JPH08318963A - Cap - Google Patents

Abstract

PURPOSE: To provide a cap which does not involve entry of rust in the contents, enables opening the upper lid at a suitable velocity gently by virtue of the restoring force of a rubberlike elastic body, permits the upper lid to be turned over at a sufficiently large angle of opening, and has good strength to resist shocks. CONSTITUTION: This cap 10 has between a cap body 11 and an upper lid 12 a rubberlike elastic body 26 which is capable of flexural elastic deformation. A hinge 13 of this cap has a resistance to opening in the range of 3-15gf (20 deg.C).

Description

Detailed Description of the Invention

[0001]

This invention relates to caps.

[0002]

2. Description of the Related Art There is a conventional cap in which a cap body is attached to the mouth of a container and an upper lid is openable and closable with respect to the cap body. Further, in such a cap, a leaf spring is arranged between the cap body and the upper lid as in the inventions disclosed in Japanese Utility Model Publication No. 3-69656 and Japanese Utility Model Publication No. 63-88965. The upper lid is opened by the urging force of.

[0003]

However, the leaf spring has a strong urging force, and the top lid opens abruptly. Further, since the leaf spring is generally made of metal, it is easily rusted, and there is a possibility that the rust is mixed with the contents in the container poured from the nozzle of the cap body.

The applicant of the present invention has taken the above circumstances into consideration.
Japanese Patent Application No. 5-168356 and Japanese Patent Application No. 6-79307 propose caps that prevent rust from entering the contents and allow the elastic force of the rubber-like elastic body to gently open the upper lid at an appropriate speed. are doing. These prior-art techniques use the above-mentioned cap in the hinge 3 of the cap body 1 as shown in FIG.
A base end portion of a rubber-like elastic body 4 having a U-shaped cross section is attached in the vicinity, and the rubber-like elastic body 4 is configured to bend and elastically deform between the cap body 1 and the upper lid 2 when the upper lid 2 is closed. is there. According to this prior application technique, the lid stop means (5A, 5A,
When the closing action of B) is released, the upper lid 2 is opened by the restoring force (spring force) of the rubber-like elastic body 4 that has been bent and elastically deformed.

However, as a result of the experiment and research conducted by the present inventor, the following improvements have been desired in the above-mentioned prior application technique. Make sure that the opening angle of the top lid can be made sufficiently large by the restoring force of the rubber-like elastic body.

It must have sufficient impact resistance so that the hinge will not break when the container is dropped at low temperature.

According to the present invention, rust is not mixed in the contents, and the restoring force of the rubber-like elastic body allows the upper lid to be opened gently at an appropriate speed, and the opening angle of the upper lid is sufficient. An object of the present invention is to provide a cap which can be made large and has sufficient impact resistance.

[0008]

SUMMARY OF THE INVENTION According to the present invention, an upper lid is openably and closably coupled to a cap body via a hinge and is provided on the cap body and the upper lid. The upper lid is locked to each other when the upper lid is closed. A cap formed by integrally molding a cap main body, a hinge, and an upper lid with a resin for a cap, which has a closing lid locking means for keeping the position, and a rubber-like elastic body is provided in the vicinity of the hinge on at least one of the cap body and the upper lid. The base end is attached and the rubber-like elastic body is elastically deformed between the cap body and the top lid when the top lid is closed, and the hinge opening resistance is 3 to 15 gf (20 ° C). It was done like this.

[0009]

According to the present invention, there are the following actions. Since the rubber-like elastic body disposed between the cap body and the upper lid is configured to elastically deform when the upper lid is closed, if the closing action of the lid locking means is released, this elastically deformed rubber-like elasticity is generated. The upper lid can be opened by the restoring force (spring force) of the body. Since this restoring force is not excessive like the leaf spring, the upper lid can be gently opened at an appropriate speed.

Since the object which gives a restoring force to the upper lid is a rubber-like elastic body and is not made of metal such as a leaf spring, it does not corrode, so that rust is mixed in the contents poured from the nozzle of the cap body. There is no.

Since the opening resistance of the hinge is as low as 15 gf or less, the opening angle of the upper lid due to the restoring force of the rubber-like elastic body can be made sufficiently large.

Since the opening resistance of the hinge is 3 gf or more, it has sufficient impact resistance so that the hinge will not be broken when the container is dropped upside down (both bending resistance and twist resistance are also provided). .

[0013]

1 is a schematic view showing a cap according to an embodiment of the present invention, FIG. 2 is a schematic view showing an open state of the cap, FIG. 3 is a schematic view showing a closed state of the cap, and FIG. FIG. 5 is a schematic view showing a method for measuring the opening resistance of the hinge in the cap.
FIG. 6 is a schematic view showing a cap according to the prior application technique.

As shown in FIGS. 1 to 3, the cap 10
The cap body 11 and the upper lid 12 are the main hinges 1
3 is configured to be openably and closably connected.

The cap body 11 has a substantially cylindrical shape having a top surface 14, and a female screw 16 is formed on the inner surface of the tubular portion 15. In addition, a male screw is formed at the mouth of the container 100, and the female screw 16 is screwed onto the male screw, and the cap 10
Is attached to the container. Further, a nozzle 19 is opened in the central portion of the bulging portion 17 on the top surface 14. By squeezing the container, the contents in the container can be discharged (poured) from the nozzle 19.

