JPS5918271B2 - A container that discharges its contents using gas pressure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a container that discharges its contents using gas pressure.

Conventionally, there is a container of this type described in Japanese Utility Model Publication No. 13792/1983.

This is a piston in which an elastic synthetic resin layer 2 is provided on the inner wall of a cylindrical main body 1 to form a cylindrical chamber A, and a sliding foot 4 is wound around the outer periphery of the lower end inside the cylindrical chamber A. 3 is slidably inserted.

In this case, the sliding feet 4 of the piston 3 are elastically formed so as to partially bite into the resin layer 2 to make the outer periphery of the piston 3 airtight, thereby separating the cylindrical chamber A into an upper chamber Al and a lower chamber A2.
It has a structure in which the upper chamber Al is filled with contents 6 and the lower chamber A2 is filled with a propellant gas 5 such as high pressure gas, and when the pulp T is released, the 9 piston 3 releases the gas pressure of the propellant gas 5. The contents 6 are pushed up and discharged.

In the above conventional piston 3, friction with the inner wall of the main body 1 during movement is large, and smooth movement cannot be obtained.

5 This is because the tip of the sliding foot 4 provided on the piston 3 is moved with the tip partially biting into the elastic synthetic resin layer 2.

An object of the present invention is to enable the piston 3 to move smoothly while supplying zero lubricant oil to the contact portion between the piston and the inner wall of the main body 1.

The technical means of the present invention for solving the above problems is to configure the piston to include two independent pistons, one of which is a first piston.
The piston is made of an elastic material and is formed into an inverted deep dish shape, and the other second piston is similarly formed into an inverted deep dish shape.
The first pistons are inserted from the lower openings in an overlapping state with a lubricant interposed therebetween, and sliding feet are provided protruding from the outer periphery of the lower end opening edges of each of the pistons, and each of these sliding feet
This is so that it comes into contact with the inner circumferential wall surface of the main body o.

The above technical means works as follows. When each piston moves upward, the second piston pushes the first piston upward while supporting it in a floating state on the lubricant interposed between it and the first piston.

At this time, lubricant is supplied to the contact area between the sliding leg of the second piston and the inner wall surface of the main body, and the frictional resistance is reduced. n, - Based on the above-described effects of the technical means, the present invention has the following unique effects.

(1) Since the frictional resistance between the sliding foot and the contact portion of the main body is reduced, the upward movement of the piston becomes smooth.

(2) In addition to the airtightness of the outer circumference of the piston due to the sliding feet,
Since the lubricant provides a liquid seal, the airtightness between the upper and lower chambers is ensured, and there is no risk of high-pressure gas getting mixed into the contents of the upper chamber. (3) When the main body is deflected, according to the conventional piston, the sliding foot of the piston partially bites into the elastic synthetic resin layer, preventing smooth movement, but in the present invention In this case, since the sliding foot of the lower second piston comes into contact with the inner wall of the main body via the lubricant, there is little sliding resistance at this portion, and its posture is always stable.

Therefore, even if the upper first piston is tilted in relation to the main body, the lower second piston acts to correct this, thereby preventing the piston from tripping. Next, embodiments of the present invention described above will be described based on the drawings.

The structure of a pressure vessel according to a first embodiment of the present invention is shown in FIG.

The main body 1 is formed by deep drawing. After the main body 1 equipped with the nozzle 10 is inverted and filled with contents 6 such as toothpaste, hair styling product, etc., a first piston 30, which will be described later, is inserted into the main body 1 with its open part left behind. Next, after adding an appropriate amount of a lubricant 9 such as hydrophilic vaseline, grease, or balm oil, a second piston 40, which will be described later, is press-fitted in such a position as to fit into the first piston 30. As a result, the lubricant 9 is sealed in an annular chamber 44 formed by the inner circumferential wall of the first piston 30, the outer circumferential wall of the second piston 40, and the side wall of the cylinder chamber A. Thereafter, a propellant gas 5 such as high-pressure nitrogen gas, liquefied chlorofluorocarbon gas, or liquefied butane gas is sealed in the lower chamber A2, and the open portion of the main body 1 is closed. The lubricant 9 interposed in the gap between the first piston 30 and the second piston 40 is pressurized by the pressure action of the propellant gas 5 in the lower chamber A2, and is compressed and contracted slightly from its normal volume. . Therefore, even if the side wall of the cylinder chamber A is rough due to the deep drawing work of the main body 1,
A lubricant 9 is applied between the sliding foot 31 of the first piston and the side wall of the cylinder chamber.
It acts as a seal by trying to ooze out. To explain the structure of the first piston 30 and the second piston 40 described above, the first piston 30 is formed of synthetic resin having appropriate elasticity into an inverted deep dish shape, and its upper bottom part 37 is shaped like the shoulder part 19 of the main body 1. , and its body 32 is
It is set appropriately smaller than the inner diameter of the cylinder chamber A.

Further, a sliding foot 31 is wound protrudingly around the open lower end of the first piston 30, and its outer diameter is slightly larger than the inside diameter of the cylinder chamber A. Therefore, when the first piston 30 is inserted into the cylinder chamber A, the slide foot 31 is in pressure contact with the side wall of the cylinder chamber. Next, the structure of the second piston 40 is formed so that it is one size smaller than the first piston (for example, the outer diameter of the body of the second piston 40 is made 10 smaller than the inner diameter of the body of the first piston 30). The sliding foot 41 is in pressure contact with the side wall of the cylinder chamber A, similar to the sliding foot 31 described above. Now, to explain the actual use of the pressure vessel of the embodiment of the present invention described above, when the nozzle 10 is pressed down to release the sealed state of the contents, the contents 6 are released by the same action as explained in the conventional example. It is discharged from the nozzle 10.

When the first and second pistons move upward, as shown in FIG. 3, the lubricant 9 oozes out between the sliding feet 41 of the second piston 40 and the side wall of the cylinder chamber A, smoothing the movement of the pistons.

Furthermore, in the first embodiment, another slide leg 36 (third
If the lubricant (dotted line in the figure) is wound and protruded and a space is left between each slide, there is absolutely no fear that the contents 6 will get mixed into the lubricant 9.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the conventional example, FIG. 2 is a partially cutaway side view of the embodiment of the present invention, and FIG. 3 is a sectional view of the main part thereof.
1... Main body, 5... Propelling gas, 9...
...Lubricant, 10...Nozzle, A1...
...Upper chamber, A2...Lower chamber.

Claims (1)

[Claims] 1 A piston that slides in an airtight outer periphery is loaded inside a cylindrical main body 1 equipped with a nozzle 10, and the contents 6 are propelled into the upper chamber A1 above the piston, and the content is propelled into the lower chamber A2 below. In the container in which the gas 5 is sealed, the piston is composed of two independent pistons, one of the first pistons 30 is made of an elastic material and is formed into an inverted deep dish shape; The other formed second piston 40 is inserted from the lower opening of the first piston 30 into an overlapping state with the lubricant 9 interposed therebetween, and each of the pistons 30
, 40, in which sliding feet 31, 41 are provided protruding from the outer periphery of the opening edge of the lower end, and each of these sliding feet 31, 41 is in contact with the inner circumferential wall surface of the main body 1, and the contents are discharged by gas pressure. .