JP2023037668A - spout - Google Patents

Abstract

To reliably realize a seal performance of a spout and an inside plug even when a spout body and the inside plug are integrally molded via a score.SOLUTION: A spout includes a spout body 2 being a mouth of a container, an upper lid 4 disposed to cover a spout mouth 3, and an inside plug 5 disposed in the upper lid. The inside plug 5 includes an inside plug top part 14 with an outer peripheral edge hooked on an inner surface of the upper lid, a cylindrical part 15 extending from the inside plug top part 14 to the inside of the spout mouth 3, and an annular flap 16 formed at the outer periphery of the tip of the cylindrical part 15. The flap 16 has a form folded back from the tip of the cylindrical part 15 toward the side of the inside plug top part 14, and has a seal part 18 being in close-contact with an inner peripheral surface of the spout mouth 3 at a tip edge separated from an outer peripheral surface of the cylindrical part 15.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a spout, and relates to a technique for integrally molding an inner plug and a spout body.

Conventionally, this type of spout is disclosed in Patent Document 1, for example. This relates to spouts for bag-like containers. The spout of the bag-like container includes a welded portion attached to the container, a cylindrical spout portion communicating with the inside of the bag-like container, and a stopper closing the end of the spout. It is connected to the end of the part through a breakable thin part.

The stopper body is welded to the cylindrical portion connected to the end of the spout via the thin wall portion, the knob flange closing the end surface of the cylindrical portion and extending outward from the cylindrical portion, and the welding portion. It has a plate-like projection extending along the flat direction of the bag-like container.

Moreover, the cap described in Patent Document 2 is attached to the mouth of the container body, and includes an inner plug and an overcap. The inner plug has a planned opening portion, a fitting portion, and a pouring tube portion, and the fitting portion and the pouring tube portion constitute a body portion of the inside plug. Of the inner plug, the portion to be opened is also a separation portion having a cylindrical appearance with a bottom surface, and is cut along the score when the plug is first opened, and is a horizontal opening formed on the inner peripheral side of the fitting portion. The opening is formed by cutting the planned opening from the wall and leaving the horizontal wall.

JP 2014-73858 WO2007/126062A1

In many general spouts, a spout body that serves as the mouth of the container and an inner plug that closes the mouth of the spout are integrally formed via a score. When the spout is opened, the inner plug is separated from the spout by breaking the score, and after opening, the cylindrical body of the inner plug is inserted into the spout to close the spout. In this closed state, the outer peripheral surface of the trunk portion of the inner plug is brought into close contact with the inner peripheral surface of the spout port to exhibit sealing performance.

When integrally molding the spout body and the inner plug, the mold for resin molding consists of an inner mold corresponding to the inner surfaces of the spout and the inner plug, and an outer mold corresponding to the outer surfaces of the spout and the inner plug. The outer mold is a split mold in order to avoid undercuts that hinder removal of the molded product.

For this reason, a parting line is formed along the parting surface of the mold on the outer surface of the molded product.

In the case of a structure in which the outer peripheral surface of the body of the inner plug is in close contact with the inner peripheral surface of the spout to ensure sealing performance, the parting line formed on the outer peripheral surface of the body of the inner plug extends inside the spout. It becomes a factor that inhibits close contact between the peripheral surface and the outer peripheral surface of the body of the inner plug, and the sealing performance is impaired.

The present invention solves the above problems, and provides a spout capable of achieving reliable sealing performance between the spout and the inner plug even when the spout body and the inner plug are integrally formed via a score. intended to

In order to achieve the above object, the spout according to the present invention has a spout body that serves as the mouth of a container, an upper lid that covers the spout mouth, and an inner plug that is placed in the upper lid. It has an inner spout portion whose outer peripheral edge is engaged with the inner surface of the upper lid, a cylindrical portion extending from the inner spout portion to the inside of the spout, and an annular flap formed on the outer periphery of the tip end of the cylindrical portion. It is characterized by having a shape folded back from the tip of the tubular portion toward the top portion of the inner spout, and having a sealing portion that is in close contact with the inner peripheral surface of the spout on the tip edge that is separated from the outer peripheral surface of the tubular portion. .

