JPS5912543B2 - twist off plastic container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in plastic containers known as twist-off containers.

That is, the annular thin-walled portion surrounding the dispensing channel of the container body is replaced by the thin-walled portion. This invention relates to an improvement in a type of container that is ruptured and opened by applying a swinging force that rotates about the container axis to a closed portion that is located above the rim and that blocks the pouring path. An example of the container of the above type will be explained with reference to FIG.

1 is the body of the plastic container, 2 is its shoulder, 3 is 5
The upper flat plate part A of the shoulder is a blockage part that closes the spouting passage 8, which will be described later. The cylindrical portion 6 includes a cylindrical portion 6 located above the cylindrical portion 5, and protruding portion molecules γ that protrude diametrically outward from the cylindrical portion 6 in opposite directions.

Reference numeral 8 denotes a spout passage that passes through the flat plate portion 3 from one side of the body and reaches the closing portion 5, and 9 denotes an annular thin wall portion that surrounds the spout passage 8 and is located between the shoulder portion 2 and the closing portion A. It is.

No kip is used in this container. 15 To open this container, put your finger on the protrusion 7, γ, twist it in the direction of rotation around the axis of the container, and use the twisting force to break the thin wall portion 9.

Even if the part above the thin-walled part 9 is tilted with respect to the axis of the container, for example, even if the cylindrical part 6 is pressed against the cylinder part 6 in a direction perpendicular to the plane of the paper, the closed part 5 will not come into contact with the flat part 3. Since the container does not tilt any further, the thin wall portion 9 can be avoided from breaking, which has the advantage of not causing an unexpected breakage opening, and also has the advantage of being able to prove that the seal has been opened.

F5 This twist-off type, however, has a protrusion T,
7' can be applied to a container large enough to secure a length l that can be applied with a finger and that can apply enough twisting force to break the thin wall part 9. If the diameter of the container body can be only slightly larger than the diameter of the container body, or if the diameter of the container body itself is small, it will not be possible to obtain sufficient twisting force to break the thin wall portion.

The present invention provides a plastic container that makes it possible even when the twist-off method is not applicable as described above. A twist-off plastic container, in which a twisting force rotating around the axis of the container wafer is applied to a closed part that is located above the part and blocks the pouring passage, thereby breaking the thin wall part and opening the container. The container is composed of a container body and a cap, and includes a zenith portion of the cap and a skirt portion that hangs down from the periphery of the zenith portion and engages with the container body, and the zenith portion has a recessed portion. and the closing portion are formed in relative shapes such that the closing portion can be inserted into the recess and rotation of the cap can be transmitted to the closing portion after the insertion, wherein the recess extends outward in the axial direction. A twist-off plastic container is obtained which is characterized in that it is open towards the outside.

An example of the present invention will be explained with reference to the drawings.

Figure 2 is a front cross-sectional view showing the cap screwed onto the container body without the thin wall part broken, Figure 3 is a perspective view of Figure 2 with the cap removed, and Figure 4 is a plan view of the cap. It is.

In these figures, B is the plastic container body, 12 is the shoulder of the container body B, 13 is the neck, 13' is an annular flat plate at the upper end of the neck, 14 is a screw, and 15 closes the spouting passage 18. The closed portion consists only of a rectangular planar closed portion as shown in FIG.

Reference numeral 18 denotes a spout passage that passes through the annular flat plate portion 13' and slightly enters the closed portion 15, and 19 denotes a thin wall portion that surrounds the spout passage 18 and is located between the closed portion 15 and the annular flat plate portion 13'. be.

On the other hand, a cap C is made separately from the container body B, and this cap C consists of a zenith part 21 and a skirt part 22 hanging down from the periphery of the zenith part 21, and the zenith part 21 extends outward in the axial direction of the cap C. and the closed portion 15
The recess 25 has a similar planar shape to the closed portion 15 and is slightly larger than the closed portion 15.

Note that 24 is a threaded portion. The diameter of the body of the container in this specific example is 161! , the pouring path diameter d is 3 um, the thin part thickness t
is 0.7n, the rectangle of the closed part 15 is 6mm x 411, and the outer diameter of the skirt part of the cap is 12w! I, recess 2
5 rectangle is 6.2 dew x 4.2 m7! ! It is.

To open the container of this specific example, insert the cap C into the container body B.
Remove the cap from the container body, turn the cap C upside down, cover the cap so that the closed part 15 of the container body is inserted into the recess 25, and then grasp the cap with your fingers in the same way as when removing the cap from the container body. , just twist it.

Then, the closed part 15 in the recess 25 of the cap
is twisted, and the thin portion 19 is broken. In the above specific example, the planar shape of the closing portion 15 is rectangular, but any shape such as a triangle or a pentagon may be used as long as it can be inserted into the recess 25 of the cap and rotated together with the cap.

Further, the shape of the recessed portion 25 of the cap is not limited to a shape similar to the closed portion as shown in the above specific example.
Any shape may be used as long as the closed portion can be inserted and the rotation of the cap can be transmitted to the closed portion, such as a rectangular closed portion and a cross-shaped cap recess formed by overlapping the rectangles.

According to the present invention, a container is constituted by a container body and a cap, and the cap is composed of a top portion and a skirt portion,
The zenith portion has a concave portion that opens outward, and the closed portion of the container body and the concave portion of the cap are such that the closed portion is inserted into the concave portion and is engaged with the concave portion to transmit rotation of the cap. Since the diametrical length of the closed portion is small, even if you put your fingers on the closed portion and apply a twisting force, it is not possible to obtain enough twisting force to break the thin walled portion. Even if the container is small, by rotating the cap, which is larger in diameter than the closed part and can easily transmit finger force, it is possible to apply sufficient twisting force to the thin wall part, making it easy to This has the effect of breaking the thin portion and creating an opening.

Further, according to the present invention, the recess of the cap into which the closed portion of the container body is inserted is provided at the top of the cap so as to open outward in the axial direction of the cap. Compared to other caps, when the concave portion and the closed portion of the container body are fitted together, it is easier to grasp the cap with fingers, and there are advantages in that it is easier to apply rotational force to the cap.

Furthermore, in the injection molding of the cap, since the cap of the present invention has a concave portion with an opening facing outward in the axial direction, the production mold is simpler compared to a cap having a side surface and a concave portion.
It has the advantage that it is easy to cut out the die and there is no risk of damage during die cutting.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional front view of a main part of a conventional twist-off container example, Fig. 2 is a cross-sectional front view of a main part of a container example of the present invention before the thin wall part is broken, and Fig. 3 is a cross-sectional front view of a main part of an example of a conventional twist-off container. Linear view, 4th
The figure is a plan view of the cap. B: Container body, 18: Output path, 19: Annular thin wall portion, 15
: Closed part, C: Cap, 25: Recessed part.

Claims (1)

[Claims] 1. A torsional force rotating around the axis of the container is applied to the occluded portion above the annular thin-walled portion surrounding the dispensing path of the container body, which blocks the dispensing path, to break the thin-walled portion. , an open twist-of-plastic container, the container comprising a container body and a cap, the cap comprising a top portion and a skirt portion depending from the periphery of the top portion and engaging the container body; The zenith portion has a concave portion, and the concave portion and the closing portion are formed in a relative shape such that the closing portion can be inserted into the concave portion and rotation of the cap can be transmitted to the closing portion after the insertion. 1. A twist-of-plastic container, characterized in that the recess is open outward in the axial direction of the cap.