JP2011006072A - Mouth plug for spouting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mouth plug for spouting which little generates sagging of a liquid even for an alcohol-containing liquid and does not generate leakage of the liquid even when an article hits the tip of the mouth plug.SOLUTION: The mouth plug for spouting consists of a mouth plug body, a cap for opening and closing, and a plunger. The mouth plug body consists of a mounting part, an extraction cylinder, and a connecting cylinder. The extraction cylinder has a male screw on the outer peripheral face, and an angle between the lower end face of the extraction cylinder and the inner peripheral face of the extraction cylinder is ≤90°. The cap for opening and closing consists of a cap top plate with a cap inner ring to be fitted to the upper end of the plunger, and a cap peripheral wall on the inner peripheral face of which a female screw screwing with the male screw on the outer peripheral face of the extraction cylinder. The plunger has a fitting part to be fitted with the cap inner ring, integrally rotates with the cap for opening and closing, can slide up and down in the extraction cylinder. The lower end face of the plunger becomes recessed part at the central part and is closed, and the angle with the side face of the plunger is an acute angle, and the radius of the round is ≤0.3 mm, and is not projected from the lower end of the extraction cylinder.

Description

  The present invention relates to a pouring spout having an opening / closing function to be used by being attached to a spout opening opened on a side surface of a container for storing a liquid substance, and more particularly, to a pouring spout that hardly causes dripping after pouring. .

  2. Description of the Related Art Conventionally, as a spout plug having an opening / closing function that is used by being attached to a container that stores liquid contents, for example, a spout spout 101 that is the application of the present applicant shown in FIGS. It is known. These spout plugs 101 are plugs used by attaching to the container main body plug 103 attached to the side surface of the container main body 102 such as a bag-in-box, and by rotating the opening / closing cap 120, An open / close cylinder 130 that is integral with the open / close cap 120 or fixed to the open / close cap 120 moves upward while rotating in the extraction cylinder 111 by the action of a screw to open a liquid flow path. It has a structure that allows liquid to flow out.

  In the conventional spout plug shown in FIG. 11, the valve that is screwed into the spout cylinder during the distribution / storage process is loosened by an external impact or the like, causing a liquid leakage accident. This was done to solve the problem of liquid leakage due to external impacts during distribution and storage, lack of deadlines during use, etc. In addition, these conventional problems are solved by providing a return prevention mechanism for the valve that is screwed into the outlet tube of the plug body (see Patent Document 1).

  When the required amount of liquid is taken out and the opening / closing cap 120 is rotated to close the flow path, the liquid spout 101 shown in FIG. 11 stops flowing out of the liquid, but does not stop immediately. Finally, dripping sometimes occurred. The cause of the dripping is that the lower end 131 of the opening / closing cylinder 130 is open, and the liquid that has entered the inside of the opening / closing cylinder 130 from this opening may be dripped and dripped at the end. there were.

  The pouring port plug 101 shown in FIG. 12 is made for the purpose of solving this problem, and by having a structure in which the lower end surface 131 of the open / close cylinder 130 is closed, liquid does not enter the open / close cylinder. Thus, the occurrence of dripping is prevented (see Patent Document 2).

JP 2005-41543 A JP 2008-207867 A

  The pouring spout described in Patent Document 2 exhibits a dripping prevention effect for a normal liquid such as water, but has a low dripping prevention effect for a liquid containing alcohol. I understood. This is considered due to the low surface tension of the liquid containing alcohol.

  Moreover, since the lower end surface 131 of the opening / closing cylinder 130 protrudes more than the front-end | tip of the extraction pipe | tube 111 in the spout stopper described in patent document 2, when this part collides with something, the opening / closing cylinder 130 Moved and liquid leaked out.

The problem to be solved by the present invention is to solve the above-mentioned conventional problems, there is little occurrence of dripping even with a liquid containing alcohol, and liquid leakage even if an object hits the tip of the extraction plug. It is to provide a spout that does not cause a discharge.

