JP7575932B2 - Spouts and spouted pouch containers - Google Patents

Description

The present invention relates to a spout, and in particular to a spout equipped with a mechanism for preventing leakage of the contents.

In the above technical field, Patent Document 1 discloses a flow path forming member (spout) equipped with a movable valve (check valve) that can only be displaced in the pouring direction of the contents to prevent the contents from flying out of a tilted packaging bag when pouring the contents from the packaging bag into a container.

JP 2018-131243 A

With the spout described in Patent Document 1, the liquid content flows out the moment the bag container is lifted and tilted to fill the refillable container with the liquid content. Therefore, if the bag container cannot be moved properly, there is a possibility that the refillable container will be soiled with the liquid content. Also, if the user grips the body of the bag container too tightly, the liquid content may overflow from the bag container, similarly soiling the surrounding area.

Therefore, the present invention relates to a spout that can prevent liquid leakage from a bag container when refilling the liquid content of a refillable container.

The present invention relates to a spout that is attached to a container that contains a liquid content, forms a flow path for the liquid content, and has a mechanism for preventing leakage of the liquid content, the mechanism having a movable valve that displaces in a pouring direction of the liquid content in response to an applied pressure to form a flow path for the liquid content, and an annular closing part that is arranged upstream of the movable valve in the pouring direction with respect to the pouring direction, the closing part closing a gap that is provided when the movable valve is not being applied with the pressure and is not displaced, and the applied pressure is a negative pressure applied to the movable valve from outside the spout or a positive pressure applied to the movable valve from inside the container.

The present invention also relates to a spouted bag container equipped with the above-mentioned spout.

The spout of the present invention can prevent leakage of liquid when refilling the liquid content. In addition, the spout of the present invention can easily and accurately align the spout attached to the inner container with the locking portion for locking the spout provided on the outer container.

1A is a cross-sectional view of a spout according to a first embodiment of the present invention before a flow path is formed, and FIG. 1B is a cross-sectional view of the spout after the flow path is formed. 1A is a perspective view, FIG. 1B is a top view, FIG. 1C is a side view, and FIG. 1A is a perspective view, FIG. 1B is a top view, FIG. 1C is a side view, FIG. 1D is a cross-sectional view taken along line AA, and FIG. 1E is a bottom view of a spout holder according to a first embodiment of the present invention. FIG. 1 is a perspective view of a movable valve of a spout according to a first embodiment of the present invention, showing (a) a bottom view, (b) a bottom view, (c) a side view, (d) an A-A cross-sectional view, and (e) a top view. 1A and 1B are a perspective view and a side view, respectively, of a cap portion of a spout according to a first embodiment of the present invention. 1A is a cross-sectional view of a spout according to a first embodiment of the present invention before a flow path is formed, and FIG. 1B is a cross-sectional view of the spout after the flow path is formed. 1A to 1D are perspective views showing an example of a container to which a spout according to a first embodiment of the present invention can be attached. 1A and 1B are side views showing an example of a spout portion that can be attached to a spout according to a first embodiment of the present invention. 11A is a cross-sectional view of a spout according to a second embodiment of the present invention before a flow path is formed, and FIG. 11B is a cross-sectional view of the spout after the flow path is formed. 13A is a perspective view, FIG. 13B is a side view, and FIG. 13C is a top view of a position restriction portion for a spout according to a second embodiment of the present invention. 11A is a cross-sectional view of a spout according to a second embodiment of the present invention before a flow path is formed, and FIG. 11B is a cross-sectional view of the spout after the flow path is formed. 13A is a perspective view, FIG. 13B is a side view, FIG. 13C is a top view, and FIG. 13D is a bottom view of a position restriction portion for a spout according to a second embodiment of the present invention. FIG. 11 is a cross-sectional view of a spout according to a third embodiment of the present invention before a flow path is formed.

[First embodiment]
Next, a spout according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 8. The spout 20 has a base 20a, a male screw portion 20b, a tube portion 20c, and an opening 20d. The tube portion 20c is a cylindrical member that stands from the base 20a in the pouring direction 22, and corresponds to the body of the spout 20. Two male screw portions 20b are provided on the downstream side of the outer peripheral surface of the tube portion 20c in the pouring direction 22, but the number of threads is not limited to this. The spout 20 is a member that is attached to the pouring portion of a bag-shaped container (bag container), for example, and forms a flow path for pouring out the content liquid contained in the bag-shaped container. The opening 20d is an outlet for the content liquid, is provided at the most downstream position in the pouring direction of the tube portion 20c, and is open to the outside. The content liquid passes through the space inside the tube portion 20c and is poured out from the opening 20d in the pouring direction 22. The base 20a is disposed on the top surface side of the bag-shaped container, and is fixed, for example, by being inserted between the front film and the back film of the top surface.

