JPS5821992Y2 - Timed opening device for high pressure gas filled cans - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a timed opening device for cans filled with high-pressure gas such as methyl bromide.

Various methods have been proposed for opening a standard high-pressure gas-filled can before use, but all of them are of the type in which the gas inside the can is blown out at the same time as the can is opened.

For example, to explain the case of canned methyl bromide used for soil fumigation, the soil to be fumigated is plowed and ridged, then a plastic sheet is placed and the hem of the plastic sheet is pressed down with soil. Place the can along with the can opener.

To open a can, press the can against a can opener from the outside of the vinyl, make a hole in the side of the can with a cut-and-raised piece formed on the can opener, and then immediately stand the can upright.

At the same time as the pores are formed, the methyl bromide inside is ejected.

Fumigation must be carried out from outside the vinyl to ensure the safety of the workers and those around them, but this makes it difficult to open the can and often damages the vinyl.

Damage to vinyl not only reduces the fumigation effect, but also causes a lack of safety for workers, and in some cases can even lead to a serious accident.

In order to avoid such troublesome work when opening cans,
Some workers even use the simple method of opening the can outside the plastic and then throwing the can inside the plastic, but this simple method is not without its dangers, and can Effective fumigation cannot be expected unless it is kept upright inside the vinyl.

The conventional can opening operation described above becomes increasingly troublesome when a large number of cans are placed on a large area of soil for fumigation.

For indoor fumigation of abandoned warehouses, etc., workers must open the cans while wearing safety equipment such as gas masks, and must quickly escape from the room after opening the cans.

The above-mentioned inconvenience caused by opening cans is caused by the fact that the high-pressure gas is poisonous and spews out at the same time as the can is opened. Therefore, it is desirable to have a can-opening device that spews out high-pressure gas after a predetermined period of time has passed after opening the can. was.

The present invention has been developed in response to this demand, in which a can opening device is attached to the cap of a high-pressure gas-filled can whose gas inlet is sealed with a cap, and a space is provided inside the can opening device that is sealed at least when attached. A hollow punch needle that protrudes outside the device and has the other end within the space and when one end is struck, moves in one direction while maintaining the sealed state of the closed space and pierces the camp at the other end; A predetermined length of a substance that can be removed by the action of high-pressure gas is placed inside the hollow needle, such as a soluble substance residue that is dissolved by the high-pressure gas or a viscous substance that is not soluble but can be moved inside the needle by the pressure of the high-pressure gas. Fill the can to a full extent, and allow the high-pressure gas in the can to flow into the closed space by perforating the camp with the punch, and the high-pressure gas dissolves the soluble substance or moves the viscous substance, thereby opening the closed space. The needle is connected to the atmosphere through the needle, and the high pressure gas inside the can is blown out into the atmosphere.

The accompanying drawings show embodiments of the present invention, and the present invention will be described below with reference to the drawings.

FIG. 1 is a top perspective view of a high-pressure gas filling can. The can 1 has a high-pressure gas filling opening 1b at the center of the upper end of a cylindrical body 1a.

After the high-pressure gas is sealed in the can 1, the filling port 1b is hermetically sealed with a cap 2.

The airtight camp 2 is a metal dish-shaped cap, and FIG. 2 shows the cap 2 in use.

FIG. 3 is an axial view of the can opening device according to the present invention, and the can opening device 3 includes an outer cylinder 31, an elastic holding member 32 fixedly held inside the outer cylinder 31, It is composed of a hollow needle 33 that extends through the center of the elastic holding member 32 in an airtight manner.

The outer cylinder 31 is made of metal, for example, and has a lower end that expands outward and is press-fitted into the inside of the cap 2 to be attached to the cap 2.

The elastic holding member 32 has an internal space 32a, and the tip 33a of the striking needle 33 terminates within this space 32a.

The tip 33a of the punching needle 33 is made sharp enough to penetrate the camp 2 and make a hole when the opposite end head 33b is hit hard.

A detachment prevention hook 33d is provided on a part of the scraped punching needle 33, so that when the punching needle is strongly struck, the hook 33d is engaged with the perforated part of the camp 2, so that the hammering needle does not come off due to the internal pressure of the can.

The inside of the punching needle 33 is filled with a viscous substance 33c that does not react with high-pressure gas or change its quality due to high-pressure gas, and its consistency is generally about 100 to 400, although it depends on the gas pressure inside the can. It's pleasant.

As the viscous substance, if the enclosed high-pressure gas is methyl bromide, an oil such as a lubricating grease containing mineral oil base oil and/or a metal soap thickener as a main ingredient may be selected as the viscous substance.
In addition, pressure-sensitive adhesives and the like are used.

Instead of a viscous substance, a soluble substance that can be dissolved by high-pressure gas may be used, such as ABC resin, vinyl chloride resin, polycarbonate, etc.

In order to use the can opening device according to the present invention, the head 33b of the opposite end of the punching needle 33 is struck hard, and the sharp tip 33a is used to penetrate the camp 2 and pierce the can. The viscous substance 33c inside the needle 33 is pushed upward by the gas pressure of the liquefied gas flowing into the liquefied gas 32a.

When the viscous substance 33e is completely extruded from the punch needle 33 for a certain period of time, the internal space 32a is communicated with the atmosphere and the liquefied gas is transferred to the punch needle 3.
3 and is ejected from the upper end in the form of mist.

The time required for the high-pressure liquefied gas to start blowing out after the head 33b of the punching needle 33 is struck, that is, the time limit, is adjusted based on the viscosity of the viscous substance and the length gK of the punching needle.

This device has the advantage that the time limit completion time can be predicted based on the length of the viscous substance 33c pushed out from the needle 33.

Even if a viscous substance is dissolved by the liquefied gas filled in the internal space 32aK, the dissolved components will not flow into the can 1 due to the gas pressure. There is no deterioration.

In this embodiment, a press-fit engagement between the outer cylinder and the cap was used to attach the can opening device to the cap, but other appropriate connection methods such as screw engagement between the can opening device and the cap may also be used. I can do it.

The invented can opening device can be applied to high-pressure gas cans whose filling openings are sealed with caps, and can be used regardless of the type of gas by selecting the material of the fusible plate according to the type of sealed gas. You can do it.

In either application, there are no inconveniences associated with conventional fumigation using seed cans, and the method is extremely advantageous, especially in terms of ensuring worker safety.

[Brief explanation of drawings]

Fig. 1 of the accompanying drawings is a top perspective view of a high-pressure gas-filled can opened by a filter opening device according to the present invention, Fig. 2 is a perspective view showing a state in which the gas-filled inlet of an F1 can is capped; FIG. 3 is a central sectional view of the filter opening device according to the present invention.

Claims (1)

[Scope of utility model registration request] A connecting part for attaching a can-opening device to the cap of a high-pressure gas-filled can whose gas inlet is sealed with a cap, an internal space that is sealed at least in the installed state, and one end protruding outside the can-opening device and the other end. is located in the sealed space and can move in one direction in the sealed space while maintaining a sealed state, and a substance that can be removed by the action of high-pressure gas sealed in the can is contained inside the needle. is filled over a predetermined length, and by banging one end of the needle, the other end penetrates the cap, allowing high-pressure gas inside the can to act on the removable substance through the sealed space. A time-limited can opening device for high-pressure gas-filled cans.