JP7088558B2 - Container spout structure and spout - Google Patents

Description

The present invention relates to a spout structure in which a resin spout is press-fitted into an opening of a container, and a spout used for the spout structure.

A container that is sealed by press-fitting a resin spout into the opening may be shipped with the spout fitted in the opening when the manufacturer delivers it to the user. However, due to changes in the temperature and air pressure of the environment in which the container is placed during the shipping process, the volume of air inside the sealed container may increase or decrease, causing the container to swell or dent. There was a problem that the posture of the stacked containers became unstable or collapsed. If the container swells or dents too much, the container may be damaged.

In addition, if the container is stored for a long time with the spout fitted in the opening, the resin spout will be deformed to match the diameter of the opening, and the container will actually be filled with the contents. There is a problem that the tension of the spout that should be press-fitted into the opening decreases during use.

Therefore, it has been proposed that the spout can be put into a temporary plug state in which the spout is halfway fitted into the opening, and that the inside and outside of the container are ventilated through the spout in the temporary plug state (see Patent Document 1). In this proposal, a spout (referred to as an "inner lid" in Patent Document 1) attached to an opening of a container (referred to as a "liquid outlet" in Patent Document 1) is fitted into the opening. The fitting part that seals the container has a two-stage structure in which approximately half has a smaller diameter than the other approximately half. Then, a groove is provided in the small diameter portion of the fitting portion, and this groove is formed so as to extend to the middle of the large diameter portion. With such a configuration, in the temporarily plugged state where the container is fitted to the small diameter part, it can be ventilated through the groove, so that the container swells or dents due to changes in the temperature and atmospheric pressure of the space where the container is placed. It is possible to prevent it from becoming dull. In addition, when the container is filled with contents, the container can be sealed by fitting it into the opening up to the large diameter part, and even if the small diameter part is deformed by being stored for a long time in a temporarily plugged state. There is an advantage that it does not easily affect the sealing of the container due to the large diameter part.

However, in the spout of Patent Document 1, a groove is formed up to the middle of the large-diameter portion that seals the container when the container is filled with the contents. Therefore, the area where the large diameter portion and the opening are in close contact with each other is reduced by the amount of the groove, and there is a possibility that the sealing becomes insufficient. In addition, when the posture of the container is tilted, the contents may flow along the groove to the large diameter part, so if the spout moves in the direction of disengagement due to the force of the inflow, the end of the groove will be exposed. , There was a risk that the contents would leak through the groove.

Japanese Patent No. 5033088

Therefore, in view of the above circumstances, the present invention has a container spout structure in which the inside and outside of the container can be ventilated in the temporarily plugged state, and the container can be sufficiently sealed when the container is filled with the contents. , And the provision of a spout used for the spout structure is an object.

In order to solve the above-mentioned problems, the mouth plug structure of the container according to the present invention (hereinafter, may be simply referred to as “mouth plug structure”) is used.
"A spout having a cylindrical spout body and a closure that closes at least one end of the spout body is the spout structure of the container attached to the opening of the container.
The spout main body has a large diameter portion having an outer diameter larger than the inner diameter of the opening and a small diameter portion having a diameter smaller than the large diameter portion, and the boundary between the large diameter portion and the small diameter portion is a stepped portion. And
While the large diameter portion has neither a protrusion nor a recess on its outer peripheral surface, it has no protrusion or recess.
The small diameter portion has one or more ribs protruding from the outer peripheral surface thereof.
The distance from the central axis of the spout body to the outer surface of the rib is larger than the radius of the opening, and the outer surface of the rib is continuous with the outer peripheral surface of the large diameter portion .
In a temporary plug state in which the rib is inserted into the opening from the small diameter portion to the step portion at the boundary with the large diameter portion, the rib is press-fitted into the opening, so that the small diameter portion is deformed in the vicinity of the rib. At the same time , the large-diameter portion is also deformed in the vicinity of the rib, so that a gap is formed between the spout main body and the opening in the vicinity of the step portion .
The opening is closed by further press-fitting the large diameter portion into the opening. "

When the container is delivered from the manufacturer to the user, it is in a temporary plug state in which the boundary between the small diameter portion and the large diameter portion is inserted into the opening. The small diameter has one or more ribs, and the distance from the central axis of the spout body to the outer surface of the rib is larger than the radius of the opening, so when the small diameter is inserted into the opening, the ribs It will be press-fitted into the opening.

When the rib is press-fitted into the opening when the small-diameter portion is inserted into the opening, the small-diameter portion is deformed in the vicinity of the rib so as to be pulled by the rib pushed inward due to the press-fitting, and the large-diameter portion and the small-diameter portion are formed. A gap is formed between the opening and the main body of the spout very close to the boundary with the portion. As a result, the inside and outside of the container are ventilated through this gap, so even if the temperature or atmospheric pressure of the environment in which the container in the temporarily plugged state changes, it is possible to prevent the container from swelling or denting. It is possible to prevent the posture of the stacked containers from becoming unstable and the containers from being damaged.