The spout according to the present invention has a spout body that serves as the mouth of a container, an upper lid that covers the spout mouth and is screwed to the spout body, and an inner plug that is molded integrally with the spout body and arranged in the upper lid. The inner spigot has an inner spigot portion whose outer peripheral edge engages the inner surface of the upper lid, a tubular portion extending from the inner spigot portion toward the spout mouth, and an annular flap formed on the outer periphery of the tip of the tubular portion. The flap extends from the tip of the cylindrical portion toward the opening edge of the spout, the tip edge of the flap connects to the opening edge of the spout via a score, and the flap tip has a seal portion on the inner surface. do.

The spout according to the present invention is characterized in that the flap has a constricted portion at the boundary between the flap base and the tip of the tubular portion on the same side as the outer peripheral surface of the tubular portion.

The spout according to the present invention is characterized in that the flap has a constricted portion on the same side as the inner peripheral surface of the cylindrical portion on the flap base side following the seal portion.

In the spout according to the present invention, the upper lid and the spout body are screwed together to push the tubular portion and the flap into the spout mouth, fold the flap toward the top portion of the inner plug, and insert the inner surface of the tip of the flap into the tubular portion. The score is broken by reversing from the inner surface side to the outer surface side to bring the seal portion into close contact with the inner peripheral surface of the spout opening.

The method for manufacturing a spout according to the present invention includes: forming an inner plug integrally with a spout body that serves as the mouth of a container; By screwing the spout body together, the top part of the inner spout where the outer edge of the inner spout is engaged with the inner surface of the upper lid, the tubular part extending from the top part of the inner spout toward the spout, and the spout opening from the tip of the tubular part. The annular flap that expands toward the opening edge is pushed in together, and with the tip edge of the flap connected to the opening edge of the spout opening via the score, the tubular portion and the flap are pushed into the spout opening, and the flap is pushed inward. While folding back toward the spout, the inner surface of the tip of the flap is reversed from the inner surface side to the outer surface side of the cylindrical portion to bring the seal portion formed on the inner surface of the tip of the flap into close contact with the inner peripheral surface of the spout opening, and the score is broken. It is characterized by

As described above, according to the spout according to the present invention, the flap has a shape folded back from the tip of the cylindrical portion toward the inner plug top portion, and the spout opening is formed at the tip edge separated from the outer peripheral surface of the cylindrical portion. Since it has a seal part that is in close contact with the inner peripheral surface, the flap can be easily elastically deformed, and the elastic force allows the seal part to be reliably brought into close contact with the inner peripheral surface of the spout port, resulting in excellent sealing performance between the spout and the inner plug. can be achieved with certainty.

By pushing the cylindrical part and the flap into the spout mouth with the tip edge of the flap connected to the opening edge of the spout mouth via the score, the flap is folded back toward the top part of the spout, and the flap is opened. The inner surface of the tip is reversed from the inner surface side to the outer surface side of the cylindrical portion, and the seal portion comes into close contact with the inner peripheral surface of the spout port.

Therefore, when the spout body and the inner plug are integrally molded, the sealing part corresponds to the integral inner mold that is not a split mold, and the parting line that hinders the sealing performance is not formed in the sealing part, ensuring a reliable seal between the spout and the inner plug. performance can be achieved.

FIG. 2 is a half sectional view showing a state after setting the spout according to the embodiment of the present invention; FIG. 2 is a half sectional view showing a state before the spout according to the same embodiment is set; Enlarged view of the seal portion according to the same embodiment A top view of a spout according to the same embodiment. Bottom view of the spout according to the same embodiment

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a spout according to the present invention will be described with reference to the drawings.
(Spout configuration)
1 to 5, the spout 1 includes, for example, a spout body 2 that serves as the mouth of a bag-like container (not shown), a top lid 4 that covers the spout mouth 3 formed in the spout body 2, and a top lid 4. It has an inner plug 5 arranged inside.

The spout body 2 has a discharge portion 7 having a male thread 6 formed on its outer peripheral surface and a welding portion 8 for connecting to a container.

The upper lid 4 has knurls 9 on its outer peripheral surface, female threads 10 on its inner peripheral surface, and is screwed to the spout body 2 with male threads 6 and female threads 10 . An internal plug holding portion 11 for holding the internal plug 5 is provided on the inner end side of the upper lid 4 . The inner plug holding portion 11 protrudes radially inward of the upper lid 4, and the surface facing the opening side of the upper lid 4 forms a gently inclined surface 12. It engages with the spigot 5 .

