JPH09142552A - Spray can with bleeder plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily bleed the remaining gas in a spray can only by cutting off the lower end of a tube on disposing the spray can, by fitting a bleeding plug made of flexible synthetic resin integrally provided with the tube closed at the lower end to the bottom of the spray can. SOLUTION: A taper hole 2 is opened at the center of the bottom 1 when the bottom 1 of the spray can is shaped in a press-process to form it semispherically. The upper end projection 6 of a bleeding plug 3 made of flexible synthetic resin is pushed into the tapered hole from the upper side by grasping the plug by a robot or the like to close the taper hole 2. The bleeding hole 4 is opened from the upper end projection 6 and closed at the lower end of the tube 7, in the bleeding plug 3. After the contents in the spray have been exhausted, the can is turned upside down and the tube 7 is cut off by scissors or nippers to open the bleeding hole 4 to the outside air to remove the remaining gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention provides a gas vent plug (3) in a tapered hole (2) at the bottom of a spray can, and cuts a tube portion (7) of the gas vent plug (3) with scissors or nippers. The present invention relates to a spray can with a gas vent plug in which residual gas is degassed and the tube portion (7) is melted by heat to allow gas to escape even if it is thrown into a fire without accidentally degassing.

[0002]

2. Description of the Related Art Conventionally, the degassing of spray cans has been such that the producer writes a note to degas the product, and the degassing of the spray can is left up to the consumer. I used to use tools and nails to remove gas.

[0003]

However, these methods described above have the following drawbacks. Commercially available gas vents have needles on pliers, and they open a hole laterally across a can, but they are expensive and take space to store them. Therefore, many consumers used nails and hammers to degas, but this method is unstable because it is impossible to hold the nail and spray can with one hand at the same time. It was dangerous. Therefore, in many cases, the gas was discarded without being discharged.

In consideration of the above facts, the present invention does not require a consumer to use a degassing tool for a dedicated spray can, and can simply and safely degas a gas without accidentally degassing it in a fire. The aim is to obtain a spray can that also provides the safety that the gas will automatically escape when heated.

[0005]

A spray can with a gas vent plug according to the present invention according to claim 1 has a tapered hole (2), a gas vent hole (4) extending from an upper end projection (6) to a lower port. The taper hole (2) is provided with a soft synthetic resin gas vent plug (3) which is opened at the bottom and closed at the lower end of the tube portion (7). The present invention is a spray can having a degassing plug having the above-mentioned configuration.

According to the second aspect of the present invention, there is provided a spray can with a degassing plug and a method for manufacturing the same, wherein the bottom of the spray can is attached before the bottom (1) of the spray can is attached to the spray can body (5). Taper hole (2) in the center of (1)
Keep open. After grasping the upper protrusion (6) of the degassing plug (3) in the hole and pushing it into the taper hole of the spray can from above to close the taper hole (2) of the spray can, 5) A method for producing a spray can with a gas vent plug, which is characterized in that the spray can is attached.

[0007]

The operation of the present invention according to claims 1 and 2 will be described below.

First, when the present invention according to claim 1 is used, the contents of the spray can are used up, then the spray can with the gas vent plug of the present invention is turned upside down, and the portion of the tube (7) is scissors or scissors. A spray can structure with a gas vent plug that can be cut off with a nipper to remove residual gas.

According to the second aspect of the present invention, since the present invention cannot be manufactured by a normal spray can manufacturing process, the manufacturing process must be changed. That is, the tapered hole (2) must be opened at the time of pressing the bottom (1) of the spray can of FIG. 3 into a hemispherical shape. After that, by grasping the upper end projection (6) of the soft synthetic resin degassing plug (3) with a robot or the like and pushing it into the taper hole (2) from above, the taper hole (2) of the spray can of FIG. 4 is closed,
The assembly of the bottom of the spray can (1) and the degassing plug (3) of soft synthetic resin is completed. Next is a manufacturing method in which the assembly of the bottom (1) of the spray can and the degassing plug (3) of the soft synthetic resin is combined with the spray can body (5). Encapsulating the contents and gas of the spray can with conventional processes.