On the other hand, when the user fills the container with a liquid and uses it, the spout is set to be further pushed into the opening, and the large diameter portion is fitted into the opening. Since the outer diameter of the large diameter portion is larger than the inner diameter of the opening, the large diameter portion is press-fitted into the opening, and the outer peripheral surface of the large diameter portion is in strong contact with the inner peripheral surface of the opening. There are no protrusions or recesses on the outer peripheral surface of the large diameter portion, and the "whole outer peripheral surface of the large diameter portion" is in close contact with the inner peripheral surface of the opening, so that the container can be sufficiently sealed. Further, since the large diameter portion that is brought into close contact with the opening when the container is sealed is a portion that is not used in the temporarily plugged state, the large diameter portion is the opening even if the container is stored for a long time in the temporarily plugged state. It has the advantage that the tension when press-fitted into is not weakened.

In addition to the above configuration, the spout structure of the container according to the present invention is
It can be assumed that "the number of the ribs is three".

In this configuration, since the number of ribs is three, it is easy to center the small diameter portion inside the opening by guiding the ribs, and it is easy to insert the small diameter portion into the opening.

Next, the spout according to the present invention is
"It comprises a cylindrical spout body and a closure that closes at least one end of the spout body.
The spout body has a large diameter portion and a small diameter portion having a smaller diameter than the large diameter portion.
While the large diameter portion has neither a protrusion nor a recess on its outer peripheral surface, it has no protrusion or recess.
The small diameter portion has one or more ribs protruding from its outer peripheral surface. "

This is the configuration of the spout used in the spout structure described above. With such a configuration, it is possible to attach the container to the opening of the container in a temporarily plugged state to ventilate the inside and outside of the container, or to press-fit the opening to the large diameter portion to seal the container.

As described above, according to the present invention, a container spout structure capable of ventilating the inside and outside of a container in a temporarily plugged state and sufficiently sealing the container when the container is filled with contents. And the spout used for the spout structure can be provided.

(A) is a perspective view of a spout used in the spout structure of one embodiment of the present invention, and (b) is a perspective view of the spout of FIG. 1 (a) viewed from another direction. (A) It is a vertical sectional view showing a spout before being fitted into the opening together with the opening, and (b) a vertical section in a temporary plug state in which the spout is fitted into the opening from the small diameter portion to the boundary with the large diameter portion. It is a top view, (c) is a vertical sectional view in a state where a spout is fitted to a large diameter portion in an opening and a cap is screwed. It is a figure which showed the XX line sectional drawing of the spout, together with the opening of the XX field of view. It is a YY line cross section schematically showing the deformation of the small diameter portion in the vicinity of the rib in the temporarily plugged state.

Hereinafter, the spout structure of the container, which is one embodiment of the present invention, and the spout 1 used in this spout structure will be specifically described with reference to the drawings. The container is made of resin and is used to store liquid. The opening 50 of the container is cylindrical, and a male screw 51 is formed on the outer peripheral surface thereof. A cap 60 is attached to the opening 50 from the outside after the spout 1 which is an inner plug is fitted into the opening 50. The cap 60 has a shape in which one end of a cylindrical peripheral wall is closed, and a female screw 61 is formed on the inner peripheral surface of the peripheral wall. The female screw 61 is screwed with the male screw 51 of the opening 50.

The spout 1 includes a cylindrical spout body 10 and a closing portion 20 that closes at least one end of the spout body 10. In the present embodiment, the closing portion 20 closes the end portion of the spout main body 10 which is the lower end of the spout main body 10 in the direction in which the spout 1 is attached to the opening 50 of the container. The flange portion 30 extends outward from the end portion that is the upper end of the spout main body 10 in this direction, and the ring-shaped ridge 32 projects from the lower surface of the flange portion 30. The ridge 32 has an inverted triangular cross-sectional shape.

The spout body 10 is composed of a plurality of parts having different diameters, and gradually has a large diameter portion 11 and a small diameter portion 12 having a smaller diameter than the large diameter portion 11 from the flange portion 30 side to the closed portion 20 side. It has a reduced diameter portion 13 that becomes smaller. The large diameter portion 11 has neither a protrusion nor a recess on the outer peripheral surface thereof, and the outer diameter R1 of the large diameter portion 11 is larger than the inner diameter R0 of the opening 50. The boundary between the large diameter portion 11 and the small diameter portion 12 is a step portion 15.