The outer peripheral surface of the spout 20 is provided with a male thread portion 20b, and a female thread portion provided on the inner peripheral surface of the overcap or cap 23 engages with the male thread portion 20b to cap the spout 20. In other words, the overcap or cap 23 is a member that is screwed onto the spout 20 and has a sealing surface portion that comes into close contact with and seals the spout 20's spout outlet, and is a member that is used to open or close the outlet. When the liquid content contained in the container is to be used, the overcap or cap 23 is removed and the liquid content is poured out. Once the liquid content has been poured out, the overcap is closed to close the spout 20's outlet.

The spout 20 has a leakage prevention mechanism 21. In other words, the spout 20 has a mechanism for preventing leakage on the flow path of the liquid contents contained in the bag-shaped container. The leakage prevention mechanism 21 has a movable valve 21a that displaces in the pouring direction of the liquid contents according to the applied pressure to form a flow path for the liquid contents, and a bottom 27d (closing portion) that is located upstream of the movable valve 21a in the pouring direction.

The movable valve 21a is housed inside the holder 27. The holder 27 is a cylindrical (annular) member with an open top surface (open top plate) and a circular hole that penetrates part of the bottom surface (see FIG. 3, etc.). The movable valve 21a is placed on the inside bottom surface of the holder 27.

The holder 27 also has a flange portion 27a on at least a part of its inner circumferential surface that positions the movable valve 21a at a predetermined position. The flange portion 27a is provided on the discharge direction side of the movable valve 21a, thereby restricting the liquid leakage prevention mechanism 21 from moving in the discharge direction. The flange portion 27a is a protruding portion that protrudes from the surface of the inner circumferential surface of the holder 27 in the radial direction of the holder 27, and is a raised portion that has an arch shape (the shape of a part of a circular arc) in cross section. The flange portion 27a is provided at a height position equivalent to the thickness of the movable valve 21a from the bottom surface of the holder 27. By providing the flange portion 27a at such a height position, the movable valve 21a is accommodated inside the holder 27 without any gaps. Here, the outer diameter of the movable valve 21a is the same as or smaller than the inner diameter of the holder 27.

Inside the holder 27, the movable valve 21a is positioned directly below the flange portion 27a. By positioning it directly below the flange portion 27a, the movable valve 21a will not move or shift position inside the holder 27 even if the spout 20 is subjected to vibration or turned upside down. In other words, when the movable valve 21a tries to move inside the holder 27, it gets caught on the flange portion 27a, restricting the movement of the movable valve 21a.

Next, as shown in Figs. 1 and 3, the holder 27 has a bottom 27d (closed portion) having a pouring hole 27e for pouring out the content liquid. The bottom 27d also has a convex portion 27c (convex portion) extending in the pouring direction 22 along the edge of the pouring hole 27e. The pouring hole 27e is a circular hole when viewed from above. The convex portion 27c is a member provided along the edge of the pouring hole 27e, and is an annular member when viewed from above, and is a protrusion protruding from the upper surface of the bottom 27d in the pouring direction 22 (upward) when viewed from the side. When the central valve body 21c of the movable valve 21a is not displaced, the liquid leakage prevention mechanism 21 is in a state of being fitted into the convex portion 27c of the bottom 27d, and the gap formed between the central valve body 21c and the peripheral portion 21e is closed by the bottom 27d, making it possible to close the flow path 24. Therefore, even when the spout 20 is not covered, the flow path 24 can be closed. Furthermore, the holder 27 has a claw leg portion 27b. The claw leg portion 27b is a long and thin rod-shaped member that protrudes from the outer bottom surface portion of the holder 27 toward the outside of the holder 27, and is a member having a claw provided at the tip portion on the opposite side (vertically downward) from the bottom surface portion of the holder 27. When the holder 27 is inserted into a hole provided in the bottom surface portion of the spout 20, the claw portion of the claw leg portion 27b is engaged so as to be caught on the outer bottom surface portion of the base portion 20a of the spout 20, and the holder 27 is fixed inside the spout 20. When the claw leg portion 27b is engaged with the spout 20 in this way, the claw resists the force pulling the holder 27 in the pouring direction 22, so that the holder 27 does not come off the spout 20. Note that, in the example described here, three hook legs 27b are provided at equal intervals on the outer bottom surface, but the number of hook legs 27b is not limited to this.

