JP2013249136A - Spout stopper with check valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spout stopper which has a check valve free from product failure such as deformation generated in a welding process, and has a valve body reliably opened and closed in use.SOLUTION: A spout stopper A with a check valve C is welded to an opening of a bag-shaped container. The spout stopper A has a spout cylinder 1 and a welded portion 2 formed under the spout cylinder 1, the spout stopper 1 has the check valve C including a valve seat cylinder 3 held inside the welded portion 2, and a valve body 4 provided at an upper surface 32a of the valve seat cylinder 3, and the valve seat cylinder 3 is formed separated from the valve body 4, and is held to form a gap E between the upper surface 32a of an outer peripheral wall 31 and an inner peripheral surface 12a, 2a of the spout cylinder 1.

Description

  The present invention relates to a spout used by welding to a bag-like container, and more particularly to a spout with a check valve provided with a check valve inside the spout.

  In recent years, in a spout attached to a bag-like container containing liquid or the like, air can be prevented from flowing into the container when the contents are poured out, and the freshness of the contents can be maintained over a long period of time. Various high-performance packaging materials that can be developed have been developed. And as a conventional pouring plug with a check valve, a check valve in which the valve cylinder and the valve body are integrally formed of the same material is fitted into the pouring tube, and a welded portion is provided below the pouring tube. A pouring tap in which is formed is known (see, for example, Patent Document 1).

JP 2006-69594 A

  Normally, such a spout is attached by welding to the opening end of the bag-like container with the check valve fitted to the spout tube. The heated check valve is heated and the opening part is welded or deformed, and the valve body does not function well during use, the liquid content is poorly poured, the liquid content is poorly returned after pouring, the outside air There was a problem that backflow of the water easily occurred. Further, the problem of welding between the valve body and the valve seat cylinder appears more remarkably when the valve body and the valve seat cylinder are integrally formed of the same material.

  Accordingly, an object of the present invention is to provide a spout plug that can reliably open and close the valve body during use without causing a product defect in which the check valve is deformed during the welding process.

  The present invention is a pouring stopper with a check valve welded to the opening of a bag-like container, the pouring tap having a pouring tube and a welding portion formed below the pouring tube, Inside the spout, there is a check valve consisting of a valve seat tube held on the inner side of the welded portion and a valve body provided on the upper surface of the valve seat tube, The check body is formed separately from the valve body and is held so as to form a gap between the upper surface side of the outer peripheral wall and the inner peripheral surface of the dispensing cylinder. It is a pouring tap with a valve.

  In the invention, it is preferable that the valve body is a plate-like member having an outer peripheral edge portion and a movable portion provided inward from the outer peripheral edge portion via a hinge. It is. Further, according to the present invention, the dispensing cylinder has a large-diameter cylinder portion on the proximal end side and a small-diameter cylinder portion on the distal end side, and the upper surface of the valve seat cylinder is inward of the large-diameter cylinder portion of the dispensing cylinder It is the pouring tap with a check valve characterized by being located in.

  Further, according to the present invention, the dispensing cylinder has a ring portion that hangs down from an inner surface at a stepped portion connecting the large diameter cylindrical portion and the small diameter cylindrical portion, and the valve body is an upper surface of the valve seat cylinder. A pouring tap with a check valve, which is held between the valve body mounting surface formed on the ring and the ring portion. Further, the present invention is the pouring tap with a check valve, wherein the outer peripheral wall of the valve seat cylinder is tapered. Further, the present invention is the pouring tap with a check valve, characterized in that the upper surface of the valve seat tube is roughened on the contact surface with the movable part of the valve body. Further, the present invention is the pouring tap with a check valve, characterized in that a liquid reservoir is formed on the upper surface of the valve seat tube at a portion in contact with the movable part of the valve body. . Moreover, this invention is the pouring tap with a non-return valve characterized by the said liquid reservoir part being a concave groove. The present invention is the pouring tap with a check valve, wherein the concave groove is formed continuously or intermittently in the circumferential direction. Moreover, the present invention is the pouring tap with a check valve, characterized in that the concave groove is roughened. Further, the present invention is the pouring tap with a check valve, wherein the concave groove is formed with a depth of 0.2 mm to 0.5 mm.

