JPH0231378Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a spout stopper for a liquid-filled paper container, and more specifically, to a positioning structure for a spout plug when fixing the spout plug to the paper container. be.

B. Prior Art In recent years, hollow rectangular prismatic paper containers have been frequently used as storage containers for liquid contents such as alcoholic beverages and fruit juices. The above-mentioned paper container is made by folding a substantially rectangular base paper having a thermoplastic resin coating layer on both the front and back sides.
By joining the folded portions formed by the folding operation using welding of the resin coating layers, a container body having a liquid-tight sealing structure is formed. Usually, the paper container is provided with a spout for dispensing the liquid contents at a suitable position on the container wall, such as the upper wall surface.

FIGS. 1A and 1B are a side view and a plan view of a known pouring stopper similar to the device disclosed in Japanese Utility Model Application Publication No. 57-55719.

In FIGS. 1A and 1B, a spout 1 is composed of a hollow cylindrical spout main body 2 and a cap 3 fitted into the spout main body 2. As shown in FIGS.

The base end of the spout body 2 is connected to the resin coating layer of the paper container P with a flange 4 that functions as a welding member, and the outer periphery of the base end is connected to the welding surface of the flange 4. A predetermined number (three in the figure) of locking pawls 5 are protruded at approximately equal intervals while maintaining a fitting gap between the vessel walls.

An inner wall 8 having a thin groove 7 on the back surface is formed inside the spout 6 formed at the tip of the spout 1, and a removable gourd is provided inside the groove 7. A shaped blind lid 8a is provided.

The blind lid 8a is closed when the spout stopper 1 is opened.
By pulling the pull-top 9 attached to the top 8b of the container, the container is torn along the groove 7 and can function as a spout for pouring out the liquid contents.

In order to provide the liquid contents with a smooth outflow behavior without pulsation, the pouring stopper 1 is arranged such that the large-diameter circular portion of the gourd-shaped blind lid 8a is positioned on the lower side when pouring out the liquid contents. The mounting position must be determined so that the side wall on the large-diameter circular portion side forms the spout 6 which is longer and more inclined than the side wall on the mounting base end 10 side of the pull top 9. Therefore, when attaching the spout 1 to a paper container, the spout 1
It is necessary to adjust the fixing positions of the constituent members so that they can maintain the above-mentioned proper relative arrangement positions.
However, in known paper containers, little consideration is given to holding the constituent members of the pouring stopper 1 in the appropriate positions as described above, and for this reason, it is difficult to maintain a stable pouring state after opening the container. Significant obstacles were recognized in securing this.

That is, as shown in FIG. 2, the spout is inserted into the spout mounting hole H, which has a diameter slightly larger than the base end of the spout main body 2, which is bored in the wall of the paper container P. 1 is
By clamping the vessel wall around the mounting hole H with the flange 4 and the locking pawl 5, a temporary fixing posture is provided in which the paper container P does not fall off.
Since there is no locking member along the circumferential direction of the spout body 2, the locking position of the spout 1 may be changed due to vibrations etc. when the paper container P is transported to the welding process of the flange 4. There were cases where deviations occurred.

B. Purpose of the invention An object of the present invention is to provide a spout stopper for a liquid-filled paper container that has a locking positioning structure that can provide a predetermined attachment position to the spout stopper for a paper container.

C. Structure of the invention The present invention involves inserting the spout body into a mounting hole drilled in a liquid-filled paper container from the inside of the container, and removing the resin coating layer on the inner surface of the container and the base of the spout body. In a device that welds and fixes a flange part connected to an end part, a taper part whose height increases toward the flange side is provided on the outer circumferential surface of the side wall of the spout body, and the base part is attached to the flange. A plurality of ridge-like protrusions are arranged to reach the top of the container, and the protrusion of the spout body locally expands the inner circumferential edge of the mounting hole of the container by its tapered part, so that it engages and locks with the mounting hole. The gist of the present invention is to provide a pouring stopper 20 for a liquid-filled paper container constructed as follows.

D. Example FIGS. 3A and 3B are a side view and a front view of a spout stopper of a liquid-filled paper container according to the present invention.