As means for solving the above-mentioned problems, the invention according to claim 1 is a pouring spout composed of a spigot body, an opening / closing cap, and a plunger, wherein the spigot body is a container. A mounting portion that fits into the main body plug, a vertical extraction tube, a horizontal connection tube that is connected to the extraction tube at a right angle to a side surface at a predetermined position of the extraction tube, and connects the extraction tube and the mounting portion The extraction cylinder has an external thread on the outer peripheral surface, the angle formed by the lower end surface of the extraction cylinder and the inner peripheral surface of the extraction cylinder is 90 ° or less, and the cap for opening and closing is composed of a cap top plate and a cap peripheral wall. The cap top plate is suspended from the inside and has a cap inner ring that engages with the upper end of the plunger. The inner peripheral surface of the cap peripheral wall is provided with a female screw that engages with the male screw on the outer peripheral surface of the extraction cylinder. The plunger has the cap inner ring on the upper end It has a fitting part that fits, rotates integrally with the cap for opening and closing, can slide up and down inside the extraction cylinder, and the lower end surface of the plunger is closed with a concave part at the center, An angle between the end face and the side face of the plunger is an acute angle, the radius of roundness is 0.3 mm or less, and the lower end of the plunger does not protrude from the lower end of the extraction tube. is there.

  In addition, the invention according to claim 2 is the pouring spout according to claim 1, wherein the plunger has a projection-shaped opening stopper that is engaged with the upper end portion of the extraction cylinder. .

  The invention according to claim 3 is the spout plug according to claim 1 or 2, wherein the extraction cylinder is substantially vertical.

  The pouring spout according to the present invention has an angle between the lower end surface of the extraction cylinder and the inner peripheral surface of the extraction cylinder of 90 ° or less, an acute angle between the lower end surface of the plunger and the side surface of the plunger, and a radius of roundness Was 0.3 mm or less, and the lower end of the plunger was not protruded from the lower end of the extraction cylinder, so that even when used in a liquid containing alcohol, the plug was less prone to dripping.

  In addition, since the lower end of the plunger is not protruded from the lower end of the extraction cylinder, it is difficult to cause a problem that an object hits the lower end of the plunger, the plunger is retracted, and as a result, the liquid leaks.

  In addition, when the plunger has a projection-like opening stopper that is locked to the upper end portion of the extraction cylinder, a problem that the plug is loosened due to vibration or external force during transportation or the like is unlikely to occur.

  Furthermore, when the extraction cylinder is substantially vertical, liquid dripping is less likely to occur.

FIG. 1 is a side partial cross-sectional explanatory view showing an embodiment of a pouring spout according to the present invention. FIG. 2 is a front partial cross-sectional explanatory view of the pouring spout shown in FIG. FIG. 3 is an enlarged cross-sectional explanatory view of the spout portion of the spout plug according to the present invention. FIG. 4 is an enlarged cross-sectional view of the spout portion of the spout plug shown in FIGS. 1 and 2. FIG. 5 is an enlarged cross-sectional view of the spout portion in another embodiment of the spout plug according to the present invention. FIG. 6 is an enlarged cross-sectional view of the spout portion in another embodiment of the spout plug according to the present invention. FIG. 7 is an enlarged cross-sectional view of the spout portion in another embodiment of the spout plug according to the present invention. FIG. 8 is an enlarged cross-sectional view of a spout portion in a comparative example of the spout plug according to the present invention. FIG. 9 is an enlarged cross-sectional view of the spout portion in another comparative example of the spout plug according to the present invention. FIG. 10 is an enlarged cross-sectional view of the spout portion in another comparative example of the spout spout according to the present invention. FIG. 11 is an enlarged cross-sectional view of the spout portion in another comparative example of the spout plug according to the present invention. FIG. 12 is a cross-sectional explanatory diagram of a conventional pouring spout. FIG. 13 is a cross-sectional explanatory diagram of a conventional pouring spout.

  The pouring spout according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side partial cross-sectional explanatory view showing an embodiment of a pouring spout according to the present invention. FIG. 2 is an explanatory front sectional view of the spout plug shown in FIG. FIG. 3 is an enlarged cross-sectional explanatory view of the spout portion of the spout plug according to the present invention.

  The pouring spout 1 according to the present invention includes a splicing body 10, an opening / closing cap 20, and a plunger 30. Each of these is an integral part made of a synthetic resin, and can be molded by an injection molding method using a thermoplastic resin such as polypropylene resin, polyethylene resin, polyamide resin, or polyethylene terephthalate resin as a material.

  The plug main body 10 is connected to the extraction cylinder 11 by being connected to the mounting portion 13 fitted to the container main body plug 3, the vertical extraction cylinder 11, and the side surface of the extraction cylinder 11 at a predetermined position. It consists of a tube 11 and a horizontal connecting tube 14 that connects the mounting portion 13.

  The container main body plug 3 shown in FIG. 1 is assumed to be a so-called bag-in-box plug in which a container main body 2 that is a soft packaging bag is stored in a cardboard container. It is not limited to the packaging bag, but may be a hard plastic container or a metal container.

