JP2022094484A - Spout and bag container with spout - Google Patents

Abstract

To prevent content fluid from leaking when refilling the content fluid.SOLUTION: A spout is mounted on a container storing content fluid, which has a flow passage for the content fluid formed therein and comprises a fluid leakage preventing mechanism for the content fluid. The fluid leakage preventing mechanism has: a movable valve that is displaced in a pouring-out direction of content fluid in response to pressure applied thereto to form a flow passage for the content fluid; and an annular closing part arranged at an upstream side in the pouring-out direction of the movable valve. The closing part closes a clearance formed in a state where the pressure is not applied to the movable valve and therefore the valve is not displaced, where the applied pressure is negative pressure that is applied to the movable valve from the outside of the spout or positive pressure that is applied to the movable valve from the inside of the container.SELECTED DRAWING: Figure 1

Description

The present invention relates to a spout, and more particularly to a spout having a liquid leakage prevention mechanism for the content liquid.

In the above technical field, Patent Document 1 states that when the contents are poured from the packaging bag to the container, the contents are displaced only in the pouring direction of the contents in order to prevent the contents from vigorously popping out from the tilted packaging bag. A flow path forming member (spout) with a possible movable valve (check valve) is disclosed.

Japanese Unexamined Patent Publication No. 2018-131243

In the spout described in Patent Document 1, the content liquid flows out from the moment the bag container is lifted and tilted in order to fill the refill container with the content liquid. Therefore, if the bag container cannot be moved properly, the refillable container may be contaminated with the content liquid. Further, even when the user strongly grips the body of the bag container, the content liquid overflows from the bag container, and there is a possibility that the surroundings are similarly contaminated.

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

The present invention is a spout that is attached to a container in which a content liquid is housed, forms a flow path for the content liquid, and has a liquid leakage prevention mechanism for the content liquid, wherein the liquid leakage prevention mechanism is a pressure applied. A movable valve that is displaced in the pouring direction of the content liquid according to the above to form a flow path of the content liquid, and is arranged on the upstream side of the movable valve in the pouring direction with respect to the pouring direction. It has an annular closed portion, and the closed portion closes the gap provided in a state where the pressure is not applied to the movable valve and is not displaced, and the applied pressure is applied. The present invention relates to a spout, which is a negative pressure applied to the movable valve from the outside of the spout or a positive pressure applied to the movable valve from the inside of the container.

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

According to the spout of the present invention, it is possible to prevent liquid leakage when refilling the content liquid. Further, according to the spout of the present invention, the spout attached to the inner container can be easily and accurately aligned with the locking portion for locking the spout provided in the outer container.

It is (a) the sectional view before forming a channel, and (b) the sectional view after forming a channel of the spout which concerns on 1st Embodiment of this invention. It is (a) perspective view, (b) top view, (c) side view, (d) bottom view of the spout which concerns on 1st Embodiment of this invention. It is (a) perspective view, (b) top view, (c) side view, (d) AA sectional view, (e) bottom view of the holder of the spout which concerns on 1st Embodiment of this invention. (A) A perspective view of the movable valve of the spout according to the first embodiment of the present invention, (b) bottom view, (c) side view, (d) AA sectional view, (e) top surface. It is a figure. It is (a) perspective view and (b) side view of the cap part of the spout which concerns on 1st Embodiment of this invention. It is (a) the sectional view before forming a channel, and (b) the sectional view after forming a channel of the spout which concerns on 1st Embodiment of this invention. It is (a)-(d) perspective view which shows an example of the container to which the spout which concerns on 1st Embodiment of this invention is attached. It is (a)-(b) side view which shows an example of the pouring part which can be attached to the spout which concerns on 1st Embodiment of this invention. It is (a) the sectional view before forming a channel, and (b) the sectional view after forming a channel of the spout which concerns on 2nd Embodiment of this invention. It is (a) perspective view, (b) side view, (c) top view of the position regulation part of the spout which concerns on 2nd Embodiment of this invention. It is (a) the sectional view before forming a channel, and (b) the sectional view after forming a channel of the spout which concerns on 2nd Embodiment of this invention. It is (a) perspective view, (b) side view, (c) top view, (d) bottom view of the position regulation part of the spout which concerns on 2nd Embodiment of this invention. It is sectional drawing before forming the flow path of the spout which concerns on 3rd Embodiment of this invention.