  In the present invention, the valve seat cylinder and the valve body constituting the check valve are formed separately, and a gap is formed between the upper side of the outer peripheral wall of the valve seat cylinder and the inner peripheral surface of the extraction cylinder. Since the check valve is heated during the welding process, there is no product defect that is deformed or the like, and the valve body can be reliably opened and closed during use.

It is sectional drawing which shows 1st Embodiment of this invention, (A) is a figure before opening and (B) is a figure which shows the mode at the time of extraction. It is a top view which shows the valve body of this invention. It is sectional drawing which shows 2nd Embodiment of this invention, (A) is a figure before opening and (B) is a figure which shows the mode at the time of extraction. It is sectional drawing which shows 3rd Embodiment of this invention, (A) is a figure before opening, (B) is a figure which shows the mode at the time of extraction. It is a principal part enlarged view of FIG. 4 (A). It is sectional drawing which shows 4th and 5th embodiment of this invention, (A) is a figure before opening and (B) is a figure which shows the mode at the time of extraction. It is an enlarged plan view which shows the valve seat cylinder of this invention, (A) is a valve seat cylinder of 4th Embodiment, (B) is a figure which shows the valve seat cylinder of 5th Embodiment.

  A first embodiment of the present invention will be described with reference to FIGS. The spout A includes a plug body B and a check valve C. An outer lid D can be attached to the spout A. In the present embodiment, the outer lid D includes a lid 50 and a sealing ring 51 for tamper evidence (preventing tampering), and the lid 50 is an inner ring for sealing the spout 10 of the plug body B. 50b and a rib 50c.

  The plug body B has a dispensing tube 1 and a welded portion 2 formed therebelow. The dispensing cylinder 1 has a substantially cylindrical shape, and is continuous with the small-diameter cylindrical portion 11 via a small-diameter cylindrical portion 11 having a spout 10 at the tip, a stepped portion 12 continuous with the base end of the small-diameter cylindrical portion 11, and the stepped portion 12. A large-diameter cylindrical portion 13 continuous with the welded portion 2 is provided at the base end. On the outer peripheral surface of the small cylinder diameter portion 11, a screw thread 11 a that is screwed with a screw thread 50 a formed on the inner peripheral surface of the cover part 50 of the outer cover D is formed. In addition, it is good also as providing the liquid pouring part smaller diameter than the small diameter cylinder part 11 in the front-end | tip of the small diameter cylinder part 11, and making the front-end | tip of the liquid pouring part into the spout 10. (In this case, the discharge amount of the content liquid is gradually reduced toward the spout 10).

  In addition, an annular ring portion 12 b that hangs down from the inner peripheral surface 12 a is formed at the inner peripheral edge portion of the stepped portion 12. The ring portion 12b is provided in contact with the upper surface of the valve body 4 of the check valve C or through a slight gap to prevent air from entering from a gap E described later. The welding part 2 has a substantially boat shape, is welded to an opening of a container body (not shown), and is formed to attach the spout A to the container body.

  The check valve C includes a valve seat tube 3 and a valve plate 4 formed in a separate body from the valve seat tube 3. The valve seat tube 3 is a substantially cylindrical member formed of, for example, a hard resin such as polypropylene, and has a base portion 30 and an outer peripheral wall 31 that is erected from the base portion 30 and has a smaller diameter than the base portion 30. . The outer peripheral wall 31 is formed in a tapered shape so as to facilitate attachment of the check valve C to the plug body B and form a gap E (see paragraph [0020]). 31a is provided with a substantially annular valve body mounting base 32 that protrudes inward from the inner peripheral surface of the outer peripheral wall 31 and forms a communication port 33 by the inner peripheral edge thereof.

  A valve body mounting surface 32 a and a valve seat 32 b are formed on the upper surface of the valve body mounting table 32. As will be described later (see paragraphs [0021] and [0022] for details), the valve seat 32b is a contact surface with the movable portion 40 of the valve body 4, and the surface thereof may be a smooth surface. Preferably, roughing such as blasting or embossing is performed.

