JPS5821396Y2 - Closed tube cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved cap for a closed tube container.

Conventionally, closed tube containers (the spout is blindly sealed until the consumer takes out the filled contents for the first time)
The cap that is screwed onto the neck of the tube container (which allows the contents to be taken out by breaking through the spout when taking out the container) has a
A protrusion is always attached to break the seal, and this cap is supplied to the market from a tube manufacturing factory through a filling factory, and must be handled so that the seal will not be broken until the consumer uses it. is necessary.

Therefore, various ideas have been devised to satisfy this requirement, and some of them have been put into practical use. For example, the most common one is to fit the top of the cap over the neck of the tube container and apply a pressing force. A cap that has a protrusion that breaks through the seal and is opened by changing the direction of the cap when opening, or a cap and tube that have an internal protrusion for opening as disclosed in Japanese Utility Model Publication No. 3810199. There is a system in which a screw-in stop ring is interposed between the shoulder of the container and the cap for screwing and holding the cap without the protrusion coming into contact with the closure.

However, although the former type is common, it is inconvenient because the cap must be removed from the neck and reversed to open it, and the latter type requires the stop ring to be removed when opening. This is also inconvenient because the cap must be screwed on again after being removed.

Therefore, in order to solve this problem, the present applicant proposed the invention of the earlier application (Utility Application No. 123608-1982, Publication No. 4628-1983).
In No. 5), the lower part of the cap body, which has a downwardly pointed protrusion in the center of the inner upper surface of the cap, is made thinner and an appropriate number of slits are carved, and this part is used as a large number of thin legs for temporary prevention of opening. I obtained one with an integral structure formed in one piece,
When this is automatically screwed onto the neck of the tube container at the end of the tube container manufacturing process, when a certain amount of torque is applied to attach it, the thin legs inevitably tend to be pushed open, which prevents the seal from being opened. It became unstable, and there was a risk that unexpected opening movement would occur during transportation or other handling.

In the present invention, even if this is mechanically and automatically screwed into a fixed position with respect to an unfilled tube container, it will be secure until the user opens the container □ even during subsequent handling. This is an improved screw cap that securely and safely screws onto the neck of the tube, and applies a strong screw-down force at the beginning of opening to make subsequent operations easier. It is about providing.

That is, in the present invention, in the cap of the tube container,
A protrusion pointing downward is formed in the center of the inner upper surface of the cap, and an appropriate number of slits are formed in the lower part of the flexible synthetic resin main body, which has a female screw threaded on the inner periphery to be screwed into the outer circumferential thread of the neck of the container. The thin-walled holding part, which can be divided into parts, is extended into a cylindrical shape by the required length, and the lower end of the holding part is made into an annular shape with a thin string-like part connecting each slit part.

When a cap is formed with a pointed tube integrally formed, the outer circumferential surface of the cap body that is screwed onto the neck of the tube container is formed with knurling grooves in the axial direction, and the pointed tube is A plurality of protrusions are provided on the inner peripheral surface of the protective outer cap at a required pitch to engage with the grooves on the outer periphery of the main body, and when the outer cap is fitted onto the cap main body, the protrusions engage with the grooves on the outer periphery of the main body. By fitting into the grooves of the cap, rotational force can be transmitted to the cap body in the fitted state, and the opening operation can be performed as is.

Below, the present invention will be explained in detail with reference to embodiments.
The ones shown in FIGS. 3 to 3 relate to a conventional closed tube container neck cap 2 of a tube container 1.
The screw cap 10 that is screwed onto the outer circumferential screw portion 3 is made of relatively flexible synthetic resin, and has an opening protrusion 12 projecting downward from the center of the upper surface inside the main body 11. The thin-walled holding portion 13 is formed into a cylindrical shape that is extended to a required length so that it can be divided by a plurality of slits 14,
A thin cord-like projection ring 15 is integrally formed inside the lower end, thereby connecting the divided portions by the slit 14.

As shown in FIG. 1, the length of this holding part 13 is determined when the projection 12 is opened when the female thread 16 carved on the inner periphery of the cap 10 is screwed into the threaded part 3 of the container neck 2. The dimensions are set such that the lower end can be held in contact with the shoulder part 5 without contacting the part closing wall 4, and the number of divisions by the slit 14 should be as small as possible within the allowable range.
5 may be provided on either the inner or outer surface.

According to the cap of the present invention constructed in this way, when the cap is attached at a tube manufacturing factory, the thin leg piece forming the holding part 13 has an arcuate cross section in the section divided by each slit 14, and has a protruding lower end. Since they are interconnected by the rings 15, they can be screwed onto the container neck 2 with a preset torque, and can be automatically attached without any problem even if the lower end contacts the shoulder 5.

