JP2543664Y2 - Container cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a container cap.

[Conventional technology]

For example, when a substance such as a bleach, which naturally generates gas due to absorption of moisture or an increase in temperature (hereinafter referred to as "gas generating substance"), is placed in the container, There is a possibility that the outside air enters and gas is generated from the gas generating substance, and the internal pressure of the container increases, whereby the stopper is detached or the container is damaged. Therefore, it is conceivable to put the gas generating substance in a container capable of sufficiently dispersing the internal pressure to the outside air, but in such a container, the gas generating substance itself easily flows out of the container.

In order to cope with this, for example, containers disclosed in Japanese Utility Model Laid-Open No. 58-133697, Japanese Utility Model Laid-Open No. 57-85451, Japanese Utility Model Laid-Open No. 58-14852, etc. Cover the hole with a membrane made of a material that does not allow liquid to pass through but allow gas to pass through (hereinafter referred to as “liquid-impermeable gas-permeable membrane”), make a stopper with a membrane, put the gas generating substance in the container, and close the stopper. By
FIG. 2 shows a container that can not only naturally release gas but also prevent leakage of contents.

[Problems to be solved by the invention]

By the way, in such a container, if the cap and the stopper are not tightly fastened, there is a possibility that the contents may leak from a gap formed due to the cap or the stopper. For this reason, caps and stoppers must be tightly closed.

However, there are times when you intend to do so, but not actually.

The problem of the present invention is to provide a container with a stopper to which a liquid-impermeable gas-permeable membrane is applied, even if the cap or stopper is not sufficient, as in the case where the cap or stopper is sufficient. An object of the present invention is to provide a novel container cap that can prevent the contents from leaking.

[Means for solving the problem]

In order to solve the above-mentioned problem, the container cap of the present invention has an inner plug that closes the mouthpiece inside an exterior made up of a peripheral wall screwed to the mouthpiece of the container body and a top plate that covers an upper part of the peripheral wall. And a gas flow passage communicating with the outside air is provided between the inner plug and the exterior, and the inner plug is provided with a through hole for allowing the inside of the container main body and the gas flow passage to pass through. A container cap for providing a gas-permeable but liquid-impermeable membrane to the container cap for blocking the flow of the contents contained in the container body to the outside of the container body through the mouthpiece with the membrane. The lower surface of the plug is provided with an annular projection which abuts on the inner peripheral surface of the mouthpiece along the outer peripheral edge thereof and protrudes downward.

The membrane may be provided in at least one of the through holes opened at the upper end or the lower end of the inner plug.

[Action]

In the present invention, when the internal pressure of the main body container fluctuates, the inside air and the outside air enter and exit through the through hole of the inner plug provided with the membrane and the gas flow passage provided between the inner plug and the exterior.

Further, even if the contents contained in the container are liquid, the membrane provided in the inner plug does not allow the liquid to pass through, so that even if the container body falls down, the contents are prevented from flowing out.

In addition, the lower surface of the inner plug is provided with an annular projection that abuts against the inner peripheral surface of the mouthpiece along the outer peripheral edge thereof and protrudes downward, so that the inner peripheral surface of the mouthpiece and the annular The projections are in close contact with each other. Also, even if the inner plug itself has a through hole for letting the gas flow passage communicating with the outside air and the inside of the container main body pass, since this through hole is closed by the membrane,
As long as the cap is tightened so that the annular projection of the inner plug comes into contact with the inner peripheral surface of the mouthpiece and comes into close contact, the contents can be discharged to the outside of the container even if the cap is not completely tightened. There is no going out.