  The valve body 4 is formed in a substantially plate shape with a material different from that of the valve seat tube 3, for example, an elastic material such as silicone rubber, and is a substantially annular outer peripheral edge portion 42 that is continuous through the movable portion 40 and the hinge portion 41. Have The movable part 40 is rotatable about the hinge part 41 as an axis. The valve body 4 is attached to the valve seat cylinder 3 by welding the outer peripheral edge portion 42 to the valve body mounting surface 32 a formed on the upper surface of the valve body mounting base 32 of the valve seat cylinder 3.

  In the present embodiment, a substantially C-shaped gap 43 is formed between the movable portion 40 and the outer peripheral edge portion 42. The gap 43 is formed to prevent the movable portion 40 and the outer peripheral edge portion 42 from wrapping when the movable portion 40 is closed. Although the width and thickness of the hinge portion 41 can be selected as appropriate, in this embodiment, the movable portion 40 is disposed after the content liquid is poured out in order to suck back the content liquid as will be described later. The width and thickness are flexible enough to return slowly to the original position (see paragraph [0022] for details).

  In the check valve C, the base portion 30 presses the inner peripheral surface 2a of the welded portion 2 of the plug body B in a state where the outer peripheral edge portion 42 of the valve body 4 is welded to the valve body mounting surface 32a of the valve seat cylinder 3. As shown in the figure, it is attached to the inside of the large-diameter cylindrical portion 13 and the welding portion 2 of the plug body B. At this time, the outer peripheral wall 31 of the valve seat tube 3 is the inner peripheral surface of the large-diameter cylindrical portion 13 and the welded portion 2 so that the valve body 4 and the inner peripheral surface 2a of the welded portion 2 are separated in the vertical direction and the radial direction. It is attached in a state where 13a and 2a do not contact. That is, the outer peripheral edge portion 42 of the valve body 4 is held between the ring portion 12b and the valve body mounting surface 32a (corresponding to the upper surface of the valve seat tube 3).

  At this time, when the valve seat cylinder 3 and the valve body 4 are integrally molded as in the prior art, since the elastic material such as silicone rubber used for the valve body 4 has a large frictional resistance, the check valve C is plugged. It becomes difficult to attach to the main body B. On the other hand, in this embodiment, since the valve seat tube 3 and the valve body 4 are separated and the valve seat tube 3 is formed of a hard resin such as polypropylene, the check valve C is easily attached to the plug body B. Can be done.

  A gap E is formed between the outer peripheral surface 31 b of the outer peripheral wall 31 of the valve seat tube 3 and the inner peripheral surfaces 13 a and 2 a of the large diameter cylindrical portion 13 and the welded portion 2. By forming the gap portion E, an air layer formed in the gap portion E becomes a wall when the weld portion 2 is welded to the container body, and as a result, heat is hardly conducted to the valve body 4. Therefore, it is possible to prevent the valve body 4 from being welded to the valve seat tube 3.

  As for the movable part 40 of the valve body 4, the outer peripheral edge part 40a always contacts the valve seat 32b of the valve body mounting base 32, and the communication port 33 is obstruct | occluded. When the content liquid in the container main body is poured out by tilting the container, the movable part 40 rotates upward about the hinge part 41 as a result of the pressure of the content liquid, and the blockage of the communication port 33 is released. To do.

  Thereafter, when the container is returned to the original position, the movable portion 40 again contacts the valve seat 32b with the outer peripheral edge portion 40a and closes the communication port 33. At this time, since the movable portion 40 of the opened valve body 4 is slowly rotated downward and returned to the original position, the content liquid remaining in the small-diameter cylindrical portion 11 of the plug body B is again stored in the container. The movable part 40 and the valve seat 32b are sealed by returning to the main body (sucking back) and the surface tension. At this time, when the valve seat 32b is roughened, the surface tension of the liquid content acting between the movable portion 40 and the valve seat 32b is adjusted, and the sucking back becomes easier.