The small diameter portion 12 is formed with ribs 12R so as to project from the outer peripheral surface thereof. In this embodiment, there are a plurality of ribs 12R. Each rib 12R extends in a direction parallel to the central axis P of the spout body 10, and the outer surface of the rib 12R is continuous with the outer peripheral surface of the large diameter portion 11. The distance L from the central axis P of the spout body 10 to the outer surface of the rib 12R is larger than the radius (1/2) R0 of the opening 50. In the present embodiment, the distance L from the central axis P to the outer surface of the rib 12R is equal to one half of the outer diameter R1 of the large diameter portion 11. In other words, the diameter of a virtual circle (hereinafter referred to as "rib circumscribed circle") that is on a plane orthogonal to the central axis P of the spout body 10 and circumscribes the outer surface of the plurality of ribs 12R is It is equal to the outer diameter R1 of the large diameter portion 11.

In the present embodiment, the number of ribs 12R is three, and the ribs 12R are provided at equal intervals (120 degrees) with respect to the central axis P of the spout body 10.

Further, in the present embodiment, the outer diameter R1 of the large diameter portion 11 is 102% to 103% of the inner diameter R0 of the opening 50, and the outer diameter R2 of the small diameter portion 12 is 100.8% to 100.8% of the inner diameter R0 of the opening 50. It is set to 101%. Further, the main body of the container, the opening 50, and the cap 60 are made of high-density polyethylene, while the spout 1 is made of low-density polyethylene. The low-density polyethylene spout 1 is more flexible and easily deformed than the high-density polyethylene member.

In the spout 1 oriented so as to be attached to the opening 50 of the container, a ring-shaped pull-up piece 27 is provided on the upper surface of the closing portion 20 as shown in FIG. When removing the spout 1 fitted in the opening 50, if the pull-up piece 27 is pulled with a finger, the operation of removing the spout 1 can be easily performed. In FIG. 2, the pull-up piece 27 is not shown.

When the container is delivered from the manufacturer to the user, the container is shipped with the spout 1 fitted in the opening 50. At this time, as shown in FIG. 2B, the spout main body 10 has an opening 50 from the reduced diameter portion 13 to the small diameter portion 12 to the stepped portion 15 at the boundary between the small diameter portion 12 and the large diameter portion 11. It is in the inserted temporary plug state. Since a plurality of ribs 12R are formed on the outer peripheral surface of the small diameter portion 12, and the diameter of the rib circumscribed circle is larger than the inner diameter R0 of the opening 50, the rib 12R is press-fitted into the opening 50. Since the number of ribs 12R is three, it is easy to center the small diameter portion 12 inside the opening 50 by guiding the ribs 12R, and it is easy to insert the small diameter portion 12 into the opening 50.

When the rib 12R is press-fitted when the small-diameter portion 12 is inserted into the opening 50, as shown schematically in FIG. 4, the rib 12R is pulled inward by the press-fitting so as to be pulled in the vicinity of the rib 12R. The small diameter portion 12 is deformed, and a gap S is formed between the opening 50 and the spout main body 10 in the immediate vicinity of the step portion 15. Further, when the rib 12R is pushed inward, the large diameter portion 11 is also deformed in the vicinity of the rib 12R, which also forms a gap in the immediate vicinity of the step portion 15. Since the inside and outside of the container are ventilated through this gap S, the inside of the container does not become a closed space, and the container expands even if the temperature or atmospheric pressure of the environment in which the temporarily plugged container is placed changes. It is possible to prevent it from denting or denting.

When the user fills the container with a liquid and uses it, the spout 1 is further pushed into the opening 50 so that the entire large diameter portion 11 beyond the step portion 15 is fitted into the opening 50. Since the outer diameter R1 of the large diameter portion 11 is larger than the inner diameter R0 of the opening 50, the outer peripheral surface of the press-fitted large diameter portion 11 is in strong contact with the inner peripheral surface of the opening 50. In addition, by fitting the spout body 10 into the opening 50 up to the large diameter portion 11, the flange portion 30 is pressed against the upper end surface of the opening 50, and a ring-shaped protrusion provided on the lower surface of the flange portion 30. 32 is pressed against the upper end surface of the opening 50 to seal between the flange 30 and the opening 50. The tip of the flange portion 30 is a bent piece 31 bent downward in parallel with the central axis P of the spout body 10, and the distance between the bent piece 31 and the large diameter portion 11 is an opening. Since it is substantially equal to the thickness of the upper end portion of 50, the upper end portion of the opening 50 is fitted at this interval.