Furthermore, the inner plug is irregularly mounted in the outer casing, for example, obliquely, and the inner plug is obliquely fitted to the container mouth section due to the fitting of the outer casing to the container mouth section in this state. There is a case where it gets stuck. In this case, a gap is formed between the inner peripheral surface of the container mouth portion and the annular projection of the inner plug, and there is a possibility that the contents may go out through the gap. However, if the annular projection of the inner plug is set to be somewhat longer, the gap can be filled by the longer annular projection, so that the inner peripheral surface of the container mouth portion and the annular projection of the inner plug are still in close contact with each other. It will maintain its state. Therefore, depending on how long the annular projection is taken, even if the inner plug is obliquely fitted as described above, a gap is created between the inner peripheral surface of the container mouth tube and the annular projection of the inner plug. The contents can be prevented from leaving the container. Therefore, even if the container cap is tightened somewhat inadequately, and even if the inner plug is not properly attached to the exterior,
In other words, there is no problem even if the inner plug is not properly tightened.

〔Example〕

 Hereinafter, embodiments of the present invention will be described.

<Example 1> As shown in Fig. 1 and Fig. 2, a container cap 1 has a cylindrical peripheral wall 2 to be screwed to a mouthpiece portion 31 of a container main body 30, and a top plate that covers an upper portion of the peripheral wall 2. 3 is provided.

The inner periphery of the peripheral wall 2 has a thread groove into which the mouthpiece portion 31 of the container body 30 is screwed, and near the top plate 3 on the inner periphery, the first periphery is parallel to and close to the top plate 3. An annular projection 5 is provided. Spacer small protrusions 6 are provided at four positions on the lower surface of the top plate 3 near the peripheral wall, apart from each other.

Inside the exterior 4 surrounded by the top plate 3 and the peripheral wall 2 having such a structure, an inner plug 7 for closing the mouthpiece 31 of the container body 30 is provided.

The inner plug 7 is formed by coaxially combining two cylindrical bodies 8 and 9 having different diameters and the same pipe length. The tube length is shorter than the tube length of the cylindrical peripheral wall 2 of the container body. The large-diameter cylindrical body 8 and the small-diameter cylindrical body 9 have one end side downward and the other end side upward, and both are formed from below by a circular first closing plate 10 having a diameter equal to the diameter of the large-diameter cylindrical body 8. Closed and integrated. The first closing plate 10 is provided as a through hole 9 a of the cylindrical body 9 by hollowing out the inner ring of the small-diameter cylindrical body 9 in a circular shape. Further, a plurality of gas passage slits 12 are provided on the cylinder wall of the cylinder 9 in a vertically elongated shape.
Is closed by a circular second closing plate 13. Large diameter,
The lower ends of the two small-diameter cylindrical bodies 8 and 9, that is, the first closing plate 10
, The through hole 9a of the cylindrical body 9 is covered with a semipermeable membrane 11, so that substances other than gas do not flow through the cylindrical body 9 in the small-diameter cylindrical body 9.

The semipermeable membrane 11 is preferably a membrane made of a gas-impermeable material that cannot pass liquid, specifically Gore-Tech (trade name). This prevents moisture from entering the container that stores chemicals that do not like moisture.

A flange 14 protrudes concentrically in the centrifugal direction from the other end edge corresponding to the upper end of the large-diameter cylindrical body 8. The size of the flange 14 is such that the upper end edge of the mouth tube portion 31 of the container body 30 to be screwed can abut on the lower surface, and secures stability when the inner plug 7 is closed. An annular projection 15 is provided on the lower surface of the flange 14 along the outer peripheral edge thereof, in contact with the upper inner peripheral surface 31a of the mouthpiece portion 31 and protruding downward. Further, from the outer ring of the flange 14, a protrusion that is locked to the annular protrusion 5 in all directions in the outward direction.
16 sticks out. By locking the projection 16 to the annular projection 5, a space 16 a is formed between the projection 16 and the peripheral wall 2. The space 16a communicates with a screw groove space (not shown) formed by the screw groove between the peripheral wall 2 of the exterior 4 and the barrel portion 31. The screw groove space functions as an air passage because it communicates with the outside air.

The inner plug 7 is mounted inside the exterior 4. That is, the projection 16 protruding from the outer ring of the flange 14 is engaged with the first annular projection 5 provided close to the top plate 3 so that the second closing plate 13 is opposed to the top plate 3 close to the top plate 3. Two cylindrical bodies 8 and 9 having a small diameter and a small diameter are coaxially combined with the peripheral wall 2 of the exterior 4.

