JP7163643B2 - mouth plug - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spout that is attached to a container containing liquid or powder for suction use, and relates to a spout that has a relatively simple structure, can be re-opened and re-closed, and has good sealing performance. .

2. Description of the Related Art Conventionally, as a container for storing liquids and powders, there is known a so-called bag-in-box container in which a spout is attached to a flexible bag-like container and the whole is housed in a paper box or the like. The bag-in-box does not use the entire contents at once, but even when used in small quantities, the container shrinks according to the amount used, so the contents can be used to the end without being exposed to air. It has the advantage of being able to

The spout structure and nozzle described in Patent Document 2 are spouts used in this bag-in-box. The requirements were so high that it could not be used for items such as disposable containers that could not be costly. It is an attempt to solve the problem that it must be difficult to deal with.

A conventional bag-in-box generally has a system in which the box is attached to a predetermined server and the contents are taken out by gravity from a spout attached to the bottom of the box. The spout described in Patent Document 2 also has a similar structure.

However, a container with a large capacity may be difficult to lift and turn upside down due to its considerable weight. Therefore, for example, there is a demand to use a container for supplying ink to a printing machine by suction with a suction pump, but the plug described in Patent Document 2 cannot meet this requirement.

Japanese Patent No. 3411270 JP 2016-216073 A

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to propose a resealable spout that allows the contents to be expelled from the top of the container by suction.

As a means for solving the above problems, the invention according to claim 1 is a synthetic resin spout that is used by being attached to the opening of a container, comprising a spout body, a suction straw and a cap. is,
The plug main body is integrally formed with a cylindrical outer cylinder having a male thread to which the cap is screwed, a flange portion for holding the entire plug, and a welding portion for welding to the opening of the container. has been
The suction straw is fitted to the inner periphery of the outer cylinder of the plug body, the bottom is a cylindrical tube that reaches the bottom of the container, and the top is locked to the top of the outer cylinder. has a collar for
The cap includes a threaded portion having a female thread on the inner periphery thereof to be screwed with the male thread provided on the outer cylinder of the plug main body, and a suction plug that fits on the inner periphery of the suction straw to suck the contents. and a movable valve inside the inner cylinder that can slide axially on the inner circumference of the inner cylinder,
The movable valve has a recess that engages with a protrusion provided at the tip of the suction plug, and closes the opening at the tip of the inner cylinder when the suction plug is not inserted. is inserted, the convex portion at the tip of the suction plug and the concave portion of the movable valve are elastically engaged to slide on the inner circumference of the inner cylinder, the tip of the inner cylinder is released, and the suction plug is released . At the time of withdrawal, the protrusion at the tip of the suction plug and the recess of the movable valve are elastically engaged to move the movable valve to its original position to close the opening at the tip of the inner cylinder. It is a mouth plug characterized by

The spout according to the present invention has a relatively simple structure composed of a small number of parts, but can be used for suction, and can be opened and resealed by the action of the movable valve.

Further, the invention according to claim 2 is characterized in that the brim of the suction straw and the cap are sealed by a contact ring provided inside the uppermost part of the cap. It is a mouth plug.

Further, the invention according to claim 3 is characterized in that the brim of the suction straw and the cap are sealed by an elastic packing inserted inside the uppermost part of the cap. It is a mouth plug.

Further, the invention according to claim 4 is a suction contents dispensing container provided with the spout according to any one of claims 1 to 3 .

Although the spout according to the present invention has a relatively simple structure consisting of a small number of parts such as a spout body, a suction straw and a cap, it can be used for suction, which was impossible with conventional spouts. Furthermore, the function of the movable valve made it possible to open and reseal.

Since the number of constituent parts is small and all the parts can be molded with general-purpose synthetic resin, it can be manufactured at a low cost.

Conventionally, the entire container was turned upside down and used by placing it on a dedicated server or the like because it was necessary to supply the contents from the bottom of the container by gravity. However, since it is now possible to use suction, even large containers do not need to be lifted or turned upside down, improving usability.

When the brim of the suction straw and the cap are sealed by tightening the cap, as in the inventions of claim 2 and claim 3, the outer cylinder of the plug body Since there is no need to strictly adjust the accuracy of the suction straw, the inner cylinder of the cap, etc., the manufacturing cost can be kept low.