[0010]

EXAMPLE An example of a spray can with a gas vent plug and a method for producing the same according to the first and second aspects of the present invention, in which a gas vent hole (4) is opened from the top projection (6) from above and a tube portion is formed. Closed at the lower end of (7), good tightness,
The gas vent plug (3) is made of a soft synthetic resin that is not violated by the content liquid, for example, synthetic rubber such as polypropylene or polyethylene. Although the upper and lower central portions of the gas vent plug (3) are thin, they are made thicker than the tapered hole (2) by a predetermined diameter in order to increase the airtightness. Further, just below the narrowed upper and lower central portions of the gas vent plug (3), the elasticity of the soft synthetic resin can be pushed into the tapered hole (2) from above as shown in FIG. 3, but the tapered hole ( 2) It is wedge-shaped so that it does not bite into the lower terminal part and does not come out, and it is thickened to a predetermined thickness. The upper part of the inside of the can of the gas vent plug (3) has an umbrella shape, and the upper end protrusion (6) can be formed by a robot or the like.
4 is grasped and pushed into the tapered hole (2) from above, the gas vent plug (3) in FIG. 4 cannot be pulled out from the tapered hole (2). When the assembly of the bottom (1) of the spray can and the soft synthetic resin gas vent plug (3) made above is attached to the spray can body (5) and the contents and gas are enclosed, the gas vent plug (3) and the taper are tapered. Due to the synergistic effect of the tapered shape of the hole (2) and the umbrella shape of the inner side of the can of the gas vent plug (3), it is pushed into the tapered hole (2) by the internal pressure of the spray can, and the sealing degree is further increased. , The contents never leak out. Since the tube portion (7) is thin, it does not swell due to the internal pressure of the spray can. When the present invention is used with the above structure, after the contents of the spray can are used up, the can is turned upside down and the tube portion (7) is cut with scissors or nippers to remove residual gas. good.

[0011]

As described above, the spray can with a gas vent plug and the method for producing the same according to the first and second aspects of the present invention are provided with a tube (7) when the contents of the spray can are used up. Residual gas in the spray can can be easily removed by simply cutting off the part with scissors or nippers.
Since there is no need for a special degassing tool, there is no risk of punching holes in the spray can, and there is an effect of correcting the disposal of the can without degassing the spray can. Moreover, even if you accidentally forget to release the gas and it is thrown into the fire, the tube (7) will be melted by the heat and the residual gas will automatically escape to function as a safety valve, preventing accidents due to explosion. I can do things.

[0012]

[Brief description of the drawings]

FIG. 1 is a front view of a spray can in which a lower portion of the present invention is broken.

FIG. 2 is an enlarged sectional view of a main part.

FIG. 3 is a sectional view of an essential part showing a plug attachment manufacturing process.

FIG. 4 is a cross-sectional view of a main part showing a manufacturing process of attaching the bottom of the spray can and the spray can main body.

[Explanation of symbols]

 1. Bottom of spray can 2. Taper hole 3. Gas vent plug 4. Vent hole 5. Spray can body 6. Top protrusion 7. Tube part

Claims (2)

[Claims] 1. A can of a soft synthetic resin gas vent plug (3) having a gas vent hole (4) opened from above to below the upper end projection (6) and closed at the lower end of a tube portion (7). The structure of the spray can with the vent plug provided in the tapered hole (2) at the center of the bottom (1) of the. 2. A spray can with a vent plug according to claim 1, wherein the bottom (1) of the spray can (1) of FIG. 3 is attached to the spray can body (5) before being attached to the spray can body (5). ), A taper hole (2) is opened, the upper end protrusion (6) of the gas vent plug (3) is grasped, and the taper hole (2) is pushed into the taper hole (2) of the bottom (1) of the spray can from above. 4. The method for producing a spray can with a degassing plug, characterized in that the bottom (1) of the spray can of FIG. 4 is attached to the spray can main body (5) after sealing.