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

Further, a male screw portion 20b is provided on the outer peripheral surface of the spout 20, and the female screw portion provided on the inner peripheral surface of the overcap or the cap 23 meshes with the male screw portion 20b to cover the spout 20. Will be done. That is, the overcap and the cap 23 are members that are screwed to the spout 20 and have a sealing surface portion that is in close contact with the spout 20 and seals the spout 20 in order to open or close the spout. It is a member used. When using the content liquid contained in the container, remove the overcap and the cap 23 and pour out the content liquid. When the pouring of the content liquid is completed, the overcap is closed to close the spout 20 spout.

The spout 20 has a liquid leakage prevention mechanism 21. That is, the spout 20 has a mechanism for preventing liquid leakage on the flow path of the content liquid contained in the bag-shaped container. The liquid leakage prevention mechanism 21 is arranged on the movable valve 21a that is displaced in the pouring direction of the content liquid according to the applied pressure to form a flow path of the content liquid and on the upstream side of the movable valve 21a in the pouring direction. It has a bottom portion 27d (closed portion) to be mounted.

The movable valve 21a is housed inside the holder 27. The holder 27 is a tubular (annular) member having a top surface portion (open top plate portion) open and a circular hole portion through which a part of the bottom surface portion penetrates (see FIG. 3 and the like). The movable valve 21a is placed on the inner bottom surface portion inside the holder 27.

Further, the holder 27 has a flange portion 27a for positioning the movable valve 21a at a predetermined position on at least a part of the inner peripheral surface. The flange portion 27a is provided on the discharge direction side with respect to the movable valve 21a, thereby restricting the liquid leakage prevention mechanism 21 from moving to the discharge direction side. The flange portion 27a is a protruding portion protruding from the surface of the inner peripheral surface of the holder 27 in the radial direction of the holder 27, and is a raised portion having an arch shape (a part of an arc) in a cross-sectional view. be. The flange portion 27a is provided at a height position corresponding to the thickness of the movable valve 21a from the bottom surface portion 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 a gap. 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 arranged directly below the flange portion 27a. By arranging it directly under the flange portion 27a, the movable valve 21a may move inside the holder 27 even if vibration or the like is applied to the spout 20 or the spout 20 is turned upside down. The position will not shift. That is, when the movable valve 21a tries to move inside the holder 27, it is caught by the flange portion 27a and the movement of the movable valve 21a is restricted.

