Spout for pouring

Abstract

To provide a spout for pouring out that can stably pour out contents by simple operation and can be kept clean.SOLUTION: The spout for pouring out is provided with an inner plug body 20 fitted to a fitting cylindrical part 11 of a container in which contents are stored, an outer sleeve 30 externally inserted into the inner plug body 20 movably in an axial direction, and an over cap 50 fitted to the outer sleeve 30. The inner plug body 20 has a pour-out cylindrical part 21 fitted to the fitting cylindrical part 11 and a sealing protruding part 24 provided in the pour-out cylindrical part 21. The outer sleeve 30 has a sleeve main body 31 having a tip opening part 33 in a shape according to the sealing protruding part 24, and a stopper protruding part 32 protruding from an outer peripheral surface of the sleeve main body 31. At an opening position of the tip opening part 33, the over cap 50 can store the sealing protruding part 24 protruding to the outside of the outer sleeve 30. At a closing position and the opening position of the tip opening part, the over cap 50 can be fitted to the outer sleeve 30.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a dispensing spout. [Background technology]

[0002] It has been desired that conventional dispensing spouts be able to stably dispense contents from a refill container into a packaging container (a container to be filled) with a simple operation.Patent Document 1 proposes a dispensing spout in which an outer sleeve having a tip opening is attached to an inner plug, and which is switchable between a closed position in which the tip opening is closed and an open position in which the tip opening is open. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-62906 Summary of the Invention [Problem to be solved by the invention]

[0004] When a container with a dispensing spout attached is not in use, such as during storage or transportation, foreign matter such as dirt and dust may adhere to the dispensing spout. If the contents remain in a container with a dispensing spout attached, the spout may be stored with the container attached. After the contents of a container with a dispensing spout attached have been used up, the spout may be discarded. In either case, the contents may adhere to the spout after being poured out.

[0005] If dirt, dust, or contents attached to the spout come into contact with the human body or other objects, they may become soiled. If the contents are liquids containing non-volatile components, dust may accumulate on the spout, causing discomfort to the user.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dispensing spout that can stably dispense contents with a simple operation and can be maintained clean. [Means for solving the problem]

[0007] A first aspect of the present invention is a spout for dispensing, comprising: an inner stopper attached to a tubular attachment portion of a container for accommodating contents; an outer sleeve fitted onto the inner stopper so as to be axially movable relative to the inner stopper; and an overcap attached to the outer sleeve, wherein the inner stopper has a tubular dispensing portion attached to the tubular attachment portion and a sealing protrusion provided on the tubular dispensing portion, the outer sleeve has a sleeve main body having a tip opening shaped according to the sealing protrusion, and a stopper protrusion protruding from the outer peripheral surface of the sleeve main body, and the axial movement can switch between a closed position in which the sealing protrusion closes the tip opening and an open position in which the tip opening is open, and in the open position, the sealing protrusion protrudes outside the outer sleeve from the tip opening, and the overcap can accommodate the sealing protrusion protruding from the tip opening, and the overcap is attachable to the outer sleeve in the closed position and the open position.

[0008] A second aspect of the present invention is a spout for dispensing according to the first aspect, wherein the overcap has a tubular portion attached to the outer sleeve, a top portion covering the tip opening, and a spacer forming a space between the tip opening and the top portion capable of accommodating the sealing protrusion protruding from the tip opening. A third aspect of the present invention is the second aspect, wherein the spacer is a spout for pouring that extends from the top portion toward the sleeve body.

[0009] A fourth aspect of the present invention is a spout for dispensing, which is any one of the first to third aspects, and in which the outer sleeve further comprises a regulating member that regulates axial movement relative to the inner plug body, the overcap is attached to the sleeve body, and the regulating member is removably provided on the opposite side of the sleeve body via the stopper protrusion. [Effects of the Invention]

[0010] According to the present invention, the contents can be stably dispensed with a simple operation. In addition, since the overcap can accommodate the sealing protrusion protruding from the tip opening, the overcap can be attached to the outer sleeve in the open position as well as the closed position. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view showing an example of a spout base. [Figure 2] FIG. 1 is a perspective view showing an example of an inner plug and an outer sleeve. [Figure 3] FIG. 10 is a perspective view showing an example of an overcap. [Figure 4] FIG. 2 is a vertical cross-sectional view showing an example of a dispensing spout in a closed state. [Figure 5] FIG. 2 is a perspective view showing an example of a spout body in an open state. [Figure 6] FIG. 2 is a vertical cross-sectional view showing an example of a spout body in an open state. [Figure 7] FIG. 1 is a longitudinal cross-sectional view of the dispensing spout with the outer sleeve in an open position. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.