The upper lid 12 is substantially bowl-shaped, and an inner seal 20 (seal portion) is formed in the central portion thereof. When the upper lid 12 is closed, the inner seal 20 is provided in a liquid-tight fit with the nozzle 19. The nozzle 19 is reliably sealed by the inner seal 20.

The main hinge 13 is thinly formed between the cap body 11 and the upper lid 12, is configured such that only the hinge fulcrum portion can be bent and deformed, and the position of the hinge fulcrum is fixed. It is integrally formed with the upper lid 12. A locking surface 22 is formed on the cap body 11 at a position opposite to the main hinge 13. When the upper lid 12 is closed, the engaging portion 22 of the upper lid 12 is attached to the engaging surface 22.
Are provided so that they can be fitted. The locking surface 22 and the locking portion 23 are configured as a closing lid locking means. The inner seal 20 is also fitted into the nozzle 19 and functions as a lid locking means.

Now, on the top surface 14 of the cap body 11,
A fitting groove 25 is formed near the main hinge 13, and a rubber-like elastic body 26 is fitted into the fitting groove 25. The rubber-like elastic body 26 is made of rubber or elastomer (for example,
KE951 manufactured by Shin-Etsu Chemical Co., Ltd. as a compound
U and a methyl vinyl type raw rubber synthesized with C-8 manufactured by the same company as a vulcanizing agent).

As shown in FIGS. 2 and 3, the rubber-like elastic body 26 has a substantially U-shaped cross section, and the base end portion 26A is fitted into the fitting groove 25. Reference numeral 26B is an enormous locking portion which is continuous with the base end portion 26A. An intermediate portion 26C of the rubber-like elastic body 26 extends from the cap body 11 side to the upper lid 12 side, and a tip portion 26D has a tapered wedge shape and is downward from the intermediate portion 26C so as to approach (or press-contact) with the inner surface of the upper lid 12. Have been extended towards.

During the process of closing the upper lid 12, the rubber-like elastic body 26 bends inward by bending the tip portion 26D which is close (or pressure contact) to the inner surface of the upper lid 12 by the inner surface thereof. The whole of the end portion 26A, the intermediate portion 26C, and the tip portion 26D is bent and elastically deformed between the cap body 11 and the upper lid 12.

However, in the cap 10, the cap body 11, the upper lid 12 and the hinge 13 are integrally molded with the resin for the cap, and based on the results of the following experiments (A) and (B), (a) The flexural modulus of the cap resin is 3,000 to 12,000
kg / cm ² (b) The hinge 13 opening resistance is 3 to 15 gf (2
0 ℃).

Examples of the above-mentioned cap resin include Showa Denko KK Show Alomer MD770H and MG.
474, MK413A, Mitsui Petrochemical Industry Co., Ltd. Hypol J859Y, Mitsubishi Petrochemical Co., Ltd. Mitsubishi Polypro BC4
C and BC3C can be adopted.

(A) Bending elastic modulus of the cap resin (Table 1) The bending elastic modulus of the cap resin is changed, and the opening angle (5 ° C, 20 ° C) of the upper lid 12 at each bending elastic modulus, the container is inverted and dropped. (1m x 10 times, 5 ° C) Impact resistance strength (broken hinge), closed lid locking moderation, and container mountability were evaluated.
Table 1 was obtained. In the above, the opening angle was measured after conditioning the cap employing silicone rubber as the rubber-like elastic body at each temperature for one day. Further, the above was comprehensively evaluated for gripping property without deformation by the cap mounting machine and screwing property without overrun at the tightening end.

[Table 1]

Bending elastic modulus of the cap resin is 3,000 kg / cm
^When it is less than ² , (1) when the upper lid 12 is closed, the locking sound of the locking surface 22 and the locking portion 23 provided on each of the cap body 11 and the upper lid 12 is weak, and the closed lid locking moderation is poor.

(2) The cap 10 becomes excessively soft.
Therefore, when the cap is gripped by the cap mounting machine, the cap is largely deformed and the gripping property of the cap 10 is poor.
Also, when screwing the cap 10 on the cap mounting machine,
The screws of the cap 10 and the container 100 will overrun the tightening ends of them and overrun, resulting in poor mountability to the container.

Further, the flexural modulus of the cap resin is 12,0
When it exceeds 00 kg / cm ² , (1) the hinge 13 becomes excessively hard, the opening resistance of the hinge 13 is high, and the opening angle of the upper lid 12 due to the restoring force of the rubber-like elastic body cannot be made sufficiently large.

(2) When the container 100 is dropped at a low temperature or the like, the hinge 13 is broken and the impact strength is weakened.

Therefore, in the present invention, the flexural modulus of the cap resin is 3,000 to 12,000 kg / cm ² .

(B) Opening resistance force of the hinge 13 (Table 2) The opening resistance force of the hinge 13 is changed, and the opening angle of the upper lid 12 (20 ° C.) and the inverted container drop (1 m ×) at each opening resistance force.
The impact resistance strength (broken hinge) of 10 times at 5 ° C. was evaluated, and Table 2 was obtained.