  In the embodiment shown in FIG. 1, the mounting portion 13 includes an inner sealing ring 16 that fits into the inner periphery of the opening of the container main body plug 3 and realizes sealing performance, and the outer periphery of the opening of the container main body plug 3. It has a flange shape provided with an occlusal cylinder 15 that fits into the mouthpiece and firmly fixes the pouring spout 1.

The extraction cylinder 11 is a cylindrical cylinder installed in the vertical direction, and a plunger 30 described later is fitted therein. In this embodiment, the inner surface of the extraction cylinder 11 has an inner diameter that gradually decreases downward, and the shoulder portion of the step provided on the outer periphery of the plunger 30 is in close contact with the shoulder portion of the step. It is the structure which seals.

  The dispensing cylinder 11 has a male screw 18 on the outer peripheral surface, and is fitted to a female screw 24 provided on the inner periphery of a cap peripheral wall 22 described later. A lower end portion of the dispensing cylinder 11 forms a dispensing port 19 through which liquid flows out. Further, as shown in FIG. 3, the angle α formed by the lower end surface 12 of the extraction cylinder and the inner peripheral surface of the extraction cylinder is 90 ° or less.

  The connection cylinder 14 is a cylindrical portion that connects the extraction cylinder 11 and the mounting portion 13, and is connected to the side surface of the extraction cylinder 11 at a predetermined position and communicates with the extraction cylinder 11. This communication portion forms a communication port 17.

  The opening / closing cap 20 includes a cap top plate 21 and a cap peripheral wall 22, and the cap top plate 21 includes a cap inner ring 23 that is suspended inwardly and that engages with a fitting portion 34 at the upper end of the plunger 30. ing. On the inner peripheral surface of the cap peripheral wall 22, a female screw 24 that is screwed with the male screw 18 on the outer peripheral surface of the extraction cylinder is provided. In this embodiment, since the male screw 18 and the female screw 24 are multi-threaded screws having a rough pitch, the cap 20 for opening and closing is greatly moved up and down by a small rotation angle.

  The plunger 30 has a fitting portion 34 that fits the cap inner ring 23 at the upper end, and rotates together with the opening / closing cap 20. Therefore, the plunger 30 can slide up and down inside the extraction cylinder 11. Further, as shown in FIGS. 1 and 3, the plunger lower end surface 31 is closed with a concave portion at the center, and the angle β formed between the plunger lower end surface 31 and the plunger side surface is an acute angle and is rounded. The radius r is 0.3 mm or less, and the lower end of the plunger 30 does not protrude from the lower end of the extraction cylinder 11.

  In this embodiment, the plunger 30 has a protrusion-shaped opening stopper 32 that is engaged with the upper end of the extraction cylinder 11 at the top. The opening stopper 32 has a certain resistance when the stopper is opened from the closed state, and has an effect of preventing the stopper from being inadvertently opened. Further, the plunger 30 is provided with a protrusion 33 for preventing slipping that is higher than the stopper 32, and the protrusion 33 for preventing slipping is locked to the upper end of the dispensing cylinder 11 so that the plunger 30 Escape from the dispensing cylinder 11 is prevented. FIG. 1 shows a state in which the plunger 30 is in the lowest position, that is, a state in which the plug is closed, and FIG. 2 shows a state in which the plunger 30 is in the uppermost position, that is, the plug is open. This shows the state.

  When the opening / closing cap 20 is rotated from the state of FIG. 1, the plunger 30 fitted to the opening / closing cap 20 rotates integrally. At this time, since the male screw 18 provided on the outer periphery of the dispensing tube 11 and the female screw 24 provided on the inner periphery of the cap peripheral wall are screwed together, the plunger 30 rotates upward together with the opening / closing cap 20. Slide. As a result, the liquid stored in the container main body 2 flows out from the spout 19 through the communication port 17 from the container main body plug 3. FIG. 2 shows a state in which the plunger 30 is raised most, and the pouring spout 1 is in a fully opened state.

  When the opening / closing cap 20 is rotated in the reverse direction from the state of FIG. 2 and the plunger 30 is lowered, the flow path of the liquid gradually narrows and the outflow of the liquid gradually decreases. As a result, the flow path is closed and the outflow of liquid is also stopped. At this time, it can be seen that whether or not the liquid drips depends on the type of the liquid, the structure of the spout 19 and the structure of the tip of the plunger 30, and the present invention has been completed.