Next, as shown in FIGS. 1 and 3, the holder 27 has a bottom portion 27d (closed portion) having a pouring hole 27e for pouring out the content liquid. Further, the bottom portion 27d has a convex portion 27c (convex portion) extending in the pouring direction 22 along the edge portion of the pouring hole 27e. The injection hole 27e is a circular hole when viewed from the upper surface. The convex portion 27c is a member provided along the edge of the pouring hole 27e, and is an annular member when viewed from the upper surface, and is a member having an annular shape when viewed from the side surface, and the pouring direction 22 from the upper surface of the bottom portion 27d. It is a protruding part that protrudes toward (upward). Then, in a state where 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 to the convex portion 27c of the bottom portion 27d, and is between the central valve body 21c and the peripheral portion 21e. Since the gap formed is closed by the bottom portion 27d, the flow path 24 can be closed. Therefore, the flow path 24 can be closed even when the spout 20 is not covered. Further, the holder 27 has a claw leg portion 27b. The claw leg portion 27b is an elongated rod-shaped member protruding from the outer bottom surface portion of the holder 27 toward the outside of the holder 27, and the key is located at the tip portion on the opposite side (vertically downward) from the bottom surface portion of the holder 27. It is a member provided with claws. Then, when the holder 27 is inserted into the hole provided in the bottom surface portion of the spout 20, the key claw portion of the key claw leg portion 27b is locked so as to be hooked on the outer bottom surface portion of the base portion 20a of the spout 20. The holder 27 is fixed inside the spout 20. In this way, when the key claw leg portion 27b is locked to the spout 20, the key claw resists the force of pulling the holder 27 in the pouring direction 22, so that the holder 27 does not come off from the spout 20. It has become like. Although three key claw leg portions 27b are provided here at equal intervals on the outer bottom surface portion, the number of key claw leg portions 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 a circular member arranged in the central portion of the circular movable valve 21a and surrounded by the peripheral edge portion 21e, and is thinner than the peripheral edge portion 21e. Further, the peripheral edge portion 21e is a member having an annular shape. 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. When the central valve body 21c is displaced, the flow path 24 of the content liquid is formed as shown in FIG. 1 (b). The central valve body 21c and the peripheral edge portion 21e are connected by a connection support portion 21d described later, but a gap is formed between the central valve body 21c and the peripheral edge portion 21e (see FIG. 4). This gap is closed by the bottom portion 27d having the convex portion 27c when the central valve body 21c is not displaced (see FIG. 1 and the like). That is, the bottom portion 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 the outside of the spout 20 or a positive pressure 25 applied to the central valve body 21c from the inside of the bag-shaped container. Is. 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 (lifting force). For example, the pressure applied to the central valve body 21c by attaching an exhaust device to the spout 20 and exhausting or sucking air in the space between the spout 20 and the movable valve 21a. Further, the positive pressure 25 applied to the central valve body 21c is, for example, the outflow pressure which is the pressure applied when the content liquid contained in the bag-shaped container flows out to the outside, and is the central valve from below in the vertical direction. It is a force that pushes the body 21c upward.

The central valve body 21c is connected to the peripheral edge portion 21e of the movable valve 21a by three connection support portions 21d (see FIG. 4 and the like). The connection support portion 21d is an elongated and thin rod-shaped member, and has a Z-shape. The connection support portion 21d is connected to the central valve body 21c and the peripheral edge portion 21e by connecting one end to the central valve body 21c and the other end to the peripheral edge 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. Due to the displacement of the central valve body 21c, a flow path 24 through which the content liquid flows is formed between the central valve body 21c and the peripheral portion 21e. That is, a connection support portion 21d is provided between the central valve body 21c and the peripheral edge portion 21e, but a gap is formed in the portion where the connection support portion 21d does not exist, and the flow path is formed by this gap. Part of 24 is formed.

The connection support portion 21d is a member (flexible member) having an elastic function, and is a straight line extending from one end of the arc and the arc toward the peripheral edge portion 21e and from the other end of the arc toward the central valve body 21c. It has a shape that is combined with an extended straight line. In this way, of the connection support portion 21d, the portion connected to the peripheral edge portion 21e (straight line portion on one end side) and the portion connected to the central valve body 21c (straight line portion on the other end side) are arranged separately. By doing so, the displacement amount of the connection support portion 21d as a whole can be increased. The shape of the connection support portion 21d is not limited to the shape shown here, and any shape can be used as long as the central valve body 21c and the peripheral edge portion 21e can be connected and the central valve body 21c can be supported. You may. For example, it may have a shape consisting of four straight lines extending from each of the positions where the peripheral edge portion 21e is divided into four equal parts toward the center of the central valve body 21c. The central valve body 21c is displaced within the elastic region of the connection support portion 21d. When the connection support portion 21d is displaced by applying pressure to the central valve body 21c, the connection support portion 21d elastically deforms in a form of being dragged by the displacement of the central valve body 21c, and while supporting the central valve body 21c, the central valve body 21c Limit the range of motion. When the pressure applied to the central valve body 21c is removed, the central valve body 21c returns to its original position due to the elastic force of the connection support portion 21d. That is, the central valve body 21c moves in the direction opposite to the pouring direction 22, and finally returns to the original position. Here, from the viewpoint of the displacement amount (range of motion) of the central valve body 21c, the shape of the connection support portion 21d may be a combination of the arc and the two straight lines shown in FIG. 4 to increase the displacement amount. It is advantageous because it can be done.

