JPH0930551A - Pouring outlet for liquid container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a pouring outlet easily opening and unsealing a cover by enlarging the stroke of an unsealing blade by use of a simple structure and automatically stick a sealing film by the unsealing blade when opening the cap and prevent the unsealing blade from rising and tearing off the sealing film when closing the cap. SOLUTION: A vertical rib 15 preventing rotation is provided at the inside face of a pouring outlet body 10 and a recessed groove 25 having the same direction with the outer screw 14 of the pouring outlet body 10 and a larger pitch than the screw is provided at the outside of the inner cylinder 24, and a circular protrusion 26 is provided at the inside face of the top plate 21, in the cap 20. A fixing protrusion 33 fitting to the vertical rib 15 of the pouring outlet body 10 is provided at the outside face of the unsealing blade 30 and a protruded part 34 fitting to the recessed groove 25 of the inner cylinder 24 of the cap 20 is provided at the inside face. A separation part separating the unsealing blade 30 pushed down, from the cap is provided between the vertical rib 15 at the inside face of the pouring outlet body 10 and the endface of the fitting side of container.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid container spout.

[0002]

2. Description of the Related Art As a synthetic resin spout to be attached to a pouring opening of a paper container such as a Goebel top type for containing a liquid, for example, as disclosed in Japanese Utility Model Publication No. 64-23475, a tubular shape Is known, which has an outlet main body, a cap, and an opening blade that is housed in the outlet main body and protrudes toward the container side in association with the opening operation of the cap and breaks through the sealing film in the container opening. Actual exploitation 64-2347
The spout described in Japanese Patent Publication No. 5 has a threaded portion in which the outer thread having a larger pitch is cut in the same direction as the screw of the spout main body, and the cap top plate rear surface is provided with a protruding needle (opening blade). And the engaging portion for preventing rotation of the breakthrough needle is formed between the breakthrough needle and the spout body.

[0003]

In the spout described in the above publication, the opening blade and the cap are connected by screwing the outer screw and the inner screw, and since the contact area of the screwed portion is large, friction is generated. It is large and slippery, and the stroke of the opening blade does not become much larger than the stroke of the opening operation of the cap, so in order to ensure the stroke of the opening blade that can pierce the sealing film securely, It is necessary to lengthen the screw of the threaded portion with the outlet body, which causes a problem that it takes time to open and open the lid, and the cost is high. Further, in the case of the conventional spout, the opening blade that broke through the sealing film in conjunction with the opening operation of the cap does not drop as it is but rises to the original position when the cap is closed. . Then, there is a problem that the sealing film is torn off by being entangled with the ascending opening blade, and the sealing film blocks the spout, thereby impairing the output of the content or discharging the content mixed with the content. In addition to the spout described in the above publication, a spout for a liquid container in which the opening blade can be operated in conjunction with the opening operation of the cap is known, but both have a complicated structure and are costly. There was such a problem.

The present invention is intended to solve such a problem, has a simple structure, is easy to open and open the lid, and operates in the opening direction once in conjunction with the opening operation of the cap. It is an object of the present invention to provide a pouring spout for a liquid container, which can cut off the opening blade from the cap and completely push it down.

[0005]

A liquid container spout according to the present invention comprises a spout body having a cylindrical spout portion, a cap attached to the cylindrical spout portion of the spout body, and the spout body. In a spout for a liquid container consisting of a tubular opening blade to be mounted on the inside of, a rotation preventing means for preventing relative rotation between them is provided between the spout body and the opening blade, and the cap has an outer cylinder. An inner tube portion that is concentric with the outer tube portion and that forms an interval capable of accommodating the opening blade, and is fitted to each other between the inner tube portion of the cap and the opening blade. A convex portion having a roundness, and having a roundness, and comprising a concave groove portion that is inclined from the upper end to the lower end of the inner surface of the opening blade or the outer surface of the inner cylindrical portion of the cap, the opening blade of the cap Interlocking to move so as to project to the container mounting side with the opening operation Characterized in that a engagement means.

