JPH0354049Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tube cap with a closure material used as a container for pharmaceuticals, cosmetics, foodstuffs, etc.

[Prior Art] Some tubes used as containers for pharmaceuticals, cosmetics, foodstuffs, etc. are provided with a passage closing material at the opening to protect the contents during distribution and storage. In order to remove the contents from such a tube, the passage closing material may be punctured with a thin needle to force out the contents, but if the passage closing material is simply punctured with a needle, the hole is small and a small amount of the contents can be extracted. Depending on the type of contents, it may be necessary to make a large hole.

Therefore, conventionally, as shown in FIG. 4, a concave part 13 is provided on the opposite side of the threaded part 12 that fits into the tube 15 of the cap 11, and the cross-sectional area of the root is approximately the same as that in the center of the concave part 13, which closes the passage of the tube 15. Some have needle-like protrusions 14 that are comparable in width to the material 16. After the cap 11 is removed from the tube 15, the cap 11 is turned over, the concave part 13 is inserted into the mouth part 17 of the tube 15, and the passage closing material 16 is pierced with the needle-like protrusion 14. This needle-like protrusion 1
4 has a shape slightly bulging outward from the conical shape shown by the dotted line.

[Problems to be Solved by the Invention] When the passage closure 16 of the tube is broken using the needle-like protrusion 14 in the conventional cap described above, the broken piece tends to be simply pushed diagonally inward as shown in the figure. When pushing out the contents, they may be pushed back and narrow the passage.

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems.In a tube cap having a passage closing material in the mouth part, a threaded part that fits into the tube is provided with a cap of the tube. , there are curved surfaces partitioned by three or four vertical ridges, and each curved surface has a conical protrusion with a concave curved tip and a convex curved base. This is a tube cap with a closure material, which is characterized by the following.

The basic shape of the conical projection may be any one of a conical shape, a bell shape, and a pyramid shape. It is preferable that the concave curved surface at the distal end and the convex curved surface at the proximal end are formed continuously.

[Operation] When the cap of the present invention is used, the cap is unscrewed from the mouth of the tube, reversed, and the conical projection is inserted through the mouth of the tube to break through the internal passage closing material. Then, the passage closing material is torn by the plurality of ridges and separated into small pieces. Each small piece has a small area and is cut with the tip curled along the concave curved surface of the tip of the conical process.
The resistance is reduced, and when the contents are pushed out of the tube, the passage will not be narrowed by being pressed and blocked.

[Example] Figures 1A to 1F show an example, in which the cap main body 1 has recessed parts 2 and 3 on the upper and lower sides.
There is a protrusion 4 therein for cutting the passage closing material of the tube. Further, the recessed part 3 has a threaded part 5 which is screwed into the mouth part of the container.

The tip of the protrusion 4 is basically conical, as shown in FIG. The portion is sharpened to easily cut through the passageway closing material. The ridge surface 8 is formed as a bulging arc surface as a whole, with the proximal portion a being a convex curved surface with a bulging radius, and the tip portion b being a concave curved surface with an opposite radius. It is a curved surface.

FIG. 3 shows another embodiment in which four ridgeline portions 7 are formed. This is effective for relatively large diameter tubes.

[Effects of the invention] When the protrusion provided on the cap of the invention breaks through the passage closing material at the mouth of the tube, the passage closing material is separated into small pieces along the ridgeline as shown in Fig. 5. Each piece is first guided by the concave curved surface of section b and curled into the inner surface of the tube, and then the convex curved surface of section a strongly pushes the pieces apart in the radial direction. Therefore, the resistance during extrusion of the contents is reduced, and the passage will not be blocked and narrowed by being pushed back by the pressure during extrusion. Therefore, once the passageway closure material is penetrated,
A predetermined amount of content can always be extruded.

In particular, if the ridge surface of the ridge line is formed in a bulging arc shape, and the base of the ridge line itself is formed in a bulging shape, there is a reinforcing effect, and if the tip of the ridge line has a reverse radius, Breakthrough performance is further improved.

[Brief explanation of drawings]

1A to 1F show an example of the implementation of the present invention, in which A is a perspective view, B is a plan view, C is a sectional view taken along A-A in B,
D shows a front view, E shows a bottom perspective view, and F shows a bottom view. 2A and 2B are enlarged views of the protrusion, A is a plan view, B is a front view, and C is a sectional view taken along line B-B of A. FIG. 3 shows a plan view of another embodiment. FIG. 4 is a vertical sectional view of the conventional example, and FIG. 5 is an explanatory view of the passage closing material cut according to the present invention. 1... Cap body, 2, 3... Recessed part, 4...
...Protrusion, 5... Threaded portion, 6... Concave curved surface, 7... Ridge line portion, 8... Edge surface, 11... Cap, 12...
Threaded part, 13... Concave part, 14... Acicular projection, 1
5...Tube, 16...Passway closing material, 17...
Oral part.

Claims (1)

[Scope of utility model registration request] In a tube cap with a passage closing material provided at the mouth part, on the opposite side of the threaded part that fits into the tube, there is a curved part partitioned by three or four vertical ridges, and each curved part A cap for a tube with a closure material, characterized by having a conical protrusion having a concave curved surface at the distal end and a convex curved surface at the proximal end.