[0013] Fig. 1 shows an embodiment of the spout base, Fig. 2 shows the inner plug and outer sleeve, Fig. 3 shows the overcap, and Fig. 4 shows the dispensing spout in a closed state. Figs. 5 and 6 show the spout body in an open state. Fig. 7 shows the spout body in an open state with the overcap attached.

[0014] As shown in Fig. 2, spout body 40 of the embodiment has at least inner plug body 20 and outer sleeve 30. Spout body 40 can perform the function of dispensing contents by being attached to spout base 10 shown in Fig. 1.

[0015] Furthermore, an overcap 50 shown in Fig. 3 can be attached to the spout body 40. At least the spout body 40 and the overcap 50 constitute the dispensing spout 100 shown in Fig. 4. The dispensing spout 100 may further include a spout base 10.

[0016] As shown in Figure 1, spout base 10 comprises mounting portion 12 that is attached to a container (not shown) that contains the contents, and mounting tubular portion 11 that protrudes from mounting portion 12. Hereinafter, the container that contains the contents may be referred to as the main container. Spout base 10 can be made from, for example, a molded product made of synthetic resin. Spout base 10 can be molded as a single unit, or it may be made by assembling two or more parts.

[0017] The main container is not particularly limited, but may be a pouch container. The pouch container can be opened by opening the gap between two films. The types of pouch containers are not particularly limited, but may be a standing pouch, a three-side sealed bag, a four-side sealed bag, a gusset bag, etc.

[0018] The pouch container may be made of, for example, a flexible film or sheet, which may be made primarily of, for example, synthetic resin, paper, metal foil, or two or more of these materials.

[0019] The attachment portion 12 in the illustrated example has a so-called boat shape that protrudes in two opposing directions from the center portion having the mounting tubular portion 11. The opening of the pouch container is welded around the attachment portion 12 with the two opposing directions aligned with the width direction of the pouch container. This makes it possible to reduce the difference in level between the area where the pouch container is welded without the attachment portion 12 and the area where the pouch container is welded with the attachment portion 12. Although not specifically shown, the attachment portion 12 may be circular, polygonal, etc.

[0020] The cylindrical mounting portion 11 in the illustrated example has a cylindrical shape. A spout 11a of a flow path 17 (see FIG. 4) that penetrates the attachment portion 12 and leads to the main container is opened at the tip of the cylindrical mounting portion 11. The cross-sectional shape of the flow path 17 as viewed from the axial direction of the cylindrical mounting portion 11 is, for example, circular. Although not particularly limited, flange portions 15, 16 may be formed in the intermediate portion between the cylindrical mounting portion 11 and the attachment portion 12.

[0021] The contents of the main container are not particularly limited, but preferably have fluidity that allows them to be poured through flow path 17, and examples thereof include fluids made of tangible substances such as liquids, powders, and granules. Examples of liquid contents include liquid cosmetics, liquid detergents, liquid seasonings, and liquid medicines. Examples of powder or granular, i.e., solid, contents include salt, sugar, pepper, granular seasonings, and powdered detergents.

[0022] Although not specifically shown, spout base 10 may be the neck of a hard container such as a bottle. In this case, attachment portion 12 of spout base 10 may be omitted, and mounting tubular portion 11 and the like may be integrally molded with the body or shoulder of the main container.

[0023] A male thread portion 13 is formed on the outer periphery of the mounting tube portion 11, and is used for mounting the inner plug 20. Furthermore, a locking portion 14 is formed on the side closer to the mounting portion 12 than the male thread portion 13. A restricting member 41, which will be described later, can be locked onto the locking portion 14.