According to the inventor's study, the angle formed between the lower end surface 12 of the dispensing cylinder 11 and the inner peripheral surface of the extraction cylinder is 90 ° or less, the plunger lower end surface 31 is closed with the central portion as a recess, and the plunger lower end surface 31 is further closed. The angle formed by the plunger side surface is an acute angle, the radius of roundness is 0.3 mm or less, and the lower end of the plunger 30 is not protruded from the lower end of the extraction tube 11, so that the liquid containing alcohol can be obtained. However, it has been found that liquid dripping is hardly caused. This is considered to be because the liquid at the time of closing collects in the outer periphery of the distal end of the plunger 30 and the spout 19 adjacent thereto.

  FIG. 4 is an enlarged cross-sectional view of the spout portion of the spout plug shown in FIGS. 1 and 2, and FIGS. 5, 6, and 7 show other spout plugs according to the present invention. It is an expanded sectional view of the spout part in an embodiment. In the pouring spout according to the present invention, the angle formed by the lower end surface 12 of the pouring tube 11 and the inner peripheral surface of the extraction tube is 90 ° or less, and the plunger lower end surface 31 is closed with a concave portion at the center. The angle formed between the plunger lower end surface 31 and the plunger side surface is an acute angle, the radius of roundness is 0.3 mm or less, and the lower end of the plunger 30 does not protrude from the lower end of the extraction tube 11. .

  The embodiments shown in FIGS. 4 to 7 all satisfy these conditions in the spout 19 portion, and even if it is a liquid containing alcohol that is liable to dripping, dripping does not easily occur. In the embodiment shown in FIGS. 4 and 7, the plunger lower end surface 31 has a conical recess at the center, and in the embodiment shown in FIG. 5, the plunger lower end surface 31 has a hemispherical center. Indented. In the embodiment shown in FIG. 6, the plunger lower end surface 31 has a flat central portion recessed from the outer periphery. In any of the embodiments, the angle formed by the lower end surface 12 of the dispensing cylinder 11 and the inner peripheral surface of the extraction cylinder is 90 ° or less, the plunger lower end face 31 is closed, and the plunger lower end face 31 and the plan The angle formed by the side surfaces of the jar is an acute angle, and the radius of roundness is 0.3 mm or less.

  In addition, even if it is the pouring stopper shown in FIGS. 4-7, when it inclines, it will become easy to produce a liquid dripping. The probability that the liquid dripping occurs is the lowest when the pouring cylinder is installed so as to be vertical.

  The example shown in FIGS. 8-11 shows the spout part in the comparative example of the spout stopper which concerns on this invention, and all do not satisfy | fill the above-mentioned conditions in any point. . In the example of FIG. 8, the angle formed between the plunger lower end surface 31 and the plunger side surface is an acute angle, but the radius of roundness is 1 mm, which is larger than 0.3 mm. In the example of FIG. 9, the angle formed by the plunger lower end surface 31 and the plunger side surface is a right angle and not an acute angle. In the example of FIG. 10, the angle formed by the lower end surface 12 of the extraction tube 11 and the inner peripheral surface of the extraction tube is an obtuse angle. In the example of FIG. 11, as in the example of FIG. 9, the angle formed by the plunger lower end surface 31 and the plunger side surface is a right angle and not an acute angle.

In the examples shown in FIGS. 8 to 11, in any case, dripping is likely to occur when used for a liquid containing alcohol.
Hereinafter, based on an Example, the tap for extraction which concerns on this invention is demonstrated concretely.

  A pouring spout having the shape shown in FIGS. 1 and 2 was produced. The plug body and the cap for opening and closing were made of polypropylene resin, and the plunger was made of polyethylene resin, both of which were molded by injection molding. The assembled pouring spigot was attached to the cap of a bag-in-box filled with red wine so that the pouring tube was vertical, 300 pouring tests were conducted, and the occurrence probability of dripping was examined.

  The plug body and the cap for opening and closing were the same as those used in Example 1, and an outlet plug was prepared by changing only the shape of the tip of the plunger as shown in FIG. A pour-out test was conducted in the same manner as above.

  The spout body and the cap for opening and closing were the same as those used in Example 1, and a spout plug with only the shape of the tip of the plunger changed as shown in FIG. A pour-out test was conducted in the same manner as above.