In this state, the cap 10 is held in a stable state until further use without rotating due to the frictional force of the lower end of the holding portion 13 in contact with the tube container shoulder portion 5.

When using the cap 10, if the user grasps the outer periphery of the cap 10 and rotates it in the direction of screwing it in, the holding part 1 is first removed.
The protrusion ring 15 connecting the slit 14 portion of No. 3 is broken,
Since the thin leg part divided between each slit becomes free, the lower end 1 is
3' expands outward along the slope of shoulder 5 of the tube container,
The tampering force is released, the protrusion 12 breaks through the closing wall 4, and the seal can be opened.

After the contents are taken out by opening the cap, the operation function of the holding portion 13 is not affected and the cap can be used in the same manner as a conventional cap.

The above description has been about general type caps, but specific examples of caps that are applied to, for example, mastitis treatment drug tube containers equipped with pointed tubes, are shown in Figures 4 to 6. A protrusion 22 is provided in the center of the inner upper surface of the main body 21, which is made of a relatively flexible synthetic resin and has a female thread 26 carved on the inner circumferential surface to be screwed into the screw neck 2 having a A hole 27' is provided in the center, through which a pointed tube 27 of an appropriate length protrudes and passes through to the protrusion 22.
1. At the lower part of the outer periphery, a thin holding part 23 is formed into a cylindrical shape that can be divided by a plurality of slits 24 with an appropriate amount of flange and slightly expanded downward, and a thin string-shaped holding part 23 is formed on the inside of the lower end. A protrusion ring 25 is integrally formed to connect the divided portions formed by the slit 24, and a large number of grooves 28 are formed in a knurling shape in the axial direction on the outer periphery of the main body to form a cap 20 with a pointed tube. and the cap 20
A pointed tube protection cap 30 is assembled, the lower end of which is fitted onto the outer periphery of the main body 21, and has a plurality of protrusions 31 protruding from the inner periphery to engage with the grooves 28.

Note that the reference numeral 32 in the figure is a sealing portion of the pointed tube 27.

Since the cap 20 configured in this manner is fitted onto the protective cap 30 by engaging the grooves 28 and the protrusions 31 as described above, it is easy to attach the cap 20 to a closed tube container at a tube manufacturing factory. , can be automatically attached in the combined state, and the screwing to the neck is the same as in the case of the above-mentioned specific example. By screwing, the lower end of the holding part 23 is attached to the shoulder part 5 of the tube container.
The slit 24 is expanded along the slit 24 as shown in FIG.
The protruding ring 25 that connects the parts is broken and the seal is opened in the same manner as in the above-described specific example, and the intended purpose can be achieved.When removing the contents, the protective cap 30 can be moved in the axial direction. The protrusion 31 that engages along the groove 28 can be removed by sliding and can be used.

Thereafter, by fitting the protective cap 30 onto the main body 21, the tip of the pointed tube 27 fits into the sealing part 32 inside the protective cap 30, thereby preventing leakage of the contents.

According to the present invention, when attaching the cap to the tube container before filling, the holding part connected to and integrated with the lower part of the main body is configured so that it will not open unless more than the required torque is applied. , the automatic installation work using mechanical force is made easy, and when the user opens the cap, the user can simply open it by screwing the cap firmly and breaking the connection at the slit part of the protruding ring. Something like a cap equipped with a tube could be put to use immediately after removing the protective body, and could be made into a useful item that could be put to practical use easily and effectively.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a specific example showing how the cap of the present invention is attached to a container, Fig. 2 is an external view, Fig. 3 is a view showing how the cap is opened, and Fig. 4 is a longitudinal cross-sectional view showing how the cap is opened. , FIG. 5 is a sectional view taken along line XX in FIG. 4, FIG. 6 is an external view of FIG. 4,
FIG. 7 is a diagram showing how the package is opened. 1...Tube container, 2...Neck, 3
...Threaded portion, 4...Closing wall, 5...
...Shoulder, 10...Screw cap, 11゜2
1...Main body, 12.22...Protrusion for opening, 13.23...Holding part, 14.24...
...Slit, 15,25...Protrusion ring, 16
゜26... Female thread, 20... Cap with pointed tube, 27... Pointed tube, 30...
・Protective cap.

Claims (1)

[Scope of utility model registration request] A flexible cap for a closed tube container that has a protrusion in the center of the inner upper surface of the cap for piercing the opening closing wall of the tube container, and has a female screw threaded on the inner periphery to be screwed into the outer thread of the neck of the container. At the bottom of the main body made of synthetic resin, a thin holding part that can be divided by an appropriate number of slits is formed in a cylindrical shape and extended to the required length, and the lower end of the thin holding part is connected to the A cap for a closed tube container characterized by connecting slit parts.