In addition, inside the exterior 4, the spacer small protrusions 6 on the back side of the top plate 3 abut on the upper surface of the flange 14 to form a certain space between the top plate 3 and the spacer small protrusions 6, and this is formed by gas flow. Road 17 The gas flow passage 17 communicates with the gas passage slit 12 and the through hole 9a, and the screw groove space and the space
Through 16a. Further, the through hole 9a is connected to the inside of the container body 30 via the semipermeable membrane 11 through which gas passes, as described above. Therefore, the outside of the container is in a ventilation relationship with the inside of the container body 30 through the route of the thread groove space-space 16a-gas flow passage 17-gas passage slit 12-through hole 9a-semi-permeable membrane 11.

According to such a container cap 1, when the internal pressure in the container main body 30 fluctuates, the container main body 30 passes through the semipermeable membrane 11, the through hole 9a, the gas passage slit 12, the gas flow passage 17, the space 16a, and the thread groove space. The inside of the room communicates with the outside air.

Also, even if the contents contained in the container are liquid, the semipermeable membrane 11 provided in the inner stopper 7 does not allow the liquid to pass through, so that when the container body 30 falls down, the contents flow out to the outside. To block.

Further, an annular projection 1 is provided on the lower surface of the inner plug 7 so as to abut against the inner peripheral surface 31a of the mouthpiece portion 31 and protrude downward along the outer peripheral edge thereof.
5, the inner peripheral surface 31a of the mouthpiece 31 and the annular projection 15 of the inner plug 7 are in close contact with each other. Also, a through hole in the inner plug 7 itself
9a is closed by the semipermeable membrane 11 as described above, so that the annular projection 15 of the inner plug 7 is
As long as the container cap 1 is tightened so that it comes into close contact with a, the contents will not come out even if the container cap 1 is not tightly tightened to the end.

Furthermore, the inner plug 7 is irregularly mounted in the outer casing 4, for example, at an angle, and in this state, the outer plug 4 is fitted into the container barrel section 31, so that the inner plug 7 is attached to the container barrel section 31. May be fitted obliquely with respect to. In this case, a gap is formed between the inner peripheral surface 31a of the container mouth tube portion 31 and the annular projection 15 of the inner plug 7, and there is a possibility that the contents may go out through the gap. However, as long as the annular projection 15 of the inner plug 7 is set to be somewhat longer, the annular projection 15 can absorb the gap. Therefore, depending on how long the annular projection 15 is taken, even if the inner plug 7 is obliquely fitted as described above, even if the inner plug 7 is
Since a gap can be prevented from being formed between a and the annular projection 15 of the inner plug 7, the contents can be prevented from going out of the container.
Therefore, even if the container cap 1 is tightened somewhat inadequately, and even if the inner plug 7 is not properly attached to the exterior 4, in other words, the inner plug 7 is not properly tightened, there is a problem. Absent. It is effective as a container cap for a storage container for a substance such as bleaching powder that has a property of absorbing moisture and releasing a gas such as chlorine gas or hypochlorous acid gas.

At the time of manufacture, the large-diameter cylinder 8 and the small-diameter cylinder 9 are integrated with a circular first closing plate 10, a semipermeable membrane 11 is provided to form the inner plug 7, and then the inner plug 7 and the exterior 4, the container cap 1 of the present invention can be formed, a semipermeable membrane relatively weak to mechanical external force can be handled in a mass production line, and the entire production is easy. There is also.

<Embodiment 2> As shown in Figs. 3 and 4, a first tubular body 18 having a short pipe length is suspended concentrically with the peripheral wall 2 inside the top plate 3.
The first cylindrical body 18 is provided with an air passage opening at a position where the central axes thereof are opposed to each other, by making a cut 19 which is long in the axial direction. An annular bulge is provided in the axial direction at the lower end edge of the first cylindrical body 18 divided into two by the cut 19 to form a third annular projection 19a. A locking portion is formed. Inside the first cylinder 18 is the first cylinder 18
Are provided with small spacer projections 6 inside.