[0024] 2, the inner plug 20 has a pouring tube portion 21 that is attached to the attachment tube portion 11, and a sealing protrusion 24 that is provided on the pouring tube portion 21. In the illustrated example, the pouring tube portion 21 and the sealing protrusion 24 are substantially cylindrical. Because there is no need to rotate the outer sleeve 30 circumferentially relative to the outer periphery of the inner plug 20, the outer shapes of the pouring tube portion 21 and the sealing protrusion 24 may be non-circular, although this is not specifically shown.

[0025] The sealing protrusion 24 is formed to have a smaller diameter than the pouring tube portion 21. An annular top wall portion 22 is formed on the tip side of the pouring tube portion 21. Between the top wall portion 22 and the sealing protrusion 24, a support portion 23 that supports the sealing protrusion 24 and an opening portion 25 that allows the contents to flow are formed at different positions in the circumferential direction.

[0026] 4, a female thread portion 28 that can be coupled to the male thread portion 13 of the mounting tube portion 11 is formed on the inner peripheral surface of the dispensing tube portion 21. The method of coupling the mounting tube portion 11 and the dispensing tube portion 21 is not limited to threads, and various methods can be used. Although not particularly shown, at least one of the outer peripheral surface of the mounting tube portion 11 and the inner peripheral surface of the dispensing tube portion 21 may be formed with irregularities that can be coupled by axial displacement, fitting, engagement, etc.

[0027] A sealing tube portion 29 protrudes from the base end side of the top wall portion 22. The sealing tube portion 29 may be cylindrical, for example. The outer diameter of the sealing tube portion 29 is smaller than the inner diameter of the pouring tube portion 21, so the outer peripheral surface of the sealing tube portion 29 is spaced apart from the inner peripheral surface of the pouring tube portion 21. The tip of the attachment tube portion 11 is inserted between the pouring tube portion 21 and the sealing tube portion 29.

[0028] The length by which the sealing tube portion 29 protrudes from the top wall portion 22 toward the base end may be shorter than the axial length of the pouring tube portion 21. The outer peripheral surface of the sealing tube portion 29 contacts the inner peripheral surface of the mounting tube portion 11, and the base end surface of the top wall portion 22 contacts the tip surface of the mounting tube portion 11, so that the mounting tube portion 11 and the sealing tube portion 29 form an integrated wall surface with respect to the flow path 17. The contents flowing into the flow path 17 can reach the opening on the tip side of the top wall portion 22.

[0029] The sealing protrusion 24 is disposed on the tip side of the pouring tube portion 21 from the top wall portion 22 via the support portion 23. An intermediate wall portion 27 protrudes in a cantilevered manner from the base end side of the sealing protrusion 24. The length of the intermediate wall portion 27 along the axial direction of the flow path 17 may be approximately equal to the distance from the tip surface of the top wall portion 22 to the base end surface of the sealing protrusion 24, or may be shorter than this distance.

[0030] In the illustrated example, the inner plug 20 has openings 25 at two locations in the circumferential direction of the sealing protrusion 24, and the intermediate wall 27 is disposed between these openings 25. This allows the contents traveling in the axial direction of the flow path 17 to collide with the intermediate wall 27 and change their direction of travel toward the openings 25. For example, when the axial direction of the flow path 17 is vertically downward, the contents that collide with the intermediate wall 27 can be guided evenly toward the two openings 25.

[0031] Although not particularly shown, the number of openings 25 formed in the circumferential direction of the sealing protrusion 24 is arbitrary. There may be one opening 25, or three or more openings 25. The intermediate wall portion 27 may be omitted, and the shape of the intermediate wall portion 27 may be changed depending on the position and number of openings 25.

[0032] The inner plug 20 has an annular liquid stop rib 26 on the outer peripheral surface of the tubular pouring portion 21. The liquid stop rib 26 protrudes radially from the outer peripheral surface of the tubular pouring portion 21. The liquid stop rib 26 comes into contact with the inner peripheral surface of the sleeve main body 31, thereby preventing the contents from flowing into the gap between the outer peripheral surface of the tubular pouring portion 21 and the inner peripheral surface of the sleeve main body 31.