  Further, when there is a slight gap between the ring portion 12b and the upper surface of the valve body 4, the content liquid enters the gap when sucking back, and the gap is closed by the surface tension. In addition, backflow of outside air into the container can be prevented.

  A second embodiment of the present invention will be described with reference to FIG. The difference from the first embodiment is that a substantially cylindrical wall 34 is erected on the outer peripheral edge of the valve seat mounting table 32, and the valve body mounting surface 32 a and the valve seat 32 b are provided inside the wall 34. That is. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  The wall portion 35 is formed so as to be loosely fitted into the annular groove F between the large-diameter cylindrical portion 13 and the ring portion 12b when the check valve C is attached to the stopper body B. Thereby, when the check valve C is attached to the stopper main body B, the positioning becomes easy, and the position of the movable portion 40 can be prevented from being displaced during use.

  A third embodiment of the present invention will be described with reference to FIG. The difference from the second embodiment is that the outer peripheral edge portion 42 of the valve body 4 is not welded to the valve body mounting surface 32a and is movable with respect to the ring portion 12b. Since other configurations are the same as those of the first and second embodiments, description thereof is omitted.

  In the present embodiment, a gap (hereinafter referred to as a movable range G) that is a range in which the valve body 4 is movable is formed. The movable range G is preferably a gap of less than 0.3 mm in the vertical direction. If the clearance is 0.3 mm or more, even if the liquid content enters between the ring portion 12b and the upper surface of the valve body 4, the movable area G cannot be closed due to the surface tension, and backflow of outside air may occur. Increases nature.

  In this embodiment, since the outer peripheral edge 42 of the valve body 4 is not welded to the valve body mounting surface 32a and is movable between the movable ranges G, the valve body 4 is removed when the content liquid is poured out. It takes a longer time until the movable part 40 of the valve body 4 again closes the communication port 33, and the liquid contents are easily sucked back. In addition, since the process of welding the valve body 4 to the valve seat tube 3 can be omitted in the manufacturing process of the pouring tap A, the pouring tap A can be manufactured more easily.

  As described above, in the present invention, the valve body 4 and the valve seat cylinder 3 of the check valve C are formed separately and from different materials, and between the valve seat cylinder 3 and the dispensing cylinder 1 of the plug body B. Since the gap E is provided, there is no product failure in which the check valve C is deformed during the welding process, and the discharge plug A can be provided in which the valve body 4 is reliably opened and closed during use. In addition, since the inner solution remaining in the small-diameter cylindrical portion 11 of the dispensing cylinder 1 after the dispensing of the inner solution is sucked back into the container body, it is possible to prevent the liquid pool from being generated at the outlet 10. .

  As a secondary effect of the present invention, normally, when the valve body 4 and the valve seat cylinder 3 are integrally formed, the valve body 4 needs to be thick, but the valve body 4 as in the present invention. If the valve seat tube 3 is formed as a separate body, the valve body 4 can be formed thin, and the manufacturing cost can be reduced.

  A fourth embodiment of the present invention will be described with reference to FIGS. 6 and 7 (a). The difference from the first embodiment is that a valve body mounting table 32A having a liquid reservoir is provided instead of the valve body mounting table 32. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  In the present embodiment, a concave groove 32c serving as a liquid reservoir is formed on the upper surface of the valve body mounting base 32A of the valve seat tube 3. In the present embodiment, the concave groove 32c is an annular groove formed on the outer peripheral end side of the valve seat 32b of the valve body mounting base 32A and continuous in the circumferential direction, and preferably has a depth of 0.2 mm to 0.5 mm. More preferably, roughening such as blasting or embossing is performed on the surface together with the valve seat 32b. The roughness of the roughing process is particularly preferably 10 μm to 100 μm.

  In this embodiment, in order to prevent the contact area between the valve body mounting base 32A and the movable part 40 of the valve body 4 from being narrowed by forming the concave groove 32c, the valve body mounting base 32A is the first one. It is formed so as to extend in the inner diameter direction as compared with the valve body mounting table 32 of the embodiment.