The plunger and the cap for opening and closing are the same as those used in Example 1, and the plug body is the same as the shape of the tip of the pouring tube, and the pouring tube lower end surface as shown in FIG. A pouring spout was prepared by changing the angle formed by the inner peripheral surface of the cylinder to 90 °, and a pouring test was conducted in the same manner as in Example 1.
<Comparative Example 1>

A dispensing test was performed in the same manner as in Example 1 using the conventional dispensing plug shown in FIG.
<Comparative Example 2>

The spout body and the cap for opening and closing were the same as those used in Example 1, and a spout plug was prepared by changing only the shape of the tip of the plunger as shown in FIG. A pour-out test was conducted in the same manner as above. The angle formed by the lower end surface of the plunger and the side surface of the plunger in the figure has a rounded radius of 1 mm.
<Comparative Example 3>

The plug body and the cap for opening and closing were the same as those used in Example 1, and a spout plug was prepared by changing only the shape of the tip of the plunger as shown in FIG. A pour-out test was conducted in the same manner as above.
<Comparative example 4>

The plunger and the cap for opening and closing are the same as those used in Example 1, and the spout body is prepared as a spout plug with only the shape of the tip of the spout cylinder changed as shown in FIG. A pouring test was carried out in the same manner as in Example 1.
<Comparative Example 5>

The plug body and the cap for opening and closing were the same as those used in Example 1, and a spout plug was prepared by changing only the shape of the tip of the plunger as shown in FIG. A pour-out test was conducted in the same manner as above.
<Comparative Example 6>

  Using the pouring spout used in Example 1, the pouring test was conducted in the same manner as in Example 1 with the pouring tube inclined 30 ° rearward.

このように、本発明に係る注出用口栓は、アルコールを含む液体に対しても、液垂れが生じ難いことが分かる。また、プランジャーの先端が注出筒先端よりも突出していないため、プランジャーの先端にものが当たって、プランジャーが引っ込み、液が漏れ出す問題が生じにくいものである。 The results are shown in Table 1.

Thus, it turns out that the dripping stopper which concerns on this invention does not produce liquid dripping also with respect to the liquid containing alcohol. In addition, since the tip of the plunger does not protrude from the tip of the dispensing cylinder, a problem that the plunger hits the tip of the plunger and the plunger is retracted and the liquid leaks is less likely to occur.

DESCRIPTION OF SYMBOLS 1 ... Outlet plug 30 ... Plunger 2 ... Container main body 31 ... Plunger lower end surface 3 ... Container main body plug β ... Plunger lower end angle 10 ... Mouth plug body 32 .. Opening stopper 11... Pouring tube 33... Prevention protrusion 12... Pouring tube lower end surface 34. r ... radius of the lower end of the plunger 13 ... mounting part 101 ... spout plug 14 ... connection tube 102 ... container body 15 ... occlusion tube 103 ... container body Mouth plug 16 ... Inner sealing ring 111 ... Outlet tube 17 ... Communication port 119 ... Outlet 18 ... Male screw 120 ... Opening / closing cap 19 ... Outlet 130 ... Opening / closing cylinder 20 ... Opening / closing cap 131 ... Opening / closing cylinder lower end surface 21 ... Cap top plate 22 ... Cap peripheral wall 23 ... Cap inner ring 24 ... Female thread

Claims (3)

  A spout spout composed of a spigot body, a cap for opening and closing, and a plunger, the spigot main body comprising a mounting portion that fits into the container main body spigot, a vertical extraction cylinder, and an extraction cylinder It is connected to the extraction tube at a right angle to communicate with the extraction tube, and is composed of a horizontal connection tube that connects the extraction tube and the mounting portion. The extraction tube has an external thread on the outer peripheral surface, and has a lower end surface of the extraction tube. The angle formed by the inner peripheral surface of the extraction cylinder is 90 ° or less, and the cap for opening and closing is composed of a cap top plate and a cap peripheral wall, and the cap top plate is suspended inward and is fitted to the upper end of the plunger. The inner circumferential surface of the cap peripheral wall is provided with a female screw that is screwed with the male screw on the outer peripheral surface of the extraction cylinder, and the plunger is fitted to the upper end to fit the cap inner ring. It has a joint and rotates together with the cap for opening and closing, and the extraction It can slide up and down, and the lower end of the plunger is closed at the center, and the angle between the lower end of the plunger and the side of the plunger is an acute angle, and the radius of the roundness is 0.3 mm The pouring spout is characterized in that the lower end of the plunger does not protrude from the lower end of the extraction cylinder.   The spout stopper according to claim 1, wherein the plunger has a projection-shaped opening stopper that is engaged with an upper end portion of the extraction cylinder.   3. The spout plug according to claim 1 or 2, wherein the extraction cylinder is substantially vertical.

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