[0033] 2 and 4, the outer sleeve 30 has a sleeve body 31 having a tip opening 33 shaped according to the sealing projection 24, and a stopper projection 32 projecting from the outer peripheral surface of the sleeve body 31. The outer sleeve 30 is movable in the axial direction relative to the inner plug 20.

[0034] The tip opening 33 is opened on the tip surface of the sleeve body 31. The tip opening 33 is closed by fitting the sealing protrusion 24. As shown in Fig. 4, the position where the sealing protrusion 24 closes the tip opening 33 is called the closed position. In the closed position, the tip surface of the sealing protrusion 24 may be flush with the tip of the sleeve body.

[0035] When the outer sleeve 30 moves toward the base end of the inner plug 20, the distal opening 33 is opened, as shown in Figures 5 and 6. The position where the sealing protrusion 24 moves away from the distal opening 33 and the distal opening 33 is opened is called the open position. In the open position, the opening 25 of the inner plug 20 protrudes beyond the distal end surface of the sleeve body 31, allowing the contents to flow out from the distal opening 33.

[0036] The outer sleeve 30 is fitted onto the inner plug 20. In the illustrated example, the entire pouring tube portion 21 is housed in the outer sleeve 30, both in the closed position and in the open position. Although not specifically illustrated, only a portion of the pouring tube portion 21 may be housed in the outer sleeve 30.

[0037] In the illustrated example, the sleeve body 31 is cylindrical, and the tip opening 33 is circular. Because there is no need to rotate the outer sleeve 30 circumferentially relative to the outer periphery of the inner plug 20, the sleeve body 31 and the tip opening 33 may be non-circular, although this is not specifically shown.

[0038] The sleeve body 31 in the illustrated example has a step portion 34 on its inner circumferential surface at a position away from the tip opening 33 toward the base end. As shown in Fig. 2, the diameter of the pouring tube portion 21 is larger on the base end side than on the tip end side, and the open position can be restricted by contact with the step portion 34. Although not particularly shown, the open position may be restricted at a position where the top wall portion 22 contacts the periphery of the tip opening 33.

[0039] The stopper protrusion 32 protrudes radially from the outer peripheral surface of the sleeve body 31. The amount by which the stopper protrusion 32 protrudes radially from the outer peripheral surface of the sleeve body 31 varies depending on the circumferential position. The stopper protrusion 32 shown in Fig. 2 has a pair of flange portions 32a, 32a and a pair of cutout portions 32b, 32b.

[0040] The amount by which the notch portion 32b protrudes radially from the sleeve body 31 is smaller than the amount by which the flange portion 32a protrudes radially from the sleeve body 31. Note that the notch portion 32b does not have to protrude radially from the sleeve body 31.

[0041] The outer sleeve 30 has a restricting member 41 on the base end side of the stopper projection 32. The restricting member 41 is disposed on the opposite side of the stopper projection 32 from the sleeve body 31. The restricting member 41 is removable from the outer sleeve 30.

[0042] 4, the restricting member 41 restricts axial movement of the outer sleeve 30 relative to the inner plug 20. Specifically, a protrusion 43 protruding from the inner peripheral surface of the restricting member 41 comes into contact with the locking portion 14 of the spout base 10, thereby restricting movement of the outer sleeve 30.

[0043] The restricting member 41 and the stopper projection 32 are connected, for example, via a plurality of breakable weakened portions 44. The weakened portions 44 are, for example, thin-walled portions, bridges, etc. By breaking the weakened portions 44, the restricting member 41 can be removed from the outer sleeve 30.

[0044] 2, the restricting member 41 is formed in a band shape that goes around in the circumferential direction, and has a grip portion 42 at one end thereof. The grip portion 42 is disposed on one side of the notched portions 32b, 32b of the stopper projection 32. The weakened portion 44 can be broken by pinching and pulling the grip portion 42.

[0045] When the restricting member 41 is removed from the outer sleeve 30, the locking portion 14 is out of contact with the restricting member 41, and the outer sleeve 30 becomes axially movable relative to the inner plug 20. The outer sleeve 30 can be switched between a closed position and an open position by moving in the axial direction. In addition to being switched from the closed position to the open position, the outer sleeve 30 may be switched from the open position to the closed position, and may be capable of repeated switching.