The first annular projection 5 is provided at a distance from the top plate 3 and near the middle of the length of the peripheral wall 2 in parallel with the top plate 3.

The inner plug 7 is provided with a fourth annular projection 20 by annularly expanding the peripheral edge on one end side of the large-diameter cylindrical body 8 outward.

The inner plug 7 is mounted inside the exterior 4. That is, one end side of the two large-diameter and small-diameter cylinders 9 is set up and the other end is set down, and the fourth annular projection 20 is locked to the third annular projection 19a. Thereby, the semi-permeable membrane 11 provided at the upper ends of the two large-diameter and small-diameter cylindrical bodies 8, 9, that is, on one end side, is brought close to and opposed to the top plate 3. Two large and small diameter cylinders 8, 9
And the peripheral wall 2 are provided coaxially. The reference numeral 9a corresponds to the through hole 9a shown in the first embodiment, and is open at the upper end of the cylindrical body 9 and is covered by the semipermeable membrane 11.

The spacer small protrusion 6 inside the top plate 3 has the semi-permeable membrane 11
Is in contact with the closing plate 10 of the main body.

The second annular projection 15 protrudes downward from the flange 14.

 The rest is the same as the first embodiment.

A gas flow passage 17 through which gas passing through the semipermeable membrane 11 passes is formed between the semipermeable membrane 11 and the top plate 3.

The gas that has passed between the large-diameter cylinder 8 and the small-diameter cylinder 9 of the inner plug 7 inside the exterior 4 passes through the gas passage slit 12 of the small-diameter cylinder 9 and passes through the semipermeable membrane 11. Top plate 3 and semi-permeable membrane 11
Through the gas flow passage 17 between them. Also, gas flow passage
From 17, through the notch of the first cylindrical body 18, through the gap between the outer ring of the flange 14 and the peripheral wall 2, pass through between the projections 16 provided on the outer ring of the flange 14 and the screw of the peripheral wall 2. An air passage that escapes from the groove to the outside air is formed.

Such a container cap 1 has the same effect as that of the first embodiment, and is excellent in mechanical protection of the semipermeable membrane since the contents in the container body 30 do not directly collide with the semipermeable membrane 11. May be.

This embodiment has an effect that it is very easy to manufacture like the first embodiment.

[Effect of the invention]

Since the present invention is configured as described above, there is no outflow of the contents from the container body to the outside, and the circulation of air into and out of the container body is ensured.

[Brief description of the drawings]

1 is a half sectional view of the first embodiment, FIG. 2 is an exploded view of the first embodiment, FIG. 3 is a half sectional view of the second embodiment, and FIG. 4 is an exploded view of the second embodiment. DESCRIPTION OF SYMBOLS 1 ... Container cap, 2 ... Peripheral wall 3 ... Top plate, 4 ... Exterior 7 ... Inner plug, 9a ... Through hole 11 ... Annular protrusion, 15 ... Annular protrusion 17 ... Gas flow passage, 30 …… Container body 31 …… Cylindrical part, 31a …… Cylinder inner peripheral surface

Claims (2)

(57) [Scope of request for utility model registration] An inner cover for closing said mouth portion is provided in an outer housing comprising a peripheral wall screwed to a mouth portion of a container body and a top plate covering an upper portion of said peripheral wall. A gas flow passage communicating with the outside air is provided between the inner plug and the inner stopper; A container cap for blocking the flow of an internal substance contained in the container main body to the outside of the container main body through the mouthpiece portion with the membrane; A container cap provided with an annular projection which abuts on the inner peripheral surface of the mouthpiece portion along and projects downward. 2. The container cap according to claim 1, wherein the membrane is provided in at least one of a through hole opened at an upper end and a lower end of the inner plug.