As shown in FIG. 4, the movable valve 21a has a central valve body 21c, a connection support portion 21d, and a peripheral portion 21e. The movable valve 21a is a circular member having a predetermined thickness. The central valve body 21c is disposed in the center of the circular movable valve 21a, and is a circular member surrounded by the peripheral portion 21e, and is a member thinner than the peripheral portion 21e. The peripheral portion 21e is also an annular member. The central valve body 21c is displaced in the pouring direction 22 of the content liquid according to the pressure applied to the movable valve 21a. As the central valve body 21c is displaced, a flow path 24 of the content liquid is formed as shown in FIG. 1(b). The central valve body 21c and the peripheral portion 21e are connected by the connection support portion 21d described later, but a gap is formed between the central valve body 21c and the peripheral portion 21e (see FIG. 4). When the central valve body 21c is not displaced, this gap is blocked by the bottom 27d having the protrusion 27c (see FIG. 1, etc.). In other words, the bottom 27d is a member that functions as a gap closing portion.

Here, the pressure applied to the central valve body 21c of the movable valve 21a is a negative pressure 26 applied to the central valve body 21c from outside the spout 20 or a positive pressure 25 applied to the central valve body 21c from inside the bag-shaped container. The negative pressure 26 applied to the central valve body 21c is, for example, a force that pulls the central valve body 21c vertically upward (a lifting force). For example, it is a pressure applied to the central valve body 21c by attaching an exhaust device to the spout 20 and exhausting or sucking in the air in the space between the spout 20's spout outlet and the movable valve 21a. In addition, the positive pressure 25 applied to the central valve body 21c is, for example, an outflow pressure, which is a pressure applied when the content liquid contained in the bag-shaped container flows out to the outside, and is a force that pushes the central valve body 21c upward from below in the vertical direction.

The central valve body 21c is connected to the peripheral portion 21e of the movable valve 21a by three connection support parts 21d (see FIG. 4, etc.). The connection support parts 21d are elongated, thin, rod-like members that are Z-shaped. One end of the connection support parts 21d is connected to the central valve body 21c, and the other end is connected to the peripheral portion 21e, thereby connecting the central valve body 21c and the peripheral portion 21e.

When pressure is applied to the central valve body 21c, the central valve body 21c is displaced by an amount corresponding to the pressure applied in the pouring direction 22. As the central valve body 21c is displaced, a flow path 24 through which the content liquid flows is formed between the central valve body 21c and the peripheral portion 21e. In other words, a connection support portion 21d is provided between the central valve body 21c and the peripheral portion 21e, but a gap is formed in the portion where the connection support portion 21d is not present, and this gap forms part of the flow path 24.

The connection support part 21d is a member having an elastic function (flexible member) and has a shape that combines an arc, a straight line extending from one end of the arc toward the peripheral part 21e, and a straight line extending from the other end of the arc toward the central valve body 21c. In this way, by arranging the part of the connection support part 21d that is connected to the peripheral part 21e (the straight line part on one end side) and the part of the connection support part 21d that is connected to the central valve body 21c (the straight line part on the other end side) apart from each other, the displacement amount of the connection support part 21d as a whole can be increased. Note that the shape of the connection support part 21d is not limited to the shape shown here, and may be any shape that can connect the central valve body 21c and the peripheral part 21e and support the central valve body 21c. For example, it may be a shape consisting of four straight lines extending from each of the positions that divide the peripheral part 21e into four equal parts toward the center of the central valve body 21c. The central valve body 21c is displaced within the range of the elastic region of the connection support part 21d. When pressure is applied to the central valve body 21c and the central valve body 21c is displaced, the connection support part 21d is pulled by the displacement of the central valve body 21c and undergoes elastic deformation, limiting the movable range of the central valve body 21c while supporting the central valve body 21c. When the pressure applied to the central valve body 21c is removed, the elastic force of the connection support part 21d causes the central valve body 21c to return to its original position. In other words, the central valve body 21c moves in the direction opposite to the pouring direction 22 and finally returns to its original position. From the viewpoint of the displacement amount (movable range) of the central valve body 21c, the shape of the connection support part 21d that combines a circular arc and two straight lines as shown in FIG. 4 is advantageous because it can increase the displacement amount.