When the central valve body 21c is displaced beyond the range of the elastic region of the connection support portion 21d, that is, beyond the elastic limit, the connection support portion 21d is broken. Even if the central valve body 21c, the connection support portion 21d and the peripheral portion 21e are all made of the same material, the connection support portion 21d is formed of an elastic member, and the central valve body 21c and the peripheral portion 21e are other. It may be formed of a member.

Next, referring to FIG. 5, a female screw is cut on the inner peripheral surface of the cap 23, and the cap 23 can be attached to and detached from the spout 20 by the female screw and the male screw portion 20b. .. In the cap 23, a valve body holding member 23a, which is an elongated rod-shaped member, extends downward from the inner surface of the sealing surface portion. The tip portion of the valve body holding member 23a on the side opposite to the sealing surface portion protrudes from the bottom surface portion of the cap 23. That is, the value of the length of the valve body holding member 23a is at least larger than the value of the thickness width in the vertical direction of the cap 23.

Then, in a state where the cap 23 is attached to the spout 20 (FIG. 1A), the valve body holding member 23a is arranged at a position where a slight gap is left from the central valve body 21c of the movable valve 21a. , May be in contact. In this state, the movable valve 21a comes into contact with the valve body holding member 23a from above in the vertical direction and the convex portion 27c of the holder 27 from below in the vertical direction, so that the movable valve 21a moves in either the vertical direction. I can't.

Further, the convex portion 27c supports the central valve body 21c of the movable valve 21a so as to be slightly lifted from the lower side (the central valve body 21c is pushed up slightly to the downstream side) in a state where the movable valve 21a is not displaced. As a result, a force for pressing the movable valve 21a downward (a force for pressing the movable valve 21a to the opposite side in the pouring direction) is generated. A plurality of grooves are also carved on the outer peripheral surface of the cap 23, which serves as a non-slip when the user removes or attaches the cap 23.

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

Then, in a state where pressure is not applied to the movable valve 21a and is not displaced, the liquid leakage prevention mechanism 21 is in a state of being fitted with the convex portion 20f, and the flow path 24 is formed by the bottom portion 20g. Therefore, the gap provided in the liquid leakage prevention mechanism 21 is closed. 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 a part of the flow path 24 of the content liquid. become. That is, since the gap of the liquid leakage prevention mechanism 21 exists regardless of the presence or absence of displacement of the movable valve 21a, if the movable valve 21a is not displaced and the gap is not closed, liquid leakage is prevented. Can not. Therefore, the bottom portion 20g having the convex portion 20f functions as a gap closing portion that closes the gap. Therefore, since the gap can be closed even when the movable valve 21a is not displaced, the content liquid does not leak even when the spout 20 is not covered.

In this way, the gap (flow path 24) is closed by the bottom portion 20g having the convex portion 20f. Therefore, for example, the container 28 is laid on its side, that is, the opening of the spout 20 faces in the horizontal direction. Even in a situation where the container 28 is allowed to stand still, the content liquid does not flow out. In this way, even if the container 28 is laid on its side, the insertion part of the washing machine cartridge is turned sideways, or the user accidentally puts it sideways due to space limitations during storage of the container 28, the contents are included. The liquid does not flow out.

Further, even when the container 28 is stored in a state where the spout 20 is not covered, the flow path 24 is blocked by the liquid leakage prevention mechanism 21, so that the outside air is allowed to enter the container 28. It is possible to prevent the content liquid from being oxidized due to invasion and deteriorating the quality, or it is possible to reduce the risk that foreign matter such as dust and water are mixed in the container 28 and the bacteria are generated.

Further, in a general check valve, it is attached to the cap of the container and fitted inside the cap. Therefore, if there is a defect in the fitting state, the check valve may fall out in the container. Further, since the check valve is attached to the inside of the cap, it has an internal structure of the cap, and it is difficult to check the fitted state of the check valve from the outside. Then, in order to make the fitting state more reliable, it is necessary to attach additional parts for fitting reinforcement.

