JP3790850B2 - Air injector in spray can system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air injection tool in a spray can system.
[0002]
[Prior art]
Brake cleaning spray cans used in automobile maintenance shops and the like are disposable, and the adverse effects on the environment due to the disposal of empty cans and the emitted spray gas are problematic.
In view of this, a spray can using a filling type of brake cleaning liquid and using air instead of spray gas has been proposed.
[0003]
Examples of such spray cans that can be used repeatedly include those described in JP-A-8-156984. Further, as an air injecting tool for injecting pressurized air of a predetermined pressure from a pressurizing device into a spray can, the one described in JP-A-8-156982 has been proposed.
[0004]
[Problems to be solved by the invention]
In such a filling-type spray can, the air pressure is sufficient to inject all the cleaning liquid in the can, and a fixed amount of cleaning liquid is injected into the spray can and filled with pressurized air at a predetermined pressure. There is a need to.
In addition, if the spray can is filled with unnecessarily high pressure air, the spray can may be damaged.
[0005]
The present invention has been proposed in order to solve such problems of the conventional technology, and an object thereof is to provide an air injecting device that prevents a spray can from being filled with unnecessarily high pressure air. .
[0006]
[Means for Solving the Problems]
First, the spray can system will be described with reference to FIG.
The portable spray can A can spray a liquid B such as an internal cleaning liquid with pressurized air. After the liquid B has been used up, the liquid B in the liquid tank F is quantitatively injected into the spray can A from the opening of the upper base after removing the cap D of the spray can A using the metered liquid injection device H. Thereafter, pressurized air is injected into the spray can A from the pressure cylinder (pressurizing device) E using the air injection tool G via the air injection valve C at the bottom of the spray can A.
Thus, in the spray can system according to the present invention, since the liquid B and the pressurized air are filled, the spray can A can be used repeatedly.
[0007]
The air injecting device according to the present invention in this spray can system has a body having an air passage formed in the center and a valve body with a pin protruding from the tip side, and a hose to which pressurized air is supplied is connected. A hose joint is screwed to the rear part of the body, and a coil spring that is normally energized to close the valve seat of the air passage is fitted between the valve body in the body and the hose joint. When the charge joint is screwed onto the front of the body so that it is exposed to the air and the charge joint is pressed against the air injection valve at the bottom of the spray can, the pin of the valve body is pushed against the coil spring. An air passage is opened so that pressurized air is injected into the spray can, and a through-hole that penetrates to the air passage is formed in the small-diameter portion of the body so as to pass through the small-diameter portion of the body. A sleeve that closes the through hole is slidably fitted, and a coil spring that urges the sleeve so as to close the through hole is fitted between the sleeve and the charge joint, so that the specified value is exceeded in the spray can. When pressurized air is injected, the sleeve slides against the coil spring, and high-pressure air leaks to the outside from the through hole.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the configuration of the spray can will be briefly described with reference to FIGS. 1 and 2.
The base 2 is fixed to the upper opening of the spray can body 1 by caulking. A cap 3 is detachably attached to the base 2 by coupling with pins 4. A cylindrical portion 6 to which an injection valve 5 is attached is fixed inside the cap 3, and the cylindrical portion 6 is fitted into an O-ring 7 on the inner peripheral portion of the base 2, thereby Airtightness is maintained.
[0009]
An injection nozzle push button 8 is attached to the upper part of the injection valve 5. In the figure, reference numeral 9 denotes a liquid sucking tube.
In this spray can, the cap 3 is removed, the opening of the base 2 is opened, and a fixed amount of liquid is injected from the liquid tank into the can body 1 using a fixed amount liquid injection device.
[0010]
Thereafter, the cap 3 is closed, and pressurized air from the pressurizing device is filled into the can body 1 at a predetermined pressure using the air injection tool according to the present invention via the air injection valve 10 at the bottom of the spray can body 1.
In this spray can, the push button 8 of the spray valve is pushed by grasping the nozzle lever 11 attached to the upper part of the cap 3, and the liquid such as the cleaning liquid in the can is sprayed by the pressurized air from the tip of the nozzle pipe 12. It has become so.
[0011]
Next, the configuration of the air injection tool will be described with reference to FIG.
A hose joint 15 is screwed to a male screw portion 14 carved at the rear end of the tubular body 13. As shown in FIG. 4, the hose joint 15 is notched with a groove 16 for leaking high-pressure air.
A hose 17 is connected to the hose joint 15, and a plug (quick joint) 18 is attached to the other end of the hose 17 for one-touch connection to a pressure device.
[0012]
In the air passage 19 at the center of the body 13, a valve body 21 having a pin 20 extending long forward is fitted. A coil spring 22 is fitted between the valve body 21 and the hose joint 15. Normally, the valve body 21 is in contact with the valve receiver 23 and closed by the elastic force of the coil spring 22.
[0013]
A through hole 25 for leaking high-pressure air is formed vertically in the small diameter portion 24 at the front of the body 13. An O-ring 26 for holding airtightness is fitted in front of the through hole 25.
In the small diameter portion 24 of the body 13, a sleeve 27 that normally closes the through hole 25 is slidably fitted on the O-ring 26. An airtight holding O-ring 28 is fitted on the end surface of the sleeve 27.
[0014]
In addition, a charge joint 30 is screwed to a male screw portion 29 carved at the tip of the small diameter portion 24 of the body 13. A coil spring 31 that presses the sleeve 27 against the end face of the body 13 and urges the spring so as to close the through hole 25 is fitted between the sleeve 27 and the charge joint 30. The spring pressure of the coil spring 31 can regulate the air pressure when high pressure air is leaked. The spring strength can be arbitrarily changed according to the degree of screwing of the charge joint 30.
[0015]
The tip of the pin 20 protruding from the valve body 21 extends to the inside of the charge joint 30. An airtight holding O-ring 32 is fitted into the inner periphery of the charge joint 30.
An outer pipe 33 serving as a grip is fitted between the charge joint 30 and the hose joint 15.
[0016]
Next, the configuration of the air injection valve 10 provided at the bottom of the spray can will be described with reference to FIG.
A valve body 35 is fitted in the valve body 34. A coil spring 38 is fitted between the valve body 35 and the nut 36 for keeping the normal valve body 35 in contact with the valve receiver 37 by a resilient force and closing it. The pin 40 of the valve body 35 is biased by the coil spring 38 and faces the inside of the valve body 34. Reference numeral 39 denotes a lock nut.
[0017]
Next, the operation of the above-described air injection tool will be described.
First, the plug 18 at the end of the hose is connected to the pressure device.
Subsequently, the charge joint 30 of the air injection tool is pushed into the air injection valve 10 of the spray can. With this operation, as shown in FIG. 5, the pin 40 of the air injection valve 10 is pushed against the coil spring 38, the valve body 35 is opened, and the pin 20 on the air injection tool side also opposes the coil spring 22. It is pushed in and the valve body 21 opens.
Thereby, the pressurized air sent out from the pressurizing device passes through the air passage 19 of the air injection tool and is injected into the spray can main body 1 through the air injection valve 10.
[0018]
When the pressurized air injected into the spray can body 1 reaches a predetermined pressure of, for example, 7 kg / cm ² , the sleeve 27 slides forward against the coil spring 31 as shown in FIG. Air leaks from the through hole 25 of the body. The high-pressure air that has escaped from the through hole 25 escapes from the groove 16 of the hose joint 15 to the atmosphere.
[0019]
【The invention's effect】
As described above, according to the air injecting device of the present invention, when high pressure air of a predetermined pressure or more is to be injected into the spray can, the high pressure air leaks to the atmosphere. There is an advantage that it can be protected from. Further, the present invention has an advantage that the appearance is good and the workability is good because the air injection structure and the high-pressure air leak structure are integrated in a grip.
[Brief description of the drawings]
FIG. 1 is a side view showing a spray can according to the present invention.
FIG. 2 is a cross-sectional view showing a base portion of the spray can.
FIG. 3 is a cross-sectional view showing an air injection tool according to the present invention.
FIG. 4 is a front view showing a hose joint portion.
FIG. 5 is a cross-sectional view showing the operation of the air injection tool.
FIG. 6 is a cross-sectional view showing the operation of the air injection tool.
FIG. 7 is an explanatory view showing a spray can system according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Spray can body 2 Cap 3 Cap 4 Pin 5 Injection valve 6 Tube part 7 O-ring 8 Push button 9 Liquid sucking tube 10 Air injection valve 11 Nozzle lever 12 Nozzle pipe 13 Body 14 Male thread part 15 Hose joint 16 Groove 17 Hose 18 Plug 19 Air passage 20 Pin 21 Valve body 22 Coil spring 23 Valve receiver 24 Small diameter part 25 Through hole 26 O-ring 27 Sleeve 28 O-ring 29 Male thread part 30 Charge joint 31 Coil spring 32 O-ring 33 Outer pipe 34 Valve body 35 Valve Body 36 Nut 37 Valve receiver 38 Coil spring 39 Nut 40 Pin