A container provided with a spout according to the present invention can be preferably used as a container for supplying ink to a printing machine or a copying machine.

The spout according to the present invention can be easily adapted to containers of various sizes by simply adjusting the length of the suction straw according to the size of the container and using other parts in common. is.

FIG. 1 is a perspective view showing one embodiment of the plug according to the present invention. 2 is a perspective view showing a state in which the cap is removed from the state shown in FIG. 1. FIG. FIG. 3 is a perspective view showing three parts constituting the spout according to the present invention, with the suction straw removed from the state of FIG. FIG. 4 is a cross-sectional explanatory view schematically showing a state in which one embodiment of the spout according to the present invention is attached to a container. FIG. 5 is a cross-sectional explanatory view schematically showing a state in which a suction plug is about to be inserted into the spout according to the present invention. 6 is a cross-sectional explanatory view schematically showing a state in which the movable valve is opened by completely inserting the suction plug from the state of FIG. 5. FIG. FIG. 7 is a cross-sectional explanatory view schematically showing a state in which another embodiment of the spout according to the present invention is attached to a container.

Hereinafter, the plug according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of a plug 1 according to the present invention. FIG. 2 is a perspective view showing a state in which the cap 30 is removed from the state shown in FIG. Furthermore, FIG. 3 is a perspective view showing three parts constituting the plug 1 according to the present invention, that is, the plug main body 10, the suction straw 20, and the cap 30, with the suction straw 20 removed from the state shown in FIG. . Moreover, FIG. 4 is a cross-sectional explanatory view schematically showing a state in which one embodiment of the plug 1 according to the present invention is attached to the container 2. As shown in FIG.

A spout 1 according to the present invention is a spout made of synthetic resin that is attached to the opening of a container 2 and used, and comprises a spout body 10 , a suction straw 20 and a cap 30 .
The plug body 10 includes a cylindrical outer cylinder 11 having a male thread 14 with which the cap 30 is screwed, a flange portion 12 for holding the entire plug, and a welding portion for welding to the opening of the container 2. 13 are integrally molded.
The suction straw 20 is a cylindrical tube that is fitted to the inner circumference of the outer cylinder 11 of the plug body 10 and reaches the bottom surface of the container 2 at the bottom, and is engaged with the top of the outer cylinder 11 at the top. It has a flange portion 21 for stopping. By adjusting the length of the suction straw 20 according to the size of the container, it can be applied to containers of various sizes. The tip of the suction straw 20 may be uneven so as not to stick to the bottom of the container.
The cap 30 is fitted with a threaded portion 31 having a female thread on its inner periphery that engages with the male thread 14 provided on the outer cylinder 11 of the plug main body 10, and is fitted on the inner periphery of the suction straw 20 to suck the contents. The inner cylinder 32 into which the suction plug 40 can be inserted is provided inside the inner cylinder 32 with a movable valve 33 that can slide axially on the inner circumference of the inner cylinder.
The movable valve 33 closes the opening at the tip of the inner cylinder 32 when the suction plug 40 is not inserted as shown in FIG. 5, and when the suction plug 40 is inserted as shown in FIG. When it is closed, it elastically engages with the tip of the suction plug and slides on the inner circumference of the inner cylinder to open the tip of the inner cylinder 32 .

When the suction plug 40 is removed from the mouth plug 1, the movable valve 33, which is engaged with the tip of the suction plug, moves to its original position together with the suction plug to open the opening at the tip of the inner cylinder 32. close again. That is, the container can be resealed and reopened.

In the example shown in FIG. 4, the collar 21 of the suction straw 20 and the cap 30 are sealed by a contact ring 34 provided inside the top of the cap.

On the other hand, in the example shown in FIG. 7, the brim portion 21 of the suction straw 20 and the cap 30 are sealed by a perforated disc-shaped elastic packing 35a inserted inside the uppermost portion of the cap. The collar portion and the plug main body 10 are sealed by a perforated disk-shaped elastic packing 35b arranged on the top of the plug main body. Various rubber materials can be used as the elastic packings 35a and 35b.