When the central valve body 21c is displaced beyond the elastic range of the connection support portion 21d, that is, beyond the elastic limit, the connection support portion 21d breaks. The central valve body 21c, the connection support portion 21d, and the peripheral portion 21e may all be made of the same material, or the connection support portion 21d may be made of an elastic material and the central valve body 21c and the peripheral portion 21e may be made of other materials.

Next, referring to FIG. 5, the cap 23 has an internal thread on its inner circumferential surface, and the internal thread and the external thread 20b allow the cap 23 to be attached and detached to the spout 20. The cap 23 has a valve disc holder 23a, which is a long, thin rod-shaped member, extending downward from the inner surface of the sealing surface. The tip of the valve disc holder 23a on the side opposite the sealing surface protrudes from the bottom surface of the cap 23. In other words, the length of the valve disc holder 23a is at least greater than the vertical thickness width of the cap 23.

When the cap 23 is attached to the spout 20 (Fig. 1(a)), the valve body holding member 23a may be positioned with a small gap from the central valve body 21c of the movable valve 21a, or may be in contact with it. In this state, the movable valve 21a is in contact with the valve body holding member 23a from above in the vertical direction and with the convex portion 27c of the holder 27 from below in the vertical direction, so the movable valve 21a cannot move in either the up or down direction.

When the movable valve 21a is not displaced, the protrusion 27c supports the central valve body 21c of the movable valve 21a so as to lift it slightly from below (pushing the central valve body 21c slightly downstream), which generates a force pressing the movable valve 21a downward (a force pressing the movable valve 21a in the opposite direction to the pouring direction). The outer peripheral surface of the cap 23 is also engraved with multiple grooves, which act as a non-slip surface when the user removes or attaches the cap 23.

Also, as shown in FIG. 6, the spout 20 may not have a holder 27. In the spout 20, the liquid leakage prevention mechanism 21 is fitted to the spout 20 by the rib 20e. The bottom 20g of the spout 20 has a pouring hole 20h through which the content liquid flows out. The protrusion 20f extends in the pouring direction 22 along the edge of the pouring hole 20h. The pouring hole 20h is a circular hole, and the protrusion 20f is also a circular (annular) member.

When no pressure is applied to the movable valve 21a and it is not displaced, the liquid leakage prevention mechanism 21 is engaged with the convex portion 20f, and the gap provided in the liquid leakage prevention mechanism 21 to form the flow path 24 is closed by the bottom portion 20g. In the spout 20, the movable valve 21a of the liquid leakage prevention mechanism 21 is displaced in the pouring direction 22, so that the gap provided in the liquid leakage prevention mechanism 21 forms part of the flow path 24 of the content liquid. In other words, the gap in the liquid leakage prevention mechanism 21 exists regardless of whether the movable valve 21a is displaced, so if the gap is not blocked when the movable valve 21a is not displaced, liquid leakage cannot be prevented. Therefore, the bottom portion 20g having the convex portion 20f functions as a gap closing portion that closes the gap. Therefore, even when the movable valve 21a is not displaced, the gap can be closed, so that the content liquid does not leak even when the spout 20 is not capped.

In this way, the bottom 20g having the convex portion 20f is configured to block the gap (flow path 24), so the liquid contents will not flow out, for example, even if the container 28 is placed on its side, that is, the container 28 is placed with the opening of the spout 20 facing horizontally. In this way, the liquid contents will not flow out even if the container 28 is placed on its side due to space restrictions when storing the container 28, the insertion portion of the washing machine cartridge is sideways, or the user accidentally places it sideways.

In addition, even if the container 28 is stored with the spout 20 uncapped, the flow path 24 is blocked by the leakage prevention mechanism 21, so it is possible to prevent outside air from entering the container 28 and oxidizing the contents, which could cause deterioration in quality, and it is possible to reduce the risk of foreign matter such as dust and moisture getting into the container 28 and causing bacteria to grow.

Furthermore, typical check valves are attached to the cap of the container and fit inside the cap. Therefore, if there is a problem with the fit, the check valve may fall off into the container. Also, because the check valve is attached to the inside of the cap, it is an internal structure of the cap, making it difficult to check the fit of the check valve from the outside. And to make the fit more secure, it is necessary to attach additional parts to reinforce the fit.