On the other hand, in the spout 20, since the liquid leakage prevention mechanism 21 fits the spout 20 into the spout 20 from the spout side, it does not fall into the container and is in a fitted state from the outside. Can be easily confirmed. Further, by providing the rib 20e (fitting rib) for fixing the liquid leakage prevention mechanism 21, the number of parts can be reduced.

Next, with reference to FIG. 7, the container to which the spout 20 is attached will be described. As an example of the container 28 to which the spout 20 is attached, a self-standing standing pouch 28a, a bottle-shaped pouch 28b in which the pouch itself functions as a bottle, and a plastic interior filled with liquid or the like inside an outer container such as a cardboard case. There is a container 28 such as a bag-in-box (BIB) 28c for accommodating and using a container in which the body of the container can be deformed. 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, when the container 28 is lifted with the overcap open so that the bottom surface portion of the container 28 is at a position higher than the top surface portion, the content liquid is released. Can be poured. In addition to this, the spout 20 may be attached to the paper pack 28d. In each container, the spout 20 is attached to and used at the pouring portion of each container as shown by the dotted line.

With reference to FIG. 8, the pressure applied to the central valve body 21c, which is different from the outflow pressure of the content liquid contained in the bag-shaped container 28, will be described. 8 (a) and 8 (b) show a trigger type dispenser 29a and a lever type dispenser 29b. A dip tube is usually provided in these dispensers 29, and the content liquid is sucked up by the dip tube and the content liquid is sprayed. In the illustrated dispenser 29, each dispenser is attached to the spout 20 via an overcap. Then, when the user operates the trigger or the lever, the air inside the spout 20 is discharged to the outside, the pressure inside the spout 20 is reduced, and the negative pressure 26 is reached. As a result, a 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 upward in the vertical direction, so that the flow path 24 is formed. When the flow path 24 is formed, the negative pressure 26 also acts on the content liquid, which is sucked up toward the spray port of the dispenser 29 and sprayed.

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

[Second Embodiment]
Next, the spout according to the second embodiment of the present invention will be described with reference to FIGS. 9 to 12. The spout according to the present embodiment is different from the first embodiment in that it has a position regulating unit.

First, the spout 30 will be described with reference to FIGS. 9 and 10. The spout 30 further has a position regulating unit 31 (position regulating unit). The position regulating unit 31 is a member that regulates the movable range of the movable valve 21a. Further, the position regulating unit 31 is housed and held in the holder 27. The position limiting unit 31 is arranged on the pouring direction side of the movable valve 21a, that is, inside the spout 20 and directly above the movable valve 21a. That is, in the spout 30, since the central valve body 21c is displaced toward the pouring direction 22, the position regulating unit 31 is displaced so that the central valve body 21c is displaced within the elastic region of the connection support portion 21d. It is provided.

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 a central perforated portion. .. Both the regulation arm portion 31a and the regulation center portion 31b have a thickness within the range of the thickness of the position regulation portion 31. Then, when the central valve body 21c of the movable valve 21a is displaced and the central valve body 21c comes into contact with the regulating arm portion 31a of the position regulating portion 31 and the regulating central portion 31b, the displacement of the movable valve 21a is stopped. The content liquid contained in the bag-shaped container passes through the gap formed between the regulation arm portion 31a and the regulation center portion 31b and the donut-shaped position regulation portion 31.

Next, other shapes of the position restricting unit 41 will be described with reference to FIGS. 10 and 11. The position regulating unit 41 is a circular donut-shaped member like the position regulating unit 31. The four restricting arm portions 41a extend in the radial direction from the inner peripheral surface of the position restricting portion 41. Compared with the position regulation unit 31 described above, the position regulation unit 41 has a shape lacking the regulation center portion 31b. When the central valve body 21c of the movable valve 21a comes into contact with the regulation arm portion 41a, the displacement stops.