  In the present embodiment, when the content liquid is sucked back, it is possible to keep a part of the content liquid in the concave groove 35. Due to the presence of this liquid pool, the content liquid can be kept for a longer period of time. The surface tension of the content liquid can be applied between the movable part 40 and the valve seat 32b. Therefore, for example, even in a highly volatile content liquid such as alcohol, backflow of outside air into the container can be prevented more reliably by the surface tension.

  Further, since it is possible to increase the contact area between the liquid reservoir and the movable part 40 of the valve body 4, it is possible to exert a larger surface tension between the movable part 40 and the valve seat 32b. Even when the content liquid has a low surface tension such as alcoholic beverages, it is possible to more reliably prevent the backflow of outside air into the container due to the surface tension.

  In the present embodiment, the concave groove 32c is formed over the entire circumference of the valve seat 32b. However, at least the content liquid tends to remain after pouring (there is a hinge portion 41 of the valve body 4). It is also possible to form partly on the side opposite to the direction. Further, as in the fifth embodiment of the present invention (see FIGS. 6 and 7B), it is possible to intermittently form the concave grooves 32c in the circumferential direction. In this way, the same effect as that of the fourth embodiment can be obtained.

A spout B B plug body 1 spout tube 10 spout 11 small diameter tube portion 11a thread 12 step portion 12a inner surface 12b ring portion 13 large diameter tube portion 13a inner peripheral surface 14 liquid pouring portion 2 welded portion 2a inner peripheral surface C Check valve 3 Valve seat cylinder 30 Base 31 Outer peripheral wall 31a Tip 31b Outer peripheral surface 32 Valve body mounting base 32a Valve body mounting surface 32b Valve seat 32c Concave groove 33 Communication port 34 Wall 4 Valve body 40 Movable part 40a Outer peripheral edge Part 41 hinge part 42 outer peripheral end part 43 gap D outer lid 50 lid 50a screw 50b inner ring 50c rib 51 sealing ring E gap part F annular groove G movable range

Claims (11)

A spout with a check valve welded to the opening of the bag-like container,
The spout has a spout tube and a welded portion formed below the spout tube, and inside the spout plug, a valve seat tube held on the inner side of the welded portion, and the It has a check valve consisting of a valve body provided on the upper surface of the valve seat cylinder,
The valve seat tube is formed separately from the valve body and is held so as to form a gap between the upper surface side of the outer peripheral wall and the inner peripheral surface of the extraction tube. Dispensing tap with check valve.   The pouring tap with a check valve according to claim 1, wherein the valve body is a plate-like member having an outer peripheral edge portion and a movable portion provided inward from the outer peripheral edge portion via a hinge. .   The dispensing cylinder has a large-diameter cylindrical portion on the proximal end side and a small-diameter tubular portion on the distal end side, and the upper surface of the valve seat cylinder is located inward of the large-diameter cylindrical portion of the dispensing cylinder. The pouring tap with a check valve according to claim 1 or 2.   The dispensing cylinder has a ring portion that hangs down from an inner surface at a stepped portion connecting the large diameter cylindrical portion and the small diameter cylindrical portion, and the valve body is a valve body formed on an upper surface of the valve seat cylinder. The pouring tap with a check valve according to claim 3, wherein the pouring tap is held between the mounting surface and the ring portion.   The outer peripheral wall of the said valve seat cylinder is a taper shape, The pouring tap with a non-return valve in any one of the Claims 1 thru | or 4 characterized by the above-mentioned.   6. A check valve with a check valve according to claim 2, wherein the upper surface of the valve seat cylinder is roughened on a contact surface with the movable portion of the valve body. The tap.   7. A check valve according to claim 2, wherein a liquid reservoir is formed on the upper surface of the valve seat cylinder at a portion that contacts the movable part of the valve body. Pouring tap.   The pouring tap with a check valve according to claim 7, wherein the liquid reservoir is a concave groove.   The pouring tap with a check valve according to claim 8, wherein the concave groove is formed continuously or intermittently in the circumferential direction.   The pouring tap with a check valve according to claim 7, wherein the concave groove is roughened.   11. The pouring tap with a check valve according to claim 8, wherein the concave groove is formed with a depth of 0.2 mm to 0.5 mm.

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