The opening 50 is closed by both the close contact between the outer peripheral surface of the large diameter portion 11 and the inner peripheral surface of the opening 50 and the contact between the upper end surface of the opening 50 and the ridge 32 as described above. The container is sealed. Since there are no protrusions or recesses on the outer peripheral surface of the large diameter portion 11, the entire outer peripheral surface of the large diameter portion 11 is in close contact with the inner peripheral surface of the opening 50, so that the container is sufficiently sealed and liquid leakage occurs. It can be effectively prevented. Further, since the large diameter portion 11 that is brought into close contact with the opening 50 when the container is sealed is a portion that is not used in the temporarily plugged state, even if the container is stored for a long time in the temporarily plugged state, the large diameter portion 11 Does not weaken when it is press-fitted into the opening 50.

After closing the opening 50 with the spout 1, the female screw 61 of the cap 60 and the male screw 51 of the opening 50 are screwed together, and the cap 60 is tightened to the opening 50 from the outside of the spout 1. , The closed opening 50 can be protected by the cap 60.

As described above, in the spout structure of the present embodiment, the small diameter portion 12 is deformed in the vicinity of the rib 12R press-fitted into the opening 50 in the temporary plug state, so that the opening 50 is formed in the immediate vicinity of the step portion 15. By forming a gap S between the spout main body 10 and the spout body 10, the inside and outside of the container can be ventilated.

Further, when the container is filled with a liquid, the entire outer peripheral surface of the large diameter portion 11 can be brought into close contact with the inner peripheral surface of the opening 50 to close the opening 50, and the container can be sufficiently sealed. Therefore, even dangerous substances such as strongly acidic liquids and corrosive liquids, which are extremely strictly required not to leak from the container, can be filled in the container.

Although the present invention has been described above with reference to suitable embodiments, the present invention is not limited to the above embodiments, and as shown below, various improvements are made without departing from the gist of the present invention. And the design can be changed.

For example, in the above, the case where the outer diameter R2 of the small diameter portion 12 is slightly larger than the inner diameter R0 of the opening 50 is illustrated, but if the diameter of the rib circumscribed circle is larger than the inner diameter of the opening, the outer diameter of the small diameter portion is open. It may be slightly smaller than the inner diameter of the portion. If the rib can be press-fitted into the opening, the small diameter portion 12 can be deformed in the vicinity of the rib.

Further, in the above, the case where the number of ribs 12R is three is illustrated, but the number of ribs is not limited to this. If the number of ribs is two or less, it is difficult to fit the small diameter portion into the opening, and if the number of ribs is large, the small diameter portion 12 is less likely to be deformed due to the press fitting of the ribs. be.

Further, in the above, the case where the diameter of the rib outer circle and the outer diameter of the large diameter portion are equal is illustrated, but if the diameter of the rib outer circle is larger than the inner diameter of the opening, the diameter of the rib outer circle is set to the large diameter portion. Even if the setting is slightly smaller than the outer diameter, the same effect as described above can be obtained.

1 Mouth plug 10 Mouth plug body 11 Large diameter part (Mouth plug body)
12 Small diameter part (mouth plug body)
12R Rib 20 Closure 50 Opening 51 Male screw 60 Cap 61 Female screw

Claims (3)

A spout having a cylindrical spout body and a closure that closes at least one end of the spout body is the spout structure of the container attached to the opening of the container.
The spout main body has a large diameter portion having an outer diameter larger than the inner diameter of the opening and a small diameter portion having a diameter smaller than the large diameter portion, and the boundary between the large diameter portion and the small diameter portion is a stepped portion. And
While the large diameter portion has neither a protrusion nor a recess on its outer peripheral surface, it has no protrusion or recess.
The small diameter portion has one or more ribs protruding from the outer peripheral surface thereof.
The distance from the central axis of the spout body to the outer surface of the rib is larger than the radius of the opening, and the outer surface of the rib is continuous with the outer peripheral surface of the large diameter portion .
In a temporary plug state in which the rib is inserted into the opening from the small diameter portion to the step portion at the boundary with the large diameter portion, the rib is press-fitted into the opening, so that the small diameter portion is deformed in the vicinity of the rib. At the same time , the large-diameter portion is also deformed in the vicinity of the rib, so that a gap is formed between the spout main body and the opening in the vicinity of the step portion .
A container spout structure characterized in that the opening is closed by further press-fitting the large diameter portion into the opening. The spout structure of a container according to claim 1, wherein the number of ribs is three. It is a spout used for the spout structure of the container according to claim 1.
It comprises a cylindrical spout body and a closure that closes at least one end of the spout body.
The spout body has a large diameter portion and a small diameter portion having a smaller diameter than the large diameter portion.
While the large diameter portion has neither a protrusion nor a recess on its outer peripheral surface, it has no protrusion or recess.
The small diameter portion is a spout having one or more ribs protruding from the outer peripheral surface thereof.

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