Here, the pitch of the concave groove portion forming the interlocking engagement means may be larger than the axial movement distance of the opening blade. The convex portion and the concave groove portion forming the interlocking engagement means may be in the same direction as the cap fitting screw on the outer surface of the spout body and have a pitch larger than that. By doing so, the opening blade can be lowered to the thrusting position within one lap.

Further, as rotation preventing means, a plurality of vertical ribs extending parallel to the central axis on the inner surface of the spout body from a predetermined position near the end surface of the outlet side of the cylindrical spout to a predetermined position near the end surface of the container mounting side. And an engaging projection that engages with the vertical rib can be provided on the outer surface of the opening blade.

Further, between the vertical rib on the inner surface of the spout body and the end surface on the container mounting side, the opening blade has a larger axial dimension than at least the engaging projection on the outer surface of the opening blade, and the opening blade is projected to a predetermined position on the container mounting side. In this state, a separating portion that separates from the cap by disengaging the interlocking engaging portion and separating from the vertical rib can be provided.

In the liquid container pouring spout of the present invention, first, the opening blade is inserted into the spout main body from the outlet side. Then, the cap is tightened while the engagement protrusion on the outer surface of the opening blade is held on the outlet side of the vertical rib on the inner surface of the spout body. This completes the set of spouts. Then, this spout is fixed around the opening of the container body to which the sealing film is attached by a method such as ultrasonic sealing.

When the cap is loosened, the pouring spout attached in this manner is pushed in the axial direction toward the container mounting side in conjunction with the opening blade, and the blade tip pierces the sealing film. At that time, the cap and the opening blade are interlocked by the engagement of the rounded convex part and the rounded concave groove part, and the contact area of the interlocking part is small and friction is small, so slipping is good and opening is smooth. is there.

Here, the convex portion and the concave groove portion forming the interlocking engagement means can be formed in the same direction as the cap fitting screw on the outer surface of the spout main body and with a larger pitch, and moreover, with the cap. The stroke of the opening blade can be set to a sufficient value without lengthening the screw of the screwing portion with the spout body unnecessarily, which does not increase the cost.

Further, a plurality of vertical ribs are provided on the inner surface of the spout body, the vertical ribs extending parallel to the central axis from a predetermined position near the end surface of the outlet side of the cylindrical spout to a predetermined position near the end surface of the container mounting side.
An engaging protrusion that engages with the vertical rib is provided on the outer surface of the opening blade,
Between the vertical rib on the inner surface of the spout body and the end surface on the container mounting side,
At least the axial dimension is larger than the engaging protrusion on the outer surface of the opening blade, and the opening blade is separated from the vertical rib while protruding to the predetermined position on the container mounting side, and the engaging portion for interlocking is disengaged from the cap. If a disconnecting part is provided,
When the cap is loosened and removed from the spout body, the opening blade falls to the position where the interlocking engagement with the inner tube part of the cap is disengaged and the engagement protrusion on the outer surface and the vertical rib on the inner surface of the spout body are disengaged. . Further, in this state, since the unsealing blade is not restrained in the rotation direction, the phase of the engaging projection on the outer surface and the vertical rib on the inner surface of the spout main body easily shifts. Therefore, even if the cap is subsequently closed, it is possible to prevent the opening blade from ascending and tearing off the sealing film.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view with a half section of a liquid container spout showing an example of an embodiment of the present invention, and FIG. 2 is a front view with a half section of the spout body of the same example. 2 is a cross-sectional view of the spout body cut along the line AA in FIG. 2, FIG. 4 is a front view showing the cap of the same example in a half section, and FIG. 5 is a front view showing the opening blade of the same example in a half section. Fig. 6, Fig. 6 is a plan view of the opening blade of the same as above, Fig. 7 is a front view of a half section showing a state in the middle of the opening operation of the liquid container spout, and Fig. 8 is the completion of the opening operation of the liquid container spout. It is a front view of a half section showing a state in which a cap is removed.

In this example, the spout 1 is composed of a spout body 10, a cap 20, and an opening blade 30. The spout body 10, the cap 20, and the opening blade 30 are molded products of polypropylene resin, for example.