On the other hand, since the suction plug 40 and the inner cylinder 32 of the cap 30 are sealed by the ring packing 41 attached to the suction plug as shown in FIG. do not have.

Although not shown, in order to fill the container 2 to which the spout 1 according to the present invention is attached, a filling nozzle having the same shape as the suction plug 40 is inserted into the spout, and the same as shown in FIG. The filling can be performed while the movable valve 33 is open.

Various synthetic resins can be used as materials for the plug 1 according to the present invention. Specifically, polyolefin resins such as low density polyethylene resin (LDPE), high density polyethylene resin (HDPE), linear low density polyethylene resin (LLDPE), polypropylene resin (PP), polyolefin elastomer, and polyethylene terephthalate Resin (PET), polybutylene terephthalate resin (PBT), polyester resin such as polyethylene naphthalate resin (PEN), polymethyl methacrylate resin (PMMA), polyacrylonitrile resin, ABS resin, nylon-6, nylon-66 Polyamide resins such as polystyrene resins (PS), polyvinyl chloride resins (PVC), polyvinylidene chloride resins (PVDC), polycarbonate resins (PC), polyacetal resins, polysulfone resins, fluorine resins, and the like.

As an example of a specific combination, polyethylene (PE) resin is used for the plug main body 10, the suction straw 20, and the movable valve 33, and a harder PP resin is used for the cap 30. .

When the brim portion 21 of the suction straw 20 and the cap 30 are sealed by a contact ring 34 provided inside the uppermost portion of the cap, the material of the suction straw 20 is a soft LDPE resin with packing properties. , LLDPE resins and copolymers thereof, and preferably have a flexural modulus of less than 200 MPa.

On the other hand, when the brim portion 21 of the suction straw 20 and the cap 30 are sealed by the elastic packing 35a inserted inside the uppermost portion of the cap, the material of the suction straw 20 may be PE resin or PP. Hard materials such as resins and ABS resins can also be used. In this case, it is desirable to insert an elastic packing 35b between the suction straw 20 and the plug main body 10 in order to seal them.

DESCRIPTION OF SYMBOLS 1... Plug 2... Container 10... Plug body 11... Outer cylinder 12... Flange part 13... Welding part 14... Male screw 20... Suction straw 21... Collar portion 30 Cap 31 Screw portion 32 Inner cylinder 33 Movable valve 34 Contact rings 35a, 35b Elastic packing 40 Suction plug 41 ring packing

Claims (4)

A synthetic resin plug used by attaching it to the opening of a container, comprising a plug body, a suction straw and a cap,
The plug main body is integrally formed with a cylindrical outer cylinder having a male thread to which the cap is screwed, a flange portion for holding the entire plug, and a welding portion for welding to the opening of the container. has been
The suction straw is fitted to the inner periphery of the outer cylinder of the plug body, the bottom is a cylindrical tube that reaches the bottom of the container, and the top is locked to the top of the outer cylinder. has a collar for
The cap includes a threaded portion having a female thread on the inner periphery thereof to be screwed with the male thread provided on the outer cylinder of the plug main body, and a suction plug that fits on the inner periphery of the suction straw to suck the contents. and a movable valve inside the inner cylinder that can slide axially on the inner circumference of the inner cylinder,
The movable valve has a recess that engages with a protrusion provided at the tip of the suction plug, and closes the opening at the tip of the inner cylinder when the suction plug is not inserted. is inserted, the convex portion at the tip of the suction plug and the concave portion of the movable valve are elastically engaged to slide on the inner circumference of the inner cylinder, the tip of the inner cylinder is released, and the suction plug is released . At the time of withdrawal, the protrusion at the tip of the suction plug and the recess of the movable valve are elastically engaged to move the movable valve to its original position to close the opening at the tip of the inner cylinder. A mouth plug characterized by 2. The spout according to claim 1, wherein said suction straw collar and said cap are sealed by a contact ring provided inside the top of the cap. 2. The spout according to claim 1, wherein said suction straw brim and said cap are sealed by an elastic packing inserted inside the top of the cap. Claims 1 to 3 10. A suction contents dispensing container provided with a spout according to any one of Claims 1 to 3.

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