In contrast, in the spout 20, the leakage prevention mechanism 21 is fitted to the spout 20 from the outlet side of the spout 20, so it will not fall off into the container and the fitting state can be easily checked from the outside. Also, by providing a rib 20e (fitting rib) for fixing the leakage prevention mechanism 21, the number of parts can be reduced.

Next, referring to FIG. 7, a container to which the spout 20 is attached will be described. Examples of the container 28 to which the spout 20 is attached include a film container 28 such as a freestanding pouch 28a, a bottle-shaped pouch 28b in which the pouch itself functions as a bottle, and a bag-in-box (BIB) 28c in which a plastic inner container filled with a liquid or the like is housed inside an outer container such as a cardboard case, and the container body is deformable. In the case of these containers 28, the spout 20 is attached to the film by welding or the like. Then, for example, in the case of the standing pouch 28a or the bottle-shaped pouch 28b, the content liquid can be poured out by lifting the container 28 with the overcap open so that the bottom surface of the container 28 is higher than the top surface. In addition, the spout 20 may be attached to a paper pack 28d. In any of the containers, the spout 20 is attached to the pouring portion of each container, as shown by the dotted line, and used.

With reference to FIG. 8, the pressure applied to the central valve body 21c, which is different from the outflow pressure of the liquid contained in the bag-shaped container 28, will be described. A trigger-type dispenser 29a and a lever-type dispenser 29b are illustrated in FIG. 8(a) and (b). These dispensers 29 are usually provided with a dip tube, which sucks up the liquid content and sprays it. In the illustrated dispenser 29, each dispenser is attached to the spout 20 via an overcap. When the user operates the trigger or lever, the air inside the spout 20 is discharged to the outside, the pressure inside the spout 20 decreases, and a negative pressure 26 is created. As a result, pressure due to the negative pressure 26 is applied to the central valve body 21c of the movable valve 21a, and the central valve body 21c moves vertically upward, forming a flow path 24. When the flow path 24 is formed, the negative pressure 26 also acts on the liquid content, which is sucked up toward the spray nozzle of the dispenser 29 and sprayed.

According to this embodiment, a liquid leakage prevention mechanism including a movable valve is provided inside the spout, so liquid leakage can be reliably prevented with a simple configuration.

[Second embodiment]
Next, a spout according to a second embodiment of the present invention will be described with reference to Figures 9 to 12. The spout according to this embodiment differs from the first embodiment in that it has a position restriction portion.

First, the spout 30 will be described with reference to Figures 9 and 10. The spout 30 further includes a position restricting portion 31 (position restricting portion). The position restricting portion 31 is a member that restricts the movable range of the movable valve 21a. The position restricting portion 31 is housed and held in the holder 27. The position restricting portion 31 is disposed on the pouring direction side of the movable valve 21a, that is, it is placed directly above the movable valve 21a inside the spout 20. In other words, in the spout 30, the central valve body 21c is displaced in the pouring direction 22, so the position restricting portion 31 is provided so that the central valve body 21c is displaced within the elastic range of the connection support portion 21d.

As shown in FIG. 10, the position regulating portion 31 is a circular donut-shaped member, and has a cross-shaped regulating arm portion 31a and a circular regulating central portion 31b in the central hole. The regulating arm portion 31a and the regulating central portion 31b are both thick enough to fit within the thickness range of the position regulating portion 31. When the central valve body 21c of the movable valve 21a is displaced and comes into contact with the regulating arm portion 31a and the regulating central portion 31b of the position regulating portion 31, the displacement of the movable valve 21a stops. The liquid content contained in the bag-shaped container passes through the gap formed between the regulating arm portion 31a and the regulating central portion 31b and the donut-shaped position regulating portion 31.

Next, other shapes of the position regulating portion 41 will be described with reference to Figures 10 and 11. The position regulating portion 41 is a circular donut-shaped member similar to the position regulating portion 31. Four regulating arm portions 41a extend radially from the inner peripheral surface of the position regulating portion 41. Compared to the position regulating portion 31 described above, the position regulating portion 41 lacks the central regulating portion 31b. The central valve body 21c of the movable valve 21a stops displacing when it comes into contact with the regulating arm portions 41a.

According to this embodiment, by providing a position restriction portion, the central valve body of the movable valve can be displaced within the elastic range of the connection support portion, so the connection support portion will not break.