The spout body 10 comprises a cylindrical spout 11 and a mounting flange 12 formed on the outer periphery of one end thereof. The flange 12 is supposed to have a triple thin annular projection 13 on the end face on the container mounting side during molding.
These annular protrusions 13 form a welded portion when attached to the container body.

An external thread 14 is formed on the spout body 10 at a position close to the flange 12 side on the outer surface of the tubular spout 11. In addition, the flange 1 is provided on the inner surface of the spout body 10.
A vertical rib extending parallel to the axis from a position that is inside by a predetermined dimension from the end surface on the side opposite to 2 (outlet side end surface) to a position that is inside by a predetermined dimension from the end surface on the flange 12 side (container mounting side) A plurality of (for example, 12) 15 are provided at the same intervals. These vertical ribs 15 have a wedge shape in cross section, and one side of the wedge shape constitutes an engaging surface perpendicular to the axial center of the spout body 10 in the same circumferential direction. Further, the end faces of the vertical ribs 15 on the outlet side and the end face on the container mounting side are respectively inclined inward in the axial direction, and the ends of the vertical ribs 15 on the outlet side are hemispherical along the inclined end faces. The protrusion 16 is formed. The hemispherical projection 16 is for locking the opening blade 30 at the set position.

A lock ring 17 is provided on the inner surface of the spout body 10 so as to extend annularly along the end surface on the container mounting side. The locking ring 17 is for locking the opening blade 30 at the pushing-down position.

The cap 20 is composed of a top plate portion 21 and an outer cylinder portion 22, and an inner screw 23 that can be screwed into the outer screw 14 on the outer surface of the spout body 10 is formed on the inner surface of the outer cylinder portion 22. . Further, the cap 20 is concentrically arranged inside the outer tubular portion 22 with a space to accommodate the opening blade 30 in a concentric manner.
Is provided. The outer surface of the inner tubular portion 24 is inclined from the upper end toward the lower end, and the inclination direction is the same as the outer screw 14 of the spout body 10, and the pitch is larger than that.
The concave groove portion 25 having a pitch larger than the axial movement distance of the unsealing blade 30 is formed. The concave groove 25 has a round cross section. In addition, on the inner surface of the top plate portion 21,
An annular protrusion 26 for defining the setting position of the opening blade 30 is provided on the outer side of the inner cylindrical portion 24, and the cap 20 is tightened by abutting on the outer surface of the annular protrusion 26 on the end face of the cylindrical pouring portion 11 of the spout body 10. A plurality of conical protrusions 27 defining the position are provided.

The unsealing blade 30 is provided with a plurality of saw blade-shaped blade tips 32 in an annular arrangement at one end of a cylindrical body 31. The edge 32 has a shape whose height changes depending on the position so that the opening can be smoothly performed. Further, on the outer surface of the other end of the tubular body 31, an engagement protrusion 33 is provided which cooperates with the vertical rib 15 of the spout body 10 to form a rotation preventing engagement portion of the opening blade 30. The engaging projections 33 are also a number (for example, 6) that is an integer fraction of the number of the vertical ribs 15 of the spout body 10, and are also wedge-shaped in cross section, and one side of the wedge shape is the engaging surface of the vertical ribs 15. Opposed to each other, they form an engagement surface perpendicular to the axis of the spout body 10. Further, the cylindrical main body 31 is provided with a convex portion 34 that fits into the concave groove portion 25 of the inner cylindrical portion 24 of the cap 20 on the inner surface. The convex portion 34 has a round cross section. The tubular body 31 of the unsealing blade 30 is provided with hollow portions 35 at four positions so as not to interfere with the convex portion 34. The hollow portion 35 acts as an air port when pouring the liquid.