[Table 2]

Regarding the cap using silicone rubber as the rubber-like elastic body, the cap main body 11 is fixed to the gripping base 31 and the upper lid 12 is placed at a substantially horizontal position of 100 mm / min using the test device shown in FIG. Opening speed of 2-3
The sensor 32 measures the opening resistance force (g) (maximum value) when it is opened up by mm.

If the opening resistance of the hinge 13 is less than 3 gf,
When the container 100 is dropped at a low temperature, the hinge 13 is broken,
Impact resistance, bending resistance, and twist resistance are weakened.

When the opening resistance force of the hinge 13 becomes higher than 15 gf, the upper lid 12 becomes difficult to open, and the opening angle of the upper lid 12 due to the restoring force of the rubber elastic body cannot be made sufficiently large.

Therefore, in the present invention, the opening resistance is 3 to 15.
It is gf (20 ℃). The operation of this embodiment will be described below. The rubber-like elastic body 26 disposed between the cap body 11 and the upper lid 12 is configured to elastically deform when the upper lid 12 is closed. Therefore, if the lid closing action of the lid locking means is released, this elastic deformation is generated. The upper lid 12 can be opened by the restoring force (spring force) of the rubber-like elastic body 26. Since this restoring force is not excessive like the leaf spring, the upper lid can be gently opened at an appropriate speed.

The object that gives the restoring force to the upper lid 12 is the rubber-like elastic body 26, which does not corrode because it is not made of metal such as a leaf spring. Therefore, the contents poured from the nozzle opening 19 of the cap body 11 are No rust is mixed in.

Bending elastic modulus of the cap resin is 12,000 kg
Since / cm ² or less, the hinge does not become excessively hard, the opening resistance of the hinge is low, and the opening angle of the upper lid due to the restoring force of the rubber-like elastic body can be made sufficiently large.

The flexural modulus of the cap resin is 12,000 kg
Since it is / cm ² or less, it has a sufficient impact strength so that the hinge is not broken when the container 100 is dropped at a low temperature.

Bending elastic modulus of the cap resin is 3,000 kg /
Since it is cm ² or more, when the upper lid is closed, the closing lid locking means (locking surface 22, locking portion 23) provided on each of the cap body and the upper lid makes a strong locking sound and locks. It has a sense of stoppage.

The flexural modulus of the cap resin is 3,000 kg /
Since it is cm ² or more, the cap does not become excessively soft. Therefore, when gripping the cap with the cap mounting machine, the cap is not greatly deformed, and the gripability of the cap is good. Further, when the cap is screwed with the cap mounting machine, the screws of the cap and the container do not overrun their fastening ends and overrun, and the screwability to the container is good.

Since the opening resistance force of the hinge 13 is as low as 15 gf or less, the opening angle of the upper lid 12 due to the restoring force of the rubber-like elastic body can be made sufficiently large.

Since the opening resistance of the hinge 13 is 3 gf or more, the hinge 13 has sufficient impact resistance so that the hinge 13 will not be broken when the container 100 is dropped upside down (both the bending resistance and the twist resistance are combined). Have).

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention can be made. Even if it exists, it is included in the present invention. For example, the rubber-like elastic body may be attached to the upper lid side and its tip end may be pressed against the cap body side.

Further, the rubber-like elastic body which is elastically deformed between the cap body and the upper lid when the lid is closed may be fitted to the two-face mounting portion formed on at least one of the cap body and the upper lid. good. Further, the closing lid locking means provided on the cap body and the upper lid is not limited to the combination of the injection port on the cap body side and the sealing engagement portion on the upper lid side, and the locking manner is not limited. May be.

[0043]

As described above, according to the present invention, rust is not mixed into the contents and the restoring force of the rubber-like elastic body allows the upper lid to be opened gently at an appropriate speed. Also, the opening angle of the upper lid can be made sufficiently large, and a cap having sufficient impact strength can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view showing a cap according to an embodiment of the present invention.

FIG. 2 is a schematic view showing an open state of a cap.

FIG. 3 is a schematic view showing a closed state of a cap.

FIG. 4 is a schematic diagram showing a method for measuring the opening resistance of a hinge in a cap.

FIG. 5 is a schematic diagram showing a cap according to the prior application technique.

[Explanation of symbols]

 10 Cap 11 Cap Main Body 12 Upper Lid 13 Hinge 22 Locking Surface 23 Locking Part 26 Rubber Elastic Body

Claims (1)

[Claims] 1. A lid locking means for connecting an upper lid to a cap main body via a hinge so as to be openable and closable, and provided on the cap main body and the upper lid, and locking each other when the upper lid is closed to keep the upper lid at a closed position. A cap formed by integrally molding a cap body, a hinge, and an upper lid with a resin for a cap.A base end portion of a rubber-like elastic body is attached to at least one of the cap body and the upper lid near the hinge. The cap is characterized in that the rubber-like elastic body is elastically deformed between the cap body and the upper lid when closed, and the hinge opening resistance is 3 to 15 gf (20 ° C).