[Third embodiment]
Next, a spout according to a third embodiment of the present invention will be described with reference to FIG. 13. The spout 60 according to this embodiment is different from the first and second embodiments in that a leakage prevention mechanism 61 is provided near the outlet of the spout 60. The spout 60 is the spout 20 without the holder 27 shown in FIG. 6, but the leakage prevention mechanism 61 is provided near the outlet of the spout 60. The movable valve 61a is displaced up and down to pour out the liquid content and prevent leakage of the liquid content during refilling. In this way, by arranging the leakage prevention mechanism 61 near the outlet of the spout 60, it is possible to further reduce adhesion of dust and the like to the inner circumferential surface of the spout 60 between the base of the spout 60 and the leakage prevention mechanism 61.

The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above-mentioned embodiments and can be modified as appropriate. The configuration and details of the present invention can be modified in various ways that are understandable to those skilled in the art and are within the scope of the present invention. In addition, spouts that combine the separate features included in each embodiment in any way are also included in the scope of the present invention.

20 spout 20a base 20b male thread 20c tube 20d opening 20e rib 20f protruding portion 20g bottom 20h pouring hole 21 liquid leakage prevention mechanism 21a movable valve 21c central valve body 21d connection support portion 21e peripheral portion 22 pouring direction 23 cap 23a valve body holding member 24 flow path 25 positive pressure 26 negative pressure 27 holder 27a flange portion 27b hook-shaped leg portion 27c protruding portion 27d bottom 27e pouring hole 28 container 28a standing pouch 28b bottle-shaped pouch 28c bag-in-box 28d paper pack 29 dispenser 29a trigger-type dispenser 29b lever-type dispenser 30 spout 31 Position restriction portion 31a Restriction arm portion 31b Restriction center portion 40 Spout 41 Position restriction portion 41a Restriction arm portion 60 Spout 61 Liquid leakage prevention mechanism 61a Movable valve

Claims (6)

A spout that is attached to a container in which a liquid content is stored, forms a flow path for the liquid content, and has a mechanism for preventing leakage of the liquid content,
The liquid leakage prevention mechanism includes:
a movable valve that is displaced in a direction in which the liquid content is poured out in response to an applied pressure to form a flow path for the liquid content;
An annular closing portion is disposed upstream of the movable valve with respect to the pouring direction;
A cylindrical holder that accommodates and holds the movable valve therein;
having
the holder has a flange portion on at least a part of an inner circumferential surface thereof for positioning the movable valve at a predetermined position,
The closing portion closes a gap that is provided when the pressure is not applied to the movable valve and the movable valve is not displaced,
A spout, wherein the applied pressure is a negative pressure applied to the movable valve from outside the spout or a positive pressure applied to the movable valve from inside the container. A spout that is attached to a container in which a liquid content is stored, forms a flow path for the liquid content, and has a mechanism for preventing leakage of the liquid content,
The liquid leakage prevention mechanism includes:
a movable valve that is displaced in a direction in which the liquid content is poured out in response to an applied pressure to form a flow path for the liquid content;
An annular closing portion is disposed upstream of the movable valve with respect to the pouring direction;
having
The movable valve is
a central valve body that is displaced in the pouring direction of the content liquid in response to the pressure;
At least one connection support portion that connects and supports the central valve body and a peripheral portion of the movable valve;
having
The central valve body is displaced within a range of an elastic region of the connection support portion,
A position restriction portion is further provided, the position restriction portion being disposed on the pouring direction side of the movable valve and restricting the displacement of the central valve body.
A cylindrical holder that accommodates and holds the movable valve therein,
the holder has a flange portion on at least a part of an inner circumferential surface thereof for positioning the position restriction portion at a predetermined position,
The closing portion closes a gap that is provided when the pressure is not applied to the movable valve and the movable valve is not displaced,
A spout, wherein the applied pressure is a negative pressure applied to the movable valve from outside the spout or a positive pressure applied to the movable valve from inside the container. The spout according to claim 1 or 2 , wherein the closing portion has a protrusion extending in the pouring direction. 3. The spout of claim 2, wherein the cap has a sealing surface portion that is attached to the spout to seal the spout outlet, and the cap has a valve body holding member that extends downward from an inner surface of the sealing surface portion, and when attached to the spout , restricts movement of the central valve body in the pouring direction. A spouted bag container comprising the spout according to any one of claims 1 to 4 . The spout-equipped bag container according to claim 5 , wherein the bag container is a standing pouch, a bottle-shaped pouch, a bag-in-box or a paper pack.