JPS5834019Y2 - Extruded tube with blind lid - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an extruded tube with a blind lid that can be temporarily tightened with a cap.

In order to keep the contents stored in the extruded tube completely sealed until use, extruded tubes with blind lids are widely used, which have an integral blind lid at the mouth of the tube.
This type of tube always has a protrusion for breaking the blind part at the center of the inside of the cap screwed onto the mouth part or at the center of the tip of the cap, but if the protrusion is attached to the center of the inside of the cap, It is necessary to handle the tube in such a way that the blind cap is not easily torn until the tube is used.

The extruded tube with a blind lid of this invention allows the cap to be temporarily tightened on the mouth of the extruded tube with a blind lid during the capping process during the container manufacturing process, and when used, the consumer can simply tighten the cap slightly. A projection protruding from the center of the inside of the cap makes it possible to break the blind lid and make a hole to take out the contents.

For example, as shown in Figure 1, which has been proposed in the past,
The lower half 2 of the cap 1 made of relatively flexible synthetic resin is made thin, and an appropriate number of slits 3 are cut into the thin part to form a large number of thin legs 4. The leg piece 4 touches the shoulder part 10 of the tube 5 and the tube neck part 6
The protrusion 7 inside the cap that is screwed onto the cap is held in a state where it does not touch the blind lid 8, and when the consumer screws the cap further by hand during use, the protrusion 7 breaks through the blind lid 8 of the spout 9 and the contents are released. There is a device for extruding objects, but in this device, by further screwing the cap 1 together, the legs 4 spread radially in the circumferential direction on the slope of the shoulder portion 10 of the tube, and at the same time, the slit 3 also expands from below. It begins to open gradually and finally forms a fan-shaped groove 3' (see Figure 2), but it does not look good, and when stored after use, this fan-shaped groove 3' is used.
Since dust tends to adhere to the surface, there is a problem in terms of hygiene when used in pharmaceutical products, etc.

There are two ways to form the leg pieces 4: one is to mold them from the beginning with a mold, and the other is to first mold the cylindrical lower part and then carve the snots 3 with an appropriate cutting tool. In any case, the equipment costs are high and this becomes a cause of high costs.

In addition, since the leg 4 is divided into multiple parts by the slit 3 during temporary tightening, there is variation in the tightening torque of the cap when the leg comes into contact with the shoulder 10 of the tube, making it impossible to automate capping. There were drawbacks.

This invention is intended to eliminate and improve the above-mentioned drawbacks, and the tube has a blind lid similar to the tube shown in Fig. 1, and the cap has a protrusion for piercing the blind lid on the inner surface of the cap. The outer diameter of the hem is almost the same as the outer diameter of the body, and it is made of thin-walled cylindrical flexible synthetic resin. It stays at the end of the shoulder, but when the cap is screwed in further during use, the lower end of the hem slides down the slope of the shoulder, passes the corner where the shoulder connects to the body, and fits into the upper end of the body. It began to descend, and as it did so, a hole was made in the blind lid.

With this structure, even after the cap is opened, the appearance will not be damaged as in the cited example, and the shoulder area will not be contaminated by dust, making it hygienic, and making it possible to mechanize the capping process. It is also possible to provide an extruded tube with reduced cost.

To explain the details with reference to FIGS. 3 and 4, tube 1
1 consists of a body part 12, a shoulder part 13 and a mouth part 14, a blind lid 15 is provided at the upper end of the mouth part, and an external screw 1 for screwing the cap is provided on the outer periphery.
Set 6.

Numeral 17 is a projection for making a hole 20 in the blind lid 15 provided at the center of the inner surface of the top plate 19 of the cap 18, and a knurling 22 is carved on the outer periphery of the cap 18, and an inner groove 23 is carved on the inner periphery. has been done.

The outer diameter of the thin-walled cylindrical hem 24 integrally molded at the lower part of the cap 18 is approximately equal to the outer diameter of the tube body 12, and when temporarily tightening the cap, the lower end 25 of the hem is at the top of the taper 26 of the tube shoulder 13. reach the outside.

(At this stage, the protrusion 17 has not yet contacted the blind lid 15.

) This device is constructed as described above, and its operation will be described. In the capping process, when the cap 18 temporarily tightened on the tube shoulder and mouth portion as shown in FIG. 3 is further screwed, the hem portion 24 Since it is formed into a thin cylindrical shape, it is relatively soft, and although it is strong in the axial direction, it tends to spread in the circumferential direction.
slides down on the slope 26 of the shoulder 13 while expanding in the circumferential direction in a slightly trumpet-like manner, and when screwed in forcibly, the lower end 25 of the hem 24 climbs over the corner 27 of the shoulder 13 and surrounds the tube body 12. When screwed in further, the protrusion breaks through the blind cover 15 and creates a hole 20 of an appropriate size (see Figure 4).

Based on the above, the advantages of this invention can be summarized as follows: Since the cap surrounds the upper end of the tube body, it solves the problem of appearance as in the cited example, and also prevents dust from adhering to the mouth, shoulders, and other areas. It is hygienic because there are no molds, and there is no need for molds or cutting tools to create the legs, and the cap can be manufactured with more precision than conventional caps, reducing manufacturing costs. It has many advantages, such as being able to perform reliable temporary tightening without any variation in the tightening torque, and successfully mechanizing it with a capping machine, making mass production possible, and is considered to be a useful device in the industrial field.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cutaway front views of the left half of the conventional device before presentation, and FIGS. 3 and 4 are cutaway front views of the left half of the present invention. Explanation of symbols in the drawings 12...Torso, 13...
...Shoulder, 15...Blind lid, 17...
Protrusion, 19...Top plate, 24...Hem part,
25... lower end of hem, 26... slope, 2
7...Shoulder corner.

Claims (1)

[Scope of utility model registration request] In an extruded tube with a blind lid, which has a protrusion 17 for piercing the blind lid 15 of the tube container on the back surface of the top plate 19 of the cap, the lower end hem 24 of the outer periphery of the cap has an outer diameter that is approximately equal to the body 12 of the tube container. When the cap is strongly screwed in, the lower end 25 of the hem slides down the slope 26 of the shoulder 13 and passes over the corner 27 to the body 1.
2. An extruded tube with a blind lid, characterized in that it is configured to fit onto the upper end of a tube.