JPH0433245Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to containers with caps such as bottle containers and tube containers.

《Prior art and its problems》 This type of container generally has a neck portion with a pouring spout and a body portion that are integrally formed via a shoulder portion to form the container body, and a cap can be attached and detached from the outer periphery of the neck portion. It has a screw-on structure. In order to ensure that the cap seals the spout, an annular or hemispherical protrusion is provided on the inner surface of the cap, and this protrusion is pressed against the upper end surface of the neck when the cap is completely screwed onto the neck. This is what is being done. However, a high degree of dimensional accuracy is required to ensure the pressure contact between this protrusion and the upper end surface of the neck, and there is a problem in that if there are dimensional variations when molding the cap or neck, the sealing performance will deteriorate. has been pointed out. Additionally, as the cap is repeatedly attached and removed, the protrusion may become crushed and deformed, or the portion of the upper end of the neck that corresponds to the protrusion may become depressed, which may deteriorate the sealing performance. .

[Purpose of the invention] The present invention was created in view of the above-mentioned circumstances, and its purpose is to ensure that the protrusion of the cap and the upper end surface of the neck come into contact with each other even if slight dimensional variations occur during molding, and to To provide a container with a cap that can ensure sealing performance and that does not deteriorate during use.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a container with a cap of the type described above such that the lower edge of the cap comes into contact with the shoulder of the container body before the screwing is completed. In addition to setting the height of the cap, there is a thin wall on at least one of the neck and shoulder that allows the neck to move upward when the cap is screwed from the position where the lower edge contacts the shoulder. The flexible part is formed into an annular shape.

<<Operation>> As the cap is screwed onto the neck, its lower edge comes into contact with the shoulder. When the cap is rotated from this position and further screwed together, since the cap is prevented from moving downward, a force is exerted on the neck to move it upward, and the flexible portion allows this movement. As a result, the neck moves upward and the protrusion of the cap comes into pressure contact with the upper end surface of the neck.

<<Example>> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a container with a cap according to an embodiment of the present invention, and reference numeral 1 in the figure is a container body made of synthetic resin. A small-diameter neck portion 4 is integrally formed with a shoulder portion 3 interposed therebetween, and a thread 5 is formed on the outer periphery of the neck portion 4, and an inner stopper 6 is fitted to the upper edge of the opening of the neck portion. The contents stored in the body 2 are poured out little by little from a spout 7 formed in the inner stopper 6 and forming a part of the neck.
In addition, if desired, the inner stopper 6 may be formed integrally with the neck portion 4. Further, in the illustrated example, a stepped portion 8 is formed on the upper surface of the inner stopper 6 at the periphery of the spout 7 to ensure more secure pressure contact with a protrusion of the cap, which will be described later.

Below the thread 5 of the neck portion 4, thin flexible portions 9 which are bent radially inward are provided in an annular shape around the entire circumference. 4 is expandable and retractable in the vertical direction.

On the other hand, the hollow cylindrical cap 10 is composed of a top surface 11, an inner circumferential wall 12, and an outer circumferential wall 13, and a thread 14 is provided on the inner surface of the inner circumferential wall 12 to engage with the thread 5 of the neck portion 4. As well as the top surface 1
An annular protrusion 15a and a hemispherical protrusion 15b located approximately at the center thereof are formed on the inner surface (lower surface) of the annular protrusion 15a. The height of the outer circumferential wall 13, that is, the length from the inner surface of the top surface 11 to the lower edge, is made longer by a distance "l" than the height of the neck 4 including the inner stopper 6 from the shoulder 3 in normal times. This outer peripheral wall 13
The relationship between the height of the outer peripheral wall 13 and the threads 5 and 14 is as follows.
Cap 1 from the position where the lower edge of
0 can be displaced relative to the neck 4 by at least a distance "l".

