JPH0735166B2 - Container spout - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container spout used for a container such as a carton or a bottle.

[0002]

2. Description of the Related Art Conventionally, as a spout of a container, one provided with a metal foil below the spout is known. An example thereof is JP-A-57-77455. In this prior art, a synthetic resin tubular body is provided with a synthetic resin stopper, and a metal disk having a synthetic resin layer on both sides is provided on the lower surface of the stopper. The peripheral end is housed in a recess formed inside the lower portion of the tubular body. In this case, the depth of the recess is formed to be equal to the thickness of the disc. Then, the lower surface of the disc is heated by, for example, high frequency. The thin plastic layer underneath the tubular body then bridges the ends of the disc and wraps the ends of the disc.

[0003]

However, the above-mentioned prior art has the following drawbacks. It is generally formed in a circular recess, and when accommodating a disc, the recess is formed to have a slightly larger diameter. Therefore, it is inevitable that a gap is formed between the recess and the disc. The thickness of the disc and the depth of the recess are formed to be the same, and even if high frequency induction heating is applied to the disc in this state, the flat portion of the disc is welded, but the end portion of the disc is The vertical surface of is not welded. Therefore, even if the lower surface of the tubular body and the lower surface of the disk are bridged by the thin plastic layer as described above, if there is an incomplete portion in this thin bridge portion, from this portion, the disc The liquid content in the container may come into contact with the vertical surface of the container, and the contact with the metal may have an adverse effect.

The present invention has been made to solve such a problem, and its object is to eliminate the risk of contact between the vertical surface of the disk and the liquid content of the container as in the prior art. The purpose is to provide a spout for the container.

[0005]

The present invention which achieves the above-mentioned object is described as follows. It is a main body of a spout formed by a casting cylinder 1 integrally provided on a mounting portion 9 made of a synthetic resin to be mounted on a container. 1a: Mouth wall integrally provided inside the main body 1a and having an endless fissure groove 3: Tearable part 12 provided in the pouring tube 1 on the mouth wall 3: Mouth wall Three
A vertical surface 1b formed in a cylindrical shape below: a metal sheet provided on the lower surface of the mouth wall 3 and having its end side surface 4a in contact with the inner surface of the main body 1a and having a synthetic resin layer a on a good surface. 4: an annular and substantially plate which is located below the metal sheet 4 and which protrudes radially inward above the vertical surface 1b and is welded to the synthetic resin layer a on the lower surface of the metal sheet 4. A tongue piece 7 in the shape of: is a spout of a container.

[0006]

Since the present invention is configured as described above, in the case of manufacturing this spout, from the lower surface of the tongue piece 7,
For example, when pressed while being heated by a high frequency device or the like, the tongue piece 7 is melted and welded to the resin layer a on the lower surface of the metal sheet 4. In this case, unlike the case of the prior art, the tongue piece 7 has the tongue piece 7 and the tongue piece 7 has a thickness, so that the melted portion is the metal sheet 4 and the main body 1a.
You can expect to get into the gap with. The reason is that even if the inflow occurs, the thickness of the tongue piece 7 only needs to be reduced. In this way, the lower surface of the metal sheet 4 can be formed completely liquid-tight, and the metal sheet 4 can be formed.
The molten resin of the tongue piece 7 can be expected to enter the gap between the main body 1a and the main body 1a, and a substantially complete liquid blocking structure can be obtained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 9 is a mounting portion made of synthetic resin, which is to be mounted on a container, 1 is a pouring cylinder integrally formed with this, and 1a is a main body of a pouring outlet formed by the both 9 and 1. Indicates. Reference numeral 3 denotes a mouth wall, which has an endless fissure 2 and is provided in the main body 1a. Reference numeral 12 is a tearing member provided on the mouth wall 3 and inside the casting cylinder 1, and 4 is a metal sheet provided on the lower surface of the mouth wall 3, and the metal sheet 4 is formed as shown in FIG. Has been done. In the figure, c is a metal foil such as aluminum foil, b is an adhesive layer, and a is a synthetic resin layer. Next, 5 is a peripheral end portion of the metal sheet, and its side end surface 4a is provided in contact with the inner surface of the main body 1a. Next, 7 is a position below the metal sheet 4, and is an annular tongue piece that is integrally projected inward in the radial direction above the vertical surface 1b, and its upper surface is on the lower surface of the mouth wall 3. It is attached.