[0046] The overcap 50 is attached to the outer sleeve 30. Not only can the overcap 50 be attached to the outer sleeve 30 in the closed position shown in Fig. 4, but the overcap 50 can also be attached to the outer sleeve 30 with the spout body 40 in the open position shown in Fig. 6. This results in a dispensing spout 100 with the overcap 50 attached while the outer sleeve 30 is in the open position, as shown in Fig. 7.

[0047] The overcap 50 in the illustrated example can be attached to the sleeve main body 31. Although not specifically shown, at least a portion of the overcap 50 may be attached to the stopper protrusion 32. The overcap 50 may be attached to at least a portion of the sleeve main body 31 and at least a portion of the stopper protrusion 32.

[0048] 3, the overcap 50 has a cylindrical tube portion 51 and a top portion 52 that closes the upper end of the tube portion 51. Furthermore, the overcap 50 may have a protrusion 53 at at least one location on the outer circumferential surface of the tube portion 51. The protrusion 53 may be used to prevent slipping when the overcap 50 is removed from the spout body 40.

[0049] The overcap 50 in the illustrated example has a recess 54 at the lower end of the cylindrical portion 51, and the lower end of the protrusion 53 reaches the recess 54. Although not specifically illustrated, the lower end of the protrusion 53 may also reach the lower end of the cylindrical portion 51.

[0050] 4 does not show any gap between the inner peripheral surface of the tubular portion 51 and the outer peripheral surface of the sleeve body 31, but a gap may be provided to prevent the two from coming into close contact with each other. Furthermore, ribs (not shown) may be protruded from the inner peripheral surface of the tubular portion 51 to locally contact the outer peripheral surface of the sleeve body 31 and enable fitting. When ribs are provided on the inner peripheral surface of the tubular portion 51, they may be arranged in one or more locations in the circumferential direction, for example, in two to four locations.

[0051] 7, when the outer sleeve 30 is in the open position, the sealing protrusion 24 protrudes from the tip opening 33 to the outside of the outer sleeve 30. The overcap 50 can accommodate the sealing protrusion 24 protruding from the tip opening 33.

[0052] The top 52 of the overcap 50 is disposed above the tip opening 33 and covers the tip opening 33. A spacer 55 extends from the inner surface of the top 52 toward the sleeve body 31. The spacer 55 forms a space between the tip opening 33 and the top 52 in which the sealing protrusion 24 protruding from the tip opening 33 can be accommodated.

[0053] Although the spacer 55 in the illustrated example is cylindrical, it may have any suitable shape as long as it does not interfere with the sealing protrusion 24. Although not particularly shown, the spacer 55 may be formed on the inner circumferential surface of the tubular portion 51, or may be formed between the inner circumferential surface of the tubular portion 51 and the inner surface of the top portion 52.

[0054] Next, a method for assembling the spout 100 will be described.

[0055] To attach the spout body 40 shown in Figure 2 to the mounting tube portion 11 of the spout base 10 shown in Figure 1, the male thread portion 13 of the spout base 10 and the female thread portion 28 of the inner plug 20 may be joined together. For example, the outer sleeve 30 may be gripped and the spout body 40 may be rotated in a predetermined direction. Because the sealing protrusion 24 of the inner plug 20 is fitted into the tip opening 33 of the outer sleeve 30, the rotational force applied to the outer sleeve 30 is transmitted to the inner plug 20.

[0056] To attach the overcap 50 shown in Fig. 3 to the spout body 40 shown in Fig. 2, the tubular portion 51 is simply attached to the sleeve body 31. This provides the spout 100 shown in Fig. 4.

[0057] The step of joining the main container to the mounting portion 12 of the spout base 10 may be performed before or after the step of attaching the inner stopper 20, outer sleeve 30, and overcap 50 to the mounting cylindrical portion 11 of the spout base 10. After the spout 100 is completed by attaching the inner stopper 20, outer sleeve 30, and overcap 50 to the mounting cylindrical portion 11 of the spout base 10, it may be supplied to the manufacturing process of the main container.

[0058] Next, a method of using the dispensing spout 100 will be described.