In addition, in the pouring tap 20 shown in FIGS. 3A and 3B, the same parts as those in the known pouring tap 1 are given the same reference numerals, and a description of their structure and function will be omitted.

In the above-mentioned pouring tap 20, the base end thereof is connected to the flange 4 on the outer circumferential surface of the side wall of the pouring tap main body 2, and the base end thereof is connected to the inner peripheral edge of the mounting hole H drilled in the above-mentioned paper container P. A predetermined number (three in the figure) of ridge-shaped protrusions 21 that slightly bite into the flange 4 are arranged at approximately equal intervals, and the height of each protrusion 21 gradually increases toward the flange 4 side. A tapered portion 22 is formed.

The pouring stopper 20 has an inclined spout in which the large-diameter circular portion of the blind lid 8a is located on the lower side, and the side wall on the large-diameter circular portion side is longer than the side wall on the mounting base end 10 side of the pull top 9. The paper container P is temporarily fixed by inserting it from the inside of the paper container P into a mounting hole H drilled in the paper container P so as to form a shape 3.

In the process of inserting the spout plug 20 into the mounting hole H, the tapered part 22 formed at the tip of each protrusion 21 locally pushes and expands the inner circumferential edge of the mounting hole H. the protrusion 21 into it tightly.

FIGS. 4A and 4B are a front view and a partially cutaway side view showing the state in which the pouring stopper 20 is temporarily fixed to the paper container P.

In FIGS. 4A and 4B, the spout 20 is fitted into the mounting hole H with the ridge-like protrusion 21 slightly biting into the inner peripheral edge of the mounting hole H, and assumes a welding preparation attitude.

In this way, the spout 20 is provided with a reliable locking posture in which it is not displaced in either the circumferential direction or the axial direction by the protrusion 21 provided on the outer peripheral surface of the side wall of the spout main body 2.

After this, the paper container P is connected to the flange 4 and the paper container P
The spout plug 20 and the paper container P are welded into an integral structure without changing their relative fitting positions.

E. Effect of the invention The pouring stopper of the liquid-filled paper container according to the invention is as follows:
By arranging a predetermined number of protrusions on the outer peripheral surface of the side wall of the spout body that engages with the inner peripheral edge of the spout mounting hole, the spout can be accurately positioned without rotating in the circumferential direction. It is locked into the mounting hole of the paper container.

Therefore, the spout is placed in a predetermined fixed position, i.e., the large diameter circular part of the gourd-shaped blind lid is located downward, and the side wall on the large diameter circular part side is longer than the side wall on the mounting proximal end side of the pull top. It is firmly welded to the paper container with a slanted spout formed.

Therefore, after opening, it is possible to ensure that the liquid contents filled in the paper container are poured out stably without pulsation.

As is clear from the above description, the present invention is capable of maintaining the fixed position of the spout stopper relative to the paper container in a state suitable for stabilizing the outflow behavior of the liquid contents, regardless of the presence or absence of the cap. This significantly improves the usability of filled paper containers.

[Brief explanation of the drawing]

Figures 1A and B are side and front views of a known spouting stopper, Figure 2 is a longitudinal sectional view showing the spouting plug inserted into a mounting hole drilled in a paper container, and Figure 3. A and B are a side view and a front view of the spout stopper of the liquid-filled paper container according to the present invention, and FIGS. 4A and B are front views showing the state where the spout stopper according to the present invention is inserted into the above-mentioned mounting hole. and a side view. P... Liquid-filled paper container, H... Mounting hole for spouting stopper, 1, 20... Spouting stopper, 2... Spouting stopper body,
4...Flange, 5, 21...Protrusion, 22...Tapered portion.

Claims (1)

[Claim for Utility Model Registration] A spouting stopper body is inserted from the inside of the container into a mounting hole drilled in a liquid-filled paper container, and the resin coating layer on the inner surface of the container and the base of the spouting stopper body are removed. In a device that is fixed by welding to a flange connected to the end, the outer peripheral surface of the side wall of the spout body is provided with a tapered part whose height increases toward the flange, and the base of the taper is attached to the flange. Arranged with multiple ridge-like protrusions that reach the
A spout stopper for a liquid-filled paper container, characterized in that the protrusion of the spout main body locally expands the inner peripheral edge of the mounting hole of the container by its tapered portion.