposed, the valve mechanism does not receive external pressure etc. Yes, the backflow of air into the container body can be reliably prevented.

Therefore, it can be used very suitably for anaerobic contents (foods, cosmetics, chemicals, etc.) that dislike contact with air.

The discharge amount of the content can also be freely adjusted according to the viscosity.

Further, according to the liquid container having the measuring function of the present invention, a liquid container having flexibility can be applied to various containers, and the measurement can be performed without difficulty while easily adjusting the discharge amount of the contents.

Also, even if the container body is inadvertently pressurized, the container will not be discharged, so that it will not be discharged from the container body more than the measured amount, so that the measurement accuracy is high.

Furthermore, since the measuring force cup can be removed and washed, it is sanitary. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an external perspective view showing a first embodiment of a check valve of the present invention. FIG. 2 is a longitudinal sectional view of the main part. Fig. 3 (a) is a longitudinal section of the tubular body, (b) is the valve body, and (c) is the longitudinal section of the outer shell. Fig. 4 is an illustration of a space partitioned by a valve. FIG. 5 is an explanatory diagram showing adjustment dimensions. FIG. 6 is an explanatory diagram showing the operation. FIG. 7 is an explanatory view showing a state in which the cap is closed. Fig. 8 (a) is a front view when one slit is provided, (b) is a plan view thereof, and (c) is a longitudinal sectional view showing a state where the slit is opened. FIG. 9 is an explanatory view showing an application example of the slits (a) to (e). FIG. 10 is an explanatory diagram showing an example of application to a bottle. FIG. 11 is an explanatory diagram showing an example of application to a gusset bag. FIG. 12 is an explanatory diagram showing an example of application to a stand patch. FIG. 13 is an explanatory view showing a conventional technique. FIG. 14 and FIG. 15 are explanatory diagrams when some functions are omitted. FIG. 16 and FIG. 17 are longitudinal cross-sectional views of essential parts showing an example of variations of the tubular body and the valve body. FIG. 8 is a vertical sectional view of a main part showing an example of variations of a cylindrical body and a valve body, wherein (a) shows a normal state and (b) shows a discharge state. FIG. 19 (a) is a vertical sectional view of a main part of a normal state showing an example of a variation between a cylindrical body and a valve body, and FIG. 19 (b) is a plan view of the valve body. FIG. 20 is a longitudinal sectional view of an essential part showing an example of variations of a tubular body and a valve body. (A) shows a discharge state and (b) shows a closed state. FIG. 21 (a) is a vertical sectional view of an essential part showing an example of a variation of a tubular body and a valve body, and (b) is a plan view of the tubular body. FIG. 22 is a longitudinal sectional view of a main part showing a discharge state in an example of the arranging of the cylindrical body and the valve body. FIG. 23 is a longitudinal sectional view of a main part showing a normal state in an example of a parallel relation between a tubular body and a valve body according to the second embodiment. FIG. 24 is a vertical sectional view of an essential part showing an example of a displacement of a cylindrical body and a valve body in the second embodiment, in which (a) shows a discharge state and (b) shows a closed state. FIG. 25 shows the cylindrical body and the valve body in the second embodiment. In an example of the variation, ( _a ) is a normal state and (b) is a main part longitudinal sectional view showing a discharge state. FIG. 26 is a conceptual diagram when the check valve of the present invention is applied to a container having a liquid measuring function. FIG. 27 is a perspective view showing a first embodiment of a container having a liquid measuring function of the present invention. FIG. 28 is a longitudinal sectional view of an essential part with the lid removed. FIG. 29 is a longitudinal sectional view of an essential part with the lid attached. FIG. 30 is a perspective view of a main part showing a state where a measuring container is replaced. FIG. 31 is a perspective view showing a use state. FIG. 32 is a longitudinal sectional view of a main part showing a discharge state. FIG. 33 is a longitudinal sectional view of a main part showing a weighing completed state. FIG. 34 is a vertical cross-sectional view of a main part showing an outside air suction state. .

Claims

1. A valve provided at a discharge port of a fluid container, the valve including a tubular body having a penetrating passage, and a valve body made of an elastic material having an opening in the vicinity of a distal end provided to cover the tubular body; A check valve characterized in that an outer shell body having an opening near the distal end is provided so as to cover the valve body.

2. A valve provided at the discharge port of the fluid container, which is provided with a tubular body having a penetrating passage, and a valve body having an opening near the distal end so as to cover the tubular body, and further provided near the distal end. A non-return valve, comprising: an outer cover having an opening so as to cover the valve body; and a protective cap exposing only the opening of the outer cover.

3. The reverse of claim 1 or 2, wherein a space is provided between the distal end of the tubular body and the inner surface of the outer skin in the fluid discharge direction, and the valve body is provided so as to isolate this space from front to back. Stop valve.

4. The valve body is made of an elastic body, and the opening provided in the vicinity of the top is a slit that normally closes and closes due to the elastic force of the valve body itself and is opened when the close contact is released by the internal pressure of the container. The check valve according to any one of the above.

5. The check valve according to claim 4, wherein the slit is formed by a combination of a plurality of cuts.

6. The check valve according to any one of claims 1 to 5, wherein the cylindrical body and the valve body are formed in a fixed manner.

7. The upper end of the tubular body and the inner surface of the valve body are made compatible with each other, and the passage of the tubular body is branched in the tubular body, and an opening is provided at the top of the position avoiding the opening of the valve body. However, under normal conditions, the opening of the valve body is closed, and the opening of the tubular body is closed by being in close contact with the upper end surface of the tubular body, and when the valve body expands in the direction of the discharge port due to an increase in the internal pressure of the container. The reverse of any one of claims 1 to 3, wherein the close contact between the two is released and the opening of the valve body is opened so that the contents can be discharged. Stop valve.

8. The upper end of the tubular body and the inner surface of the valve body are shaped to be compatible with each other, and the inside of the top of the valve body is provided with a projection that fits into and closes the passage opening of the tubular body. In the normal state, the projection of the valve plugs the opening of the cylindrical body, but when the projection of the valve is pushed toward the discharge port due to the rise in the internal pressure of the container, the passage is opened and the contents are released. The check valve according to any one of claims 1 to 3, which is capable of discharging.

9. The upper end of the cylindrical body and the inner surface of the valve body are made compatible with each other, and a projection protruding in the direction of the discharge port is provided at the top of the cylindrical body, and a passage opening is provided around the protrusion. Has an opening that fits the projection of the tubular body and closes the passage, and the projection of the tubular body normally covers the opening of the valve body, but the valve body expands in the direction of the discharge port due to an increase in the container internal pressure. The check valve according to any one of claims 1 to 3, wherein the passage is opened when the operation is performed, and the contents can be discharged.

10. The upper end of the tubular body and the inner surface of the valve body have a shape that is compatible with each other, and a projection that fits into and closes the passage opening of the tubular body is provided inside the top of the valve body. The valve body is provided so as to be movable in the discharge direction between the tip of the tubular body and the inside of the outer skin, and the valve body is normally placed between the valve body and the outer body. A spring is provided that urges the valve in the direction of pressing it against the cylindrical body.In normal conditions, the projection of the valve body closes the opening of the cylindrical body. The check valve according to any one of claims 1 to 3, wherein the passage is opened when moved in the direction so that the contents can be discharged.

1 1. The upper end of the cylindrical body and the inner surface of the valve body are made compatible with each other, and a projection protruding in the direction of the discharge port is provided at the top of the cylindrical body and a passage opening is provided around the protrusion. Is provided with an opening that fits the projection of the tubular body and closes the passage, and the valve body is provided so as to be movable in the discharge direction between the tip of the tubular body and the inside of the outer skin. Energized between the bodies in the direction that normally pushes the valve against the cylindrical body In the normal state, the projection of the cylindrical body closes the opening of the valve body, but the passage is opened when the valve body moves in the direction of the discharge port against the above-mentioned spring due to the rise in the internal pressure of the container. The check valve according to any one of claims 1 to 3, wherein the check valve can discharge the contents.

1 2. When the external pressure applied to the container is a certain level, the opening of the valve is open and the contents are discharged from the discharge port, but when it exceeds a certain size, the upper surface of the valve is placed inside the outer shell. 12. The check valve according to claim 7, wherein the check valve closes an opening of the valve body in close contact with a side surface to stop discharge.

13. A liquid container provided with the check valve according to any one of 1 to 11 above.

14. The liquid container provided with the check valve according to claim 12, wherein the container is a bottle formed of a flexible material.

15. The liquid container provided with the check valve according to claim 12, wherein the container is a gusset bag.

16. The liquid container provided with the check valve according to claim 12, wherein the container is a stand bouch.

17. A liquid container equipped with a discharge port for discharging the contents, which is normally closed and has a check valve with an opening that opens when the internal pressure of the container rises, is provided at the discharge port and the discharge destination is Dispensing by providing a cap with a measuring container and an intake port with a check valve that is normally closed and has an opening that opens due to negative pressure inside the container. A liquid container equipped with a check valve, characterized in that when dispensing the contents once discharged into a measuring container, the contents do not flow out of the container body beyond the amount measured from the container body.

18. A liquid container provided with a discharge port for discharging the contents, a cylindrical body having a penetrating passage, and an opening that is normally closed near the tip and that opens when the container internal pressure increases. Covering this cylindrical body with a valve body made of elastic material A check valve is provided at the outlet, and a weighing container is provided at the discharge destination, and a measuring container is provided at the discharge destination. In addition, a cap equipped with an intake port having a check valve made of an elastic material, which is normally closed and provided with an opening that is opened by negative pressure in the container, is provided at the opening, so that one-time A liquid container provided with a check valve characterized in that, when dispensing the contents discharged into the measuring container, the contents do not flow out of the container main body beyond the amount measured from inside the container main body.

19. The liquid container provided with the check valve according to claim 18, wherein the opening of the valve body is a slit.