Next, the operation of attaching and detaching the cap 10 will be described. First, with the cap 10 removed, place it over the neck 4, rotate the cap 10, and connect the screws 5 and 1.
4, the cap 10 moves downward until the lower edge of the outer peripheral wall 13 comes into contact with the shoulder 3, reaching the position shown in FIG. 1a. When the cap 10 is rotated from this position in a direction to further advance the screwing, the downward movement of the cap 10 is caused by the shoulder 3.
As a result, a force that tends to move upward acts on the thread 5 of the neck portion 4. As a result, the flexible portion 9 extends and the neck moves upward, and at the final screwing position of the cap 10, the upper end surface of the neck 4 where the annular protrusion 15a of the top surface 11 has been raised;
That is, in this embodiment, the hemispherical protrusion 15b comes into pressure contact with the upper surface of the inner stopper 6, and partially enters into the spout 7 and comes into pressure contact with the stepped portion 8 on the periphery (FIG. 1b). As a result, the inside of the container body 1 is sealed. Furthermore, when removing the cap 10, it is sufficient to turn it in the opposite direction.

The structure of the thin flexible portion 9 is not limited to that of the above embodiment, and various configurations are possible. For example, in the embodiment shown in FIG. 2, the bellows-shaped flexible portion 9a is , and in the embodiment shown in FIG.
They are each formed in the lower part of the neck part 4, and when these flexible parts expand, the neck part 4 moves upward. Further, the location where the flexible portion is formed is not limited to the neck portion 4, but may also be provided on the shoulder portion 3 as shown in FIGS. 4 to 6.
That is, in the embodiment shown in FIG. 4, the flexible portion 9c is formed by gouging out the lower surface of the shoulder portion 3 adjacent to the base of the neck portion 4 in a semicircular shape, and in the embodiment shown in FIG. Approximately the inner half of the shoulder part 3 forms a ring-shaped flexible part 9d and is connected to the neck part 3, and in the embodiment shown in FIG. A thin flexible portion 9e is formed. These flexible portions 9c, 9d, and 9e are all provided inside the position where the outer circumferential wall 13 of the cap 10 comes into contact, and when these flexible portions bend, the neck portion 4 moves upward using this as a fulcrum. (See Figures 4b to 6b.)

Further, in each of the embodiments described above, the cap 10 is provided with an inner circumferential wall 12 and an outer circumferential wall 13, but if desired, the latter may be omitted and the length of the inner circumferential wall may be set as described for the outer circumferential wall. You can also do it.

<<Effects of the invention>> As mentioned above, in the present invention, by providing a flexible portion on at least one of the neck and the shoulder, the neck moves upward through the flexible portion when the cap is fully screwed. Since the flexible part is in pressure contact with the protrusion of the cap in the state of Since it is a pressure weld, it is possible to prevent deterioration of sealing performance due to collapse of the protrusion even after long-term use.

[Brief explanation of the drawing]

Figure 1a is a sectional view of the main part of a container with a cap according to an embodiment of the present invention before the final screwing position of the cap, and Figure 1b is a sectional view of the main part of the container in a state where the cap is completely screwed. The sectional views of FIGS. 2a and 2b to 6a and 6b are similar sectional views to FIGS. 1a and 1b, respectively, showing containers with caps according to other embodiments of the present invention. 1... Container body, 2... Body, 3... Shoulder, 4
... Neck, 5, 14 ... Screw, 9, 9a, 9b,
9c, 9d, 9e...Flexible portion, 10...Cap, 15a, 15b...Protrusion.

Claims (1)

[Claims for Utility Model Registration] (1) The neck and body are integrally formed via the shoulder to form a container body, a cap is removably screwed onto the neck, and the screwing of the cap is completed. In a container with a cap in which a protrusion formed on the inner surface of the cap is pressed against the upper end surface of the neck, the height of the cap is set so that the lower edge of the cap contacts the shoulder before the screwing is completed. At the same time,
At least one of the neck and the shoulder,
A thin flexible part is formed in an annular shape to allow the neck to move upward when the cap is screwed from the position where the lower edge contacts the shoulder. A container with a cap. (2) The container with a cap according to claim 1, wherein the flexible portion is formed on the neck and is expandable and contractible in the vertical direction. (3) Utility model registration claim 1, characterized in that the flexible portion is formed on the shoulder portion, and the neck portion is movable upward using the flexible portion as a fulcrum.
Container with cap as described in section.