[0059] 4, to dispense the contents of a main container (not shown) attached to the spout base 10, the overcap 50 is removed from the spout main body 40. The user then grasps the gripping portion 42 of the restricting member 41 and breaks the weakened portion 44, thereby removing the restricting member 41 from the outer sleeve 30. At this time, the outer sleeve 30 is in the closed position.

[0060] The target container into which the contents of the main container are to be refilled is not specifically shown, but may be, for example, a bottle-shaped container made of synthetic resin. The target container may have, for example, a cylindrical container neck and a container body for accommodating the contents. A container shoulder may be present between the container neck and the container body.

[0061] The inner diameter of the container neck is larger than the outer diameter of the sleeve body 31. This allows at least a portion of the sleeve body 31 to be inserted into the container neck when refilling the contents of the main container. The spout body 40 may be in an inverted position. The inverted position is a position in which the tip opening 33 of the outer sleeve 30 faces vertically downward.

[0062] The inner diameter of the container neck is smaller than the major axis of the flange 32a of the stopper projection 32. This allows the tip surface of the flange 32a to come into contact with the open end of the container neck. Furthermore, it is preferable that the inner diameter of the container neck is larger than the minor axis of the cutout 32b of the stopper projection 32. This allows a gap to be formed between the cutout 32b and the inner peripheral surface of the container neck, allowing air to flow in, when at least a portion of the sleeve body 31 is inserted into the container neck.

[0063] When the contents of the main container are to be refilled, the main container is held in an inverted position and the sleeve body 31 is inserted into the neck of the container to be filled, causing the tip surface of the flange portion 32a to contact the open end of the container neck. From this state, the spout base 10 and the inner plug 20 are pushed axially toward the tip of the container neck and outer sleeve 30, thereby opening the spout body 40. Specifically, as shown in Figures 5 and 6, the sealing protrusion 24 moves away from the tip opening 33, and the outer sleeve 30 is placed in the open position.

[0064] When the tip opening 33 is opened, the contents of the main container pass through the flow path 17 of the spout base 10, through the opening 25 of the inner plug 20, and are released to the outside. The contents are divided into two by the intermediate wall 27, and flow from the opening 25 into the container to be filled.

[0065] After the desired amount of contents has been poured into the container to be filled, the spout body 40 is removed from the container to be filled, and the main container is returned from the inverted position to its original position, thereby completing the dispensing of the contents. If the amount of contents in the main container is within the capacity of the main container, the main container may be kept in the inverted position until the dispensing of the contents is completed.

[0066] 7, even when the outer sleeve 30 is in the open position and the sealing protrusion 24 protrudes outside the outer sleeve 30, the overcap 50 can accommodate the sealing protrusion 24. When the main container is discarded with the spout body 40 still attached, the overcap 50 can be left attached. This makes it possible to prevent leakage of contents remaining inside or adhering to the main container, spout body 40, etc.

[0067] According to the spout 100 of this embodiment, the overcap 50 can be attached before or after opening the spout body 40. This makes it possible to prevent dirt such as dust from adhering to the outer surface of the spout body 40 before opening the main container. Furthermore, by attaching the overcap 50 to the spout body 40 after opening the main container, it is possible to prevent the overcap 50 from being lost from the main container.

[0068] By the simple operation of pushing the inner plug 20 down against the outer sleeve 30, the inner plug 20 and the outer sleeve 30 move relative to each other in the axial direction, opening the tip opening 33 and transferring the contents of the main container into the container to be filled.

[0069] The spout body 40 is structured so that the tip opening 33 does not open until the inner plug 20 and the outer sleeve 30 move relative to each other, even when in an inverted position. This reduces the risk of spilling the contents until the outer sleeve 30 is inserted into the neck of the container. Therefore, the spout body 40 allows for stable pouring of the contents from the main container into the container to be filled with a simple operation.

[0070] In the dispensing spout 100, a general-purpose spout can be used as the spout base 10. This reduces manufacturing costs. Because the inner plug 20 is housed in the outer sleeve 30, the axial dimension is reduced, allowing the spout body 40 to be made smaller.

[0071] In the spout body 40 of this embodiment, the outer peripheral surface of the sleeve body 31 is a smoothly curved surface. Specifically, no irregularities such as ribs or knurling are formed on the outer peripheral surface of the sleeve body 31. This prevents erroneous operations such as rotating the outer sleeve 30 when refilling the contents of the main container, and guides the action of pushing the stopper protrusion 32 toward the container to be filled.

[0072] In addition, in the embodiment, even if one tries to rotate the outer sleeve 30 around the outer periphery of the inner plug 20, the sealing protrusion 24 of the inner plug 20 is fitted into the tip opening 33 of the outer sleeve 30, making it difficult to rotate with a weak force.

[0073] Furthermore, since a strong force is required for the sealing projection 24 to fit into the tip opening 33, it may be difficult to close the spout by moving the outer sleeve 30 relatively toward the tip of the inner plug 20 after the contents have been poured into the container to be filled. Since the overcap 50 can be attached while the spout body 40 is left in an open state, there is no need to return the spout body 40 to a closed state after pouring.

[0074] The present invention has been described above based on preferred embodiments, but the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present invention.

[0075] The components of the spout 100, namely the inner plug 20, the outer sleeve 30, and the overcap 50, can be made from, for example, molded synthetic resins. The restricting member 41, which will be described later, can also be molded integrally with the outer sleeve 30. The components of the spout 100 may be made from the same type of synthetic resin (single material). Furthermore, the spout base 10 may be made from the same type of synthetic resin as the spout 100.

[0076] The synthetic resin is not particularly limited, but may be an inexpensive, general-purpose plastic such as polyethylene, polypropylene, polyolefin, etc. The synthetic resin may include bioplastic, biomass plastic, regenerated plastic, recycled plastic, etc. [Explanation of symbols]

[0077] 10...Spout base portion, 11...Attachment tube portion, 11a...Pouring outlet, 12...Mounting portion, 13...Male thread portion, 14...Latching portion, 15, 16...Flange portion, 17...Flow path, 20...Inner plug body, 21...Pouring tube portion, 22...Top wall portion, 23...Support portion, 24...Sealing protrusion portion, 25...Opening portion, 26...Liquid stopping rib, 27...Intermediate wall portion, 28...Female thread portion, 29...Sealing tube portion, 30...Outer sleeve , 31...sleeve body, 32...stopper protrusion, 32a...flange portion, 32b...cutout portion, 33...tip opening, 34...step portion, 40...spout body, 41...regulating member, 42...gripping portion, 43...protrusion portion, 44...weakened portion, 50...overcap, 51...tubular portion, 52...top portion, 53...convex portion, 54...concave portion, 55...spacer, 100...pouring spout.

Claims

1. an inner plug attached to a cylindrical attachment portion of a container in which contents are accommodated; an outer sleeve fitted onto the inner plug so as to be axially movable; an overcap attached to the outer sleeve; the inner plug has a cylindrical pouring portion attached to the cylindrical mounting portion and a sealing protrusion provided on the cylindrical pouring portion, the outer sleeve has a sleeve body having a tip opening shaped according to the sealing protrusion, and a stopper protrusion protruding from an outer peripheral surface of the sleeve body, and is switchable between a closed position in which the sealing protrusion closes the tip opening and an open position in which the tip opening is open by movement in the axial direction, In the open position, the sealing protrusion protrudes from the tip opening to the outside of the outer sleeve, and the overcap can accommodate the sealing protrusion protruding from the tip opening; The dispensing spout, wherein the overcap is attachable to the outer sleeve in the closed position and the open position.

2. 2. The spout according to claim 1, wherein the overcap has a tubular portion attached to the outer sleeve, a top portion covering the tip opening, and a spacer forming a space between the tip opening and the top portion capable of accommodating the sealing protrusion protruding from the tip opening.

3. The spout of claim 2 , wherein the spacer extends from the top portion toward the sleeve body.

4. The outer sleeve further includes a restricting member that restricts axial movement of the outer sleeve relative to the inner plug. The overcap is attached to the sleeve body, The spout according to any one of claims 1 to 3, wherein the restricting member is removably provided on the opposite side of the sleeve body via the stopper projection.

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