Between the end face on the outlet side of the inner surface of the spout body 10 and the vertical rib 15, the cylindrical spout portion 11 of the spout body 10 is provided.
The cap 20 is attached to the cap 20, the end surface of the tubular pouring portion 11 abuts on the conical projection 27 on the inner surface of the top plate portion 21 of the cap 20, and the opening blade 30 contacts the annular projection 26 on the inner surface of the top plate portion 21 of the cap 20. In the set state in which the cap 20 is pulled to the abutting position, the top plate portion 21 of the cap 20 and the vertical rib 1
5, which forms a holding portion capable of accommodating the projection 33 on the outer surface of the opening blade 30 between the end surface of the opening blade 5, and the annular projection 26, the conical projection 27, the vertical rib 15 and the hemispherical projection 16. The dimensions are set to define the position.

The vertical ribs 15 on the inner surface of the spout body 10 are also provided.
Between the container and the end surface on the container mounting side constitutes a separating portion for separating the opened opening blade 30 from the cap, and the opening blade 30 has a larger axial dimension than the engaging projection 33 on the outer surface of the opening blade 30. Spout main body 1 protruding to the container mounting side
In the state of being locked by the locking ring 17 of No. 0, the engaging protrusion 33 is separated from the vertical rib 15, and the spiral groove 34 on the inner surface of the opening blade 30 and the external screw 25 of the inner tubular portion 24 of the cap 20.
The dimensions are set so that the engagement with

The spout body 10, the cap 20, and the opening blade 3
0 is assembled in a predetermined process order. That is, first, the opening blade 30 is inserted into the spout body 10 from the outlet side. Then, the engaging projection 33 on the outer surface of the unsealing blade 30 is attached to the spout body 1
The end surface of the vertical rib 15 and the hemispherical protrusion 16 hold the end surface of the vertical rib 15 on the outlet side of the inner surface of the cap 20, and in that state, the cap 20
Tighten. At that time, the opening blade 30 rotates together with the cap 20 and becomes idle around the spout body 10. Then, the spout 1 is brought into a predetermined set state. At this time, as for the opening blade 30, the engaging projection 33 on the outer surface has the top plate portion 21 of the cap 20.
Inner annular protrusion 26, vertical ribs 15 and hemispherical protrusion 16
It is held in the state of being positioned with. Further, the spout 1 has the opening 12 for pouring of the container body 100 in which the flange 12 is set in this way and the flange 12 is shown by a chain double-dashed line in FIG.
It is applied to the periphery of and is fixed by an ultrasonic seal or the like. The container body 100 is, for example, a Gobel-top type liquid container formed of a laminated blank having paper as a main material. The sealing film 102 is welded, and the polyethylene film 103 is covered from the outside of the pouring opening 101 to be welded to the periphery of the opening and the sealing film 102.

In this spout 1, when the cap 20 is loosened, the concave groove portion 25 of the inner cylindrical portion 24 of the cap 20 and the convex portion 34 of the opening blade 30 are engaged with each other, and the vertical rib 15 and the engaging projection are engaged. 33 is engaged and the unsealing blade is guided in the axial direction, the unsealing blade 30 is pushed in the direction opposite to the cap 20 (container mounting side), and the protrusion 33 on the outer surface vertically extends on the inner surface of the spout body 10. The rib 15 is pushed out in the axial direction toward the container mounting side while being engaged with the rib 15. Then, the cutting edge portion 32 has the sealing film 102.
Break through. FIG. 7 reproduces the operation of the opening blade 30 when the cap is opened by using the spout alone before attachment. Further, FIG. 8 shows a state in which the cap 20 is further loosened from the state of FIG. 7 and removed from the spout body 10, and in this state, the opening blade 30 has the convex portion 34 of the concave groove portion 25 of the inner cylindrical portion 24 of the cap 20. From the vertical rib 15 on the inner surface of the spout body 10, and the engaging projection 33 is completely pushed down, so that the engaging projection 33 on the outer surface engages with the locking ring 32. Be stopped.