The inner plug 5 is resin-molded integrally with the spout body 2, and has an inner spout top portion 14 in which the outer peripheral edge 13 is engaged with the inner plug holding portion 11 on the inner surface of the upper lid, and a spout opening 3 extending from the inner spout top portion 14. It has a tubular portion 15 extending inward and an annular flap 16 formed on the outer circumference of the distal end of the tubular portion 15 .
(state before setting)
As shown in FIG. 2 , before the spout 1 is set, the flap 16 spreads from the tip of the tubular portion 15 toward the opening edge of the spout opening 3 , and the tip edge of the flap extends toward the spout opening 3 via the score 17 . , and has a seal portion 18 on the inner surface of the tip of the flap.

In addition, the flap 16 has a first constricted portion 19 at the boundary between the flap base and the tip of the tubular portion 15 on the same side as the outer peripheral surface of the tubular portion 15 , and the inner peripheral surface of the tubular portion 15 The same side surface has a second constricted portion 20 on the flap base side following the seal portion 18 . The seal portion 18 and the second constricted portion 20 are shaped so as not to be undercut.

A sealing band 21 is connected to the open end side of the upper lid 4 via a bridge 22 . The sealing band 21 is loosely fitted to the discharge portion 7 and has an engaging portion 23 on its inner peripheral surface.

The spout body 2 has an engaged portion 25 on the outer circumference of the base portion of the discharge portion 7 . The engaging portion 23 of the sealing strip 21 and the engaged portion 25 of the spout body 2 engage with each other in the axial direction of the spout body 2 to lock the sealing strip 21 .
(Set process)
The upper lid 4 and the discharge portion 7 of the spout body 2 are screwed together to move the upper lid 4 and the sealing band 21 toward the base of the discharge portion 7 . The upper lid 4 engages the inner plug top portion 14 at the inclined surface 12 of the inner plug holding portion 11 on the inner peripheral surface, presses the inner plug 5 in the axial direction of the spout body 2, and the cylindrical portion 15 and the flap 16 is pushed into the spout port 3.

In addition, when the inner plug holding portion 11 on the inner peripheral surface of the upper lid 4 climbs over the outer peripheral edge of the inner plug top portion 14, the inner end surface 4a of the upper lid 4 contacts the top surface 14a of the inner plug top portion 14, The plug 5 is pressed in the axial direction of the spout body 2 to push the tubular portion 15 and the flap 16 into the spout opening 3 .

Since the flap 16 is pressed in the axial direction of the spout body 2 in a state where the tip edge of the flap is connected to the opening edge of the spout port 3 via the score 17, the tip of the flap stays at the current position while the cylinder The flap base connected to the shaped portion 15 is pushed into the spout opening 3 together with the tubular portion 15 . At this time, the first constricted portion 19 and the second constricted portion 20 facilitate elastic deformation of the flap 16 .

As a result, the annular flap 16 extending from the tip of the tubular portion 15 toward the opening edge of the spout 3 can be folded back toward the inner top portion 14 , so that the inner surface of the tip of the flap is the tubular portion 15 . Flip from the inner side to the outer side. Then, the seal portion 18 formed on the inner surface of the tip of the flap comes into close contact with the inner peripheral surface of the spout opening 3, and the score 17 is broken.
(state after setting)
As shown in FIG. 1, in the state after the spout 1 is set, the flap 16 has a shape folded back from the tip of the cylindrical portion 15 toward the inner plug top portion 14 side. The tip of the flap is separated from the outer peripheral surface of the tubular portion 15 , and the seal portion 17 at the tip edge of the flap receives the elastic force of the flap 16 to extend inside the spout opening 3 . Adhere to the surrounding surface. At this time, the existence of the second constricted portion 20 facilitates the elastic deformation of the tip of the flap, so that the sealing performance of the seal portion 17, which is in close contact with the inner peripheral surface of the spout port 3, can be sufficiently ensured.

In addition, the upper lid 4 has an inner plug holding portion 11 that overcomes the inner plug top portion 14 due to elastic deformation of the outer peripheral edge of the inner plug top portion 14 and is externally fitted to the tip of the discharge portion 7 of the spout body 2 . The back end surface 4a abuts on the top surface 14a of the inner spout top portion 14, presses the inner spout top portion 14 against the opening edge of the spout opening 3, and closes the spout opening 3 with the inner spout top portion 14.