Claims (1)

After injecting a fixed amount of liquid into the spray can body from the opening of the base fixed to the upper end of the spray can body, using a liquid meter injection device, and closing the opening of the base with a cap with an injection valve In a spray can system that allows repeated use of a spray can by injecting pressurized air at a predetermined pressure using an air injection tool from an air injection valve provided at the bottom of the spray can body,
A body with an air passage in the center is fitted with a valve body with a pin protruding from the tip, and a hose joint to which a hose to which pressurized air is supplied is connected is screwed to the rear of the body, A coil spring that urges the spring to close the valve seat of the passage is fitted between the valve body and the hose joint in the body, and the charge joint is placed on the front of the body so that the pin of the valve body is exposed at the tip. When the charge joint is pressed against the air injection valve at the bottom of the spray can, the pin of the valve body is pushed against the coil spring to open the air passage, and pressurized air is introduced into the spray can. None as injected,
A through-hole penetrating to the air passage is formed in the small-diameter portion of the body, and a sleeve that normally closes the through-hole is slidably fitted in the small-diameter portion of the body, and the sleeve is interposed between the sleeve and the charge joint. A coil spring that urges the spring so as to close the through hole is fitted, and when pressurized air exceeding the specified value is injected into the spray can, the sleeve slides against the coil spring and the high pressure from the through hole An air infusing device in a spray can system configured to leak air to the outside.

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