[0025]

Since the liquid container pouring spout of the present invention is constructed as described above, it is possible to construct a pouring spout that is easy to open and open by increasing the stroke of the opening blade with a simple structure. You can

Further, a plurality of vertical ribs are provided on the inner surface of the spout body and extend parallel to the central axis from a predetermined position near the end face on the outlet side of the cylindrical spout to a predetermined position near the end face on the container mounting side.
An engaging protrusion that engages with the vertical rib is provided on the outer surface of the opening blade,
Between the vertical rib on the inner surface of the spout body and the end surface on the container mounting side,
At least the axial dimension is larger than the engaging protrusion on the outer surface of the opening blade, and the opening blade is separated from the vertical rib while protruding to the predetermined position on the container mounting side, and the engaging portion for interlocking is disengaged from the cap. By providing a disconnection part, when the cap is loosened and removed from the spout body,
The opening blade is disengaged from the interlocking engagement with the inner tube portion of the cap, and is dropped to the position where the engagement protrusion on the outer surface and the vertical rib on the inner surface of the spout body are disengaged. Even if the vertical ribs on the inner surface of the body are out of phase and the cap is closed, the opening blade can be interlocked to move up and tear off the sealing film.

[Brief description of drawings]

FIG. 1 is a front view of a half cross-section of a liquid container pouring spout according to an example of an embodiment of the present invention.

FIG. 2 is a front view of the spout main body of the embodiment of the present invention in a half section.

FIG. 3 shows a spout body of an example of an embodiment of the present invention.
A sectional view taken along line A-A in FIG.

FIG. 4 is a front view showing a half cross section of a cap according to an example of an embodiment of the present invention.

FIG. 5 is a front view in which a half section of an opening blade according to an example of an embodiment of the present invention.

FIG. 6 is a plan view of an opening blade according to an example of an embodiment of the present invention.

FIG. 7 is a front view of a half section showing a state in the middle of an unsealing operation of a liquid container pouring spout according to an example of an embodiment of the present invention.

FIG. 8 is a front view of a half section showing a state where the opening operation of the liquid container pouring opening of the embodiment of the present invention is completed and the cap is removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 spout 10 spout main body 11 cylindrical spout part 14 outer screw 15 vertical rib 17 locking ring 20 cap 22 outer cylinder part 23 inner screw 24 inner cylinder part 25 concave groove part 30 opening blade 32 cutting edge part 33 engagement protrusion 34 Convex

Claims (5)

[Claims] 1. A liquid comprising a spout body having a cylindrical spout portion, a cap attached to the cylindrical spout portion of the spout body, and a cylindrical opening blade mounted inside the spout body. In the container spout, rotation preventing means for preventing relative rotation between the spout body and the opening blade is provided between the spout main body and the opening blade, and the cap is concentric with the outer cylinder part and the outer cylinder part is provided. Providing an inner cylinder part that forms an interval that can store the opening blade,
Between the inner cylindrical portion of the cap and the opening blade, a convex portion having a round shape that fits with each other, and a rounded upper end of the inner surface of the opening blade or the outer surface of the inner cylindrical portion of the cap. And a recessed groove that is inclined toward the lower end from the above, and provided with interlocking engagement means for moving the opening blade so as to project toward the container mounting side with the opening operation of the cap. For spout. 2. The liquid container pouring outlet according to claim 1, wherein the concave groove portion forming the interlocking engagement means has a pitch larger than an axial movement distance of the opening blade. 3. The liquid container according to claim 1, wherein the convex portion and the concave groove portion forming the interlocking engagement means are in the same direction as the cap fitting screw on the outer surface of the spout body and have a larger pitch. Outlet. 4. A plurality of rotation preventing means extending from a predetermined position near an end face of the outlet of the tubular pouring portion to a predetermined position near an end face of the container attachment side in parallel to the central axis on the inner surface of the spout body. 4. The liquid container pouring outlet according to claim 1, wherein the vertical rib is provided, and an engaging protrusion that engages with the vertical rib is provided on an outer surface of the opening blade. 5. The opening dimension is at least larger than the engaging projection on the outer surface of the opening blade between the vertical rib on the inner surface of the spout body and the end surface on the container mounting side, and the opening blade is mounted on the container mounting side. The spout for a liquid container according to claim 4, further comprising: a detaching portion that is detached from the vertical rib while protruding to a predetermined position and disengages from the interlocking engaging portion to detach from the cap.