Further, the sealing band 21 is loosely fitted to the base of the discharge portion 7 and the engaging portion 23 reaches a position where the engaged portion 25 is overcome.
(When opened)
When the upper lid 4 is rotated in the opening direction, the upper lid 4 moves away from the spout body 2 , and the engaging portion 23 of the sealing band 21 and the engaged portion 25 of the spout body 2 are aligned with the axis of the spout body 2 . In addition, the top cover 4 moves in the direction of separating from the spout main body 2, and the bridge 22 is broken.

Further, when the upper lid 4 is moved away from the spout body 2 by loosening the screw connection, the inner plug holding portion 11 is engaged with the outer peripheral edge of the inner plug top portion 14, and the inner plug 5 is attached to the spout body 2 together with the upper lid 4. , and the flap 16 pulls out from the spout opening 3 while maintaining the folded shape to open the plug.

1 spout 2 spout main body 3 spout opening 4 upper lid 4a inner end surface 5 inner plug 6 male screw 7 discharge part 8 welding part 9 knurl 10 female screw 11 inner plug holding part 12 inclined surface 13 outer peripheral edge 14 inner plug top 14a top surface 15 Cylindrical portion 16 Flap 17 Score 18 Seal portion 19 First constricted portion 20 Second constricted portion 21 Seal band 22 Bridge 23 Engaging portion 25 Engaged portion

Claims (6)

It has a spout body that serves as the mouth of the container, a top lid that covers the spout mouth, and an inner plug that is located inside the top lid,
The inner spigot has an inner spout portion whose outer periphery is engaged with the inner surface of the upper lid, a cylindrical portion extending from the inner spout top portion to the inside of the spout, and an annular flap formed on the outer periphery of the tip of the cylindrical portion. ,
The flap has a shape folded back from the tip of the tubular portion toward the top portion of the inner plug, and has a sealing portion that is in close contact with the inner peripheral surface of the spout on the tip edge that is separated from the outer peripheral surface of the tubular portion. Characterized spout. A spout body that serves as the mouth of the container, an upper lid that covers the spout mouth and is screwed to the spout body, and an inner plug integrally molded with the spout body and arranged in the upper lid,
The inner spigot has an inner spigot portion whose outer peripheral edge is engaged with the inner surface of the upper lid, a tubular portion extending from the inner spigot portion toward the spout mouth, and an annular flap formed on the outer periphery of the tip of the tubular portion. ,
The spout is characterized in that the flap spreads from the tip of the tubular portion toward the opening edge of the spout opening, the flap tip edge is connected to the opening edge of the spout opening via a score, and the flap tip inner surface has a seal portion. . 3. The spout according to claim 1, wherein the flap has a constricted portion at the boundary between the flap base and the tip of the tubular portion on the same side as the outer peripheral surface of the tubular portion. 3. The spout according to claim 1, wherein the flap has a constricted portion on the same side as the inner peripheral surface of the cylindrical portion on the flap base side following the seal portion. The upper lid and spout body are screwed together to push the tubular part and flap into the spout mouth, fold the flap toward the top of the middle spout, and flip the inner surface of the tip of the flap from the inner surface of the tubular part to the outer surface. 3. The spout according to claim 2, wherein the seal portion is brought into close contact with the inner peripheral surface of the spout opening by moving the opening to break the score. An inner plug is integrally formed with a spout body, which is the mouth of the container, and the inner plug is placed inside the upper lid that covers the spout mouth and is screwed to the spout body. , an inner spout portion whose outer peripheral edge engages the inner surface of the upper lid, a cylindrical portion extending from the inner spout portion toward the spout, and an annular flap extending from the tip of the cylindrical portion toward the opening edge of the spout. The cylindrical part and the flap are pushed into the spout in a state in which they are pushed together and the leading edge of the flap is connected to the opening edge of the spout via the score, and the flap is folded back toward the top of the inner plug, A method for manufacturing a spout, characterized in that the inner surface of the tip of the flap is reversed from the inner surface to the outer surface of the cylindrical portion, and the sealing portion formed on the inner surface of the tip of the flap is brought into close contact with the inner peripheral surface of the spout opening to break the score.

Images