According to the present embodiment, by providing the position restricting portion, the central valve body of the movable valve can be displaced within the elastic region of the connecting support portion, so that the connecting support portion is not broken.

[Third Embodiment]
Next, the spout according to the third embodiment of the present invention will be described with reference to FIG. The spout 60 according to the present embodiment is different from the first embodiment and the second embodiment in that the liquid leakage prevention mechanism 61 is provided near the outlet of the spout 60. The spout 60 is a spout 20 having no holder 27 shown in FIG. 6, in which a liquid leakage prevention mechanism 61 is provided near the outlet of the spout 60. By displacing the movable valve 61a up and down, it is possible to pour out the content liquid and prevent the content liquid from leaking at the time of refilling. By arranging the liquid leakage prevention mechanism 61 near the outlet of the spout 60 in this way, the adhesion of dust and the like from the base of the spout 60 to the inner peripheral surface of the spout 60 between the liquid leakage prevention mechanism 61 is further reduced. It becomes possible to do.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above-described embodiments and can be appropriately modified. Various modifications that can be understood by those skilled in the art can be made to the structure and details of the present invention within the scope of the present invention. In addition, spouts in which different features contained in each embodiment are combined are also included in the scope of the present invention.

20 Dispenser 20a Base 20b Male thread 20c Cylinder 20d Opening 20e Rib 20f Convex 20g Bottom 20h Dispenser hole 21 Liquid leakage prevention mechanism 21a Movable valve 21c Central valve body 21d Connection support 21e Peripheral part 22 Dispensing direction 23 23a Dispenser 24 Flow path 25 Positive pressure 26 Negative pressure 27 Holder 27a Flange 27b Key claw leg 27c Convex 27d Bottom 27e Dispenser hole 28 Container 28a Standing pouch 28b Bottle shape pouch 28c Bag-in-box 28d Paper pack 29 Dispenser 29a Trigger type dispenser 29b Lever type dispenser 30 Spout 31 Position regulation part 31a Restriction arm part 31b Restriction center part 40 Spout 41 Position regulation part 41a Restriction arm part 60 Spout 61 Liquid leakage prevention mechanism 61a Movable valve

Claims (9)

A spout that is attached to a container that houses the content liquid, forms a flow path for the content liquid, and has a liquid leakage prevention mechanism for the content liquid.
The liquid leakage prevention mechanism is
A movable valve that is displaced in the pouring direction of the content liquid according to the applied pressure to form a flow path of the content liquid,
An annular closed portion arranged on the upstream side of the movable valve in the pouring direction with respect to the pouring direction.
Have,
The closing portion closes the gap provided in a state where the pressure is not applied to the movable valve and the valve is not displaced.
The pressure applied is a negative pressure applied to the movable valve from the outside of the spout or a positive pressure applied to the movable valve from the inside of the container. The spout according to claim 1, wherein the closed portion has a convex portion extending in the pouring direction side. The movable valve is
A central valve body that displaces the content liquid in the pouring direction according to the pressure, and
At least one connection support portion that connects and supports the central valve body and the peripheral portion of the movable valve, and
Have,
The spout according to claim 1 or 2, wherein the central valve body is displaced within the elastic region of the connection support. The spout according to claim 3, further comprising a position regulating portion that is arranged on the pouring direction side of the movable valve and regulates the displacement of the central valve body. A cap that is attached to the spout and has a sealing surface portion that seals the spout outlet, and has a valve body holding member that extends downward from the inner surface of the sealing surface portion, and the spout. The spout according to claim 3 or 4, which restricts the movement of the central valve body in the pouring direction when mounted on the spout. The spout according to any one of claims 1 to 5, which has a cylindrical holder for accommodating and holding the movable valve inside. The spout according to claim 6, wherein the holder has a flange portion for positioning the movable valve or the position restricting portion at a predetermined position on at least a part of an inner peripheral surface. A bag container with a spout provided with the spout according to any one of claims 1 to 7. The bag container with a spout according to claim 8, wherein the bag container is a standing pouch, a bottle-shaped pouch, a bag-in-box, or a paper pack.

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