Since the spout is constructed as described above, in manufacturing, when the lower surface of the tongue piece 7 is heated upward while being pressed by a high frequency device or the like in FIG. 1, the tongue piece 7 is heated. , Is melted while being in contact with the synthetic resin layer a on the lower surface of the metal sheet 4, and is welded to the resin layer a. In this case, the portion of the tongue piece 7 corresponding to the gap between the metal sheet 4 and the main body 1a can be expected to fill the above gap if it is melted. Since this melts into the resin layer a, it is clear that the resin also melts in the portion corresponding to the gap, and in such a case, it is clear that the above-mentioned melted portion enters the gap. In this way, the peripheral edge portion 5 of the metal sheet 4 is almost completely closed. Note that FIG. 2 shows the case where the metal sheet 4 is not yet provided on the body of the container. The manufacturing of this spout will be performed as shown in FIGS. 2 to 7. First, the metal sheet 4 shown in FIG. 3 is attached to the lower surface of the mouth wall 3 of the spout shown in FIG. 2 as shown in FIG.

Reference numeral 6 shown in FIG. 2 is an overhang portion. As shown in FIG. 5, the portion 6 is deformed from its lower surface by an ultrasonic device 13 as shown in FIG. Formed in a piece 7. Next, the tongue 7 is heated while being pressed by the high frequency device 14. Thus, the tongue 7 is the first
As shown in the figure, while being welded to the synthetic resin layer a on the lower surface of the metal sheet 4, the peripheral end portion 5 of the metal sheet 4 is closely included by the three members of the tongue piece 7, the inside of the main body 1a and the lower surface of the mouth wall 3. It

[0010]

As described above, according to the present invention, the lower surface of the tongue piece 7 is pressed against the tongue piece 7 in the opposite direction while being heated by a high frequency wave or the like in the manufacturing process. The synthetic resin layer a on the lower surface of the metal sheet 4 can be sufficiently welded and the melted tongue piece 7
However, in the portion corresponding to the gap between the side end surface 4a of the metal sheet 4 and the main body 1a, the molten portion can be expected to flow into the gap. The reason for this is that even if the inflow occurs, the thickness of the tongue 7 only needs to be reduced.

As a result, the peripheral end portion 5 of the metal sheet 4 can be almost completely shielded from the liquid. Further, as another effect, it is impossible to firmly grasp the tearing member 12 and apply a strong force to the tearing member 12 in the narrow pouring tube 1 because of the narrow space, but at the pouring outlet, the metal sheet 4
By providing the crack groove 2, it is possible to form the crack groove 2 sufficiently thin without concern about gas permeation of the crack groove 2.
By doing so, the tearing member 12 can be pinched in the narrow first-stage injection cylinder 1 and the tear groove 2 can be torn very easily with a weak force.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a cross-sectional view of a spout of a container.

FIG. 2 is a half sectional view of a semi-finished product of the pouring outlet.

FIG. 3 is a sectional view of a part of the pouring outlet.

FIG. 4 is a view showing an embodiment of the present invention and showing a first step in manufacturing a container spout.

FIG. 5 is a diagram showing a second stage in manufacturing the spout of the container as well.

FIG. 6 is a diagram showing a third step in manufacturing the spout of the container as well.

FIG. 7 is a diagram showing a fourth step in the manufacturing of the spout of the container.

[Explanation of symbols]

 1 Pour cylinder 1a Pour main body 1b Vertical surface 2 Fissures 3 Mouth wall 4 Metal sheet 4a End side surface 7 Tongue piece 9 Attachment part a Synthetic resin layer

Claims (1)

[Claims] 1. A spout body 1a formed by a spout 1 integrally formed with a synthetic resin mounting portion 9 mounted on a container: an endless body integrally provided inside the main body 1a. Mouth wall 3 having fissures 2: On the mouth wall 3, a tear member 12 provided in the casting cylinder 1: below the mouth wall 3 in a cylindrical shape
Formed vertical surface 1b : Metal sheet 4 provided on the lower surface of the mouth wall 3 and having its end side surface 4a in contact with the inner surface of the main body 1a and having a synthetic resin layer a on both sides thereof: the metal
An annular and substantially plate-shaped tongue piece which is located below the sheet 4 and which protrudes radially inward above the vertical surface 1b and is welded to the synthetic resin layer a on the lower surface of the metal sheet 4. 7: A spout of a container, characterized in that it consists of: